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

Rev	Author	Line No.	Line
3666	mejdrech	1	/*
		2	* Copyright (c) 2008 Lukas 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
		30	* @{
		31	*/
		32
		33	/**
		34	* @file
		35	*/
		36
		37	#ifndef __NET_INT_MAP_H__
		38	#define __NET_INT_MAP_H__
		39
		40	#include <errno.h>
		41	#include <malloc.h>
		42	#include <string.h>
		43
3846	mejdrech	44	#define INT_MAP_MAGIC_VALUE 0x11223344
3666	mejdrech	45	#define INT_MAP_ITEM_MAGIC_VALUE 0x55667788
		46
3846	mejdrech	47	#define INT_MAP_DECLARE( name, type ) \
		48	\
		49	typedef struct name name##_t; \
		50	typedef name##_t * name##_ref; \
		51	typedef struct name##_item name##_item_t; \
		52	typedef name##_item_t * name##_item_ref; \
		53	\
		54	struct name##_item{ \
		55	int key; \
		56	type * value; \
		57	int magic; \
		58	}; \
		59	\
		60	struct name{ \
		61	int size; \
		62	int next; \
		63	name##_item_ref items; \
		64	int magic; \
		65	}; \
		66	\
		67	int name##_add( name##_ref map, int key, type * value ); \
		68	void name##_clear( name##_ref map ); \
		69	int name##_count( name##_ref map ); \
		70	void name##_destroy( name##_ref map ); \
		71	void name##_exclude( name##_ref map, int key ); \
		72	void name##_exclude_index( name##_ref map, int index ); \
		73	type * name##_find( name##_ref map, int key ); \
		74	type * name##_get_index( name##_ref map, int index ); \
		75	int name##_initialize( name##_ref map ); \
		76	int name##_is_valid( name##_ref map ); \
		77	void name##_item_destroy( name##_item_ref item ); \
		78	int name##_item_is_valid( name##_item_ref item );
3666	mejdrech	79
3846	mejdrech	80	#define INT_MAP_IMPLEMENT( name, type ) \
		81	\
		82	int name##_add( name##_ref map, int key, type * value ){ \
		83	if( name##_is_valid( map )){ \
		84	if( map->next == ( map->size - 1 )){ \
		85	name##_item_ref tmp; \
		86	\
3666	mejdrech	87	tmp = ( name##_item_ref ) malloc( sizeof( name##_item_t ) * 2 * map->size ); \
3846	mejdrech	88	if( ! tmp ) return ENOMEM; \
		89	map->size *= 2; \
		90	memcpy( tmp, map->items, sizeof( name##_item_t ) * map->next ); \
		91	free( map->items ); \
		92	map->items = tmp; \
		93	} \
		94	map->items[ map->next ].key = key; \
		95	map->items[ map->next ].value = value; \
		96	map->items[ map->next ].magic = INT_MAP_ITEM_MAGIC_VALUE; \
		97	++ map->next; \
		98	map->items[ map->next ].magic = 0; \
		99	return map->next - 1; \
		100	} \
		101	return EINVAL; \
		102	} \
		103	\
		104	void name##_clear( name##_ref map ){ \
		105	if( name##_is_valid( map )){ \
		106	int index; \
		107	\
		108	/* map->magic = 0;*/ \
		109	for( index = 0; index < map->next; ++ index ){ \
		110	if( name##_item_is_valid( &( map->items[ index ] ))){ \
		111	name##_item_destroy( &( map->items[ index ] )); \
		112	} \
		113	} \
		114	map->next = 0; \
		115	map->items[ map->next ].magic = 0; \
		116	/* map->magic = INT_MAP_MAGIC_VALUE;*/ \
		117	} \
		118	} \
		119	\
		120	int name##_count( name##_ref map ){ \
		121	return name##_is_valid( map ) ? map->next : -1; \
		122	} \
		123	\
		124	void name##_destroy( name##_ref map ){ \
		125	if( name##_is_valid( map )){ \
		126	int index; \
		127	\
		128	map->magic = 0; \
		129	for( index = 0; index < map->next; ++ index ){ \
		130	if( name##_item_is_valid( &( map->items[ index ] ))){ \
		131	name##_item_destroy( &( map->items[ index ] )); \
		132	} \
		133	} \
		134	free( map->items ); \
		135	} \
		136	} \
		137	\
		138	void name##_exclude( name##_ref map, int key ){ \
		139	if( name##_is_valid( map )){ \
		140	int index; \
		141	\
		142	for( index = 0; index < map->next; ++ index ){ \
3666	mejdrech	143	if( name##_item_is_valid( &( map->items[ index ] )) && ( map->items[ index ].key == key )){ \
3846	mejdrech	144	name##_item_destroy( &( map->items[ index ] )); \
		145	} \
		146	} \
		147	} \
		148	} \
		149	\
		150	void name##_exclude_index( name##_ref map, int index ){ \
3666	mejdrech	151	if( name##_is_valid( map ) && ( index >= 0 ) && ( index < map->next ) && name##_item_is_valid( &( map->items[ index ] ))){ \
3846	mejdrech	152	name##_item_destroy( &( map->items[ index ] )); \
		153	} \
		154	} \
		155	\
		156	type * name##_find( name##_ref map, int key ){ \
		157	if( name##_is_valid( map )){ \
		158	int index; \
		159	\
		160	for( index = 0; index < map->next; ++ index ){ \
3666	mejdrech	161	if( name##_item_is_valid( &( map->items[ index ] )) && ( map->items[ index ].key == key )){ \
3846	mejdrech	162	return map->items[ index ].value; \
		163	} \
		164	} \
		165	} \
		166	return NULL; \
		167	} \
		168	\
		169	type * name##_get_index( name##_ref map, int index ){ \
3666	mejdrech	170	if( name##_is_valid( map ) && ( index >= 0 ) && ( index < map->next ) && name##_item_is_valid( &( map->items[ index ] ))){ \
3846	mejdrech	171	return map->items[ index ].value; \
		172	} \
		173	return NULL; \
		174	} \
		175	\
		176	int name##_initialize( name##_ref map ){ \
		177	if( ! map ) return EINVAL; \
		178	map->size = 2; \
		179	map->next = 0; \
3666	mejdrech	180	map->items = ( name##_item_ref ) malloc( sizeof( name##_item_t ) * map->size ); \
3846	mejdrech	181	if( ! map->items ) return ENOMEM; \
		182	map->items[ map->next ].magic = 0; \
		183	map->magic = INT_MAP_MAGIC_VALUE; \
		184	return EOK; \
		185	} \
		186	\
		187	int name##_is_valid( name##_ref map ){ \
		188	return map && ( map->magic == INT_MAP_MAGIC_VALUE ); \
		189	} \
		190	\
		191	void name##_item_destroy( name##_item_ref item ){ \
		192	if( name##_item_is_valid( item )){ \
		193	item->magic = 0; \
		194	if( item->value ){ \
		195	free( item->value ); \
		196	item->value = NULL; \
		197	} \
		198	} \
		199	} \
		200	\
		201	int name##_item_is_valid( name##_item_ref item ){ \
		202	return item && ( item->magic == INT_MAP_ITEM_MAGIC_VALUE ); \
3666	mejdrech	203	}
		204
		205	#endif
		206
		207	/** @}
		208	*/
		209

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