| 1 | /* example.c -- usage example of the zlib compression library |
| 2 | */ |
| 3 | /* |
| 4 | Copyright (c) 1995-2006, 2011 Jean-loup Gailly |
| 5 | |
| 6 | This software is provided 'as-is', without any express or implied |
| 7 | warranty. In no event will the authors be held liable for any damages |
| 8 | arising from the use of this software. |
| 9 | |
| 10 | Permission is granted to anyone to use this software for any purpose, |
| 11 | including commercial applications, and to alter it and redistribute it |
| 12 | freely, subject to the following restrictions: |
| 13 | |
| 14 | 1. The origin of this software must not be misrepresented; you must not |
| 15 | claim that you wrote the original software. If you use this software |
| 16 | in a product, an acknowledgement in the product documentation would be |
| 17 | appreciated but is not required. |
| 18 | 2. Altered source versions must be plainly marked as such, and must not be |
| 19 | misrepresented as being the original software. |
| 20 | 3. This notice may not be removed or altered from any source distribution. |
| 21 | */ |
| 22 | |
| 23 | /* @(#) $Id$ */ |
| 24 | |
| 25 | #include "zlib.h" |
| 26 | #include <stdio.h> |
| 27 | |
| 28 | #ifdef STDC |
| 29 | # include <string.h> |
| 30 | # include <stdlib.h> |
| 31 | #endif |
| 32 | |
| 33 | #if defined(VMS) || defined(RISCOS) |
| 34 | # define TESTFILE "foo-gz" |
| 35 | #else |
| 36 | # define TESTFILE "foo.gz" |
| 37 | #endif |
| 38 | |
| 39 | #define CHECK_ERR(err, msg) { \ |
| 40 | if (err != Z_OK) { \ |
| 41 | fprintf(stderr, "%s error: %d\n", msg, err); \ |
| 42 | exit(1); \ |
| 43 | } \ |
| 44 | } |
| 45 | |
| 46 | z_const char hello[] = "hello, hello!"; |
| 47 | /* "hello world" would be more standard, but the repeated "hello" |
| 48 | * stresses the compression code better, sorry... |
| 49 | */ |
| 50 | |
| 51 | const char dictionary[] = "hello"; |
| 52 | uLong dictId; /* Adler32 value of the dictionary */ |
| 53 | |
| 54 | void test_deflate _Z_OF((Byte *compr, uLong comprLen)); |
| 55 | void test_inflate _Z_OF((Byte *compr, uLong comprLen, |
| 56 | Byte *uncompr, uLong uncomprLen)); |
| 57 | void test_large_deflate _Z_OF((Byte *compr, uLong comprLen, |
| 58 | Byte *uncompr, uLong uncomprLen)); |
| 59 | void test_large_inflate _Z_OF((Byte *compr, uLong comprLen, |
| 60 | Byte *uncompr, uLong uncomprLen)); |
| 61 | void test_flush _Z_OF((Byte *compr, uLong *comprLen)); |
| 62 | void test_sync _Z_OF((Byte *compr, uLong comprLen, |
| 63 | Byte *uncompr, uLong uncomprLen)); |
| 64 | void test_dict_deflate _Z_OF((Byte *compr, uLong comprLen)); |
| 65 | void test_dict_inflate _Z_OF((Byte *compr, uLong comprLen, |
| 66 | Byte *uncompr, uLong uncomprLen)); |
| 67 | int main _Z_OF((int argc, char *argv[])); |
| 68 | |
| 69 | |
| 70 | #ifdef Z_SOLO |
| 71 | |
| 72 | void *myalloc _Z_OF((void *, unsigned, unsigned)); |
| 73 | void myfree _Z_OF((void *, void *)); |
| 74 | |
| 75 | void *myalloc(q, n, m) |
| 76 | void *q; |
| 77 | unsigned n, m; |
| 78 | { |
| 79 | q = Z_NULL; |
| 80 | return calloc(n, m); |
| 81 | } |
| 82 | |
| 83 | void myfree(void *q, void *p) |
| 84 | { |
| 85 | q = Z_NULL; |
| 86 | free(p); |
| 87 | } |
| 88 | |
| 89 | static alloc_func zalloc = myalloc; |
| 90 | static free_func zfree = myfree; |
| 91 | |
| 92 | #else /* !Z_SOLO */ |
| 93 | |
| 94 | static alloc_func zalloc = (alloc_func)0; |
| 95 | static free_func zfree = (free_func)0; |
| 96 | |
| 97 | void test_compress _Z_OF((Byte *compr, uLong comprLen, |
| 98 | Byte *uncompr, uLong uncomprLen)); |
| 99 | void test_gzio _Z_OF((const char *fname, |
| 100 | Byte *uncompr, uLong uncomprLen)); |
| 101 | |
| 102 | /* =========================================================================== |
| 103 | * Test compress() and uncompress() |
| 104 | */ |
| 105 | void test_compress(compr, comprLen, uncompr, uncomprLen) |
| 106 | Byte *compr, *uncompr; |
| 107 | uLong comprLen, uncomprLen; |
| 108 | { |
| 109 | int err; |
| 110 | uLong len = (uLong)strlen(hello)+1; |
| 111 | |
| 112 | err = compress(compr, &comprLen, (const Bytef*)hello, len); |
| 113 | CHECK_ERR(err, "compress"); |
| 114 | |
| 115 | strcpy((char*)uncompr, "garbage"); |
| 116 | |
| 117 | err = uncompress(uncompr, &uncomprLen, compr, comprLen); |
| 118 | CHECK_ERR(err, "uncompress"); |
| 119 | |
| 120 | if (strcmp((char*)uncompr, hello)) { |
| 121 | fprintf(stderr, "bad uncompress\n"); |
| 122 | exit(1); |
| 123 | } else { |
| 124 | printf("uncompress(): %s\n", (char *)uncompr); |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | /* =========================================================================== |
| 129 | * Test read/write of .gz files |
| 130 | */ |
| 131 | void test_gzio(fname, uncompr, uncomprLen) |
| 132 | const char *fname; /* compressed file name */ |
| 133 | Byte *uncompr; |
| 134 | uLong uncomprLen; |
| 135 | { |
| 136 | #ifdef NO_GZCOMPRESS |
| 137 | fprintf(stderr, "NO_GZCOMPRESS -- gz* functions cannot compress\n"); |
| 138 | #else |
| 139 | int err; |
| 140 | int len = (int)strlen(hello)+1; |
| 141 | gzFile file; |
| 142 | z_off_t pos; |
| 143 | |
| 144 | file = gzopen(fname, "wb"); |
| 145 | if (file == NULL) { |
| 146 | fprintf(stderr, "gzopen error\n"); |
| 147 | exit(1); |
| 148 | } |
| 149 | gzputc(file, 'h'); |
| 150 | if (gzputs(file, "ello") != 4) { |
| 151 | fprintf(stderr, "gzputs err: %s\n", gzerror(file, &err)); |
| 152 | exit(1); |
| 153 | } |
| 154 | if (gzprintf(file, ", %s!", "hello") != 8) { |
| 155 | fprintf(stderr, "gzprintf err: %s\n", gzerror(file, &err)); |
| 156 | exit(1); |
| 157 | } |
| 158 | gzseek(file, 1L, SEEK_CUR); /* add one zero byte */ |
| 159 | gzclose(file); |
| 160 | |
| 161 | file = gzopen(fname, "rb"); |
| 162 | if (file == NULL) { |
| 163 | fprintf(stderr, "gzopen error\n"); |
| 164 | exit(1); |
| 165 | } |
| 166 | strcpy((char*)uncompr, "garbage"); |
| 167 | |
| 168 | if (gzread(file, uncompr, (unsigned)uncomprLen) != len) { |
| 169 | fprintf(stderr, "gzread err: %s\n", gzerror(file, &err)); |
| 170 | exit(1); |
| 171 | } |
| 172 | if (strcmp((char*)uncompr, hello)) { |
| 173 | fprintf(stderr, "bad gzread: %s\n", (char*)uncompr); |
| 174 | exit(1); |
| 175 | } else { |
| 176 | printf("gzread(): %s\n", (char*)uncompr); |
| 177 | } |
| 178 | |
| 179 | pos = gzseek(file, -8L, SEEK_CUR); |
| 180 | if (pos != 6 || gztell(file) != pos) { |
| 181 | fprintf(stderr, "gzseek error, pos=%ld, gztell=%ld\n", |
| 182 | (long)pos, (long)gztell(file)); |
| 183 | exit(1); |
| 184 | } |
| 185 | |
| 186 | if (gzgetc(file) != ' ') { |
| 187 | fprintf(stderr, "gzgetc error\n"); |
| 188 | exit(1); |
| 189 | } |
| 190 | |
| 191 | if (gzungetc(' ', file) != ' ') { |
| 192 | fprintf(stderr, "gzungetc error\n"); |
| 193 | exit(1); |
| 194 | } |
| 195 | |
| 196 | gzgets(file, (char*)uncompr, (int)uncomprLen); |
| 197 | if (strlen((char*)uncompr) != 7) { /* " hello!" */ |
| 198 | fprintf(stderr, "gzgets err after gzseek: %s\n", gzerror(file, &err)); |
| 199 | exit(1); |
| 200 | } |
| 201 | if (strcmp((char*)uncompr, hello + 6)) { |
| 202 | fprintf(stderr, "bad gzgets after gzseek\n"); |
| 203 | exit(1); |
| 204 | } else { |
| 205 | printf("gzgets() after gzseek: %s\n", (char*)uncompr); |
| 206 | } |
| 207 | |
| 208 | gzclose(file); |
| 209 | #endif |
| 210 | } |
| 211 | |
| 212 | #endif /* Z_SOLO */ |
| 213 | |
| 214 | /* =========================================================================== |
| 215 | * Test deflate() with small buffers |
| 216 | */ |
| 217 | void test_deflate(compr, comprLen) |
| 218 | Byte *compr; |
| 219 | uLong comprLen; |
| 220 | { |
| 221 | z_stream c_stream; /* compression stream */ |
| 222 | int err; |
| 223 | uLong len = (uLong)strlen(hello)+1; |
| 224 | |
| 225 | c_stream.zalloc = zalloc; |
| 226 | c_stream.zfree = zfree; |
| 227 | c_stream.opaque = (voidpf)0; |
| 228 | |
| 229 | err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION); |
| 230 | CHECK_ERR(err, "deflateInit"); |
| 231 | |
| 232 | c_stream.next_in = (z_const unsigned char *)hello; |
| 233 | c_stream.next_out = compr; |
| 234 | |
| 235 | while (c_stream.total_in != len && c_stream.total_out < comprLen) { |
| 236 | c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */ |
| 237 | err = deflate(&c_stream, Z_NO_FLUSH); |
| 238 | CHECK_ERR(err, "deflate"); |
| 239 | } |
| 240 | /* Finish the stream, still forcing small buffers: */ |
| 241 | for (;;) { |
| 242 | c_stream.avail_out = 1; |
| 243 | err = deflate(&c_stream, Z_FINISH); |
| 244 | if (err == Z_STREAM_END) break; |
| 245 | CHECK_ERR(err, "deflate"); |
| 246 | } |
| 247 | |
| 248 | err = deflateEnd(&c_stream); |
| 249 | CHECK_ERR(err, "deflateEnd"); |
| 250 | } |
| 251 | |
| 252 | /* =========================================================================== |
| 253 | * Test inflate() with small buffers |
| 254 | */ |
| 255 | void test_inflate(compr, comprLen, uncompr, uncomprLen) |
| 256 | Byte *compr, *uncompr; |
| 257 | uLong comprLen, uncomprLen; |
| 258 | { |
| 259 | int err; |
| 260 | z_stream d_stream; /* decompression stream */ |
| 261 | |
| 262 | strcpy((char*)uncompr, "garbage"); |
| 263 | |
| 264 | d_stream.zalloc = zalloc; |
| 265 | d_stream.zfree = zfree; |
| 266 | d_stream.opaque = (voidpf)0; |
| 267 | |
| 268 | d_stream.next_in = compr; |
| 269 | d_stream.avail_in = 0; |
| 270 | d_stream.next_out = uncompr; |
| 271 | |
| 272 | err = inflateInit(&d_stream); |
| 273 | CHECK_ERR(err, "inflateInit"); |
| 274 | |
| 275 | while (d_stream.total_out < uncomprLen && d_stream.total_in < comprLen) { |
| 276 | d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */ |
| 277 | err = inflate(&d_stream, Z_NO_FLUSH); |
| 278 | if (err == Z_STREAM_END) break; |
| 279 | CHECK_ERR(err, "inflate"); |
| 280 | } |
| 281 | |
| 282 | err = inflateEnd(&d_stream); |
| 283 | CHECK_ERR(err, "inflateEnd"); |
| 284 | |
| 285 | if (strcmp((char*)uncompr, hello)) { |
| 286 | fprintf(stderr, "bad inflate\n"); |
| 287 | exit(1); |
| 288 | } else { |
| 289 | printf("inflate(): %s\n", (char *)uncompr); |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | /* =========================================================================== |
| 294 | * Test deflate() with large buffers and dynamic change of compression level |
| 295 | */ |
| 296 | void test_large_deflate(compr, comprLen, uncompr, uncomprLen) |
| 297 | Byte *compr, *uncompr; |
| 298 | uLong comprLen, uncomprLen; |
| 299 | { |
| 300 | z_stream c_stream; /* compression stream */ |
| 301 | int err; |
| 302 | |
| 303 | c_stream.zalloc = zalloc; |
| 304 | c_stream.zfree = zfree; |
| 305 | c_stream.opaque = (voidpf)0; |
| 306 | |
| 307 | err = deflateInit(&c_stream, Z_BEST_SPEED); |
| 308 | CHECK_ERR(err, "deflateInit"); |
| 309 | |
| 310 | c_stream.next_out = compr; |
| 311 | c_stream.avail_out = (uInt)comprLen; |
| 312 | |
| 313 | /* At this point, uncompr is still mostly zeroes, so it should compress |
| 314 | * very well: |
| 315 | */ |
| 316 | c_stream.next_in = uncompr; |
| 317 | c_stream.avail_in = (uInt)uncomprLen; |
| 318 | err = deflate(&c_stream, Z_NO_FLUSH); |
| 319 | CHECK_ERR(err, "deflate"); |
| 320 | if (c_stream.avail_in != 0) { |
| 321 | fprintf(stderr, "deflate not greedy\n"); |
| 322 | exit(1); |
| 323 | } |
| 324 | |
| 325 | /* Feed in already compressed data and switch to no compression: */ |
| 326 | deflateParams(&c_stream, Z_NO_COMPRESSION, Z_DEFAULT_STRATEGY); |
| 327 | c_stream.next_in = compr; |
| 328 | c_stream.avail_in = (uInt)comprLen/2; |
| 329 | err = deflate(&c_stream, Z_NO_FLUSH); |
| 330 | CHECK_ERR(err, "deflate"); |
| 331 | |
| 332 | /* Switch back to compressing mode: */ |
| 333 | deflateParams(&c_stream, Z_BEST_COMPRESSION, Z_FILTERED); |
| 334 | c_stream.next_in = uncompr; |
| 335 | c_stream.avail_in = (uInt)uncomprLen; |
| 336 | err = deflate(&c_stream, Z_NO_FLUSH); |
| 337 | CHECK_ERR(err, "deflate"); |
| 338 | |
| 339 | err = deflate(&c_stream, Z_FINISH); |
| 340 | if (err != Z_STREAM_END) { |
| 341 | fprintf(stderr, "deflate should report Z_STREAM_END\n"); |
| 342 | exit(1); |
| 343 | } |
| 344 | err = deflateEnd(&c_stream); |
| 345 | CHECK_ERR(err, "deflateEnd"); |
| 346 | } |
| 347 | |
| 348 | /* =========================================================================== |
| 349 | * Test inflate() with large buffers |
| 350 | */ |
| 351 | void test_large_inflate(compr, comprLen, uncompr, uncomprLen) |
| 352 | Byte *compr, *uncompr; |
| 353 | uLong comprLen, uncomprLen; |
| 354 | { |
| 355 | int err; |
| 356 | z_stream d_stream; /* decompression stream */ |
| 357 | |
| 358 | strcpy((char*)uncompr, "garbage"); |
| 359 | |
| 360 | d_stream.zalloc = zalloc; |
| 361 | d_stream.zfree = zfree; |
| 362 | d_stream.opaque = (voidpf)0; |
| 363 | |
| 364 | d_stream.next_in = compr; |
| 365 | d_stream.avail_in = (uInt)comprLen; |
| 366 | |
| 367 | err = inflateInit(&d_stream); |
| 368 | CHECK_ERR(err, "inflateInit"); |
| 369 | |
| 370 | for (;;) { |
| 371 | d_stream.next_out = uncompr; /* discard the output */ |
| 372 | d_stream.avail_out = (uInt)uncomprLen; |
| 373 | err = inflate(&d_stream, Z_NO_FLUSH); |
| 374 | if (err == Z_STREAM_END) break; |
| 375 | CHECK_ERR(err, "large inflate"); |
| 376 | } |
| 377 | |
| 378 | err = inflateEnd(&d_stream); |
| 379 | CHECK_ERR(err, "inflateEnd"); |
| 380 | |
| 381 | if (d_stream.total_out != 2*uncomprLen + comprLen/2) { |
| 382 | fprintf(stderr, "bad large inflate: %ld\n", d_stream.total_out); |
| 383 | exit(1); |
| 384 | } else { |
| 385 | printf("large_inflate(): OK\n"); |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | /* =========================================================================== |
| 390 | * Test deflate() with full flush |
| 391 | */ |
| 392 | void test_flush(compr, comprLen) |
| 393 | Byte *compr; |
| 394 | uLong *comprLen; |
| 395 | { |
| 396 | z_stream c_stream; /* compression stream */ |
| 397 | int err; |
| 398 | uInt len = (uInt)strlen(hello)+1; |
| 399 | |
| 400 | c_stream.zalloc = zalloc; |
| 401 | c_stream.zfree = zfree; |
| 402 | c_stream.opaque = (voidpf)0; |
| 403 | |
| 404 | err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION); |
| 405 | CHECK_ERR(err, "deflateInit"); |
| 406 | |
| 407 | c_stream.next_in = (z_const unsigned char *)hello; |
| 408 | c_stream.next_out = compr; |
| 409 | c_stream.avail_in = 3; |
| 410 | c_stream.avail_out = (uInt)*comprLen; |
| 411 | err = deflate(&c_stream, Z_FULL_FLUSH); |
| 412 | CHECK_ERR(err, "deflate"); |
| 413 | |
| 414 | compr[3]++; /* force an error in first compressed block */ |
| 415 | c_stream.avail_in = len - 3; |
| 416 | |
| 417 | err = deflate(&c_stream, Z_FINISH); |
| 418 | if (err != Z_STREAM_END) { |
| 419 | CHECK_ERR(err, "deflate"); |
| 420 | } |
| 421 | err = deflateEnd(&c_stream); |
| 422 | CHECK_ERR(err, "deflateEnd"); |
| 423 | |
| 424 | *comprLen = c_stream.total_out; |
| 425 | } |
| 426 | |
| 427 | /* =========================================================================== |
| 428 | * Test inflateSync() |
| 429 | */ |
| 430 | void test_sync(compr, comprLen, uncompr, uncomprLen) |
| 431 | Byte *compr, *uncompr; |
| 432 | uLong comprLen, uncomprLen; |
| 433 | { |
| 434 | int err; |
| 435 | z_stream d_stream; /* decompression stream */ |
| 436 | |
| 437 | strcpy((char*)uncompr, "garbage"); |
| 438 | |
| 439 | d_stream.zalloc = zalloc; |
| 440 | d_stream.zfree = zfree; |
| 441 | d_stream.opaque = (voidpf)0; |
| 442 | |
| 443 | d_stream.next_in = compr; |
| 444 | d_stream.avail_in = 2; /* just read the zlib header */ |
| 445 | |
| 446 | err = inflateInit(&d_stream); |
| 447 | CHECK_ERR(err, "inflateInit"); |
| 448 | |
| 449 | d_stream.next_out = uncompr; |
| 450 | d_stream.avail_out = (uInt)uncomprLen; |
| 451 | |
| 452 | inflate(&d_stream, Z_NO_FLUSH); |
| 453 | CHECK_ERR(err, "inflate"); |
| 454 | |
| 455 | d_stream.avail_in = (uInt)comprLen-2; /* read all compressed data */ |
| 456 | err = inflateSync(&d_stream); /* but skip the damaged part */ |
| 457 | CHECK_ERR(err, "inflateSync"); |
| 458 | |
| 459 | err = inflate(&d_stream, Z_FINISH); |
| 460 | if (err != Z_DATA_ERROR) { |
| 461 | fprintf(stderr, "inflate should report DATA_ERROR\n"); |
| 462 | /* Because of incorrect adler32 */ |
| 463 | exit(1); |
| 464 | } |
| 465 | err = inflateEnd(&d_stream); |
| 466 | CHECK_ERR(err, "inflateEnd"); |
| 467 | |
| 468 | printf("after inflateSync(): hel%s\n", (char *)uncompr); |
| 469 | } |
| 470 | |
| 471 | /* =========================================================================== |
| 472 | * Test deflate() with preset dictionary |
| 473 | */ |
| 474 | void test_dict_deflate(compr, comprLen) |
| 475 | Byte *compr; |
| 476 | uLong comprLen; |
| 477 | { |
| 478 | z_stream c_stream; /* compression stream */ |
| 479 | int err; |
| 480 | |
| 481 | c_stream.zalloc = zalloc; |
| 482 | c_stream.zfree = zfree; |
| 483 | c_stream.opaque = (voidpf)0; |
| 484 | |
| 485 | err = deflateInit(&c_stream, Z_BEST_COMPRESSION); |
| 486 | CHECK_ERR(err, "deflateInit"); |
| 487 | |
| 488 | err = deflateSetDictionary(&c_stream, |
| 489 | (const Bytef*)dictionary, (int)sizeof(dictionary)); |
| 490 | CHECK_ERR(err, "deflateSetDictionary"); |
| 491 | |
| 492 | dictId = c_stream.adler; |
| 493 | c_stream.next_out = compr; |
| 494 | c_stream.avail_out = (uInt)comprLen; |
| 495 | |
| 496 | c_stream.next_in = (z_const unsigned char *)hello; |
| 497 | c_stream.avail_in = (uInt)strlen(hello)+1; |
| 498 | |
| 499 | err = deflate(&c_stream, Z_FINISH); |
| 500 | if (err != Z_STREAM_END) { |
| 501 | fprintf(stderr, "deflate should report Z_STREAM_END\n"); |
| 502 | exit(1); |
| 503 | } |
| 504 | err = deflateEnd(&c_stream); |
| 505 | CHECK_ERR(err, "deflateEnd"); |
| 506 | } |
| 507 | |
| 508 | /* =========================================================================== |
| 509 | * Test inflate() with a preset dictionary |
| 510 | */ |
| 511 | void test_dict_inflate(compr, comprLen, uncompr, uncomprLen) |
| 512 | Byte *compr, *uncompr; |
| 513 | uLong comprLen, uncomprLen; |
| 514 | { |
| 515 | int err; |
| 516 | z_stream d_stream; /* decompression stream */ |
| 517 | |
| 518 | strcpy((char*)uncompr, "garbage"); |
| 519 | |
| 520 | d_stream.zalloc = zalloc; |
| 521 | d_stream.zfree = zfree; |
| 522 | d_stream.opaque = (voidpf)0; |
| 523 | |
| 524 | d_stream.next_in = compr; |
| 525 | d_stream.avail_in = (uInt)comprLen; |
| 526 | |
| 527 | err = inflateInit(&d_stream); |
| 528 | CHECK_ERR(err, "inflateInit"); |
| 529 | |
| 530 | d_stream.next_out = uncompr; |
| 531 | d_stream.avail_out = (uInt)uncomprLen; |
| 532 | |
| 533 | for (;;) { |
| 534 | err = inflate(&d_stream, Z_NO_FLUSH); |
| 535 | if (err == Z_STREAM_END) break; |
| 536 | if (err == Z_NEED_DICT) { |
| 537 | if (d_stream.adler != dictId) { |
| 538 | fprintf(stderr, "unexpected dictionary"); |
| 539 | exit(1); |
| 540 | } |
| 541 | err = inflateSetDictionary(&d_stream, (const Bytef*)dictionary, |
| 542 | (int)sizeof(dictionary)); |
| 543 | } |
| 544 | CHECK_ERR(err, "inflate with dict"); |
| 545 | } |
| 546 | |
| 547 | err = inflateEnd(&d_stream); |
| 548 | CHECK_ERR(err, "inflateEnd"); |
| 549 | |
| 550 | if (strcmp((char*)uncompr, hello)) { |
| 551 | fprintf(stderr, "bad inflate with dict\n"); |
| 552 | exit(1); |
| 553 | } else { |
| 554 | printf("inflate with dictionary: %s\n", (char *)uncompr); |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | /* =========================================================================== |
| 559 | * Usage: example [output.gz [input.gz]] |
| 560 | */ |
| 561 | |
| 562 | int main(argc, argv) |
| 563 | int argc; |
| 564 | char *argv[]; |
| 565 | { |
| 566 | Byte *compr, *uncompr; |
| 567 | uLong comprLen = 10000*sizeof(int); /* don't overflow on MSDOS */ |
| 568 | uLong uncomprLen = comprLen; |
| 569 | static const char* myVersion = ZLIB_VERSION; |
| 570 | |
| 571 | if (zlibVersion()[0] != myVersion[0]) { |
| 572 | fprintf(stderr, "incompatible zlib version\n"); |
| 573 | exit(1); |
| 574 | |
| 575 | } else if (strcmp(zlibVersion(), ZLIB_VERSION) != 0) { |
| 576 | fprintf(stderr, "warning: different zlib version\n"); |
| 577 | } |
| 578 | |
| 579 | printf("zlib version %s = 0x%04x, compile flags = 0x%lx\n", |
| 580 | ZLIB_VERSION, ZLIB_VERNUM, zlibCompileFlags()); |
| 581 | |
| 582 | compr = (Byte*)calloc((uInt)comprLen, 1); |
| 583 | uncompr = (Byte*)calloc((uInt)uncomprLen, 1); |
| 584 | /* compr and uncompr are cleared to avoid reading uninitialized |
| 585 | * data and to ensure that uncompr compresses well. |
| 586 | */ |
| 587 | if (compr == Z_NULL || uncompr == Z_NULL) { |
| 588 | printf("out of memory\n"); |
| 589 | exit(1); |
| 590 | } |
| 591 | |
| 592 | #ifdef Z_SOLO |
| 593 | argc = strlen(argv[0]); |
| 594 | #else |
| 595 | test_compress(compr, comprLen, uncompr, uncomprLen); |
| 596 | |
| 597 | test_gzio((argc > 1 ? argv[1] : TESTFILE), |
| 598 | uncompr, uncomprLen); |
| 599 | #endif |
| 600 | |
| 601 | test_deflate(compr, comprLen); |
| 602 | test_inflate(compr, comprLen, uncompr, uncomprLen); |
| 603 | |
| 604 | test_large_deflate(compr, comprLen, uncompr, uncomprLen); |
| 605 | test_large_inflate(compr, comprLen, uncompr, uncomprLen); |
| 606 | |
| 607 | test_flush(compr, &comprLen); |
| 608 | test_sync(compr, comprLen, uncompr, uncomprLen); |
| 609 | comprLen = uncomprLen; |
| 610 | |
| 611 | test_dict_deflate(compr, comprLen); |
| 612 | test_dict_inflate(compr, comprLen, uncompr, uncomprLen); |
| 613 | |
| 614 | free(compr); |
| 615 | free(uncompr); |
| 616 | |
| 617 | return 0; |
| 618 | } |