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Diffstat (limited to 'pdlzip.h')
| -rw-r--r-- | pdlzip.h | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/pdlzip.h b/pdlzip.h deleted file mode 100644 index 6229d7c..0000000 --- a/pdlzip.h +++ /dev/null @@ -1,190 +0,0 @@ -/* Pdlzip - Data compressor based on the LZMA algorithm - Copyright (C) 2010, 2011, 2012 Antonio Diaz Diaz. - - This program is free software: you have unlimited permission - to copy, distribute and modify it. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. -*/ - -#ifndef __cplusplus -enum Bool { false = 0, true = 1 }; -typedef enum Bool bool; -#endif - -#ifndef max - #define max(x,y) ((x) >= (y) ? (x) : (y)) -#endif -#ifndef min - #define min(x,y) ((x) <= (y) ? (x) : (y)) -#endif - -enum { - min_dictionary_bits = 12, - min_dictionary_size = 1 << min_dictionary_bits, - max_dictionary_bits = 26, - max_dictionary_size = 1 << max_dictionary_bits, - literal_context_bits = 3, - pos_state_bits = 2, - - len_low_bits = 3, - len_mid_bits = 3, - len_high_bits = 8, - len_low_symbols = 1 << len_low_bits, - len_mid_symbols = 1 << len_mid_bits, - len_high_symbols = 1 << len_high_bits, - max_len_symbols = len_low_symbols + len_mid_symbols + len_high_symbols, - - min_match_len = 2, /* must be 2 */ - max_match_len = min_match_len + max_len_symbols - 1, /* 273 */ - min_match_len_limit = 5 }; - -typedef uint32_t CRC32[256]; /* Table of CRCs of all 8-bit messages. */ - -extern CRC32 crc32; - -static inline void CRC32_init() - { - unsigned int n; - for( n = 0; n < 256; ++n ) - { - unsigned int c = n; - int k; - for( k = 0; k < 8; ++k ) - { if( c & 1 ) c = 0xEDB88320U ^ ( c >> 1 ); else c >>= 1; } - crc32[n] = c; - } - } - -static inline void CRC32_update_byte( uint32_t * crc, const uint8_t byte ) - { *crc = crc32[(*crc^byte)&0xFF] ^ ( *crc >> 8 ); } -static inline void CRC32_update_buf( uint32_t * crc, const uint8_t * const buffer, - const int size ) - { - int i; - for( i = 0; i < size; ++i ) - *crc = crc32[(*crc^buffer[i])&0xFF] ^ ( *crc >> 8 ); - } - - -static inline int real_bits( const int value ) - { - int bits = 0, i, mask; - for( i = 1, mask = 1; mask > 0; ++i, mask <<= 1 ) - if( value & mask ) bits = i; - return bits; - } - - -static const uint8_t magic_string[4] = { 'L', 'Z', 'I', 'P' }; - -typedef uint8_t File_header[6]; /* 0-3 magic bytes */ - /* 4 version */ - /* 5 coded_dict_size */ -enum { Fh_size = 6 }; - -static inline void Fh_set_magic( File_header data ) - { - memcpy( data, magic_string, 4 ); - data[4] = 1; - } - -static inline bool Fh_verify_magic( const File_header data ) - { - return ( memcmp( data, magic_string, 4 ) == 0 ); - } - -static inline uint8_t Fh_version( const File_header data ) - { return data[4]; } - -static inline bool Fh_verify_version( const File_header data ) - { return ( data[4] <= 1 ); } - -static inline int Fh_get_dictionary_size( const File_header data ) - { - int sz = ( 1 << ( data[5] & 0x1F ) ); - if( sz > min_dictionary_size && sz <= max_dictionary_size ) - sz -= ( sz / 16 ) * ( ( data[5] >> 5 ) & 0x07 ); - return sz; - } - -static inline bool Fh_set_dictionary_size( File_header data, const int sz ) - { - if( sz >= min_dictionary_size && sz <= max_dictionary_size ) - { - data[5] = real_bits( sz - 1 ); - if( sz > min_dictionary_size ) - { - const int base_size = 1 << data[5]; - const int wedge = base_size / 16; - int i; - for( i = 7; i >= 1; --i ) - if( base_size - ( i * wedge ) >= sz ) - { data[5] |= ( i << 5 ); break; } - } - return true; - } - return false; - } - - -typedef uint8_t File_trailer[20]; - /* 0-3 CRC32 of the uncompressed data */ - /* 4-11 size of the uncompressed data */ - /* 12-19 member size including header and trailer */ - -enum { Ft_size = 20 }; - -static inline int Ft_versioned_size( const int version ) - { return ( ( version >= 1 ) ? 20 : 12 ); } - -static inline uint32_t Ft_get_data_crc( const File_trailer data ) - { - uint32_t tmp = 0; - int i; - for( i = 3; i >= 0; --i ) { tmp <<= 8; tmp += data[i]; } - return tmp; - } - -static inline void Ft_set_data_crc( File_trailer data, uint32_t crc ) - { - int i; - for( i = 0; i <= 3; ++i ) { data[i] = (uint8_t)crc; crc >>= 8; } - } - -static inline long long Ft_get_data_size( const File_trailer data ) - { - long long tmp = 0; - int i; - for( i = 11; i >= 4; --i ) { tmp <<= 8; tmp += data[i]; } - return tmp; - } - -static inline void Ft_set_data_size( File_trailer data, long long sz ) - { - int i; - for( i = 4; i <= 11; ++i ) { data[i] = (uint8_t)sz; sz >>= 8; } - } - -static inline long long Ft_get_member_size( const File_trailer data ) - { - long long tmp = 0; - int i; - for( i = 19; i >= 12; --i ) { tmp <<= 8; tmp += data[i]; } - return tmp; - } - -static inline void Ft_set_member_size( File_trailer data, long long sz ) - { - int i; - for( i = 12; i <= 19; ++i ) { data[i] = (uint8_t)sz; sz >>= 8; } - } - - -/* defined in main.c */ -extern int verbosity; - -void show_error( const char * const msg, const int errcode, const bool help ); -void internal_error( const char * const msg ); |