| 1 | ---------------------------------------------------------------- |
| 2 | -- ZLib for Ada thick binding. -- |
| 3 | -- -- |
| 4 | -- Copyright (C) 2002-2003 Dmitriy Anisimkov -- |
| 5 | -- -- |
| 6 | -- Open source license information is in the zlib.ads file. -- |
| 7 | ---------------------------------------------------------------- |
| 8 | |
| 9 | -- $Id: zlib-thin.ads,v 1.11 2004/07/23 06:33:11 vagul Exp $ |
| 10 | |
| 11 | with Interfaces.C.Strings; |
| 12 | |
| 13 | with System; |
| 14 | |
| 15 | private package ZLib.Thin is |
| 16 | |
| 17 | -- From zconf.h |
| 18 | |
| 19 | MAX_MEM_LEVEL : constant := 9; -- zconf.h:105 |
| 20 | -- zconf.h:105 |
| 21 | MAX_WBITS : constant := 15; -- zconf.h:115 |
| 22 | -- 32K LZ77 window |
| 23 | -- zconf.h:115 |
| 24 | SEEK_SET : constant := 8#0000#; -- zconf.h:244 |
| 25 | -- Seek from beginning of file. |
| 26 | -- zconf.h:244 |
| 27 | SEEK_CUR : constant := 1; -- zconf.h:245 |
| 28 | -- Seek from current position. |
| 29 | -- zconf.h:245 |
| 30 | SEEK_END : constant := 2; -- zconf.h:246 |
| 31 | -- Set file pointer to EOF plus "offset" |
| 32 | -- zconf.h:246 |
| 33 | |
| 34 | type Byte is new Interfaces.C.unsigned_char; -- 8 bits |
| 35 | -- zconf.h:214 |
| 36 | type UInt is new Interfaces.C.unsigned; -- 16 bits or more |
| 37 | -- zconf.h:216 |
| 38 | type Int is new Interfaces.C.int; |
| 39 | |
| 40 | type ULong is new Interfaces.C.unsigned_long; -- 32 bits or more |
| 41 | -- zconf.h:217 |
| 42 | subtype Chars_Ptr is Interfaces.C.Strings.chars_ptr; |
| 43 | |
| 44 | type ULong_Access is access ULong; |
| 45 | type Int_Access is access Int; |
| 46 | |
| 47 | subtype Voidp is System.Address; -- zconf.h:232 |
| 48 | |
| 49 | subtype Byte_Access is Voidp; |
| 50 | |
| 51 | Nul : constant Voidp := System.Null_Address; |
| 52 | -- end from zconf |
| 53 | |
| 54 | Z_NO_FLUSH : constant := 8#0000#; -- zlib.h:125 |
| 55 | -- zlib.h:125 |
| 56 | Z_PARTIAL_FLUSH : constant := 1; -- zlib.h:126 |
| 57 | -- will be removed, use |
| 58 | -- Z_SYNC_FLUSH instead |
| 59 | -- zlib.h:126 |
| 60 | Z_SYNC_FLUSH : constant := 2; -- zlib.h:127 |
| 61 | -- zlib.h:127 |
| 62 | Z_FULL_FLUSH : constant := 3; -- zlib.h:128 |
| 63 | -- zlib.h:128 |
| 64 | Z_FINISH : constant := 4; -- zlib.h:129 |
| 65 | -- zlib.h:129 |
| 66 | Z_OK : constant := 8#0000#; -- zlib.h:132 |
| 67 | -- zlib.h:132 |
| 68 | Z_STREAM_END : constant := 1; -- zlib.h:133 |
| 69 | -- zlib.h:133 |
| 70 | Z_NEED_DICT : constant := 2; -- zlib.h:134 |
| 71 | -- zlib.h:134 |
| 72 | Z_ERRNO : constant := -1; -- zlib.h:135 |
| 73 | -- zlib.h:135 |
| 74 | Z_STREAM_ERROR : constant := -2; -- zlib.h:136 |
| 75 | -- zlib.h:136 |
| 76 | Z_DATA_ERROR : constant := -3; -- zlib.h:137 |
| 77 | -- zlib.h:137 |
| 78 | Z_MEM_ERROR : constant := -4; -- zlib.h:138 |
| 79 | -- zlib.h:138 |
| 80 | Z_BUF_ERROR : constant := -5; -- zlib.h:139 |
| 81 | -- zlib.h:139 |
| 82 | Z_VERSION_ERROR : constant := -6; -- zlib.h:140 |
| 83 | -- zlib.h:140 |
| 84 | Z_NO_COMPRESSION : constant := 8#0000#; -- zlib.h:145 |
| 85 | -- zlib.h:145 |
| 86 | Z_BEST_SPEED : constant := 1; -- zlib.h:146 |
| 87 | -- zlib.h:146 |
| 88 | Z_BEST_COMPRESSION : constant := 9; -- zlib.h:147 |
| 89 | -- zlib.h:147 |
| 90 | Z_DEFAULT_COMPRESSION : constant := -1; -- zlib.h:148 |
| 91 | -- zlib.h:148 |
| 92 | Z_FILTERED : constant := 1; -- zlib.h:151 |
| 93 | -- zlib.h:151 |
| 94 | Z_HUFFMAN_ONLY : constant := 2; -- zlib.h:152 |
| 95 | -- zlib.h:152 |
| 96 | Z_DEFAULT_STRATEGY : constant := 8#0000#; -- zlib.h:153 |
| 97 | -- zlib.h:153 |
| 98 | Z_BINARY : constant := 8#0000#; -- zlib.h:156 |
| 99 | -- zlib.h:156 |
| 100 | Z_ASCII : constant := 1; -- zlib.h:157 |
| 101 | -- zlib.h:157 |
| 102 | Z_UNKNOWN : constant := 2; -- zlib.h:158 |
| 103 | -- zlib.h:158 |
| 104 | Z_DEFLATED : constant := 8; -- zlib.h:161 |
| 105 | -- zlib.h:161 |
| 106 | Z_NULL : constant := 8#0000#; -- zlib.h:164 |
| 107 | -- for initializing zalloc, zfree, opaque |
| 108 | -- zlib.h:164 |
| 109 | type gzFile is new Voidp; -- zlib.h:646 |
| 110 | |
| 111 | type Z_Stream is private; |
| 112 | |
| 113 | type Z_Streamp is access all Z_Stream; -- zlib.h:89 |
| 114 | |
| 115 | type alloc_func is access function |
| 116 | (Opaque : Voidp; |
| 117 | Items : UInt; |
| 118 | Size : UInt) |
| 119 | return Voidp; -- zlib.h:63 |
| 120 | |
| 121 | type free_func is access procedure (opaque : Voidp; address : Voidp); |
| 122 | |
| 123 | function zlibVersion return Chars_Ptr; |
| 124 | |
| 125 | function Deflate (strm : Z_Streamp; flush : Int) return Int; |
| 126 | |
| 127 | function DeflateEnd (strm : Z_Streamp) return Int; |
| 128 | |
| 129 | function Inflate (strm : Z_Streamp; flush : Int) return Int; |
| 130 | |
| 131 | function InflateEnd (strm : Z_Streamp) return Int; |
| 132 | |
| 133 | function deflateSetDictionary |
| 134 | (strm : Z_Streamp; |
| 135 | dictionary : Byte_Access; |
| 136 | dictLength : UInt) |
| 137 | return Int; |
| 138 | |
| 139 | function deflateCopy (dest : Z_Streamp; source : Z_Streamp) return Int; |
| 140 | -- zlib.h:478 |
| 141 | |
| 142 | function deflateReset (strm : Z_Streamp) return Int; -- zlib.h:495 |
| 143 | |
| 144 | function deflateParams |
| 145 | (strm : Z_Streamp; |
| 146 | level : Int; |
| 147 | strategy : Int) |
| 148 | return Int; -- zlib.h:506 |
| 149 | |
| 150 | function inflateSetDictionary |
| 151 | (strm : Z_Streamp; |
| 152 | dictionary : Byte_Access; |
| 153 | dictLength : UInt) |
| 154 | return Int; -- zlib.h:548 |
| 155 | |
| 156 | function inflateSync (strm : Z_Streamp) return Int; -- zlib.h:565 |
| 157 | |
| 158 | function inflateReset (strm : Z_Streamp) return Int; -- zlib.h:580 |
| 159 | |
| 160 | function compress |
| 161 | (dest : Byte_Access; |
| 162 | destLen : ULong_Access; |
| 163 | source : Byte_Access; |
| 164 | sourceLen : ULong) |
| 165 | return Int; -- zlib.h:601 |
| 166 | |
| 167 | function compress2 |
| 168 | (dest : Byte_Access; |
| 169 | destLen : ULong_Access; |
| 170 | source : Byte_Access; |
| 171 | sourceLen : ULong; |
| 172 | level : Int) |
| 173 | return Int; -- zlib.h:615 |
| 174 | |
| 175 | function uncompress |
| 176 | (dest : Byte_Access; |
| 177 | destLen : ULong_Access; |
| 178 | source : Byte_Access; |
| 179 | sourceLen : ULong) |
| 180 | return Int; |
| 181 | |
| 182 | function gzopen (path : Chars_Ptr; mode : Chars_Ptr) return gzFile; |
| 183 | |
| 184 | function gzdopen (fd : Int; mode : Chars_Ptr) return gzFile; |
| 185 | |
| 186 | function gzsetparams |
| 187 | (file : gzFile; |
| 188 | level : Int; |
| 189 | strategy : Int) |
| 190 | return Int; |
| 191 | |
| 192 | function gzread |
| 193 | (file : gzFile; |
| 194 | buf : Voidp; |
| 195 | len : UInt) |
| 196 | return Int; |
| 197 | |
| 198 | function gzwrite |
| 199 | (file : in gzFile; |
| 200 | buf : in Voidp; |
| 201 | len : in UInt) |
| 202 | return Int; |
| 203 | |
| 204 | function gzprintf (file : in gzFile; format : in Chars_Ptr) return Int; |
| 205 | |
| 206 | function gzputs (file : in gzFile; s : in Chars_Ptr) return Int; |
| 207 | |
| 208 | function gzgets |
| 209 | (file : gzFile; |
| 210 | buf : Chars_Ptr; |
| 211 | len : Int) |
| 212 | return Chars_Ptr; |
| 213 | |
| 214 | function gzputc (file : gzFile; char : Int) return Int; |
| 215 | |
| 216 | function gzgetc (file : gzFile) return Int; |
| 217 | |
| 218 | function gzflush (file : gzFile; flush : Int) return Int; |
| 219 | |
| 220 | function gzseek |
| 221 | (file : gzFile; |
| 222 | offset : Int; |
| 223 | whence : Int) |
| 224 | return Int; |
| 225 | |
| 226 | function gzrewind (file : gzFile) return Int; |
| 227 | |
| 228 | function gztell (file : gzFile) return Int; |
| 229 | |
| 230 | function gzeof (file : gzFile) return Int; |
| 231 | |
| 232 | function gzclose (file : gzFile) return Int; |
| 233 | |
| 234 | function gzerror (file : gzFile; errnum : Int_Access) return Chars_Ptr; |
| 235 | |
| 236 | function adler32 |
| 237 | (adler : ULong; |
| 238 | buf : Byte_Access; |
| 239 | len : UInt) |
| 240 | return ULong; |
| 241 | |
| 242 | function crc32 |
| 243 | (crc : ULong; |
| 244 | buf : Byte_Access; |
| 245 | len : UInt) |
| 246 | return ULong; |
| 247 | |
| 248 | function deflateInit |
| 249 | (strm : Z_Streamp; |
| 250 | level : Int; |
| 251 | version : Chars_Ptr; |
| 252 | stream_size : Int) |
| 253 | return Int; |
| 254 | |
| 255 | function deflateInit2 |
| 256 | (strm : Z_Streamp; |
| 257 | level : Int; |
| 258 | method : Int; |
| 259 | windowBits : Int; |
| 260 | memLevel : Int; |
| 261 | strategy : Int; |
| 262 | version : Chars_Ptr; |
| 263 | stream_size : Int) |
| 264 | return Int; |
| 265 | |
| 266 | function Deflate_Init |
| 267 | (strm : Z_Streamp; |
| 268 | level : Int; |
| 269 | method : Int; |
| 270 | windowBits : Int; |
| 271 | memLevel : Int; |
| 272 | strategy : Int) |
| 273 | return Int; |
| 274 | pragma Inline (Deflate_Init); |
| 275 | |
| 276 | function inflateInit |
| 277 | (strm : Z_Streamp; |
| 278 | version : Chars_Ptr; |
| 279 | stream_size : Int) |
| 280 | return Int; |
| 281 | |
| 282 | function inflateInit2 |
| 283 | (strm : in Z_Streamp; |
| 284 | windowBits : in Int; |
| 285 | version : in Chars_Ptr; |
| 286 | stream_size : in Int) |
| 287 | return Int; |
| 288 | |
| 289 | function inflateBackInit |
| 290 | (strm : in Z_Streamp; |
| 291 | windowBits : in Int; |
| 292 | window : in Byte_Access; |
| 293 | version : in Chars_Ptr; |
| 294 | stream_size : in Int) |
| 295 | return Int; |
| 296 | -- Size of window have to be 2**windowBits. |
| 297 | |
| 298 | function Inflate_Init (strm : Z_Streamp; windowBits : Int) return Int; |
| 299 | pragma Inline (Inflate_Init); |
| 300 | |
| 301 | function zError (err : Int) return Chars_Ptr; |
| 302 | |
| 303 | function inflateSyncPoint (z : Z_Streamp) return Int; |
| 304 | |
| 305 | function get_crc_table return ULong_Access; |
| 306 | |
| 307 | -- Interface to the available fields of the z_stream structure. |
| 308 | -- The application must update next_in and avail_in when avail_in has |
| 309 | -- dropped to zero. It must update next_out and avail_out when avail_out |
| 310 | -- has dropped to zero. The application must initialize zalloc, zfree and |
| 311 | -- opaque before calling the init function. |
| 312 | |
| 313 | procedure Set_In |
| 314 | (Strm : in out Z_Stream; |
| 315 | Buffer : in Voidp; |
| 316 | Size : in UInt); |
| 317 | pragma Inline (Set_In); |
| 318 | |
| 319 | procedure Set_Out |
| 320 | (Strm : in out Z_Stream; |
| 321 | Buffer : in Voidp; |
| 322 | Size : in UInt); |
| 323 | pragma Inline (Set_Out); |
| 324 | |
| 325 | procedure Set_Mem_Func |
| 326 | (Strm : in out Z_Stream; |
| 327 | Opaque : in Voidp; |
| 328 | Alloc : in alloc_func; |
| 329 | Free : in free_func); |
| 330 | pragma Inline (Set_Mem_Func); |
| 331 | |
| 332 | function Last_Error_Message (Strm : in Z_Stream) return String; |
| 333 | pragma Inline (Last_Error_Message); |
| 334 | |
| 335 | function Avail_Out (Strm : in Z_Stream) return UInt; |
| 336 | pragma Inline (Avail_Out); |
| 337 | |
| 338 | function Avail_In (Strm : in Z_Stream) return UInt; |
| 339 | pragma Inline (Avail_In); |
| 340 | |
| 341 | function Total_In (Strm : in Z_Stream) return ULong; |
| 342 | pragma Inline (Total_In); |
| 343 | |
| 344 | function Total_Out (Strm : in Z_Stream) return ULong; |
| 345 | pragma Inline (Total_Out); |
| 346 | |
| 347 | function inflateCopy |
| 348 | (dest : in Z_Streamp; |
| 349 | Source : in Z_Streamp) |
| 350 | return Int; |
| 351 | |
| 352 | function compressBound (Source_Len : in ULong) return ULong; |
| 353 | |
| 354 | function deflateBound |
| 355 | (Strm : in Z_Streamp; |
| 356 | Source_Len : in ULong) |
| 357 | return ULong; |
| 358 | |
| 359 | function gzungetc (C : in Int; File : in gzFile) return Int; |
| 360 | |
| 361 | function zlibCompileFlags return ULong; |
| 362 | |
| 363 | private |
| 364 | |
| 365 | type Z_Stream is record -- zlib.h:68 |
| 366 | Next_In : Voidp := Nul; -- next input byte |
| 367 | Avail_In : UInt := 0; -- number of bytes available at next_in |
| 368 | Total_In : ULong := 0; -- total nb of input bytes read so far |
| 369 | Next_Out : Voidp := Nul; -- next output byte should be put there |
| 370 | Avail_Out : UInt := 0; -- remaining free space at next_out |
| 371 | Total_Out : ULong := 0; -- total nb of bytes output so far |
| 372 | msg : Chars_Ptr; -- last error message, NULL if no error |
| 373 | state : Voidp; -- not visible by applications |
| 374 | zalloc : alloc_func := null; -- used to allocate the internal state |
| 375 | zfree : free_func := null; -- used to free the internal state |
| 376 | opaque : Voidp; -- private data object passed to |
| 377 | -- zalloc and zfree |
| 378 | data_type : Int; -- best guess about the data type: |
| 379 | -- ascii or binary |
| 380 | adler : ULong; -- adler32 value of the uncompressed |
| 381 | -- data |
| 382 | reserved : ULong; -- reserved for future use |
| 383 | end record; |
| 384 | |
| 385 | pragma Convention (C, Z_Stream); |
| 386 | |
| 387 | pragma Import (C, zlibVersion, "zlibVersion"); |
| 388 | pragma Import (C, Deflate, "deflate"); |
| 389 | pragma Import (C, DeflateEnd, "deflateEnd"); |
| 390 | pragma Import (C, Inflate, "inflate"); |
| 391 | pragma Import (C, InflateEnd, "inflateEnd"); |
| 392 | pragma Import (C, deflateSetDictionary, "deflateSetDictionary"); |
| 393 | pragma Import (C, deflateCopy, "deflateCopy"); |
| 394 | pragma Import (C, deflateReset, "deflateReset"); |
| 395 | pragma Import (C, deflateParams, "deflateParams"); |
| 396 | pragma Import (C, inflateSetDictionary, "inflateSetDictionary"); |
| 397 | pragma Import (C, inflateSync, "inflateSync"); |
| 398 | pragma Import (C, inflateReset, "inflateReset"); |
| 399 | pragma Import (C, compress, "compress"); |
| 400 | pragma Import (C, compress2, "compress2"); |
| 401 | pragma Import (C, uncompress, "uncompress"); |
| 402 | pragma Import (C, gzopen, "gzopen"); |
| 403 | pragma Import (C, gzdopen, "gzdopen"); |
| 404 | pragma Import (C, gzsetparams, "gzsetparams"); |
| 405 | pragma Import (C, gzread, "gzread"); |
| 406 | pragma Import (C, gzwrite, "gzwrite"); |
| 407 | pragma Import (C, gzprintf, "gzprintf"); |
| 408 | pragma Import (C, gzputs, "gzputs"); |
| 409 | pragma Import (C, gzgets, "gzgets"); |
| 410 | pragma Import (C, gzputc, "gzputc"); |
| 411 | pragma Import (C, gzgetc, "gzgetc"); |
| 412 | pragma Import (C, gzflush, "gzflush"); |
| 413 | pragma Import (C, gzseek, "gzseek"); |
| 414 | pragma Import (C, gzrewind, "gzrewind"); |
| 415 | pragma Import (C, gztell, "gztell"); |
| 416 | pragma Import (C, gzeof, "gzeof"); |
| 417 | pragma Import (C, gzclose, "gzclose"); |
| 418 | pragma Import (C, gzerror, "gzerror"); |
| 419 | pragma Import (C, adler32, "adler32"); |
| 420 | pragma Import (C, crc32, "crc32"); |
| 421 | pragma Import (C, deflateInit, "deflateInit_"); |
| 422 | pragma Import (C, inflateInit, "inflateInit_"); |
| 423 | pragma Import (C, deflateInit2, "deflateInit2_"); |
| 424 | pragma Import (C, inflateInit2, "inflateInit2_"); |
| 425 | pragma Import (C, zError, "zError"); |
| 426 | pragma Import (C, inflateSyncPoint, "inflateSyncPoint"); |
| 427 | pragma Import (C, get_crc_table, "get_crc_table"); |
| 428 | |
| 429 | -- since zlib 1.2.0: |
| 430 | |
| 431 | pragma Import (C, inflateCopy, "inflateCopy"); |
| 432 | pragma Import (C, compressBound, "compressBound"); |
| 433 | pragma Import (C, deflateBound, "deflateBound"); |
| 434 | pragma Import (C, gzungetc, "gzungetc"); |
| 435 | pragma Import (C, zlibCompileFlags, "zlibCompileFlags"); |
| 436 | |
| 437 | pragma Import (C, inflateBackInit, "inflateBackInit_"); |
| 438 | |
| 439 | -- I stopped binding the inflateBack routines, because realize that |
| 440 | -- it does not support zlib and gzip headers for now, and have no |
| 441 | -- symmetric deflateBack routines. |
| 442 | -- ZLib-Ada is symmetric regarding deflate/inflate data transformation |
| 443 | -- and has a similar generic callback interface for the |
| 444 | -- deflate/inflate transformation based on the regular Deflate/Inflate |
| 445 | -- routines. |
| 446 | |
| 447 | -- pragma Import (C, inflateBack, "inflateBack"); |
| 448 | -- pragma Import (C, inflateBackEnd, "inflateBackEnd"); |
| 449 | |
| 450 | end ZLib.Thin; |