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/*
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FUNCTION
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        <>---get fixed-size wide-character string length
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INDEX
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        wcsnlen
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ANSI_SYNOPSIS
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        #include
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        size_t wcsnlen(const wchar_t *<[s]>, size_t <[maxlen]>);
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TRAD_SYNOPSIS
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        #include
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        size_t wcsnlen(<[s]>, <[maxlen]>)
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        wchar_t *<[s]>;
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        size_t <[maxlen]>;
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DESCRIPTION
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        The <> function computes the number of wide-character codes
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        in the wide-character string pointed to by <[s]> not including the
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        terminating L'\0' wide character but at most <[maxlen]> wide
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        characters.
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RETURNS
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        <> returns the length of <[s]> if it is less then <[maxlen]>,
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        or <[maxlen]> if there is no L'\0' wide character in first <[maxlen]>
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        characters.
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PORTABILITY
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<> is a GNU extension.
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<> requires no supporting OS subroutines.
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*/
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/*
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 * Copyright (c) 2003, Artem B. Bityuckiy (dedekind@mail.ru).
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the above copyright notice,
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 * this condition statement, and the following disclaimer are retained
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 * in any redistributions of the source code.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <_ansi.h>
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#include
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#include
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size_t
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_DEFUN(wcsnlen, (s, maxlen),
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                 _CONST wchar_t *s _AND
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                 size_t maxlen)
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{
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  _CONST wchar_t *p;
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  p = s;
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  while (*p && maxlen-- > 0)
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    p++;
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  return (size_t)(p - s);
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}
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