fd4f1dd9fa
locale-sensitive collation only in single-byte locales, and just does binary comparison for the others with extended character sets.
98 lines
2.9 KiB
C
98 lines
2.9 KiB
C
/*-
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* Copyright (c) 2002 Tim J. Robbins
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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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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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__FBSDID("$FreeBSD$");
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#include <errno.h>
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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 implementation of wcscoll(). Attempts to use the single-byte
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* collation ordering where possible, and falls back on wcscmp() in locales
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* with extended character sets.
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*/
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int
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wcscoll(const wchar_t *ws1, const wchar_t *ws2)
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{
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char *mbs1, *mbs2;
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int diff, sverrno;
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if (__collate_load_error || MB_CUR_MAX > 1)
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/*
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* Locale has no special collating order, could not be
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* loaded, or has an extended character set; do a fast binary
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* comparison.
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*/
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return (wcscmp(ws1, ws2));
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if ((mbs1 = __mbsdup(ws1)) == NULL || (mbs2 = __mbsdup(ws2)) == NULL) {
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/*
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* Out of memory or illegal wide chars; fall back to wcscmp()
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* but leave errno indicating the error. Callers that don't
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* check for error will get a reasonable but often slightly
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* incorrect result.
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*/
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sverrno = errno;
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free(mbs1);
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errno = sverrno;
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return (wcscmp(ws1, ws2));
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}
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diff = strcoll(mbs1, mbs2);
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sverrno = errno;
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free(mbs1);
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free(mbs2);
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errno = sverrno;
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return (diff);
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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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