1 2181e0c8 2019-03-19 stsp /*
 2 2181e0c8 2019-03-19 stsp  * Copyright (c) 2019 Stefan Sperling <stsp@openbsd.org>
 3 2181e0c8 2019-03-19 stsp  *
 4 2181e0c8 2019-03-19 stsp  * Permission to use, copy, modify, and distribute this software for any
 5 2181e0c8 2019-03-19 stsp  * purpose with or without fee is hereby granted, provided that the above
 6 2181e0c8 2019-03-19 stsp  * copyright notice and this permission notice appear in all copies.
 7 2181e0c8 2019-03-19 stsp  *
 8 2181e0c8 2019-03-19 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 9 2181e0c8 2019-03-19 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 2181e0c8 2019-03-19 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 2181e0c8 2019-03-19 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 2181e0c8 2019-03-19 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 2181e0c8 2019-03-19 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 2181e0c8 2019-03-19 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 2181e0c8 2019-03-19 stsp  */
16 2181e0c8 2019-03-19 stsp 
17 91b40e30 2021-05-21 stsp struct got_deflate_checksum {
18 91b40e30 2021-05-21 stsp 	/* If not NULL, mix output bytes into this CRC checksum. */
19 91b40e30 2021-05-21 stsp 	uint32_t *output_crc;
20 91b40e30 2021-05-21 stsp 
21 91b40e30 2021-05-21 stsp 	/* If not NULL, mix output bytes into this SHA1 context. */
22 91b40e30 2021-05-21 stsp 	SHA1_CTX *output_sha1;
23 91b40e30 2021-05-21 stsp };
24 91b40e30 2021-05-21 stsp 
25 2181e0c8 2019-03-19 stsp struct got_deflate_buf {
26 2181e0c8 2019-03-19 stsp 	z_stream z;
27 31e61ec1 2021-09-28 naddy 	uint8_t *inbuf;
28 2181e0c8 2019-03-19 stsp 	size_t inlen;
29 31e61ec1 2021-09-28 naddy 	uint8_t *outbuf;
30 2181e0c8 2019-03-19 stsp 	size_t outlen;
31 2181e0c8 2019-03-19 stsp 	int flags;
32 2181e0c8 2019-03-19 stsp #define GOT_DEFLATE_F_HAVE_MORE		0x01
33 2181e0c8 2019-03-19 stsp #define GOT_DEFLATE_F_OWN_OUTBUF	0x02
34 2181e0c8 2019-03-19 stsp };
35 2181e0c8 2019-03-19 stsp 
36 2181e0c8 2019-03-19 stsp #define GOT_DEFLATE_BUFSIZE		8192
37 2181e0c8 2019-03-19 stsp 
38 2181e0c8 2019-03-19 stsp const struct got_error *got_deflate_init(struct got_deflate_buf *, uint8_t *,
39 3b9e6fcf 2021-06-05 stsp     size_t);
40 2181e0c8 2019-03-19 stsp const struct got_error *got_deflate_read(struct got_deflate_buf *, FILE *,
41 2181e0c8 2019-03-19 stsp     size_t *);
42 2181e0c8 2019-03-19 stsp void got_deflate_end(struct got_deflate_buf *);
43 91b40e30 2021-05-21 stsp const struct got_error *got_deflate_to_file(size_t *, FILE *, FILE *,
44 91b40e30 2021-05-21 stsp     struct got_deflate_checksum *);