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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.
*/
#include <ctype.h>
#include <string.h>
#include <limits.h>
#include <locale.h>
int collate_range_cmp (c1, c2)
int c1, c2;
{
static char s1[2], s2[2];
c1 &= UCHAR_MAX;
c2 &= UCHAR_MAX;
if (c1 == c2)
return (0);
if ( (isascii(c1) && isascii(c2))
|| (!isalpha(c1) && !isalpha(c2))
)
return (c1 - c2);
if (isalpha(c1) && !isalpha(c2)) {
if (isupper(c1))
return ('A' - c2);
else
return ('a' - c2);
} else if (isalpha(c2) && !isalpha(c1)) {
if (isupper(c2))
return (c1 - 'A');
else
return (c1 - 'a');
}
if (isupper(c1) && islower(c2))
return (-1);
else if (islower(c1) && isupper(c2))
return (1);
s1[0] = c1;
s2[0] = c2;
return strcoll(s1, s2);
}
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