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comparison compat/endian.c @ 0:d541e748cfd8

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Initial revision
author Guido Berhoerster <guido+libpws@berhoerster.name>
date Tue, 10 Feb 2015 11:29:54 +0100
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-1:000000000000 0:d541e748cfd8
1 /*
2 * Copyright (C) 2015 Guido Berhoerster <guido+pws@berhoerster.name>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included
13 * in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 */
23
24 #include <arpa/inet.h>
25
26 #include "pws-compat.h"
27 #include "endian.h"
28
29 uint16_t
30 le16toh(uint16_t little16)
31 {
32 unsigned char *b = (unsigned char *)&little16;
33
34 return ((b[0] << 0) | (b[1] << 8));
35 }
36
37 uint16_t
38 htole16(uint16_t host16)
39 {
40 uint16_t little16;
41 unsigned char *b = (unsigned char *)&little16;
42
43 b[0] = (unsigned char)(host16 >> 0);
44 b[1] = (unsigned char)(host16 >> 8);
45
46 return (little16);
47 }
48
49 uint32_t
50 le32toh(uint32_t little32)
51 {
52 unsigned char *b = (unsigned char *)&little32;
53
54 return ((b[0] << 0) | (b[1] << 8) | (b[2] << 16) | (b[3] << 24));
55 }
56
57 uint32_t
58 htole32(uint32_t host32)
59 {
60 uint32_t little32;
61 unsigned char *b = (unsigned char *)&little32;
62
63 b[0] = (unsigned char)(host32 >> 0);
64 b[1] = (unsigned char)(host32 >> 8);
65 b[2] = (unsigned char)(host32 >> 16);
66 b[3] = (unsigned char)(host32 >> 24);
67
68 return (little32);
69 }
70
71 uint16_t
72 be16toh(uint16_t big16)
73 {
74 return (ntohs(big16));
75 }
76
77 uint16_t
78 htobe16(uint16_t host16)
79 {
80 return (htons(host16));
81 }
82
83 uint32_t
84 be32toh(uint32_t big32)
85 {
86 return (ntohl(big32));
87 }
88
89 uint32_t
90 htobe32(uint32_t host32)
91 {
92 return (htonl(host32));
93 }