dbf-halloween2015

annotate libs/zlib/zutil.c @ 1:c3f5c32cb210

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barfed all the libraries in the source tree to make porting easier
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 01 Nov 2015 00:36:56 +0200
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nuclear@1 1 /* zutil.c -- target dependent utility functions for the compression library
nuclear@1 2 * Copyright (C) 1995-2005 Jean-loup Gailly.
nuclear@1 3 * For conditions of distribution and use, see copyright notice in zlib.h
nuclear@1 4 */
nuclear@1 5
nuclear@1 6 /* @(#) $Id$ */
nuclear@1 7
nuclear@1 8 #include "zutil.h"
nuclear@1 9
nuclear@1 10 #ifndef NO_DUMMY_DECL
nuclear@1 11 struct internal_state {int dummy;}; /* for buggy compilers */
nuclear@1 12 #endif
nuclear@1 13
nuclear@1 14 const char * const z_errmsg[10] = {
nuclear@1 15 "need dictionary", /* Z_NEED_DICT 2 */
nuclear@1 16 "stream end", /* Z_STREAM_END 1 */
nuclear@1 17 "", /* Z_OK 0 */
nuclear@1 18 "file error", /* Z_ERRNO (-1) */
nuclear@1 19 "stream error", /* Z_STREAM_ERROR (-2) */
nuclear@1 20 "data error", /* Z_DATA_ERROR (-3) */
nuclear@1 21 "insufficient memory", /* Z_MEM_ERROR (-4) */
nuclear@1 22 "buffer error", /* Z_BUF_ERROR (-5) */
nuclear@1 23 "incompatible version",/* Z_VERSION_ERROR (-6) */
nuclear@1 24 ""};
nuclear@1 25
nuclear@1 26
nuclear@1 27 const char * ZEXPORT zlibVersion()
nuclear@1 28 {
nuclear@1 29 return ZLIB_VERSION;
nuclear@1 30 }
nuclear@1 31
nuclear@1 32 uLong ZEXPORT zlibCompileFlags()
nuclear@1 33 {
nuclear@1 34 uLong flags;
nuclear@1 35
nuclear@1 36 flags = 0;
nuclear@1 37 switch (sizeof(uInt)) {
nuclear@1 38 case 2: break;
nuclear@1 39 case 4: flags += 1; break;
nuclear@1 40 case 8: flags += 2; break;
nuclear@1 41 default: flags += 3;
nuclear@1 42 }
nuclear@1 43 switch (sizeof(uLong)) {
nuclear@1 44 case 2: break;
nuclear@1 45 case 4: flags += 1 << 2; break;
nuclear@1 46 case 8: flags += 2 << 2; break;
nuclear@1 47 default: flags += 3 << 2;
nuclear@1 48 }
nuclear@1 49 switch (sizeof(voidpf)) {
nuclear@1 50 case 2: break;
nuclear@1 51 case 4: flags += 1 << 4; break;
nuclear@1 52 case 8: flags += 2 << 4; break;
nuclear@1 53 default: flags += 3 << 4;
nuclear@1 54 }
nuclear@1 55 switch (sizeof(z_off_t)) {
nuclear@1 56 case 2: break;
nuclear@1 57 case 4: flags += 1 << 6; break;
nuclear@1 58 case 8: flags += 2 << 6; break;
nuclear@1 59 default: flags += 3 << 6;
nuclear@1 60 }
nuclear@1 61 #ifdef DEBUG
nuclear@1 62 flags += 1 << 8;
nuclear@1 63 #endif
nuclear@1 64 #if defined(ASMV) || defined(ASMINF)
nuclear@1 65 flags += 1 << 9;
nuclear@1 66 #endif
nuclear@1 67 #ifdef ZLIB_WINAPI
nuclear@1 68 flags += 1 << 10;
nuclear@1 69 #endif
nuclear@1 70 #ifdef BUILDFIXED
nuclear@1 71 flags += 1 << 12;
nuclear@1 72 #endif
nuclear@1 73 #ifdef DYNAMIC_CRC_TABLE
nuclear@1 74 flags += 1 << 13;
nuclear@1 75 #endif
nuclear@1 76 #ifdef NO_GZCOMPRESS
nuclear@1 77 flags += 1L << 16;
nuclear@1 78 #endif
nuclear@1 79 #ifdef NO_GZIP
nuclear@1 80 flags += 1L << 17;
nuclear@1 81 #endif
nuclear@1 82 #ifdef PKZIP_BUG_WORKAROUND
nuclear@1 83 flags += 1L << 20;
nuclear@1 84 #endif
nuclear@1 85 #ifdef FASTEST
nuclear@1 86 flags += 1L << 21;
nuclear@1 87 #endif
nuclear@1 88 #ifdef STDC
nuclear@1 89 # ifdef NO_vsnprintf
nuclear@1 90 flags += 1L << 25;
nuclear@1 91 # ifdef HAS_vsprintf_void
nuclear@1 92 flags += 1L << 26;
nuclear@1 93 # endif
nuclear@1 94 # else
nuclear@1 95 # ifdef HAS_vsnprintf_void
nuclear@1 96 flags += 1L << 26;
nuclear@1 97 # endif
nuclear@1 98 # endif
nuclear@1 99 #else
nuclear@1 100 flags += 1L << 24;
nuclear@1 101 # ifdef NO_snprintf
nuclear@1 102 flags += 1L << 25;
nuclear@1 103 # ifdef HAS_sprintf_void
nuclear@1 104 flags += 1L << 26;
nuclear@1 105 # endif
nuclear@1 106 # else
nuclear@1 107 # ifdef HAS_snprintf_void
nuclear@1 108 flags += 1L << 26;
nuclear@1 109 # endif
nuclear@1 110 # endif
nuclear@1 111 #endif
nuclear@1 112 return flags;
nuclear@1 113 }
nuclear@1 114
nuclear@1 115 #ifdef DEBUG
nuclear@1 116
nuclear@1 117 # ifndef verbose
nuclear@1 118 # define verbose 0
nuclear@1 119 # endif
nuclear@1 120 int z_verbose = verbose;
nuclear@1 121
nuclear@1 122 void z_error (m)
nuclear@1 123 char *m;
nuclear@1 124 {
nuclear@1 125 fprintf(stderr, "%s\n", m);
nuclear@1 126 exit(1);
nuclear@1 127 }
nuclear@1 128 #endif
nuclear@1 129
nuclear@1 130 /* exported to allow conversion of error code to string for compress() and
nuclear@1 131 * uncompress()
nuclear@1 132 */
nuclear@1 133 const char * ZEXPORT zError(err)
nuclear@1 134 int err;
nuclear@1 135 {
nuclear@1 136 return ERR_MSG(err);
nuclear@1 137 }
nuclear@1 138
nuclear@1 139 #if defined(_WIN32_WCE)
nuclear@1 140 /* The Microsoft C Run-Time Library for Windows CE doesn't have
nuclear@1 141 * errno. We define it as a global variable to simplify porting.
nuclear@1 142 * Its value is always 0 and should not be used.
nuclear@1 143 */
nuclear@1 144 int errno = 0;
nuclear@1 145 #endif
nuclear@1 146
nuclear@1 147 #ifndef HAVE_MEMCPY
nuclear@1 148
nuclear@1 149 void zmemcpy(dest, source, len)
nuclear@1 150 Bytef* dest;
nuclear@1 151 const Bytef* source;
nuclear@1 152 uInt len;
nuclear@1 153 {
nuclear@1 154 if (len == 0) return;
nuclear@1 155 do {
nuclear@1 156 *dest++ = *source++; /* ??? to be unrolled */
nuclear@1 157 } while (--len != 0);
nuclear@1 158 }
nuclear@1 159
nuclear@1 160 int zmemcmp(s1, s2, len)
nuclear@1 161 const Bytef* s1;
nuclear@1 162 const Bytef* s2;
nuclear@1 163 uInt len;
nuclear@1 164 {
nuclear@1 165 uInt j;
nuclear@1 166
nuclear@1 167 for (j = 0; j < len; j++) {
nuclear@1 168 if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
nuclear@1 169 }
nuclear@1 170 return 0;
nuclear@1 171 }
nuclear@1 172
nuclear@1 173 void zmemzero(dest, len)
nuclear@1 174 Bytef* dest;
nuclear@1 175 uInt len;
nuclear@1 176 {
nuclear@1 177 if (len == 0) return;
nuclear@1 178 do {
nuclear@1 179 *dest++ = 0; /* ??? to be unrolled */
nuclear@1 180 } while (--len != 0);
nuclear@1 181 }
nuclear@1 182 #endif
nuclear@1 183
nuclear@1 184
nuclear@1 185 #ifdef SYS16BIT
nuclear@1 186
nuclear@1 187 #ifdef __TURBOC__
nuclear@1 188 /* Turbo C in 16-bit mode */
nuclear@1 189
nuclear@1 190 # define MY_ZCALLOC
nuclear@1 191
nuclear@1 192 /* Turbo C malloc() does not allow dynamic allocation of 64K bytes
nuclear@1 193 * and farmalloc(64K) returns a pointer with an offset of 8, so we
nuclear@1 194 * must fix the pointer. Warning: the pointer must be put back to its
nuclear@1 195 * original form in order to free it, use zcfree().
nuclear@1 196 */
nuclear@1 197
nuclear@1 198 #define MAX_PTR 10
nuclear@1 199 /* 10*64K = 640K */
nuclear@1 200
nuclear@1 201 local int next_ptr = 0;
nuclear@1 202
nuclear@1 203 typedef struct ptr_table_s {
nuclear@1 204 voidpf org_ptr;
nuclear@1 205 voidpf new_ptr;
nuclear@1 206 } ptr_table;
nuclear@1 207
nuclear@1 208 local ptr_table table[MAX_PTR];
nuclear@1 209 /* This table is used to remember the original form of pointers
nuclear@1 210 * to large buffers (64K). Such pointers are normalized with a zero offset.
nuclear@1 211 * Since MSDOS is not a preemptive multitasking OS, this table is not
nuclear@1 212 * protected from concurrent access. This hack doesn't work anyway on
nuclear@1 213 * a protected system like OS/2. Use Microsoft C instead.
nuclear@1 214 */
nuclear@1 215
nuclear@1 216 voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
nuclear@1 217 {
nuclear@1 218 voidpf buf = opaque; /* just to make some compilers happy */
nuclear@1 219 ulg bsize = (ulg)items*size;
nuclear@1 220
nuclear@1 221 /* If we allocate less than 65520 bytes, we assume that farmalloc
nuclear@1 222 * will return a usable pointer which doesn't have to be normalized.
nuclear@1 223 */
nuclear@1 224 if (bsize < 65520L) {
nuclear@1 225 buf = farmalloc(bsize);
nuclear@1 226 if (*(ush*)&buf != 0) return buf;
nuclear@1 227 } else {
nuclear@1 228 buf = farmalloc(bsize + 16L);
nuclear@1 229 }
nuclear@1 230 if (buf == NULL || next_ptr >= MAX_PTR) return NULL;
nuclear@1 231 table[next_ptr].org_ptr = buf;
nuclear@1 232
nuclear@1 233 /* Normalize the pointer to seg:0 */
nuclear@1 234 *((ush*)&buf+1) += ((ush)((uch*)buf-0) + 15) >> 4;
nuclear@1 235 *(ush*)&buf = 0;
nuclear@1 236 table[next_ptr++].new_ptr = buf;
nuclear@1 237 return buf;
nuclear@1 238 }
nuclear@1 239
nuclear@1 240 void zcfree (voidpf opaque, voidpf ptr)
nuclear@1 241 {
nuclear@1 242 int n;
nuclear@1 243 if (*(ush*)&ptr != 0) { /* object < 64K */
nuclear@1 244 farfree(ptr);
nuclear@1 245 return;
nuclear@1 246 }
nuclear@1 247 /* Find the original pointer */
nuclear@1 248 for (n = 0; n < next_ptr; n++) {
nuclear@1 249 if (ptr != table[n].new_ptr) continue;
nuclear@1 250
nuclear@1 251 farfree(table[n].org_ptr);
nuclear@1 252 while (++n < next_ptr) {
nuclear@1 253 table[n-1] = table[n];
nuclear@1 254 }
nuclear@1 255 next_ptr--;
nuclear@1 256 return;
nuclear@1 257 }
nuclear@1 258 ptr = opaque; /* just to make some compilers happy */
nuclear@1 259 Assert(0, "zcfree: ptr not found");
nuclear@1 260 }
nuclear@1 261
nuclear@1 262 #endif /* __TURBOC__ */
nuclear@1 263
nuclear@1 264
nuclear@1 265 #ifdef M_I86
nuclear@1 266 /* Microsoft C in 16-bit mode */
nuclear@1 267
nuclear@1 268 # define MY_ZCALLOC
nuclear@1 269
nuclear@1 270 #if (!defined(_MSC_VER) || (_MSC_VER <= 600))
nuclear@1 271 # define _halloc halloc
nuclear@1 272 # define _hfree hfree
nuclear@1 273 #endif
nuclear@1 274
nuclear@1 275 voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
nuclear@1 276 {
nuclear@1 277 if (opaque) opaque = 0; /* to make compiler happy */
nuclear@1 278 return _halloc((long)items, size);
nuclear@1 279 }
nuclear@1 280
nuclear@1 281 void zcfree (voidpf opaque, voidpf ptr)
nuclear@1 282 {
nuclear@1 283 if (opaque) opaque = 0; /* to make compiler happy */
nuclear@1 284 _hfree(ptr);
nuclear@1 285 }
nuclear@1 286
nuclear@1 287 #endif /* M_I86 */
nuclear@1 288
nuclear@1 289 #endif /* SYS16BIT */
nuclear@1 290
nuclear@1 291
nuclear@1 292 #ifndef MY_ZCALLOC /* Any system without a special alloc function */
nuclear@1 293
nuclear@1 294 #ifndef STDC
nuclear@1 295 extern voidp malloc OF((uInt size));
nuclear@1 296 extern voidp calloc OF((uInt items, uInt size));
nuclear@1 297 extern void free OF((voidpf ptr));
nuclear@1 298 #endif
nuclear@1 299
nuclear@1 300 voidpf zcalloc (opaque, items, size)
nuclear@1 301 voidpf opaque;
nuclear@1 302 unsigned items;
nuclear@1 303 unsigned size;
nuclear@1 304 {
nuclear@1 305 if (opaque) items += size - size; /* make compiler happy */
nuclear@1 306 return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
nuclear@1 307 (voidpf)calloc(items, size);
nuclear@1 308 }
nuclear@1 309
nuclear@1 310 void zcfree (opaque, ptr)
nuclear@1 311 voidpf opaque;
nuclear@1 312 voidpf ptr;
nuclear@1 313 {
nuclear@1 314 free(ptr);
nuclear@1 315 if (opaque) return; /* make compiler happy */
nuclear@1 316 }
nuclear@1 317
nuclear@1 318 #endif /* MY_ZCALLOC */