diff options
Diffstat (limited to 'decoder.cc')
| -rw-r--r-- | decoder.cc | 62 |
1 files changed, 59 insertions, 3 deletions
@@ -1,5 +1,5 @@ /* Lzip - Data compressor based on the LZMA algorithm - Copyright (C) 2008, 2009, 2010 Antonio Diaz Diaz. + Copyright (C) 2008, 2009, 2010, 2011 Antonio Diaz Diaz. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -25,6 +25,7 @@ #include <string> #include <vector> #include <stdint.h> +#include <unistd.h> #include "lzip.h" #include "decoder.h" @@ -32,6 +33,61 @@ const CRC32 crc32; + +void Pretty_print::operator()( const char * const msg ) const throw() + { + if( verbosity_ >= 0 ) + { + if( first_post ) + { + first_post = false; + std::fprintf( stderr, " %s: ", name_.c_str() ); + for( unsigned int i = 0; i < longest_name - name_.size(); ++i ) + std::fprintf( stderr, " " ); + if( !msg ) std::fflush( stderr ); + } + if( msg ) std::fprintf( stderr, "%s.\n", msg ); + } + } + + +// Returns the number of bytes really read. +// If (returned value < size) and (errno == 0), means EOF was reached. +// +int readblock( const int fd, uint8_t * const buf, const int size ) throw() + { + int rest = size; + errno = 0; + while( rest > 0 ) + { + errno = 0; + const int n = read( fd, buf + size - rest, rest ); + if( n > 0 ) rest -= n; + else if( n == 0 ) break; + else if( errno != EINTR && errno != EAGAIN ) break; + } + return ( rest > 0 ) ? size - rest : size; + } + + +// Returns the number of bytes really written. +// If (returned value < size), it is always an error. +// +int writeblock( const int fd, const uint8_t * const buf, const int size ) throw() + { + int rest = size; + errno = 0; + while( rest > 0 ) + { + errno = 0; + const int n = write( fd, buf + size - rest, rest ); + if( n > 0 ) rest -= n; + else if( errno && errno != EINTR && errno != EAGAIN ) break; + } + return ( rest > 0 ) ? size - rest : size; + } + + bool Range_decoder::read_block() { if( !at_stream_end ) @@ -120,12 +176,12 @@ bool LZ_decoder::verify_trailer( const Pretty_print & pp ) const trailer.member_size(), member_size, member_size ); } } - if( !error && pp.verbosity() >= 4 && data_position() > 0 && member_size > 0 ) + if( !error && pp.verbosity() >= 3 && data_position() > 0 && member_size > 0 ) std::fprintf( stderr, "%6.3f:1, %6.3f bits/byte, %5.2f%% saved. ", (double)data_position() / member_size, ( 8.0 * member_size ) / data_position(), 100.0 * ( 1.0 - ( (double)member_size / data_position() ) ) ); - if( !error && pp.verbosity() >= 3 ) + if( !error && pp.verbosity() >= 4 ) std::fprintf( stderr, "data CRC %08X, data size %9lld, member size %8lld. ", (unsigned int)trailer.data_crc(), trailer.data_size(), trailer.member_size() ); |