usr/src/lib/libbc/libc/gen/common/strspn.c

   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  * Return the number of characters in the maximum leading segment
  30  * of string which consists solely of characters from charset.
  31  */
  32 int
  33 strspn(string, charset)
  34 char    *string;
  35 register char   *charset;
  36 {
  37         register char *p, *q;
  38
  39         for(q=string; *q != '\0'; ++q) {
  40                 for(p=charset; *p != '\0' && *p != *q; ++p)
  41                         ;
  42                 if(*p == '\0')
  43                         break;
  44         }
  45         return(q-string);
  46 }