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