1/*-
2 * Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
3 *		at Electronni Visti IA, Kiev, Ukraine.
4 *			All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29#if 0
30__FBSDID("FreeBSD: src/lib/libc/string/strxfrm.c,v 1.15 2002/09/06 11:24:06 tjr Exp ");
31#endif
32__FBSDID("$FreeBSD: src/lib/libc/string/wcsxfrm.c,v 1.3 2004/04/07 09:47:56 tjr Exp $");
33
34#include "xlocale_private.h"
35
36#include <stdlib.h>
37#include <string.h>
38#include <wchar.h>
39#include <errno.h>
40#include "collate.h"
41
42#define WCS_XFRM_OFFSET	1
43
44size_t
45wcsxfrm_l(wchar_t * __restrict dest, const wchar_t * __restrict src, size_t len,
46    locale_t loc)
47{
48	size_t slen;
49	wchar_t *xf[2];
50	int sverrno;
51
52	if (*src == L'\0') {
53		if (len != 0)
54			*dest = L'\0';
55		return (0);
56	}
57
58	NORMALIZE_LOCALE(loc);
59	if (loc->__collate_load_error) {
60		slen = wcslen(src);
61		if (len > 0) {
62			if (slen < len)
63				wcscpy(dest, src);
64			else {
65				wcsncpy(dest, src, len - 1);
66				dest[len - 1] = L'\0';
67			}
68		}
69		return (slen);
70	}
71
72	__collate_xfrm(src, xf, loc);
73
74	slen = wcslen(xf[0]);
75	if (xf[1])
76		slen += wcslen(xf[1]) + 1;
77	if (len > 0) {
78		wchar_t *w = xf[0];
79		while (len > 1) {
80			if (!*w)
81				break;
82			*dest++ = *w++ + WCS_XFRM_OFFSET;
83			len--;
84		}
85		if ((w = xf[1]) != NULL) {
86			if (len > 1)
87				*dest++ = WCS_XFRM_OFFSET;
88			while (len > 1) {
89				if (!*w)
90					break;
91				*dest++ = *w++ + WCS_XFRM_OFFSET;
92				len--;
93			}
94		}
95		*dest = 0;
96 	}
97	sverrno = errno;
98	free(xf[0]);
99	free(xf[1]);
100	errno = sverrno;
101
102	return (slen);
103}
104
105size_t
106wcsxfrm(wchar_t * __restrict dest, const wchar_t * __restrict src, size_t len)
107{
108	return wcsxfrm_l(dest, src, len, __current_locale());
109}
110