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>
25 #include "got_error.h"
26 #include "got_object.h"
31 const struct got_error *
32 got_inflate_init(struct got_zstream_buf *zb, size_t bufsize)
34 const struct got_error *err = NULL;
36 memset(zb, 0, sizeof(*zb));
38 zb->z.zalloc = Z_NULL;
40 if (inflateInit(&zb->z) != Z_OK) {
41 err = got_error(GOT_ERR_IO);
45 zb->inlen = zb->outlen = bufsize;
47 zb->inbuf = calloc(1, zb->inlen);
48 if (zb->inbuf == NULL) {
49 err = got_error(GOT_ERR_NO_MEM);
53 zb->outbuf = calloc(1, zb->outlen);
54 if (zb->outbuf == NULL) {
55 err = got_error(GOT_ERR_NO_MEM);
65 const struct got_error *
66 got_inflate_read(struct got_zstream_buf *zb, FILE *f, size_t *inlenp,
69 size_t last_total_out = zb->z.total_out;
73 z->next_out = zb->outbuf;
74 z->avail_out = zb->outlen;
80 if (z->avail_in == 0) {
81 size_t n = fread(zb->inbuf, 1, zb->inlen, f);
84 return got_ferror(f, GOT_ERR_IO);
87 z->next_in = zb->inbuf;
92 ret = inflate(z, Z_SYNC_FLUSH);
93 } while (ret == Z_OK && z->avail_out > 0);
96 zb->flags |= GOT_ZSTREAM_F_HAVE_MORE;
98 if (ret != Z_STREAM_END)
99 return got_error(GOT_ERR_DECOMPRESSION);
100 zb->flags &= ~GOT_ZSTREAM_F_HAVE_MORE;
103 *outlenp = z->total_out - last_total_out;
108 got_inflate_end(struct got_zstream_buf *zb)
115 const struct got_error *
116 got_inflate_to_mem(uint8_t **outbuf, size_t *outlen, FILE *f)
118 const struct got_error *err;
119 size_t consumed, avail;
120 struct got_zstream_buf zb;
123 err = got_inflate_init(&zb, 8192);
131 err = got_inflate_read(&zb, f, &consumed, &avail);
135 newbuf = reallocarray(*outbuf, 1, *outlen + avail);
136 if (newbuf == NULL) {
140 err = got_error(GOT_ERR_NO_MEM);
143 memcpy(newbuf + *outlen, zb.outbuf, avail);
147 } while (zb.flags & GOT_ZSTREAM_F_HAVE_MORE);
150 got_inflate_end(&zb);
154 const struct got_error *
155 got_inflate_to_file(size_t *outlen, FILE *infile, FILE *outfile)
157 const struct got_error *err;
159 struct got_zstream_buf zb;
162 err = got_inflate_init(&zb, 8192);
169 err = got_inflate_read(&zb, infile, NULL, &avail);
174 n = fwrite(zb.outbuf, avail, 1, outfile);
176 err = got_ferror(outfile, GOT_ERR_IO);
181 } while (zb.flags & GOT_ZSTREAM_F_HAVE_MORE);
186 got_inflate_end(&zb);