2 * Copyright (c) 2002 Tim J. Robbins
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
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12 * documentation and/or other materials provided with the distribution.
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17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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26 * $FreeBSD: src/lib/libc/string/wcscoll.c,v 1.3 2004/04/07 09:47:56 tjr Exp $
35 static char *__mbsdup(const wchar_t *);
38 * Placeholder implementation of wcscoll(). Attempts to use the single-byte
39 * collation ordering where possible, and falls back on wcscmp() in locales
40 * with extended character sets.
43 wcscoll(const wchar_t *ws1, const wchar_t *ws2)
48 if (__collate_load_error || MB_CUR_MAX > 1)
50 * Locale has no special collating order, could not be
51 * loaded, or has an extended character set; do a fast binary
54 return (wcscmp(ws1, ws2));
56 if ((mbs1 = __mbsdup(ws1)) == NULL || (mbs2 = __mbsdup(ws2)) == NULL) {
58 * Out of memory or illegal wide chars; fall back to wcscmp()
59 * but leave errno indicating the error. Callers that don't
60 * check for error will get a reasonable but often slightly
66 return (wcscmp(ws1, ws2));
69 diff = strcoll(mbs1, mbs2);
79 __mbsdup(const wchar_t *ws)
81 static const mbstate_t initial;
89 if ((len = wcsrtombs(NULL, &wcp, 0, &st)) == (size_t)-1)
91 if ((mbs = malloc(len + 1)) == NULL)
94 wcsrtombs(mbs, &ws, len + 1, &st);