external/cddl/osnet/sys/kern/string.c

   1 /*      $NetBSD: string.c,v 1.1 2009/03/26 22:11:45 ad Exp $    */
   2
   3 /*
   4  * CDDL HEADER START
   5  *
   6  * The contents of this file are subject to the terms of the
   7  * Common Development and Distribution License (the "License").
   8  * You may not use this file except in compliance with the License.
   9  *
  10  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  11  * or http://www.opensolaris.org/os/licensing.
  12  * See the License for the specific language governing permissions
  13  * and limitations under the License.
  14  *
  15  * When distributing Covered Code, include this CDDL HEADER in each
  16  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  17  * If applicable, add the following below this CDDL HEADER, with the
  18  * fields enclosed by brackets "[]" replaced with your own identifying
  19  * information: Portions Copyright [yyyy] [name of copyright owner]
  20  *
  21  * CDDL HEADER END
  22  */
  23 /*
  24  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  25  * Use is subject to license terms.
  26  */
  27
  28 #include <sys/param.h>
  29 #include <sys/string.h>
  30
  31 #define IS_DIGIT(c)     ((c) >= '0' && (c) <= '9')
  32
  33 #define IS_ALPHA(c)     \
  34         (((c) >= 'a' && (c) <= 'z') || ((c) >= 'A' && (c) <= 'Z'))
  35
  36 char *
  37 strpbrk(const char *s, const char *b)
  38 {
  39         const char *p;
  40
  41         do {
  42                 for (p = b; *p != '\0' && *p != *s; ++p)
  43                         ;
  44                 if (*p != '\0')
  45                         return ((char *)s);
  46         } while (*s++);
  47
  48         return (NULL);
  49 }
  50
  51 /*
  52  * Convert a string into a valid C identifier by replacing invalid
  53  * characters with '_'.  Also makes sure the string is nul-terminated
  54  * and takes up at most n bytes.
  55  */
  56 void
  57 strident_canon(char *s, size_t n)
  58 {
  59         char c;
  60         char *end = s + n - 1;
  61
  62         if ((c = *s) == 0)
  63                 return;
  64
  65         if (!IS_ALPHA(c) && c != '_')
  66                 *s = '_';
  67
  68         while (s < end && ((c = *(++s)) != 0)) {
  69                 if (!IS_ALPHA(c) && !IS_DIGIT(c) && c != '_')
  70                         *s = '_';
  71         }
  72         *s = 0;
  73 }