/*
* Copyright (c) 2008 Lukas Mejdrech
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup net
* @{
*/
/**
* @file
*/
#ifndef __NET_INT_MAP_H__
#define __NET_INT_MAP_H__
#include <errno.h>
#include <malloc.h>
#include <string.h>
#define INT_MAP_MAGIC_VALUE 0x11223344
#define INT_MAP_ITEM_MAGIC_VALUE 0x55667788
#define INT_MAP_DECLARE( name, type ) \
\
typedef struct name name##_t; \
typedef name##_t * name##_ref; \
typedef struct name##_item name##_item_t; \
typedef name##_item_t * name##_item_ref; \
\
struct name##_item{ \
int key; \
type * value; \
int magic; \
}; \
\
struct name{ \
int size; \
int next; \
name##_item_ref items; \
int magic; \
}; \
\
int name##_add( name##_ref map, int key, type * value ); \
int name##_count( name##_ref map ); \
void name##_destroy( name##_ref map ); \
void name##_exclude( name##_ref map, int key ); \
void name##_exclude_index( name##_ref map, int index ); \
type * name##_find( name##_ref map, int key ); \
type * name##_get_index( name##_ref map, int index ); \
int name##_initialize( name##_ref map ); \
int name##_is_valid( name##_ref map ); \
void name##_item_destroy( name##_item_ref item ); \
int name##_item_is_valid( name##_item_ref item );
#define INT_MAP_IMPLEMENT( name, type ) \
\
int name##_add( name##_ref map, int key, type * value ){ \
if( name##_is_valid( map )){ \
if( map->next == ( map->size - 1 )){ \
name##_item_ref tmp; \
\
tmp = ( name##_item_ref ) malloc( sizeof( name##_item_t ) * 2 * map->size ); \
if( ! tmp ) return ENOMEM; \
map->size *= 2; \
memcpy( tmp, map->items, sizeof( name##_item_t ) * map->next ); \
free( map->items ); \
map->items = tmp; \
} \
map->items[ map->next ].key = key; \
map->items[ map->next ].value = value; \
map->items[ map->next ].magic = INT_MAP_ITEM_MAGIC_VALUE; \
++ map->next; \
map->items[ map->next ].magic = 0; \
return map->next - 1; \
} \
return EINVAL; \
} \
\
int name##_count( name##_ref map ){ \
return name##_is_valid( map ) ? map->next : -1; \
} \
\
void name##_destroy( name##_ref map ){ \
if( name##_is_valid( map )){ \
int index; \
\
map->magic = 0; \
for( index = 0; index < map->next; ++ index ){ \
if( name##_item_is_valid( &( map->items[ index ] ))){ \
name##_item_destroy( &( map->items[ index ] )); \
} \
} \
free( map->items ); \
} \
} \
\
void name##_exclude( name##_ref map, int key ){ \
if( name##_is_valid( map )){ \
int index; \
\
for( index = 0; index < map->next; ++ index ){ \
if( name##_item_is_valid( &( map->items[ index ] )) && ( map->items[ index ].key == key )){ \
name##_item_destroy( &( map->items[ index ] )); \
} \
} \
} \
} \
\
void name##_exclude_index( name##_ref map, int index ){ \
if( name##_is_valid( map ) && ( index >= 0 ) && ( index < map->next ) && name##_item_is_valid( &( map->items[ index ] ))){ \
name##_item_destroy( &( map->items[ index ] )); \
} \
} \
\
type * name##_find( name##_ref map, int key ){ \
if( name##_is_valid( map )){ \
int index; \
\
for( index = 0; index < map->next; ++ index ){ \
if( name##_item_is_valid( &( map->items[ index ] )) && ( map->items[ index ].key == key )){ \
return map->items[ index ].value; \
} \
} \
} \
return NULL; \
} \
\
type * name##_get_index( name##_ref map, int index ){ \
if( name##_is_valid( map ) && ( index >= 0 ) && ( index < map->next ) && name##_item_is_valid( &( map->items[ index ] ))){ \
return map->items[ index ].value; \
} \
return NULL; \
} \
\
int name##_initialize( name##_ref map ){ \
if( ! map ) return EINVAL; \
map->size = 2; \
map->next = 0; \
map->items = ( name##_item_ref ) malloc( sizeof( name##_item_t ) * map->size ); \
if( ! map->items ) return ENOMEM; \
map->items[ map->next ].magic = 0; \
map->magic = INT_MAP_MAGIC_VALUE; \
return EOK; \
} \
\
int name##_is_valid( name##_ref map ){ \
return map && ( map->magic == INT_MAP_MAGIC_VALUE ); \
} \
\
void name##_item_destroy( name##_item_ref item ){ \
if( name##_item_is_valid( item )){ \
item->magic = 0; \
if( item->value ){ \
free( item->value ); \
item->value = NULL; \
} \
} \
} \
\
int name##_item_is_valid( name##_item_ref item ){ \
return item && ( item->magic == INT_MAP_ITEM_MAGIC_VALUE ); \
}
#endif
/** @}
*/