2 * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <sys/queue.h>
27 #include "got_error.h"
28 #include "got_object.h"
31 #include "got_lib_inflate.h"
34 #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
37 const struct got_error *
38 got_inflate_init(struct got_inflate_buf *zb, uint8_t *outbuf, size_t bufsize)
40 const struct got_error *err = NULL;
43 memset(&zb->z, 0, sizeof(zb->z));
45 zb->z.zalloc = Z_NULL;
47 zerr = inflateInit(&zb->z);
50 return got_error_from_errno("inflateInit");
51 if (zerr == Z_MEM_ERROR) {
53 return got_error_from_errno("inflateInit");
55 return got_error(GOT_ERR_DECOMPRESSION);
58 zb->inlen = zb->outlen = bufsize;
60 zb->inbuf = calloc(1, zb->inlen);
61 if (zb->inbuf == NULL) {
62 err = got_error_from_errno("calloc");
68 zb->outbuf = calloc(1, zb->outlen);
69 if (zb->outbuf == NULL) {
70 err = got_error_from_errno("calloc");
73 zb->flags |= GOT_INFLATE_F_OWN_OUTBUF;
83 const struct got_error *
84 got_inflate_read(struct got_inflate_buf *zb, FILE *f, size_t *outlenp,
87 size_t last_total_out = zb->z.total_out;
88 size_t last_total_in = zb->z.total_in;
92 z->next_out = zb->outbuf;
93 z->avail_out = zb->outlen;
99 if (z->avail_in == 0) {
100 size_t n = fread(zb->inbuf, 1, zb->inlen, f);
103 return got_ferror(f, GOT_ERR_IO);
108 z->next_in = zb->inbuf;
111 ret = inflate(z, Z_SYNC_FLUSH);
112 } while (ret == Z_OK && z->avail_out > 0);
114 if (ret == Z_OK || ret == Z_BUF_ERROR) {
115 zb->flags |= GOT_INFLATE_F_HAVE_MORE;
117 if (ret != Z_STREAM_END)
118 return got_error(GOT_ERR_DECOMPRESSION);
119 zb->flags &= ~GOT_INFLATE_F_HAVE_MORE;
122 *outlenp = z->total_out - last_total_out;
124 *consumed += z->total_in - last_total_in;
128 const struct got_error *
129 got_inflate_read_fd(struct got_inflate_buf *zb, int fd, size_t *outlenp,
132 size_t last_total_out = zb->z.total_out;
133 size_t last_total_in = zb->z.total_in;
134 z_stream *z = &zb->z;
137 z->next_out = zb->outbuf;
138 z->avail_out = zb->outlen;
144 if (z->avail_in == 0) {
145 ssize_t n = read(fd, zb->inbuf, zb->inlen);
147 return got_error_from_errno("read");
153 z->next_in = zb->inbuf;
156 ret = inflate(z, Z_SYNC_FLUSH);
157 } while (ret == Z_OK && z->avail_out > 0);
159 if (ret == Z_OK || ret == Z_BUF_ERROR) {
160 zb->flags |= GOT_INFLATE_F_HAVE_MORE;
162 if (ret != Z_STREAM_END)
163 return got_error(GOT_ERR_DECOMPRESSION);
164 zb->flags &= ~GOT_INFLATE_F_HAVE_MORE;
167 *outlenp = z->total_out - last_total_out;
169 *consumed += z->total_in - last_total_in;
173 const struct got_error *
174 got_inflate_read_mmap(struct got_inflate_buf *zb, uint8_t *map, size_t offset,
175 size_t len, size_t *outlenp, size_t *consumed)
177 size_t last_total_out = zb->z.total_out;
178 z_stream *z = &zb->z;
181 z->next_out = zb->outbuf;
182 z->avail_out = zb->outlen;
188 size_t last_total_in = zb->z.total_in;
189 if (z->avail_in == 0) {
195 z->next_in = map + offset + *consumed;
196 z->avail_in = len - *consumed;
198 ret = inflate(z, Z_SYNC_FLUSH);
199 *consumed += z->total_in - last_total_in;
200 } while (ret == Z_OK && z->avail_out > 0);
202 if (ret == Z_OK || ret == Z_BUF_ERROR) {
203 zb->flags |= GOT_INFLATE_F_HAVE_MORE;
205 if (ret != Z_STREAM_END)
206 return got_error(GOT_ERR_DECOMPRESSION);
207 zb->flags &= ~GOT_INFLATE_F_HAVE_MORE;
210 *outlenp = z->total_out - last_total_out;
215 got_inflate_end(struct got_inflate_buf *zb)
218 if (zb->flags & GOT_INFLATE_F_OWN_OUTBUF)
223 const struct got_error *
224 got_inflate_to_mem(uint8_t **outbuf, size_t *outlen,
225 size_t *consumed_total, FILE *f)
227 const struct got_error *err;
228 size_t avail, consumed;
229 struct got_inflate_buf zb;
234 *outbuf = malloc(GOT_INFLATE_BUFSIZE);
236 return got_error_from_errno("malloc");
237 err = got_inflate_init(&zb, *outbuf, GOT_INFLATE_BUFSIZE);
239 err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE);
248 err = got_inflate_read(&zb, f, &avail, &consumed);
253 *consumed_total += consumed;
254 if (zb.flags & GOT_INFLATE_F_HAVE_MORE) {
255 zb.outlen = (nbuf * GOT_INFLATE_BUFSIZE) - *outlen;
258 newbuf = reallocarray(*outbuf, ++nbuf,
259 GOT_INFLATE_BUFSIZE);
260 if (newbuf == NULL) {
261 err = got_error_from_errno("reallocarray");
268 zb.outbuf = newbuf + *outlen;
270 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
273 got_inflate_end(&zb);
277 const struct got_error *
278 got_inflate_to_mem_fd(uint8_t **outbuf, size_t *outlen,
279 size_t *consumed_total, int infd)
281 const struct got_error *err;
282 size_t avail, consumed;
283 struct got_inflate_buf zb;
288 *outbuf = malloc(GOT_INFLATE_BUFSIZE);
290 return got_error_from_errno("malloc");
291 err = got_inflate_init(&zb, *outbuf, GOT_INFLATE_BUFSIZE);
293 err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE);
302 err = got_inflate_read_fd(&zb, infd, &avail, &consumed);
307 *consumed_total += consumed;
308 if (zb.flags & GOT_INFLATE_F_HAVE_MORE) {
309 zb.outlen = (nbuf * GOT_INFLATE_BUFSIZE) - *outlen;
312 newbuf = reallocarray(*outbuf, ++nbuf,
313 GOT_INFLATE_BUFSIZE);
314 if (newbuf == NULL) {
315 err = got_error_from_errno("reallocarray");
322 zb.outbuf = newbuf + *outlen;
324 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
327 got_inflate_end(&zb);
331 const struct got_error *
332 got_inflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen, uint8_t *map,
333 size_t offset, size_t len)
335 const struct got_error *err;
336 size_t avail, consumed;
337 struct got_inflate_buf zb;
341 *outbuf = malloc(GOT_INFLATE_BUFSIZE);
343 return got_error_from_errno("malloc");
344 err = got_inflate_init(&zb, *outbuf, GOT_INFLATE_BUFSIZE);
354 err = got_inflate_read_mmap(&zb, map, offset, len, &avail,
363 if (zb.flags & GOT_INFLATE_F_HAVE_MORE) {
364 newbuf = reallocarray(*outbuf, ++nbuf,
365 GOT_INFLATE_BUFSIZE);
366 if (newbuf == NULL) {
367 err = got_error_from_errno("reallocarray");
374 zb.outbuf = newbuf + *outlen;
375 zb.outlen = (nbuf * GOT_INFLATE_BUFSIZE) - *outlen;
377 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
379 got_inflate_end(&zb);
383 const struct got_error *
384 got_inflate_to_fd(size_t *outlen, FILE *infile, int outfd)
386 const struct got_error *err = NULL;
388 struct got_inflate_buf zb;
390 err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE);
397 err = got_inflate_read(&zb, infile, &avail, NULL);
402 n = write(outfd, zb.outbuf, avail);
404 err = got_error_from_errno("write");
409 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
413 if (lseek(outfd, SEEK_SET, 0) == -1)
414 err = got_error_from_errno("lseek");
416 got_inflate_end(&zb);
420 const struct got_error *
421 got_inflate_to_file(size_t *outlen, FILE *infile, FILE *outfile)
423 const struct got_error *err;
425 struct got_inflate_buf zb;
427 err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE);
434 err = got_inflate_read(&zb, infile, &avail, NULL);
439 n = fwrite(zb.outbuf, avail, 1, outfile);
441 err = got_ferror(outfile, GOT_ERR_IO);
446 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
451 got_inflate_end(&zb);
455 const struct got_error *
456 got_inflate_to_file_fd(size_t *outlen, int infd, FILE *outfile)
458 const struct got_error *err;
460 struct got_inflate_buf zb;
462 err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE);
469 err = got_inflate_read_fd(&zb, infd, &avail, NULL);
474 n = fwrite(zb.outbuf, avail, 1, outfile);
476 err = got_ferror(outfile, GOT_ERR_IO);
481 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
486 got_inflate_end(&zb);
490 const struct got_error *
491 got_inflate_to_file_mmap(size_t *outlen, uint8_t *map, size_t offset,
492 size_t len, FILE *outfile)
494 const struct got_error *err;
496 struct got_inflate_buf zb;
499 err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE);
506 err = got_inflate_read_mmap(&zb, map, offset, len, &avail,
514 n = fwrite(zb.outbuf, avail, 1, outfile);
516 err = got_ferror(outfile, GOT_ERR_IO);
521 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
526 got_inflate_end(&zb);