1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright (c) 1994, by Sun Microsystems, Inc.
24*0Sstevel@tonic-gate * All rights reserved.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #ident "%Z%%M% %I% %E% SMI" /* SMI4.1 1.4 */
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate #include <ctype.h>
30*0Sstevel@tonic-gate #include "util.h"
31*0Sstevel@tonic-gate #include "table.h"
32*0Sstevel@tonic-gate
33*0Sstevel@tonic-gate
34*0Sstevel@tonic-gate
35*0Sstevel@tonic-gate /*
36*0Sstevel@tonic-gate * Hash table manager. Store/lookup strings, keyed by string
37*0Sstevel@tonic-gate */
38*0Sstevel@tonic-gate
39*0Sstevel@tonic-gate /*
40*0Sstevel@tonic-gate * Generate the key into the table using the first two letters
41*0Sstevel@tonic-gate * of "str". The table is alphabetized, with no distinction between
42*0Sstevel@tonic-gate * upper and lower case. Non-letters are given least significance.
43*0Sstevel@tonic-gate */
44*0Sstevel@tonic-gate int
tablekey(str)45*0Sstevel@tonic-gate tablekey(str)
46*0Sstevel@tonic-gate register char *str;
47*0Sstevel@tonic-gate {
48*0Sstevel@tonic-gate #define TOLOWER(c) (islower(c) ? c : \
49*0Sstevel@tonic-gate (isupper(c) ? tolower(c) : ('a'+NUMLETTERS-1)))
50*0Sstevel@tonic-gate
51*0Sstevel@tonic-gate register int c1, c2;
52*0Sstevel@tonic-gate
53*0Sstevel@tonic-gate c1 = *str++;
54*0Sstevel@tonic-gate c2 = *str;
55*0Sstevel@tonic-gate if (c1 == EOS) {
56*0Sstevel@tonic-gate c2 = EOS; /* just in case */
57*0Sstevel@tonic-gate }
58*0Sstevel@tonic-gate c1 = TOLOWER(c1) - 'a';
59*0Sstevel@tonic-gate c2 = TOLOWER(c2) - 'a';
60*0Sstevel@tonic-gate return (c1*NUMLETTERS + c2);
61*0Sstevel@tonic-gate }
62*0Sstevel@tonic-gate
63*0Sstevel@tonic-gate
64*0Sstevel@tonic-gate void
store(table,key,datum)65*0Sstevel@tonic-gate store(table, key, datum)
66*0Sstevel@tonic-gate stringtable table;
67*0Sstevel@tonic-gate char *key;
68*0Sstevel@tonic-gate char *datum;
69*0Sstevel@tonic-gate {
70*0Sstevel@tonic-gate int index;
71*0Sstevel@tonic-gate tablelist cur, new;
72*0Sstevel@tonic-gate
73*0Sstevel@tonic-gate index = tablekey(key);
74*0Sstevel@tonic-gate cur = table[index];
75*0Sstevel@tonic-gate
76*0Sstevel@tonic-gate new = MALLOC(tablenode);
77*0Sstevel@tonic-gate new->key = key;
78*0Sstevel@tonic-gate new->datum = datum;
79*0Sstevel@tonic-gate new->next = cur;
80*0Sstevel@tonic-gate table[index] = new;
81*0Sstevel@tonic-gate }
82*0Sstevel@tonic-gate
83*0Sstevel@tonic-gate
84*0Sstevel@tonic-gate char *
lookup(table,key)85*0Sstevel@tonic-gate lookup(table, key)
86*0Sstevel@tonic-gate stringtable table;
87*0Sstevel@tonic-gate char *key;
88*0Sstevel@tonic-gate {
89*0Sstevel@tonic-gate tablelist cur;
90*0Sstevel@tonic-gate
91*0Sstevel@tonic-gate cur = table[tablekey(key)];
92*0Sstevel@tonic-gate while (cur && strcmp(cur->key, key)) {
93*0Sstevel@tonic-gate cur = cur->next;
94*0Sstevel@tonic-gate }
95*0Sstevel@tonic-gate if (cur) {
96*0Sstevel@tonic-gate return (cur->datum);
97*0Sstevel@tonic-gate } else {
98*0Sstevel@tonic-gate return (NULL);
99*0Sstevel@tonic-gate }
100*0Sstevel@tonic-gate }
101