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/*
* Copyright (c) 1997 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* hash.h. Header file for hash table functions
*/
/* $KTH: hash.h,v 1.3 1999/12/02 17:05:02 joda Exp $ */
struct hashentry { /* Entry in bucket */
struct hashentry **prev;
struct hashentry *next;
void *ptr;
};
typedef struct hashentry Hashentry;
struct hashtab { /* Hash table */
int (*cmp)(void *, void *); /* Compare function */
unsigned (*hash)(void *); /* hash function */
int sz; /* Size */
Hashentry *tab[1]; /* The table */
};
typedef struct hashtab Hashtab;
/* prototypes */
Hashtab *hashtabnew(int sz,
int (*cmp)(void *, void *),
unsigned (*hash)(void *)); /* Make new hash table */
void *hashtabsearch(Hashtab *htab, /* The hash table */
void *ptr); /* The key */
void *hashtabadd(Hashtab *htab, /* The hash table */
void *ptr); /* The element */
int _hashtabdel(Hashtab *htab, /* The table */
void *ptr, /* Key */
int freep); /* Free data part? */
void hashtabforeach(Hashtab *htab,
int (*func)(void *ptr, void *arg),
void *arg);
unsigned hashadd(const char *s); /* Standard hash function */
unsigned hashcaseadd(const char *s); /* Standard hash function */
unsigned hashjpw(const char *s); /* another hash function */
/* macros */
/* Don't free space */
#define hashtabdel(htab,key) _hashtabdel(htab,key,FALSE)
#define hashtabfree(htab,key) _hashtabdel(htab,key,TRUE) /* Do! */
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