diff options
Diffstat (limited to 'pdlzip.h')
| -rw-r--r-- | pdlzip.h | 35 |
1 files changed, 19 insertions, 16 deletions
@@ -39,7 +39,7 @@ static inline void CRC32_init() { unsigned int c = n; for( int k = 0; k < 8; ++k ) - { if( c & 1 ) c = 0xEDB88320 ^ ( c >> 1 ); else c >>= 1; } + { if( c & 1 ) c = 0xEDB88320U ^ ( c >> 1 ); else c >>= 1; } crc32[n] = c; } } @@ -57,6 +57,7 @@ static inline void CRC32_update_buf( uint32_t * crc, const uint8_t * const buffe 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 header ) { @@ -87,23 +88,23 @@ static inline int Fh_real_bits( const int value ) static inline int Fh_get_dictionary_size( const File_header header ) { - int size = ( 1 << ( header[5] & 0x1F ) ); - if( size > min_dictionary_size && size <= max_dictionary_size ) - size -= ( size / 16 ) * ( ( header[5] >> 5 ) & 0x07 ); - return size; + int sz = ( 1 << ( header[5] & 0x1F ) ); + if( sz > min_dictionary_size && sz <= max_dictionary_size ) + sz -= ( sz / 16 ) * ( ( header[5] >> 5 ) & 0x07 ); + return sz; } -static inline bool Fh_set_dictionary_size( File_header header, const int size ) +static inline bool Fh_set_dictionary_size( File_header header, const int sz ) { - if( size >= min_dictionary_size && size <= max_dictionary_size ) + if( sz >= min_dictionary_size && sz <= max_dictionary_size ) { - header[5] = Fh_real_bits( size - 1 ); - if( size > min_dictionary_size ) + header[5] = Fh_real_bits( sz - 1 ); + if( sz > min_dictionary_size ) { const int base_size = 1 << header[5]; const int wedge = base_size / 16; for( int i = 7; i >= 1; --i ) - if( base_size - ( i * wedge ) >= size ) + if( base_size - ( i * wedge ) >= sz ) { header[5] |= ( i << 5 ); break; } } return true; @@ -117,8 +118,10 @@ typedef uint8_t File_trailer[20]; // 4-11 size of the uncompressed data // 12-19 member size including header and trailer -static inline int Ft_size( const int version ) - { return sizeof (File_trailer) - ( ( version >= 1 ) ? 0 : 8 ); } +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 trailer ) { @@ -137,9 +140,9 @@ static inline long long Ft_get_data_size( const File_trailer trailer ) return tmp; } -static inline void Ft_set_data_size( File_trailer trailer, long long size ) +static inline void Ft_set_data_size( File_trailer trailer, long long sz ) { - for( int i = 4; i <= 11; ++i ) { trailer[i] = (uint8_t)size; size >>= 8; } + for( int i = 4; i <= 11; ++i ) { trailer[i] = (uint8_t)sz; sz >>= 8; } } static inline long long Ft_get_member_size( const File_trailer trailer ) @@ -149,9 +152,9 @@ static inline long long Ft_get_member_size( const File_trailer trailer ) return tmp; } -static inline void Ft_set_member_size( File_trailer trailer, long long size ) +static inline void Ft_set_member_size( File_trailer trailer, long long sz ) { - for( int i = 12; i <= 19; ++i ) { trailer[i] = (uint8_t)size; size >>= 8; } + for( int i = 12; i <= 19; ++i ) { trailer[i] = (uint8_t)sz; sz >>= 8; } } |