1 /*
2  * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
3  *
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.
7  *
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.
15  */
16 
17 struct got_zstream_buf {
18 	z_stream z;
19 	char *inbuf;
20 	size_t inlen;
21 	char *outbuf;
22 	size_t outlen;
23 	int flags;
24 #define GOT_ZSTREAM_F_HAVE_MORE		0x01
25 #define GOT_ZSTREAM_F_OWN_OUTBUF	0x02
26 };
27 
28 #define GOT_ZSTREAM_BUFSIZE		8192
29 
30 const struct got_error *got_inflate_init(struct got_zstream_buf *, uint8_t *,
31     size_t);
32 const struct got_error *got_inflate_read(struct got_zstream_buf *, FILE *,
33     size_t *);
34 const struct got_error *got_inflate_read_fd(struct got_zstream_buf *, int,
35     size_t *);
36 const struct got_error *got_inflate_read_mmap(struct got_zstream_buf *,
37     uint8_t *, size_t, size_t, size_t *, size_t *);
38 void got_inflate_end(struct got_zstream_buf *);
39 const struct got_error *got_inflate_to_mem(uint8_t **, size_t *, FILE *);
40 const struct got_error *got_inflate_to_mem_fd(uint8_t **, size_t *, int);
41 const struct got_error *got_inflate_to_mem_mmap(uint8_t **, size_t *, uint8_t *,
42     size_t, size_t);
43 const struct got_error *got_inflate_to_file(size_t *, FILE *, FILE *);
44 const struct got_error *got_inflate_to_file_fd(size_t *, int, FILE *);
45 const struct got_error *got_inflate_to_fd(size_t *, FILE *, int);
46 const struct got_error *got_inflate_to_file_mmap(size_t *, uint8_t *, size_t,
47     size_t, FILE *);