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_inflate_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_INFLATE_F_HAVE_MORE		0x01
25 #define GOT_INFLATE_F_OWN_OUTBUF	0x02
26 	uint32_t *input_crc;
27 };
28 
29 #define GOT_INFLATE_BUFSIZE		32768
30 
31 const struct got_error *got_inflate_init(struct got_inflate_buf *, uint8_t *,
32     size_t, uint32_t *);
33 const struct got_error *got_inflate_read(struct got_inflate_buf *, FILE *,
34     size_t *, size_t *);
35 const struct got_error *got_inflate_read_fd(struct got_inflate_buf *, int,
36     size_t *, size_t *);
37 const struct got_error *got_inflate_read_mmap(struct got_inflate_buf *,
38     uint8_t *, size_t, size_t, size_t *, size_t *);
39 void got_inflate_end(struct got_inflate_buf *);
40 const struct got_error *got_inflate_to_mem(uint8_t **, size_t *, size_t *,
41     FILE *);
42 const struct got_error *got_inflate_to_mem_fd(uint8_t **, size_t *, size_t *,
43     uint32_t *, size_t, int);
44 const struct got_error *got_inflate_to_mem_mmap(uint8_t **, size_t *, size_t *,
45     uint32_t *, uint8_t *, size_t, size_t);
46 const struct got_error *got_inflate_to_file(size_t *, FILE *, FILE *);
47 const struct got_error *got_inflate_to_file_fd(size_t *, size_t *, uint32_t *,
48     int, FILE *);
49 const struct got_error *got_inflate_to_fd(size_t *, FILE *, int);
50 const struct got_error *got_inflate_to_file_mmap(size_t *, size_t *,
51     uint32_t *, uint8_t *, size_t, size_t, FILE *);