1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/* Copyright (c) 2003, Roger Dingledine
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2015, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
* \file torgzip.h
* \brief Headers for torgzip.h
**/
#ifndef TOR_TORGZIP_H
#define TOR_TORGZIP_H
/** Enumeration of what kind of compression to use. Only ZLIB_METHOD is
* guaranteed to be supported by the compress/uncompress functions here;
* GZIP_METHOD may be supported if we built against zlib version 1.2 or later
* and is_gzip_supported() returns true. */
typedef enum {
NO_METHOD=0, GZIP_METHOD=1, ZLIB_METHOD=2, UNKNOWN_METHOD=3
} compress_method_t;
int
tor_gzip_compress(char **out, size_t *out_len,
const char *in, size_t in_len,
compress_method_t method);
int
tor_gzip_uncompress(char **out, size_t *out_len,
const char *in, size_t in_len,
compress_method_t method,
int complete_only,
int protocol_warn_level);
int is_gzip_supported(void);
const char *
tor_zlib_get_version_str(void);
const char *
tor_zlib_get_header_version_str(void);
compress_method_t detect_compression_method(const char *in, size_t in_len);
/** Return values from tor_zlib_process; see that function's documentation for
* details. */
typedef enum {
TOR_ZLIB_OK, TOR_ZLIB_DONE, TOR_ZLIB_BUF_FULL, TOR_ZLIB_ERR
} tor_zlib_output_t;
/** Internal state for an incremental zlib compression/decompression. */
typedef struct tor_zlib_state_t tor_zlib_state_t;
tor_zlib_state_t *tor_zlib_new(int compress, compress_method_t method);
tor_zlib_output_t tor_zlib_process(tor_zlib_state_t *state,
char **out, size_t *out_len,
const char **in, size_t *in_len,
int finish);
void tor_zlib_free(tor_zlib_state_t *state);
size_t tor_zlib_state_size(const tor_zlib_state_t *state);
size_t tor_zlib_get_total_allocation(void);
#endif
|
