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 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 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 * 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