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/*
CVariant 1.0
Copyright (C) 2009  Martin Peres <martin dot peres at ensi-bourges dot fr
Contributors: Denis Martinez

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library 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
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

#ifndef _CVARIANT_H_
#define _CVARIANT_H_

#include <sys/types.h>

#ifdef __cplusplus 
extern "C"
{
#endif

        //Definitions
        typedef enum
        {
                cvariant_none=0,
                cvariant_string,
                cvariant_int,
                cvariant_float
        } cvariant_type;
        
        typedef struct
        {
                cvariant_type type;
                int to_free;
                union
                {
                        const char* string;
                        int int_value;
                        double float_value;
                };
        } cvariant;
        
        #define CVARIANT_EMPTY_STRING NULL
        #define CVARIANT_EMPTY_INT 0
        #define CVARIANT_EMPTY_FLOAT 0.0
        
        //Setters
        cvariant cvariant_null();
        
        cvariant cvariant_from_string(const char* string);
        
        cvariant cvariant_from_string_copy(const char* string, size_t n);
        
        cvariant cvariant_from_int(int value);
        
        cvariant cvariant_from_float(double value);
        
        //Getters
        int cvariant_not_null(cvariant cv);
        
        cvariant_type cvariant_get_type(cvariant cv);
        

        const char* cvariant_get_string(cvariant cv);
        
        int cvariant_get_int(cvariant cv);
        
        double cvariant_get_float(cvariant cv);

        //Comparaison
        int cvariant_compare(cvariant a, cvariant b);
        
        void cvariant_free(cvariant cv);

#ifdef __cplusplus 
}
#endif
#endif

---