source: soft/giet_vm/libs/libsrl/srl_endianness.h @ 161

Last change on this file since 161 was 160, checked in by karaoui, 13 years ago

giet-vm new version

File size: 1.7 KB
Line 
1#ifndef SRL_ENDIANNESS_H_
2#define SRL_ENDIANNESS_H_
3
4#include "srl_public_types.h"
5
6/** @this reads a big endian 16 bits value */
7#  define endian_le16(x)        (x)
8/** @this reads a big endian 32 bits value */
9#  define endian_le32(x)        (x)
10/** @this reads a big endian 64 bits value */
11//#  define endian_le64(x)      (x)
12/** @this reads a little endian 16 bits value */
13#  define endian_be16(x)        endian_swap16(x)
14/** @this reads a little endian 32 bits value */
15#  define endian_be32(x)        endian_swap32(x)
16/** @this reads a little endian 64 bits value */
17//#  define endian_be64(x)      endian_swap64(x)
18
19/** @internal */
20static inline uint16_t endian_swap16(uint16_t x)
21{
22  return (x >> 8) | (x << 8);
23}
24
25/** @internal */
26static inline uint32_t endian_swap32(uint32_t x)
27{
28  return (((x >> 24) & 0x000000ff) |
29          ((x >> 8 ) & 0x0000ff00) |
30          ((x << 8 ) & 0x00ff0000) |
31          ((x << 24) & 0xff000000));
32}
33
34/** @internal *//*
35static inline uint64_t __endian_swap64(uint64_t x)
36{
37  return (((uint64_t)endian_swap32(x      ) << 32) |
38          ((uint64_t)endian_swap32(x >> 32)      ));
39}*/
40
41static inline uint32_t srl_uint32_le_to_machine(uint32_t x)
42{
43        return endian_le32(x);
44}
45
46static inline uint32_t srl_uint32_machine_to_le(uint32_t x)
47{
48        return endian_le32(x);
49}
50
51static inline uint32_t srl_uint32_be_to_machine(uint32_t x)
52{
53        return endian_be32(x);
54}
55
56static inline uint32_t srl_uint32_machine_to_be(uint32_t x)
57{
58        return endian_be32(x);
59}
60
61static inline uint16_t srl_uint16_le_to_machine(uint16_t x)
62{
63        return endian_le16(x);
64}
65
66static inline uint16_t srl_uint16_machine_to_le(uint16_t x)
67{
68        return endian_le16(x);
69}
70
71static inline uint16_t srl_uint16_be_to_machine(uint16_t x)
72{
73        return endian_be16(x);
74}
75
76static inline uint16_t srl_uint16_machine_to_be(uint16_t x)
77{
78        return endian_be16(x);
79}
80
81
82#endif
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