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/*
* This file is part of the MLV Library.
*
* Copyright (C) 2012 Adrien Boussicault, Marc Zipstein
*
*
* This Library 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 3 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this Library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "key.h"
#include "warning_error.h"
#include "memory_management.h"
#include <string.h>
struct _MLV_Key {
void* value;
void (* value_destroying_function )( void* value );
int (* compare_values )( void* value1, void* value2 );
};
MLV_Key* MLV_create_key(
void* value,
void (* value_destroying_function )( void* data ),
int (* compare_values )( void* value1, void* value2 )
){
MLV_Key* key = MLV_MALLOC( 1, MLV_Key );
key->value = value;
key->value_destroying_function = value_destroying_function;
key->compare_values = compare_values;
return key;
}
void MLV_free_key( MLV_Key* key ){
if( key ){
if( key->value_destroying_function ){
key->value_destroying_function( key->value );
}
MLV_FREE( key, MLV_Key );
}
}
int MLV_compare_keys( MLV_Key* key1, MLV_Key* key2 ){
return key1->compare_values( key1->value, key2->value );
}
void free_string( char* text ){
MLV_FREE( text, char );
}
int compare_strings( char* text1, char* text2 ){
return strcmp( text1, text2 );
}
MLV_Key* MLV_string_to_key( const char* text ){
size_t l = strlen( text );
char* text_copy = MLV_MALLOC( ( l + 1 ), char );
strncpy( text_copy, text, l+1);
return MLV_create_key(
text_copy,
( void (*)( void* ) ) free_string,
( int (*)( void*, void* ) ) compare_strings
);
}
void free_integer( int* integer ){
MLV_FREE( integer, int );
}
int compare_integers( int* int1, int* int2 ){
return (*int1) - (*int2);
}
MLV_Key* MLV_integer_to_key( int integer ){
int* value = MLV_MALLOC( 1, int );
*value = integer;
return MLV_create_key(
value,
( void (*)( void* ) ) free_integer,
(int (*)( void*, void* )) compare_integers
);
}
void* MLV_get_value_from_key( MLV_Key* key ){
return key->value;
}
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