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);
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);
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 = MIN(zb->inlen, len);
187 ret = inflate(z, Z_SYNC_FLUSH);
188 *consumed += z->total_in - last_total_in;
189 } while (ret == Z_OK && z->avail_out > 0);
192 zb->flags |= GOT_INFLATE_F_HAVE_MORE;
194 if (ret != Z_STREAM_END)
195 return got_error(GOT_ERR_DECOMPRESSION);
196 zb->flags &= ~GOT_INFLATE_F_HAVE_MORE;
199 *outlenp = z->total_out - last_total_out;
204 got_inflate_end(struct got_inflate_buf *zb)
207 if (zb->flags & GOT_INFLATE_F_OWN_OUTBUF)
212 const struct got_error *
213 got_inflate_to_mem(uint8_t **outbuf, size_t *outlen, FILE *f)
215 const struct got_error *err;
217 struct got_inflate_buf zb;
221 *outbuf = malloc(GOT_INFLATE_BUFSIZE);
223 return got_error_from_errno("malloc");
224 err = got_inflate_init(&zb, *outbuf, GOT_INFLATE_BUFSIZE);
231 err = got_inflate_read(&zb, f, &avail);
235 if (zb.flags & GOT_INFLATE_F_HAVE_MORE) {
236 newbuf = reallocarray(*outbuf, ++nbuf,
237 GOT_INFLATE_BUFSIZE);
238 if (newbuf == NULL) {
239 err = got_error_from_errno("reallocarray");
246 zb.outbuf = newbuf + *outlen;
247 zb.outlen = (nbuf * GOT_INFLATE_BUFSIZE) - *outlen;
249 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
252 got_inflate_end(&zb);
256 const struct got_error *
257 got_inflate_to_mem_fd(uint8_t **outbuf, size_t *outlen, int infd)
259 const struct got_error *err;
261 struct got_inflate_buf zb;
265 *outbuf = malloc(GOT_INFLATE_BUFSIZE);
267 return got_error_from_errno("malloc");
268 err = got_inflate_init(&zb, *outbuf, GOT_INFLATE_BUFSIZE);
275 err = got_inflate_read_fd(&zb, infd, &avail);
279 if (zb.flags & GOT_INFLATE_F_HAVE_MORE) {
280 newbuf = reallocarray(*outbuf, ++nbuf,
281 GOT_INFLATE_BUFSIZE);
282 if (newbuf == NULL) {
283 err = got_error_from_errno("reallocarray");
290 zb.outbuf = newbuf + *outlen;
291 zb.outlen = (nbuf * GOT_INFLATE_BUFSIZE) - *outlen;
293 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
296 got_inflate_end(&zb);
300 const struct got_error *
301 got_inflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen, uint8_t *map,
302 size_t offset, size_t len)
304 const struct got_error *err;
305 size_t avail, consumed;
306 struct got_inflate_buf zb;
310 *outbuf = malloc(GOT_INFLATE_BUFSIZE);
312 return got_error_from_errno("malloc");
313 err = got_inflate_init(&zb, *outbuf, GOT_INFLATE_BUFSIZE);
323 err = got_inflate_read_mmap(&zb, map, offset, len, &avail,
332 if (zb.flags & GOT_INFLATE_F_HAVE_MORE) {
333 newbuf = reallocarray(*outbuf, ++nbuf,
334 GOT_INFLATE_BUFSIZE);
335 if (newbuf == NULL) {
336 err = got_error_from_errno("reallocarray");
343 zb.outbuf = newbuf + *outlen;
344 zb.outlen = (nbuf * GOT_INFLATE_BUFSIZE) - *outlen;
346 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
348 got_inflate_end(&zb);
352 const struct got_error *
353 got_inflate_to_fd(size_t *outlen, FILE *infile, int outfd)
355 const struct got_error *err = NULL;
357 struct got_inflate_buf zb;
359 err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE);
366 err = got_inflate_read(&zb, infile, &avail);
371 n = write(outfd, zb.outbuf, avail);
373 err = got_error_from_errno("write");
378 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
382 if (lseek(outfd, SEEK_SET, 0) == -1)
383 err = got_error_from_errno("lseek");
385 got_inflate_end(&zb);
389 const struct got_error *
390 got_inflate_to_file(size_t *outlen, FILE *infile, FILE *outfile)
392 const struct got_error *err;
394 struct got_inflate_buf zb;
396 err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE);
403 err = got_inflate_read(&zb, infile, &avail);
408 n = fwrite(zb.outbuf, avail, 1, outfile);
410 err = got_ferror(outfile, GOT_ERR_IO);
415 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
420 got_inflate_end(&zb);
424 const struct got_error *
425 got_inflate_to_file_fd(size_t *outlen, int infd, FILE *outfile)
427 const struct got_error *err;
429 struct got_inflate_buf zb;
431 err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE);
438 err = got_inflate_read_fd(&zb, infd, &avail);
443 n = fwrite(zb.outbuf, avail, 1, outfile);
445 err = got_ferror(outfile, GOT_ERR_IO);
450 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
455 got_inflate_end(&zb);
459 const struct got_error *
460 got_inflate_to_file_mmap(size_t *outlen, uint8_t *map, size_t offset,
461 size_t len, FILE *outfile)
463 const struct got_error *err;
465 struct got_inflate_buf zb;
468 err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE);
475 err = got_inflate_read_mmap(&zb, map, offset, len, &avail,
483 n = fwrite(zb.outbuf, avail, 1, outfile);
485 err = got_ferror(outfile, GOT_ERR_IO);
490 } while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
495 got_inflate_end(&zb);