1 /* $NetBSD: strxfrm.c,v 1.14 2013/05/17 12:55:57 joerg Exp $ */
2
3 /*-
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Chris Torek.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 #if defined(LIBC_SCCS) && !defined(lint)
37 #if 0
38 static char sccsid[] = "@(#)strxfrm.c 8.1 (Berkeley) 6/4/93";
39 #else
40 __RCSID("$NetBSD: strxfrm.c,v 1.14 2013/05/17 12:55:57 joerg Exp $");
41 #endif
42 #endif /* LIBC_SCCS and not lint */
43
44 #include "namespace.h"
45
46 #include <assert.h>
47 #include <locale.h>
48 #include <string.h>
49 #include "setlocale_local.h"
50
__weak_alias(strxfrm_l,_strxfrm_l)51 __weak_alias(strxfrm_l, _strxfrm_l)
52
53 /*
54 * Transform src, storing the result in dst, such that
55 * strcmp() on transformed strings returns what strcoll()
56 * on the original untransformed strings would return.
57 */
58 size_t
59 strxfrm_l(char *dst, const char *src, size_t n, locale_t loc)
60 {
61 size_t srclen, copysize;
62
63 _DIAGASSERT(src != NULL);
64
65 /* XXX: LC_COLLATE should be implemented. */
66 /* LINTED */(void)loc;
67
68 /*
69 * Since locales are unimplemented, this is just a copy.
70 */
71 srclen = strlen(src);
72 if (n != 0) {
73 _DIAGASSERT(dst != NULL);
74 copysize = srclen < n ? srclen : n - 1;
75 (void)memcpy(dst, src, copysize);
76 dst[copysize] = 0;
77 }
78 return (srclen);
79 }
80
81 size_t
strxfrm(char * dst,const char * src,size_t n)82 strxfrm(char *dst, const char *src, size_t n)
83 {
84 return strxfrm_l(dst, src, n, _current_locale());
85 }
86