CbC/CbC_gcc: zlib/deflate.c annotate

author	kent <kent@cr.ie.u-ryukyu.ac.jp>
date	Sun, 07 Feb 2010 18:27:48 +0900
parents
children	04ced10e8804

rev	line source
51 ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1 /* deflate.c -- compress data using the deflation algorithm
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	2 * Copyright (C) 1995-2005 Jean-loup Gailly.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	3 * For conditions of distribution and use, see copyright notice in zlib.h
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	4 */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	5
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	6 /*
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	7 * ALGORITHM
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	8 *
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	9 * The "deflation" process depends on being able to identify portions
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	10 * of the input text which are identical to earlier input (within a
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	11 * sliding window trailing behind the input currently being processed).
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	12 *
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	13 * The most straightforward technique turns out to be the fastest for
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	14 * most input files: try all possible matches and select the longest.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	15 * The key feature of this algorithm is that insertions into the string
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	16 * dictionary are very simple and thus fast, and deletions are avoided
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	17 * completely. Insertions are performed at each input character, whereas
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	18 * string matches are performed only when the previous match ends. So it
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	19 * is preferable to spend more time in matches to allow very fast string
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	20 * insertions and avoid deletions. The matching algorithm for small
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	21 * strings is inspired from that of Rabin & Karp. A brute force approach
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	22 * is used to find longer strings when a small match has been found.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	23 * A similar algorithm is used in comic (by Jan-Mark Wams) and freeze
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	24 * (by Leonid Broukhis).
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	25 * A previous version of this file used a more sophisticated algorithm
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	26 * (by Fiala and Greene) which is guaranteed to run in linear amortized
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	27 * time, but has a larger average cost, uses more memory and is patented.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	28 * However the F&G algorithm may be faster for some highly redundant
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	29 * files if the parameter max_chain_length (described below) is too large.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	30 *
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	31 * ACKNOWLEDGEMENTS
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	32 *
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	33 * The idea of lazy evaluation of matches is due to Jan-Mark Wams, and
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	34 * I found it in 'freeze' written by Leonid Broukhis.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	35 * Thanks to many people for bug reports and testing.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	36 *
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	37 * REFERENCES
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	38 *
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	39 * Deutsch, L.P.,"DEFLATE Compressed Data Format Specification".
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	40 * Available in http://www.ietf.org/rfc/rfc1951.txt
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	41 *
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	42 * A description of the Rabin and Karp algorithm is given in the book
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	43 * "Algorithms" by R. Sedgewick, Addison-Wesley, p252.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	44 *
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	45 * Fiala,E.R., and Greene,D.H.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	46 * Data Compression with Finite Windows, Comm.ACM, 32,4 (1989) 490-595
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	47 *
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	48 */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	49
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	50 /* @(#) $Id: deflate.c,v 1.1.1.2 2002/03/11 21:53:23 tromey Exp $ */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	51
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	52 #include "deflate.h"
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	53
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	54 const char deflate_copyright[] =
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	55 " deflate 1.2.3 Copyright 1995-2005 Jean-loup Gailly ";
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	56 /*
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	57 If you use the zlib library in a product, an acknowledgment is welcome
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	58 in the documentation of your product. If for some reason you cannot
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	59 include such an acknowledgment, I would appreciate that you keep this
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	60 copyright string in the executable of your product.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	61 */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	62
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	63 /* ===========================================================================
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	64 * Function prototypes.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	65 */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	66 typedef enum {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	67 need_more, /* block not completed, need more input or more output */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	68 block_done, /* block flush performed */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	69 finish_started, /* finish started, need only more output at next deflate */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	70 finish_done /* finish done, accept no more input or output */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	71 } block_state;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	72
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	73 typedef block_state (compress_func) OF((deflate_state s, int flush));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	74 /* Compression function. Returns the block state after the call. */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	75
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	76 local void fill_window OF((deflate_state *s));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	77 local block_state deflate_stored OF((deflate_state *s, int flush));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	78 local block_state deflate_fast OF((deflate_state *s, int flush));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	79 #ifndef FASTEST
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	80 local block_state deflate_slow OF((deflate_state *s, int flush));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	81 #endif
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	82 local void lm_init OF((deflate_state *s));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	83 local void putShortMSB OF((deflate_state *s, uInt b));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	84 local void flush_pending OF((z_streamp strm));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	85 local int read_buf OF((z_streamp strm, Bytef *buf, unsigned size));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	86 #ifndef FASTEST
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	87 #ifdef ASMV
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	88 void match_init OF((void)); /* asm code initialization */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	89 uInt longest_match OF((deflate_state *s, IPos cur_match));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	90 #else
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	91 local uInt longest_match OF((deflate_state *s, IPos cur_match));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	92 #endif
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	93 #endif
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	94 local uInt longest_match_fast OF((deflate_state *s, IPos cur_match));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	95
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	96 #ifdef DEBUG
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	97 local void check_match OF((deflate_state *s, IPos start, IPos match,
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	98 int length));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	99 #endif
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	100
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	101 /* ===========================================================================
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	102 * Local data
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	103 */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	104
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	105 #define NIL 0
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	106 /* Tail of hash chains */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	107
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	108 #ifndef TOO_FAR
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	109 # define TOO_FAR 4096
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	110 #endif
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	111 /* Matches of length 3 are discarded if their distance exceeds TOO_FAR */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	112
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	113 #define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	114 /* Minimum amount of lookahead, except at the end of the input file.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	115 * See deflate.c for comments about the MIN_MATCH+1.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	116 */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	117
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	118 /* Values for max_lazy_match, good_match and max_chain_length, depending on
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	119 * the desired pack level (0..9). The values given below have been tuned to
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	120 * exclude worst case performance for pathological files. Better values may be
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	121 * found for specific files.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	122 */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	123 typedef struct config_s {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	124 ush good_length; /* reduce lazy search above this match length */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	125 ush max_lazy; /* do not perform lazy search above this match length */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	126 ush nice_length; /* quit search above this match length */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	127 ush max_chain;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	128 compress_func func;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	129 } config;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	130
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	131 #ifdef FASTEST
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	132 local const config configuration_table[2] = {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	133 /* good lazy nice chain */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	134 /* 0 / {0, 0, 0, 0, deflate_stored}, / store only */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	135 /* 1 / {4, 4, 8, 4, deflate_fast}}; / max speed, no lazy matches */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	136 #else
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	137 local const config configuration_table[10] = {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	138 /* good lazy nice chain */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	139 /* 0 / {0, 0, 0, 0, deflate_stored}, / store only */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	140 /* 1 / {4, 4, 8, 4, deflate_fast}, / max speed, no lazy matches */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	141 /* 2 */ {4, 5, 16, 8, deflate_fast},
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	142 /* 3 */ {4, 6, 32, 32, deflate_fast},
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	143
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	144 /* 4 / {4, 4, 16, 16, deflate_slow}, / lazy matches */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	145 /* 5 */ {8, 16, 32, 32, deflate_slow},
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	146 /* 6 */ {8, 16, 128, 128, deflate_slow},
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	147 /* 7 */ {8, 32, 128, 256, deflate_slow},
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	148 /* 8 */ {32, 128, 258, 1024, deflate_slow},
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	149 /* 9 / {32, 258, 258, 4096, deflate_slow}}; / max compression */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	150 #endif
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	151
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	152 /* Note: the deflate() code requires max_lazy >= MIN_MATCH and max_chain >= 4
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	153 * For deflate_fast() (levels <= 3) good is ignored and lazy has a different
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	154 * meaning.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	155 */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	156
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	157 #define EQUAL 0
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	158 /* result of memcmp for equal strings */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	159
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	160 #ifndef NO_DUMMY_DECL
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	161 struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	162 #endif
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	163
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	164 /* ===========================================================================
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	165 * Update a hash value with the given input byte
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	166 * IN assertion: all calls to to UPDATE_HASH are made with consecutive
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	167 * input characters, so that a running hash key can be computed from the
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	168 * previous key instead of complete recalculation each time.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	169 */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	170 #define UPDATE_HASH(s,h,c) (h = (((h)<<s->hash_shift) ^ (c)) & s->hash_mask)
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	171
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	172
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	173 /* ===========================================================================
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	174 * Insert string str in the dictionary and set match_head to the previous head
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	175 * of the hash chain (the most recent string with same hash key). Return
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	176 * the previous length of the hash chain.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	177 * If this file is compiled with -DFASTEST, the compression level is forced
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	178 * to 1, and no hash chains are maintained.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	179 * IN assertion: all calls to to INSERT_STRING are made with consecutive
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	180 * input characters and the first MIN_MATCH bytes of str are valid
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	181 * (except for the last MIN_MATCH-1 bytes of the input file).
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	182 */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	183 #ifdef FASTEST
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	184 #define INSERT_STRING(s, str, match_head) \
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	185 (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	186 match_head = s->head[s->ins_h], \
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	187 s->head[s->ins_h] = (Pos)(str))
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	188 #else
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	189 #define INSERT_STRING(s, str, match_head) \
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	190 (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	191 match_head = s->prev[(str) & s->w_mask] = s->head[s->ins_h], \
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	192 s->head[s->ins_h] = (Pos)(str))
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	193 #endif
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	194
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	195 /* ===========================================================================
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	196 * Initialize the hash table (avoiding 64K overflow for 16 bit systems).
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	197 * prev[] will be initialized on the fly.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	198 */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	199 #define CLEAR_HASH(s) \
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	200 s->head[s->hash_size-1] = NIL; \
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	201 zmemzero((Bytef )s->head, (unsigned)(s->hash_size-1)sizeof(*s->head));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	202
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	203 /* ========================================================================= */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	204 int ZEXPORT deflateInit_(strm, level, version, stream_size)
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	205 z_streamp strm;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	206 int level;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	207 const char *version;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	208 int stream_size;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	209 {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	210 return deflateInit2_(strm, level, Z_DEFLATED, MAX_WBITS, DEF_MEM_LEVEL,
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	211 Z_DEFAULT_STRATEGY, version, stream_size);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	212 /* To do: ignore strm->next_in if we use it as window */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	213 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	214
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	215 /* ========================================================================= */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	216 int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	217 version, stream_size)
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	218 z_streamp strm;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	219 int level;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	220 int method;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	221 int windowBits;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	222 int memLevel;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	223 int strategy;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	224 const char *version;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	225 int stream_size;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	226 {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	227 deflate_state *s;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	228 int wrap = 1;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	229 static const char my_version[] = ZLIB_VERSION;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	230
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	231 ushf *overlay;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	232 /* We overlay pending_buf and d_buf+l_buf. This works since the average
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	233 * output size for (length,distance) codes is <= 24 bits.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	234 */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	235
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	236 if (version == Z_NULL \|\| version[0] != my_version[0] \|\|
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	237 stream_size != sizeof(z_stream)) {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	238 return Z_VERSION_ERROR;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	239 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	240 if (strm == Z_NULL) return Z_STREAM_ERROR;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	241
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	242 strm->msg = Z_NULL;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	243 if (strm->zalloc == (alloc_func)0) {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	244 strm->zalloc = zcalloc;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	245 strm->opaque = (voidpf)0;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	246 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	247 if (strm->zfree == (free_func)0) strm->zfree = zcfree;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	248
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	249 #ifdef FASTEST
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	250 if (level != 0) level = 1;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	251 #else
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	252 if (level == Z_DEFAULT_COMPRESSION) level = 6;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	253 #endif
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	254
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	255 if (windowBits < 0) { /* suppress zlib wrapper */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	256 wrap = 0;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	257 windowBits = -windowBits;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	258 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	259 #ifdef GZIP
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	260 else if (windowBits > 15) {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	261 wrap = 2; /* write gzip wrapper instead */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	262 windowBits -= 16;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	263 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	264 #endif
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	265 if (memLevel < 1 \|\| memLevel > MAX_MEM_LEVEL \|\| method != Z_DEFLATED \|\|
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	266 windowBits < 8 \|\| windowBits > 15 \|\| level < 0 \|\| level > 9 \|\|
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	267 strategy < 0 \|\| strategy > Z_FIXED) {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	268 return Z_STREAM_ERROR;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	269 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	270 if (windowBits == 8) windowBits = 9; /* until 256-byte window bug fixed */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	271 s = (deflate_state *) ZALLOC(strm, 1, sizeof(deflate_state));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	272 if (s == Z_NULL) return Z_MEM_ERROR;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	273 strm->state = (struct internal_state FAR *)s;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	274 s->strm = strm;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	275
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	276 s->wrap = wrap;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	277 s->gzhead = Z_NULL;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	278 s->w_bits = windowBits;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	279 s->w_size = 1 << s->w_bits;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	280 s->w_mask = s->w_size - 1;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	281
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	282 s->hash_bits = memLevel + 7;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	283 s->hash_size = 1 << s->hash_bits;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	284 s->hash_mask = s->hash_size - 1;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	285 s->hash_shift = ((s->hash_bits+MIN_MATCH-1)/MIN_MATCH);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	286
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	287 s->window = (Bytef ) ZALLOC(strm, s->w_size, 2sizeof(Byte));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	288 s->prev = (Posf *) ZALLOC(strm, s->w_size, sizeof(Pos));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	289 s->head = (Posf *) ZALLOC(strm, s->hash_size, sizeof(Pos));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	290
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	291 s->lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	292
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	293 overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	294 s->pending_buf = (uchf *) overlay;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	295 s->pending_buf_size = (ulg)s->lit_bufsize * (sizeof(ush)+2L);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	296
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	297 if (s->window == Z_NULL \|\| s->prev == Z_NULL \|\| s->head == Z_NULL \|\|
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	298 s->pending_buf == Z_NULL) {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	299 s->status = FINISH_STATE;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	300 strm->msg = (char*)ERR_MSG(Z_MEM_ERROR);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	301 deflateEnd (strm);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	302 return Z_MEM_ERROR;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	303 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	304 s->d_buf = overlay + s->lit_bufsize/sizeof(ush);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	305 s->l_buf = s->pending_buf + (1+sizeof(ush))*s->lit_bufsize;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	306
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	307 s->level = level;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	308 s->strategy = strategy;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	309 s->method = (Byte)method;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	310
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	311 return deflateReset(strm);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	312 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	313
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	314 /* ========================================================================= */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	315 int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	316 z_streamp strm;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	317 const Bytef *dictionary;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	318 uInt dictLength;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	319 {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	320 deflate_state *s;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	321 uInt length = dictLength;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	322 uInt n;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	323 IPos hash_head = 0;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	324
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	325 if (strm == Z_NULL \|\| strm->state == Z_NULL \|\| dictionary == Z_NULL \|\|
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	326 strm->state->wrap == 2 \|\|
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	327 (strm->state->wrap == 1 && strm->state->status != INIT_STATE))
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	328 return Z_STREAM_ERROR;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	329
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	330 s = strm->state;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	331 if (s->wrap)
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	332 strm->adler = adler32(strm->adler, dictionary, dictLength);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	333
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	334 if (length < MIN_MATCH) return Z_OK;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	335 if (length > MAX_DIST(s)) {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	336 length = MAX_DIST(s);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	337 dictionary += dictLength - length; /* use the tail of the dictionary */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	338 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	339 zmemcpy(s->window, dictionary, length);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	340 s->strstart = length;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	341 s->block_start = (long)length;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	342
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	343 /* Insert all strings in the hash table (except for the last two bytes).
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	344 * s->lookahead stays null, so s->ins_h will be recomputed at the next
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	345 * call of fill_window.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	346 */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	347 s->ins_h = s->window[0];
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	348 UPDATE_HASH(s, s->ins_h, s->window[1]);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	349 for (n = 0; n <= length - MIN_MATCH; n++) {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	350 INSERT_STRING(s, n, hash_head);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	351 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	352 if (hash_head) hash_head = 0; /* to make compiler happy */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	353 return Z_OK;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	354 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	355
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	356 /* ========================================================================= */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	357 int ZEXPORT deflateReset (strm)
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	358 z_streamp strm;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	359 {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	360 deflate_state *s;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	361
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	362 if (strm == Z_NULL \|\| strm->state == Z_NULL \|\|
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	363 strm->zalloc == (alloc_func)0 \|\| strm->zfree == (free_func)0) {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	364 return Z_STREAM_ERROR;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	365 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	366
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	367 strm->total_in = strm->total_out = 0;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	368 strm->msg = Z_NULL; /* use zfree if we ever allocate msg dynamically */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	369 strm->data_type = Z_UNKNOWN;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	370
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	371 s = (deflate_state *)strm->state;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	372 s->pending = 0;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	373 s->pending_out = s->pending_buf;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	374
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	375 if (s->wrap < 0) {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	376 s->wrap = -s->wrap; /* was made negative by deflate(..., Z_FINISH); */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	377 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	378 s->status = s->wrap ? INIT_STATE : BUSY_STATE;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	379 strm->adler =
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	380 #ifdef GZIP
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	381 s->wrap == 2 ? crc32(0L, Z_NULL, 0) :
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	382 #endif
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	383 adler32(0L, Z_NULL, 0);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	384 s->last_flush = Z_NO_FLUSH;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	385
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	386 _tr_init(s);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	387 lm_init(s);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	388
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	389 return Z_OK;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	390 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	391
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	392 /* ========================================================================= */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	393 int ZEXPORT deflateSetHeader (strm, head)
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	394 z_streamp strm;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	395 gz_headerp head;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	396 {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	397 if (strm == Z_NULL \|\| strm->state == Z_NULL) return Z_STREAM_ERROR;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	398 if (strm->state->wrap != 2) return Z_STREAM_ERROR;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	399 strm->state->gzhead = head;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	400 return Z_OK;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	401 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	402
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	403 /* ========================================================================= */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	404 int ZEXPORT deflatePrime (strm, bits, value)
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	405 z_streamp strm;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	406 int bits;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	407 int value;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	408 {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	409 if (strm == Z_NULL \|\| strm->state == Z_NULL) return Z_STREAM_ERROR;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	410 strm->state->bi_valid = bits;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	411 strm->state->bi_buf = (ush)(value & ((1 << bits) - 1));
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	412 return Z_OK;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	413 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	414
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	415 /* ========================================================================= */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	416 int ZEXPORT deflateParams(strm, level, strategy)
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	417 z_streamp strm;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	418 int level;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	419 int strategy;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	420 {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	421 deflate_state *s;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	422 compress_func func;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	423 int err = Z_OK;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	424
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	425 if (strm == Z_NULL \|\| strm->state == Z_NULL) return Z_STREAM_ERROR;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	426 s = strm->state;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	427
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	428 #ifdef FASTEST
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	429 if (level != 0) level = 1;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	430 #else
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	431 if (level == Z_DEFAULT_COMPRESSION) level = 6;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	432 #endif
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	433 if (level < 0 \|\| level > 9 \|\| strategy < 0 \|\| strategy > Z_FIXED) {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	434 return Z_STREAM_ERROR;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	435 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	436 func = configuration_table[s->level].func;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	437
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	438 if (func != configuration_table[level].func && strm->total_in != 0) {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	439 /* Flush the last buffer: */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	440 err = deflate(strm, Z_PARTIAL_FLUSH);
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	441 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	442 if (s->level != level) {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	443 s->level = level;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	444 s->max_lazy_match = configuration_table[level].max_lazy;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	445 s->good_match = configuration_table[level].good_length;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	446 s->nice_match = configuration_table[level].nice_length;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	447 s->max_chain_length = configuration_table[level].max_chain;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	448 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	449 s->strategy = strategy;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	450 return err;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	451 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	452
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	453 /* ========================================================================= */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	454 int ZEXPORT deflateTune(strm, good_length, max_lazy, nice_length, max_chain)
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	455 z_streamp strm;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	456 int good_length;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	457 int max_lazy;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	458 int nice_length;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	459 int max_chain;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	460 {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	461 deflate_state *s;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	462
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	463 if (strm == Z_NULL \|\| strm->state == Z_NULL) return Z_STREAM_ERROR;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	464 s = strm->state;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	465 s->good_match = good_length;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	466 s->max_lazy_match = max_lazy;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	467 s->nice_match = nice_length;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	468 s->max_chain_length = max_chain;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	469 return Z_OK;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	470 }
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	471
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	472 /* =========================================================================
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	473 * For the default windowBits of 15 and memLevel of 8, this function returns
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	474 * a close to exact, as well as small, upper bound on the compressed size.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	475 * They are coded as constants here for a reason--if the #define's are
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	476 * changed, then this function needs to be changed as well. The return
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	477 * value for 15 and 8 only works for those exact settings.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	478 *
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	479 * For any setting other than those defaults for windowBits and memLevel,
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	480 * the value returned is a conservative worst case for the maximum expansion
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	481 * resulting from using fixed blocks instead of stored blocks, which deflate
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	482 * can emit on compressed data for some combinations of the parameters.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	483 *
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	484 * This function could be more sophisticated to provide closer upper bounds
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	485 * for every combination of windowBits and memLevel, as well as wrap.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	486 * But even the conservative upper bound of about 14% expansion does not
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	487 * seem onerous for output buffer allocation.
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	488 */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	489 uLong ZEXPORT deflateBound(strm, sourceLen)
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	490 z_streamp strm;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	491 uLong sourceLen;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	492 {
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	493 deflate_state *s;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	494 uLong destLen;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	495
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	496 /* conservative upper bound */
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	497 destLen = sourceLen +
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	498 ((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 11;
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	499
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten. kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	500 /* if can't get parameters, return conservative bound */

51

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1 /* deflate.c -- compress data using the deflation algorithm

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

3 * For conditions of distribution and use, see copyright notice in zlib.h

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

4 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

5

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

6 /*

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

7 * ALGORITHM

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

8 *

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

9 * The "deflation" process depends on being able to identify portions

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

10 * of the input text which are identical to earlier input (within a

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

11 * sliding window trailing behind the input currently being processed).

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

12 *

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

13 * The most straightforward technique turns out to be the fastest for

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

14 * most input files: try all possible matches and select the longest.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

15 * The key feature of this algorithm is that insertions into the string

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

16 * dictionary are very simple and thus fast, and deletions are avoided

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

17 * completely. Insertions are performed at each input character, whereas

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

18 * string matches are performed only when the previous match ends. So it

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

19 * is preferable to spend more time in matches to allow very fast string

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

20 * insertions and avoid deletions. The matching algorithm for small

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

21 * strings is inspired from that of Rabin & Karp. A brute force approach

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

22 * is used to find longer strings when a small match has been found.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

23 * A similar algorithm is used in comic (by Jan-Mark Wams) and freeze

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

24 * (by Leonid Broukhis).

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

25 * A previous version of this file used a more sophisticated algorithm

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

26 * (by Fiala and Greene) which is guaranteed to run in linear amortized

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

27 * time, but has a larger average cost, uses more memory and is patented.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

28 * However the F&G algorithm may be faster for some highly redundant

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

29 * files if the parameter max_chain_length (described below) is too large.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

30 *

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

31 * ACKNOWLEDGEMENTS

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

32 *

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

33 * The idea of lazy evaluation of matches is due to Jan-Mark Wams, and

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

34 * I found it in 'freeze' written by Leonid Broukhis.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

35 * Thanks to many people for bug reports and testing.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

36 *

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

37 * REFERENCES

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

38 *

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

39 * Deutsch, L.P.,"DEFLATE Compressed Data Format Specification".

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

40 * Available in http://www.ietf.org/rfc/rfc1951.txt

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

41 *

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

42 * A description of the Rabin and Karp algorithm is given in the book

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

43 * "Algorithms" by R. Sedgewick, Addison-Wesley, p252.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

44 *

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

45 * Fiala,E.R., and Greene,D.H.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

46 * Data Compression with Finite Windows, Comm.ACM, 32,4 (1989) 490-595

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

47 *

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

48 */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

49

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

50 /* @(#) $Id: deflate.c,v 1.1.1.2 2002/03/11 21:53:23 tromey Exp $ */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

51

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

52 #include "deflate.h"

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

53

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

54 const char deflate_copyright[] =

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

56 /*

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

57 If you use the zlib library in a product, an acknowledgment is welcome

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

58 in the documentation of your product. If for some reason you cannot

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

59 include such an acknowledgment, I would appreciate that you keep this

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

60 copyright string in the executable of your product.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

61 */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

62

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

63 /* ===========================================================================

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

64 * Function prototypes.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

65 */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

66 typedef enum {

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

67 need_more, /* block not completed, need more input or more output */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

68 block_done, /* block flush performed */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

69 finish_started, /* finish started, need only more output at next deflate */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

70 finish_done /* finish done, accept no more input or output */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

71 } block_state;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

72

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

73 typedef block_state (*compress_func) OF((deflate_state *s, int flush));

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

74 /* Compression function. Returns the block state after the call. */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

75

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

76 local void fill_window OF((deflate_state *s));

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

77 local block_state deflate_stored OF((deflate_state *s, int flush));

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

78 local block_state deflate_fast OF((deflate_state *s, int flush));

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

79 #ifndef FASTEST

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

80 local block_state deflate_slow OF((deflate_state *s, int flush));

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

81 #endif

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

82 local void lm_init OF((deflate_state *s));

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

83 local void putShortMSB OF((deflate_state *s, uInt b));

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

84 local void flush_pending OF((z_streamp strm));

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

85 local int read_buf OF((z_streamp strm, Bytef *buf, unsigned size));

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

86 #ifndef FASTEST

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

87 #ifdef ASMV

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

88 void match_init OF((void)); /* asm code initialization */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

89 uInt longest_match OF((deflate_state *s, IPos cur_match));

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

90 #else

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

91 local uInt longest_match OF((deflate_state *s, IPos cur_match));

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

92 #endif

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

93 #endif

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

94 local uInt longest_match_fast OF((deflate_state *s, IPos cur_match));

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

95

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

96 #ifdef DEBUG

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

97 local void check_match OF((deflate_state *s, IPos start, IPos match,

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

98 int length));

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

99 #endif

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

100

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

101 /* ===========================================================================

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

102 * Local data

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

103 */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

104

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

105 #define NIL 0

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

106 /* Tail of hash chains */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

107

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

108 #ifndef TOO_FAR

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

109 # define TOO_FAR 4096

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

110 #endif

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

111 /* Matches of length 3 are discarded if their distance exceeds TOO_FAR */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

112

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

113 #define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

114 /* Minimum amount of lookahead, except at the end of the input file.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

115 * See deflate.c for comments about the MIN_MATCH+1.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

116 */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

117

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

118 /* Values for max_lazy_match, good_match and max_chain_length, depending on

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

119 * the desired pack level (0..9). The values given below have been tuned to

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

120 * exclude worst case performance for pathological files. Better values may be

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

121 * found for specific files.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

122 */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

123 typedef struct config_s {

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

124 ush good_length; /* reduce lazy search above this match length */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

125 ush max_lazy; /* do not perform lazy search above this match length */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

126 ush nice_length; /* quit search above this match length */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

127 ush max_chain;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

128 compress_func func;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

129 } config;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

130

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

131 #ifdef FASTEST

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

132 local const config configuration_table[2] = {

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

133 /* good lazy nice chain */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

134 /* 0 */ {0, 0, 0, 0, deflate_stored}, /* store only */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

135 /* 1 */ {4, 4, 8, 4, deflate_fast}}; /* max speed, no lazy matches */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

136 #else

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

137 local const config configuration_table[10] = {

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

138 /* good lazy nice chain */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

139 /* 0 */ {0, 0, 0, 0, deflate_stored}, /* store only */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

140 /* 1 */ {4, 4, 8, 4, deflate_fast}, /* max speed, no lazy matches */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

141 /* 2 */ {4, 5, 16, 8, deflate_fast},

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

142 /* 3 */ {4, 6, 32, 32, deflate_fast},

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

143

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

144 /* 4 */ {4, 4, 16, 16, deflate_slow}, /* lazy matches */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

145 /* 5 */ {8, 16, 32, 32, deflate_slow},

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

146 /* 6 */ {8, 16, 128, 128, deflate_slow},

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

147 /* 7 */ {8, 32, 128, 256, deflate_slow},

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

148 /* 8 */ {32, 128, 258, 1024, deflate_slow},

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

149 /* 9 */ {32, 258, 258, 4096, deflate_slow}}; /* max compression */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

150 #endif

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

151

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

152 /* Note: the deflate() code requires max_lazy >= MIN_MATCH and max_chain >= 4

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

153 * For deflate_fast() (levels <= 3) good is ignored and lazy has a different

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

154 * meaning.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

155 */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

156

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

157 #define EQUAL 0

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

158 /* result of memcmp for equal strings */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

159

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

160 #ifndef NO_DUMMY_DECL

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

161 struct static_tree_desc_s {int dummy;}; /* for buggy compilers */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

162 #endif

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

163

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

164 /* ===========================================================================

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

165 * Update a hash value with the given input byte

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

166 * IN assertion: all calls to to UPDATE_HASH are made with consecutive

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

167 * input characters, so that a running hash key can be computed from the

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

168 * previous key instead of complete recalculation each time.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

169 */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

170 #define UPDATE_HASH(s,h,c) (h = (((h)<<s->hash_shift) ^ (c)) & s->hash_mask)

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

171

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

172

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

173 /* ===========================================================================

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

174 * Insert string str in the dictionary and set match_head to the previous head

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

175 * of the hash chain (the most recent string with same hash key). Return

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

176 * the previous length of the hash chain.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

177 * If this file is compiled with -DFASTEST, the compression level is forced

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

178 * to 1, and no hash chains are maintained.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

179 * IN assertion: all calls to to INSERT_STRING are made with consecutive

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

180 * input characters and the first MIN_MATCH bytes of str are valid

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

181 * (except for the last MIN_MATCH-1 bytes of the input file).

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

182 */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

183 #ifdef FASTEST

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

184 #define INSERT_STRING(s, str, match_head) \

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

185 (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

186 match_head = s->head[s->ins_h], \

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

187 s->head[s->ins_h] = (Pos)(str))

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

188 #else

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

189 #define INSERT_STRING(s, str, match_head) \

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

190 (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

191 match_head = s->prev[(str) & s->w_mask] = s->head[s->ins_h], \

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

192 s->head[s->ins_h] = (Pos)(str))

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

193 #endif

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

194

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

195 /* ===========================================================================

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

196 * Initialize the hash table (avoiding 64K overflow for 16 bit systems).

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

197 * prev[] will be initialized on the fly.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

198 */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

199 #define CLEAR_HASH(s) \

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

200 s->head[s->hash_size-1] = NIL; \

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

201 zmemzero((Bytef *)s->head, (unsigned)(s->hash_size-1)*sizeof(*s->head));

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

202

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

203 /* ========================================================================= */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

204 int ZEXPORT deflateInit_(strm, level, version, stream_size)

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

205 z_streamp strm;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

206 int level;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

207 const char *version;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

208 int stream_size;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

209 {

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

210 return deflateInit2_(strm, level, Z_DEFLATED, MAX_WBITS, DEF_MEM_LEVEL,

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

211 Z_DEFAULT_STRATEGY, version, stream_size);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

212 /* To do: ignore strm->next_in if we use it as window */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

213 }

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

214

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

215 /* ========================================================================= */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

216 int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

217 version, stream_size)

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

218 z_streamp strm;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

219 int level;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

220 int method;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

221 int windowBits;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

222 int memLevel;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

223 int strategy;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

224 const char *version;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

225 int stream_size;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

226 {

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

227 deflate_state *s;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

228 int wrap = 1;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

229 static const char my_version[] = ZLIB_VERSION;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

230

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

231 ushf *overlay;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

232 /* We overlay pending_buf and d_buf+l_buf. This works since the average

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

233 * output size for (length,distance) codes is <= 24 bits.

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

234 */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

235

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

236 if (version == Z_NULL || version[0] != my_version[0] ||

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

237 stream_size != sizeof(z_stream)) {

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

238 return Z_VERSION_ERROR;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

239 }

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

240 if (strm == Z_NULL) return Z_STREAM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

241

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

242 strm->msg = Z_NULL;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

243 if (strm->zalloc == (alloc_func)0) {

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

244 strm->zalloc = zcalloc;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

245 strm->opaque = (voidpf)0;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

246 }

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

247 if (strm->zfree == (free_func)0) strm->zfree = zcfree;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

248

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

249 #ifdef FASTEST

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

250 if (level != 0) level = 1;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

251 #else

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

252 if (level == Z_DEFAULT_COMPRESSION) level = 6;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

253 #endif

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

254

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

255 if (windowBits < 0) { /* suppress zlib wrapper */

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

256 wrap = 0;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

257 windowBits = -windowBits;

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

258 }

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kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

259 #ifdef GZIP

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

260 else if (windowBits > 15) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

261 wrap = 2; /* write gzip wrapper instead */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

262 windowBits -= 16;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

263 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

264 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

265 if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method != Z_DEFLATED ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

266 windowBits < 8 || windowBits > 15 || level < 0 || level > 9 ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

267 strategy < 0 || strategy > Z_FIXED) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

268 return Z_STREAM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

269 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

270 if (windowBits == 8) windowBits = 9; /* until 256-byte window bug fixed */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

271 s = (deflate_state *) ZALLOC(strm, 1, sizeof(deflate_state));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

272 if (s == Z_NULL) return Z_MEM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

273 strm->state = (struct internal_state FAR *)s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

274 s->strm = strm;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

275

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

276 s->wrap = wrap;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

277 s->gzhead = Z_NULL;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

278 s->w_bits = windowBits;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

279 s->w_size = 1 << s->w_bits;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

280 s->w_mask = s->w_size - 1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

281

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

282 s->hash_bits = memLevel + 7;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

283 s->hash_size = 1 << s->hash_bits;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

284 s->hash_mask = s->hash_size - 1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

285 s->hash_shift = ((s->hash_bits+MIN_MATCH-1)/MIN_MATCH);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

286

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

287 s->window = (Bytef *) ZALLOC(strm, s->w_size, 2*sizeof(Byte));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

288 s->prev = (Posf *) ZALLOC(strm, s->w_size, sizeof(Pos));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

289 s->head = (Posf *) ZALLOC(strm, s->hash_size, sizeof(Pos));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

290

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

291 s->lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

292

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

293 overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

294 s->pending_buf = (uchf *) overlay;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

295 s->pending_buf_size = (ulg)s->lit_bufsize * (sizeof(ush)+2L);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

296

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

297 if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

298 s->pending_buf == Z_NULL) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

299 s->status = FINISH_STATE;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

300 strm->msg = (char*)ERR_MSG(Z_MEM_ERROR);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

301 deflateEnd (strm);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

302 return Z_MEM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

303 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

304 s->d_buf = overlay + s->lit_bufsize/sizeof(ush);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

305 s->l_buf = s->pending_buf + (1+sizeof(ush))*s->lit_bufsize;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

306

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

307 s->level = level;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

308 s->strategy = strategy;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

309 s->method = (Byte)method;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

310

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

311 return deflateReset(strm);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

312 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

313

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

314 /* ========================================================================= */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

315 int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

316 z_streamp strm;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

317 const Bytef *dictionary;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

318 uInt dictLength;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

319 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

320 deflate_state *s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

321 uInt length = dictLength;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

322 uInt n;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

323 IPos hash_head = 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

324

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

325 if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

326 strm->state->wrap == 2 ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

327 (strm->state->wrap == 1 && strm->state->status != INIT_STATE))

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

328 return Z_STREAM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

329

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

330 s = strm->state;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

331 if (s->wrap)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

332 strm->adler = adler32(strm->adler, dictionary, dictLength);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

333

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

334 if (length < MIN_MATCH) return Z_OK;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

335 if (length > MAX_DIST(s)) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

336 length = MAX_DIST(s);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

337 dictionary += dictLength - length; /* use the tail of the dictionary */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

338 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

339 zmemcpy(s->window, dictionary, length);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

340 s->strstart = length;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

341 s->block_start = (long)length;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

342

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

343 /* Insert all strings in the hash table (except for the last two bytes).

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

344 * s->lookahead stays null, so s->ins_h will be recomputed at the next

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

345 * call of fill_window.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

346 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

347 s->ins_h = s->window[0];

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

348 UPDATE_HASH(s, s->ins_h, s->window[1]);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

349 for (n = 0; n <= length - MIN_MATCH; n++) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

350 INSERT_STRING(s, n, hash_head);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

351 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

352 if (hash_head) hash_head = 0; /* to make compiler happy */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

353 return Z_OK;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

354 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

355

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

356 /* ========================================================================= */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

357 int ZEXPORT deflateReset (strm)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

358 z_streamp strm;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

359 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

360 deflate_state *s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

361

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

362 if (strm == Z_NULL || strm->state == Z_NULL ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

363 strm->zalloc == (alloc_func)0 || strm->zfree == (free_func)0) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

364 return Z_STREAM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

365 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

366

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

367 strm->total_in = strm->total_out = 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

368 strm->msg = Z_NULL; /* use zfree if we ever allocate msg dynamically */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

369 strm->data_type = Z_UNKNOWN;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

370

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

371 s = (deflate_state *)strm->state;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

372 s->pending = 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

373 s->pending_out = s->pending_buf;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

374

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

375 if (s->wrap < 0) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

376 s->wrap = -s->wrap; /* was made negative by deflate(..., Z_FINISH); */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

377 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

378 s->status = s->wrap ? INIT_STATE : BUSY_STATE;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

379 strm->adler =

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

380 #ifdef GZIP

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

381 s->wrap == 2 ? crc32(0L, Z_NULL, 0) :

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

382 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

383 adler32(0L, Z_NULL, 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

384 s->last_flush = Z_NO_FLUSH;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

385

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

386 _tr_init(s);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

387 lm_init(s);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

388

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

389 return Z_OK;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

390 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

391

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

392 /* ========================================================================= */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

393 int ZEXPORT deflateSetHeader (strm, head)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

394 z_streamp strm;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

395 gz_headerp head;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

396 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

397 if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

398 if (strm->state->wrap != 2) return Z_STREAM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

399 strm->state->gzhead = head;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

400 return Z_OK;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

401 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

402

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

403 /* ========================================================================= */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

404 int ZEXPORT deflatePrime (strm, bits, value)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

405 z_streamp strm;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

406 int bits;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

407 int value;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

408 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

409 if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

410 strm->state->bi_valid = bits;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

411 strm->state->bi_buf = (ush)(value & ((1 << bits) - 1));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

412 return Z_OK;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

413 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

414

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

415 /* ========================================================================= */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

416 int ZEXPORT deflateParams(strm, level, strategy)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

417 z_streamp strm;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

418 int level;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

419 int strategy;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

420 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

421 deflate_state *s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

422 compress_func func;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

423 int err = Z_OK;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

424

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

425 if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

426 s = strm->state;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

427

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

428 #ifdef FASTEST

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

429 if (level != 0) level = 1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

430 #else

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

431 if (level == Z_DEFAULT_COMPRESSION) level = 6;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

432 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

433 if (level < 0 || level > 9 || strategy < 0 || strategy > Z_FIXED) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

434 return Z_STREAM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

435 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

436 func = configuration_table[s->level].func;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

437

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

438 if (func != configuration_table[level].func && strm->total_in != 0) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

439 /* Flush the last buffer: */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

440 err = deflate(strm, Z_PARTIAL_FLUSH);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

441 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

442 if (s->level != level) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

443 s->level = level;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

444 s->max_lazy_match = configuration_table[level].max_lazy;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

445 s->good_match = configuration_table[level].good_length;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

446 s->nice_match = configuration_table[level].nice_length;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

447 s->max_chain_length = configuration_table[level].max_chain;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

448 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

449 s->strategy = strategy;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

450 return err;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

451 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

452

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

453 /* ========================================================================= */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

454 int ZEXPORT deflateTune(strm, good_length, max_lazy, nice_length, max_chain)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

455 z_streamp strm;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

456 int good_length;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

457 int max_lazy;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

458 int nice_length;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

459 int max_chain;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

460 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

461 deflate_state *s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

462

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

463 if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

464 s = strm->state;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

465 s->good_match = good_length;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

466 s->max_lazy_match = max_lazy;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

467 s->nice_match = nice_length;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

468 s->max_chain_length = max_chain;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

469 return Z_OK;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

470 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

471

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

472 /* =========================================================================

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

473 * For the default windowBits of 15 and memLevel of 8, this function returns

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

474 * a close to exact, as well as small, upper bound on the compressed size.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

475 * They are coded as constants here for a reason--if the #define's are

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

476 * changed, then this function needs to be changed as well. The return

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

477 * value for 15 and 8 only works for those exact settings.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

478 *

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

479 * For any setting other than those defaults for windowBits and memLevel,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

480 * the value returned is a conservative worst case for the maximum expansion

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

481 * resulting from using fixed blocks instead of stored blocks, which deflate

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

482 * can emit on compressed data for some combinations of the parameters.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

483 *

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

484 * This function could be more sophisticated to provide closer upper bounds

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

485 * for every combination of windowBits and memLevel, as well as wrap.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

486 * But even the conservative upper bound of about 14% expansion does not

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

487 * seem onerous for output buffer allocation.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

488 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

489 uLong ZEXPORT deflateBound(strm, sourceLen)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

490 z_streamp strm;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

491 uLong sourceLen;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

492 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

493 deflate_state *s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

494 uLong destLen;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

495

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

496 /* conservative upper bound */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

497 destLen = sourceLen +

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

498 ((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 11;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

499

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

500 /* if can't get parameters, return conservative bound */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

501 if (strm == Z_NULL || strm->state == Z_NULL)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

502 return destLen;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

503

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

504 /* if not default parameters, return conservative bound */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

505 s = strm->state;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

506 if (s->w_bits != 15 || s->hash_bits != 8 + 7)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

507 return destLen;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

508

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

509 /* default settings: return tight bound for that case */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

510 return compressBound(sourceLen);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

511 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

512

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

513 /* =========================================================================

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

514 * Put a short in the pending buffer. The 16-bit value is put in MSB order.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

515 * IN assertion: the stream state is correct and there is enough room in

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

516 * pending_buf.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

517 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

518 local void putShortMSB (s, b)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

519 deflate_state *s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

520 uInt b;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

521 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

522 put_byte(s, (Byte)(b >> 8));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

523 put_byte(s, (Byte)(b & 0xff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

524 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

525

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

526 /* =========================================================================

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

527 * Flush as much pending output as possible. All deflate() output goes

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

528 * through this function so some applications may wish to modify it

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

529 * to avoid allocating a large strm->next_out buffer and copying into it.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

530 * (See also read_buf()).

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

531 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

532 local void flush_pending(strm)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

533 z_streamp strm;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

534 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

535 unsigned len = strm->state->pending;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

536

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

537 if (len > strm->avail_out) len = strm->avail_out;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

538 if (len == 0) return;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

539

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

540 zmemcpy(strm->next_out, strm->state->pending_out, len);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

541 strm->next_out += len;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

542 strm->state->pending_out += len;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

543 strm->total_out += len;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

544 strm->avail_out -= len;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

545 strm->state->pending -= len;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

546 if (strm->state->pending == 0) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

547 strm->state->pending_out = strm->state->pending_buf;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

548 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

549 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

550

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

551 /* ========================================================================= */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

552 int ZEXPORT deflate (strm, flush)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

553 z_streamp strm;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

554 int flush;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

555 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

556 int old_flush; /* value of flush param for previous deflate call */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

557 deflate_state *s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

558

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

559 if (strm == Z_NULL || strm->state == Z_NULL ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

560 flush > Z_FINISH || flush < 0) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

561 return Z_STREAM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

562 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

563 s = strm->state;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

564

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

565 if (strm->next_out == Z_NULL ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

566 (strm->next_in == Z_NULL && strm->avail_in != 0) ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

567 (s->status == FINISH_STATE && flush != Z_FINISH)) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

568 ERR_RETURN(strm, Z_STREAM_ERROR);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

569 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

570 if (strm->avail_out == 0) ERR_RETURN(strm, Z_BUF_ERROR);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

571

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

572 s->strm = strm; /* just in case */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

573 old_flush = s->last_flush;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

574 s->last_flush = flush;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

575

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

576 /* Write the header */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

577 if (s->status == INIT_STATE) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

578 #ifdef GZIP

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

579 if (s->wrap == 2) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

580 strm->adler = crc32(0L, Z_NULL, 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

581 put_byte(s, 31);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

582 put_byte(s, 139);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

583 put_byte(s, 8);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

584 if (s->gzhead == NULL) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

585 put_byte(s, 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

586 put_byte(s, 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

587 put_byte(s, 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

588 put_byte(s, 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

589 put_byte(s, 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

590 put_byte(s, s->level == 9 ? 2 :

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

591 (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

592 4 : 0));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

593 put_byte(s, OS_CODE);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

594 s->status = BUSY_STATE;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

595 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

596 else {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

597 put_byte(s, (s->gzhead->text ? 1 : 0) +

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

598 (s->gzhead->hcrc ? 2 : 0) +

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

599 (s->gzhead->extra == Z_NULL ? 0 : 4) +

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

600 (s->gzhead->name == Z_NULL ? 0 : 8) +

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

601 (s->gzhead->comment == Z_NULL ? 0 : 16)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

602 );

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

603 put_byte(s, (Byte)(s->gzhead->time & 0xff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

604 put_byte(s, (Byte)((s->gzhead->time >> 8) & 0xff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

605 put_byte(s, (Byte)((s->gzhead->time >> 16) & 0xff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

606 put_byte(s, (Byte)((s->gzhead->time >> 24) & 0xff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

607 put_byte(s, s->level == 9 ? 2 :

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

608 (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

609 4 : 0));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

610 put_byte(s, s->gzhead->os & 0xff);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

611 if (s->gzhead->extra != NULL) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

612 put_byte(s, s->gzhead->extra_len & 0xff);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

613 put_byte(s, (s->gzhead->extra_len >> 8) & 0xff);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

614 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

615 if (s->gzhead->hcrc)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

616 strm->adler = crc32(strm->adler, s->pending_buf,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

617 s->pending);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

618 s->gzindex = 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

619 s->status = EXTRA_STATE;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

620 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

621 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

622 else

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

623 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

624 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

625 uInt header = (Z_DEFLATED + ((s->w_bits-8)<<4)) << 8;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

626 uInt level_flags;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

627

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

628 if (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

629 level_flags = 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

630 else if (s->level < 6)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

631 level_flags = 1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

632 else if (s->level == 6)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

633 level_flags = 2;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

634 else

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

635 level_flags = 3;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

636 header |= (level_flags << 6);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

637 if (s->strstart != 0) header |= PRESET_DICT;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

638 header += 31 - (header % 31);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

639

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

640 s->status = BUSY_STATE;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

641 putShortMSB(s, header);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

642

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

643 /* Save the adler32 of the preset dictionary: */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

644 if (s->strstart != 0) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

645 putShortMSB(s, (uInt)(strm->adler >> 16));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

646 putShortMSB(s, (uInt)(strm->adler & 0xffff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

647 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

648 strm->adler = adler32(0L, Z_NULL, 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

649 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

650 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

651 #ifdef GZIP

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

652 if (s->status == EXTRA_STATE) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

653 if (s->gzhead->extra != NULL) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

654 uInt beg = s->pending; /* start of bytes to update crc */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

655

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

656 while (s->gzindex < (s->gzhead->extra_len & 0xffff)) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

657 if (s->pending == s->pending_buf_size) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

658 if (s->gzhead->hcrc && s->pending > beg)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

659 strm->adler = crc32(strm->adler, s->pending_buf + beg,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

660 s->pending - beg);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

661 flush_pending(strm);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

662 beg = s->pending;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

663 if (s->pending == s->pending_buf_size)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

664 break;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

665 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

666 put_byte(s, s->gzhead->extra[s->gzindex]);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

667 s->gzindex++;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

668 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

669 if (s->gzhead->hcrc && s->pending > beg)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

670 strm->adler = crc32(strm->adler, s->pending_buf + beg,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

671 s->pending - beg);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

672 if (s->gzindex == s->gzhead->extra_len) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

673 s->gzindex = 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

674 s->status = NAME_STATE;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

675 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

676 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

677 else

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

678 s->status = NAME_STATE;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

679 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

680 if (s->status == NAME_STATE) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

681 if (s->gzhead->name != NULL) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

682 uInt beg = s->pending; /* start of bytes to update crc */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

683 int val;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

684

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

685 do {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

686 if (s->pending == s->pending_buf_size) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

687 if (s->gzhead->hcrc && s->pending > beg)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

688 strm->adler = crc32(strm->adler, s->pending_buf + beg,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

689 s->pending - beg);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

690 flush_pending(strm);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

691 beg = s->pending;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

692 if (s->pending == s->pending_buf_size) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

693 val = 1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

694 break;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

695 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

696 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

697 val = s->gzhead->name[s->gzindex++];

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

698 put_byte(s, val);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

699 } while (val != 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

700 if (s->gzhead->hcrc && s->pending > beg)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

701 strm->adler = crc32(strm->adler, s->pending_buf + beg,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

702 s->pending - beg);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

703 if (val == 0) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

704 s->gzindex = 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

705 s->status = COMMENT_STATE;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

706 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

707 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

708 else

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

709 s->status = COMMENT_STATE;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

710 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

711 if (s->status == COMMENT_STATE) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

712 if (s->gzhead->comment != NULL) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

713 uInt beg = s->pending; /* start of bytes to update crc */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

714 int val;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

715

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

716 do {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

717 if (s->pending == s->pending_buf_size) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

718 if (s->gzhead->hcrc && s->pending > beg)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

719 strm->adler = crc32(strm->adler, s->pending_buf + beg,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

720 s->pending - beg);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

721 flush_pending(strm);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

722 beg = s->pending;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

723 if (s->pending == s->pending_buf_size) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

724 val = 1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

725 break;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

726 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

727 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

728 val = s->gzhead->comment[s->gzindex++];

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

729 put_byte(s, val);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

730 } while (val != 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

731 if (s->gzhead->hcrc && s->pending > beg)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

732 strm->adler = crc32(strm->adler, s->pending_buf + beg,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

733 s->pending - beg);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

734 if (val == 0)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

735 s->status = HCRC_STATE;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

736 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

737 else

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

738 s->status = HCRC_STATE;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

739 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

740 if (s->status == HCRC_STATE) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

741 if (s->gzhead->hcrc) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

742 if (s->pending + 2 > s->pending_buf_size)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

743 flush_pending(strm);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

744 if (s->pending + 2 <= s->pending_buf_size) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

745 put_byte(s, (Byte)(strm->adler & 0xff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

746 put_byte(s, (Byte)((strm->adler >> 8) & 0xff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

747 strm->adler = crc32(0L, Z_NULL, 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

748 s->status = BUSY_STATE;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

749 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

750 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

751 else

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

752 s->status = BUSY_STATE;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

753 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

754 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

755

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

756 /* Flush as much pending output as possible */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

757 if (s->pending != 0) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

758 flush_pending(strm);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

759 if (strm->avail_out == 0) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

760 /* Since avail_out is 0, deflate will be called again with

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

761 * more output space, but possibly with both pending and

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

762 * avail_in equal to zero. There won't be anything to do,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

763 * but this is not an error situation so make sure we

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

764 * return OK instead of BUF_ERROR at next call of deflate:

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

765 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

766 s->last_flush = -1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

767 return Z_OK;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

768 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

769

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

770 /* Make sure there is something to do and avoid duplicate consecutive

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

771 * flushes. For repeated and useless calls with Z_FINISH, we keep

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

772 * returning Z_STREAM_END instead of Z_BUF_ERROR.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

773 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

774 } else if (strm->avail_in == 0 && flush <= old_flush &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

775 flush != Z_FINISH) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

776 ERR_RETURN(strm, Z_BUF_ERROR);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

777 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

778

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

779 /* User must not provide more input after the first FINISH: */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

780 if (s->status == FINISH_STATE && strm->avail_in != 0) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

781 ERR_RETURN(strm, Z_BUF_ERROR);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

782 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

783

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

784 /* Start a new block or continue the current one.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

785 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

786 if (strm->avail_in != 0 || s->lookahead != 0 ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

787 (flush != Z_NO_FLUSH && s->status != FINISH_STATE)) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

788 block_state bstate;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

789

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

790 bstate = (*(configuration_table[s->level].func))(s, flush);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

791

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

792 if (bstate == finish_started || bstate == finish_done) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

793 s->status = FINISH_STATE;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

794 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

795 if (bstate == need_more || bstate == finish_started) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

796 if (strm->avail_out == 0) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

797 s->last_flush = -1; /* avoid BUF_ERROR next call, see above */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

798 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

799 return Z_OK;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

800 /* If flush != Z_NO_FLUSH && avail_out == 0, the next call

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

801 * of deflate should use the same flush parameter to make sure

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

802 * that the flush is complete. So we don't have to output an

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

803 * empty block here, this will be done at next call. This also

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

804 * ensures that for a very small output buffer, we emit at most

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

805 * one empty block.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

806 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

807 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

808 if (bstate == block_done) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

809 if (flush == Z_PARTIAL_FLUSH) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

810 _tr_align(s);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

811 } else { /* FULL_FLUSH or SYNC_FLUSH */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

812 _tr_stored_block(s, (char*)0, 0L, 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

813 /* For a full flush, this empty block will be recognized

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

814 * as a special marker by inflate_sync().

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

815 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

816 if (flush == Z_FULL_FLUSH) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

817 CLEAR_HASH(s); /* forget history */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

818 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

819 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

820 flush_pending(strm);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

821 if (strm->avail_out == 0) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

822 s->last_flush = -1; /* avoid BUF_ERROR at next call, see above */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

823 return Z_OK;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

824 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

825 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

826 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

827 Assert(strm->avail_out > 0, "bug2");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

828

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

829 if (flush != Z_FINISH) return Z_OK;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

830 if (s->wrap <= 0) return Z_STREAM_END;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

831

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

832 /* Write the trailer */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

833 #ifdef GZIP

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

834 if (s->wrap == 2) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

835 put_byte(s, (Byte)(strm->adler & 0xff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

836 put_byte(s, (Byte)((strm->adler >> 8) & 0xff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

837 put_byte(s, (Byte)((strm->adler >> 16) & 0xff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

838 put_byte(s, (Byte)((strm->adler >> 24) & 0xff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

839 put_byte(s, (Byte)(strm->total_in & 0xff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

840 put_byte(s, (Byte)((strm->total_in >> 8) & 0xff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

841 put_byte(s, (Byte)((strm->total_in >> 16) & 0xff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

842 put_byte(s, (Byte)((strm->total_in >> 24) & 0xff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

843 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

844 else

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

845 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

846 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

847 putShortMSB(s, (uInt)(strm->adler >> 16));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

848 putShortMSB(s, (uInt)(strm->adler & 0xffff));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

849 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

850 flush_pending(strm);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

851 /* If avail_out is zero, the application will call deflate again

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

852 * to flush the rest.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

853 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

854 if (s->wrap > 0) s->wrap = -s->wrap; /* write the trailer only once! */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

855 return s->pending != 0 ? Z_OK : Z_STREAM_END;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

856 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

857

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

858 /* ========================================================================= */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

859 int ZEXPORT deflateEnd (strm)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

860 z_streamp strm;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

861 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

862 int status;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

863

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

864 if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

865

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

866 status = strm->state->status;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

867 if (status != INIT_STATE &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

868 status != EXTRA_STATE &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

869 status != NAME_STATE &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

870 status != COMMENT_STATE &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

871 status != HCRC_STATE &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

872 status != BUSY_STATE &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

873 status != FINISH_STATE) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

874 return Z_STREAM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

875 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

876

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

877 /* Deallocate in reverse order of allocations: */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

878 TRY_FREE(strm, strm->state->pending_buf);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

879 TRY_FREE(strm, strm->state->head);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

880 TRY_FREE(strm, strm->state->prev);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

881 TRY_FREE(strm, strm->state->window);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

882

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

883 ZFREE(strm, strm->state);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

884 strm->state = Z_NULL;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

885

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

886 return status == BUSY_STATE ? Z_DATA_ERROR : Z_OK;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

887 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

888

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

889 /* =========================================================================

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

890 * Copy the source state to the destination state.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

891 * To simplify the source, this is not supported for 16-bit MSDOS (which

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

892 * doesn't have enough memory anyway to duplicate compression states).

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

893 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

894 int ZEXPORT deflateCopy (dest, source)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

895 z_streamp dest;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

896 z_streamp source;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

897 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

898 #ifdef MAXSEG_64K

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

899 return Z_STREAM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

900 #else

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

901 deflate_state *ds;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

902 deflate_state *ss;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

903 ushf *overlay;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

904

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

905

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

906 if (source == Z_NULL || dest == Z_NULL || source->state == Z_NULL) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

907 return Z_STREAM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

908 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

909

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

910 ss = source->state;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

911

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

912 zmemcpy(dest, source, sizeof(z_stream));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

913

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

914 ds = (deflate_state *) ZALLOC(dest, 1, sizeof(deflate_state));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

915 if (ds == Z_NULL) return Z_MEM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

916 dest->state = (struct internal_state FAR *) ds;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

917 zmemcpy(ds, ss, sizeof(deflate_state));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

918 ds->strm = dest;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

919

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

920 ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

921 ds->prev = (Posf *) ZALLOC(dest, ds->w_size, sizeof(Pos));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

922 ds->head = (Posf *) ZALLOC(dest, ds->hash_size, sizeof(Pos));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

923 overlay = (ushf *) ZALLOC(dest, ds->lit_bufsize, sizeof(ush)+2);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

924 ds->pending_buf = (uchf *) overlay;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

925

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

926 if (ds->window == Z_NULL || ds->prev == Z_NULL || ds->head == Z_NULL ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

927 ds->pending_buf == Z_NULL) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

928 deflateEnd (dest);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

929 return Z_MEM_ERROR;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

930 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

931 /* following zmemcpy do not work for 16-bit MSDOS */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

932 zmemcpy(ds->window, ss->window, ds->w_size * 2 * sizeof(Byte));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

933 zmemcpy(ds->prev, ss->prev, ds->w_size * sizeof(Pos));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

934 zmemcpy(ds->head, ss->head, ds->hash_size * sizeof(Pos));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

935 zmemcpy(ds->pending_buf, ss->pending_buf, (uInt)ds->pending_buf_size);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

936

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

937 ds->pending_out = ds->pending_buf + (ss->pending_out - ss->pending_buf);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

938 ds->d_buf = overlay + ds->lit_bufsize/sizeof(ush);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

939 ds->l_buf = ds->pending_buf + (1+sizeof(ush))*ds->lit_bufsize;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

940

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

941 ds->l_desc.dyn_tree = ds->dyn_ltree;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

942 ds->d_desc.dyn_tree = ds->dyn_dtree;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

943 ds->bl_desc.dyn_tree = ds->bl_tree;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

944

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

945 return Z_OK;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

946 #endif /* MAXSEG_64K */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

947 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

948

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

949 /* ===========================================================================

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

950 * Read a new buffer from the current input stream, update the adler32

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

951 * and total number of bytes read. All deflate() input goes through

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

952 * this function so some applications may wish to modify it to avoid

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

953 * allocating a large strm->next_in buffer and copying from it.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

954 * (See also flush_pending()).

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

955 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

956 local int read_buf(strm, buf, size)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

957 z_streamp strm;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

958 Bytef *buf;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

959 unsigned size;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

960 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

961 unsigned len = strm->avail_in;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

962

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

963 if (len > size) len = size;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

964 if (len == 0) return 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

965

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

966 strm->avail_in -= len;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

967

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

968 if (strm->state->wrap == 1) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

969 strm->adler = adler32(strm->adler, strm->next_in, len);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

970 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

971 #ifdef GZIP

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

972 else if (strm->state->wrap == 2) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

973 strm->adler = crc32(strm->adler, strm->next_in, len);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

974 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

975 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

976 zmemcpy(buf, strm->next_in, len);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

977 strm->next_in += len;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

978 strm->total_in += len;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

979

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

980 return (int)len;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

981 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

982

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

983 /* ===========================================================================

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

984 * Initialize the "longest match" routines for a new zlib stream

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

985 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

986 local void lm_init (s)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

987 deflate_state *s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

988 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

989 s->window_size = (ulg)2L*s->w_size;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

990

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

991 CLEAR_HASH(s);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

992

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

993 /* Set the default configuration parameters:

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

994 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

995 s->max_lazy_match = configuration_table[s->level].max_lazy;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

996 s->good_match = configuration_table[s->level].good_length;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

997 s->nice_match = configuration_table[s->level].nice_length;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

998 s->max_chain_length = configuration_table[s->level].max_chain;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

999

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1000 s->strstart = 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1001 s->block_start = 0L;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1002 s->lookahead = 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1003 s->match_length = s->prev_length = MIN_MATCH-1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1004 s->match_available = 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1005 s->ins_h = 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1006 #ifndef FASTEST

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1007 #ifdef ASMV

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1008 match_init(); /* initialize the asm code */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1009 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1010 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1011 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1012

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1013 #ifndef FASTEST

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1014 /* ===========================================================================

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1015 * Set match_start to the longest match starting at the given string and

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1016 * return its length. Matches shorter or equal to prev_length are discarded,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1017 * in which case the result is equal to prev_length and match_start is

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1018 * garbage.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1019 * IN assertions: cur_match is the head of the hash chain for the current

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1020 * string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1021 * OUT assertion: the match length is not greater than s->lookahead.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1022 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1023 #ifndef ASMV

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1024 /* For 80x86 and 680x0, an optimized version will be provided in match.asm or

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1025 * match.S. The code will be functionally equivalent.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1026 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1027 local uInt longest_match(s, cur_match)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1028 deflate_state *s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1029 IPos cur_match; /* current match */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1030 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1031 unsigned chain_length = s->max_chain_length;/* max hash chain length */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1032 register Bytef *scan = s->window + s->strstart; /* current string */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1033 register Bytef *match; /* matched string */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1034 register int len; /* length of current match */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1035 int best_len = s->prev_length; /* best match length so far */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1036 int nice_match = s->nice_match; /* stop if match long enough */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1037 IPos limit = s->strstart > (IPos)MAX_DIST(s) ?

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1038 s->strstart - (IPos)MAX_DIST(s) : NIL;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1039 /* Stop when cur_match becomes <= limit. To simplify the code,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1040 * we prevent matches with the string of window index 0.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1041 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1042 Posf *prev = s->prev;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1043 uInt wmask = s->w_mask;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1044

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1045 #ifdef UNALIGNED_OK

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1046 /* Compare two bytes at a time. Note: this is not always beneficial.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1047 * Try with and without -DUNALIGNED_OK to check.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1048 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1049 register Bytef *strend = s->window + s->strstart + MAX_MATCH - 1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1050 register ush scan_start = *(ushf*)scan;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1051 register ush scan_end = *(ushf*)(scan+best_len-1);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1052 #else

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1053 register Bytef *strend = s->window + s->strstart + MAX_MATCH;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1054 register Byte scan_end1 = scan[best_len-1];

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1055 register Byte scan_end = scan[best_len];

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1056 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1057

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1058 /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1059 * It is easy to get rid of this optimization if necessary.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1060 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1061 Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1062

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1063 /* Do not waste too much time if we already have a good match: */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1064 if (s->prev_length >= s->good_match) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1065 chain_length >>= 2;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1066 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1067 /* Do not look for matches beyond the end of the input. This is necessary

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1068 * to make deflate deterministic.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1069 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1070 if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1071

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1072 Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1073

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1074 do {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1075 Assert(cur_match < s->strstart, "no future");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1076 match = s->window + cur_match;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1077

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1078 /* Skip to next match if the match length cannot increase

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1079 * or if the match length is less than 2. Note that the checks below

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1080 * for insufficient lookahead only occur occasionally for performance

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1081 * reasons. Therefore uninitialized memory will be accessed, and

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1082 * conditional jumps will be made that depend on those values.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1083 * However the length of the match is limited to the lookahead, so

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1084 * the output of deflate is not affected by the uninitialized values.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1085 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1086 #if (defined(UNALIGNED_OK) && MAX_MATCH == 258)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1087 /* This code assumes sizeof(unsigned short) == 2. Do not use

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1088 * UNALIGNED_OK if your compiler uses a different size.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1089 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1090 if (*(ushf*)(match+best_len-1) != scan_end ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1091 *(ushf*)match != scan_start) continue;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1092

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1093 /* It is not necessary to compare scan[2] and match[2] since they are

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1094 * always equal when the other bytes match, given that the hash keys

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1095 * are equal and that HASH_BITS >= 8. Compare 2 bytes at a time at

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1096 * strstart+3, +5, ... up to strstart+257. We check for insufficient

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1097 * lookahead only every 4th comparison; the 128th check will be made

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1098 * at strstart+257. If MAX_MATCH-2 is not a multiple of 8, it is

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1099 * necessary to put more guard bytes at the end of the window, or

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1100 * to check more often for insufficient lookahead.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1101 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1102 Assert(scan[2] == match[2], "scan[2]?");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1103 scan++, match++;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1104 do {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1105 } while (*(ushf*)(scan+=2) == *(ushf*)(match+=2) &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1106 *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1107 *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1108 *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1109 scan < strend);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1110 /* The funny "do {}" generates better code on most compilers */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1111

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1112 /* Here, scan <= window+strstart+257 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1113 Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1114 if (*scan == *match) scan++;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1115

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1116 len = (MAX_MATCH - 1) - (int)(strend-scan);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1117 scan = strend - (MAX_MATCH-1);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1118

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1119 #else /* UNALIGNED_OK */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1120

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1121 if (match[best_len] != scan_end ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1122 match[best_len-1] != scan_end1 ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1123 *match != *scan ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1124 *++match != scan[1]) continue;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1125

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1126 /* The check at best_len-1 can be removed because it will be made

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1127 * again later. (This heuristic is not always a win.)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1128 * It is not necessary to compare scan[2] and match[2] since they

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1129 * are always equal when the other bytes match, given that

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1130 * the hash keys are equal and that HASH_BITS >= 8.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1131 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1132 scan += 2, match++;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1133 Assert(*scan == *match, "match[2]?");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1134

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1135 /* We check for insufficient lookahead only every 8th comparison;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1136 * the 256th check will be made at strstart+258.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1137 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1138 do {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1139 } while (*++scan == *++match && *++scan == *++match &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1140 *++scan == *++match && *++scan == *++match &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1141 *++scan == *++match && *++scan == *++match &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1142 *++scan == *++match && *++scan == *++match &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1143 scan < strend);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1144

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1145 Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1146

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1147 len = MAX_MATCH - (int)(strend - scan);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1148 scan = strend - MAX_MATCH;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1149

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1150 #endif /* UNALIGNED_OK */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1151

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1152 if (len > best_len) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1153 s->match_start = cur_match;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1154 best_len = len;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1155 if (len >= nice_match) break;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1156 #ifdef UNALIGNED_OK

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1157 scan_end = *(ushf*)(scan+best_len-1);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1158 #else

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1159 scan_end1 = scan[best_len-1];

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1160 scan_end = scan[best_len];

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1161 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1162 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1163 } while ((cur_match = prev[cur_match & wmask]) > limit

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1164 && --chain_length != 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1165

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1166 if ((uInt)best_len <= s->lookahead) return (uInt)best_len;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1167 return s->lookahead;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1168 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1169 #endif /* ASMV */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1170 #endif /* FASTEST */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1171

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1172 /* ---------------------------------------------------------------------------

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1173 * Optimized version for level == 1 or strategy == Z_RLE only

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1174 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1175 local uInt longest_match_fast(s, cur_match)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1176 deflate_state *s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1177 IPos cur_match; /* current match */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1178 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1179 register Bytef *scan = s->window + s->strstart; /* current string */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1180 register Bytef *match; /* matched string */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1181 register int len; /* length of current match */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1182 register Bytef *strend = s->window + s->strstart + MAX_MATCH;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1183

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1184 /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1185 * It is easy to get rid of this optimization if necessary.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1186 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1187 Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1188

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1189 Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1190

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1191 Assert(cur_match < s->strstart, "no future");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1192

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1193 match = s->window + cur_match;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1194

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1195 /* Return failure if the match length is less than 2:

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1196 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1197 if (match[0] != scan[0] || match[1] != scan[1]) return MIN_MATCH-1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1198

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1199 /* The check at best_len-1 can be removed because it will be made

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1200 * again later. (This heuristic is not always a win.)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1201 * It is not necessary to compare scan[2] and match[2] since they

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1202 * are always equal when the other bytes match, given that

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1203 * the hash keys are equal and that HASH_BITS >= 8.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1204 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1205 scan += 2, match += 2;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1206 Assert(*scan == *match, "match[2]?");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1207

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1208 /* We check for insufficient lookahead only every 8th comparison;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1209 * the 256th check will be made at strstart+258.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1210 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1211 do {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1212 } while (*++scan == *++match && *++scan == *++match &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1213 *++scan == *++match && *++scan == *++match &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1214 *++scan == *++match && *++scan == *++match &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1215 *++scan == *++match && *++scan == *++match &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1216 scan < strend);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1217

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1218 Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1219

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1220 len = MAX_MATCH - (int)(strend - scan);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1221

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1222 if (len < MIN_MATCH) return MIN_MATCH - 1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1223

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1224 s->match_start = cur_match;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1225 return (uInt)len <= s->lookahead ? (uInt)len : s->lookahead;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1226 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1227

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1228 #ifdef DEBUG

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1229 /* ===========================================================================

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1230 * Check that the match at match_start is indeed a match.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1231 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1232 local void check_match(s, start, match, length)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1233 deflate_state *s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1234 IPos start, match;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1235 int length;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1236 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1237 /* check that the match is indeed a match */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1238 if (zmemcmp(s->window + match,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1239 s->window + start, length) != EQUAL) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1240 fprintf(stderr, " start %u, match %u, length %d\n",

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1241 start, match, length);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1242 do {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1243 fprintf(stderr, "%c%c", s->window[match++], s->window[start++]);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1244 } while (--length != 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1245 z_error("invalid match");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1246 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1247 if (z_verbose > 1) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1248 fprintf(stderr,"\\[%d,%d]", start-match, length);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1249 do { putc(s->window[start++], stderr); } while (--length != 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1250 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1251 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1252 #else

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1253 # define check_match(s, start, match, length)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1254 #endif /* DEBUG */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1255

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1256 /* ===========================================================================

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1257 * Fill the window when the lookahead becomes insufficient.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1258 * Updates strstart and lookahead.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1259 *

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1260 * IN assertion: lookahead < MIN_LOOKAHEAD

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1261 * OUT assertions: strstart <= window_size-MIN_LOOKAHEAD

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1262 * At least one byte has been read, or avail_in == 0; reads are

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1263 * performed for at least two bytes (required for the zip translate_eol

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1264 * option -- not supported here).

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1265 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1266 local void fill_window(s)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1267 deflate_state *s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1268 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1269 register unsigned n, m;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1270 register Posf *p;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1271 unsigned more; /* Amount of free space at the end of the window. */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1272 uInt wsize = s->w_size;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1273

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1274 do {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1275 more = (unsigned)(s->window_size -(ulg)s->lookahead -(ulg)s->strstart);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1276

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1277 /* Deal with !@#$% 64K limit: */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1278 if (sizeof(int) <= 2) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1279 if (more == 0 && s->strstart == 0 && s->lookahead == 0) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1280 more = wsize;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1281

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1282 } else if (more == (unsigned)(-1)) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1283 /* Very unlikely, but possible on 16 bit machine if

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1284 * strstart == 0 && lookahead == 1 (input done a byte at time)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1285 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1286 more--;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1287 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1288 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1289

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1290 /* If the window is almost full and there is insufficient lookahead,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1291 * move the upper half to the lower one to make room in the upper half.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1292 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1293 if (s->strstart >= wsize+MAX_DIST(s)) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1294

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1295 zmemcpy(s->window, s->window+wsize, (unsigned)wsize);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1296 s->match_start -= wsize;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1297 s->strstart -= wsize; /* we now have strstart >= MAX_DIST */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1298 s->block_start -= (long) wsize;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1299

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1300 /* Slide the hash table (could be avoided with 32 bit values

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1301 at the expense of memory usage). We slide even when level == 0

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1302 to keep the hash table consistent if we switch back to level > 0

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1303 later. (Using level 0 permanently is not an optimal usage of

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1304 zlib, so we don't care about this pathological case.)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1305 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1306 /* %%% avoid this when Z_RLE */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1307 n = s->hash_size;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1308 p = &s->head[n];

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1309 do {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1310 m = *--p;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1311 *p = (Pos)(m >= wsize ? m-wsize : NIL);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1312 } while (--n);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1313

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1314 n = wsize;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1315 #ifndef FASTEST

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1316 p = &s->prev[n];

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1317 do {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1318 m = *--p;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1319 *p = (Pos)(m >= wsize ? m-wsize : NIL);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1320 /* If n is not on any hash chain, prev[n] is garbage but

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1321 * its value will never be used.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1322 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1323 } while (--n);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1324 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1325 more += wsize;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1326 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1327 if (s->strm->avail_in == 0) return;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1328

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1329 /* If there was no sliding:

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1330 * strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1331 * more == window_size - lookahead - strstart

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1332 * => more >= window_size - (MIN_LOOKAHEAD-1 + WSIZE + MAX_DIST-1)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1333 * => more >= window_size - 2*WSIZE + 2

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1334 * In the BIG_MEM or MMAP case (not yet supported),

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1335 * window_size == input_size + MIN_LOOKAHEAD &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1336 * strstart + s->lookahead <= input_size => more >= MIN_LOOKAHEAD.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1337 * Otherwise, window_size == 2*WSIZE so more >= 2.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1338 * If there was sliding, more >= WSIZE. So in all cases, more >= 2.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1339 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1340 Assert(more >= 2, "more < 2");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1341

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1342 n = read_buf(s->strm, s->window + s->strstart + s->lookahead, more);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1343 s->lookahead += n;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1344

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1345 /* Initialize the hash value now that we have some input: */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1346 if (s->lookahead >= MIN_MATCH) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1347 s->ins_h = s->window[s->strstart];

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1348 UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1349 #if MIN_MATCH != 3

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1350 Call UPDATE_HASH() MIN_MATCH-3 more times

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1351 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1352 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1353 /* If the whole input has less than MIN_MATCH bytes, ins_h is garbage,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1354 * but this is not important since only literal bytes will be emitted.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1355 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1356

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1357 } while (s->lookahead < MIN_LOOKAHEAD && s->strm->avail_in != 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1358 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1359

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1360 /* ===========================================================================

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1361 * Flush the current block, with given end-of-file flag.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1362 * IN assertion: strstart is set to the end of the current match.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1363 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1364 #define FLUSH_BLOCK_ONLY(s, eof) { \

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1365 _tr_flush_block(s, (s->block_start >= 0L ? \

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1366 (charf *)&s->window[(unsigned)s->block_start] : \

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1367 (charf *)Z_NULL), \

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1368 (ulg)((long)s->strstart - s->block_start), \

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1369 (eof)); \

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1370 s->block_start = s->strstart; \

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1371 flush_pending(s->strm); \

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1372 Tracev((stderr,"[FLUSH]")); \

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1373 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1374

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1375 /* Same but force premature exit if necessary. */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1376 #define FLUSH_BLOCK(s, eof) { \

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1377 FLUSH_BLOCK_ONLY(s, eof); \

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1378 if (s->strm->avail_out == 0) return (eof) ? finish_started : need_more; \

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1379 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1380

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1381 /* ===========================================================================

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1382 * Copy without compression as much as possible from the input stream, return

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1383 * the current block state.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1384 * This function does not insert new strings in the dictionary since

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1385 * uncompressible data is probably not useful. This function is used

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1386 * only for the level=0 compression option.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1387 * NOTE: this function should be optimized to avoid extra copying from

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1388 * window to pending_buf.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1389 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1390 local block_state deflate_stored(s, flush)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1391 deflate_state *s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1392 int flush;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1393 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1394 /* Stored blocks are limited to 0xffff bytes, pending_buf is limited

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1395 * to pending_buf_size, and each stored block has a 5 byte header:

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1396 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1397 ulg max_block_size = 0xffff;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1398 ulg max_start;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1399

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1400 if (max_block_size > s->pending_buf_size - 5) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1401 max_block_size = s->pending_buf_size - 5;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1402 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1403

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1404 /* Copy as much as possible from input to output: */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1405 for (;;) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1406 /* Fill the window as much as possible: */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1407 if (s->lookahead <= 1) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1408

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1409 Assert(s->strstart < s->w_size+MAX_DIST(s) ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1410 s->block_start >= (long)s->w_size, "slide too late");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1411

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1412 fill_window(s);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1413 if (s->lookahead == 0 && flush == Z_NO_FLUSH) return need_more;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1414

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1415 if (s->lookahead == 0) break; /* flush the current block */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1416 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1417 Assert(s->block_start >= 0L, "block gone");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1418

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1419 s->strstart += s->lookahead;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1420 s->lookahead = 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1421

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1422 /* Emit a stored block if pending_buf will be full: */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1423 max_start = s->block_start + max_block_size;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1424 if (s->strstart == 0 || (ulg)s->strstart >= max_start) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1425 /* strstart == 0 is possible when wraparound on 16-bit machine */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1426 s->lookahead = (uInt)(s->strstart - max_start);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1427 s->strstart = (uInt)max_start;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1428 FLUSH_BLOCK(s, 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1429 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1430 /* Flush if we may have to slide, otherwise block_start may become

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1431 * negative and the data will be gone:

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1432 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1433 if (s->strstart - (uInt)s->block_start >= MAX_DIST(s)) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1434 FLUSH_BLOCK(s, 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1435 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1436 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1437 FLUSH_BLOCK(s, flush == Z_FINISH);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1438 return flush == Z_FINISH ? finish_done : block_done;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1439 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1440

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1441 /* ===========================================================================

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1442 * Compress as much as possible from the input stream, return the current

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1443 * block state.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1444 * This function does not perform lazy evaluation of matches and inserts

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1445 * new strings in the dictionary only for unmatched strings or for short

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1446 * matches. It is used only for the fast compression options.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1447 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1448 local block_state deflate_fast(s, flush)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1449 deflate_state *s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1450 int flush;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1451 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1452 IPos hash_head = NIL; /* head of the hash chain */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1453 int bflush; /* set if current block must be flushed */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1454

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1455 for (;;) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1456 /* Make sure that we always have enough lookahead, except

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1457 * at the end of the input file. We need MAX_MATCH bytes

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1458 * for the next match, plus MIN_MATCH bytes to insert the

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1459 * string following the next match.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1460 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1461 if (s->lookahead < MIN_LOOKAHEAD) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1462 fill_window(s);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1463 if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1464 return need_more;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1465 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1466 if (s->lookahead == 0) break; /* flush the current block */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1467 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1468

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1469 /* Insert the string window[strstart .. strstart+2] in the

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1470 * dictionary, and set hash_head to the head of the hash chain:

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1471 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1472 if (s->lookahead >= MIN_MATCH) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1473 INSERT_STRING(s, s->strstart, hash_head);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1474 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1475

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1476 /* Find the longest match, discarding those <= prev_length.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1477 * At this point we have always match_length < MIN_MATCH

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1478 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1479 if (hash_head != NIL && s->strstart - hash_head <= MAX_DIST(s)) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1480 /* To simplify the code, we prevent matches with the string

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1481 * of window index 0 (in particular we have to avoid a match

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1482 * of the string with itself at the start of the input file).

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1483 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1484 #ifdef FASTEST

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1485 if ((s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) ||

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1486 (s->strategy == Z_RLE && s->strstart - hash_head == 1)) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1487 s->match_length = longest_match_fast (s, hash_head);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1488 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1489 #else

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1490 if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1491 s->match_length = longest_match (s, hash_head);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1492 } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1493 s->match_length = longest_match_fast (s, hash_head);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1494 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1495 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1496 /* longest_match() or longest_match_fast() sets match_start */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1497 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1498 if (s->match_length >= MIN_MATCH) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1499 check_match(s, s->strstart, s->match_start, s->match_length);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1500

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1501 _tr_tally_dist(s, s->strstart - s->match_start,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1502 s->match_length - MIN_MATCH, bflush);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1503

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1504 s->lookahead -= s->match_length;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1505

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1506 /* Insert new strings in the hash table only if the match length

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1507 * is not too large. This saves time but degrades compression.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1508 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1509 #ifndef FASTEST

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1510 if (s->match_length <= s->max_insert_length &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1511 s->lookahead >= MIN_MATCH) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1512 s->match_length--; /* string at strstart already in table */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1513 do {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1514 s->strstart++;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1515 INSERT_STRING(s, s->strstart, hash_head);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1516 /* strstart never exceeds WSIZE-MAX_MATCH, so there are

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1517 * always MIN_MATCH bytes ahead.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1518 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1519 } while (--s->match_length != 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1520 s->strstart++;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1521 } else

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1522 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1523 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1524 s->strstart += s->match_length;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1525 s->match_length = 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1526 s->ins_h = s->window[s->strstart];

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1527 UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1528 #if MIN_MATCH != 3

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1529 Call UPDATE_HASH() MIN_MATCH-3 more times

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1530 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1531 /* If lookahead < MIN_MATCH, ins_h is garbage, but it does not

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1532 * matter since it will be recomputed at next deflate call.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1533 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1534 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1535 } else {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1536 /* No match, output a literal byte */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1537 Tracevv((stderr,"%c", s->window[s->strstart]));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1538 _tr_tally_lit (s, s->window[s->strstart], bflush);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1539 s->lookahead--;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1540 s->strstart++;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1541 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1542 if (bflush) FLUSH_BLOCK(s, 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1543 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1544 FLUSH_BLOCK(s, flush == Z_FINISH);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1545 return flush == Z_FINISH ? finish_done : block_done;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1546 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1547

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1548 #ifndef FASTEST

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1549 /* ===========================================================================

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1550 * Same as above, but achieves better compression. We use a lazy

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1551 * evaluation for matches: a match is finally adopted only if there is

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1552 * no better match at the next window position.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1553 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1554 local block_state deflate_slow(s, flush)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1555 deflate_state *s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1556 int flush;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1557 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1558 IPos hash_head = NIL; /* head of hash chain */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1559 int bflush; /* set if current block must be flushed */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1560

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1561 /* Process the input block. */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1562 for (;;) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1563 /* Make sure that we always have enough lookahead, except

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1564 * at the end of the input file. We need MAX_MATCH bytes

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1565 * for the next match, plus MIN_MATCH bytes to insert the

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1566 * string following the next match.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1567 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1568 if (s->lookahead < MIN_LOOKAHEAD) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1569 fill_window(s);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1570 if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1571 return need_more;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1572 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1573 if (s->lookahead == 0) break; /* flush the current block */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1574 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1575

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1576 /* Insert the string window[strstart .. strstart+2] in the

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1577 * dictionary, and set hash_head to the head of the hash chain:

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1578 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1579 if (s->lookahead >= MIN_MATCH) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1580 INSERT_STRING(s, s->strstart, hash_head);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1581 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1582

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1583 /* Find the longest match, discarding those <= prev_length.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1584 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1585 s->prev_length = s->match_length, s->prev_match = s->match_start;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1586 s->match_length = MIN_MATCH-1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1587

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1588 if (hash_head != NIL && s->prev_length < s->max_lazy_match &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1589 s->strstart - hash_head <= MAX_DIST(s)) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1590 /* To simplify the code, we prevent matches with the string

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1591 * of window index 0 (in particular we have to avoid a match

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1592 * of the string with itself at the start of the input file).

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1593 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1594 if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1595 s->match_length = longest_match (s, hash_head);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1596 } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1597 s->match_length = longest_match_fast (s, hash_head);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1598 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1599 /* longest_match() or longest_match_fast() sets match_start */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1600

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1601 if (s->match_length <= 5 && (s->strategy == Z_FILTERED

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1602 #if TOO_FAR <= 32767

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1603 || (s->match_length == MIN_MATCH &&

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1604 s->strstart - s->match_start > TOO_FAR)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1605 #endif

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1606 )) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1607

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1608 /* If prev_match is also MIN_MATCH, match_start is garbage

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1609 * but we will ignore the current match anyway.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1610 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1611 s->match_length = MIN_MATCH-1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1612 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1613 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1614 /* If there was a match at the previous step and the current

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1615 * match is not better, output the previous match:

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1616 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1617 if (s->prev_length >= MIN_MATCH && s->match_length <= s->prev_length) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1618 uInt max_insert = s->strstart + s->lookahead - MIN_MATCH;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1619 /* Do not insert strings in hash table beyond this. */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1620

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1621 check_match(s, s->strstart-1, s->prev_match, s->prev_length);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1622

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1623 _tr_tally_dist(s, s->strstart -1 - s->prev_match,

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1624 s->prev_length - MIN_MATCH, bflush);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1625

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1626 /* Insert in hash table all strings up to the end of the match.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1627 * strstart-1 and strstart are already inserted. If there is not

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1628 * enough lookahead, the last two strings are not inserted in

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1629 * the hash table.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1630 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1631 s->lookahead -= s->prev_length-1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1632 s->prev_length -= 2;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1633 do {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1634 if (++s->strstart <= max_insert) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1635 INSERT_STRING(s, s->strstart, hash_head);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1636 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1637 } while (--s->prev_length != 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1638 s->match_available = 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1639 s->match_length = MIN_MATCH-1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1640 s->strstart++;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1641

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1642 if (bflush) FLUSH_BLOCK(s, 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1643

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1644 } else if (s->match_available) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1645 /* If there was no match at the previous position, output a

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1646 * single literal. If there was a match but the current match

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1647 * is longer, truncate the previous match to a single literal.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1648 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1649 Tracevv((stderr,"%c", s->window[s->strstart-1]));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1650 _tr_tally_lit(s, s->window[s->strstart-1], bflush);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1651 if (bflush) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1652 FLUSH_BLOCK_ONLY(s, 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1653 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1654 s->strstart++;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1655 s->lookahead--;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1656 if (s->strm->avail_out == 0) return need_more;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1657 } else {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1658 /* There is no previous match to compare with, wait for

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1659 * the next step to decide.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1660 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1661 s->match_available = 1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1662 s->strstart++;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1663 s->lookahead--;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1664 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1665 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1666 Assert (flush != Z_NO_FLUSH, "no flush?");

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1667 if (s->match_available) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1668 Tracevv((stderr,"%c", s->window[s->strstart-1]));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1669 _tr_tally_lit(s, s->window[s->strstart-1], bflush);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1670 s->match_available = 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1671 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1672 FLUSH_BLOCK(s, flush == Z_FINISH);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1673 return flush == Z_FINISH ? finish_done : block_done;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1674 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1675 #endif /* FASTEST */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1676

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1677 #if 0

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1678 /* ===========================================================================

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1679 * For Z_RLE, simply look for runs of bytes, generate matches only of distance

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1680 * one. Do not maintain a hash table. (It will be regenerated if this run of

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1681 * deflate switches away from Z_RLE.)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1682 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1683 local block_state deflate_rle(s, flush)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1684 deflate_state *s;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1685 int flush;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1686 {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1687 int bflush; /* set if current block must be flushed */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1688 uInt run; /* length of run */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1689 uInt max; /* maximum length of run */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1690 uInt prev; /* byte at distance one to match */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1691 Bytef *scan; /* scan for end of run */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1692

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1693 for (;;) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1694 /* Make sure that we always have enough lookahead, except

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1695 * at the end of the input file. We need MAX_MATCH bytes

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1696 * for the longest encodable run.

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1697 */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1698 if (s->lookahead < MAX_MATCH) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1699 fill_window(s);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1700 if (s->lookahead < MAX_MATCH && flush == Z_NO_FLUSH) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1701 return need_more;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1702 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1703 if (s->lookahead == 0) break; /* flush the current block */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1704 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1705

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1706 /* See how many times the previous byte repeats */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1707 run = 0;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1708 if (s->strstart > 0) { /* if there is a previous byte, that is */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1709 max = s->lookahead < MAX_MATCH ? s->lookahead : MAX_MATCH;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1710 scan = s->window + s->strstart - 1;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1711 prev = *scan++;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1712 do {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1713 if (*scan++ != prev)

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1714 break;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1715 } while (++run < max);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1716 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1717

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1718 /* Emit match if have run of MIN_MATCH or longer, else emit literal */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1719 if (run >= MIN_MATCH) {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1720 check_match(s, s->strstart, s->strstart - 1, run);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1721 _tr_tally_dist(s, 1, run - MIN_MATCH, bflush);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1722 s->lookahead -= run;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1723 s->strstart += run;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1724 } else {

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1725 /* No match, output a literal byte */

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1726 Tracevv((stderr,"%c", s->window[s->strstart]));

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1727 _tr_tally_lit (s, s->window[s->strstart], bflush);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1728 s->lookahead--;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1729 s->strstart++;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1730 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1731 if (bflush) FLUSH_BLOCK(s, 0);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1732 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1733 FLUSH_BLOCK(s, flush == Z_FINISH);

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1734 return flush == Z_FINISH ? finish_done : block_done;

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1735 }

ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.

kent <kent@cr.ie.u-ryukyu.ac.jp>

parents:

diff changeset

1736 #endif

Mercurial > hg > CbC > CbC_gcc

annotate zlib/deflate.c @ 51:ae3a4bfb450b