usr/src/lib/libbc/libc/gen/common/rindex.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 #pragma ident   "%Z%%M% %I%     %E% SMI"
  23           /* from UCB 4.1 80/12/21 */
  24
  25 /*
  26  * Return the ptr in sp at which the character c last
  27  * appears; NULL if not found
  28  */
  29
  30 #define NULL 0
  31
  32 char *
  33 rindex(sp, c)
  34         register char *sp, c;
  35 {
  36         register char *r;
  37
  38         r = NULL;
  39         do {
  40                 if (*sp == c)
  41                         r = sp;
  42         } while (*sp++);
  43         return (r);
  44 }