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"
28 #include "got_lib_path.h"
29 #include "got_lib_zbuf.h"
31 const struct got_error *
32 got_inflate_init(struct got_zstream_buf *zb, uint8_t *outbuf, 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_from_errno();
54 zb->outbuf = calloc(1, zb->outlen);
55 if (zb->outbuf == NULL) {
56 err = got_error_from_errno();
59 zb->flags |= GOT_ZSTREAM_F_OWN_OUTBUF;
69 const struct got_error *
70 got_inflate_read(struct got_zstream_buf *zb, FILE *f, size_t *outlenp)
72 size_t last_total_out = zb->z.total_out;
76 z->next_out = zb->outbuf;
77 z->avail_out = zb->outlen;
81 if (z->avail_in == 0) {
82 size_t n = fread(zb->inbuf, 1, zb->inlen, f);
85 return got_ferror(f, GOT_ERR_IO);
88 z->next_in = zb->inbuf;
91 ret = inflate(z, Z_SYNC_FLUSH);
92 } while (ret == Z_OK && z->avail_out > 0);
95 zb->flags |= GOT_ZSTREAM_F_HAVE_MORE;
97 if (ret != Z_STREAM_END)
98 return got_error(GOT_ERR_DECOMPRESSION);
99 zb->flags &= ~GOT_ZSTREAM_F_HAVE_MORE;
102 *outlenp = z->total_out - last_total_out;
107 got_inflate_end(struct got_zstream_buf *zb)
110 if (zb->flags & GOT_ZSTREAM_F_OWN_OUTBUF)
115 const struct got_error *
116 got_inflate_to_mem(uint8_t **outbuf, size_t *outlen, FILE *f)
118 const struct got_error *err;
120 struct got_zstream_buf zb;
123 *outbuf = calloc(1, GOT_ZSTREAM_BUFSIZE);
125 return got_error_from_errno();
126 err = got_inflate_init(&zb, *outbuf, GOT_ZSTREAM_BUFSIZE);
133 err = got_inflate_read(&zb, f, &avail);
137 if (zb.flags & GOT_ZSTREAM_F_HAVE_MORE) {
138 newbuf = reallocarray(*outbuf, 1,
139 *outlen + GOT_ZSTREAM_BUFSIZE);
140 if (newbuf == NULL) {
141 err = got_error_from_errno();
148 zb.outbuf = newbuf + *outlen;
149 zb.outlen = GOT_ZSTREAM_BUFSIZE;
151 } while (zb.flags & GOT_ZSTREAM_F_HAVE_MORE);
154 got_inflate_end(&zb);
158 const struct got_error *
159 got_inflate_to_file(size_t *outlen, FILE *infile, FILE *outfile)
161 const struct got_error *err;
163 struct got_zstream_buf zb;
165 err = got_inflate_init(&zb, NULL, GOT_ZSTREAM_BUFSIZE);
172 err = got_inflate_read(&zb, infile, &avail);
177 n = fwrite(zb.outbuf, avail, 1, outfile);
179 err = got_ferror(outfile, GOT_ERR_IO);
184 } while (zb.flags & GOT_ZSTREAM_F_HAVE_MORE);
189 got_inflate_end(&zb);