9e052883 |
1 | (* zlibpas -- Pascal interface to the zlib data compression library |
2 | * |
3 | * Copyright (C) 2003 Cosmin Truta. |
4 | * Derived from original sources by Bob Dellaca. |
5 | * For conditions of distribution and use, see copyright notice in readme.txt |
6 | *) |
7 | |
8 | unit zlibpas; |
9 | |
10 | interface |
11 | |
12 | const |
13 | ZLIB_VERSION = '1.2.13'; |
14 | ZLIB_VERNUM = $12a0; |
15 | |
16 | type |
17 | alloc_func = function(opaque: Pointer; items, size: Integer): Pointer; |
18 | cdecl; |
19 | free_func = procedure(opaque, address: Pointer); |
20 | cdecl; |
21 | |
22 | in_func = function(opaque: Pointer; var buf: PByte): Integer; |
23 | cdecl; |
24 | out_func = function(opaque: Pointer; buf: PByte; size: Integer): Integer; |
25 | cdecl; |
26 | |
27 | z_streamp = ^z_stream; |
28 | z_stream = packed record |
29 | next_in: PChar; (* next input byte *) |
30 | avail_in: Integer; (* number of bytes available at next_in *) |
31 | total_in: LongInt; (* total nb of input bytes read so far *) |
32 | |
33 | next_out: PChar; (* next output byte should be put there *) |
34 | avail_out: Integer; (* remaining free space at next_out *) |
35 | total_out: LongInt; (* total nb of bytes output so far *) |
36 | |
37 | msg: PChar; (* last error message, NULL if no error *) |
38 | state: Pointer; (* not visible by applications *) |
39 | |
40 | zalloc: alloc_func; (* used to allocate the internal state *) |
41 | zfree: free_func; (* used to free the internal state *) |
42 | opaque: Pointer; (* private data object passed to zalloc and zfree *) |
43 | |
44 | data_type: Integer; (* best guess about the data type: ascii or binary *) |
45 | adler: LongInt; (* adler32 value of the uncompressed data *) |
46 | reserved: LongInt; (* reserved for future use *) |
47 | end; |
48 | |
49 | gz_headerp = ^gz_header; |
50 | gz_header = packed record |
51 | text: Integer; (* true if compressed data believed to be text *) |
52 | time: LongInt; (* modification time *) |
53 | xflags: Integer; (* extra flags (not used when writing a gzip file) *) |
54 | os: Integer; (* operating system *) |
55 | extra: PChar; (* pointer to extra field or Z_NULL if none *) |
56 | extra_len: Integer; (* extra field length (valid if extra != Z_NULL) *) |
57 | extra_max: Integer; (* space at extra (only when reading header) *) |
58 | name: PChar; (* pointer to zero-terminated file name or Z_NULL *) |
59 | name_max: Integer; (* space at name (only when reading header) *) |
60 | comment: PChar; (* pointer to zero-terminated comment or Z_NULL *) |
61 | comm_max: Integer; (* space at comment (only when reading header) *) |
62 | hcrc: Integer; (* true if there was or will be a header crc *) |
63 | done: Integer; (* true when done reading gzip header *) |
64 | end; |
65 | |
66 | (* constants *) |
67 | const |
68 | Z_NO_FLUSH = 0; |
69 | Z_PARTIAL_FLUSH = 1; |
70 | Z_SYNC_FLUSH = 2; |
71 | Z_FULL_FLUSH = 3; |
72 | Z_FINISH = 4; |
73 | Z_BLOCK = 5; |
74 | Z_TREES = 6; |
75 | |
76 | Z_OK = 0; |
77 | Z_STREAM_END = 1; |
78 | Z_NEED_DICT = 2; |
79 | Z_ERRNO = -1; |
80 | Z_STREAM_ERROR = -2; |
81 | Z_DATA_ERROR = -3; |
82 | Z_MEM_ERROR = -4; |
83 | Z_BUF_ERROR = -5; |
84 | Z_VERSION_ERROR = -6; |
85 | |
86 | Z_NO_COMPRESSION = 0; |
87 | Z_BEST_SPEED = 1; |
88 | Z_BEST_COMPRESSION = 9; |
89 | Z_DEFAULT_COMPRESSION = -1; |
90 | |
91 | Z_FILTERED = 1; |
92 | Z_HUFFMAN_ONLY = 2; |
93 | Z_RLE = 3; |
94 | Z_FIXED = 4; |
95 | Z_DEFAULT_STRATEGY = 0; |
96 | |
97 | Z_BINARY = 0; |
98 | Z_TEXT = 1; |
99 | Z_ASCII = 1; |
100 | Z_UNKNOWN = 2; |
101 | |
102 | Z_DEFLATED = 8; |
103 | |
104 | (* basic functions *) |
105 | function zlibVersion: PChar; |
106 | function deflateInit(var strm: z_stream; level: Integer): Integer; |
107 | function deflate(var strm: z_stream; flush: Integer): Integer; |
108 | function deflateEnd(var strm: z_stream): Integer; |
109 | function inflateInit(var strm: z_stream): Integer; |
110 | function inflate(var strm: z_stream; flush: Integer): Integer; |
111 | function inflateEnd(var strm: z_stream): Integer; |
112 | |
113 | (* advanced functions *) |
114 | function deflateInit2(var strm: z_stream; level, method, windowBits, |
115 | memLevel, strategy: Integer): Integer; |
116 | function deflateSetDictionary(var strm: z_stream; const dictionary: PChar; |
117 | dictLength: Integer): Integer; |
118 | function deflateCopy(var dest, source: z_stream): Integer; |
119 | function deflateReset(var strm: z_stream): Integer; |
120 | function deflateParams(var strm: z_stream; level, strategy: Integer): Integer; |
121 | function deflateTune(var strm: z_stream; good_length, max_lazy, nice_length, max_chain: Integer): Integer; |
122 | function deflateBound(var strm: z_stream; sourceLen: LongInt): LongInt; |
123 | function deflatePending(var strm: z_stream; var pending: Integer; var bits: Integer): Integer; |
124 | function deflatePrime(var strm: z_stream; bits, value: Integer): Integer; |
125 | function deflateSetHeader(var strm: z_stream; head: gz_header): Integer; |
126 | function inflateInit2(var strm: z_stream; windowBits: Integer): Integer; |
127 | function inflateSetDictionary(var strm: z_stream; const dictionary: PChar; |
128 | dictLength: Integer): Integer; |
129 | function inflateSync(var strm: z_stream): Integer; |
130 | function inflateCopy(var dest, source: z_stream): Integer; |
131 | function inflateReset(var strm: z_stream): Integer; |
132 | function inflateReset2(var strm: z_stream; windowBits: Integer): Integer; |
133 | function inflatePrime(var strm: z_stream; bits, value: Integer): Integer; |
134 | function inflateMark(var strm: z_stream): LongInt; |
135 | function inflateGetHeader(var strm: z_stream; var head: gz_header): Integer; |
136 | function inflateBackInit(var strm: z_stream; |
137 | windowBits: Integer; window: PChar): Integer; |
138 | function inflateBack(var strm: z_stream; in_fn: in_func; in_desc: Pointer; |
139 | out_fn: out_func; out_desc: Pointer): Integer; |
140 | function inflateBackEnd(var strm: z_stream): Integer; |
141 | function zlibCompileFlags: LongInt; |
142 | |
143 | (* utility functions *) |
144 | function compress(dest: PChar; var destLen: LongInt; |
145 | const source: PChar; sourceLen: LongInt): Integer; |
146 | function compress2(dest: PChar; var destLen: LongInt; |
147 | const source: PChar; sourceLen: LongInt; |
148 | level: Integer): Integer; |
149 | function compressBound(sourceLen: LongInt): LongInt; |
150 | function uncompress(dest: PChar; var destLen: LongInt; |
151 | const source: PChar; sourceLen: LongInt): Integer; |
152 | |
153 | (* checksum functions *) |
154 | function adler32(adler: LongInt; const buf: PChar; len: Integer): LongInt; |
155 | function adler32_combine(adler1, adler2, len2: LongInt): LongInt; |
156 | function crc32(crc: LongInt; const buf: PChar; len: Integer): LongInt; |
157 | function crc32_combine(crc1, crc2, len2: LongInt): LongInt; |
158 | |
159 | (* various hacks, don't look :) *) |
160 | function deflateInit_(var strm: z_stream; level: Integer; |
161 | const version: PChar; stream_size: Integer): Integer; |
162 | function inflateInit_(var strm: z_stream; const version: PChar; |
163 | stream_size: Integer): Integer; |
164 | function deflateInit2_(var strm: z_stream; |
165 | level, method, windowBits, memLevel, strategy: Integer; |
166 | const version: PChar; stream_size: Integer): Integer; |
167 | function inflateInit2_(var strm: z_stream; windowBits: Integer; |
168 | const version: PChar; stream_size: Integer): Integer; |
169 | function inflateBackInit_(var strm: z_stream; |
170 | windowBits: Integer; window: PChar; |
171 | const version: PChar; stream_size: Integer): Integer; |
172 | |
173 | |
174 | implementation |
175 | |
176 | {$L adler32.obj} |
177 | {$L compress.obj} |
178 | {$L crc32.obj} |
179 | {$L deflate.obj} |
180 | {$L infback.obj} |
181 | {$L inffast.obj} |
182 | {$L inflate.obj} |
183 | {$L inftrees.obj} |
184 | {$L trees.obj} |
185 | {$L uncompr.obj} |
186 | {$L zutil.obj} |
187 | |
188 | function adler32; external; |
189 | function adler32_combine; external; |
190 | function compress; external; |
191 | function compress2; external; |
192 | function compressBound; external; |
193 | function crc32; external; |
194 | function crc32_combine; external; |
195 | function deflate; external; |
196 | function deflateBound; external; |
197 | function deflateCopy; external; |
198 | function deflateEnd; external; |
199 | function deflateInit_; external; |
200 | function deflateInit2_; external; |
201 | function deflateParams; external; |
202 | function deflatePending; external; |
203 | function deflatePrime; external; |
204 | function deflateReset; external; |
205 | function deflateSetDictionary; external; |
206 | function deflateSetHeader; external; |
207 | function deflateTune; external; |
208 | function inflate; external; |
209 | function inflateBack; external; |
210 | function inflateBackEnd; external; |
211 | function inflateBackInit_; external; |
212 | function inflateCopy; external; |
213 | function inflateEnd; external; |
214 | function inflateGetHeader; external; |
215 | function inflateInit_; external; |
216 | function inflateInit2_; external; |
217 | function inflateMark; external; |
218 | function inflatePrime; external; |
219 | function inflateReset; external; |
220 | function inflateReset2; external; |
221 | function inflateSetDictionary; external; |
222 | function inflateSync; external; |
223 | function uncompress; external; |
224 | function zlibCompileFlags; external; |
225 | function zlibVersion; external; |
226 | |
227 | function deflateInit(var strm: z_stream; level: Integer): Integer; |
228 | begin |
229 | Result := deflateInit_(strm, level, ZLIB_VERSION, sizeof(z_stream)); |
230 | end; |
231 | |
232 | function deflateInit2(var strm: z_stream; level, method, windowBits, memLevel, |
233 | strategy: Integer): Integer; |
234 | begin |
235 | Result := deflateInit2_(strm, level, method, windowBits, memLevel, strategy, |
236 | ZLIB_VERSION, sizeof(z_stream)); |
237 | end; |
238 | |
239 | function inflateInit(var strm: z_stream): Integer; |
240 | begin |
241 | Result := inflateInit_(strm, ZLIB_VERSION, sizeof(z_stream)); |
242 | end; |
243 | |
244 | function inflateInit2(var strm: z_stream; windowBits: Integer): Integer; |
245 | begin |
246 | Result := inflateInit2_(strm, windowBits, ZLIB_VERSION, sizeof(z_stream)); |
247 | end; |
248 | |
249 | function inflateBackInit(var strm: z_stream; |
250 | windowBits: Integer; window: PChar): Integer; |
251 | begin |
252 | Result := inflateBackInit_(strm, windowBits, window, |
253 | ZLIB_VERSION, sizeof(z_stream)); |
254 | end; |
255 | |
256 | function _malloc(Size: Integer): Pointer; cdecl; |
257 | begin |
258 | GetMem(Result, Size); |
259 | end; |
260 | |
261 | procedure _free(Block: Pointer); cdecl; |
262 | begin |
263 | FreeMem(Block); |
264 | end; |
265 | |
266 | procedure _memset(P: Pointer; B: Byte; count: Integer); cdecl; |
267 | begin |
268 | FillChar(P^, count, B); |
269 | end; |
270 | |
271 | procedure _memcpy(dest, source: Pointer; count: Integer); cdecl; |
272 | begin |
273 | Move(source^, dest^, count); |
274 | end; |
275 | |
276 | end. |