| Geant4 Cross Reference |
1 /* zutil.c -- target dependent utility functio 1 /* zutil.c -- target dependent utility functions for the compression library
2 * Copyright (C) 1995-2017 Jean-loup Gailly 2 * Copyright (C) 1995-2017 Jean-loup Gailly
3 * For conditions of distribution and use, see 3 * For conditions of distribution and use, see copyright notice in zlib.h
4 */ 4 */
5 5
6 /* @(#) $Id$ */ 6 /* @(#) $Id$ */
7 7
8 #include "zutil.h" 8 #include "zutil.h"
9 #ifndef Z_SOLO 9 #ifndef Z_SOLO
10 # include "gzguts.h" 10 # include "gzguts.h"
11 #endif 11 #endif
12 12
13 z_const char * const z_errmsg[10] = { 13 z_const char * const z_errmsg[10] = {
14 (z_const char *)"need dictionary", /* 14 (z_const char *)"need dictionary", /* Z_NEED_DICT 2 */
15 (z_const char *)"stream end", /* 15 (z_const char *)"stream end", /* Z_STREAM_END 1 */
16 (z_const char *)"", /* 16 (z_const char *)"", /* Z_OK 0 */
17 (z_const char *)"file error", /* 17 (z_const char *)"file error", /* Z_ERRNO (-1) */
18 (z_const char *)"stream error", /* 18 (z_const char *)"stream error", /* Z_STREAM_ERROR (-2) */
19 (z_const char *)"data error", /* 19 (z_const char *)"data error", /* Z_DATA_ERROR (-3) */
20 (z_const char *)"insufficient memory", /* 20 (z_const char *)"insufficient memory", /* Z_MEM_ERROR (-4) */
21 (z_const char *)"buffer error", /* 21 (z_const char *)"buffer error", /* Z_BUF_ERROR (-5) */
22 (z_const char *)"incompatible version",/* 22 (z_const char *)"incompatible version",/* Z_VERSION_ERROR (-6) */
23 (z_const char *)"" 23 (z_const char *)""
24 }; 24 };
25 25
26 26
27 const char * ZEXPORT zlibVersion() 27 const char * ZEXPORT zlibVersion()
28 { 28 {
29 return ZLIB_VERSION; 29 return ZLIB_VERSION;
30 } 30 }
31 31
32 uLong ZEXPORT zlibCompileFlags() 32 uLong ZEXPORT zlibCompileFlags()
33 { 33 {
34 uLong flags; 34 uLong flags;
35 35
36 flags = 0; 36 flags = 0;
37 switch ((int)(sizeof(uInt))) { 37 switch ((int)(sizeof(uInt))) {
38 case 2: break; 38 case 2: break;
39 case 4: flags += 1; break; 39 case 4: flags += 1; break;
40 case 8: flags += 2; break; 40 case 8: flags += 2; break;
41 default: flags += 3; 41 default: flags += 3;
42 } 42 }
43 switch ((int)(sizeof(uLong))) { 43 switch ((int)(sizeof(uLong))) {
44 case 2: break; 44 case 2: break;
45 case 4: flags += 1 << 2; break; 45 case 4: flags += 1 << 2; break;
46 case 8: flags += 2 << 2; break; 46 case 8: flags += 2 << 2; break;
47 default: flags += 3 << 2; 47 default: flags += 3 << 2;
48 } 48 }
49 switch ((int)(sizeof(voidpf))) { 49 switch ((int)(sizeof(voidpf))) {
50 case 2: break; 50 case 2: break;
51 case 4: flags += 1 << 4; break; 51 case 4: flags += 1 << 4; break;
52 case 8: flags += 2 << 4; break; 52 case 8: flags += 2 << 4; break;
53 default: flags += 3 << 4; 53 default: flags += 3 << 4;
54 } 54 }
55 switch ((int)(sizeof(z_off_t))) { 55 switch ((int)(sizeof(z_off_t))) {
56 case 2: break; 56 case 2: break;
57 case 4: flags += 1 << 6; break; 57 case 4: flags += 1 << 6; break;
58 case 8: flags += 2 << 6; break; 58 case 8: flags += 2 << 6; break;
59 default: flags += 3 << 6; 59 default: flags += 3 << 6;
60 } 60 }
61 #ifdef ZLIB_DEBUG 61 #ifdef ZLIB_DEBUG
62 flags += 1 << 8; 62 flags += 1 << 8;
63 #endif 63 #endif
64 /* 64 /*
65 #if defined(ASMV) || defined(ASMINF) 65 #if defined(ASMV) || defined(ASMINF)
66 flags += 1 << 9; 66 flags += 1 << 9;
67 #endif 67 #endif
68 */ 68 */
69 #ifdef ZLIB_WINAPI 69 #ifdef ZLIB_WINAPI
70 flags += 1 << 10; 70 flags += 1 << 10;
71 #endif 71 #endif
72 #ifdef BUILDFIXED 72 #ifdef BUILDFIXED
73 flags += 1 << 12; 73 flags += 1 << 12;
74 #endif 74 #endif
75 #ifdef DYNAMIC_CRC_TABLE 75 #ifdef DYNAMIC_CRC_TABLE
76 flags += 1 << 13; 76 flags += 1 << 13;
77 #endif 77 #endif
78 #ifdef NO_GZCOMPRESS 78 #ifdef NO_GZCOMPRESS
79 flags += 1L << 16; 79 flags += 1L << 16;
80 #endif 80 #endif
81 #ifdef NO_GZIP 81 #ifdef NO_GZIP
82 flags += 1L << 17; 82 flags += 1L << 17;
83 #endif 83 #endif
84 #ifdef PKZIP_BUG_WORKAROUND 84 #ifdef PKZIP_BUG_WORKAROUND
85 flags += 1L << 20; 85 flags += 1L << 20;
86 #endif 86 #endif
87 #ifdef FASTEST 87 #ifdef FASTEST
88 flags += 1L << 21; 88 flags += 1L << 21;
89 #endif 89 #endif
90 #if defined(STDC) || defined(Z_HAVE_STDARG_H) 90 #if defined(STDC) || defined(Z_HAVE_STDARG_H)
91 # ifdef NO_vsnprintf 91 # ifdef NO_vsnprintf
92 flags += 1L << 25; 92 flags += 1L << 25;
93 # ifdef HAS_vsprintf_void 93 # ifdef HAS_vsprintf_void
94 flags += 1L << 26; 94 flags += 1L << 26;
95 # endif 95 # endif
96 # else 96 # else
97 # ifdef HAS_vsnprintf_void 97 # ifdef HAS_vsnprintf_void
98 flags += 1L << 26; 98 flags += 1L << 26;
99 # endif 99 # endif
100 # endif 100 # endif
101 #else 101 #else
102 flags += 1L << 24; 102 flags += 1L << 24;
103 # ifdef NO_snprintf 103 # ifdef NO_snprintf
104 flags += 1L << 25; 104 flags += 1L << 25;
105 # ifdef HAS_sprintf_void 105 # ifdef HAS_sprintf_void
106 flags += 1L << 26; 106 flags += 1L << 26;
107 # endif 107 # endif
108 # else 108 # else
109 # ifdef HAS_snprintf_void 109 # ifdef HAS_snprintf_void
110 flags += 1L << 26; 110 flags += 1L << 26;
111 # endif 111 # endif
112 # endif 112 # endif
113 #endif 113 #endif
114 return flags; 114 return flags;
115 } 115 }
116 116
117 #ifdef ZLIB_DEBUG 117 #ifdef ZLIB_DEBUG
118 #include <stdlib.h> 118 #include <stdlib.h>
119 # ifndef verbose 119 # ifndef verbose
120 # define verbose 0 120 # define verbose 0
121 # endif 121 # endif
122 int ZLIB_INTERNAL z_verbose = verbose; 122 int ZLIB_INTERNAL z_verbose = verbose;
123 123
124 void ZLIB_INTERNAL z_error(m) 124 void ZLIB_INTERNAL z_error(m)
125 char *m; 125 char *m;
126 { 126 {
127 fprintf(stderr, "%s\n", m); 127 fprintf(stderr, "%s\n", m);
128 exit(1); 128 exit(1);
129 } 129 }
130 #endif 130 #endif
131 131
132 /* exported to allow conversion of error code 132 /* exported to allow conversion of error code to string for compress() and
133 * uncompress() 133 * uncompress()
134 */ 134 */
135 const char * ZEXPORT zError(err) 135 const char * ZEXPORT zError(err)
136 int err; 136 int err;
137 { 137 {
138 return ERR_MSG(err); 138 return ERR_MSG(err);
139 } 139 }
140 140
141 #if defined(_WIN32_WCE) && _WIN32_WCE < 0x800 141 #if defined(_WIN32_WCE) && _WIN32_WCE < 0x800
142 /* The older Microsoft C Run-Time Library 142 /* The older Microsoft C Run-Time Library for Windows CE doesn't have
143 * errno. We define it as a global variab 143 * errno. We define it as a global variable to simplify porting.
144 * Its value is always 0 and should not be 144 * Its value is always 0 and should not be used.
145 */ 145 */
146 int errno = 0; 146 int errno = 0;
147 #endif 147 #endif
148 148
149 #ifndef HAVE_MEMCPY 149 #ifndef HAVE_MEMCPY
150 150
151 void ZLIB_INTERNAL zmemcpy(dest, source, len) 151 void ZLIB_INTERNAL zmemcpy(dest, source, len)
152 Bytef* dest; 152 Bytef* dest;
153 const Bytef* source; 153 const Bytef* source;
154 uInt len; 154 uInt len;
155 { 155 {
156 if (len == 0) return; 156 if (len == 0) return;
157 do { 157 do {
158 *dest++ = *source++; /* ??? to be unro 158 *dest++ = *source++; /* ??? to be unrolled */
159 } while (--len != 0); 159 } while (--len != 0);
160 } 160 }
161 161
162 int ZLIB_INTERNAL zmemcmp(s1, s2, len) 162 int ZLIB_INTERNAL zmemcmp(s1, s2, len)
163 const Bytef* s1; 163 const Bytef* s1;
164 const Bytef* s2; 164 const Bytef* s2;
165 uInt len; 165 uInt len;
166 { 166 {
167 uInt j; 167 uInt j;
168 168
169 for (j = 0; j < len; j++) { 169 for (j = 0; j < len; j++) {
170 if (s1[j] != s2[j]) return 2*(s1[j] > 170 if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
171 } 171 }
172 return 0; 172 return 0;
173 } 173 }
174 174
175 void ZLIB_INTERNAL zmemzero(dest, len) 175 void ZLIB_INTERNAL zmemzero(dest, len)
176 Bytef* dest; 176 Bytef* dest;
177 uInt len; 177 uInt len;
178 { 178 {
179 if (len == 0) return; 179 if (len == 0) return;
180 do { 180 do {
181 *dest++ = 0; /* ??? to be unrolled */ 181 *dest++ = 0; /* ??? to be unrolled */
182 } while (--len != 0); 182 } while (--len != 0);
183 } 183 }
184 #endif 184 #endif
185 185
186 #ifndef Z_SOLO 186 #ifndef Z_SOLO
187 187
188 #ifdef SYS16BIT 188 #ifdef SYS16BIT
189 189
190 #ifdef __TURBOC__ 190 #ifdef __TURBOC__
191 /* Turbo C in 16-bit mode */ 191 /* Turbo C in 16-bit mode */
192 192
193 # define MY_ZCALLOC 193 # define MY_ZCALLOC
194 194
195 /* Turbo C malloc() does not allow dynamic all 195 /* Turbo C malloc() does not allow dynamic allocation of 64K bytes
196 * and farmalloc(64K) returns a pointer with a 196 * and farmalloc(64K) returns a pointer with an offset of 8, so we
197 * must fix the pointer. Warning: the pointer 197 * must fix the pointer. Warning: the pointer must be put back to its
198 * original form in order to free it, use zcfr 198 * original form in order to free it, use zcfree().
199 */ 199 */
200 200
201 #define MAX_PTR 10 201 #define MAX_PTR 10
202 /* 10*64K = 640K */ 202 /* 10*64K = 640K */
203 203
204 local int next_ptr = 0; 204 local int next_ptr = 0;
205 205
206 typedef struct ptr_table_s { 206 typedef struct ptr_table_s {
207 voidpf org_ptr; 207 voidpf org_ptr;
208 voidpf new_ptr; 208 voidpf new_ptr;
209 } ptr_table; 209 } ptr_table;
210 210
211 local ptr_table table[MAX_PTR]; 211 local ptr_table table[MAX_PTR];
212 /* This table is used to remember the original 212 /* This table is used to remember the original form of pointers
213 * to large buffers (64K). Such pointers are n 213 * to large buffers (64K). Such pointers are normalized with a zero offset.
214 * Since MSDOS is not a preemptive multitaskin 214 * Since MSDOS is not a preemptive multitasking OS, this table is not
215 * protected from concurrent access. This hack 215 * protected from concurrent access. This hack doesn't work anyway on
216 * a protected system like OS/2. Use Microsoft 216 * a protected system like OS/2. Use Microsoft C instead.
217 */ 217 */
218 218
219 voidpf ZLIB_INTERNAL zcalloc(voidpf opaque, un 219 voidpf ZLIB_INTERNAL zcalloc(voidpf opaque, unsigned items, unsigned size)
220 { 220 {
221 voidpf buf; 221 voidpf buf;
222 ulg bsize = (ulg)items*size; 222 ulg bsize = (ulg)items*size;
223 223
224 (void)opaque; 224 (void)opaque;
225 225
226 /* If we allocate less than 65520 bytes, w 226 /* If we allocate less than 65520 bytes, we assume that farmalloc
227 * will return a usable pointer which does 227 * will return a usable pointer which doesn't have to be normalized.
228 */ 228 */
229 if (bsize < 65520L) { 229 if (bsize < 65520L) {
230 buf = farmalloc(bsize); 230 buf = farmalloc(bsize);
231 if (*(ush*)&buf != 0) return buf; 231 if (*(ush*)&buf != 0) return buf;
232 } else { 232 } else {
233 buf = farmalloc(bsize + 16L); 233 buf = farmalloc(bsize + 16L);
234 } 234 }
235 if (buf == NULL || next_ptr >= MAX_PTR) re 235 if (buf == NULL || next_ptr >= MAX_PTR) return NULL;
236 table[next_ptr].org_ptr = buf; 236 table[next_ptr].org_ptr = buf;
237 237
238 /* Normalize the pointer to seg:0 */ 238 /* Normalize the pointer to seg:0 */
239 *((ush*)&buf+1) += ((ush)((uch*)buf-0) + 1 239 *((ush*)&buf+1) += ((ush)((uch*)buf-0) + 15) >> 4;
240 *(ush*)&buf = 0; 240 *(ush*)&buf = 0;
241 table[next_ptr++].new_ptr = buf; 241 table[next_ptr++].new_ptr = buf;
242 return buf; 242 return buf;
243 } 243 }
244 244
245 void ZLIB_INTERNAL zcfree(voidpf opaque, voidp 245 void ZLIB_INTERNAL zcfree(voidpf opaque, voidpf ptr)
246 { 246 {
247 int n; 247 int n;
248 248
249 (void)opaque; 249 (void)opaque;
250 250
251 if (*(ush*)&ptr != 0) { /* object < 64K */ 251 if (*(ush*)&ptr != 0) { /* object < 64K */
252 farfree(ptr); 252 farfree(ptr);
253 return; 253 return;
254 } 254 }
255 /* Find the original pointer */ 255 /* Find the original pointer */
256 for (n = 0; n < next_ptr; n++) { 256 for (n = 0; n < next_ptr; n++) {
257 if (ptr != table[n].new_ptr) continue; 257 if (ptr != table[n].new_ptr) continue;
258 258
259 farfree(table[n].org_ptr); 259 farfree(table[n].org_ptr);
260 while (++n < next_ptr) { 260 while (++n < next_ptr) {
261 table[n-1] = table[n]; 261 table[n-1] = table[n];
262 } 262 }
263 next_ptr--; 263 next_ptr--;
264 return; 264 return;
265 } 265 }
266 Assert(0, "zcfree: ptr not found"); 266 Assert(0, "zcfree: ptr not found");
267 } 267 }
268 268
269 #endif /* __TURBOC__ */ 269 #endif /* __TURBOC__ */
270 270
271 271
272 #ifdef M_I86 272 #ifdef M_I86
273 /* Microsoft C in 16-bit mode */ 273 /* Microsoft C in 16-bit mode */
274 274
275 # define MY_ZCALLOC 275 # define MY_ZCALLOC
276 276
277 #if (!defined(_MSC_VER) || (_MSC_VER <= 600)) 277 #if (!defined(_MSC_VER) || (_MSC_VER <= 600))
278 # define _halloc halloc 278 # define _halloc halloc
279 # define _hfree hfree 279 # define _hfree hfree
280 #endif 280 #endif
281 281
282 voidpf ZLIB_INTERNAL zcalloc(voidpf opaque, uI 282 voidpf ZLIB_INTERNAL zcalloc(voidpf opaque, uInt items, uInt size)
283 { 283 {
284 (void)opaque; 284 (void)opaque;
285 return _halloc((long)items, size); 285 return _halloc((long)items, size);
286 } 286 }
287 287
288 void ZLIB_INTERNAL zcfree(voidpf opaque, voidp 288 void ZLIB_INTERNAL zcfree(voidpf opaque, voidpf ptr)
289 { 289 {
290 (void)opaque; 290 (void)opaque;
291 _hfree(ptr); 291 _hfree(ptr);
292 } 292 }
293 293
294 #endif /* M_I86 */ 294 #endif /* M_I86 */
295 295
296 #endif /* SYS16BIT */ 296 #endif /* SYS16BIT */
297 297
298 298
299 #ifndef MY_ZCALLOC /* Any system without a spe 299 #ifndef MY_ZCALLOC /* Any system without a special alloc function */
300 300
301 #ifndef STDC 301 #ifndef STDC
302 extern voidp malloc OF((uInt size)); 302 extern voidp malloc OF((uInt size));
303 extern voidp calloc OF((uInt items, uInt size 303 extern voidp calloc OF((uInt items, uInt size));
304 extern void free OF((voidpf ptr)); 304 extern void free OF((voidpf ptr));
305 #endif 305 #endif
306 306
307 voidpf ZLIB_INTERNAL zcalloc(opaque, items, si 307 voidpf ZLIB_INTERNAL zcalloc(opaque, items, size)
308 voidpf opaque; 308 voidpf opaque;
309 unsigned items; 309 unsigned items;
310 unsigned size; 310 unsigned size;
311 { 311 {
312 (void)opaque; 312 (void)opaque;
313 return sizeof(uInt) > 2 ? (voidpf)malloc(i 313 return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
314 (voidpf)calloc(i 314 (voidpf)calloc(items, size);
315 } 315 }
316 316
317 void ZLIB_INTERNAL zcfree(opaque, ptr) 317 void ZLIB_INTERNAL zcfree(opaque, ptr)
318 voidpf opaque; 318 voidpf opaque;
319 voidpf ptr; 319 voidpf ptr;
320 { 320 {
321 (void)opaque; 321 (void)opaque;
322 free(ptr); 322 free(ptr);
323 } 323 }
324 324
325 #endif /* MY_ZCALLOC */ 325 #endif /* MY_ZCALLOC */
326 326
327 #endif /* !Z_SOLO */ 327 #endif /* !Z_SOLO */
328 328