guid_helper.h

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/* libIntegra modular audio framework
 *
 * Copyright (C) 2007 Birmingham City University
 *
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
 * USA.
 */

#ifndef INTEGRA_GUID_HELPER_H
#define INTEGRA_GUID_HELPER_H


#include <stdio.h>

#include "common_typedefs.h"
#include "error.h"


namespace integra_api
{
    class INTEGRA_API CGuidHelper
    {
        public:

            static size_t guid_to_hash( const GUID &guid );

            static string guid_to_string( const GUID &guid );

            static CError string_to_guid( const string &string, GUID &output );

            static bool guids_are_equal( const GUID &guid1, const GUID &guid2 );
        
            static bool guid_is_null( const GUID &guid );
        
            static const GUID null_guid;

        private:

            static unsigned long read_hex_chars( const string &input, unsigned int number_of_bytes, CError &error );
            static CError read_hex_char( char input, unsigned char &output );
    };


    struct GuidHash 
    {
        size_t operator()( const GUID &guid ) const { return CGuidHelper::guid_to_hash( guid ); }
    };

    struct GuidCompare
    {
        bool operator()( const GUID &guid1, const GUID &guid2 ) const { return CGuidHelper::guids_are_equal( guid1, guid2 ); }
    };

    typedef std::unordered_set<GUID, GuidHash, GuidCompare> guid_set;

    typedef std::vector<GUID> guid_array;
}





#endif