fd4f1dd9fa
locale-sensitive collation only in single-byte locales, and just does binary comparison for the others with extended character sets.
116 lines
2.9 KiB
C
116 lines
2.9 KiB
C
/*-
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* Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
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* at Electronni Visti IA, Kiev, Ukraine.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if 0
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__FBSDID("FreeBSD: src/lib/libc/string/strxfrm.c,v 1.15 2002/09/06 11:24:06 tjr Exp ");
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#endif
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__FBSDID("$FreeBSD$");
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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#include "collate.h"
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static char *__mbsdup(const wchar_t *);
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/*
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* Placeholder wcsxfrm() implementation. See wcscoll.c for a description of
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* the logic used.
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*/
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size_t
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wcsxfrm(wchar_t * __restrict dest, const wchar_t * __restrict src, size_t len)
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{
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int prim, sec, l;
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size_t slen;
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char *mbsrc, *s, *ss;
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if (*src == L'\0') {
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if (len != 0)
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*dest = L'\0';
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return (0);
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}
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if (__collate_load_error || MB_CUR_MAX > 1) {
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slen = wcslen(src);
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if (len > 0) {
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if (slen < len)
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wcscpy(dest, src);
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else {
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wcsncpy(dest, src, len - 1);
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dest[len - 1] = L'\0';
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}
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}
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return (slen);
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}
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mbsrc = __mbsdup(src);
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slen = 0;
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prim = sec = 0;
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ss = s = __collate_substitute(mbsrc);
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while (*s != '\0') {
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while (*s != '\0' && prim == 0) {
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__collate_lookup(s, &l, &prim, &sec);
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s += l;
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}
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if (prim != 0) {
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if (len > 1) {
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*dest++ = (wchar_t)prim;
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len--;
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}
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slen++;
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prim = 0;
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}
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}
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free(ss);
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free(mbsrc);
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if (len != 0)
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*dest = L'\0';
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return (slen);
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}
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static char *
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__mbsdup(const wchar_t *ws)
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{
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mbstate_t state;
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const wchar_t *wcp;
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size_t len;
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char *mbs;
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memset(&state, 0, sizeof(state));
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wcp = ws;
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if ((len = wcsrtombs(NULL, &wcp, 0, &state)) == (size_t)-1)
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return (NULL);
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if ((mbs = malloc(len + 1)) == NULL)
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return (NULL);
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memset(&state, 0, sizeof(state));
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wcsrtombs(mbs, &ws, len + 1, &state);
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return (mbs);
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}
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