1 /*-
2 * Copyright 2016 Netflix, Inc.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD: stable/12/stand/efi/libefi/wchar.c 351913 2019-09-05 23:27:59Z imp $");
28
29 #include <efi.h>
30 #include <efilib.h>
31
32 /*
33 * CHAR16 related functions moved from loader.
34 * Perhaps we should move those to libstand afterall, but they are
35 * needed only by UEFI.
36 */
37
38 int
wcscmp(CHAR16 * a,CHAR16 * b)39 wcscmp(CHAR16 *a, CHAR16 *b)
40 {
41
42 while (*a && *b && *a == *b) {
43 a++;
44 b++;
45 }
46 return *a - *b;
47 }
48
49 /*
50 * cpy8to16 copies a traditional C string into a CHAR16 string and
51 * 0 terminates it. len is the size of *dst in bytes.
52 */
53 void
cpy8to16(const char * src,CHAR16 * dst,size_t len)54 cpy8to16(const char *src, CHAR16 *dst, size_t len)
55 {
56 len <<= 1; /* Assume CHAR16 is 2 bytes */
57 while (len > 0 && *src) {
58 *dst++ = *src++;
59 len--;
60 }
61 *dst++ = (CHAR16)0;
62 }
63
64 void
cpy16to8(const CHAR16 * src,char * dst,size_t len)65 cpy16to8(const CHAR16 *src, char *dst, size_t len)
66 {
67 size_t i;
68
69 for (i = 0; i < len && src[i]; i++)
70 dst[i] = (char)src[i];
71 if (i < len)
72 dst[i] = '\0';
73 }
74