Mercurial > hg > CbC > CbC_gcc

annotate zlib/contrib/dotzlib/DotZLib/Deflater.cs @ 51:ae3a4bfb450b

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add some files of version 4.4.3 that have been forgotten.
author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Sun, 07 Feb 2010 18:27:48 +0900
parents
children 04ced10e8804
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51
ae3a4bfb450b add some files of version 4.4.3 that have been forgotten.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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1 //
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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2 // © Copyright Henrik Ravn 2004
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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3 //
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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4 // Use, modification and distribution are subject to the Boost Software License, Version 1.0.
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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5 // (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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6 //
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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7
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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8 using System;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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9 using System.Diagnostics;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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10 using System.Runtime.InteropServices;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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11
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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12 namespace DotZLib
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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13 {
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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14
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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15 /// <summary>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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16 /// Implements a data compressor, using the deflate algorithm in the ZLib dll
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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17 /// </summary>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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18 public sealed class Deflater : CodecBase
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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19 {
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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20 #region Dll imports
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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21 [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)]
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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22 private static extern int deflateInit_(ref ZStream sz, int level, string vs, int size);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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23
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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24 [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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25 private static extern int deflate(ref ZStream sz, int flush);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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26
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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27 [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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28 private static extern int deflateReset(ref ZStream sz);
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29
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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30 [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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31 private static extern int deflateEnd(ref ZStream sz);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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32 #endregion
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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33
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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34 /// <summary>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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35 /// Constructs an new instance of the <c>Deflater</c>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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36 /// </summary>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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37 /// <param name="level">The compression level to use for this <c>Deflater</c></param>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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38 public Deflater(CompressLevel level) : base()
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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39 {
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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40 int retval = deflateInit_(ref _ztream, (int)level, Info.Version, Marshal.SizeOf(_ztream));
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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41 if (retval != 0)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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42 throw new ZLibException(retval, "Could not initialize deflater");
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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43
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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44 resetOutput();
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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45 }
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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46
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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47 /// <summary>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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48 /// Adds more data to the codec to be processed.
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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49 /// </summary>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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50 /// <param name="data">Byte array containing the data to be added to the codec</param>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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51 /// <param name="offset">The index of the first byte to add from <c>data</c></param>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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52 /// <param name="count">The number of bytes to add</param>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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53 /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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54 public override void Add(byte[] data, int offset, int count)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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55 {
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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56 if (data == null) throw new ArgumentNullException();
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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57 if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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58 if ((offset+count) > data.Length) throw new ArgumentException();
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59
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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60 int total = count;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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61 int inputIndex = offset;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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62 int err = 0;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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63
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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64 while (err >= 0 && inputIndex < total)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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65 {
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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66 copyInput(data, inputIndex, Math.Min(total - inputIndex, kBufferSize));
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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67 while (err >= 0 && _ztream.avail_in > 0)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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68 {
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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69 err = deflate(ref _ztream, (int)FlushTypes.None);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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70 if (err == 0)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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71 while (_ztream.avail_out == 0)
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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72 {
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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73 OnDataAvailable();
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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74 err = deflate(ref _ztream, (int)FlushTypes.None);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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75 }
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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76 inputIndex += (int)_ztream.total_in;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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77 }
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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78 }
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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79 setChecksum( _ztream.adler );
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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80 }
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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81
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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82
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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83 /// <summary>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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84 /// Finishes up any pending data that needs to be processed and handled.
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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85 /// </summary>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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86 public override void Finish()
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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87 {
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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88 int err;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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89 do
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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90 {
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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91 err = deflate(ref _ztream, (int)FlushTypes.Finish);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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92 OnDataAvailable();
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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93 }
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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94 while (err == 0);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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95 setChecksum( _ztream.adler );
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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96 deflateReset(ref _ztream);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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97 resetOutput();
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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98 }
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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99
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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100 /// <summary>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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101 /// Closes the internal zlib deflate stream
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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102 /// </summary>
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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103 protected override void CleanUp() { deflateEnd(ref _ztream); }
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104
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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105 }
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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106 }