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>
26 #include "got_error.h"
27 #include "got_object.h"
29 #include "got_lib_path.h"
30 #include "got_lib_inflate.h"
33 #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
36 const struct got_error *
37 got_inflate_init(struct got_zstream_buf *zb, uint8_t *outbuf, size_t bufsize)
39 const struct got_error *err = NULL;
41 memset(&zb->z, 0, sizeof(zb->z));
43 zb->z.zalloc = Z_NULL;
45 if (inflateInit(&zb->z) != Z_OK) {
46 err = got_error(GOT_ERR_IO);
50 zb->inlen = zb->outlen = bufsize;
52 zb->inbuf = calloc(1, zb->inlen);
53 if (zb->inbuf == NULL) {
54 err = got_error_from_errno();
60 zb->outbuf = calloc(1, zb->outlen);
61 if (zb->outbuf == NULL) {
62 err = got_error_from_errno();
65 zb->flags |= GOT_ZSTREAM_F_OWN_OUTBUF;
75 const struct got_error *
76 got_inflate_read(struct got_zstream_buf *zb, FILE *f, size_t *outlenp)
78 size_t last_total_out = zb->z.total_out;
82 z->next_out = zb->outbuf;
83 z->avail_out = zb->outlen;
87 if (z->avail_in == 0) {
88 size_t n = fread(zb->inbuf, 1, zb->inlen, f);
91 return got_ferror(f, GOT_ERR_IO);
96 z->next_in = zb->inbuf;
99 ret = inflate(z, Z_SYNC_FLUSH);
100 } while (ret == Z_OK && z->avail_out > 0);
103 zb->flags |= GOT_ZSTREAM_F_HAVE_MORE;
105 if (ret != Z_STREAM_END)
106 return got_error(GOT_ERR_DECOMPRESSION);
107 zb->flags &= ~GOT_ZSTREAM_F_HAVE_MORE;
110 *outlenp = z->total_out - last_total_out;
114 const struct got_error *
115 got_inflate_read_fd(struct got_zstream_buf *zb, int fd, size_t *outlenp)
117 size_t last_total_out = zb->z.total_out;
118 z_stream *z = &zb->z;
121 z->next_out = zb->outbuf;
122 z->avail_out = zb->outlen;
126 if (z->avail_in == 0) {
127 ssize_t n = read(fd, zb->inbuf, zb->inlen);
129 return got_error_from_errno();
135 z->next_in = zb->inbuf;
138 ret = inflate(z, Z_SYNC_FLUSH);
139 } while (ret == Z_OK && z->avail_out > 0);
142 zb->flags |= GOT_ZSTREAM_F_HAVE_MORE;
144 if (ret != Z_STREAM_END)
145 return got_error(GOT_ERR_DECOMPRESSION);
146 zb->flags &= ~GOT_ZSTREAM_F_HAVE_MORE;
149 *outlenp = z->total_out - last_total_out;
153 const struct got_error *
154 got_inflate_read_mmap(struct got_zstream_buf *zb, uint8_t *map, size_t offset,
155 size_t len, size_t *outlenp, size_t *consumed)
157 size_t last_total_out = zb->z.total_out;
158 z_stream *z = &zb->z;
161 z->next_out = zb->outbuf;
162 z->avail_out = zb->outlen;
168 if (z->avail_in == 0) {
174 z->next_in = map + offset;
175 z->avail_in = MIN(zb->inlen, len);
176 *consumed += z->avail_in;
177 offset += z->avail_in;
180 ret = inflate(z, Z_SYNC_FLUSH);
181 } while (ret == Z_OK && z->avail_out > 0);
184 zb->flags |= GOT_ZSTREAM_F_HAVE_MORE;
186 if (ret != Z_STREAM_END)
187 return got_error(GOT_ERR_DECOMPRESSION);
188 zb->flags &= ~GOT_ZSTREAM_F_HAVE_MORE;
191 *outlenp = z->total_out - last_total_out;
196 got_inflate_end(struct got_zstream_buf *zb)
199 if (zb->flags & GOT_ZSTREAM_F_OWN_OUTBUF)
204 const struct got_error *
205 got_inflate_to_mem(uint8_t **outbuf, size_t *outlen, FILE *f)
207 const struct got_error *err;
209 struct got_zstream_buf zb;
212 *outbuf = calloc(1, GOT_ZSTREAM_BUFSIZE);
214 return got_error_from_errno();
215 err = got_inflate_init(&zb, *outbuf, GOT_ZSTREAM_BUFSIZE);
222 err = got_inflate_read(&zb, f, &avail);
226 if (zb.flags & GOT_ZSTREAM_F_HAVE_MORE) {
227 newbuf = reallocarray(*outbuf, 1,
228 *outlen + GOT_ZSTREAM_BUFSIZE);
229 if (newbuf == NULL) {
230 err = got_error_from_errno();
237 zb.outbuf = newbuf + *outlen;
238 zb.outlen = GOT_ZSTREAM_BUFSIZE;
240 } while (zb.flags & GOT_ZSTREAM_F_HAVE_MORE);
243 got_inflate_end(&zb);
247 const struct got_error *
248 got_inflate_to_mem_fd(uint8_t **outbuf, size_t *outlen, int infd)
250 const struct got_error *err;
252 struct got_zstream_buf zb;
255 *outbuf = calloc(1, GOT_ZSTREAM_BUFSIZE);
257 return got_error_from_errno();
258 err = got_inflate_init(&zb, *outbuf, GOT_ZSTREAM_BUFSIZE);
265 err = got_inflate_read_fd(&zb, infd, &avail);
269 if (zb.flags & GOT_ZSTREAM_F_HAVE_MORE) {
270 newbuf = reallocarray(*outbuf, 1,
271 *outlen + GOT_ZSTREAM_BUFSIZE);
272 if (newbuf == NULL) {
273 err = got_error_from_errno();
280 zb.outbuf = newbuf + *outlen;
281 zb.outlen = GOT_ZSTREAM_BUFSIZE;
283 } while (zb.flags & GOT_ZSTREAM_F_HAVE_MORE);
286 got_inflate_end(&zb);
290 const struct got_error *
291 got_inflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen, uint8_t *map,
292 size_t offset, size_t len)
294 const struct got_error *err;
296 struct got_zstream_buf zb;
300 *outbuf = calloc(1, GOT_ZSTREAM_BUFSIZE);
302 return got_error_from_errno();
303 err = got_inflate_init(&zb, *outbuf, GOT_ZSTREAM_BUFSIZE);
310 err = got_inflate_read_mmap(&zb, map, offset, len, &avail,
319 if (zb.flags & GOT_ZSTREAM_F_HAVE_MORE) {
320 newbuf = reallocarray(*outbuf, 1,
321 *outlen + GOT_ZSTREAM_BUFSIZE);
322 if (newbuf == NULL) {
323 err = got_error_from_errno();
330 zb.outbuf = newbuf + *outlen;
331 zb.outlen = GOT_ZSTREAM_BUFSIZE;
333 } while (zb.flags & GOT_ZSTREAM_F_HAVE_MORE);
336 got_inflate_end(&zb);
340 const struct got_error *
341 got_inflate_to_fd(size_t *outlen, FILE *infile, int outfd)
343 const struct got_error *err = NULL;
345 struct got_zstream_buf zb;
347 err = got_inflate_init(&zb, NULL, GOT_ZSTREAM_BUFSIZE);
354 err = got_inflate_read(&zb, infile, &avail);
359 n = write(outfd, zb.outbuf, avail);
361 err = got_error_from_errno();
366 } while (zb.flags & GOT_ZSTREAM_F_HAVE_MORE);
370 if (lseek(outfd, SEEK_SET, 0) == -1)
371 err = got_error_from_errno();
373 got_inflate_end(&zb);
377 const struct got_error *
378 got_inflate_to_file(size_t *outlen, FILE *infile, FILE *outfile)
380 const struct got_error *err;
382 struct got_zstream_buf zb;
384 err = got_inflate_init(&zb, NULL, GOT_ZSTREAM_BUFSIZE);
391 err = got_inflate_read(&zb, infile, &avail);
396 n = fwrite(zb.outbuf, avail, 1, outfile);
398 err = got_ferror(outfile, GOT_ERR_IO);
403 } while (zb.flags & GOT_ZSTREAM_F_HAVE_MORE);
408 got_inflate_end(&zb);
412 const struct got_error *
413 got_inflate_to_file_fd(size_t *outlen, int infd, FILE *outfile)
415 const struct got_error *err;
417 struct got_zstream_buf zb;
419 err = got_inflate_init(&zb, NULL, GOT_ZSTREAM_BUFSIZE);
426 err = got_inflate_read_fd(&zb, infd, &avail);
431 n = fwrite(zb.outbuf, avail, 1, outfile);
433 err = got_ferror(outfile, GOT_ERR_IO);
438 } while (zb.flags & GOT_ZSTREAM_F_HAVE_MORE);
443 got_inflate_end(&zb);
447 const struct got_error *
448 got_inflate_to_file_mmap(size_t *outlen, uint8_t *map, size_t offset,
449 size_t len, FILE *outfile)
451 const struct got_error *err;
453 struct got_zstream_buf zb;
456 err = got_inflate_init(&zb, NULL, GOT_ZSTREAM_BUFSIZE);
463 err = got_inflate_read_mmap(&zb, map, offset, len, &avail,
471 n = fwrite(zb.outbuf, avail, 1, outfile);
473 err = got_ferror(outfile, GOT_ERR_IO);
478 } while (zb.flags & GOT_ZSTREAM_F_HAVE_MORE);
483 got_inflate_end(&zb);