1 /*
2 * dhcpcd - DHCP client daemon
3 * Copyright (c) 2006-2014 Roy Marples <roy@marples.name>
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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 #ifndef ENDIAN_H
29 #define ENDIAN_H
30
31 #include <stdint.h>
32
33 inline static void
be32enc(uint8_t * buf,uint32_t u)34 be32enc(uint8_t *buf, uint32_t u)
35 {
36
37 buf[0] = (uint8_t)((u >> 24) & 0xff);
38 buf[1] = (uint8_t)((u >> 16) & 0xff);
39 buf[2] = (uint8_t)((u >> 8) & 0xff);
40 buf[3] = (uint8_t)(u & 0xff);
41 }
42
43 inline static void
be64enc(uint8_t * buf,uint64_t u)44 be64enc(uint8_t *buf, uint64_t u)
45 {
46
47 be32enc(buf, (uint32_t)(u >> 32));
48 be32enc(buf + sizeof(uint32_t), (uint32_t)(u & 0xffffffffULL));
49 }
50
51 inline static uint16_t
be16dec(const uint8_t * buf)52 be16dec(const uint8_t *buf)
53 {
54
55 return (uint16_t)(buf[0] << 8 | buf[1]);
56 }
57
58 inline static uint32_t
be32dec(const uint8_t * buf)59 be32dec(const uint8_t *buf)
60 {
61
62 return (uint32_t)((uint32_t)be16dec(buf) << 16 | be16dec(buf + 2));
63 }
64
65 inline static uint64_t
be64dec(const uint8_t * buf)66 be64dec(const uint8_t *buf)
67 {
68
69 return (uint64_t)((uint64_t)be32dec(buf) << 32 | be32dec(buf + 4));
70 }
71 #endif
72