mirror of https://github.com/vitalif/grive2
140 lines
3.0 KiB
C++
140 lines
3.0 KiB
C++
/*
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grive: an GPL program to sync a local directory with Google Drive
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Copyright (C) 2012 Wan Wai Ho
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation version 2
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of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "StdioFile.hh"
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#include <cassert>
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// boost headers
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#include <boost/throw_exception.hpp>
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#include <boost/exception/errinfo_api_function.hpp>
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#include <boost/exception/errinfo_at_line.hpp>
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#include <boost/exception/errinfo_errno.hpp>
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#include <boost/exception/errinfo_file_name.hpp>
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#include <boost/exception/errinfo_file_open_mode.hpp>
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#include <boost/exception/info.hpp>
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#include <sys/stat.h>
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namespace gr {
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StdioFile::StdioFile( const std::string& filename, const char *mode ) : m_file( 0 )
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{
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Open( filename, mode ) ;
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}
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StdioFile::StdioFile( const fs::path& path, const char *mode ) : m_file( 0 )
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{
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Open( path, mode ) ;
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}
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StdioFile::~StdioFile( )
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{
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Close() ;
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}
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void StdioFile::Open( const std::string& filename, const char *mode )
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{
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if ( IsOpened() )
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Close() ;
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assert( m_file == 0 ) ;
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m_file = std::fopen( filename.c_str(), mode ) ;
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if ( m_file == 0 )
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{
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BOOST_THROW_EXCEPTION(
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Error()
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<< boost::errinfo_api_function("fopen")
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<< boost::errinfo_errno(errno)
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<< boost::errinfo_file_name(filename)
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<< boost::errinfo_file_open_mode(mode)
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) ;
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}
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}
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void StdioFile::Open( const fs::path& path, const char *mode )
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{
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Open( path.string(), mode ) ;
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}
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void StdioFile::Close()
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{
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if ( IsOpened() )
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{
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std::fclose( m_file ) ;
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m_file = 0 ;
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}
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}
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bool StdioFile::IsOpened() const
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{
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return m_file != 0 ;
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}
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std::size_t StdioFile::Read( void *ptr, std::size_t size )
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{
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assert( m_file != 0 ) ;
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return std::fread( ptr, 1, size, m_file ) ;
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}
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std::size_t StdioFile::Write( const void *ptr, std::size_t size )
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{
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assert( m_file != 0 ) ;
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return std::fwrite( ptr, 1, size, m_file ) ;
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}
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int StdioFile::Seek( long offset, int whence )
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{
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assert( m_file != 0 ) ;
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return std::fseek( m_file, offset, whence ) ;
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}
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long StdioFile::Tell() const
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{
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assert( m_file != 0 ) ;
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return std::ftell( m_file ) ;
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}
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void StdioFile::Chmod( int mode )
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{
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assert( m_file != 0 ) ;
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int fd = ::fileno(m_file) ;
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if ( fd == -1 )
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{
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BOOST_THROW_EXCEPTION(
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Error()
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<< boost::errinfo_api_function("fileno")
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<< boost::errinfo_errno(errno)
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) ;
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}
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if ( ::fchmod( fd, mode ) != 0 )
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{
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BOOST_THROW_EXCEPTION(
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Error()
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<< boost::errinfo_api_function("fchmod")
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<< boost::errinfo_errno(errno)
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) ;
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}
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}
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} // end of namespace
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