[people/ms/u-boot.git] / include / search.h

/*
 * Declarations for System V style searching functions.
 * Copyright (C) 1995-1999, 2000 Free Software Foundation, Inc.
 * This file is part of the GNU C Library.
 *
 * The GNU C 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.
 *
 * The GNU C 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 the GNU C Library; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 * 02111-1307 USA.
 */

/*
 * Based on code from uClibc-0.9.30.3
 * Extensions for use within U-Boot
 * Copyright (C) 2010 Wolfgang Denk <wd@denx.de>
 */

#ifndef _SEARCH_H
#define	_SEARCH_H 1

#include <stddef.h>

#define __set_errno(val) do { errno = val; } while (0)

/* Action which shall be performed in the call the hsearch.  */
typedef enum {
	FIND,
	ENTER
} ACTION;

typedef struct entry {
	char *key;
	char *data;
} ENTRY;

/* Opaque type for internal use.  */
struct _ENTRY;

/*
 * Family of hash table handling functions.  The functions also
 * have reentrant counterparts ending with _r.  The non-reentrant
 * functions all work on a signle internal hashing table.
 */

/* Data type for reentrant functions.  */
struct hsearch_data {
	struct _ENTRY *table;
	unsigned int size;
	unsigned int filled;
};

/* Create a new hashing table which will at most contain NEL elements.  */
extern int hcreate_r(size_t __nel, struct hsearch_data *__htab);

/* Destroy current internal hashing table.  */
extern void hdestroy_r(struct hsearch_data *__htab);

/*
 * Search for entry matching ITEM.key in internal hash table.  If
 * ACTION is `FIND' return found entry or signal error by returning
 * NULL.  If ACTION is `ENTER' replace existing data (if any) with
 * ITEM.data.
 * */
extern int hsearch_r(ENTRY __item, ACTION __action, ENTRY ** __retval,
		     struct hsearch_data *__htab);

/*
 * Search for an entry matching `MATCH'.  Otherwise, Same semantics
 * as hsearch_r().
 */
extern int hmatch_r(const char *__match, int __last_idx, ENTRY ** __retval,
		    struct hsearch_data *__htab);

/* Search and delete entry matching ITEM.key in internal hash table. */
extern int hdelete_r(const char *__key, struct hsearch_data *__htab);

extern ssize_t hexport_r(struct hsearch_data *__htab,
		     const char __sep, char **__resp, size_t __size);

extern int himport_r(struct hsearch_data *__htab,
		     const char *__env, size_t __size, const char __sep,
		     int __flag);

/* Flags for himport_r() */
#define	H_NOCLEAR	1	/* do not clear hash table before importing */

#endif /* search.h */
Commit	Line	Data
a6826fbc WD	1	/*
	2	* Declarations for System V style searching functions.
	3	* Copyright (C) 1995-1999, 2000 Free Software Foundation, Inc.
	4	* This file is part of the GNU C Library.
	5	*
	6	* The GNU C Library is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2.1 of the License, or (at your option) any later version.
	10	*
	11	* The GNU C Library is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with the GNU C Library; if not, write to the Free
	18	* Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	19	* 02111-1307 USA.
	20	*/
	21
	22	/*
	23	* Based on code from uClibc-0.9.30.3
	24	* Extensions for use within U-Boot
	25	* Copyright (C) 2010 Wolfgang Denk <wd@denx.de>
	26	*/
	27
	28	#ifndef _SEARCH_H
	29	#define _SEARCH_H 1
	30
	31	#include <stddef.h>
	32
	33	#define __set_errno(val) do { errno = val; } while (0)
	34
a6826fbc WD	35	/* Action which shall be performed in the call the hsearch. */
	36	typedef enum {
	37	FIND,
	38	ENTER
	39	} ACTION;
	40
	41	typedef struct entry {
	42	char *key;
	43	char *data;
	44	} ENTRY;
	45
	46	/* Opaque type for internal use. */
	47	struct _ENTRY;
	48
	49	/*
	50	* Family of hash table handling functions. The functions also
	51	* have reentrant counterparts ending with _r. The non-reentrant
	52	* functions all work on a signle internal hashing table.
	53	*/
	54
	55	/* Data type for reentrant functions. */
	56	struct hsearch_data {
	57	struct _ENTRY *table;
	58	unsigned int size;
	59	unsigned int filled;
	60	};
	61
	62	/* Create a new hashing table which will at most contain NEL elements. */
a6826fbc WD	63	extern int hcreate_r(size_t __nel, struct hsearch_data *__htab);
	64
	65	/* Destroy current internal hashing table. */
a6826fbc WD	66	extern void hdestroy_r(struct hsearch_data *__htab);
	67
	68	/*
	69	* Search for entry matching ITEM.key in internal hash table. If
	70	* ACTION is `FIND' return found entry or signal error by returning
	71	* NULL. If ACTION is `ENTER' replace existing data (if any) with
	72	* ITEM.data.
	73	* */
a6826fbc WD	74	extern int hsearch_r(ENTRY __item, ACTION __action, ENTRY ** __retval,
	75	struct hsearch_data *__htab);
	76
560d424b MF	77	/*
	78	* Search for an entry matching `MATCH'. Otherwise, Same semantics
	79	* as hsearch_r().
	80	*/
	81	extern int hmatch_r(const char __match, int __last_idx, ENTRY * __retval,
	82	struct hsearch_data *__htab);
	83
a6826fbc	84	/* Search and delete entry matching ITEM.key in internal hash table. */
a6826fbc WD	85	extern int hdelete_r(const char __key, struct hsearch_data __htab);
a6826fbc WD	86
a6826fbc WD	87	extern ssize_t hexport_r(struct hsearch_data *__htab,
	88	const char __sep, char **__resp, size_t __size);
	89
a6826fbc WD	90	extern int himport_r(struct hsearch_data *__htab,
	91	const char *__env, size_t __size, const char __sep,
	92	int __flag);
	93
2eb1573f	94	/* Flags for himport_r() */
a6826fbc WD	95	#define H_NOCLEAR 1 /* do not clear hash table before importing */
	96
	97	#endif /* search.h */