Mercurial > hg > CbC > CbC_gcc
annotate zlib/contrib/delphi/ZLib.pas @ 51:ae3a4bfb450b
add some files of version 4.4.3 that have been forgotten.
author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
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date | Sun, 07 Feb 2010 18:27:48 +0900 |
parents | |
children | 04ced10e8804 |
rev | line source |
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51
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1 {*******************************************************} |
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2 { } |
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3 { Borland Delphi Supplemental Components } |
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4 { ZLIB Data Compression Interface Unit } |
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5 { } |
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6 { Copyright (c) 1997,99 Borland Corporation } |
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7 { } |
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8 {*******************************************************} |
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9 |
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10 { Updated for zlib 1.2.x by Cosmin Truta <cosmint@cs.ubbcluj.ro> } |
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11 |
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12 unit ZLib; |
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13 |
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14 interface |
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15 |
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16 uses SysUtils, Classes; |
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17 |
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18 type |
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19 TAlloc = function (AppData: Pointer; Items, Size: Integer): Pointer; cdecl; |
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20 TFree = procedure (AppData, Block: Pointer); cdecl; |
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21 |
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22 // Internal structure. Ignore. |
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23 TZStreamRec = packed record |
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24 next_in: PChar; // next input byte |
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25 avail_in: Integer; // number of bytes available at next_in |
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26 total_in: Longint; // total nb of input bytes read so far |
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27 |
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28 next_out: PChar; // next output byte should be put here |
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29 avail_out: Integer; // remaining free space at next_out |
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30 total_out: Longint; // total nb of bytes output so far |
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31 |
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32 msg: PChar; // last error message, NULL if no error |
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33 internal: Pointer; // not visible by applications |
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34 |
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35 zalloc: TAlloc; // used to allocate the internal state |
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36 zfree: TFree; // used to free the internal state |
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37 AppData: Pointer; // private data object passed to zalloc and zfree |
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38 |
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39 data_type: Integer; // best guess about the data type: ascii or binary |
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40 adler: Longint; // adler32 value of the uncompressed data |
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41 reserved: Longint; // reserved for future use |
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42 end; |
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43 |
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44 // Abstract ancestor class |
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45 TCustomZlibStream = class(TStream) |
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46 private |
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47 FStrm: TStream; |
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48 FStrmPos: Integer; |
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49 FOnProgress: TNotifyEvent; |
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50 FZRec: TZStreamRec; |
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51 FBuffer: array [Word] of Char; |
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52 protected |
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53 procedure Progress(Sender: TObject); dynamic; |
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54 property OnProgress: TNotifyEvent read FOnProgress write FOnProgress; |
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55 constructor Create(Strm: TStream); |
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56 end; |
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57 |
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58 { TCompressionStream compresses data on the fly as data is written to it, and |
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59 stores the compressed data to another stream. |
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60 |
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61 TCompressionStream is write-only and strictly sequential. Reading from the |
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62 stream will raise an exception. Using Seek to move the stream pointer |
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63 will raise an exception. |
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64 |
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65 Output data is cached internally, written to the output stream only when |
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66 the internal output buffer is full. All pending output data is flushed |
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67 when the stream is destroyed. |
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68 |
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69 The Position property returns the number of uncompressed bytes of |
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70 data that have been written to the stream so far. |
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71 |
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72 CompressionRate returns the on-the-fly percentage by which the original |
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73 data has been compressed: (1 - (CompressedBytes / UncompressedBytes)) * 100 |
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74 If raw data size = 100 and compressed data size = 25, the CompressionRate |
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75 is 75% |
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76 |
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77 The OnProgress event is called each time the output buffer is filled and |
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78 written to the output stream. This is useful for updating a progress |
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79 indicator when you are writing a large chunk of data to the compression |
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80 stream in a single call.} |
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81 |
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82 |
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83 TCompressionLevel = (clNone, clFastest, clDefault, clMax); |
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84 |
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85 TCompressionStream = class(TCustomZlibStream) |
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86 private |
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87 function GetCompressionRate: Single; |
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88 public |
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89 constructor Create(CompressionLevel: TCompressionLevel; Dest: TStream); |
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90 destructor Destroy; override; |
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91 function Read(var Buffer; Count: Longint): Longint; override; |
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92 function Write(const Buffer; Count: Longint): Longint; override; |
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93 function Seek(Offset: Longint; Origin: Word): Longint; override; |
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94 property CompressionRate: Single read GetCompressionRate; |
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95 property OnProgress; |
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96 end; |
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97 |
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98 { TDecompressionStream decompresses data on the fly as data is read from it. |
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99 |
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100 Compressed data comes from a separate source stream. TDecompressionStream |
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101 is read-only and unidirectional; you can seek forward in the stream, but not |
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102 backwards. The special case of setting the stream position to zero is |
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103 allowed. Seeking forward decompresses data until the requested position in |
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104 the uncompressed data has been reached. Seeking backwards, seeking relative |
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105 to the end of the stream, requesting the size of the stream, and writing to |
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106 the stream will raise an exception. |
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107 |
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108 The Position property returns the number of bytes of uncompressed data that |
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109 have been read from the stream so far. |
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110 |
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111 The OnProgress event is called each time the internal input buffer of |
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112 compressed data is exhausted and the next block is read from the input stream. |
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113 This is useful for updating a progress indicator when you are reading a |
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114 large chunk of data from the decompression stream in a single call.} |
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115 |
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116 TDecompressionStream = class(TCustomZlibStream) |
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117 public |
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118 constructor Create(Source: TStream); |
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119 destructor Destroy; override; |
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120 function Read(var Buffer; Count: Longint): Longint; override; |
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121 function Write(const Buffer; Count: Longint): Longint; override; |
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122 function Seek(Offset: Longint; Origin: Word): Longint; override; |
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123 property OnProgress; |
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124 end; |
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125 |
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126 |
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127 |
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128 { CompressBuf compresses data, buffer to buffer, in one call. |
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129 In: InBuf = ptr to compressed data |
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130 InBytes = number of bytes in InBuf |
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131 Out: OutBuf = ptr to newly allocated buffer containing decompressed data |
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132 OutBytes = number of bytes in OutBuf } |
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133 procedure CompressBuf(const InBuf: Pointer; InBytes: Integer; |
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134 out OutBuf: Pointer; out OutBytes: Integer); |
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135 |
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136 |
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137 { DecompressBuf decompresses data, buffer to buffer, in one call. |
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138 In: InBuf = ptr to compressed data |
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139 InBytes = number of bytes in InBuf |
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140 OutEstimate = zero, or est. size of the decompressed data |
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141 Out: OutBuf = ptr to newly allocated buffer containing decompressed data |
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142 OutBytes = number of bytes in OutBuf } |
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143 procedure DecompressBuf(const InBuf: Pointer; InBytes: Integer; |
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144 OutEstimate: Integer; out OutBuf: Pointer; out OutBytes: Integer); |
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145 |
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146 { DecompressToUserBuf decompresses data, buffer to buffer, in one call. |
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147 In: InBuf = ptr to compressed data |
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148 InBytes = number of bytes in InBuf |
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149 Out: OutBuf = ptr to user-allocated buffer to contain decompressed data |
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150 BufSize = number of bytes in OutBuf } |
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151 procedure DecompressToUserBuf(const InBuf: Pointer; InBytes: Integer; |
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152 const OutBuf: Pointer; BufSize: Integer); |
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153 |
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154 const |
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155 zlib_version = '1.2.3'; |
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156 |
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157 type |
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158 EZlibError = class(Exception); |
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159 ECompressionError = class(EZlibError); |
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160 EDecompressionError = class(EZlibError); |
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161 |
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162 implementation |
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163 |
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164 uses ZLibConst; |
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165 |
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|
166 const |
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167 Z_NO_FLUSH = 0; |
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168 Z_PARTIAL_FLUSH = 1; |
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169 Z_SYNC_FLUSH = 2; |
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170 Z_FULL_FLUSH = 3; |
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171 Z_FINISH = 4; |
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|
172 |
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173 Z_OK = 0; |
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|
174 Z_STREAM_END = 1; |
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175 Z_NEED_DICT = 2; |
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|
176 Z_ERRNO = (-1); |
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|
177 Z_STREAM_ERROR = (-2); |
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|
178 Z_DATA_ERROR = (-3); |
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|
179 Z_MEM_ERROR = (-4); |
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|
180 Z_BUF_ERROR = (-5); |
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|
181 Z_VERSION_ERROR = (-6); |
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|
182 |
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|
183 Z_NO_COMPRESSION = 0; |
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|
184 Z_BEST_SPEED = 1; |
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185 Z_BEST_COMPRESSION = 9; |
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|
186 Z_DEFAULT_COMPRESSION = (-1); |
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187 |
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|
188 Z_FILTERED = 1; |
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|
189 Z_HUFFMAN_ONLY = 2; |
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|
190 Z_RLE = 3; |
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|
191 Z_DEFAULT_STRATEGY = 0; |
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|
192 |
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|
193 Z_BINARY = 0; |
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|
194 Z_ASCII = 1; |
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|
195 Z_UNKNOWN = 2; |
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|
196 |
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|
197 Z_DEFLATED = 8; |
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|
198 |
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|
199 |
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changeset
|
200 {$L adler32.obj} |
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|
201 {$L compress.obj} |
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|
202 {$L crc32.obj} |
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parents:
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changeset
|
203 {$L deflate.obj} |
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parents:
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|
204 {$L infback.obj} |
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parents:
diff
changeset
|
205 {$L inffast.obj} |
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parents:
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changeset
|
206 {$L inflate.obj} |
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parents:
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changeset
|
207 {$L inftrees.obj} |
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parents:
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changeset
|
208 {$L trees.obj} |
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parents:
diff
changeset
|
209 {$L uncompr.obj} |
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parents:
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changeset
|
210 {$L zutil.obj} |
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parents:
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changeset
|
211 |
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parents:
diff
changeset
|
212 procedure adler32; external; |
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parents:
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changeset
|
213 procedure compressBound; external; |
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parents:
diff
changeset
|
214 procedure crc32; external; |
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parents:
diff
changeset
|
215 procedure deflateInit2_; external; |
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216 procedure deflateParams; external; |
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217 |
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218 function _malloc(Size: Integer): Pointer; cdecl; |
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219 begin |
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220 Result := AllocMem(Size); |
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221 end; |
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222 |
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223 procedure _free(Block: Pointer); cdecl; |
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224 begin |
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225 FreeMem(Block); |
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226 end; |
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227 |
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228 procedure _memset(P: Pointer; B: Byte; count: Integer); cdecl; |
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229 begin |
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230 FillChar(P^, count, B); |
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231 end; |
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232 |
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233 procedure _memcpy(dest, source: Pointer; count: Integer); cdecl; |
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234 begin |
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235 Move(source^, dest^, count); |
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236 end; |
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237 |
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238 |
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239 |
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240 // deflate compresses data |
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241 function deflateInit_(var strm: TZStreamRec; level: Integer; version: PChar; |
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242 recsize: Integer): Integer; external; |
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243 function deflate(var strm: TZStreamRec; flush: Integer): Integer; external; |
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244 function deflateEnd(var strm: TZStreamRec): Integer; external; |
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245 |
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246 // inflate decompresses data |
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247 function inflateInit_(var strm: TZStreamRec; version: PChar; |
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248 recsize: Integer): Integer; external; |
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249 function inflate(var strm: TZStreamRec; flush: Integer): Integer; external; |
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250 function inflateEnd(var strm: TZStreamRec): Integer; external; |
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251 function inflateReset(var strm: TZStreamRec): Integer; external; |
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252 |
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253 |
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254 function zlibAllocMem(AppData: Pointer; Items, Size: Integer): Pointer; cdecl; |
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255 begin |
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256 // GetMem(Result, Items*Size); |
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257 Result := AllocMem(Items * Size); |
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258 end; |
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259 |
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260 procedure zlibFreeMem(AppData, Block: Pointer); cdecl; |
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261 begin |
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262 FreeMem(Block); |
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263 end; |
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264 |
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265 {function zlibCheck(code: Integer): Integer; |
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266 begin |
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267 Result := code; |
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268 if code < 0 then |
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269 raise EZlibError.Create('error'); //!! |
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270 end;} |
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271 |
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272 function CCheck(code: Integer): Integer; |
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273 begin |
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274 Result := code; |
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275 if code < 0 then |
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276 raise ECompressionError.Create('error'); //!! |
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277 end; |
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278 |
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279 function DCheck(code: Integer): Integer; |
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280 begin |
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281 Result := code; |
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282 if code < 0 then |
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283 raise EDecompressionError.Create('error'); //!! |
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284 end; |
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285 |
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286 procedure CompressBuf(const InBuf: Pointer; InBytes: Integer; |
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287 out OutBuf: Pointer; out OutBytes: Integer); |
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288 var |
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289 strm: TZStreamRec; |
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290 P: Pointer; |
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291 begin |
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292 FillChar(strm, sizeof(strm), 0); |
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293 strm.zalloc := zlibAllocMem; |
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294 strm.zfree := zlibFreeMem; |
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295 OutBytes := ((InBytes + (InBytes div 10) + 12) + 255) and not 255; |
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296 GetMem(OutBuf, OutBytes); |
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297 try |
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298 strm.next_in := InBuf; |
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299 strm.avail_in := InBytes; |
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300 strm.next_out := OutBuf; |
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301 strm.avail_out := OutBytes; |
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302 CCheck(deflateInit_(strm, Z_BEST_COMPRESSION, zlib_version, sizeof(strm))); |
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303 try |
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304 while CCheck(deflate(strm, Z_FINISH)) <> Z_STREAM_END do |
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305 begin |
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306 P := OutBuf; |
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307 Inc(OutBytes, 256); |
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308 ReallocMem(OutBuf, OutBytes); |
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309 strm.next_out := PChar(Integer(OutBuf) + (Integer(strm.next_out) - Integer(P))); |
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310 strm.avail_out := 256; |
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311 end; |
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312 finally |
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313 CCheck(deflateEnd(strm)); |
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314 end; |
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315 ReallocMem(OutBuf, strm.total_out); |
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316 OutBytes := strm.total_out; |
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317 except |
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318 FreeMem(OutBuf); |
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319 raise |
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|
320 end; |
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321 end; |
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|
322 |
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|
323 |
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324 procedure DecompressBuf(const InBuf: Pointer; InBytes: Integer; |
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325 OutEstimate: Integer; out OutBuf: Pointer; out OutBytes: Integer); |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
326 var |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
327 strm: TZStreamRec; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
328 P: Pointer; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
329 BufInc: Integer; |
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 begin |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
331 FillChar(strm, sizeof(strm), 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
|
332 strm.zalloc := zlibAllocMem; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
333 strm.zfree := zlibFreeMem; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
334 BufInc := (InBytes + 255) and not 255; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
335 if OutEstimate = 0 then |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
336 OutBytes := BufInc |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
337 else |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
338 OutBytes := OutEstimate; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
339 GetMem(OutBuf, OutBytes); |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
340 try |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
341 strm.next_in := InBuf; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
342 strm.avail_in := InBytes; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
343 strm.next_out := OutBuf; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
344 strm.avail_out := OutBytes; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
345 DCheck(inflateInit_(strm, zlib_version, sizeof(strm))); |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
346 try |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
347 while DCheck(inflate(strm, Z_NO_FLUSH)) <> Z_STREAM_END do |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
348 begin |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
349 P := OutBuf; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
350 Inc(OutBytes, BufInc); |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
351 ReallocMem(OutBuf, OutBytes); |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
352 strm.next_out := PChar(Integer(OutBuf) + (Integer(strm.next_out) - Integer(P))); |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
353 strm.avail_out := BufInc; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
354 end; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
355 finally |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
356 DCheck(inflateEnd(strm)); |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
357 end; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
358 ReallocMem(OutBuf, strm.total_out); |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
359 OutBytes := strm.total_out; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
360 except |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
361 FreeMem(OutBuf); |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
362 raise |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
363 end; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
364 end; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
365 |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
366 procedure DecompressToUserBuf(const InBuf: Pointer; InBytes: Integer; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
367 const OutBuf: Pointer; BufSize: Integer); |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
368 var |
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: TZStreamRec; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
370 begin |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
371 FillChar(strm, sizeof(strm), 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
|
372 strm.zalloc := zlibAllocMem; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
373 strm.zfree := zlibFreeMem; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
374 strm.next_in := InBuf; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
375 strm.avail_in := InBytes; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
376 strm.next_out := OutBuf; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
377 strm.avail_out := BufSize; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
378 DCheck(inflateInit_(strm, zlib_version, sizeof(strm))); |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
379 try |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
380 if DCheck(inflate(strm, Z_FINISH)) <> Z_STREAM_END then |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
381 raise EZlibError.CreateRes(@sTargetBufferTooSmall); |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
382 finally |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
383 DCheck(inflateEnd(strm)); |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
384 end; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
385 end; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
386 |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
387 // TCustomZlibStream |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
388 |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
389 constructor TCustomZLibStream.Create(Strm: TStream); |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
390 begin |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
391 inherited Create; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
392 FStrm := Strm; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
393 FStrmPos := Strm.Position; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
394 FZRec.zalloc := zlibAllocMem; |
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 FZRec.zfree := zlibFreeMem; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
396 end; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
397 |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
398 procedure TCustomZLibStream.Progress(Sender: TObject); |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
399 begin |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
400 if Assigned(FOnProgress) then FOnProgress(Sender); |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
401 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
|
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 // TCompressionStream |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
405 |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
406 constructor TCompressionStream.Create(CompressionLevel: TCompressionLevel; |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
407 Dest: TStream); |
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 const |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
409 Levels: array [TCompressionLevel] of ShortInt = |
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 (Z_NO_COMPRESSION, Z_BEST_SPEED, Z_DEFAULT_COMPRESSION, Z_BEST_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
|
411 begin |
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 inherited Create(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
|
413 FZRec.next_out := FBuffer; |
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 FZRec.avail_out := sizeof(FBuffer); |
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 CCheck(deflateInit_(FZRec, Levels[CompressionLevel], zlib_version, sizeof(FZRec))); |
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 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
|
417 |
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 destructor TCompressionStream.Destroy; |
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 begin |
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 FZRec.next_in := 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
|
421 FZRec.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
|
422 try |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
423 if FStrm.Position <> FStrmPos then FStrm.Position := FStrmPos; |
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 while (CCheck(deflate(FZRec, Z_FINISH)) <> 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
|
425 and (FZRec.avail_out = 0) 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
|
426 begin |
ae3a4bfb450b
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
427 FStrm.WriteBuffer(FBuffer, sizeof(FBuffer)); |
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 FZRec.next_out := FBuffer; |
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 FZRec.avail_out := sizeof(FBuffer); |
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 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
|
431 if FZRec.avail_out < sizeof(FBuffer) then |
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 FStrm.WriteBuffer(FBuffer, sizeof(FBuffer) - FZRec.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
|
433 finally |
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 deflateEnd(FZRec); |
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 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
|
436 inherited Destroy; |
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 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
|
438 |
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 function TCompressionStream.Read(var Buffer; Count: Longint): Longint; |
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 begin |
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 raise ECompressionError.CreateRes(@sInvalidStreamOp); |
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 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
|
443 |
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 function TCompressionStream.Write(const Buffer; Count: Longint): Longint; |
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 begin |
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 FZRec.next_in := @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
|
447 FZRec.avail_in := Count; |
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 if FStrm.Position <> FStrmPos then FStrm.Position := FStrmPos; |
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 while (FZRec.avail_in > 0) 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
|
450 begin |
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 CCheck(deflate(FZRec, 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
|
452 if FZRec.avail_out = 0 then |
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 begin |
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 FStrm.WriteBuffer(FBuffer, sizeof(FBuffer)); |
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 FZRec.next_out := FBuffer; |
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 FZRec.avail_out := sizeof(FBuffer); |
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 FStrmPos := FStrm.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
|
458 Progress(Self); |
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 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
|
460 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
|
461 Result := Count; |
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 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
|
463 |
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 function TCompressionStream.Seek(Offset: Longint; Origin: Word): Longint; |
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 begin |
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 if (Offset = 0) and (Origin = soFromCurrent) then |
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 Result := FZRec.total_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
|
468 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
|
469 raise ECompressionError.CreateRes(@sInvalidStreamOp); |
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 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
|
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 function TCompressionStream.GetCompressionRate: Single; |
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 begin |
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 if FZRec.total_in = 0 then |
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 Result := 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
|
476 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
|
477 Result := (1.0 - (FZRec.total_out / FZRec.total_in)) * 100.0; |
ae3a4bfb450b
add some files of version 4.4.3 that have been forgotten.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
478 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
|
479 |
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 |
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 // TDecompressionStream |
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 |
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 constructor TDecompressionStream.Create(Source: TStream); |
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 begin |
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 inherited Create(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
|
486 FZRec.next_in := FBuffer; |
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 FZRec.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
|
488 DCheck(inflateInit_(FZRec, zlib_version, sizeof(FZRec))); |
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 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
|
490 |
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 destructor TDecompressionStream.Destroy; |
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 begin |
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 FStrm.Seek(-FZRec.avail_in, 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
|
494 inflateEnd(FZRec); |
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 inherited Destroy; |
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 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
|
497 |
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 function TDecompressionStream.Read(var Buffer; Count: Longint): Longint; |
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 begin |
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 FZRec.next_out := @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
|
501 FZRec.avail_out := Count; |
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 if FStrm.Position <> FStrmPos then FStrm.Position := FStrmPos; |
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 while (FZRec.avail_out > 0) 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
|
504 begin |
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 if FZRec.avail_in = 0 then |
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 begin |
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 FZRec.avail_in := FStrm.Read(FBuffer, sizeof(FBuffer)); |
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 if FZRec.avail_in = 0 then |
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 begin |
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 Result := Count - FZRec.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
|
511 Exit; |
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 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
|
513 FZRec.next_in := FBuffer; |
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 FStrmPos := FStrm.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
|
515 Progress(Self); |
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 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
|
517 CCheck(inflate(FZRec, 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
|
518 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
|
519 Result := Count; |
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 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
|
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 function TDecompressionStream.Write(const Buffer; Count: Longint): Longint; |
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 begin |
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 raise EDecompressionError.CreateRes(@sInvalidStreamOp); |
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 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
|
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 function TDecompressionStream.Seek(Offset: Longint; Origin: Word): Longint; |
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 var |
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 I: Integer; |
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 Buf: array [0..4095] of Char; |
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 begin |
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 if (Offset = 0) and (Origin = soFromBeginning) then |
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 begin |
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 DCheck(inflateReset(FZRec)); |
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 FZRec.next_in := FBuffer; |
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 FZRec.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
|
537 FStrm.Position := 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
|
538 FStrmPos := 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
|
539 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
|
540 else if ( (Offset >= 0) and (Origin = soFromCurrent)) 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
|
541 ( ((Offset - FZRec.total_out) > 0) and (Origin = soFromBeginning)) then |
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 begin |
ae3a4bfb450b
add some files of version 4.4.3 that have been forgotten.
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543 if Origin = soFromBeginning then Dec(Offset, FZRec.total_out); |
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544 if Offset > 0 then |
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545 begin |
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546 for I := 1 to Offset div sizeof(Buf) do |
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547 ReadBuffer(Buf, sizeof(Buf)); |
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548 ReadBuffer(Buf, Offset mod sizeof(Buf)); |
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549 end; |
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550 end |
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551 else |
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552 raise EDecompressionError.CreateRes(@sInvalidStreamOp); |
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553 Result := FZRec.total_out; |
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554 end; |
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parents:
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555 |
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parents:
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556 |
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parents:
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557 end. |