io_utils.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2023 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 "io_utils.h"
 
#include <wx/wfstream.h>
#include <wx/txtstrm.h>
 
namespace IO_UTILS
{
 
bool fileStartsWithPrefix( const wxString& aFilePath, const wxString& aPrefix,
 bool aIgnoreWhitespace )
{
 wxFFileInputStream input( aFilePath );
 
 if( input.IsOk() && !input.Eof() )
 {
 // Find first non-empty line
 wxTextInputStream text( input );
 wxString line = text.ReadLine();
 
 if( aIgnoreWhitespace )
 {
 while( !input.Eof() && line.IsEmpty() )
 line = text.ReadLine().Trim( false /*trim from left*/ );
 }
 
 if( line.StartsWith( aPrefix ) )
 return true;
 }
 
 return false;
}
 
 
bool fileStartsWithBinaryHeader( const wxString& aFilePath, const std::vector<uint8_t>& aHeader )
{
 wxFFileInputStream input( aFilePath );
 
 if( input.IsOk() && !input.Eof() )
 {
 if( static_cast<size_t>( input.GetLength() ) < aHeader.size() )
 return false;
 
 std::vector<uint8_t> parsedHeader( aHeader.size() );
 
 if( !input.ReadAll( parsedHeader.data(), parsedHeader.size() ) )
 return false;
 
 return parsedHeader == aHeader;
 }
 
 return false;
}
 
}