diff options
Diffstat (limited to 'src/common/torgzip.h')
| -rw-r--r-- | src/common/torgzip.h | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/src/common/torgzip.h b/src/common/torgzip.h index 5db03fe6e0..00f62dcb45 100644 --- a/src/common/torgzip.h +++ b/src/common/torgzip.h @@ -1,6 +1,6 @@ /* Copyright (c) 2003, Roger Dingledine * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson. - * Copyright (c) 2007-2013, The Tor Project, Inc. */ + * Copyright (c) 2007-2016, The Tor Project, Inc. */ /* See LICENSE for licensing information */ /** @@ -19,6 +19,15 @@ typedef enum { NO_METHOD=0, GZIP_METHOD=1, ZLIB_METHOD=2, UNKNOWN_METHOD=3 } compress_method_t; +/** + * Enumeration to define tradeoffs between memory usage and compression level. + * HIGH_COMPRESSION saves the most bandwidth; LOW_COMPRESSION saves the most + * memory. + **/ +typedef enum { + HIGH_COMPRESSION, MEDIUM_COMPRESSION, LOW_COMPRESSION +} zlib_compression_level_t; + int tor_gzip_compress(char **out, size_t *out_len, const char *in, size_t in_len, @@ -47,7 +56,8 @@ typedef enum { } 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_state_t *tor_zlib_new(int compress, compress_method_t method, + zlib_compression_level_t level); tor_zlib_output_t tor_zlib_process(tor_zlib_state_t *state, char **out, size_t *out_len, @@ -55,5 +65,8 @@ tor_zlib_output_t tor_zlib_process(tor_zlib_state_t *state, 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 |