1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* Copyright (c) 1984 AT&T */ 23 /* All Rights Reserved */ 24 25 #pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 1.2 */ 26 27 /*LINTLIBRARY*/ 28 /* 29 * uses strpbrk and strspn to break string into tokens on 30 * sequentially subsequent calls. returns NULL when no 31 * non-separator characters remain. 32 * `subsequent' calls are calls with first argument NULL. 33 */ 34 35 #define NULL (char*)0 36 37 extern int strspn(); 38 extern char *strpbrk(); 39 40 char * 41 strtok(string, sepset) 42 char *string, *sepset; 43 { 44 register char *p, *q, *r; 45 static char *savept; 46 47 /*first or subsequent call*/ 48 p = (string == NULL)? savept: string; 49 50 if(p == 0) /* return if no tokens remaining */ 51 return(NULL); 52 53 q = p + strspn(p, sepset); /* skip leading separators */ 54 55 if(*q == '\0') /* return if no tokens remaining */ 56 return(NULL); 57 58 if((r = strpbrk(q, sepset)) == NULL) /* move past token */ 59 savept = 0; /* indicate this is last token */ 60 else { 61 *r = '\0'; 62 savept = ++r; 63 } 64 return(q); 65 } 66