| 1 | /* gzread.c -- zlib functions for reading gzip files |
| 2 | * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler |
| 3 | * For conditions of distribution and use, see copyright notice in zlib.h |
| 4 | */ |
| 5 | |
| 6 | #include "gzguts.h" |
| 7 | |
| 8 | /* Local functions */ |
| 9 | local int gz_load OF((gz_statep, unsigned char *, unsigned, unsigned *)); |
| 10 | local int gz_avail OF((gz_statep)); |
| 11 | local int gz_look OF((gz_statep)); |
| 12 | local int gz_decomp OF((gz_statep)); |
| 13 | local int gz_fetch OF((gz_statep)); |
| 14 | local int gz_skip OF((gz_statep, z_off64_t)); |
| 15 | |
| 16 | int ZEXPORT gzgetc_(gzFile file); |
| 17 | |
| 18 | /* Use read() to load a buffer -- return -1 on error, otherwise 0. Read from |
| 19 | state->fd, and update state->eof, state->err, and state->msg as appropriate. |
| 20 | This function needs to loop on read(), since read() is not guaranteed to |
| 21 | read the number of bytes requested, depending on the type of descriptor. */ |
| 22 | local int gz_load(gz_statep state, unsigned char *buf, unsigned len, unsigned *have) |
| 23 | { |
| 24 | int ret; |
| 25 | |
| 26 | *have = 0; |
| 27 | do { |
| 28 | ret = read(state->fd, buf + *have, len - *have); |
| 29 | if (ret <= 0) |
| 30 | break; |
| 31 | *have += ret; |
| 32 | } while (*have < len); |
| 33 | if (ret < 0) { |
| 34 | gz_error(state, Z_ERRNO, zstrerror()); |
| 35 | return -1; |
| 36 | } |
| 37 | if (ret == 0) |
| 38 | state->eof = 1; |
| 39 | return 0; |
| 40 | } |
| 41 | |
| 42 | /* Load up input buffer and set eof flag if last data loaded -- return -1 on |
| 43 | error, 0 otherwise. Note that the eof flag is set when the end of the input |
| 44 | file is reached, even though there may be unused data in the buffer. Once |
| 45 | that data has been used, no more attempts will be made to read the file. |
| 46 | If strm->avail_in != 0, then the current data is moved to the beginning of |
| 47 | the input buffer, and then the remainder of the buffer is loaded with the |
| 48 | available data from the input file. */ |
| 49 | local int gz_avail(gz_statep state) |
| 50 | { |
| 51 | unsigned got; |
| 52 | z_streamp strm = &(state->strm); |
| 53 | |
| 54 | if (state->err != Z_OK && state->err != Z_BUF_ERROR) |
| 55 | return -1; |
| 56 | if (state->eof == 0) { |
| 57 | if (strm->avail_in) { /* copy what's there to the start */ |
| 58 | unsigned char *p = state->in; |
| 59 | unsigned const char *q = strm->next_in; |
| 60 | unsigned n = strm->avail_in; |
| 61 | do { |
| 62 | *p++ = *q++; |
| 63 | } while (--n); |
| 64 | } |
| 65 | if (gz_load(state, state->in + strm->avail_in, |
| 66 | state->size - strm->avail_in, &got) == -1) |
| 67 | return -1; |
| 68 | strm->avail_in += got; |
| 69 | strm->next_in = state->in; |
| 70 | } |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | /* Look for gzip header, set up for inflate or copy. state->x.have must be 0. |
| 75 | If this is the first time in, allocate required memory. state->how will be |
| 76 | left unchanged if there is no more input data available, will be set to COPY |
| 77 | if there is no gzip header and direct copying will be performed, or it will |
| 78 | be set to GZIP for decompression. If direct copying, then leftover input |
| 79 | data from the input buffer will be copied to the output buffer. In that |
| 80 | case, all further file reads will be directly to either the output buffer or |
| 81 | a user buffer. If decompressing, the inflate state will be initialized. |
| 82 | gz_look() will return 0 on success or -1 on failure. */ |
| 83 | local int gz_look(gz_statep state) |
| 84 | { |
| 85 | z_streamp strm = &(state->strm); |
| 86 | |
| 87 | /* allocate read buffers and inflate memory */ |
| 88 | if (state->size == 0) { |
| 89 | /* allocate buffers */ |
| 90 | state->in = (unsigned char *)malloc(state->want); |
| 91 | state->out = (unsigned char *)malloc(state->want << 1); |
| 92 | if (state->in == NULL || state->out == NULL) { |
| 93 | if (state->out != NULL) |
| 94 | free(state->out); |
| 95 | if (state->in != NULL) |
| 96 | free(state->in); |
| 97 | gz_error(state, Z_MEM_ERROR, "out of memory"); |
| 98 | return -1; |
| 99 | } |
| 100 | state->size = state->want; |
| 101 | |
| 102 | /* allocate inflate memory */ |
| 103 | state->strm.zalloc = Z_NULL; |
| 104 | state->strm.zfree = Z_NULL; |
| 105 | state->strm.opaque = Z_NULL; |
| 106 | state->strm.avail_in = 0; |
| 107 | state->strm.next_in = Z_NULL; |
| 108 | if (inflateInit2(&(state->strm), 15 + 16) != Z_OK) { /* gunzip */ |
| 109 | free(state->out); |
| 110 | free(state->in); |
| 111 | state->size = 0; |
| 112 | gz_error(state, Z_MEM_ERROR, "out of memory"); |
| 113 | return -1; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | /* get at least the magic bytes in the input buffer */ |
| 118 | if (strm->avail_in < 2) { |
| 119 | if (gz_avail(state) == -1) |
| 120 | return -1; |
| 121 | if (strm->avail_in == 0) |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | /* look for gzip magic bytes -- if there, do gzip decoding (note: there is |
| 126 | a logical dilemma here when considering the case of a partially written |
| 127 | gzip file, to wit, if a single 31 byte is written, then we cannot tell |
| 128 | whether this is a single-byte file, or just a partially written gzip |
| 129 | file -- for here we assume that if a gzip file is being written, then |
| 130 | the header will be written in a single operation, so that reading a |
| 131 | single byte is sufficient indication that it is not a gzip file) */ |
| 132 | if (strm->avail_in > 1 && |
| 133 | strm->next_in[0] == 31 && strm->next_in[1] == 139) { |
| 134 | inflateReset(strm); |
| 135 | state->how = MODE_GZIP; |
| 136 | state->direct = 0; |
| 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | /* no gzip header -- if we were decoding gzip before, then this is trailing |
| 141 | garbage. Ignore the trailing garbage and finish. */ |
| 142 | if (state->direct == 0) { |
| 143 | strm->avail_in = 0; |
| 144 | state->eof = 1; |
| 145 | state->x.have = 0; |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | /* doing raw i/o, copy any leftover input to output -- this assumes that |
| 150 | the output buffer is larger than the input buffer, which also assures |
| 151 | space for gzungetc() */ |
| 152 | state->x.next = state->out; |
| 153 | if (strm->avail_in) { |
| 154 | memcpy(state->x.next, strm->next_in, strm->avail_in); |
| 155 | state->x.have = strm->avail_in; |
| 156 | strm->avail_in = 0; |
| 157 | } |
| 158 | state->how = MODE_COPY; |
| 159 | state->direct = 1; |
| 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | /* Decompress from input to the provided next_out and avail_out in the state. |
| 164 | On return, state->x.have and state->x.next point to the just decompressed |
| 165 | data. If the gzip stream completes, state->how is reset to LOOK to look for |
| 166 | the next gzip stream or raw data, once state->x.have is depleted. Returns 0 |
| 167 | on success, -1 on failure. */ |
| 168 | local int gz_decomp(gz_statep state) |
| 169 | { |
| 170 | int ret = Z_OK; |
| 171 | unsigned had; |
| 172 | z_streamp strm = &(state->strm); |
| 173 | |
| 174 | /* fill output buffer up to end of deflate stream */ |
| 175 | had = strm->avail_out; |
| 176 | do { |
| 177 | /* get more input for inflate() */ |
| 178 | if (strm->avail_in == 0 && gz_avail(state) == -1) |
| 179 | return -1; |
| 180 | if (strm->avail_in == 0) { |
| 181 | gz_error(state, Z_BUF_ERROR, "unexpected end of file"); |
| 182 | break; |
| 183 | } |
| 184 | |
| 185 | /* decompress and handle errors */ |
| 186 | ret = inflate(strm, Z_NO_FLUSH); |
| 187 | if (ret == Z_STREAM_ERROR || ret == Z_NEED_DICT) { |
| 188 | gz_error(state, Z_STREAM_ERROR, |
| 189 | "internal error: inflate stream corrupt"); |
| 190 | return -1; |
| 191 | } |
| 192 | if (ret == Z_MEM_ERROR) { |
| 193 | gz_error(state, Z_MEM_ERROR, "out of memory"); |
| 194 | return -1; |
| 195 | } |
| 196 | if (ret == Z_DATA_ERROR) { /* deflate stream invalid */ |
| 197 | gz_error(state, Z_DATA_ERROR, |
| 198 | strm->msg == NULL ? "compressed data error" : strm->msg); |
| 199 | return -1; |
| 200 | } |
| 201 | } while (strm->avail_out && ret != Z_STREAM_END); |
| 202 | |
| 203 | /* update available output */ |
| 204 | state->x.have = had - strm->avail_out; |
| 205 | state->x.next = strm->next_out - state->x.have; |
| 206 | |
| 207 | /* if the gzip stream completed successfully, look for another */ |
| 208 | if (ret == Z_STREAM_END) |
| 209 | state->how = LOOK; |
| 210 | |
| 211 | /* good decompression */ |
| 212 | return 0; |
| 213 | } |
| 214 | |
| 215 | /* Fetch data and put it in the output buffer. Assumes state->x.have is 0. |
| 216 | Data is either copied from the input file or decompressed from the input |
| 217 | file depending on state->how. If state->how is LOOK, then a gzip header is |
| 218 | looked for to determine whether to copy or decompress. Returns -1 on error, |
| 219 | otherwise 0. gz_fetch() will leave state->how as COPY or GZIP unless the |
| 220 | end of the input file has been reached and all data has been processed. */ |
| 221 | local int gz_fetch(gz_statep state) |
| 222 | { |
| 223 | z_streamp strm = &(state->strm); |
| 224 | |
| 225 | do { |
| 226 | switch(state->how) { |
| 227 | case LOOK: /* -> LOOK, MODE_COPY (only if never GZIP), or MODE_GZIP */ |
| 228 | if (gz_look(state) == -1) |
| 229 | return -1; |
| 230 | if (state->how == LOOK) |
| 231 | return 0; |
| 232 | break; |
| 233 | case MODE_COPY: /* -> MODE_COPY */ |
| 234 | if (gz_load(state, state->out, state->size << 1, &(state->x.have)) |
| 235 | == -1) |
| 236 | return -1; |
| 237 | state->x.next = state->out; |
| 238 | return 0; |
| 239 | case MODE_GZIP: /* -> GZIP or LOOK (if end of gzip stream) */ |
| 240 | strm->avail_out = state->size << 1; |
| 241 | strm->next_out = state->out; |
| 242 | if (gz_decomp(state) == -1) |
| 243 | return -1; |
| 244 | } |
| 245 | } while (state->x.have == 0 && (!state->eof || strm->avail_in)); |
| 246 | return 0; |
| 247 | } |
| 248 | |
| 249 | /* Skip len uncompressed bytes of output. Return -1 on error, 0 on success. */ |
| 250 | local int gz_skip(gz_statep state, z_off64_t len) |
| 251 | { |
| 252 | unsigned n; |
| 253 | |
| 254 | /* skip over len bytes or reach end-of-file, whichever comes first */ |
| 255 | while (len) |
| 256 | /* skip over whatever is in output buffer */ |
| 257 | if (state->x.have) { |
| 258 | n = GT_OFF(state->x.have) || (z_off64_t)state->x.have > len ? |
| 259 | (unsigned)len : state->x.have; |
| 260 | state->x.have -= n; |
| 261 | state->x.next += n; |
| 262 | state->x.pos += n; |
| 263 | len -= n; |
| 264 | } |
| 265 | |
| 266 | /* output buffer empty -- return if we're at the end of the input */ |
| 267 | else if (state->eof && state->strm.avail_in == 0) |
| 268 | break; |
| 269 | |
| 270 | /* need more data to skip -- load up output buffer */ |
| 271 | else { |
| 272 | /* get more output, looking for header if required */ |
| 273 | if (gz_fetch(state) == -1) |
| 274 | return -1; |
| 275 | } |
| 276 | return 0; |
| 277 | } |
| 278 | |
| 279 | /* -- see zlib.h -- */ |
| 280 | int ZEXPORT gzread(gzFile file, voidp buf, unsigned len) |
| 281 | { |
| 282 | unsigned got, n; |
| 283 | gz_statep state; |
| 284 | z_streamp strm; |
| 285 | |
| 286 | /* get internal structure */ |
| 287 | if (file == NULL) |
| 288 | return -1; |
| 289 | state = (gz_statep)file; |
| 290 | strm = &(state->strm); |
| 291 | |
| 292 | /* check that we're reading and that there's no (serious) error */ |
| 293 | if (state->mode != GZ_READ || |
| 294 | (state->err != Z_OK && state->err != Z_BUF_ERROR)) |
| 295 | return -1; |
| 296 | |
| 297 | /* since an int is returned, make sure len fits in one, otherwise return |
| 298 | with an error (this avoids the flaw in the interface) */ |
| 299 | if ((int)len < 0) { |
| 300 | gz_error(state, Z_DATA_ERROR, "requested length does not fit in int"); |
| 301 | return -1; |
| 302 | } |
| 303 | |
| 304 | /* if len is zero, avoid unnecessary operations */ |
| 305 | if (len == 0) |
| 306 | return 0; |
| 307 | |
| 308 | /* process a skip request */ |
| 309 | if (state->seek) { |
| 310 | state->seek = 0; |
| 311 | if (gz_skip(state, state->skip) == -1) |
| 312 | return -1; |
| 313 | } |
| 314 | |
| 315 | /* get len bytes to buf, or less than len if at the end */ |
| 316 | got = 0; |
| 317 | n = 0; |
| 318 | do { |
| 319 | /* first just try copying data from the output buffer */ |
| 320 | if (state->x.have) { |
| 321 | n = state->x.have > len ? len : state->x.have; |
| 322 | memcpy(buf, state->x.next, n); |
| 323 | state->x.next += n; |
| 324 | state->x.have -= n; |
| 325 | } |
| 326 | |
| 327 | /* output buffer empty -- return if we're at the end of the input */ |
| 328 | else if (state->eof && strm->avail_in == 0) { |
| 329 | state->past = 1; /* tried to read past end */ |
| 330 | break; |
| 331 | } |
| 332 | |
| 333 | /* need output data -- for small len or new stream load up our output |
| 334 | buffer */ |
| 335 | else if (state->how == LOOK || len < (state->size << 1)) { |
| 336 | /* get more output, looking for header if required */ |
| 337 | if (gz_fetch(state) == -1) |
| 338 | return -1; |
| 339 | continue; /* no progress yet -- go back to copy above */ |
| 340 | /* the copy above assures that we will leave with space in the |
| 341 | output buffer, allowing at least one gzungetc() to succeed */ |
| 342 | } |
| 343 | |
| 344 | /* large len -- read directly into user buffer */ |
| 345 | else if (state->how == MODE_COPY) { /* read directly */ |
| 346 | if (gz_load(state, (unsigned char *)buf, len, &n) == -1) |
| 347 | return -1; |
| 348 | } |
| 349 | |
| 350 | /* large len -- decompress directly into user buffer */ |
| 351 | else { /* state->how == GZIP */ |
| 352 | strm->avail_out = len; |
| 353 | strm->next_out = (unsigned char *)buf; |
| 354 | if (gz_decomp(state) == -1) |
| 355 | return -1; |
| 356 | n = state->x.have; |
| 357 | state->x.have = 0; |
| 358 | } |
| 359 | |
| 360 | /* update progress */ |
| 361 | len -= n; |
| 362 | buf = (char *)buf + n; |
| 363 | got += n; |
| 364 | state->x.pos += n; |
| 365 | } while (len); |
| 366 | |
| 367 | /* return number of bytes read into user buffer (will fit in int) */ |
| 368 | return (int)got; |
| 369 | } |
| 370 | |
| 371 | /* -- see zlib.h -- */ |
| 372 | #ifdef Z_PREFIX_SET |
| 373 | # undef z_gzgetc |
| 374 | #else |
| 375 | # undef gzgetc |
| 376 | #endif |
| 377 | int ZEXPORT gzgetc(gzFile file) |
| 378 | { |
| 379 | int ret; |
| 380 | unsigned char buf[1]; |
| 381 | gz_statep state; |
| 382 | |
| 383 | /* get internal structure */ |
| 384 | if (file == NULL) |
| 385 | return -1; |
| 386 | state = (gz_statep)file; |
| 387 | |
| 388 | /* check that we're reading and that there's no (serious) error */ |
| 389 | if (state->mode != GZ_READ || |
| 390 | (state->err != Z_OK && state->err != Z_BUF_ERROR)) |
| 391 | return -1; |
| 392 | |
| 393 | /* try output buffer (no need to check for skip request) */ |
| 394 | if (state->x.have) { |
| 395 | state->x.have--; |
| 396 | state->x.pos++; |
| 397 | return *(state->x.next)++; |
| 398 | } |
| 399 | |
| 400 | /* nothing there -- try gzread() */ |
| 401 | ret = gzread(file, buf, 1); |
| 402 | return ret < 1 ? -1 : buf[0]; |
| 403 | } |
| 404 | |
| 405 | int ZEXPORT gzgetc_(gzFile file) |
| 406 | { |
| 407 | return gzgetc(file); |
| 408 | } |
| 409 | |
| 410 | /* -- see zlib.h -- */ |
| 411 | int ZEXPORT gzungetc(int c, gzFile file) |
| 412 | { |
| 413 | gz_statep state; |
| 414 | |
| 415 | /* get internal structure */ |
| 416 | if (file == NULL) |
| 417 | return -1; |
| 418 | state = (gz_statep)file; |
| 419 | |
| 420 | /* check that we're reading and that there's no (serious) error */ |
| 421 | if (state->mode != GZ_READ || |
| 422 | (state->err != Z_OK && state->err != Z_BUF_ERROR)) |
| 423 | return -1; |
| 424 | |
| 425 | /* process a skip request */ |
| 426 | if (state->seek) { |
| 427 | state->seek = 0; |
| 428 | if (gz_skip(state, state->skip) == -1) |
| 429 | return -1; |
| 430 | } |
| 431 | |
| 432 | /* can't push EOF */ |
| 433 | if (c < 0) |
| 434 | return -1; |
| 435 | |
| 436 | /* if output buffer empty, put byte at end (allows more pushing) */ |
| 437 | if (state->x.have == 0) { |
| 438 | state->x.have = 1; |
| 439 | state->x.next = state->out + (state->size << 1) - 1; |
| 440 | state->x.next[0] = c; |
| 441 | state->x.pos--; |
| 442 | state->past = 0; |
| 443 | return c; |
| 444 | } |
| 445 | |
| 446 | /* if no room, give up (must have already done a gzungetc()) */ |
| 447 | if (state->x.have == (state->size << 1)) { |
| 448 | gz_error(state, Z_DATA_ERROR, "out of room to push characters"); |
| 449 | return -1; |
| 450 | } |
| 451 | |
| 452 | /* slide output data if needed and insert byte before existing data */ |
| 453 | if (state->x.next == state->out) { |
| 454 | unsigned char *src = state->out + state->x.have; |
| 455 | unsigned char *dest = state->out + (state->size << 1); |
| 456 | while (src > state->out) |
| 457 | *--dest = *--src; |
| 458 | state->x.next = dest; |
| 459 | } |
| 460 | state->x.have++; |
| 461 | state->x.next--; |
| 462 | state->x.next[0] = c; |
| 463 | state->x.pos--; |
| 464 | state->past = 0; |
| 465 | return c; |
| 466 | } |
| 467 | |
| 468 | /* -- see zlib.h -- */ |
| 469 | char * ZEXPORT gzgets(gzFile file, char *buf, int len) |
| 470 | { |
| 471 | unsigned left, n; |
| 472 | char *str; |
| 473 | unsigned char *eol; |
| 474 | gz_statep state; |
| 475 | |
| 476 | /* check parameters and get internal structure */ |
| 477 | if (file == NULL || buf == NULL || len < 1) |
| 478 | return NULL; |
| 479 | state = (gz_statep)file; |
| 480 | |
| 481 | /* check that we're reading and that there's no (serious) error */ |
| 482 | if (state->mode != GZ_READ || |
| 483 | (state->err != Z_OK && state->err != Z_BUF_ERROR)) |
| 484 | return NULL; |
| 485 | |
| 486 | /* process a skip request */ |
| 487 | if (state->seek) { |
| 488 | state->seek = 0; |
| 489 | if (gz_skip(state, state->skip) == -1) |
| 490 | return NULL; |
| 491 | } |
| 492 | |
| 493 | /* copy output bytes up to new line or len - 1, whichever comes first -- |
| 494 | append a terminating zero to the string (we don't check for a zero in |
| 495 | the contents, let the user worry about that) */ |
| 496 | str = buf; |
| 497 | left = (unsigned)len - 1; |
| 498 | if (left) do { |
| 499 | /* assure that something is in the output buffer */ |
| 500 | if (state->x.have == 0 && gz_fetch(state) == -1) |
| 501 | return NULL; /* error */ |
| 502 | if (state->x.have == 0) { /* end of file */ |
| 503 | state->past = 1; /* read past end */ |
| 504 | break; /* return what we have */ |
| 505 | } |
| 506 | |
| 507 | /* look for end-of-line in current output buffer */ |
| 508 | n = state->x.have > left ? left : state->x.have; |
| 509 | eol = (unsigned char *)memchr(state->x.next, '\n', n); |
| 510 | if (eol != NULL) |
| 511 | n = (unsigned)(eol - state->x.next) + 1; |
| 512 | |
| 513 | /* copy through end-of-line, or remainder if not found */ |
| 514 | memcpy(buf, state->x.next, n); |
| 515 | state->x.have -= n; |
| 516 | state->x.next += n; |
| 517 | state->x.pos += n; |
| 518 | left -= n; |
| 519 | buf += n; |
| 520 | } while (left && eol == NULL); |
| 521 | |
| 522 | /* return terminated string, or if nothing, end of file */ |
| 523 | if (buf == str) |
| 524 | return NULL; |
| 525 | buf[0] = 0; |
| 526 | return str; |
| 527 | } |
| 528 | |
| 529 | /* -- see zlib.h -- */ |
| 530 | int ZEXPORT gzdirect(gzFile file) |
| 531 | { |
| 532 | gz_statep state; |
| 533 | |
| 534 | /* get internal structure */ |
| 535 | if (file == NULL) |
| 536 | return 0; |
| 537 | state = (gz_statep)file; |
| 538 | |
| 539 | /* if the state is not known, but we can find out, then do so (this is |
| 540 | mainly for right after a gzopen() or gzdopen()) */ |
| 541 | if (state->mode == GZ_READ && state->how == LOOK && state->x.have == 0) |
| 542 | (void)gz_look(state); |
| 543 | |
| 544 | /* return 1 if transparent, 0 if processing a gzip stream */ |
| 545 | return state->direct; |
| 546 | } |
| 547 | |
| 548 | /* -- see zlib.h -- */ |
| 549 | int gzclose_r(gzFile file) |
| 550 | { |
| 551 | int ret, err; |
| 552 | gz_statep state; |
| 553 | |
| 554 | /* get internal structure */ |
| 555 | if (file == NULL) |
| 556 | return Z_STREAM_ERROR; |
| 557 | state = (gz_statep)file; |
| 558 | |
| 559 | /* check that we're reading */ |
| 560 | if (state->mode != GZ_READ) |
| 561 | return Z_STREAM_ERROR; |
| 562 | |
| 563 | /* free memory and close file */ |
| 564 | if (state->size) { |
| 565 | inflateEnd(&(state->strm)); |
| 566 | free(state->out); |
| 567 | free(state->in); |
| 568 | } |
| 569 | err = state->err == Z_BUF_ERROR ? Z_BUF_ERROR : Z_OK; |
| 570 | gz_error(state, Z_OK, NULL); |
| 571 | free(state->path); |
| 572 | ret = close(state->fd); |
| 573 | free(state); |
| 574 | return ret ? Z_ERRNO : err; |
| 575 | } |