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/* mbscasecmp - case-insensitive multibyte string comparison. */
/* Copyright (C) 2009-2015 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Bash is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Bash. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#if !defined (HAVE_MBSCASECMP) && defined (HANDLE_MULTIBYTE)
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <wchar.h>
#include <wctype.h>
/* Compare MBS1 and MBS2 without regard to case. */
int
mbscasecmp (mbs1, mbs2)
const char *mbs1;
const char *mbs2;
{
int len1, len2, mb_cur_max;
wchar_t c1, c2, l1, l2;
len1 = len2 = 0;
/* Reset multibyte characters to their initial state. */
(void) mblen ((char *) NULL, 0);
mb_cur_max = MB_CUR_MAX;
do
{
len1 = mbtowc (&c1, mbs1, mb_cur_max);
len2 = mbtowc (&c2, mbs2, mb_cur_max);
if (len1 == 0)
return len2 == 0 ? 0 : -1;
else if (len2 == 0)
return 1;
else if (len1 > 0 && len2 < 0)
return -1;
else if (len1 < 0 && len2 > 0)
return 1;
else if (len1 < 0 && len2 < 0)
{
len1 = strlen (mbs1);
len2 = strlen (mbs2);
return (len1 == len2 ? memcmp (mbs1, mbs2, len1)
: ((len1 < len2) ? (memcmp (mbs1, mbs2, len1) > 0 ? 1 : -1)
: (memcmp (mbs1, mbs2, len2) >= 0 ? 1 : -1)));
}
l1 = towlower (c1);
l2 = towlower (c2);
mbs1 += len1;
mbs2 += len2;
}
while (l1 == l2);
return l1 - l2;
}
#endif
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