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  1. /*
  2. FUNCTION
  3.         <<wcscspn>>---get length of a complementary wide substring
  4.  
  5. ANSI_SYNOPSIS
  6.         #include <wchar.h>
  7.         size_t wcscspn(const wchar_t *<[s]>, wchar_t *<[set]>);
  8.  
  9. TRAD_SYNOPSIS
  10.         size_t wcscspn(<[s]>, <[set]>
  11.         const wchar_t *<[s]>;
  12.         const wchar_t *<[set]>;
  13.  
  14. DESCRIPTION
  15.         The <<wcscspn>> function computes the length of the maximum initial
  16.         segment of the wide-character string pointed to by <[s]> which consists
  17.         entirely of wide-character codes not from the wide-character string
  18.         pointed to by <[set]>.
  19.  
  20. RETURNS
  21.         The <<wcscspn>> function returns the length of the initial substring of
  22.         <[s1]>; no return value is reserved to indicate an error.
  23.  
  24. PORTABILITY
  25. <<wcscspn>> is ISO/IEC 9899/AMD1:1995 (ISO C).
  26.  
  27. No supporting OS subroutines are required.
  28. */
  29.  
  30. /*      $NetBSD: wcscspn.c,v 1.1 2000/12/23 23:14:36 itojun Exp $       */
  31.  
  32. /*-
  33.  * Copyright (c)1999 Citrus Project,
  34.  * All rights reserved.
  35.  *
  36.  * Redistribution and use in source and binary forms, with or without
  37.  * modification, are permitted provided that the following conditions
  38.  * are met:
  39.  * 1. Redistributions of source code must retain the above copyright
  40.  *    notice, this list of conditions and the following disclaimer.
  41.  * 2. Redistributions in binary form must reproduce the above copyright
  42.  *    notice, this list of conditions and the following disclaimer in the
  43.  *    documentation and/or other materials provided with the distribution.
  44.  *
  45.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  46.  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48.  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  49.  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50.  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51.  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52.  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53.  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54.  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55.  * SUCH DAMAGE.
  56.  *
  57.  *      citrus Id: wcscspn.c,v 1.1 1999/12/29 21:47:45 tshiozak Exp
  58.  */
  59.  
  60. #include <_ansi.h>
  61. #include <wchar.h>
  62.  
  63. size_t
  64. _DEFUN (wcscspn, (s, set),
  65.         _CONST wchar_t * s _AND
  66.         _CONST wchar_t * set)
  67. {
  68.   _CONST wchar_t *p;
  69.   _CONST wchar_t *q;
  70.  
  71.   p = s;
  72.   while (*p)
  73.     {
  74.       q = set;
  75.       while (*q)
  76.         {
  77.           if (*p == *q)
  78.             goto done;
  79.           q++;
  80.         }
  81.       p++;
  82.     }
  83.  
  84. done:
  85.   return (p - s);
  86. }
  87.