usr/src/cmd/sh/string.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
  23 /*
  24  * Copyright 1995 Sun Microsystems, Inc.  All rights reserved.
  25  * Use is subject to license terms.
  26  */
  27
  28 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  29 /*        All Rights Reserved   */
  30
  31
  32 #pragma ident   "%Z%%M% %I%     %E% SMI"
  33 /*
  34  * UNIX shell
  35  */
  36
  37 #include        "defs.h"
  38
  39
  40 /* ========     general purpose string handling ======== */
  41
  42
  43 unsigned char *
  44 movstr(unsigned char *a, unsigned char *b)
  45 {
  46         while (*b++ = *a++);
  47         return(--b);
  48 }
  49
  50 int
  51 any(wchar_t c, unsigned char *s)
  52 {
  53         unsigned int d;
  54
  55         while (d = *s++)
  56         {
  57                 if (d == c)
  58                         return(TRUE);
  59         }
  60         return(FALSE);
  61 }
  62
  63 int anys(c, s)
  64 unsigned char *c, *s;
  65 {
  66         wchar_t f, e;
  67         wchar_t d;
  68         int n;
  69         if((n = mbtowc(&f, (char *)c, MULTI_BYTE_MAX)) <= 0)
  70                 return(FALSE);
  71         d = f;
  72         while(1) {
  73                 if((n = mbtowc(&e, (char *)s, MULTI_BYTE_MAX)) <= 0)
  74                         return(FALSE);
  75                 if(d == e)
  76                         return(TRUE);
  77                 s += n;
  78         }
  79 }
  80
  81 int
  82 cf(unsigned char *s1, unsigned char *s2)
  83 {
  84         while (*s1++ == *s2)
  85                 if (*s2++ == 0)
  86                         return(0);
  87         return(*--s1 - *s2);
  88 }
  89
  90 int length(as)
  91 unsigned char   *as;
  92 {
  93         unsigned char   *s;
  94
  95         if (s = as)
  96                 while (*s++);
  97         return(s - as);
  98 }
  99
 100 unsigned char *
 101 movstrn(unsigned char *a, unsigned char *b, int n)
 102 {
 103         while ((n-- > 0) && *a)
 104                 *b++ = *a++;
 105
 106         return(b);
 107 }