towctrans.c

KPIT GNU Tools is a set of GNU development tools for Renesas microcontrollers.

/* 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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     or promote products derived from this software without specific
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   ARE DISCLAIMED.  IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
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*/

/*
FUNCTION
	<<towctrans>>---extensible wide-character translation

INDEX
	towctrans

ANSI_SYNOPSIS
	#include <wctype.h>
	wint_t towctrans(wint_t <[c]>, wctrans_t <[w]>);

TRAD_SYNOPSIS
	#include <wctype.h>
	wint_t towctrans(<[c]>, <[w]>)
	wint_t <[c]>;
	wctrans_t <[w]>;


DESCRIPTION
<<towctrans>> is a function which converts wide characters based on
a specified translation type <[w]>.  If the translation type is
invalid or cannot be applied to the current character, no change
to the character is made.

RETURNS
<<towctrans>> returns the translated equivalent of <[c]> when it is a
valid for the given translation, otherwise, it returns the input character.
When the translation type is invalid, <<errno>> is set <<EINVAL>>.

PORTABILITY
<<towctrans>> is C99.

No supporting OS subroutines are required.
*/

#include <_ansi.h>
#include <string.h>
#include <reent.h>
#include <wctype.h>
#include <errno.h>
#include "local.h"

wint_t
_DEFUN (_towctrans_r, (r, c, w), 
	struct _reent *r _AND
	wint_t c _AND 
	wctrans_t w)
{
  if (w == WCT_TOLOWER)
    return towlower (c);
  else if (w == WCT_TOUPPER)
    return towupper (c);
  else
    {
      r->_errno = EINVAL;
      return c;
    }
}

#ifndef _REENT_ONLY
wint_t
_DEFUN (towctrans, (c, w),
	wint_t c _AND
        wctrans_t w)
{
  return _towctrans_r (_REENT, c, w);
}
#endif /* !_REENT_ONLY */