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