torgzip.h
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上传日期:2019-07-14
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- /* Copyright (c) 2003, Roger Dingledine
- * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
- * Copyright (c) 2007-2009, 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);
- 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);
- #endif