#include "FileRewindInputStream.hpp"

#include <stdexcept>

using namespace std;

FileRewindInputStream::FileRewindInputStream( const URL &url )
	: RewindInputStream( url ), ifstream( )
{
	if( url.protocol( ) != "file" || url.host( ) != "localhost" ) {
		throw new runtime_error( "URL doesn't denote a local file" );
	}
	
	open( url.path( ).c_str( ), ios::binary );
}

FileRewindInputStream::~FileRewindInputStream( )
{
	close( );
}

void FileRewindInputStream::rewind( )
{
	ifstream::clear( );
	ifstream::seekg( 0, ios::beg );
}

string FileRewindInputStream::lastErrMsg( ) const
{
	// TODO: tricky to get OS-indepented error messages here
	return "<TODO>";
}