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("$FreeBSD$");
30 #include <sys/ioctl.h>
31 #include <sys/types.h>
38 #include "libefi_int.h"
40 static int __iofd = -1;
57 __iofd = open("/dev/io", O_RDWR);
61 atexit(iodev_fd_close);
67 libefi_ucs2_to_utf8(u_short *nm, size_t *szp, char *name)
78 *name++ = 0xE0 | (c >> 12);
80 *name++ = 0x80 | ((c >> 6) & 0x3f);
82 *name++ = 0x80 | (c & 0x3f);
83 } else if (c > 0x7f) {
85 *name++ = 0xC0 | ((c >> 6) & 0x1f);
87 *name++ = 0x80 | (c & 0x3f);
97 return ((len <= sz) ? 0 : EOVERFLOW);
101 libefi_utf8_to_ucs2(char *name, size_t *szp, u_short **nmp)
108 *szp = sz = (*szp == 0) ? strlen(name) * 2 + 2 : *szp;
109 *nmp = nm = malloc(sz);
113 while (sz > 1 && *name != '\0') {
116 * Conditionalize on the two major character types:
117 * initial and followup characters.
119 if ((c & 0xc0) != 0x80) {
120 /* Initial characters. */
125 if ((c & 0xf8) == 0xf0) {
128 } else if ((c & 0xf0) == 0xe0) {
131 } else if ((c & 0xe0) == 0xc0) {
139 /* Followup characters. */
141 ucs4 = (ucs4 << 6) + (c & 0x3f);
143 } else if (bytes == 0) {
153 *nm++ = (u_short)ucs4;
166 libefi_efivar(struct iodev_efivar_req *req)
170 error = iodev_fd(&fd);
172 error = (ioctl(fd, IODEV_EFIVAR, req) == -1) ? errno : 0;