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/*
* Copyright 2010 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* This code is derived from software contributed to Berkeley by
* Paul Borman at Krystal Technologies.
*
* 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.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#include "lint.h"
#include <wctype.h>
#include <stdio.h>
#include "runetype.h"
static wint_t
__change_case_ext(wint_t c, int lower)
{
size_t lim;
_RuneRange *rr;
_RuneEntry *base, *re;
if (c < 0 || c == EOF)
return (c);
rr = lower ?
&_CurrentRuneLocale->__maplower_ext :
&_CurrentRuneLocale->__mapupper_ext;
/* Binary search -- see bsearch.c for explanation. */
base = rr->__ranges;
for (lim = rr->__nranges; lim != 0; lim >>= 1) {
re = base + (lim >> 1);
if (re->__min <= c && c <= re->__max) {
return (re->__map + c - re->__min);
} else if (c > re->__max) {
base = re + 1;
lim--;
}
}
return (c);
}
#undef towlower
wint_t
towlower(wint_t wc)
{
return ((wc < 0 || wc >= _CACHED_RUNES) ?
__change_case_ext(wc, 1) :
_CurrentRuneLocale->__maplower[wc]);
}
#undef towupper
wint_t
towupper(wint_t wc)
{
return ((wc < 0 || wc >= _CACHED_RUNES) ?
__change_case_ext(wc, 0) :
_CurrentRuneLocale->__mapupper[wc]);
}
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