WebSVN – HelenOS – Blame – /branches/network/uspace/srv/net/structures/int_map.h/

Rev	Author	Line No.	Line
3666	mejdrech	1	/*
3912	mejdrech	2	* Copyright (c) 2009 Lukas Mejdrech
3666	mejdrech	3	* All rights reserved.
		4	*
		5	* Redistribution and use in source and binary forms, with or without
		6	* modification, are permitted provided that the following conditions
		7	* are met:
		8	*
		9	* - Redistributions of source code must retain the above copyright
		10	* notice, this list of conditions and the following disclaimer.
		11	* - Redistributions in binary form must reproduce the above copyright
		12	* notice, this list of conditions and the following disclaimer in the
		13	* documentation and/or other materials provided with the distribution.
		14	* - The name of the author may not be used to endorse or promote products
		15	* derived from this software without specific prior written permission.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
		18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
		19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
		20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
		21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
		22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
		26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*/
		28
		29	/** @addtogroup net
3912	mejdrech	30	* @{
3666	mejdrech	31	*/
		32
3912	mejdrech	33	/** @file
3666	mejdrech	34	*/
		35
		36	#ifndef __NET_INT_MAP_H__
		37	#define __NET_INT_MAP_H__
		38
		39	#include <errno.h>
		40	#include <malloc.h>
		41	#include <string.h>
		42
3846	mejdrech	43	#define INT_MAP_MAGIC_VALUE 0x11223344
3666	mejdrech	44	#define INT_MAP_ITEM_MAGIC_VALUE 0x55667788
		45
3846	mejdrech	46	#define INT_MAP_DECLARE( name, type ) \
		47	\
		48	typedef struct name name##_t; \
		49	typedef name##_t * name##_ref; \
		50	typedef struct name##_item name##_item_t; \
		51	typedef name##_item_t * name##_item_ref; \
		52	\
		53	struct name##_item{ \
		54	int key; \
		55	type * value; \
		56	int magic; \
		57	}; \
		58	\
		59	struct name{ \
		60	int size; \
		61	int next; \
		62	name##_item_ref items; \
		63	int magic; \
		64	}; \
		65	\
		66	int name##_add( name##_ref map, int key, type * value ); \
		67	void name##_clear( name##_ref map ); \
		68	int name##_count( name##_ref map ); \
		69	void name##_destroy( name##_ref map ); \
		70	void name##_exclude( name##_ref map, int key ); \
		71	void name##_exclude_index( name##_ref map, int index ); \
		72	type * name##_find( name##_ref map, int key ); \
		73	type * name##_get_index( name##_ref map, int index ); \
		74	int name##_initialize( name##_ref map ); \
		75	int name##_is_valid( name##_ref map ); \
		76	void name##_item_destroy( name##_item_ref item ); \
		77	int name##_item_is_valid( name##_item_ref item );
3666	mejdrech	78
3846	mejdrech	79	#define INT_MAP_IMPLEMENT( name, type ) \
		80	\
		81	int name##_add( name##_ref map, int key, type * value ){ \
		82	if( name##_is_valid( map )){ \
		83	if( map->next == ( map->size - 1 )){ \
		84	name##_item_ref tmp; \
		85	\
3666	mejdrech	86	tmp = ( name##_item_ref ) malloc( sizeof( name##_item_t ) * 2 * map->size ); \
3846	mejdrech	87	if( ! tmp ) return ENOMEM; \
		88	map->size *= 2; \
		89	memcpy( tmp, map->items, sizeof( name##_item_t ) * map->next ); \
		90	free( map->items ); \
		91	map->items = tmp; \
		92	} \
		93	map->items[ map->next ].key = key; \
		94	map->items[ map->next ].value = value; \
		95	map->items[ map->next ].magic = INT_MAP_ITEM_MAGIC_VALUE; \
		96	++ map->next; \
		97	map->items[ map->next ].magic = 0; \
		98	return map->next - 1; \
		99	} \
		100	return EINVAL; \
		101	} \
		102	\
		103	void name##_clear( name##_ref map ){ \
		104	if( name##_is_valid( map )){ \
		105	int index; \
		106	\
		107	/* map->magic = 0;*/ \
		108	for( index = 0; index < map->next; ++ index ){ \
		109	if( name##_item_is_valid( &( map->items[ index ] ))){ \
		110	name##_item_destroy( &( map->items[ index ] )); \
		111	} \
		112	} \
		113	map->next = 0; \
		114	map->items[ map->next ].magic = 0; \
		115	/* map->magic = INT_MAP_MAGIC_VALUE;*/ \
		116	} \
		117	} \
		118	\
		119	int name##_count( name##_ref map ){ \
		120	return name##_is_valid( map ) ? map->next : -1; \
		121	} \
		122	\
		123	void name##_destroy( name##_ref map ){ \
		124	if( name##_is_valid( map )){ \
		125	int index; \
		126	\
		127	map->magic = 0; \
		128	for( index = 0; index < map->next; ++ index ){ \
		129	if( name##_item_is_valid( &( map->items[ index ] ))){ \
		130	name##_item_destroy( &( map->items[ index ] )); \
		131	} \
		132	} \
		133	free( map->items ); \
		134	} \
		135	} \
		136	\
		137	void name##_exclude( name##_ref map, int key ){ \
		138	if( name##_is_valid( map )){ \
		139	int index; \
		140	\
		141	for( index = 0; index < map->next; ++ index ){ \
3666	mejdrech	142	if( name##_item_is_valid( &( map->items[ index ] )) && ( map->items[ index ].key == key )){ \
3846	mejdrech	143	name##_item_destroy( &( map->items[ index ] )); \
		144	} \
		145	} \
		146	} \
		147	} \
		148	\
		149	void name##_exclude_index( name##_ref map, int index ){ \
3666	mejdrech	150	if( name##_is_valid( map ) && ( index >= 0 ) && ( index < map->next ) && name##_item_is_valid( &( map->items[ index ] ))){ \
3846	mejdrech	151	name##_item_destroy( &( map->items[ index ] )); \
		152	} \
		153	} \
		154	\
		155	type * name##_find( name##_ref map, int key ){ \
		156	if( name##_is_valid( map )){ \
		157	int index; \
		158	\
		159	for( index = 0; index < map->next; ++ index ){ \
3666	mejdrech	160	if( name##_item_is_valid( &( map->items[ index ] )) && ( map->items[ index ].key == key )){ \
3846	mejdrech	161	return map->items[ index ].value; \
		162	} \
		163	} \
		164	} \
		165	return NULL; \
		166	} \
		167	\
		168	type * name##_get_index( name##_ref map, int index ){ \
3666	mejdrech	169	if( name##_is_valid( map ) && ( index >= 0 ) && ( index < map->next ) && name##_item_is_valid( &( map->items[ index ] ))){ \
3846	mejdrech	170	return map->items[ index ].value; \
		171	} \
		172	return NULL; \
		173	} \
		174	\
		175	int name##_initialize( name##_ref map ){ \
		176	if( ! map ) return EINVAL; \
		177	map->size = 2; \
		178	map->next = 0; \
3666	mejdrech	179	map->items = ( name##_item_ref ) malloc( sizeof( name##_item_t ) * map->size ); \
3846	mejdrech	180	if( ! map->items ) return ENOMEM; \
		181	map->items[ map->next ].magic = 0; \
		182	map->magic = INT_MAP_MAGIC_VALUE; \
		183	return EOK; \
		184	} \
		185	\
		186	int name##_is_valid( name##_ref map ){ \
		187	return map && ( map->magic == INT_MAP_MAGIC_VALUE ); \
		188	} \
		189	\
		190	void name##_item_destroy( name##_item_ref item ){ \
		191	if( name##_item_is_valid( item )){ \
		192	item->magic = 0; \
		193	if( item->value ){ \
		194	free( item->value ); \
		195	item->value = NULL; \
		196	} \
		197	} \
		198	} \
		199	\
		200	int name##_item_is_valid( name##_item_ref item ){ \
		201	return item && ( item->magic == INT_MAP_ITEM_MAGIC_VALUE ); \
3666	mejdrech	202	}
		203
		204	#endif
		205
		206	/** @}
		207	*/
		208

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