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/*
* Copyright (C) 1996 by Andrey A. Chernov, Moscow, Russia.
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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.
*
* $Id: collcmp.c,v 1.10 1997/02/22 14:59:54 peter Exp $
*/
#define ASCII_COMPATIBLE_COLLATE /* see usr.bin/colldef/data */
#include <string.h>
#include "collate.h"
#ifndef ASCII_COMPATIBLE_COLLATE
#include <ctype.h>
#endif
/*
* Compare two characters converting collate information
* into ASCII-compatible range, it allows to handle
* "[a-z]"-type ranges with national characters.
*/
int __collate_range_cmp (c1, c2)
int c1, c2;
{
static char s1[2], s2[2];
int ret;
#ifndef ASCII_COMPATIBLE_COLLATE
int as1, as2, al1, al2;
#endif
c1 &= UCHAR_MAX;
c2 &= UCHAR_MAX;
if (c1 == c2)
return (0);
#ifndef ASCII_COMPATIBLE_COLLATE
as1 = isascii(c1);
as2 = isascii(c2);
al1 = isalpha(c1);
al2 = isalpha(c2);
if (as1 || as2 || al1 || al2) {
if ((as1 && as2) || (!al1 && !al2))
return (c1 - c2);
if (al1 && !al2) {
if (isupper(c1))
return ('A' - c2);
else
return ('a' - c2);
} else if (al2 && !al1) {
if (isupper(c2))
return (c1 - 'A');
else
return (c1 - 'a');
}
}
#endif
s1[0] = c1;
s2[0] = c2;
if ((ret = strcoll(s1, s2)) != 0)
return (ret);
return (c1 - c2);
}
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