1/*
2 * librdkafka - Apache Kafka C library
3 *
4 * Copyright (c) 2018 Magnus Edenhill
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef _LINUX_SNAPPY_H
30#define _LINUX_SNAPPY_H 1
31
32#include <stdbool.h>
33#include <stddef.h>
34
35/* Only needed for compression. This preallocates the worst case */
36struct snappy_env {
37 unsigned short *hash_table;
38 void *scratch;
39 void *scratch_output;
40};
41
42struct iovec;
43int rd_kafka_snappy_init_env(struct snappy_env *env);
44int rd_kafka_snappy_init_env_sg(struct snappy_env *env, bool sg);
45void rd_kafka_snappy_free_env(struct snappy_env *env);
46int rd_kafka_snappy_uncompress_iov(struct iovec *iov_in, int iov_in_len,
47 size_t input_len, char *uncompressed);
48int rd_kafka_snappy_uncompress(const char *compressed, size_t n, char *uncompressed);
49char *rd_kafka_snappy_java_uncompress (const char *inbuf, size_t inlen,
50 size_t *outlenp,
51 char *errstr, size_t errstr_size);
52int rd_kafka_snappy_compress_iov(struct snappy_env *env,
53 const struct iovec *iov_in, size_t iov_in_cnt,
54 size_t input_length,
55 struct iovec *iov_out);
56bool rd_kafka_snappy_uncompressed_length(const char *buf, size_t len, size_t *result);
57size_t rd_kafka_snappy_max_compressed_length(size_t source_len);
58
59
60
61
62#endif
63