diff options
Diffstat (limited to '')
| -rw-r--r-- | lzip.h | 20 |
1 files changed, 16 insertions, 4 deletions
@@ -1,5 +1,5 @@ /* Lzlib - A compression library for lzip files - Copyright (C) 2009 Antonio Diaz Diaz. + Copyright (C) 2009, 2010 Antonio Diaz Diaz. This library is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -12,7 +12,7 @@ GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. + along with this library. If not, see <http://www.gnu.org/licenses/>. As a special exception, you may use this file as part of a free software library without restriction. Specifically, if other files @@ -58,6 +58,10 @@ public: }; +const int min_dictionary_bits = 12; +const int min_dictionary_size = 1 << min_dictionary_bits; +const int max_dictionary_bits = 29; +const int max_dictionary_size = 1 << max_dictionary_bits; const int literal_context_bits = 3; const int pos_state_bits = 2; const int pos_states = 1 << pos_state_bits; @@ -80,6 +84,7 @@ const int max_len_symbols = len_low_symbols + len_mid_symbols + len_high_symbols const int min_match_len = 2; // must be 2 const int max_match_len = min_match_len + max_len_symbols - 1; // 273 +const int min_match_len_limit = 5; const int max_dis_states = 4; @@ -152,6 +157,13 @@ struct File_header return ( version <= 1 ); } + bool verify() const throw() + { + return ( verify_magic() && verify_version() && + dictionary_size() >= min_dictionary_size && + dictionary_size() <= max_dictionary_size ); + } + static int real_bits( const int value ) throw() { int bits = 0; @@ -241,9 +253,9 @@ struct File_trailer class Circular_buffer { protected: - const int buffer_size; + const int buffer_size; // capacity == buffer_size - 1 uint8_t * const buffer; - int get; + int get; // buffer is empty when get == put int put; void reset() throw() { get = 0; put = 0; } |