| 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 | 
 } |