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/*
* $Id$
*
* Copyright (C) 2003 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Original Author: Adrian Havill <havill@redhat.com>
*
* Contributors:
*/
#include "wlite_config.h" // wchar_t, NULL, size_t
#include "wlite_wchar.h" // prototypes
#include "wlite_wctype.h"
#include "wlite_stdlib.h"
size_t
wlite_wcsxfrm(wchar_t *s1, const wchar_t *s2, size_t n) {
size_t i = 0, j = 0;
int lwsp = !0;
if (WLITE_IS_POSIX_(LC_COLLATE)) {
if (n != 0) {
wlite_wcsncpy(s1, s2, n);
}
return wlite_wcslen(s2);
}
do {
wlite_wint_t c = (wlite_wint_t) s2[j++];
/* reduce all runs of whitespace to one character, and transform
* different types of whitespace into plain ' ' chars
*/
if (wlite_iswctype(c, wlite_space_)) {
if (lwsp) continue;
lwsp = !0;
c = L' ';
}
else {
c = wlite_towctrans(c, wlite_tolower_);
#if WLITE_EXTENSIONS
c = wlite_towctrans(c, wlite_tocase_);
c = wlite_towctrans(c, wlite_tokata_);
c = wlite_towctrans(c, wlite_tonorm_);
if (wlite_iswctype(c, wlite_ignore_)) continue;
#endif
}
if (c != WLITE_WEOF) {
if (i < n) {
s1[i] = (wchar_t) c;
}
i++;
}
} while (s2[j] != L'\0');
if (i != 0 && lwsp) {
s1[--i] = L'\0'; // remove last unneeded whitespace
lwsp = 0;
}
// TODO: transform to Unicode NFC (UAX #15)
return i;
}
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