kicad/tools/io_benchmark/stdstream_line_reader.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2017 KiCad Developers, see AUTHORS.txt for contributors.
*
* 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 the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* 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. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "stdstream_line_reader.h"
#include <ios>
STDISTREAM_LINE_READER::STDISTREAM_LINE_READER() :
LINE_READER( 0 ),
m_stream( nullptr )
{
line = nullptr;
lineNum = 0;
}
STDISTREAM_LINE_READER::~STDISTREAM_LINE_READER()
{
// this is only a view into a string, it cant be deleted by the base
line = nullptr;
}
char* STDISTREAM_LINE_READER::ReadLine() throw( IO_ERROR )
{
getline( *m_stream, m_buffer );
m_buffer.append( 1, '\n' );
length = m_buffer.size();
line = (char*) m_buffer.data(); //ew why no const??
// lineNum is incremented even if there was no line read, because this
// leads to better error reporting when we hit an end of file.
++lineNum;
return m_stream->eof() ? nullptr : line;
}
void STDISTREAM_LINE_READER::setStream( std::istream& aStream )
{
// Could be done with a virtual getStream function, but the
// virtual function call is a noticable (but minor) penalty within
// ReadLine() in tight loops
m_stream = &aStream;
}
IFSTREAM_LINE_READER::IFSTREAM_LINE_READER( const wxFileName& aFileName ) throw( IO_ERROR ) :
m_fStream( aFileName.GetFullName().ToUTF8() )
{
if( !m_fStream.is_open() )
{
wxString msg = wxString::Format(
_( "Unable to open filename '%s' for reading" ), aFileName.GetFullPath().GetData() );
THROW_IO_ERROR( msg );
}
setStream( m_fStream );
source = aFileName.GetFullName();
}
void IFSTREAM_LINE_READER::Rewind()
{
m_fStream.clear() ;
m_fStream.seekg(0, std::ios::beg );
}