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| Source at commit 655 created 13 years 4 months ago. By meklort, Modules update. removed hardcoding for dyld_stub_bunder in modules.c Added a subset of klibc for a more complete c library implimentation. Added a subset of uclibc++ for an initial c++ implimentation. Note: cout / cin / file io has been disabled. Also note that exceptions and rtti is disabled. Modified the helow world code foa small c++ test. | |
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| 1 | /* zutil.c -- target dependent utility functions for the compression library␊ |
| 2 | * Copyright (C) 1995-2005, 2010 Jean-loup Gailly.␊ |
| 3 | * For conditions of distribution and use, see copyright notice in zlib.h␊ |
| 4 | */␊ |
| 5 | ␊ |
| 6 | /* @(#) $Id$ */␊ |
| 7 | ␊ |
| 8 | #include "zutil.h"␊ |
| 9 | ␊ |
| 10 | extern void *calloc(size_t nmemb, size_t size);␊ |
| 11 | ␊ |
| 12 | #ifndef NO_DUMMY_DECL␊ |
| 13 | struct internal_state {int dummy;}; /* for buggy compilers */␊ |
| 14 | #endif␊ |
| 15 | ␊ |
| 16 | const char * const z_errmsg[10] = {␊ |
| 17 | "need dictionary", /* Z_NEED_DICT 2 */␊ |
| 18 | "stream end", /* Z_STREAM_END 1 */␊ |
| 19 | "", /* Z_OK 0 */␊ |
| 20 | "file error", /* Z_ERRNO (-1) */␊ |
| 21 | "stream error", /* Z_STREAM_ERROR (-2) */␊ |
| 22 | "data error", /* Z_DATA_ERROR (-3) */␊ |
| 23 | "insufficient memory", /* Z_MEM_ERROR (-4) */␊ |
| 24 | "buffer error", /* Z_BUF_ERROR (-5) */␊ |
| 25 | "incompatible version",/* Z_VERSION_ERROR (-6) */␊ |
| 26 | ""};␊ |
| 27 | ␊ |
| 28 | ␊ |
| 29 | const char * ZEXPORT zlibVersion()␊ |
| 30 | {␊ |
| 31 | return ZLIB_VERSION;␊ |
| 32 | }␊ |
| 33 | ␊ |
| 34 | uLong ZEXPORT zlibCompileFlags()␊ |
| 35 | {␊ |
| 36 | uLong flags;␊ |
| 37 | ␊ |
| 38 | flags = 0;␊ |
| 39 | switch ((int)(sizeof(uInt))) {␊ |
| 40 | case 2: break;␊ |
| 41 | case 4: flags += 1; break;␊ |
| 42 | case 8: flags += 2; break;␊ |
| 43 | default: flags += 3;␊ |
| 44 | }␊ |
| 45 | switch ((int)(sizeof(uLong))) {␊ |
| 46 | case 2: break;␊ |
| 47 | case 4: flags += 1 << 2; break;␊ |
| 48 | case 8: flags += 2 << 2; break;␊ |
| 49 | default: flags += 3 << 2;␊ |
| 50 | }␊ |
| 51 | switch ((int)(sizeof(voidpf))) {␊ |
| 52 | case 2: break;␊ |
| 53 | case 4: flags += 1 << 4; break;␊ |
| 54 | case 8: flags += 2 << 4; break;␊ |
| 55 | default: flags += 3 << 4;␊ |
| 56 | }␊ |
| 57 | switch ((int)(sizeof(z_off_t))) {␊ |
| 58 | case 2: break;␊ |
| 59 | case 4: flags += 1 << 6; break;␊ |
| 60 | case 8: flags += 2 << 6; break;␊ |
| 61 | default: flags += 3 << 6;␊ |
| 62 | }␊ |
| 63 | #ifdef DEBUG␊ |
| 64 | flags += 1 << 8;␊ |
| 65 | #endif␊ |
| 66 | #if defined(ASMV) || defined(ASMINF)␊ |
| 67 | flags += 1 << 9;␊ |
| 68 | #endif␊ |
| 69 | #ifdef ZLIB_WINAPI␊ |
| 70 | flags += 1 << 10;␊ |
| 71 | #endif␊ |
| 72 | #ifdef BUILDFIXED␊ |
| 73 | flags += 1 << 12;␊ |
| 74 | #endif␊ |
| 75 | #ifdef DYNAMIC_CRC_TABLE␊ |
| 76 | flags += 1 << 13;␊ |
| 77 | #endif␊ |
| 78 | #ifdef NO_GZCOMPRESS␊ |
| 79 | flags += 1L << 16;␊ |
| 80 | #endif␊ |
| 81 | #ifdef NO_GZIP␊ |
| 82 | flags += 1L << 17;␊ |
| 83 | #endif␊ |
| 84 | #ifdef PKZIP_BUG_WORKAROUND␊ |
| 85 | flags += 1L << 20;␊ |
| 86 | #endif␊ |
| 87 | #ifdef FASTEST␊ |
| 88 | flags += 1L << 21;␊ |
| 89 | #endif␊ |
| 90 | #ifdef STDC␊ |
| 91 | # ifdef NO_vsnprintf␊ |
| 92 | flags += 1L << 25;␊ |
| 93 | # ifdef HAS_vsprintf_void␊ |
| 94 | flags += 1L << 26;␊ |
| 95 | # endif␊ |
| 96 | # else␊ |
| 97 | # ifdef HAS_vsnprintf_void␊ |
| 98 | flags += 1L << 26;␊ |
| 99 | # endif␊ |
| 100 | # endif␊ |
| 101 | #else␊ |
| 102 | flags += 1L << 24;␊ |
| 103 | # ifdef NO_snprintf␊ |
| 104 | flags += 1L << 25;␊ |
| 105 | # ifdef HAS_sprintf_void␊ |
| 106 | flags += 1L << 26;␊ |
| 107 | # endif␊ |
| 108 | # else␊ |
| 109 | # ifdef HAS_snprintf_void␊ |
| 110 | flags += 1L << 26;␊ |
| 111 | # endif␊ |
| 112 | # endif␊ |
| 113 | #endif␊ |
| 114 | return flags;␊ |
| 115 | }␊ |
| 116 | ␊ |
| 117 | #ifdef DEBUG␊ |
| 118 | ␊ |
| 119 | # ifndef verbose␊ |
| 120 | # define verbose 0␊ |
| 121 | # endif␊ |
| 122 | int ZLIB_INTERNAL z_verbose = verbose;␊ |
| 123 | ␊ |
| 124 | void ZLIB_INTERNAL z_error (m)␊ |
| 125 | char *m;␊ |
| 126 | {␊ |
| 127 | fprintf(stderr, "%s\n", m);␊ |
| 128 | exit(1);␊ |
| 129 | }␊ |
| 130 | #endif␊ |
| 131 | ␊ |
| 132 | /* exported to allow conversion of error code to string for compress() and␊ |
| 133 | * uncompress()␊ |
| 134 | */␊ |
| 135 | const char * ZEXPORT zError(err)␊ |
| 136 | int err;␊ |
| 137 | {␊ |
| 138 | return ERR_MSG(err);␊ |
| 139 | }␊ |
| 140 | ␊ |
| 141 | #if defined(_WIN32_WCE)␊ |
| 142 | /* The Microsoft C Run-Time Library for Windows CE doesn't have␊ |
| 143 | * errno. We define it as a global variable to simplify porting.␊ |
| 144 | * Its value is always 0 and should not be used.␊ |
| 145 | */␊ |
| 146 | int errno = 0;␊ |
| 147 | #endif␊ |
| 148 | ␊ |
| 149 | #ifndef HAVE_MEMCPY␊ |
| 150 | ␊ |
| 151 | void ZLIB_INTERNAL zmemcpy(dest, source, len)␊ |
| 152 | Bytef* dest;␊ |
| 153 | const Bytef* source;␊ |
| 154 | uInt len;␊ |
| 155 | {␊ |
| 156 | if (len == 0) return;␊ |
| 157 | do {␊ |
| 158 | *dest++ = *source++; /* ??? to be unrolled */␊ |
| 159 | } while (--len != 0);␊ |
| 160 | }␊ |
| 161 | ␊ |
| 162 | int ZLIB_INTERNAL zmemcmp(s1, s2, len)␊ |
| 163 | const Bytef* s1;␊ |
| 164 | const Bytef* s2;␊ |
| 165 | uInt len;␊ |
| 166 | {␊ |
| 167 | uInt j;␊ |
| 168 | ␊ |
| 169 | for (j = 0; j < len; j++) {␊ |
| 170 | if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;␊ |
| 171 | }␊ |
| 172 | return 0;␊ |
| 173 | }␊ |
| 174 | ␊ |
| 175 | void ZLIB_INTERNAL zmemzero(dest, len)␊ |
| 176 | Bytef* dest;␊ |
| 177 | uInt len;␊ |
| 178 | {␊ |
| 179 | if (len == 0) return;␊ |
| 180 | do {␊ |
| 181 | *dest++ = 0; /* ??? to be unrolled */␊ |
| 182 | } while (--len != 0);␊ |
| 183 | }␊ |
| 184 | #endif␊ |
| 185 | ␊ |
| 186 | ␊ |
| 187 | #ifdef SYS16BIT␊ |
| 188 | ␊ |
| 189 | #ifdef __TURBOC__␊ |
| 190 | /* Turbo C in 16-bit mode */␊ |
| 191 | ␊ |
| 192 | # define MY_ZCALLOC␊ |
| 193 | ␊ |
| 194 | /* Turbo C malloc() does not allow dynamic allocation of 64K bytes␊ |
| 195 | * and farmalloc(64K) returns a pointer with an offset of 8, so we␊ |
| 196 | * must fix the pointer. Warning: the pointer must be put back to its␊ |
| 197 | * original form in order to free it, use zcfree().␊ |
| 198 | */␊ |
| 199 | ␊ |
| 200 | #define MAX_PTR 10␊ |
| 201 | /* 10*64K = 640K */␊ |
| 202 | ␊ |
| 203 | local int next_ptr = 0;␊ |
| 204 | ␊ |
| 205 | typedef struct ptr_table_s {␊ |
| 206 | voidpf org_ptr;␊ |
| 207 | voidpf new_ptr;␊ |
| 208 | } ptr_table;␊ |
| 209 | ␊ |
| 210 | local ptr_table table[MAX_PTR];␊ |
| 211 | /* This table is used to remember the original form of pointers␊ |
| 212 | * to large buffers (64K). Such pointers are normalized with a zero offset.␊ |
| 213 | * Since MSDOS is not a preemptive multitasking OS, this table is not␊ |
| 214 | * protected from concurrent access. This hack doesn't work anyway on␊ |
| 215 | * a protected system like OS/2. Use Microsoft C instead.␊ |
| 216 | */␊ |
| 217 | ␊ |
| 218 | voidpf ZLIB_INTERNAL zcalloc (voidpf opaque, unsigned items, unsigned size)␊ |
| 219 | {␊ |
| 220 | voidpf buf = opaque; /* just to make some compilers happy */␊ |
| 221 | ulg bsize = (ulg)items*size;␊ |
| 222 | ␊ |
| 223 | /* If we allocate less than 65520 bytes, we assume that farmalloc␊ |
| 224 | * will return a usable pointer which doesn't have to be normalized.␊ |
| 225 | */␊ |
| 226 | if (bsize < 65520L) {␊ |
| 227 | buf = farmalloc(bsize);␊ |
| 228 | if (*(ush*)&buf != 0) return buf;␊ |
| 229 | } else {␊ |
| 230 | buf = farmalloc(bsize + 16L);␊ |
| 231 | }␊ |
| 232 | if (buf == NULL || next_ptr >= MAX_PTR) return NULL;␊ |
| 233 | table[next_ptr].org_ptr = buf;␊ |
| 234 | ␊ |
| 235 | /* Normalize the pointer to seg:0 */␊ |
| 236 | *((ush*)&buf+1) += ((ush)((uch*)buf-0) + 15) >> 4;␊ |
| 237 | *(ush*)&buf = 0;␊ |
| 238 | table[next_ptr++].new_ptr = buf;␊ |
| 239 | return buf;␊ |
| 240 | }␊ |
| 241 | ␊ |
| 242 | void ZLIB_INTERNAL zcfree (voidpf opaque, voidpf ptr)␊ |
| 243 | {␊ |
| 244 | int n;␊ |
| 245 | if (*(ush*)&ptr != 0) { /* object < 64K */␊ |
| 246 | farfree(ptr);␊ |
| 247 | return;␊ |
| 248 | }␊ |
| 249 | /* Find the original pointer */␊ |
| 250 | for (n = 0; n < next_ptr; n++) {␊ |
| 251 | if (ptr != table[n].new_ptr) continue;␊ |
| 252 | ␊ |
| 253 | farfree(table[n].org_ptr);␊ |
| 254 | while (++n < next_ptr) {␊ |
| 255 | table[n-1] = table[n];␊ |
| 256 | }␊ |
| 257 | next_ptr--;␊ |
| 258 | return;␊ |
| 259 | }␊ |
| 260 | ptr = opaque; /* just to make some compilers happy */␊ |
| 261 | Assert(0, "zcfree: ptr not found");␊ |
| 262 | }␊ |
| 263 | ␊ |
| 264 | #endif /* __TURBOC__ */␊ |
| 265 | ␊ |
| 266 | ␊ |
| 267 | #ifdef M_I86␊ |
| 268 | /* Microsoft C in 16-bit mode */␊ |
| 269 | ␊ |
| 270 | # define MY_ZCALLOC␊ |
| 271 | ␊ |
| 272 | #if (!defined(_MSC_VER) || (_MSC_VER <= 600))␊ |
| 273 | # define _halloc halloc␊ |
| 274 | # define _hfree hfree␊ |
| 275 | #endif␊ |
| 276 | ␊ |
| 277 | voidpf ZLIB_INTERNAL zcalloc (voidpf opaque, uInt items, uInt size)␊ |
| 278 | {␊ |
| 279 | if (opaque) opaque = 0; /* to make compiler happy */␊ |
| 280 | return _halloc((long)items, size);␊ |
| 281 | }␊ |
| 282 | ␊ |
| 283 | void ZLIB_INTERNAL zcfree (voidpf opaque, voidpf ptr)␊ |
| 284 | {␊ |
| 285 | if (opaque) opaque = 0; /* to make compiler happy */␊ |
| 286 | _hfree(ptr);␊ |
| 287 | }␊ |
| 288 | ␊ |
| 289 | #endif /* M_I86 */␊ |
| 290 | ␊ |
| 291 | #endif /* SYS16BIT */␊ |
| 292 | ␊ |
| 293 | ␊ |
| 294 | #ifndef MY_ZCALLOC /* Any system without a special alloc function */␊ |
| 295 | ␊ |
| 296 | #ifndef STDC␊ |
| 297 | //extern voidp malloc OF((uInt size));␊ |
| 298 | //extern voidp calloc OF((uInt items, uInt size));␊ |
| 299 | //extern void free OF((voidpf ptr));␊ |
| 300 | #endif␊ |
| 301 | ␊ |
| 302 | voidpf ZLIB_INTERNAL zcalloc (opaque, items, size)␊ |
| 303 | voidpf opaque;␊ |
| 304 | unsigned items;␊ |
| 305 | unsigned size;␊ |
| 306 | {␊ |
| 307 | if (opaque) items += size - size; /* make compiler happy */␊ |
| 308 | return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :␊ |
| 309 | (voidpf)calloc(items, size);␊ |
| 310 | }␊ |
| 311 | ␊ |
| 312 | void ZLIB_INTERNAL zcfree (opaque, ptr)␊ |
| 313 | voidpf opaque;␊ |
| 314 | voidpf ptr;␊ |
| 315 | {␊ |
| 316 | free(ptr);␊ |
| 317 | if (opaque) return; /* make compiler happy */␊ |
| 318 | }␊ |
| 319 | ␊ |
| 320 | #endif /* MY_ZCALLOC */␊ |
| 321 | |
