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  1. /*
  2. FUNCTION
  3.         <<wmemchr>>---find a wide character in memory
  4.  
  5.  
  6. ANSI_SYNOPSIS
  7.         #include <wchar.h>
  8.         wchar_t *wmemchr(const wchar_t *<[s]>, wchar_t <[c]>, size_t <[n]>);
  9.  
  10. TRAD_SYNOPSIS
  11.         wchar_t *wmemchr(<[s]>, <[c]>, <[n]>
  12.         const wchar_t *<[s]>;
  13.         wchar_t <[c]>;
  14.         size_t <[n]>;
  15.  
  16. DESCRIPTION
  17.         The <<wmemchr>> function locates the first occurrence of <[c]> in the
  18.         initial <[n]> wide characters of the object pointed to be <[s]>. This
  19.         function is not affected by locale and all wchar_t values are treated
  20.         identically.  The null wide character and wchar_t values not
  21.         corresponding to valid characters are not treated specially.
  22.  
  23.         If <[n]> is zero, <[s]> must be a valid pointer and the function
  24.         behaves as if no valid occurrence of <[c]> is found.
  25.  
  26. RETURNS
  27.         The <<wmemchr>> function returns a pointer to the located
  28.         wide character, or a null pointer if the wide character does not occur
  29.         in the object.
  30.  
  31. PORTABILITY
  32. <<wmemchr>> is ISO/IEC 9899/AMD1:1995 (ISO C).
  33.  
  34. No supporting OS subroutines are required.
  35. */
  36.  
  37. /*      $NetBSD: wmemchr.c,v 1.1 2000/12/23 23:14:37 itojun Exp $       */
  38.  
  39. /*-
  40.  * Copyright (c)1999 Citrus Project,
  41.  * All rights reserved.
  42.  *
  43.  * Redistribution and use in source and binary forms, with or without
  44.  * modification, are permitted provided that the following conditions
  45.  * are met:
  46.  * 1. Redistributions of source code must retain the above copyright
  47.  *    notice, this list of conditions and the following disclaimer.
  48.  * 2. Redistributions in binary form must reproduce the above copyright
  49.  *    notice, this list of conditions and the following disclaimer in the
  50.  *    documentation and/or other materials provided with the distribution.
  51.  *
  52.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  53.  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55.  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  56.  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57.  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58.  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59.  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60.  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61.  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62.  * SUCH DAMAGE.
  63.  *
  64.  *      citrus Id: wmemchr.c,v 1.2 2000/12/20 14:08:31 itojun Exp
  65.  */
  66.  
  67.  
  68. #include <_ansi.h>
  69. #include <wchar.h>
  70.  
  71. wchar_t *
  72. _DEFUN (wmemchr, (s, c, n),
  73.         _CONST wchar_t * s _AND
  74.         wchar_t c _AND
  75.         size_t n)
  76. {
  77.   size_t i;
  78.  
  79.   for (i = 0; i < n; i++)
  80.     {
  81.       if (*s == c)
  82.         {
  83.           /* LINTED const castaway */
  84.           return (wchar_t *) s;
  85.         }
  86.       s++;
  87.     }
  88.   return NULL;
  89. }
  90.