mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 23:10:06 +00:00
1be6ec3033
* misc/lsearch.c: New file. Implementation of lfind and lsearch functions. * misc/search.h: Add prototype for functions from tsearch family with __ prefix. Correct prototype for lsearch: BASE parameter must not be const. * misc/tsearch.c: prepend all global function names with __ and make normal names weak aliases. Fri Jun 7 00:15:24 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu> * Make-dist (sysdep_dirs): Skip CVS dirs.
148 lines
4.2 KiB
C
148 lines
4.2 KiB
C
/* search.h -- declarations for System V style searching functions.
|
|
Copyright (C) 1995, 1996 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#ifndef _SEARCH_H
|
|
#define _SEARCH_H 1
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
#define __need_size_t
|
|
#define __need_NULL
|
|
#include <stddef.h>
|
|
|
|
__BEGIN_DECLS
|
|
|
|
/* Prototype structure for a linked-list data structure.
|
|
This is the type used by the `insque' and `remque' functions. */
|
|
|
|
struct qelem
|
|
{
|
|
struct qelem *q_forw;
|
|
struct qelem *q_back;
|
|
char q_data[1];
|
|
};
|
|
|
|
|
|
/* Insert ELEM into a doubly-linked list, after PREV. */
|
|
extern void insque __P ((struct qelem *__elem, struct qelem *__prev));
|
|
|
|
/* Unlink ELEM from the doubly-linked list that it is in. */
|
|
extern void remque __P ((struct qelem *__elem));
|
|
|
|
|
|
/* For use with hsearch(3). */
|
|
#ifndef __COMPAR_FN_T
|
|
#define __COMPAR_FN_T
|
|
typedef int (*__compar_fn_t) __P ((__const __ptr_t, __const __ptr_t));
|
|
#endif
|
|
|
|
/* 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;
|
|
|
|
/* Data type for reentrent functions. */
|
|
struct hsearch_data
|
|
{
|
|
struct _ENTRY *table;
|
|
unsigned int size;
|
|
unsigned int filled;
|
|
};
|
|
|
|
/* Family of hash table handling functions. The functions also have
|
|
reentrent counterparts ending with _r. */
|
|
extern ENTRY *hsearch __P ((ENTRY __item, ACTION __action));
|
|
extern int hcreate __P ((unsigned int __nel));
|
|
extern void hdestroy __P ((void));
|
|
|
|
extern int hsearch_r __P ((ENTRY __item, ACTION __action, ENTRY **__retval,
|
|
struct hsearch_data *__htab));
|
|
extern int hcreate_r __P ((unsigned int __nel, struct hsearch_data *htab));
|
|
extern void hdestroy_r __P ((struct hsearch_data *htab));
|
|
|
|
|
|
/* The tsearch routines are very interesting. They make many
|
|
assumptions about the compiler. It assumpts that the first field
|
|
in node must be the "key" field, which points to the datum.
|
|
Everything depends on that. */
|
|
/* For tsearch */
|
|
typedef enum
|
|
{
|
|
preorder,
|
|
postorder,
|
|
endorder,
|
|
leaf
|
|
}
|
|
VISIT;
|
|
|
|
extern void *tsearch __P ((__const void * __key, void **__rootp,
|
|
__compar_fn_t compar));
|
|
extern void *__tsearch __P ((__const void * __key, void **__rootp,
|
|
__compar_fn_t compar));
|
|
|
|
extern void *tfind __P ((__const void * __key, __const void ** __rootp,
|
|
__compar_fn_t compar));
|
|
extern void *__tfind __P ((__const void * __key, __const void ** __rootp,
|
|
__compar_fn_t compar));
|
|
|
|
extern void *tdelete __P ((__const void * __key, void ** __rootp,
|
|
__compar_fn_t compar));
|
|
extern void *__tdelete __P ((__const void * __key, void ** __rootp,
|
|
__compar_fn_t compar));
|
|
|
|
#ifndef __ACTION_FN_T
|
|
#define __ACTION_FN_T
|
|
typedef void (*__action_fn_t) __P ((__const void *__nodep,
|
|
__const VISIT __value,
|
|
__const int __level));
|
|
#endif
|
|
|
|
extern void twalk __P ((__const void * __root, __action_fn_t action));
|
|
|
|
extern void __twalk __P ((__const void * __root, __action_fn_t action));
|
|
|
|
|
|
/* Perform linear search for KEY by comparing by COMPAR in an array
|
|
[BASE,BASE+NMEMB*SIZE). */
|
|
extern void * lfind __P ((__const void *__key, __const void *__base,
|
|
size_t *__nmemb, size_t __size,
|
|
__compar_fn_t __compar));
|
|
|
|
/* Perform linear search for KEY by comparing by COMPAR function in
|
|
array [BASE,BASE+NMEMB*SIZE) and insert entry if not found. */
|
|
extern void * lsearch __P ((__const void *__key, void *__base, size_t *__nmemb,
|
|
size_t __size, __compar_fn_t __compar));
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* search.h */
|