1 /* search.h -- declarations for System V style searching functions.
2 Copyright (C) 1995, 1996 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If
17 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
23 #include <sys/cdefs.h>
31 /* Prototype structure for a linked-list data structure.
32 This is the type used by the `insque' and `remque' functions. */
42 /* Insert ELEM into a doubly-linked list, after PREV. */
43 extern void insque __P ((struct qelem *__elem, struct qelem *__prev));
45 /* Unlink ELEM from the doubly-linked list that it is in. */
46 extern void remque __P ((struct qelem *__elem));
49 /* For use with hsearch(3). */
52 typedef int (*__compar_fn_t) __P ((__const __ptr_t, __const __ptr_t));
55 /* Action which shall be performed in the call the hsearch. */
70 /* Opaque type for internal use. */
73 /* Data type for reentrent functions. */
81 /* Family of hash table handling functions. The functions also have
82 reentrent counterparts ending with _r. */
83 extern ENTRY *hsearch __P ((ENTRY __item, ACTION __action));
84 extern int hcreate __P ((unsigned int __nel));
85 extern void hdestroy __P ((void));
87 extern int hsearch_r __P ((ENTRY __item, ACTION __action, ENTRY **__retval,
88 struct hsearch_data *__htab));
89 extern int hcreate_r __P ((unsigned int __nel, struct hsearch_data *htab));
90 extern void hdestroy_r __P ((struct hsearch_data *htab));
93 /* The tsearch routines are very interesting. They make many
94 assumptions about the compiler. It assumpts that the first field
95 in node must be the "key" field, which points to the datum.
96 Everything depends on that. */
107 extern void *tsearch __P ((__const void * __key, void **__rootp,
108 __compar_fn_t compar));
109 extern void *__tsearch __P ((__const void * __key, void **__rootp,
110 __compar_fn_t compar));
112 extern void *tfind __P ((__const void * __key, __const void ** __rootp,
113 __compar_fn_t compar));
114 extern void *__tfind __P ((__const void * __key, __const void ** __rootp,
115 __compar_fn_t compar));
117 extern void *tdelete __P ((__const void * __key, void ** __rootp,
118 __compar_fn_t compar));
119 extern void *__tdelete __P ((__const void * __key, void ** __rootp,
120 __compar_fn_t compar));
122 #ifndef __ACTION_FN_T
123 #define __ACTION_FN_T
124 typedef void (*__action_fn_t) __P ((__const void *__nodep,
125 __const VISIT __value,
126 __const int __level));
129 extern void twalk __P ((__const void * __root, __action_fn_t action));
131 extern void __twalk __P ((__const void * __root, __action_fn_t action));
134 /* Perform linear search for KEY by comparing by COMPAR in an array
135 [BASE,BASE+NMEMB*SIZE). */
136 extern void * lfind __P ((__const void *__key, __const void *__base,
137 size_t *__nmemb, size_t __size,
138 __compar_fn_t __compar));
140 /* Perform linear search for KEY by comparing by COMPAR function in
141 array [BASE,BASE+NMEMB*SIZE) and insert entry if not found. */
142 extern void * lsearch __P ((__const void *__key, void *__base, size_t *__nmemb,
143 size_t __size, __compar_fn_t __compar));
147 #endif /* search.h */