newlib/libc/ctype/iswcntrl.c

/* Copyright (c) 2002 Red Hat Incorporated.
   All rights reserved.

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   modification, are permitted provided that the following conditions are met:

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     notice, this list of conditions and the following disclaimer in the
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     The name of Red Hat Incorporated may not be used to endorse
     or promote products derived from this software without specific
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   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 RED HAT INCORPORATED BE LIABLE FOR ANY
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*/

/*
FUNCTION
	<<iswcntrl>>---control wide character test

INDEX
	iswcntrl

ANSI_SYNOPSIS
	#include <wctype.h>
	int iswcntrl(wint_t <[c]>);

TRAD_SYNOPSIS
	#include <wctype.h>
	int iswcntrl(<[c]>)
	wint_t <[c]>;

DESCRIPTION
<<iswcntrl>> is a function which classifies wide-character values that
are categorized as control characters.

RETURNS
<<iswcntrl>> returns non-zero if <[c]> is a control wide character.

PORTABILITY
<<iswcntrl>> is C99.

No supporting OS subroutines are required.
*/
#include <_ansi.h>
#include <newlib.h>
#include <wctype.h>
#include <ctype.h>
#include <string.h>
#include "local.h"

int
_DEFUN(iswcntrl,(c), wint_t c)
{
#ifdef _MB_CAPABLE
  c = _jp2uc (c);

  /* Based on Unicode 5.2.  All characters from general category "Cc", "Zl",
     and "Zp".  */
  return ((c >= 0x0000 && c <= 0x001f) || 
	  (c >= 0x007f && c <= 0x009f) ||
	  c == 0x2028 || c == 0x2029);
#else
  return (c < 0x100 ? iscntrl (c) : 0);
#endif /* _MB_CAPABLE */
}