2 * Copyright (c) 2019 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 struct got_deflate_checksum {
18 /* If not NULL, mix output bytes into this CRC checksum. */
21 /* If not NULL, mix output bytes into this SHA1 context. */
22 SHA1_CTX *output_sha1;
25 struct got_deflate_buf {
32 #define GOT_DEFLATE_F_HAVE_MORE 0x01
33 #define GOT_DEFLATE_F_OWN_OUTBUF 0x02
34 struct got_deflate_checksum *csum;
37 #define GOT_DEFLATE_BUFSIZE 8192
39 const struct got_error *got_deflate_init(struct got_deflate_buf *, uint8_t *,
40 size_t, struct got_deflate_checksum *);
41 const struct got_error *got_deflate_read(struct got_deflate_buf *, FILE *,
43 void got_deflate_end(struct got_deflate_buf *);
44 const struct got_error *got_deflate_to_file(size_t *, FILE *, FILE *,
45 struct got_deflate_checksum *);