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/*
* Copyright (c) 2019 Stefan Sperling <stsp@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
struct got_deflate_checksum {
/* If not NULL, mix output bytes into this CRC checksum. */
uint32_t *output_crc;
/* If not NULL, mix output bytes into this hash context. */
struct got_hash *output_ctx;
};
struct got_deflate_buf {
z_stream z;
uint8_t *inbuf;
size_t inlen;
uint8_t *outbuf;
size_t outlen;
int flags;
#define GOT_DEFLATE_F_HAVE_MORE 0x01
#define GOT_DEFLATE_F_OWN_OUTBUF 0x02
};
#define GOT_DEFLATE_BUFSIZE 8192
const struct got_error *got_deflate_init(struct got_deflate_buf *, uint8_t *,
size_t);
const struct got_error *got_deflate_read(struct got_deflate_buf *, FILE *,
off_t, size_t *, off_t *);
const struct got_error *got_deflate_read_mmap(struct got_deflate_buf *,
uint8_t *, size_t, size_t, size_t *, size_t *);
void got_deflate_end(struct got_deflate_buf *);
const struct got_error *got_deflate_to_fd(off_t *, FILE *, off_t, int,
struct got_deflate_checksum *);
const struct got_error *got_deflate_to_fd_mmap(off_t *, uint8_t *,
size_t, size_t, int, struct got_deflate_checksum *);
const struct got_error *got_deflate_to_file(off_t *, FILE *, off_t, FILE *,
struct got_deflate_checksum *);
const struct got_error *got_deflate_to_file_mmap(off_t *, uint8_t *,
size_t, size_t, FILE *, struct got_deflate_checksum *);
const struct got_error *got_deflate_flush(struct got_deflate_buf *, FILE *,
struct got_deflate_checksum *, off_t *);
const struct got_error *got_deflate_append_to_file_mmap(
struct got_deflate_buf *, off_t *, uint8_t *, size_t, size_t, FILE *,
struct got_deflate_checksum *);
const struct got_error *got_deflate_to_mem_mmap(uint8_t **, size_t *, size_t *,
struct got_deflate_checksum *, uint8_t *, size_t, size_t);
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