toolchain/gcc/newlib/libc/string/wcslen.c

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