2 * Copyright (c) 2010 Marcel Moolenaar
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
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: head/lib/libefivar/libefivar.c 307071 2016-10-11 22:30:41Z imp $");
30 #include <sys/types.h>
37 #include <machine/efi.h>
39 #include "libefivar_int.h"
44 * If nm were converted to utf8, what what would strlen
45 * return on the resulting string?
48 utf8_len_of_ucs2(const efi_char
*nm
)
68 libefi_ucs2_to_utf8(const efi_char
*nm
, char **name
)
73 int freeit
= *name
== NULL
;
75 sz
= utf8_len_of_ucs2(nm
) + 1;
80 cp
= *name
= malloc(sz
);
88 *cp
++ = (char)(0xE0 | (c
>> 12));
90 *cp
++ = (char)(0x80 | ((c
>> 6) & 0x3f));
92 *cp
++ = (char)(0x80 | (c
& 0x3f));
93 } else if (c
> 0x7f) {
95 *cp
++ = (char)(0xC0 | ((c
>> 6) & 0x1f));
97 *cp
++ = (char)(0x80 | (c
& 0x3f));
100 *cp
++ = (char)(c
& 0x7f);
105 /* Absent bugs, we'll never return EOVERFLOW */
116 libefi_utf8_to_ucs2(const char *name
, efi_char
**nmp
, size_t *len
)
122 int freeit
= *nmp
== NULL
;
124 sz
= strlen(name
) * 2 + 2;
132 while (sz
> 1 && *name
!= '\0') {
135 * Conditionalize on the two major character types:
136 * initial and followup characters.
138 if ((c
& 0xc0) != 0x80) {
139 /* Initial characters. */
145 if ((c
& 0xf8) == 0xf0) {
148 } else if ((c
& 0xf0) == 0xe0) {
151 } else if ((c
& 0xe0) == 0xc0) {
159 /* Followup characters. */
161 ucs4
= (ucs4
<< 6) + (c
& 0x3f);
163 } else if (bytes
== 0) {
175 *nm
++ = (efi_char
)ucs4
;