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.
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.
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.
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
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>
33 #define __set_errno(val) do { errno = val; } while (0)
36 * Prototype structure for a linked-list data structure.
37 * This is the type used by the `insque' and `remque' functions.
40 /* For use with hsearch(3). */
41 typedef int (*__compar_fn_t) (__const void *, __const void *);
42 typedef __compar_fn_t comparison_fn_t;
44 /* Action which shall be performed in the call the hsearch. */
50 typedef struct entry {
55 /* Opaque type for internal use. */
59 * Family of hash table handling functions. The functions also
60 * have reentrant counterparts ending with _r. The non-reentrant
61 * functions all work on a signle internal hashing table.
64 /* Data type for reentrant functions. */
71 /* Create a new hashing table which will at most contain NEL elements. */
72 extern int hcreate(size_t __nel);
73 extern int hcreate_r(size_t __nel, struct hsearch_data *__htab);
75 /* Destroy current internal hashing table. */
76 extern void hdestroy(void);
77 extern void hdestroy_r(struct hsearch_data *__htab);
80 * Search for entry matching ITEM.key in internal hash table. If
81 * ACTION is `FIND' return found entry or signal error by returning
82 * NULL. If ACTION is `ENTER' replace existing data (if any) with
85 extern ENTRY *hsearch(ENTRY __item, ACTION __action);
86 extern int hsearch_r(ENTRY __item, ACTION __action, ENTRY ** __retval,
87 struct hsearch_data *__htab);
89 /* Search and delete entry matching ITEM.key in internal hash table. */
90 extern int hdelete(const char *__key);
91 extern int hdelete_r(const char *__key, struct hsearch_data *__htab);
93 extern ssize_t hexport(const char __sep, char **__resp, size_t __size);
94 extern ssize_t hexport_r(struct hsearch_data *__htab,
95 const char __sep, char **__resp, size_t __size);
97 extern int himport(const char *__env, size_t __size, const char __sep,
99 extern int himport_r(struct hsearch_data *__htab,
100 const char *__env, size_t __size, const char __sep,
103 /* Flags for himport() / himport_r() */
104 #define H_NOCLEAR 1 /* do not clear hash table before importing */
106 #endif /* search.h */