mirror of
https://github.com/polserver/polserver
synced 2026-08-13 08:23:08 -04:00
107 lines
2.9 KiB
C++
107 lines
2.9 KiB
C++
/** @file
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*
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* @par History
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* - 2009/08/25 Shinigami: STLport-5.2.1 fix: Error message in BinaryFile::Seek stripped little bit.
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* - 2009/09/01 MuadDib: STLPort-5.x fix: BinaryFile::Seek requires casting to long in decint
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* under Win32
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*/
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#include "binaryfile.h"
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#include <stdexcept>
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#include "passert.h"
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#include "strutil.h"
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namespace Pol
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{
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namespace Clib
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{
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BinaryFile::BinaryFile() {}
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BinaryFile::BinaryFile( const std::string& filename, std::ios::openmode mode ) : _filename( "" )
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{
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Open( filename, mode );
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}
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BinaryFile::~BinaryFile() {}
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void BinaryFile::Open( const std::string& filename, std::ios::openmode mode )
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{
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passert( !_file.is_open() );
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_filename = filename;
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_file.open( _filename.c_str(), mode | std::ios::binary );
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if ( !_file.is_open() )
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throw std::runtime_error( "BinaryFile::Open('" + _filename + ", " + hexint( mode ) +
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") failed." );
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}
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void BinaryFile::Close()
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{
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passert( _file.is_open() );
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_file.close();
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_filename = "";
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}
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void BinaryFile::Seek( std::fstream::pos_type abs_offset )
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{
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passert( _file.is_open() );
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if ( !_file.seekg( abs_offset, std::ios::beg ) )
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throw std::runtime_error( "BinaryFile::Seek('" + _filename + "') failed." );
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}
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void BinaryFile::ReadBuffer( void* buffer, std::streamsize length )
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{
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if ( !_file.read( reinterpret_cast<char*>( buffer ), length ) )
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throw std::runtime_error( "BinaryFile::Read('" + _filename + "') failed to read " +
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tostring( static_cast<int>( length ) ) + " bytes." );
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}
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std::fstream::pos_type BinaryFile::FileSize()
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{
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passert( _file.is_open() );
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std::fstream::pos_type save_pos = _file.tellg();
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if ( save_pos == std::fstream::pos_type( -1 ) )
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throw std::runtime_error( "BinaryFile::FileSize('" + _filename +
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"' failed to determine current position." );
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if ( !_file.seekg( 0, std::ios::end ) )
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throw std::runtime_error( "BinaryFile::FileSize('" + _filename +
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"') failed to seek to end of file." );
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std::fstream::pos_type size = _file.tellg();
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if ( size == std::fstream::pos_type( -1 ) )
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throw std::runtime_error( "BinaryFile::FileSize('" + _filename +
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"') could not determine file size." );
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if ( !_file.seekg( save_pos ) )
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throw std::runtime_error( "BinaryFile::FileSize('" + _filename +
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"') failed to seek to original position." );
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return size;
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}
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size_t BinaryFile::GetElementCount( size_t elemsize )
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{
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std::fstream::pos_type filesize = FileSize();
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if ( ( filesize % elemsize ) != 0 )
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{
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throw std::runtime_error( _filename +
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" does not contain an integral number of elements of size " +
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tostring( elemsize ) );
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}
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return static_cast<unsigned int>( filesize / elemsize );
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}
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size_t BinaryFile::sizeEstimate() const
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{
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size_t size = sizeof( *this ) + _filename.capacity();
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return size;
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}
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}
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}
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