1 /* $OpenBSD: look.c,v 1.10 2002/04/26 16:15:16 espie Exp $ */
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
8 * Ozan Yigit at York University.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 static char sccsid[] = "@(#)look.c 8.1 (Berkeley) 6/6/93";
45 #include <sys/cdefs.h>
46 __FBSDID("$FreeBSD$");
50 * Facility: m4 macro processor
54 #include <sys/types.h>
63 static void freent(ndptr);
66 hash(const char *name)
70 h = (h << 5) + h + *name++;
75 * find name in the hash table
78 lookup(const char *name)
84 for (p = hashtab[h % HASHSIZE]; p != nil; p = p->nxtptr)
85 if (h == p->hv && STREQ(name, p->name))
91 * hash and create an entry in the hash table.
92 * The new entry is added in front of a hash bucket.
95 addent(const char *name)
101 p = (ndptr) xalloc(sizeof(struct ndblock));
102 p->nxtptr = hashtab[h % HASHSIZE];
103 hashtab[h % HASHSIZE] = p;
104 p->name = xstrdup(name);
112 free((char *) p->name);
114 free((char *) p->defn);
119 * remove an entry from the hashtable
122 remhash(const char *name, int all)
128 mp = hashtab[h % HASHSIZE];
131 if (mp->hv == h && STREQ(mp->name, name)) {
134 freent(hashtab[h % HASHSIZE]);
135 hashtab[h % HASHSIZE] = mp;