/src/rtpproxy/external/libre/src/sys/endian.c
Line | Count | Source |
1 | | /** |
2 | | * @file endian.c Endianness converting routines |
3 | | * |
4 | | * Copyright (C) 2010 Creytiv.com |
5 | | */ |
6 | | #include <re_types.h> |
7 | | #include <re_mbuf.h> |
8 | | #include <re_sys.h> |
9 | | |
10 | | |
11 | | /* |
12 | | * These routes are working on both little-endian and big-endian platforms. |
13 | | */ |
14 | | |
15 | | |
16 | | /** |
17 | | * Convert a 16-bit value from host order to little endian |
18 | | * |
19 | | * @param v 16-bit in host order |
20 | | * |
21 | | * @return 16-bit little endian value |
22 | | */ |
23 | | uint16_t sys_htols(uint16_t v) |
24 | 0 | { |
25 | 0 | uint8_t *p = (uint8_t *)&v; |
26 | 0 | uint16_t l = 0; |
27 | |
|
28 | 0 | l |= (uint16_t)*p++ << 0; |
29 | 0 | l |= (uint16_t)*p << 8; |
30 | |
|
31 | 0 | return l; |
32 | 0 | } |
33 | | |
34 | | |
35 | | /** |
36 | | * Convert a 32-bit value from host order to little endian |
37 | | * |
38 | | * @param v 32-bit in host order |
39 | | * |
40 | | * @return 32-bit little endian value |
41 | | */ |
42 | | uint32_t sys_htoll(uint32_t v) |
43 | 0 | { |
44 | 0 | uint8_t *p = (uint8_t *)&v; |
45 | 0 | uint32_t l = 0; |
46 | |
|
47 | 0 | l |= (uint32_t)*p++ << 0; |
48 | 0 | l |= (uint32_t)*p++ << 8; |
49 | 0 | l |= (uint32_t)*p++ << 16; |
50 | 0 | l |= (uint32_t)*p << 24; |
51 | |
|
52 | 0 | return l; |
53 | 0 | } |
54 | | |
55 | | |
56 | | /** |
57 | | * Convert a 16-bit value from little endian to host order |
58 | | * |
59 | | * @param v 16-bit little endian value |
60 | | * |
61 | | * @return 16-bit value in host order |
62 | | */ |
63 | | uint16_t sys_ltohs(uint16_t v) |
64 | 0 | { |
65 | 0 | uint16_t s; |
66 | 0 | uint8_t *p = (uint8_t *)&s; |
67 | |
|
68 | 0 | *p++ = v>>0 & 0xff; |
69 | 0 | *p = v>>8 & 0xff; |
70 | |
|
71 | 0 | return s; |
72 | 0 | } |
73 | | |
74 | | |
75 | | /** |
76 | | * Convert a 32-bit value from little endian to host order |
77 | | * |
78 | | * @param v 32-bit little endian value |
79 | | * |
80 | | * @return 32-bit value in host order |
81 | | */ |
82 | | uint32_t sys_ltohl(uint32_t v) |
83 | 0 | { |
84 | 0 | uint32_t h; |
85 | 0 | uint8_t *p = (uint8_t *)&h; |
86 | |
|
87 | 0 | *p++ = v>>0 & 0xff; |
88 | 0 | *p++ = v>>8 & 0xff; |
89 | 0 | *p++ = v>>16 & 0xff; |
90 | 0 | *p = v>>24 & 0xff; |
91 | |
|
92 | 0 | return h; |
93 | 0 | } |
94 | | |
95 | | |
96 | | /** |
97 | | * Convert a 64-bit value from host to network byte-order |
98 | | * |
99 | | * @param v 64-bit host byte-order value |
100 | | * |
101 | | * @return 64-bit value in network byte-order |
102 | | */ |
103 | | uint64_t sys_htonll(uint64_t v) |
104 | 0 | { |
105 | 0 | uint64_t h = 0; |
106 | 0 | uint8_t *p = (uint8_t *)&v; |
107 | |
|
108 | 0 | h |= (uint64_t)*p++ << 56; |
109 | 0 | h |= (uint64_t)*p++ << 48; |
110 | 0 | h |= (uint64_t)*p++ << 40; |
111 | 0 | h |= (uint64_t)*p++ << 32; |
112 | 0 | h |= (uint64_t)*p++ << 24; |
113 | 0 | h |= (uint64_t)*p++ << 16; |
114 | 0 | h |= (uint64_t)*p++ << 8; |
115 | 0 | h |= (uint64_t)*p << 0; |
116 | |
|
117 | 0 | return h; |
118 | 0 | } |
119 | | |
120 | | |
121 | | /** |
122 | | * Convert a 64-bit value from network to host byte-order |
123 | | * |
124 | | * @param v 64-bit network byte-order value |
125 | | * |
126 | | * @return 64-bit value in host byte-order |
127 | | */ |
128 | | uint64_t sys_ntohll(uint64_t v) |
129 | 716 | { |
130 | 716 | uint64_t h; |
131 | 716 | uint8_t *p = (uint8_t *)&h; |
132 | | |
133 | 716 | *p++ = (uint8_t) (v>>56 & 0xff); |
134 | 716 | *p++ = (uint8_t) (v>>48 & 0xff); |
135 | 716 | *p++ = (uint8_t) (v>>40 & 0xff); |
136 | 716 | *p++ = (uint8_t) (v>>32 & 0xff); |
137 | 716 | *p++ = (uint8_t) (v>>24 & 0xff); |
138 | 716 | *p++ = (uint8_t) (v>>16 & 0xff); |
139 | 716 | *p++ = (uint8_t) (v>>8 & 0xff); |
140 | 716 | *p = (uint8_t) (v>>0 & 0xff); |
141 | | |
142 | 716 | return h; |
143 | 716 | } |