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_path_priv.h"
29 #include "got_zb_priv.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 *outlenp)
68 size_t last_total_out = zb->z.total_out;
72 z->next_out = zb->outbuf;
73 z->avail_out = zb->outlen;
77 if (z->avail_in == 0) {
78 size_t n = fread(zb->inbuf, 1, zb->inlen, f);
81 return got_ferror(f, GOT_ERR_IO);
84 z->next_in = zb->inbuf;
87 ret = inflate(z, Z_SYNC_FLUSH);
88 } while (ret == Z_OK && z->avail_out > 0);
91 zb->flags |= GOT_ZSTREAM_F_HAVE_MORE;
93 if (ret != Z_STREAM_END)
94 return got_error(GOT_ERR_DECOMPRESSION);
95 zb->flags &= ~GOT_ZSTREAM_F_HAVE_MORE;
98 *outlenp = z->total_out - last_total_out;
103 got_inflate_end(struct got_zstream_buf *zb)
110 const struct got_error *
111 got_inflate_to_mem(uint8_t **outbuf, size_t *outlen, FILE *f)
113 const struct got_error *err;
115 struct got_zstream_buf zb;
118 err = got_inflate_init(&zb, 8192);
126 err = got_inflate_read(&zb, f, &avail);
130 newbuf = reallocarray(*outbuf, 1, *outlen + avail);
131 if (newbuf == NULL) {
135 err = got_error(GOT_ERR_NO_MEM);
138 memcpy(newbuf + *outlen, zb.outbuf, avail);
142 } while (zb.flags & GOT_ZSTREAM_F_HAVE_MORE);
145 got_inflate_end(&zb);
149 const struct got_error *
150 got_inflate_to_file(size_t *outlen, FILE *infile, FILE *outfile)
152 const struct got_error *err;
154 struct got_zstream_buf zb;
157 err = got_inflate_init(&zb, 8192);
164 err = got_inflate_read(&zb, infile, &avail);
169 n = fwrite(zb.outbuf, avail, 1, outfile);
171 err = got_ferror(outfile, GOT_ERR_IO);
176 } while (zb.flags & GOT_ZSTREAM_F_HAVE_MORE);
181 got_inflate_end(&zb);