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/*
* 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)
/*
* Prototype structure for a linked-list data structure.
* This is the type used by the `insque' and `remque' functions.
*/
/* For use with hsearch(3). */
typedef int (*__compar_fn_t) (__const void *, __const void *);
typedef __compar_fn_t comparison_fn_t;
/* 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(size_t __nel);
extern int hcreate_r(size_t __nel, struct hsearch_data *__htab);
/* Destroy current internal hashing table. */
extern void hdestroy(void);
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 ENTRY *hsearch(ENTRY __item, ACTION __action);
extern int hsearch_r(ENTRY __item, ACTION __action, ENTRY ** __retval,
struct hsearch_data *__htab);
/* Search and delete entry matching ITEM.key in internal hash table. */
extern int hdelete(const char *__key);
extern int hdelete_r(const char *__key, struct hsearch_data *__htab);
extern ssize_t hexport(const char __sep, char **__resp, size_t __size);
extern ssize_t hexport_r(struct hsearch_data *__htab,
const char __sep, char **__resp, size_t __size);
extern int himport(const char *__env, size_t __size, const char __sep,
int __flag);
extern int himport_r(struct hsearch_data *__htab,
const char *__env, size_t __size, const char __sep,
int __flag);
/* Flags for himport() / himport_r() */
#define H_NOCLEAR 1 /* do not clear hash table before importing */
#endif /* search.h */
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