File: | src/lib/libz/gzread.c |
Warning: | line 399, column 43 Division by zero |
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1 | /* gzread.c -- zlib functions for reading gzip files | |||
2 | * Copyright (C) 2004-2017 Mark Adler | |||
3 | * For conditions of distribution and use, see copyright notice in zlib.h | |||
4 | */ | |||
5 | ||||
6 | #include "gzguts.h" | |||
7 | ||||
8 | /* Use read() to load a buffer -- return -1 on error, otherwise 0. Read from | |||
9 | state->fd, and update state->eof, state->err, and state->msg as appropriate. | |||
10 | This function needs to loop on read(), since read() is not guaranteed to | |||
11 | read the number of bytes requested, depending on the type of descriptor. */ | |||
12 | localstatic int gz_load(gz_statep state, unsigned char *buf, unsigned len, | |||
13 | unsigned *have) { | |||
14 | int ret; | |||
15 | unsigned get, max = ((unsigned)-1 >> 2) + 1; | |||
16 | ||||
17 | *have = 0; | |||
18 | do { | |||
19 | get = len - *have; | |||
20 | if (get > max) | |||
21 | get = max; | |||
22 | ret = read(state->fd, buf + *have, get); | |||
23 | if (ret <= 0) | |||
24 | break; | |||
25 | *have += (unsigned)ret; | |||
26 | } while (*have < len); | |||
27 | if (ret < 0) { | |||
28 | gz_error(state, Z_ERRNO(-1), zstrerror()strerror((*__errno()))); | |||
29 | return -1; | |||
30 | } | |||
31 | if (ret == 0) | |||
32 | state->eof = 1; | |||
33 | return 0; | |||
34 | } | |||
35 | ||||
36 | /* Load up input buffer and set eof flag if last data loaded -- return -1 on | |||
37 | error, 0 otherwise. Note that the eof flag is set when the end of the input | |||
38 | file is reached, even though there may be unused data in the buffer. Once | |||
39 | that data has been used, no more attempts will be made to read the file. | |||
40 | If strm->avail_in != 0, then the current data is moved to the beginning of | |||
41 | the input buffer, and then the remainder of the buffer is loaded with the | |||
42 | available data from the input file. */ | |||
43 | localstatic int gz_avail(gz_statep state) { | |||
44 | unsigned got; | |||
45 | z_streamp strm = &(state->strm); | |||
46 | ||||
47 | if (state->err != Z_OK0 && state->err != Z_BUF_ERROR(-5)) | |||
48 | return -1; | |||
49 | if (state->eof == 0) { | |||
50 | if (strm->avail_in) { /* copy what's there to the start */ | |||
51 | unsigned char *p = state->in; | |||
52 | unsigned const char *q = strm->next_in; | |||
53 | unsigned n = strm->avail_in; | |||
54 | do { | |||
55 | *p++ = *q++; | |||
56 | } while (--n); | |||
57 | } | |||
58 | if (gz_load(state, state->in + strm->avail_in, | |||
59 | state->size - strm->avail_in, &got) == -1) | |||
60 | return -1; | |||
61 | strm->avail_in += got; | |||
62 | strm->next_in = state->in; | |||
63 | } | |||
64 | return 0; | |||
65 | } | |||
66 | ||||
67 | /* Look for gzip header, set up for inflate or copy. state->x.have must be 0. | |||
68 | If this is the first time in, allocate required memory. state->how will be | |||
69 | left unchanged if there is no more input data available, will be set to COPY | |||
70 | if there is no gzip header and direct copying will be performed, or it will | |||
71 | be set to GZIP for decompression. If direct copying, then leftover input | |||
72 | data from the input buffer will be copied to the output buffer. In that | |||
73 | case, all further file reads will be directly to either the output buffer or | |||
74 | a user buffer. If decompressing, the inflate state will be initialized. | |||
75 | gz_look() will return 0 on success or -1 on failure. */ | |||
76 | localstatic int gz_look(gz_statep state) { | |||
77 | z_streamp strm = &(state->strm); | |||
78 | ||||
79 | /* allocate read buffers and inflate memory */ | |||
80 | if (state->size == 0) { | |||
81 | /* allocate buffers */ | |||
82 | state->in = (unsigned char *)malloc(state->want); | |||
83 | state->out = (unsigned char *)malloc(state->want << 1); | |||
84 | if (state->in == NULL((void *)0) || state->out == NULL((void *)0)) { | |||
85 | free(state->out); | |||
86 | free(state->in); | |||
87 | gz_error(state, Z_MEM_ERROR(-4), "out of memory"); | |||
88 | return -1; | |||
89 | } | |||
90 | state->size = state->want; | |||
91 | ||||
92 | /* allocate inflate memory */ | |||
93 | state->strm.zalloc = Z_NULL0; | |||
94 | state->strm.zfree = Z_NULL0; | |||
95 | state->strm.opaque = Z_NULL0; | |||
96 | state->strm.avail_in = 0; | |||
97 | state->strm.next_in = Z_NULL0; | |||
98 | if (inflateInit2(&(state->strm), 15 + 16)inflateInit2_((&(state->strm)), (15 + 16), "1.3.0.1-motley" , (int)sizeof(z_stream)) != Z_OK0) { /* gunzip */ | |||
99 | free(state->out); | |||
100 | free(state->in); | |||
101 | state->size = 0; | |||
102 | gz_error(state, Z_MEM_ERROR(-4), "out of memory"); | |||
103 | return -1; | |||
104 | } | |||
105 | } | |||
106 | ||||
107 | /* get at least the magic bytes in the input buffer */ | |||
108 | if (strm->avail_in < 2) { | |||
109 | if (gz_avail(state) == -1) | |||
110 | return -1; | |||
111 | if (strm->avail_in == 0) | |||
112 | return 0; | |||
113 | } | |||
114 | ||||
115 | /* look for gzip magic bytes -- if there, do gzip decoding (note: there is | |||
116 | a logical dilemma here when considering the case of a partially written | |||
117 | gzip file, to wit, if a single 31 byte is written, then we cannot tell | |||
118 | whether this is a single-byte file, or just a partially written gzip | |||
119 | file -- for here we assume that if a gzip file is being written, then | |||
120 | the header will be written in a single operation, so that reading a | |||
121 | single byte is sufficient indication that it is not a gzip file) */ | |||
122 | if (strm->avail_in > 1 && | |||
123 | strm->next_in[0] == 31 && strm->next_in[1] == 139) { | |||
124 | inflateReset(strm); | |||
125 | state->how = GZIP2; | |||
126 | state->direct = 0; | |||
127 | return 0; | |||
128 | } | |||
129 | ||||
130 | /* no gzip header -- if we were decoding gzip before, then this is trailing | |||
131 | garbage. Ignore the trailing garbage and finish. */ | |||
132 | if (state->direct == 0) { | |||
133 | strm->avail_in = 0; | |||
134 | state->eof = 1; | |||
135 | state->x.have = 0; | |||
136 | return 0; | |||
137 | } | |||
138 | ||||
139 | /* doing raw i/o, copy any leftover input to output -- this assumes that | |||
140 | the output buffer is larger than the input buffer, which also assures | |||
141 | space for gzungetc() */ | |||
142 | state->x.next = state->out; | |||
143 | memcpy(state->x.next, strm->next_in, strm->avail_in); | |||
144 | state->x.have = strm->avail_in; | |||
145 | strm->avail_in = 0; | |||
146 | state->how = COPY1; | |||
147 | state->direct = 1; | |||
148 | return 0; | |||
149 | } | |||
150 | ||||
151 | /* Decompress from input to the provided next_out and avail_out in the state. | |||
152 | On return, state->x.have and state->x.next point to the just decompressed | |||
153 | data. If the gzip stream completes, state->how is reset to LOOK to look for | |||
154 | the next gzip stream or raw data, once state->x.have is depleted. Returns 0 | |||
155 | on success, -1 on failure. */ | |||
156 | localstatic int gz_decomp(gz_statep state) { | |||
157 | int ret = Z_OK0; | |||
158 | unsigned had; | |||
159 | z_streamp strm = &(state->strm); | |||
160 | ||||
161 | /* fill output buffer up to end of deflate stream */ | |||
162 | had = strm->avail_out; | |||
163 | do { | |||
164 | /* get more input for inflate() */ | |||
165 | if (strm->avail_in == 0 && gz_avail(state) == -1) | |||
166 | return -1; | |||
167 | if (strm->avail_in == 0) { | |||
168 | gz_error(state, Z_BUF_ERROR(-5), "unexpected end of file"); | |||
169 | break; | |||
170 | } | |||
171 | ||||
172 | /* decompress and handle errors */ | |||
173 | ret = inflate(strm, Z_NO_FLUSH0); | |||
174 | if (ret == Z_STREAM_ERROR(-2) || ret == Z_NEED_DICT2) { | |||
175 | gz_error(state, Z_STREAM_ERROR(-2), | |||
176 | "internal error: inflate stream corrupt"); | |||
177 | return -1; | |||
178 | } | |||
179 | if (ret == Z_MEM_ERROR(-4)) { | |||
180 | gz_error(state, Z_MEM_ERROR(-4), "out of memory"); | |||
181 | return -1; | |||
182 | } | |||
183 | if (ret == Z_DATA_ERROR(-3)) { /* deflate stream invalid */ | |||
184 | gz_error(state, Z_DATA_ERROR(-3), | |||
185 | strm->msg == NULL((void *)0) ? "compressed data error" : strm->msg); | |||
186 | return -1; | |||
187 | } | |||
188 | } while (strm->avail_out && ret != Z_STREAM_END1); | |||
189 | ||||
190 | /* update available output */ | |||
191 | state->x.have = had - strm->avail_out; | |||
192 | state->x.next = strm->next_out - state->x.have; | |||
193 | ||||
194 | /* if the gzip stream completed successfully, look for another */ | |||
195 | if (ret == Z_STREAM_END1) | |||
196 | state->how = LOOK0; | |||
197 | ||||
198 | /* good decompression */ | |||
199 | return 0; | |||
200 | } | |||
201 | ||||
202 | /* Fetch data and put it in the output buffer. Assumes state->x.have is 0. | |||
203 | Data is either copied from the input file or decompressed from the input | |||
204 | file depending on state->how. If state->how is LOOK, then a gzip header is | |||
205 | looked for to determine whether to copy or decompress. Returns -1 on error, | |||
206 | otherwise 0. gz_fetch() will leave state->how as COPY or GZIP unless the | |||
207 | end of the input file has been reached and all data has been processed. */ | |||
208 | localstatic int gz_fetch(gz_statep state) { | |||
209 | z_streamp strm = &(state->strm); | |||
210 | ||||
211 | do { | |||
212 | switch(state->how) { | |||
213 | case LOOK0: /* -> LOOK, COPY (only if never GZIP), or GZIP */ | |||
214 | if (gz_look(state) == -1) | |||
215 | return -1; | |||
216 | if (state->how == LOOK0) | |||
217 | return 0; | |||
218 | break; | |||
219 | case COPY1: /* -> COPY */ | |||
220 | if (gz_load(state, state->out, state->size << 1, &(state->x.have)) | |||
221 | == -1) | |||
222 | return -1; | |||
223 | state->x.next = state->out; | |||
224 | return 0; | |||
225 | case GZIP2: /* -> GZIP or LOOK (if end of gzip stream) */ | |||
226 | strm->avail_out = state->size << 1; | |||
227 | strm->next_out = state->out; | |||
228 | if (gz_decomp(state) == -1) | |||
229 | return -1; | |||
230 | } | |||
231 | } while (state->x.have == 0 && (!state->eof || strm->avail_in)); | |||
232 | return 0; | |||
233 | } | |||
234 | ||||
235 | /* Skip len uncompressed bytes of output. Return -1 on error, 0 on success. */ | |||
236 | localstatic int gz_skip(gz_statep state, z_off64_toff_t len) { | |||
237 | unsigned n; | |||
238 | ||||
239 | /* skip over len bytes or reach end-of-file, whichever comes first */ | |||
240 | while (len) | |||
241 | /* skip over whatever is in output buffer */ | |||
242 | if (state->x.have) { | |||
243 | n = GT_OFF(state->x.have)(sizeof(int) == sizeof(off_t) && (state->x.have) > 0x7fffffff) || (z_off64_toff_t)state->x.have > len ? | |||
244 | (unsigned)len : state->x.have; | |||
245 | state->x.have -= n; | |||
246 | state->x.next += n; | |||
247 | state->x.pos += n; | |||
248 | len -= n; | |||
249 | } | |||
250 | ||||
251 | /* output buffer empty -- return if we're at the end of the input */ | |||
252 | else if (state->eof && state->strm.avail_in == 0) | |||
253 | break; | |||
254 | ||||
255 | /* need more data to skip -- load up output buffer */ | |||
256 | else { | |||
257 | /* get more output, looking for header if required */ | |||
258 | if (gz_fetch(state) == -1) | |||
259 | return -1; | |||
260 | } | |||
261 | return 0; | |||
262 | } | |||
263 | ||||
264 | /* Read len bytes into buf from file, or less than len up to the end of the | |||
265 | input. Return the number of bytes read. If zero is returned, either the | |||
266 | end of file was reached, or there was an error. state->err must be | |||
267 | consulted in that case to determine which. */ | |||
268 | localstatic z_size_t gz_read(gz_statep state, voidp buf, z_size_t len) { | |||
269 | z_size_t got; | |||
270 | unsigned n; | |||
271 | ||||
272 | /* if len is zero, avoid unnecessary operations */ | |||
273 | if (len == 0) | |||
274 | return 0; | |||
275 | ||||
276 | /* process a skip request */ | |||
277 | if (state->seek) { | |||
278 | state->seek = 0; | |||
279 | if (gz_skip(state, state->skip) == -1) | |||
280 | return 0; | |||
281 | } | |||
282 | ||||
283 | /* get len bytes to buf, or less than len if at the end */ | |||
284 | got = 0; | |||
285 | do { | |||
286 | /* set n to the maximum amount of len that fits in an unsigned int */ | |||
287 | n = (unsigned)-1; | |||
288 | if (n > len) | |||
289 | n = (unsigned)len; | |||
290 | ||||
291 | /* first just try copying data from the output buffer */ | |||
292 | if (state->x.have) { | |||
293 | if (state->x.have < n) | |||
294 | n = state->x.have; | |||
295 | memcpy(buf, state->x.next, n); | |||
296 | state->x.next += n; | |||
297 | state->x.have -= n; | |||
298 | } | |||
299 | ||||
300 | /* output buffer empty -- return if we're at the end of the input */ | |||
301 | else if (state->eof && state->strm.avail_in == 0) { | |||
302 | state->past = 1; /* tried to read past end */ | |||
303 | break; | |||
304 | } | |||
305 | ||||
306 | /* need output data -- for small len or new stream load up our output | |||
307 | buffer */ | |||
308 | else if (state->how == LOOK0 || n < (state->size << 1)) { | |||
309 | /* get more output, looking for header if required */ | |||
310 | if (gz_fetch(state) == -1) | |||
311 | return 0; | |||
312 | continue; /* no progress yet -- go back to copy above */ | |||
313 | /* the copy above assures that we will leave with space in the | |||
314 | output buffer, allowing at least one gzungetc() to succeed */ | |||
315 | } | |||
316 | ||||
317 | /* large len -- read directly into user buffer */ | |||
318 | else if (state->how == COPY1) { /* read directly */ | |||
319 | if (gz_load(state, (unsigned char *)buf, n, &n) == -1) | |||
320 | return 0; | |||
321 | } | |||
322 | ||||
323 | /* large len -- decompress directly into user buffer */ | |||
324 | else { /* state->how == GZIP */ | |||
325 | state->strm.avail_out = n; | |||
326 | state->strm.next_out = (unsigned char *)buf; | |||
327 | if (gz_decomp(state) == -1) | |||
328 | return 0; | |||
329 | n = state->x.have; | |||
330 | state->x.have = 0; | |||
331 | } | |||
332 | ||||
333 | /* update progress */ | |||
334 | len -= n; | |||
335 | buf = (char *)buf + n; | |||
336 | got += n; | |||
337 | state->x.pos += n; | |||
338 | } while (len); | |||
339 | ||||
340 | /* return number of bytes read into user buffer */ | |||
341 | return got; | |||
342 | } | |||
343 | ||||
344 | /* -- see zlib.h -- */ | |||
345 | int ZEXPORT gzread(gzFile file, voidp buf, unsigned len) { | |||
346 | gz_statep state; | |||
347 | ||||
348 | /* get internal structure */ | |||
349 | if (file == NULL((void *)0)) | |||
350 | return -1; | |||
351 | state = (gz_statep)file; | |||
352 | ||||
353 | /* check that we're reading and that there's no (serious) error */ | |||
354 | if (state->mode != GZ_READ7247 || | |||
355 | (state->err != Z_OK0 && state->err != Z_BUF_ERROR(-5))) | |||
356 | return -1; | |||
357 | ||||
358 | /* since an int is returned, make sure len fits in one, otherwise return | |||
359 | with an error (this avoids a flaw in the interface) */ | |||
360 | if ((int)len < 0) { | |||
361 | gz_error(state, Z_STREAM_ERROR(-2), "request does not fit in an int"); | |||
362 | return -1; | |||
363 | } | |||
364 | ||||
365 | /* read len or fewer bytes to buf */ | |||
366 | len = (unsigned)gz_read(state, buf, len); | |||
367 | ||||
368 | /* check for an error */ | |||
369 | if (len == 0 && state->err != Z_OK0 && state->err != Z_BUF_ERROR(-5)) | |||
370 | return -1; | |||
371 | ||||
372 | /* return the number of bytes read (this is assured to fit in an int) */ | |||
373 | return (int)len; | |||
374 | } | |||
375 | ||||
376 | /* -- see zlib.h -- */ | |||
377 | z_size_t ZEXPORT gzfread(voidp buf, z_size_t size, z_size_t nitems, gzFile file) { | |||
378 | z_size_t len; | |||
379 | gz_statep state; | |||
380 | ||||
381 | /* get internal structure */ | |||
382 | if (file == NULL((void *)0)) | |||
| ||||
383 | return 0; | |||
384 | state = (gz_statep)file; | |||
385 | ||||
386 | /* check that we're reading and that there's no (serious) error */ | |||
387 | if (state->mode != GZ_READ7247 || | |||
388 | (state->err != Z_OK0 && state->err != Z_BUF_ERROR(-5))) | |||
389 | return 0; | |||
390 | ||||
391 | /* compute bytes to read -- error on overflow */ | |||
392 | len = nitems * size; | |||
393 | if (size && len / size != nitems) { | |||
394 | gz_error(state, Z_STREAM_ERROR(-2), "request does not fit in a size_t"); | |||
395 | return 0; | |||
396 | } | |||
397 | ||||
398 | /* read len or fewer bytes to buf, return the number of full items read */ | |||
399 | return len ? gz_read(state, buf, len) / size : 0; | |||
| ||||
400 | } | |||
401 | ||||
402 | /* -- see zlib.h -- */ | |||
403 | #ifdef Z_PREFIX_SET | |||
404 | # undef z_gzgetc | |||
405 | #else | |||
406 | # undef gzgetc | |||
407 | #endif | |||
408 | int ZEXPORT gzgetc(gzFile file) { | |||
409 | unsigned char buf[1]; | |||
410 | gz_statep state; | |||
411 | ||||
412 | /* get internal structure */ | |||
413 | if (file == NULL((void *)0)) | |||
414 | return -1; | |||
415 | state = (gz_statep)file; | |||
416 | ||||
417 | /* check that we're reading and that there's no (serious) error */ | |||
418 | if (state->mode != GZ_READ7247 || | |||
419 | (state->err != Z_OK0 && state->err != Z_BUF_ERROR(-5))) | |||
420 | return -1; | |||
421 | ||||
422 | /* try output buffer (no need to check for skip request) */ | |||
423 | if (state->x.have) { | |||
424 | state->x.have--; | |||
425 | state->x.pos++; | |||
426 | return *(state->x.next)++; | |||
427 | } | |||
428 | ||||
429 | /* nothing there -- try gz_read() */ | |||
430 | return gz_read(state, buf, 1) < 1 ? -1 : buf[0]; | |||
431 | } | |||
432 | ||||
433 | int ZEXPORT gzgetc_(gzFile file) { | |||
434 | return gzgetc(file); | |||
435 | } | |||
436 | ||||
437 | /* -- see zlib.h -- */ | |||
438 | int ZEXPORT gzungetc(int c, gzFile file) { | |||
439 | gz_statep state; | |||
440 | ||||
441 | /* get internal structure */ | |||
442 | if (file == NULL((void *)0)) | |||
443 | return -1; | |||
444 | state = (gz_statep)file; | |||
445 | ||||
446 | /* in case this was just opened, set up the input buffer */ | |||
447 | if (state->mode == GZ_READ7247 && state->how == LOOK0 && state->x.have == 0) | |||
448 | (void)gz_look(state); | |||
449 | ||||
450 | /* check that we're reading and that there's no (serious) error */ | |||
451 | if (state->mode != GZ_READ7247 || | |||
452 | (state->err != Z_OK0 && state->err != Z_BUF_ERROR(-5))) | |||
453 | return -1; | |||
454 | ||||
455 | /* process a skip request */ | |||
456 | if (state->seek) { | |||
457 | state->seek = 0; | |||
458 | if (gz_skip(state, state->skip) == -1) | |||
459 | return -1; | |||
460 | } | |||
461 | ||||
462 | /* can't push EOF */ | |||
463 | if (c < 0) | |||
464 | return -1; | |||
465 | ||||
466 | /* if output buffer empty, put byte at end (allows more pushing) */ | |||
467 | if (state->x.have == 0) { | |||
468 | state->x.have = 1; | |||
469 | state->x.next = state->out + (state->size << 1) - 1; | |||
470 | state->x.next[0] = (unsigned char)c; | |||
471 | state->x.pos--; | |||
472 | state->past = 0; | |||
473 | return c; | |||
474 | } | |||
475 | ||||
476 | /* if no room, give up (must have already done a gzungetc()) */ | |||
477 | if (state->x.have == (state->size << 1)) { | |||
478 | gz_error(state, Z_DATA_ERROR(-3), "out of room to push characters"); | |||
479 | return -1; | |||
480 | } | |||
481 | ||||
482 | /* slide output data if needed and insert byte before existing data */ | |||
483 | if (state->x.next == state->out) { | |||
484 | unsigned char *src = state->out + state->x.have; | |||
485 | unsigned char *dest = state->out + (state->size << 1); | |||
486 | while (src > state->out) | |||
487 | *--dest = *--src; | |||
488 | state->x.next = dest; | |||
489 | } | |||
490 | state->x.have++; | |||
491 | state->x.next--; | |||
492 | state->x.next[0] = (unsigned char)c; | |||
493 | state->x.pos--; | |||
494 | state->past = 0; | |||
495 | return c; | |||
496 | } | |||
497 | ||||
498 | /* -- see zlib.h -- */ | |||
499 | char * ZEXPORT gzgets(gzFile file, char *buf, int len) { | |||
500 | unsigned left, n; | |||
501 | char *str; | |||
502 | unsigned char *eol; | |||
503 | gz_statep state; | |||
504 | ||||
505 | /* check parameters and get internal structure */ | |||
506 | if (file == NULL((void *)0) || buf == NULL((void *)0) || len < 1) | |||
507 | return NULL((void *)0); | |||
508 | state = (gz_statep)file; | |||
509 | ||||
510 | /* check that we're reading and that there's no (serious) error */ | |||
511 | if (state->mode != GZ_READ7247 || | |||
512 | (state->err != Z_OK0 && state->err != Z_BUF_ERROR(-5))) | |||
513 | return NULL((void *)0); | |||
514 | ||||
515 | /* process a skip request */ | |||
516 | if (state->seek) { | |||
517 | state->seek = 0; | |||
518 | if (gz_skip(state, state->skip) == -1) | |||
519 | return NULL((void *)0); | |||
520 | } | |||
521 | ||||
522 | /* copy output bytes up to new line or len - 1, whichever comes first -- | |||
523 | append a terminating zero to the string (we don't check for a zero in | |||
524 | the contents, let the user worry about that) */ | |||
525 | str = buf; | |||
526 | left = (unsigned)len - 1; | |||
527 | if (left) do { | |||
528 | /* assure that something is in the output buffer */ | |||
529 | if (state->x.have == 0 && gz_fetch(state) == -1) | |||
530 | return NULL((void *)0); /* error */ | |||
531 | if (state->x.have == 0) { /* end of file */ | |||
532 | state->past = 1; /* read past end */ | |||
533 | break; /* return what we have */ | |||
534 | } | |||
535 | ||||
536 | /* look for end-of-line in current output buffer */ | |||
537 | n = state->x.have > left ? left : state->x.have; | |||
538 | eol = (unsigned char *)memchr(state->x.next, '\n', n); | |||
539 | if (eol != NULL((void *)0)) | |||
540 | n = (unsigned)(eol - state->x.next) + 1; | |||
541 | ||||
542 | /* copy through end-of-line, or remainder if not found */ | |||
543 | memcpy(buf, state->x.next, n); | |||
544 | state->x.have -= n; | |||
545 | state->x.next += n; | |||
546 | state->x.pos += n; | |||
547 | left -= n; | |||
548 | buf += n; | |||
549 | } while (left && eol == NULL((void *)0)); | |||
550 | ||||
551 | /* return terminated string, or if nothing, end of file */ | |||
552 | if (buf == str) | |||
553 | return NULL((void *)0); | |||
554 | buf[0] = 0; | |||
555 | return str; | |||
556 | } | |||
557 | ||||
558 | /* -- see zlib.h -- */ | |||
559 | int ZEXPORT gzdirect(gzFile file) { | |||
560 | gz_statep state; | |||
561 | ||||
562 | /* get internal structure */ | |||
563 | if (file == NULL((void *)0)) | |||
564 | return 0; | |||
565 | state = (gz_statep)file; | |||
566 | ||||
567 | /* if the state is not known, but we can find out, then do so (this is | |||
568 | mainly for right after a gzopen() or gzdopen()) */ | |||
569 | if (state->mode == GZ_READ7247 && state->how == LOOK0 && state->x.have == 0) | |||
570 | (void)gz_look(state); | |||
571 | ||||
572 | /* return 1 if transparent, 0 if processing a gzip stream */ | |||
573 | return state->direct; | |||
574 | } | |||
575 | ||||
576 | /* -- see zlib.h -- */ | |||
577 | int ZEXPORT gzclose_r(gzFile file) { | |||
578 | int ret, err; | |||
579 | gz_statep state; | |||
580 | ||||
581 | /* get internal structure */ | |||
582 | if (file == NULL((void *)0)) | |||
583 | return Z_STREAM_ERROR(-2); | |||
584 | state = (gz_statep)file; | |||
585 | ||||
586 | /* check that we're reading */ | |||
587 | if (state->mode != GZ_READ7247) | |||
588 | return Z_STREAM_ERROR(-2); | |||
589 | ||||
590 | /* free memory and close file */ | |||
591 | if (state->size) { | |||
592 | inflateEnd(&(state->strm)); | |||
593 | free(state->out); | |||
594 | free(state->in); | |||
595 | } | |||
596 | err = state->err == Z_BUF_ERROR(-5) ? Z_BUF_ERROR(-5) : Z_OK0; | |||
597 | gz_error(state, Z_OK0, NULL((void *)0)); | |||
598 | free(state->path); | |||
599 | ret = close(state->fd); | |||
600 | free(state); | |||
601 | return ret ? Z_ERRNO(-1) : err; | |||
602 | } |