| 1 |
745 |
jeremybenn |
/* example.c -- usage example of the zlib compression library
|
| 2 |
|
|
* Copyright (C) 1995-2004 Jean-loup Gailly.
|
| 3 |
|
|
* For conditions of distribution and use, see copyright notice in zlib.h
|
| 4 |
|
|
*/
|
| 5 |
|
|
|
| 6 |
|
|
/* @(#) $Id: example.c,v 1.1.1.2 2002/03/11 21:53:23 tromey Exp $ */
|
| 7 |
|
|
|
| 8 |
|
|
#include <stdio.h>
|
| 9 |
|
|
#include "zlib.h"
|
| 10 |
|
|
|
| 11 |
|
|
#ifdef STDC
|
| 12 |
|
|
# include <string.h>
|
| 13 |
|
|
# include <stdlib.h>
|
| 14 |
|
|
#endif
|
| 15 |
|
|
|
| 16 |
|
|
#if defined(VMS) || defined(RISCOS)
|
| 17 |
|
|
# define TESTFILE "foo-gz"
|
| 18 |
|
|
#else
|
| 19 |
|
|
# define TESTFILE "foo.gz"
|
| 20 |
|
|
#endif
|
| 21 |
|
|
|
| 22 |
|
|
#define CHECK_ERR(err, msg) { \
|
| 23 |
|
|
if (err != Z_OK) { \
|
| 24 |
|
|
fprintf(stderr, "%s error: %d\n", msg, err); \
|
| 25 |
|
|
exit(1); \
|
| 26 |
|
|
} \
|
| 27 |
|
|
}
|
| 28 |
|
|
|
| 29 |
|
|
const char hello[] = "hello, hello!";
|
| 30 |
|
|
/* "hello world" would be more standard, but the repeated "hello"
|
| 31 |
|
|
* stresses the compression code better, sorry...
|
| 32 |
|
|
*/
|
| 33 |
|
|
|
| 34 |
|
|
const char dictionary[] = "hello";
|
| 35 |
|
|
uLong dictId; /* Adler32 value of the dictionary */
|
| 36 |
|
|
|
| 37 |
|
|
void test_compress OF((Byte *compr, uLong comprLen,
|
| 38 |
|
|
Byte *uncompr, uLong uncomprLen));
|
| 39 |
|
|
void test_gzio OF((const char *fname,
|
| 40 |
|
|
Byte *uncompr, uLong uncomprLen));
|
| 41 |
|
|
void test_deflate OF((Byte *compr, uLong comprLen));
|
| 42 |
|
|
void test_inflate OF((Byte *compr, uLong comprLen,
|
| 43 |
|
|
Byte *uncompr, uLong uncomprLen));
|
| 44 |
|
|
void test_large_deflate OF((Byte *compr, uLong comprLen,
|
| 45 |
|
|
Byte *uncompr, uLong uncomprLen));
|
| 46 |
|
|
void test_large_inflate OF((Byte *compr, uLong comprLen,
|
| 47 |
|
|
Byte *uncompr, uLong uncomprLen));
|
| 48 |
|
|
void test_flush OF((Byte *compr, uLong *comprLen));
|
| 49 |
|
|
void test_sync OF((Byte *compr, uLong comprLen,
|
| 50 |
|
|
Byte *uncompr, uLong uncomprLen));
|
| 51 |
|
|
void test_dict_deflate OF((Byte *compr, uLong comprLen));
|
| 52 |
|
|
void test_dict_inflate OF((Byte *compr, uLong comprLen,
|
| 53 |
|
|
Byte *uncompr, uLong uncomprLen));
|
| 54 |
|
|
int main OF((int argc, char *argv[]));
|
| 55 |
|
|
|
| 56 |
|
|
/* ===========================================================================
|
| 57 |
|
|
* Test compress() and uncompress()
|
| 58 |
|
|
*/
|
| 59 |
|
|
void test_compress(compr, comprLen, uncompr, uncomprLen)
|
| 60 |
|
|
Byte *compr, *uncompr;
|
| 61 |
|
|
uLong comprLen, uncomprLen;
|
| 62 |
|
|
{
|
| 63 |
|
|
int err;
|
| 64 |
|
|
uLong len = (uLong)strlen(hello)+1;
|
| 65 |
|
|
|
| 66 |
|
|
err = compress(compr, &comprLen, (const Bytef*)hello, len);
|
| 67 |
|
|
CHECK_ERR(err, "compress");
|
| 68 |
|
|
|
| 69 |
|
|
strcpy((char*)uncompr, "garbage");
|
| 70 |
|
|
|
| 71 |
|
|
err = uncompress(uncompr, &uncomprLen, compr, comprLen);
|
| 72 |
|
|
CHECK_ERR(err, "uncompress");
|
| 73 |
|
|
|
| 74 |
|
|
if (strcmp((char*)uncompr, hello)) {
|
| 75 |
|
|
fprintf(stderr, "bad uncompress\n");
|
| 76 |
|
|
exit(1);
|
| 77 |
|
|
} else {
|
| 78 |
|
|
printf("uncompress(): %s\n", (char *)uncompr);
|
| 79 |
|
|
}
|
| 80 |
|
|
}
|
| 81 |
|
|
|
| 82 |
|
|
/* ===========================================================================
|
| 83 |
|
|
* Test read/write of .gz files
|
| 84 |
|
|
*/
|
| 85 |
|
|
void test_gzio(fname, uncompr, uncomprLen)
|
| 86 |
|
|
const char *fname; /* compressed file name */
|
| 87 |
|
|
Byte *uncompr;
|
| 88 |
|
|
uLong uncomprLen;
|
| 89 |
|
|
{
|
| 90 |
|
|
#ifdef NO_GZCOMPRESS
|
| 91 |
|
|
fprintf(stderr, "NO_GZCOMPRESS -- gz* functions cannot compress\n");
|
| 92 |
|
|
#else
|
| 93 |
|
|
int err;
|
| 94 |
|
|
int len = (int)strlen(hello)+1;
|
| 95 |
|
|
gzFile file;
|
| 96 |
|
|
z_off_t pos;
|
| 97 |
|
|
|
| 98 |
|
|
file = gzopen(fname, "wb");
|
| 99 |
|
|
if (file == NULL) {
|
| 100 |
|
|
fprintf(stderr, "gzopen error\n");
|
| 101 |
|
|
exit(1);
|
| 102 |
|
|
}
|
| 103 |
|
|
gzputc(file, 'h');
|
| 104 |
|
|
if (gzputs(file, "ello") != 4) {
|
| 105 |
|
|
fprintf(stderr, "gzputs err: %s\n", gzerror(file, &err));
|
| 106 |
|
|
exit(1);
|
| 107 |
|
|
}
|
| 108 |
|
|
if (gzprintf(file, ", %s!", "hello") != 8) {
|
| 109 |
|
|
fprintf(stderr, "gzprintf err: %s\n", gzerror(file, &err));
|
| 110 |
|
|
exit(1);
|
| 111 |
|
|
}
|
| 112 |
|
|
gzseek(file, 1L, SEEK_CUR); /* add one zero byte */
|
| 113 |
|
|
gzclose(file);
|
| 114 |
|
|
|
| 115 |
|
|
file = gzopen(fname, "rb");
|
| 116 |
|
|
if (file == NULL) {
|
| 117 |
|
|
fprintf(stderr, "gzopen error\n");
|
| 118 |
|
|
exit(1);
|
| 119 |
|
|
}
|
| 120 |
|
|
strcpy((char*)uncompr, "garbage");
|
| 121 |
|
|
|
| 122 |
|
|
if (gzread(file, uncompr, (unsigned)uncomprLen) != len) {
|
| 123 |
|
|
fprintf(stderr, "gzread err: %s\n", gzerror(file, &err));
|
| 124 |
|
|
exit(1);
|
| 125 |
|
|
}
|
| 126 |
|
|
if (strcmp((char*)uncompr, hello)) {
|
| 127 |
|
|
fprintf(stderr, "bad gzread: %s\n", (char*)uncompr);
|
| 128 |
|
|
exit(1);
|
| 129 |
|
|
} else {
|
| 130 |
|
|
printf("gzread(): %s\n", (char*)uncompr);
|
| 131 |
|
|
}
|
| 132 |
|
|
|
| 133 |
|
|
pos = gzseek(file, -8L, SEEK_CUR);
|
| 134 |
|
|
if (pos != 6 || gztell(file) != pos) {
|
| 135 |
|
|
fprintf(stderr, "gzseek error, pos=%ld, gztell=%ld\n",
|
| 136 |
|
|
(long)pos, (long)gztell(file));
|
| 137 |
|
|
exit(1);
|
| 138 |
|
|
}
|
| 139 |
|
|
|
| 140 |
|
|
if (gzgetc(file) != ' ') {
|
| 141 |
|
|
fprintf(stderr, "gzgetc error\n");
|
| 142 |
|
|
exit(1);
|
| 143 |
|
|
}
|
| 144 |
|
|
|
| 145 |
|
|
if (gzungetc(' ', file) != ' ') {
|
| 146 |
|
|
fprintf(stderr, "gzungetc error\n");
|
| 147 |
|
|
exit(1);
|
| 148 |
|
|
}
|
| 149 |
|
|
|
| 150 |
|
|
gzgets(file, (char*)uncompr, (int)uncomprLen);
|
| 151 |
|
|
if (strlen((char*)uncompr) != 7) { /* " hello!" */
|
| 152 |
|
|
fprintf(stderr, "gzgets err after gzseek: %s\n", gzerror(file, &err));
|
| 153 |
|
|
exit(1);
|
| 154 |
|
|
}
|
| 155 |
|
|
if (strcmp((char*)uncompr, hello + 6)) {
|
| 156 |
|
|
fprintf(stderr, "bad gzgets after gzseek\n");
|
| 157 |
|
|
exit(1);
|
| 158 |
|
|
} else {
|
| 159 |
|
|
printf("gzgets() after gzseek: %s\n", (char*)uncompr);
|
| 160 |
|
|
}
|
| 161 |
|
|
|
| 162 |
|
|
gzclose(file);
|
| 163 |
|
|
#endif
|
| 164 |
|
|
}
|
| 165 |
|
|
|
| 166 |
|
|
/* ===========================================================================
|
| 167 |
|
|
* Test deflate() with small buffers
|
| 168 |
|
|
*/
|
| 169 |
|
|
void test_deflate(compr, comprLen)
|
| 170 |
|
|
Byte *compr;
|
| 171 |
|
|
uLong comprLen;
|
| 172 |
|
|
{
|
| 173 |
|
|
z_stream c_stream; /* compression stream */
|
| 174 |
|
|
int err;
|
| 175 |
|
|
uLong len = (uLong)strlen(hello)+1;
|
| 176 |
|
|
|
| 177 |
|
|
c_stream.zalloc = (alloc_func)0;
|
| 178 |
|
|
c_stream.zfree = (free_func)0;
|
| 179 |
|
|
c_stream.opaque = (voidpf)0;
|
| 180 |
|
|
|
| 181 |
|
|
err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
|
| 182 |
|
|
CHECK_ERR(err, "deflateInit");
|
| 183 |
|
|
|
| 184 |
|
|
c_stream.next_in = (Bytef*)hello;
|
| 185 |
|
|
c_stream.next_out = compr;
|
| 186 |
|
|
|
| 187 |
|
|
while (c_stream.total_in != len && c_stream.total_out < comprLen) {
|
| 188 |
|
|
c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */
|
| 189 |
|
|
err = deflate(&c_stream, Z_NO_FLUSH);
|
| 190 |
|
|
CHECK_ERR(err, "deflate");
|
| 191 |
|
|
}
|
| 192 |
|
|
/* Finish the stream, still forcing small buffers: */
|
| 193 |
|
|
for (;;) {
|
| 194 |
|
|
c_stream.avail_out = 1;
|
| 195 |
|
|
err = deflate(&c_stream, Z_FINISH);
|
| 196 |
|
|
if (err == Z_STREAM_END) break;
|
| 197 |
|
|
CHECK_ERR(err, "deflate");
|
| 198 |
|
|
}
|
| 199 |
|
|
|
| 200 |
|
|
err = deflateEnd(&c_stream);
|
| 201 |
|
|
CHECK_ERR(err, "deflateEnd");
|
| 202 |
|
|
}
|
| 203 |
|
|
|
| 204 |
|
|
/* ===========================================================================
|
| 205 |
|
|
* Test inflate() with small buffers
|
| 206 |
|
|
*/
|
| 207 |
|
|
void test_inflate(compr, comprLen, uncompr, uncomprLen)
|
| 208 |
|
|
Byte *compr, *uncompr;
|
| 209 |
|
|
uLong comprLen, uncomprLen;
|
| 210 |
|
|
{
|
| 211 |
|
|
int err;
|
| 212 |
|
|
z_stream d_stream; /* decompression stream */
|
| 213 |
|
|
|
| 214 |
|
|
strcpy((char*)uncompr, "garbage");
|
| 215 |
|
|
|
| 216 |
|
|
d_stream.zalloc = (alloc_func)0;
|
| 217 |
|
|
d_stream.zfree = (free_func)0;
|
| 218 |
|
|
d_stream.opaque = (voidpf)0;
|
| 219 |
|
|
|
| 220 |
|
|
d_stream.next_in = compr;
|
| 221 |
|
|
d_stream.avail_in = 0;
|
| 222 |
|
|
d_stream.next_out = uncompr;
|
| 223 |
|
|
|
| 224 |
|
|
err = inflateInit(&d_stream);
|
| 225 |
|
|
CHECK_ERR(err, "inflateInit");
|
| 226 |
|
|
|
| 227 |
|
|
while (d_stream.total_out < uncomprLen && d_stream.total_in < comprLen) {
|
| 228 |
|
|
d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */
|
| 229 |
|
|
err = inflate(&d_stream, Z_NO_FLUSH);
|
| 230 |
|
|
if (err == Z_STREAM_END) break;
|
| 231 |
|
|
CHECK_ERR(err, "inflate");
|
| 232 |
|
|
}
|
| 233 |
|
|
|
| 234 |
|
|
err = inflateEnd(&d_stream);
|
| 235 |
|
|
CHECK_ERR(err, "inflateEnd");
|
| 236 |
|
|
|
| 237 |
|
|
if (strcmp((char*)uncompr, hello)) {
|
| 238 |
|
|
fprintf(stderr, "bad inflate\n");
|
| 239 |
|
|
exit(1);
|
| 240 |
|
|
} else {
|
| 241 |
|
|
printf("inflate(): %s\n", (char *)uncompr);
|
| 242 |
|
|
}
|
| 243 |
|
|
}
|
| 244 |
|
|
|
| 245 |
|
|
/* ===========================================================================
|
| 246 |
|
|
* Test deflate() with large buffers and dynamic change of compression level
|
| 247 |
|
|
*/
|
| 248 |
|
|
void test_large_deflate(compr, comprLen, uncompr, uncomprLen)
|
| 249 |
|
|
Byte *compr, *uncompr;
|
| 250 |
|
|
uLong comprLen, uncomprLen;
|
| 251 |
|
|
{
|
| 252 |
|
|
z_stream c_stream; /* compression stream */
|
| 253 |
|
|
int err;
|
| 254 |
|
|
|
| 255 |
|
|
c_stream.zalloc = (alloc_func)0;
|
| 256 |
|
|
c_stream.zfree = (free_func)0;
|
| 257 |
|
|
c_stream.opaque = (voidpf)0;
|
| 258 |
|
|
|
| 259 |
|
|
err = deflateInit(&c_stream, Z_BEST_SPEED);
|
| 260 |
|
|
CHECK_ERR(err, "deflateInit");
|
| 261 |
|
|
|
| 262 |
|
|
c_stream.next_out = compr;
|
| 263 |
|
|
c_stream.avail_out = (uInt)comprLen;
|
| 264 |
|
|
|
| 265 |
|
|
/* At this point, uncompr is still mostly zeroes, so it should compress
|
| 266 |
|
|
* very well:
|
| 267 |
|
|
*/
|
| 268 |
|
|
c_stream.next_in = uncompr;
|
| 269 |
|
|
c_stream.avail_in = (uInt)uncomprLen;
|
| 270 |
|
|
err = deflate(&c_stream, Z_NO_FLUSH);
|
| 271 |
|
|
CHECK_ERR(err, "deflate");
|
| 272 |
|
|
if (c_stream.avail_in != 0) {
|
| 273 |
|
|
fprintf(stderr, "deflate not greedy\n");
|
| 274 |
|
|
exit(1);
|
| 275 |
|
|
}
|
| 276 |
|
|
|
| 277 |
|
|
/* Feed in already compressed data and switch to no compression: */
|
| 278 |
|
|
deflateParams(&c_stream, Z_NO_COMPRESSION, Z_DEFAULT_STRATEGY);
|
| 279 |
|
|
c_stream.next_in = compr;
|
| 280 |
|
|
c_stream.avail_in = (uInt)comprLen/2;
|
| 281 |
|
|
err = deflate(&c_stream, Z_NO_FLUSH);
|
| 282 |
|
|
CHECK_ERR(err, "deflate");
|
| 283 |
|
|
|
| 284 |
|
|
/* Switch back to compressing mode: */
|
| 285 |
|
|
deflateParams(&c_stream, Z_BEST_COMPRESSION, Z_FILTERED);
|
| 286 |
|
|
c_stream.next_in = uncompr;
|
| 287 |
|
|
c_stream.avail_in = (uInt)uncomprLen;
|
| 288 |
|
|
err = deflate(&c_stream, Z_NO_FLUSH);
|
| 289 |
|
|
CHECK_ERR(err, "deflate");
|
| 290 |
|
|
|
| 291 |
|
|
err = deflate(&c_stream, Z_FINISH);
|
| 292 |
|
|
if (err != Z_STREAM_END) {
|
| 293 |
|
|
fprintf(stderr, "deflate should report Z_STREAM_END\n");
|
| 294 |
|
|
exit(1);
|
| 295 |
|
|
}
|
| 296 |
|
|
err = deflateEnd(&c_stream);
|
| 297 |
|
|
CHECK_ERR(err, "deflateEnd");
|
| 298 |
|
|
}
|
| 299 |
|
|
|
| 300 |
|
|
/* ===========================================================================
|
| 301 |
|
|
* Test inflate() with large buffers
|
| 302 |
|
|
*/
|
| 303 |
|
|
void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
|
| 304 |
|
|
Byte *compr, *uncompr;
|
| 305 |
|
|
uLong comprLen, uncomprLen;
|
| 306 |
|
|
{
|
| 307 |
|
|
int err;
|
| 308 |
|
|
z_stream d_stream; /* decompression stream */
|
| 309 |
|
|
|
| 310 |
|
|
strcpy((char*)uncompr, "garbage");
|
| 311 |
|
|
|
| 312 |
|
|
d_stream.zalloc = (alloc_func)0;
|
| 313 |
|
|
d_stream.zfree = (free_func)0;
|
| 314 |
|
|
d_stream.opaque = (voidpf)0;
|
| 315 |
|
|
|
| 316 |
|
|
d_stream.next_in = compr;
|
| 317 |
|
|
d_stream.avail_in = (uInt)comprLen;
|
| 318 |
|
|
|
| 319 |
|
|
err = inflateInit(&d_stream);
|
| 320 |
|
|
CHECK_ERR(err, "inflateInit");
|
| 321 |
|
|
|
| 322 |
|
|
for (;;) {
|
| 323 |
|
|
d_stream.next_out = uncompr; /* discard the output */
|
| 324 |
|
|
d_stream.avail_out = (uInt)uncomprLen;
|
| 325 |
|
|
err = inflate(&d_stream, Z_NO_FLUSH);
|
| 326 |
|
|
if (err == Z_STREAM_END) break;
|
| 327 |
|
|
CHECK_ERR(err, "large inflate");
|
| 328 |
|
|
}
|
| 329 |
|
|
|
| 330 |
|
|
err = inflateEnd(&d_stream);
|
| 331 |
|
|
CHECK_ERR(err, "inflateEnd");
|
| 332 |
|
|
|
| 333 |
|
|
if (d_stream.total_out != 2*uncomprLen + comprLen/2) {
|
| 334 |
|
|
fprintf(stderr, "bad large inflate: %ld\n", d_stream.total_out);
|
| 335 |
|
|
exit(1);
|
| 336 |
|
|
} else {
|
| 337 |
|
|
printf("large_inflate(): OK\n");
|
| 338 |
|
|
}
|
| 339 |
|
|
}
|
| 340 |
|
|
|
| 341 |
|
|
/* ===========================================================================
|
| 342 |
|
|
* Test deflate() with full flush
|
| 343 |
|
|
*/
|
| 344 |
|
|
void test_flush(compr, comprLen)
|
| 345 |
|
|
Byte *compr;
|
| 346 |
|
|
uLong *comprLen;
|
| 347 |
|
|
{
|
| 348 |
|
|
z_stream c_stream; /* compression stream */
|
| 349 |
|
|
int err;
|
| 350 |
|
|
uInt len = (uInt)strlen(hello)+1;
|
| 351 |
|
|
|
| 352 |
|
|
c_stream.zalloc = (alloc_func)0;
|
| 353 |
|
|
c_stream.zfree = (free_func)0;
|
| 354 |
|
|
c_stream.opaque = (voidpf)0;
|
| 355 |
|
|
|
| 356 |
|
|
err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
|
| 357 |
|
|
CHECK_ERR(err, "deflateInit");
|
| 358 |
|
|
|
| 359 |
|
|
c_stream.next_in = (Bytef*)hello;
|
| 360 |
|
|
c_stream.next_out = compr;
|
| 361 |
|
|
c_stream.avail_in = 3;
|
| 362 |
|
|
c_stream.avail_out = (uInt)*comprLen;
|
| 363 |
|
|
err = deflate(&c_stream, Z_FULL_FLUSH);
|
| 364 |
|
|
CHECK_ERR(err, "deflate");
|
| 365 |
|
|
|
| 366 |
|
|
compr[3]++; /* force an error in first compressed block */
|
| 367 |
|
|
c_stream.avail_in = len - 3;
|
| 368 |
|
|
|
| 369 |
|
|
err = deflate(&c_stream, Z_FINISH);
|
| 370 |
|
|
if (err != Z_STREAM_END) {
|
| 371 |
|
|
CHECK_ERR(err, "deflate");
|
| 372 |
|
|
}
|
| 373 |
|
|
err = deflateEnd(&c_stream);
|
| 374 |
|
|
CHECK_ERR(err, "deflateEnd");
|
| 375 |
|
|
|
| 376 |
|
|
*comprLen = c_stream.total_out;
|
| 377 |
|
|
}
|
| 378 |
|
|
|
| 379 |
|
|
/* ===========================================================================
|
| 380 |
|
|
* Test inflateSync()
|
| 381 |
|
|
*/
|
| 382 |
|
|
void test_sync(compr, comprLen, uncompr, uncomprLen)
|
| 383 |
|
|
Byte *compr, *uncompr;
|
| 384 |
|
|
uLong comprLen, uncomprLen;
|
| 385 |
|
|
{
|
| 386 |
|
|
int err;
|
| 387 |
|
|
z_stream d_stream; /* decompression stream */
|
| 388 |
|
|
|
| 389 |
|
|
strcpy((char*)uncompr, "garbage");
|
| 390 |
|
|
|
| 391 |
|
|
d_stream.zalloc = (alloc_func)0;
|
| 392 |
|
|
d_stream.zfree = (free_func)0;
|
| 393 |
|
|
d_stream.opaque = (voidpf)0;
|
| 394 |
|
|
|
| 395 |
|
|
d_stream.next_in = compr;
|
| 396 |
|
|
d_stream.avail_in = 2; /* just read the zlib header */
|
| 397 |
|
|
|
| 398 |
|
|
err = inflateInit(&d_stream);
|
| 399 |
|
|
CHECK_ERR(err, "inflateInit");
|
| 400 |
|
|
|
| 401 |
|
|
d_stream.next_out = uncompr;
|
| 402 |
|
|
d_stream.avail_out = (uInt)uncomprLen;
|
| 403 |
|
|
|
| 404 |
|
|
inflate(&d_stream, Z_NO_FLUSH);
|
| 405 |
|
|
CHECK_ERR(err, "inflate");
|
| 406 |
|
|
|
| 407 |
|
|
d_stream.avail_in = (uInt)comprLen-2; /* read all compressed data */
|
| 408 |
|
|
err = inflateSync(&d_stream); /* but skip the damaged part */
|
| 409 |
|
|
CHECK_ERR(err, "inflateSync");
|
| 410 |
|
|
|
| 411 |
|
|
err = inflate(&d_stream, Z_FINISH);
|
| 412 |
|
|
if (err != Z_DATA_ERROR) {
|
| 413 |
|
|
fprintf(stderr, "inflate should report DATA_ERROR\n");
|
| 414 |
|
|
/* Because of incorrect adler32 */
|
| 415 |
|
|
exit(1);
|
| 416 |
|
|
}
|
| 417 |
|
|
err = inflateEnd(&d_stream);
|
| 418 |
|
|
CHECK_ERR(err, "inflateEnd");
|
| 419 |
|
|
|
| 420 |
|
|
printf("after inflateSync(): hel%s\n", (char *)uncompr);
|
| 421 |
|
|
}
|
| 422 |
|
|
|
| 423 |
|
|
/* ===========================================================================
|
| 424 |
|
|
* Test deflate() with preset dictionary
|
| 425 |
|
|
*/
|
| 426 |
|
|
void test_dict_deflate(compr, comprLen)
|
| 427 |
|
|
Byte *compr;
|
| 428 |
|
|
uLong comprLen;
|
| 429 |
|
|
{
|
| 430 |
|
|
z_stream c_stream; /* compression stream */
|
| 431 |
|
|
int err;
|
| 432 |
|
|
|
| 433 |
|
|
c_stream.zalloc = (alloc_func)0;
|
| 434 |
|
|
c_stream.zfree = (free_func)0;
|
| 435 |
|
|
c_stream.opaque = (voidpf)0;
|
| 436 |
|
|
|
| 437 |
|
|
err = deflateInit(&c_stream, Z_BEST_COMPRESSION);
|
| 438 |
|
|
CHECK_ERR(err, "deflateInit");
|
| 439 |
|
|
|
| 440 |
|
|
err = deflateSetDictionary(&c_stream,
|
| 441 |
|
|
(const Bytef*)dictionary, sizeof(dictionary));
|
| 442 |
|
|
CHECK_ERR(err, "deflateSetDictionary");
|
| 443 |
|
|
|
| 444 |
|
|
dictId = c_stream.adler;
|
| 445 |
|
|
c_stream.next_out = compr;
|
| 446 |
|
|
c_stream.avail_out = (uInt)comprLen;
|
| 447 |
|
|
|
| 448 |
|
|
c_stream.next_in = (Bytef*)hello;
|
| 449 |
|
|
c_stream.avail_in = (uInt)strlen(hello)+1;
|
| 450 |
|
|
|
| 451 |
|
|
err = deflate(&c_stream, Z_FINISH);
|
| 452 |
|
|
if (err != Z_STREAM_END) {
|
| 453 |
|
|
fprintf(stderr, "deflate should report Z_STREAM_END\n");
|
| 454 |
|
|
exit(1);
|
| 455 |
|
|
}
|
| 456 |
|
|
err = deflateEnd(&c_stream);
|
| 457 |
|
|
CHECK_ERR(err, "deflateEnd");
|
| 458 |
|
|
}
|
| 459 |
|
|
|
| 460 |
|
|
/* ===========================================================================
|
| 461 |
|
|
* Test inflate() with a preset dictionary
|
| 462 |
|
|
*/
|
| 463 |
|
|
void test_dict_inflate(compr, comprLen, uncompr, uncomprLen)
|
| 464 |
|
|
Byte *compr, *uncompr;
|
| 465 |
|
|
uLong comprLen, uncomprLen;
|
| 466 |
|
|
{
|
| 467 |
|
|
int err;
|
| 468 |
|
|
z_stream d_stream; /* decompression stream */
|
| 469 |
|
|
|
| 470 |
|
|
strcpy((char*)uncompr, "garbage");
|
| 471 |
|
|
|
| 472 |
|
|
d_stream.zalloc = (alloc_func)0;
|
| 473 |
|
|
d_stream.zfree = (free_func)0;
|
| 474 |
|
|
d_stream.opaque = (voidpf)0;
|
| 475 |
|
|
|
| 476 |
|
|
d_stream.next_in = compr;
|
| 477 |
|
|
d_stream.avail_in = (uInt)comprLen;
|
| 478 |
|
|
|
| 479 |
|
|
err = inflateInit(&d_stream);
|
| 480 |
|
|
CHECK_ERR(err, "inflateInit");
|
| 481 |
|
|
|
| 482 |
|
|
d_stream.next_out = uncompr;
|
| 483 |
|
|
d_stream.avail_out = (uInt)uncomprLen;
|
| 484 |
|
|
|
| 485 |
|
|
for (;;) {
|
| 486 |
|
|
err = inflate(&d_stream, Z_NO_FLUSH);
|
| 487 |
|
|
if (err == Z_STREAM_END) break;
|
| 488 |
|
|
if (err == Z_NEED_DICT) {
|
| 489 |
|
|
if (d_stream.adler != dictId) {
|
| 490 |
|
|
fprintf(stderr, "unexpected dictionary");
|
| 491 |
|
|
exit(1);
|
| 492 |
|
|
}
|
| 493 |
|
|
err = inflateSetDictionary(&d_stream, (const Bytef*)dictionary,
|
| 494 |
|
|
sizeof(dictionary));
|
| 495 |
|
|
}
|
| 496 |
|
|
CHECK_ERR(err, "inflate with dict");
|
| 497 |
|
|
}
|
| 498 |
|
|
|
| 499 |
|
|
err = inflateEnd(&d_stream);
|
| 500 |
|
|
CHECK_ERR(err, "inflateEnd");
|
| 501 |
|
|
|
| 502 |
|
|
if (strcmp((char*)uncompr, hello)) {
|
| 503 |
|
|
fprintf(stderr, "bad inflate with dict\n");
|
| 504 |
|
|
exit(1);
|
| 505 |
|
|
} else {
|
| 506 |
|
|
printf("inflate with dictionary: %s\n", (char *)uncompr);
|
| 507 |
|
|
}
|
| 508 |
|
|
}
|
| 509 |
|
|
|
| 510 |
|
|
/* ===========================================================================
|
| 511 |
|
|
* Usage: example [output.gz [input.gz]]
|
| 512 |
|
|
*/
|
| 513 |
|
|
|
| 514 |
|
|
int main(argc, argv)
|
| 515 |
|
|
int argc;
|
| 516 |
|
|
char *argv[];
|
| 517 |
|
|
{
|
| 518 |
|
|
Byte *compr, *uncompr;
|
| 519 |
|
|
uLong comprLen = 10000*sizeof(int); /* don't overflow on MSDOS */
|
| 520 |
|
|
uLong uncomprLen = comprLen;
|
| 521 |
|
|
static const char* myVersion = ZLIB_VERSION;
|
| 522 |
|
|
|
| 523 |
|
|
if (zlibVersion()[0] != myVersion[0]) {
|
| 524 |
|
|
fprintf(stderr, "incompatible zlib version\n");
|
| 525 |
|
|
exit(1);
|
| 526 |
|
|
|
| 527 |
|
|
} else if (strcmp(zlibVersion(), ZLIB_VERSION) != 0) {
|
| 528 |
|
|
fprintf(stderr, "warning: different zlib version\n");
|
| 529 |
|
|
}
|
| 530 |
|
|
|
| 531 |
|
|
printf("zlib version %s = 0x%04x, compile flags = 0x%lx\n",
|
| 532 |
|
|
ZLIB_VERSION, ZLIB_VERNUM, zlibCompileFlags());
|
| 533 |
|
|
|
| 534 |
|
|
compr = (Byte*)calloc((uInt)comprLen, 1);
|
| 535 |
|
|
uncompr = (Byte*)calloc((uInt)uncomprLen, 1);
|
| 536 |
|
|
/* compr and uncompr are cleared to avoid reading uninitialized
|
| 537 |
|
|
* data and to ensure that uncompr compresses well.
|
| 538 |
|
|
*/
|
| 539 |
|
|
if (compr == Z_NULL || uncompr == Z_NULL) {
|
| 540 |
|
|
printf("out of memory\n");
|
| 541 |
|
|
exit(1);
|
| 542 |
|
|
}
|
| 543 |
|
|
test_compress(compr, comprLen, uncompr, uncomprLen);
|
| 544 |
|
|
|
| 545 |
|
|
test_gzio((argc > 1 ? argv[1] : TESTFILE),
|
| 546 |
|
|
uncompr, uncomprLen);
|
| 547 |
|
|
|
| 548 |
|
|
test_deflate(compr, comprLen);
|
| 549 |
|
|
test_inflate(compr, comprLen, uncompr, uncomprLen);
|
| 550 |
|
|
|
| 551 |
|
|
test_large_deflate(compr, comprLen, uncompr, uncomprLen);
|
| 552 |
|
|
test_large_inflate(compr, comprLen, uncompr, uncomprLen);
|
| 553 |
|
|
|
| 554 |
|
|
test_flush(compr, &comprLen);
|
| 555 |
|
|
test_sync(compr, comprLen, uncompr, uncomprLen);
|
| 556 |
|
|
comprLen = uncomprLen;
|
| 557 |
|
|
|
| 558 |
|
|
test_dict_deflate(compr, comprLen);
|
| 559 |
|
|
test_dict_inflate(compr, comprLen, uncompr, uncomprLen);
|
| 560 |
|
|
|
| 561 |
|
|
free(compr);
|
| 562 |
|
|
free(uncompr);
|
| 563 |
|
|
|
| 564 |
|
|
return 0;
|
| 565 |
|
|
}
|
