Subversion Repositories openrisc_2011-10-31

/*

FUNCTION

        <<wcsrchr>>---wide-character string scanning operation

ANSI_SYNOPSIS

        #include <wchar.h>

        wchar_t *wcsrchr(const wchar_t *<[s]>, wchar_t <[c]>);

TRAD_SYNOPSIS

        #include <wchar.h>

        wchar_t *wcsrchr(<[s]>, <[c]>

        const wchar_t *<[s]>;

        wchar_t <[c]>;

DESCRIPTION

        The <<wcsrchr>> function locates the last occurrence of <[c]> in the

        wide-character string pointed to by <[s]>. The value of <[c]> must be a

        character representable as a type wchar_t and must be a wide-character

        code corresponding to a valid character in the current locale.

        The terminating null wide-character code is considered to be part of

        the wide-character string.

RETURNS

        Upon successful completion, <<wcsrchr>> returns a pointer to the

        wide-character code or a null pointer if <[c]> does not occur in the

        wide-character string.

PORTABILITY

<<wcsrchr>> is ISO/IEC 9899/AMD1:1995 (ISO C).

No supporting OS subroutines are required.

*/

/*      $NetBSD: wcsrchr.c,v 1.1 2000/12/23 23:14:37 itojun Exp $       */

/*-

 * Copyright (c)1999 Citrus Project,

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *      citrus Id: wcsrchr.c,v 1.2 2000/12/21 05:07:25 itojun Exp

 */

#include <_ansi.h>

#include <stddef.h>

#include <wchar.h>

wchar_t *

_DEFUN (wcsrchr, (s, c),

        _CONST wchar_t * s _AND

        wchar_t c)

{

  _CONST wchar_t *p;

  p = s;

  while (*p)

    p++;

  while (s <= p)

    {

      if (*p == c)

        {

          /* LINTED interface specification */

          return (wchar_t *) p;

        }

      p--;

    }

  return NULL;

}