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7c673cae FG |
1 | /* gzlib.c contains minimal changes required to be compiled with zlibWrapper: |
2 | * - gz_statep was converted to union to work with -Wstrict-aliasing=1 */ | |
3 | ||
4 | /* gzlib.c -- zlib functions common to reading and writing gzip files | |
11fdf7f2 | 5 | * Copyright (C) 2004-2017 Mark Adler |
7c673cae FG |
6 | * For conditions of distribution and use, see http://www.zlib.net/zlib_license.html |
7 | */ | |
8 | ||
9 | #include "gzguts.h" | |
10 | ||
11fdf7f2 | 11 | #if defined(_WIN32) && !defined(__BORLANDC__) && !defined(__MINGW32__) |
7c673cae FG |
12 | # define LSEEK _lseeki64 |
13 | #else | |
14 | #if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0 | |
15 | # define LSEEK lseek64 | |
16 | #else | |
17 | # define LSEEK lseek | |
18 | #endif | |
19 | #endif | |
20 | ||
21 | /* Local functions */ | |
22 | local void gz_reset OF((gz_statep)); | |
23 | local gzFile gz_open OF((const void *, int, const char *)); | |
24 | ||
25 | #if defined UNDER_CE | |
26 | ||
27 | /* Map the Windows error number in ERROR to a locale-dependent error message | |
28 | string and return a pointer to it. Typically, the values for ERROR come | |
29 | from GetLastError. | |
30 | ||
31 | The string pointed to shall not be modified by the application, but may be | |
32 | overwritten by a subsequent call to gz_strwinerror | |
33 | ||
34 | The gz_strwinerror function does not change the current setting of | |
35 | GetLastError. */ | |
36 | char ZLIB_INTERNAL *gz_strwinerror (error) | |
37 | DWORD error; | |
38 | { | |
39 | static char buf[1024]; | |
40 | ||
41 | wchar_t *msgbuf; | |
42 | DWORD lasterr = GetLastError(); | |
43 | DWORD chars = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | |
44 | | FORMAT_MESSAGE_ALLOCATE_BUFFER, | |
45 | NULL, | |
46 | error, | |
47 | 0, /* Default language */ | |
48 | (LPVOID)&msgbuf, | |
49 | 0, | |
50 | NULL); | |
51 | if (chars != 0) { | |
52 | /* If there is an \r\n appended, zap it. */ | |
53 | if (chars >= 2 | |
54 | && msgbuf[chars - 2] == '\r' && msgbuf[chars - 1] == '\n') { | |
55 | chars -= 2; | |
56 | msgbuf[chars] = 0; | |
57 | } | |
58 | ||
59 | if (chars > sizeof (buf) - 1) { | |
60 | chars = sizeof (buf) - 1; | |
61 | msgbuf[chars] = 0; | |
62 | } | |
63 | ||
64 | wcstombs(buf, msgbuf, chars + 1); | |
65 | LocalFree(msgbuf); | |
66 | } | |
67 | else { | |
68 | sprintf(buf, "unknown win32 error (%ld)", error); | |
69 | } | |
70 | ||
71 | SetLastError(lasterr); | |
72 | return buf; | |
73 | } | |
74 | ||
75 | #endif /* UNDER_CE */ | |
76 | ||
77 | /* Reset gzip file state */ | |
78 | local void gz_reset(state) | |
79 | gz_statep state; | |
80 | { | |
81 | state.state->x.have = 0; /* no output data available */ | |
82 | if (state.state->mode == GZ_READ) { /* for reading ... */ | |
83 | state.state->eof = 0; /* not at end of file */ | |
84 | state.state->past = 0; /* have not read past end yet */ | |
85 | state.state->how = LOOK; /* look for gzip header */ | |
86 | } | |
87 | state.state->seek = 0; /* no seek request pending */ | |
88 | gz_error(state, Z_OK, NULL); /* clear error */ | |
89 | state.state->x.pos = 0; /* no uncompressed data yet */ | |
90 | state.state->strm.avail_in = 0; /* no input data yet */ | |
91 | } | |
92 | ||
93 | /* Open a gzip file either by name or file descriptor. */ | |
94 | local gzFile gz_open(path, fd, mode) | |
95 | const void *path; | |
96 | int fd; | |
97 | const char *mode; | |
98 | { | |
99 | gz_statep state; | |
11fdf7f2 | 100 | z_size_t len; |
7c673cae FG |
101 | int oflag; |
102 | #ifdef O_CLOEXEC | |
103 | int cloexec = 0; | |
104 | #endif | |
105 | #ifdef O_EXCL | |
106 | int exclusive = 0; | |
107 | #endif | |
108 | ||
109 | /* check input */ | |
110 | if (path == NULL) | |
111 | return NULL; | |
112 | ||
113 | /* allocate gzFile structure to return */ | |
9f95a23c | 114 | state.state = (gz_state*)malloc(sizeof(gz_state)); |
7c673cae FG |
115 | if (state.state == NULL) |
116 | return NULL; | |
117 | state.state->size = 0; /* no buffers allocated yet */ | |
118 | state.state->want = GZBUFSIZE; /* requested buffer size */ | |
119 | state.state->msg = NULL; /* no error message yet */ | |
120 | ||
121 | /* interpret mode */ | |
122 | state.state->mode = GZ_NONE; | |
123 | state.state->level = Z_DEFAULT_COMPRESSION; | |
124 | state.state->strategy = Z_DEFAULT_STRATEGY; | |
125 | state.state->direct = 0; | |
126 | while (*mode) { | |
127 | if (*mode >= '0' && *mode <= '9') | |
128 | state.state->level = *mode - '0'; | |
129 | else | |
130 | switch (*mode) { | |
131 | case 'r': | |
132 | state.state->mode = GZ_READ; | |
133 | break; | |
134 | #ifndef NO_GZCOMPRESS | |
135 | case 'w': | |
136 | state.state->mode = GZ_WRITE; | |
137 | break; | |
138 | case 'a': | |
139 | state.state->mode = GZ_APPEND; | |
140 | break; | |
141 | #endif | |
142 | case '+': /* can't read and write at the same time */ | |
143 | free(state.state); | |
144 | return NULL; | |
145 | case 'b': /* ignore -- will request binary anyway */ | |
146 | break; | |
147 | #ifdef O_CLOEXEC | |
148 | case 'e': | |
149 | cloexec = 1; | |
150 | break; | |
151 | #endif | |
152 | #ifdef O_EXCL | |
153 | case 'x': | |
154 | exclusive = 1; | |
155 | break; | |
156 | #endif | |
157 | case 'f': | |
158 | state.state->strategy = Z_FILTERED; | |
159 | break; | |
160 | case 'h': | |
161 | state.state->strategy = Z_HUFFMAN_ONLY; | |
162 | break; | |
163 | case 'R': | |
164 | state.state->strategy = Z_RLE; | |
165 | break; | |
166 | case 'F': | |
167 | state.state->strategy = Z_FIXED; | |
168 | break; | |
169 | case 'T': | |
170 | state.state->direct = 1; | |
171 | break; | |
172 | default: /* could consider as an error, but just ignore */ | |
173 | ; | |
174 | } | |
175 | mode++; | |
176 | } | |
177 | ||
178 | /* must provide an "r", "w", or "a" */ | |
179 | if (state.state->mode == GZ_NONE) { | |
180 | free(state.state); | |
181 | return NULL; | |
182 | } | |
183 | ||
184 | /* can't force transparent read */ | |
185 | if (state.state->mode == GZ_READ) { | |
186 | if (state.state->direct) { | |
187 | free(state.state); | |
188 | return NULL; | |
189 | } | |
190 | state.state->direct = 1; /* for empty file */ | |
191 | } | |
192 | ||
193 | /* save the path name for error messages */ | |
11fdf7f2 | 194 | #ifdef WIDECHAR |
7c673cae FG |
195 | if (fd == -2) { |
196 | len = wcstombs(NULL, path, 0); | |
11fdf7f2 | 197 | if (len == (z_size_t)-1) |
7c673cae FG |
198 | len = 0; |
199 | } | |
200 | else | |
201 | #endif | |
202 | len = strlen((const char *)path); | |
203 | state.state->path = (char *)malloc(len + 1); | |
204 | if (state.state->path == NULL) { | |
205 | free(state.state); | |
206 | return NULL; | |
207 | } | |
11fdf7f2 | 208 | #ifdef WIDECHAR |
7c673cae FG |
209 | if (fd == -2) |
210 | if (len) | |
211 | wcstombs(state.state->path, path, len + 1); | |
212 | else | |
213 | *(state.state->path) = 0; | |
214 | else | |
215 | #endif | |
216 | #if !defined(NO_snprintf) && !defined(NO_vsnprintf) | |
11fdf7f2 | 217 | (void)snprintf(state.state->path, len + 1, "%s", (const char *)path); |
7c673cae FG |
218 | #else |
219 | strcpy(state.state->path, path); | |
220 | #endif | |
221 | ||
222 | /* compute the flags for open() */ | |
223 | oflag = | |
224 | #ifdef O_LARGEFILE | |
225 | O_LARGEFILE | | |
226 | #endif | |
227 | #ifdef O_BINARY | |
228 | O_BINARY | | |
229 | #endif | |
230 | #ifdef O_CLOEXEC | |
231 | (cloexec ? O_CLOEXEC : 0) | | |
232 | #endif | |
233 | (state.state->mode == GZ_READ ? | |
234 | O_RDONLY : | |
235 | (O_WRONLY | O_CREAT | | |
236 | #ifdef O_EXCL | |
237 | (exclusive ? O_EXCL : 0) | | |
238 | #endif | |
239 | (state.state->mode == GZ_WRITE ? | |
240 | O_TRUNC : | |
241 | O_APPEND))); | |
242 | ||
243 | /* open the file with the appropriate flags (or just use fd) */ | |
244 | state.state->fd = fd > -1 ? fd : ( | |
11fdf7f2 | 245 | #ifdef WIDECHAR |
7c673cae FG |
246 | fd == -2 ? _wopen(path, oflag, 0666) : |
247 | #endif | |
248 | open((const char *)path, oflag, 0666)); | |
249 | if (state.state->fd == -1) { | |
250 | free(state.state->path); | |
251 | free(state.state); | |
252 | return NULL; | |
253 | } | |
11fdf7f2 TL |
254 | if (state.state->mode == GZ_APPEND) { |
255 | LSEEK(state.state->fd, 0, SEEK_END); /* so gzoffset() is correct */ | |
7c673cae | 256 | state.state->mode = GZ_WRITE; /* simplify later checks */ |
11fdf7f2 | 257 | } |
7c673cae FG |
258 | |
259 | /* save the current position for rewinding (only if reading) */ | |
260 | if (state.state->mode == GZ_READ) { | |
261 | state.state->start = LSEEK(state.state->fd, 0, SEEK_CUR); | |
262 | if (state.state->start == -1) state.state->start = 0; | |
263 | } | |
264 | ||
265 | /* initialize stream */ | |
266 | gz_reset(state); | |
267 | ||
268 | /* return stream */ | |
9f95a23c | 269 | return state.file; |
7c673cae FG |
270 | } |
271 | ||
272 | /* -- see zlib.h -- */ | |
273 | gzFile ZEXPORT gzopen(path, mode) | |
274 | const char *path; | |
275 | const char *mode; | |
276 | { | |
277 | return gz_open(path, -1, mode); | |
278 | } | |
279 | ||
280 | /* -- see zlib.h -- */ | |
281 | gzFile ZEXPORT gzopen64(path, mode) | |
282 | const char *path; | |
283 | const char *mode; | |
284 | { | |
285 | return gz_open(path, -1, mode); | |
286 | } | |
287 | ||
288 | /* -- see zlib.h -- */ | |
289 | gzFile ZEXPORT gzdopen(fd, mode) | |
290 | int fd; | |
291 | const char *mode; | |
292 | { | |
293 | char *path; /* identifier for error messages */ | |
294 | gzFile gz; | |
295 | ||
296 | if (fd == -1 || (path = (char *)malloc(7 + 3 * sizeof(int))) == NULL) | |
297 | return NULL; | |
298 | #if !defined(NO_snprintf) && !defined(NO_vsnprintf) | |
11fdf7f2 | 299 | (void)snprintf(path, 7 + 3 * sizeof(int), "<fd:%d>", fd); |
7c673cae FG |
300 | #else |
301 | sprintf(path, "<fd:%d>", fd); /* for debugging */ | |
302 | #endif | |
303 | gz = gz_open(path, fd, mode); | |
304 | free(path); | |
305 | return gz; | |
306 | } | |
307 | ||
308 | /* -- see zlib.h -- */ | |
11fdf7f2 | 309 | #ifdef WIDECHAR |
7c673cae FG |
310 | gzFile ZEXPORT gzopen_w(path, mode) |
311 | const wchar_t *path; | |
312 | const char *mode; | |
313 | { | |
314 | return gz_open(path, -2, mode); | |
315 | } | |
316 | #endif | |
317 | ||
318 | /* -- see zlib.h -- */ | |
319 | int ZEXPORT gzbuffer(file, size) | |
320 | gzFile file; | |
321 | unsigned size; | |
322 | { | |
323 | gz_statep state; | |
324 | ||
325 | /* get internal structure and check integrity */ | |
326 | if (file == NULL) | |
327 | return -1; | |
328 | state = (gz_statep)file; | |
329 | if (state.state->mode != GZ_READ && state.state->mode != GZ_WRITE) | |
330 | return -1; | |
331 | ||
332 | /* make sure we haven't already allocated memory */ | |
333 | if (state.state->size != 0) | |
334 | return -1; | |
335 | ||
336 | /* check and set requested size */ | |
11fdf7f2 TL |
337 | if ((size << 1) < size) |
338 | return -1; /* need to be able to double it */ | |
7c673cae FG |
339 | if (size < 2) |
340 | size = 2; /* need two bytes to check magic header */ | |
341 | state.state->want = size; | |
342 | return 0; | |
343 | } | |
344 | ||
345 | /* -- see zlib.h -- */ | |
346 | int ZEXPORT gzrewind(file) | |
347 | gzFile file; | |
348 | { | |
349 | gz_statep state; | |
350 | ||
351 | /* get internal structure */ | |
352 | if (file == NULL) | |
353 | return -1; | |
354 | state = (gz_statep)file; | |
355 | ||
356 | /* check that we're reading and that there's no error */ | |
357 | if (state.state->mode != GZ_READ || | |
358 | (state.state->err != Z_OK && state.state->err != Z_BUF_ERROR)) | |
359 | return -1; | |
360 | ||
361 | /* back up and start over */ | |
362 | if (LSEEK(state.state->fd, state.state->start, SEEK_SET) == -1) | |
363 | return -1; | |
364 | gz_reset(state); | |
365 | return 0; | |
366 | } | |
367 | ||
368 | /* -- see zlib.h -- */ | |
369 | z_off64_t ZEXPORT gzseek64(file, offset, whence) | |
370 | gzFile file; | |
371 | z_off64_t offset; | |
372 | int whence; | |
373 | { | |
374 | unsigned n; | |
375 | z_off64_t ret; | |
376 | gz_statep state; | |
377 | ||
378 | /* get internal structure and check integrity */ | |
379 | if (file == NULL) | |
380 | return -1; | |
381 | state = (gz_statep)file; | |
382 | if (state.state->mode != GZ_READ && state.state->mode != GZ_WRITE) | |
383 | return -1; | |
384 | ||
385 | /* check that there's no error */ | |
386 | if (state.state->err != Z_OK && state.state->err != Z_BUF_ERROR) | |
387 | return -1; | |
388 | ||
389 | /* can only seek from start or relative to current position */ | |
390 | if (whence != SEEK_SET && whence != SEEK_CUR) | |
391 | return -1; | |
392 | ||
393 | /* normalize offset to a SEEK_CUR specification */ | |
394 | if (whence == SEEK_SET) | |
395 | offset -= state.state->x.pos; | |
396 | else if (state.state->seek) | |
397 | offset += state.state->skip; | |
398 | state.state->seek = 0; | |
399 | ||
400 | /* if within raw area while reading, just go there */ | |
401 | if (state.state->mode == GZ_READ && state.state->how == COPY && | |
402 | state.state->x.pos + offset >= 0) { | |
403 | ret = LSEEK(state.state->fd, offset - state.state->x.have, SEEK_CUR); | |
404 | if (ret == -1) | |
405 | return -1; | |
406 | state.state->x.have = 0; | |
407 | state.state->eof = 0; | |
408 | state.state->past = 0; | |
409 | state.state->seek = 0; | |
410 | gz_error(state, Z_OK, NULL); | |
411 | state.state->strm.avail_in = 0; | |
412 | state.state->x.pos += offset; | |
413 | return state.state->x.pos; | |
414 | } | |
415 | ||
416 | /* calculate skip amount, rewinding if needed for back seek when reading */ | |
417 | if (offset < 0) { | |
418 | if (state.state->mode != GZ_READ) /* writing -- can't go backwards */ | |
419 | return -1; | |
420 | offset += state.state->x.pos; | |
421 | if (offset < 0) /* before start of file! */ | |
422 | return -1; | |
423 | if (gzrewind(file) == -1) /* rewind, then skip to offset */ | |
424 | return -1; | |
425 | } | |
426 | ||
427 | /* if reading, skip what's in output buffer (one less gzgetc() check) */ | |
428 | if (state.state->mode == GZ_READ) { | |
429 | n = GT_OFF(state.state->x.have) || (z_off64_t)state.state->x.have > offset ? | |
430 | (unsigned)offset : state.state->x.have; | |
431 | state.state->x.have -= n; | |
432 | state.state->x.next += n; | |
433 | state.state->x.pos += n; | |
434 | offset -= n; | |
435 | } | |
436 | ||
437 | /* request skip (if not zero) */ | |
438 | if (offset) { | |
439 | state.state->seek = 1; | |
440 | state.state->skip = offset; | |
441 | } | |
442 | return state.state->x.pos + offset; | |
443 | } | |
444 | ||
445 | /* -- see zlib.h -- */ | |
446 | z_off_t ZEXPORT gzseek(file, offset, whence) | |
447 | gzFile file; | |
448 | z_off_t offset; | |
449 | int whence; | |
450 | { | |
451 | z_off64_t ret; | |
452 | ||
453 | ret = gzseek64(file, (z_off64_t)offset, whence); | |
454 | return ret == (z_off_t)ret ? (z_off_t)ret : -1; | |
455 | } | |
456 | ||
457 | /* -- see zlib.h -- */ | |
458 | z_off64_t ZEXPORT gztell64(file) | |
459 | gzFile file; | |
460 | { | |
461 | gz_statep state; | |
462 | ||
463 | /* get internal structure and check integrity */ | |
464 | if (file == NULL) | |
465 | return -1; | |
466 | state = (gz_statep)file; | |
467 | if (state.state->mode != GZ_READ && state.state->mode != GZ_WRITE) | |
468 | return -1; | |
469 | ||
470 | /* return position */ | |
471 | return state.state->x.pos + (state.state->seek ? state.state->skip : 0); | |
472 | } | |
473 | ||
474 | /* -- see zlib.h -- */ | |
475 | z_off_t ZEXPORT gztell(file) | |
476 | gzFile file; | |
477 | { | |
478 | z_off64_t ret; | |
479 | ||
480 | ret = gztell64(file); | |
481 | return ret == (z_off_t)ret ? (z_off_t)ret : -1; | |
482 | } | |
483 | ||
484 | /* -- see zlib.h -- */ | |
485 | z_off64_t ZEXPORT gzoffset64(file) | |
486 | gzFile file; | |
487 | { | |
488 | z_off64_t offset; | |
489 | gz_statep state; | |
490 | ||
491 | /* get internal structure and check integrity */ | |
492 | if (file == NULL) | |
493 | return -1; | |
494 | state = (gz_statep)file; | |
495 | if (state.state->mode != GZ_READ && state.state->mode != GZ_WRITE) | |
496 | return -1; | |
497 | ||
498 | /* compute and return effective offset in file */ | |
499 | offset = LSEEK(state.state->fd, 0, SEEK_CUR); | |
500 | if (offset == -1) | |
501 | return -1; | |
502 | if (state.state->mode == GZ_READ) /* reading */ | |
503 | offset -= state.state->strm.avail_in; /* don't count buffered input */ | |
504 | return offset; | |
505 | } | |
506 | ||
507 | /* -- see zlib.h -- */ | |
508 | z_off_t ZEXPORT gzoffset(file) | |
509 | gzFile file; | |
510 | { | |
511 | z_off64_t ret; | |
512 | ||
513 | ret = gzoffset64(file); | |
514 | return ret == (z_off_t)ret ? (z_off_t)ret : -1; | |
515 | } | |
516 | ||
517 | /* -- see zlib.h -- */ | |
518 | int ZEXPORT gzeof(file) | |
519 | gzFile file; | |
520 | { | |
521 | gz_statep state; | |
522 | ||
523 | /* get internal structure and check integrity */ | |
524 | if (file == NULL) | |
525 | return 0; | |
526 | state = (gz_statep)file; | |
527 | if (state.state->mode != GZ_READ && state.state->mode != GZ_WRITE) | |
528 | return 0; | |
529 | ||
530 | /* return end-of-file state */ | |
531 | return state.state->mode == GZ_READ ? state.state->past : 0; | |
532 | } | |
533 | ||
534 | /* -- see zlib.h -- */ | |
535 | const char * ZEXPORT gzerror(file, errnum) | |
536 | gzFile file; | |
537 | int *errnum; | |
538 | { | |
539 | gz_statep state; | |
540 | ||
541 | /* get internal structure and check integrity */ | |
542 | if (file == NULL) | |
543 | return NULL; | |
544 | state = (gz_statep)file; | |
545 | if (state.state->mode != GZ_READ && state.state->mode != GZ_WRITE) | |
546 | return NULL; | |
547 | ||
548 | /* return error information */ | |
549 | if (errnum != NULL) | |
550 | *errnum = state.state->err; | |
551 | return state.state->err == Z_MEM_ERROR ? "out of memory" : | |
552 | (state.state->msg == NULL ? "" : state.state->msg); | |
553 | } | |
554 | ||
555 | /* -- see zlib.h -- */ | |
556 | void ZEXPORT gzclearerr(file) | |
557 | gzFile file; | |
558 | { | |
559 | gz_statep state; | |
560 | ||
561 | /* get internal structure and check integrity */ | |
562 | if (file == NULL) | |
563 | return; | |
564 | state = (gz_statep)file; | |
565 | if (state.state->mode != GZ_READ && state.state->mode != GZ_WRITE) | |
566 | return; | |
567 | ||
568 | /* clear error and end-of-file */ | |
569 | if (state.state->mode == GZ_READ) { | |
570 | state.state->eof = 0; | |
571 | state.state->past = 0; | |
572 | } | |
573 | gz_error(state, Z_OK, NULL); | |
574 | } | |
575 | ||
11fdf7f2 TL |
576 | /* Create an error message in allocated memory and set state.state->err and |
577 | state.state->msg accordingly. Free any previous error message already there. Do | |
7c673cae FG |
578 | not try to free or allocate space if the error is Z_MEM_ERROR (out of |
579 | memory). Simply save the error message as a static string. If there is an | |
580 | allocation failure constructing the error message, then convert the error to | |
581 | out of memory. */ | |
582 | void ZLIB_INTERNAL gz_error(state, err, msg) | |
583 | gz_statep state; | |
584 | int err; | |
585 | const char *msg; | |
586 | { | |
587 | /* free previously allocated message and clear */ | |
588 | if (state.state->msg != NULL) { | |
589 | if (state.state->err != Z_MEM_ERROR) | |
590 | free(state.state->msg); | |
591 | state.state->msg = NULL; | |
592 | } | |
593 | ||
11fdf7f2 | 594 | /* if fatal, set state.state->x.have to 0 so that the gzgetc() macro fails */ |
7c673cae FG |
595 | if (err != Z_OK && err != Z_BUF_ERROR) |
596 | state.state->x.have = 0; | |
597 | ||
598 | /* set error code, and if no message, then done */ | |
599 | state.state->err = err; | |
600 | if (msg == NULL) | |
601 | return; | |
602 | ||
603 | /* for an out of memory error, return literal string when requested */ | |
604 | if (err == Z_MEM_ERROR) | |
605 | return; | |
606 | ||
607 | /* construct error message with path */ | |
608 | if ((state.state->msg = (char *)malloc(strlen(state.state->path) + strlen(msg) + 3)) == | |
609 | NULL) { | |
610 | state.state->err = Z_MEM_ERROR; | |
611 | return; | |
612 | } | |
613 | #if !defined(NO_snprintf) && !defined(NO_vsnprintf) | |
11fdf7f2 TL |
614 | (void)snprintf(state.state->msg, strlen(state.state->path) + strlen(msg) + 3, |
615 | "%s%s%s", state.state->path, ": ", msg); | |
7c673cae FG |
616 | #else |
617 | strcpy(state.state->msg, state.state->path); | |
618 | strcat(state.state->msg, ": "); | |
619 | strcat(state.state->msg, msg); | |
620 | #endif | |
7c673cae FG |
621 | } |
622 | ||
623 | #ifndef INT_MAX | |
624 | /* portably return maximum value for an int (when limits.h presumed not | |
625 | available) -- we need to do this to cover cases where 2's complement not | |
626 | used, since C standard permits 1's complement and sign-bit representations, | |
627 | otherwise we could just use ((unsigned)-1) >> 1 */ | |
628 | unsigned ZLIB_INTERNAL gz_intmax() | |
629 | { | |
630 | unsigned p, q; | |
631 | ||
632 | p = 1; | |
633 | do { | |
634 | q = p; | |
635 | p <<= 1; | |
636 | p++; | |
637 | } while (p > q); | |
638 | return q >> 1; | |
639 | } | |
640 | #endif |