60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/* Copyright (c) 2003, Roger Dingledine
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* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
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* Copyright (c) 2007-2013, The Tor Project, Inc. */
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/* See LICENSE for licensing information */
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/**
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* \file torgzip.h
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* \brief Headers for torgzip.h
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**/
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#ifndef TOR_TORGZIP_H
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#define TOR_TORGZIP_H
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/** Enumeration of what kind of compression to use. Only ZLIB_METHOD is
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* guaranteed to be supported by the compress/uncompress functions here;
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* GZIP_METHOD may be supported if we built against zlib version 1.2 or later
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* and is_gzip_supported() returns true. */
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typedef enum {
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NO_METHOD=0, GZIP_METHOD=1, ZLIB_METHOD=2, UNKNOWN_METHOD=3
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} compress_method_t;
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int
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tor_gzip_compress(char **out, size_t *out_len,
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const char *in, size_t in_len,
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compress_method_t method);
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int
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tor_gzip_uncompress(char **out, size_t *out_len,
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const char *in, size_t in_len,
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compress_method_t method,
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int complete_only,
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int protocol_warn_level);
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int is_gzip_supported(void);
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const char *
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tor_zlib_get_version_str(void);
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const char *
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tor_zlib_get_header_version_str(void);
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compress_method_t detect_compression_method(const char *in, size_t in_len);
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/** Return values from tor_zlib_process; see that function's documentation for
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* details. */
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typedef enum {
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TOR_ZLIB_OK, TOR_ZLIB_DONE, TOR_ZLIB_BUF_FULL, TOR_ZLIB_ERR
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} tor_zlib_output_t;
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/** Internal state for an incremental zlib compression/decompression. */
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typedef struct tor_zlib_state_t tor_zlib_state_t;
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tor_zlib_state_t *tor_zlib_new(int compress, compress_method_t method);
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tor_zlib_output_t tor_zlib_process(tor_zlib_state_t *state,
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char **out, size_t *out_len,
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const char **in, size_t *in_len,
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int finish);
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void tor_zlib_free(tor_zlib_state_t *state);
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#endif
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