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)
86 size_t last_total_out = zb->z.total_out;
90 z->next_out = zb->outbuf;
91 z->avail_out = zb->outlen;
95 if (z->avail_in == 0) {
96 size_t n = fread(zb->inbuf, 1, zb->inlen, f);
99 return got_ferror(f, GOT_ERR_IO);
104 z->next_in = zb->inbuf;
107 ret = inflate(z, Z_SYNC_FLUSH);
108 } while (ret == Z_OK && z->avail_out > 0);
110 if (ret == Z_OK || ret == Z_BUF_ERROR) {
111 zb->flags |= GOT_INFLATE_F_HAVE_MORE;
113 if (ret != Z_STREAM_END)
114 return got_error(GOT_ERR_DECOMPRESSION);
115 zb->flags &= ~GOT_INFLATE_F_HAVE_MORE;
118 *outlenp = z->total_out - last_total_out;
122 const struct got_error *
123 got_inflate_read_fd(struct got_inflate_buf *zb, int fd, size_t *outlenp)
125 size_t last_total_out = zb->z.total_out;
126 z_stream *z = &zb->z;
129 z->next_out = zb->outbuf;
130 z->avail_out = zb->outlen;
134 if (z->avail_in == 0) {
135 ssize_t n = read(fd, zb->inbuf, zb->inlen);
137 return got_error_from_errno("read");
143 z->next_in = zb->inbuf;
146 ret = inflate(z, Z_SYNC_FLUSH);
147 } while (ret == Z_OK && z->avail_out > 0);
149 if (ret == Z_OK || ret == Z_BUF_ERROR) {
150 zb->flags |= GOT_INFLATE_F_HAVE_MORE;
152 if (ret != Z_STREAM_END)
153 return got_error(GOT_ERR_DECOMPRESSION);
154 zb->flags &= ~GOT_INFLATE_F_HAVE_MORE;
157 *outlenp = z->total_out - last_total_out;
161 const struct got_error *
162 got_inflate_read_mmap(struct got_inflate_buf *zb, uint8_t *map, size_t offset,
163 size_t len, size_t *outlenp, size_t *consumed)
165 size_t last_total_out = zb->z.total_out;
166 z_stream *z = &zb->z;
169 z->next_out = zb->outbuf;
170 z->avail_out = zb->outlen;
176 size_t last_total_in = zb->z.total_in;
177 if (z->avail_in == 0) {
183 z->next_in = map + offset + *consumed;
184 z->avail_in = len - *consumed;
186 ret = inflate(z, Z_SYNC_FLUSH);
187 *consumed += z->total_in - last_total_in;
188 } while (ret == Z_OK && z->avail_out > 0);
190 if (ret == Z_OK || ret == Z_BUF_ERROR) {
191 zb->flags |= GOT_INFLATE_F_HAVE_MORE;
193 if (ret != Z_STREAM_END)
194 return got_error(GOT_ERR_DECOMPRESSION);
195 zb->flags &= ~GOT_INFLATE_F_HAVE_MORE;
198 *outlenp = z->total_out - last_total_out;
203 got_inflate_end(struct got_inflate_buf *zb)
206 if (zb->flags & GOT_INFLATE_F_OWN_OUTBUF)
211 const struct got_error *
212 got_inflate_to_mem(uint8_t **outbuf, size_t *outlen, FILE *f)
214 const struct got_error *err;
216 struct got_inflate_buf zb;
220 *outbuf = malloc(GOT_INFLATE_BUFSIZE);
222 return got_error_from_errno("malloc");
223 err = got_inflate_init(&zb, *outbuf, GOT_INFLATE_BUFSIZE);
230 err = got_inflate_read(&zb, f, &avail);
234 if (zb.flags & GOT_INFLATE_F_HAVE_MORE) {
235 newbuf = reallocarray(*outbuf, ++nbuf,
236 GOT_INFLATE_BUFSIZE);
237 if (newbuf == NULL) {
238 err = got_error_from_errno("reallocarray");
245 zb.outbuf = newbuf + *outlen;
246 zb.outlen = (nbuf * GOT_INFLATE_BUFSIZE) - *outlen;
248 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
251 got_inflate_end(&zb);
255 const struct got_error *
256 got_inflate_to_mem_fd(uint8_t **outbuf, size_t *outlen, int infd)
258 const struct got_error *err;
260 struct got_inflate_buf zb;
264 *outbuf = malloc(GOT_INFLATE_BUFSIZE);
266 return got_error_from_errno("malloc");
267 err = got_inflate_init(&zb, *outbuf, GOT_INFLATE_BUFSIZE);
274 err = got_inflate_read_fd(&zb, infd, &avail);
278 if (zb.flags & GOT_INFLATE_F_HAVE_MORE) {
279 newbuf = reallocarray(*outbuf, ++nbuf,
280 GOT_INFLATE_BUFSIZE);
281 if (newbuf == NULL) {
282 err = got_error_from_errno("reallocarray");
289 zb.outbuf = newbuf + *outlen;
290 zb.outlen = (nbuf * GOT_INFLATE_BUFSIZE) - *outlen;
292 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
295 got_inflate_end(&zb);
299 const struct got_error *
300 got_inflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen, uint8_t *map,
301 size_t offset, size_t len)
303 const struct got_error *err;
304 size_t avail, consumed;
305 struct got_inflate_buf zb;
309 *outbuf = malloc(GOT_INFLATE_BUFSIZE);
311 return got_error_from_errno("malloc");
312 err = got_inflate_init(&zb, *outbuf, GOT_INFLATE_BUFSIZE);
322 err = got_inflate_read_mmap(&zb, map, offset, len, &avail,
331 if (zb.flags & GOT_INFLATE_F_HAVE_MORE) {
332 newbuf = reallocarray(*outbuf, ++nbuf,
333 GOT_INFLATE_BUFSIZE);
334 if (newbuf == NULL) {
335 err = got_error_from_errno("reallocarray");
342 zb.outbuf = newbuf + *outlen;
343 zb.outlen = (nbuf * GOT_INFLATE_BUFSIZE) - *outlen;
345 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
347 got_inflate_end(&zb);
351 const struct got_error *
352 got_inflate_to_fd(size_t *outlen, FILE *infile, int outfd)
354 const struct got_error *err = NULL;
356 struct got_inflate_buf zb;
358 err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE);
365 err = got_inflate_read(&zb, infile, &avail);
370 n = write(outfd, zb.outbuf, avail);
372 err = got_error_from_errno("write");
377 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
381 if (lseek(outfd, SEEK_SET, 0) == -1)
382 err = got_error_from_errno("lseek");
384 got_inflate_end(&zb);
388 const struct got_error *
389 got_inflate_to_file(size_t *outlen, FILE *infile, FILE *outfile)
391 const struct got_error *err;
393 struct got_inflate_buf zb;
395 err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE);
402 err = got_inflate_read(&zb, infile, &avail);
407 n = fwrite(zb.outbuf, avail, 1, outfile);
409 err = got_ferror(outfile, GOT_ERR_IO);
414 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
419 got_inflate_end(&zb);
423 const struct got_error *
424 got_inflate_to_file_fd(size_t *outlen, int infd, FILE *outfile)
426 const struct got_error *err;
428 struct got_inflate_buf zb;
430 err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE);
437 err = got_inflate_read_fd(&zb, infd, &avail);
442 n = fwrite(zb.outbuf, avail, 1, outfile);
444 err = got_ferror(outfile, GOT_ERR_IO);
449 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
454 got_inflate_end(&zb);
458 const struct got_error *
459 got_inflate_to_file_mmap(size_t *outlen, uint8_t *map, size_t offset,
460 size_t len, FILE *outfile)
462 const struct got_error *err;
464 struct got_inflate_buf zb;
467 err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE);
474 err = got_inflate_read_mmap(&zb, map, offset, len, &avail,
482 n = fwrite(zb.outbuf, avail, 1, outfile);
484 err = got_ferror(outfile, GOT_ERR_IO);
489 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
494 got_inflate_end(&zb);