82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
/* Copyright (c) 2002 Red Hat Incorporated.
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All rights reserved.
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Modified (m) 2017 Thomas Wolff to refer to generated Unicode data tables.
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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 following conditions are met:
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Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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The name of Red Hat Incorporated may not be used to endorse
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or promote products derived from this software without specific
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prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND 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 RED HAT INCORPORATED BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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FUNCTION
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<<towlower>>, <<towlower_l>>---translate wide characters to lowercase
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INDEX
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towlower
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INDEX
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towlower_l
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SYNOPSIS
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#include <wctype.h>
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wint_t towlower(wint_t <[c]>);
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#include <wctype.h>
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wint_t towlower_l(wint_t <[c]>, locale_t <[locale]>);
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DESCRIPTION
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<<towlower>> is a function which converts uppercase wide characters to
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lowercase, leaving all other characters unchanged.
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<<towlower_l>> is like <<towlower>> but performs the function based on the
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locale specified by the locale object locale. If <[locale]> is
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LC_GLOBAL_LOCALE or not a valid locale object, the behaviour is undefined.
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RETURNS
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<<towlower>>, <<towlower_l>> return the lowercase equivalent of <[c]> when it is a
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uppercase wide character; otherwise, it returns the input character.
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PORTABILITY
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<<towlower>> is C99.
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<<towlower_l>> is POSIX-1.2008.
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No supporting OS subroutines are required.
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*/
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#include <_ansi.h>
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#include <ctype.h>
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#include <wctype.h>
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#include "local.h"
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wint_t
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towlower (wint_t c)
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{
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#ifdef _MB_CAPABLE
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return towctrans (c, WCT_TOLOWER);
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#else
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return c < 0x00ff ? (wint_t)(tolower ((int)c)) : c;
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#endif /* _MB_CAPABLE */
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}
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