source: rtems/c/src/lib/libnetworking/machine/endian.h @ 3f098aed

4.104.114.84.95
Last change on this file since 3f098aed was 3f098aed, checked in by Joel Sherrill <joel.sherrill@…>, on 08/20/98 at 14:37:17

FreeBSD stack compiles for the first time (except libc/strsep.c).
  • Property mode set to 100644
File size: 1.3 KB
Line 
1#ifndef _MACHINE_ENDIAN_H_
2#define _MACHINE_ENDIAN_H_
3
4#include <rtems/score/cpu.h>
5
6/*
7 * BSD-style endian declaration
8 */
9#define BIG_ENDIAN      4321
10#define LITTLE_ENDIAN   1234
11
12#if CPU_BIG_ENDIAN
13# define BYTE_ORDER BIG_ENDIAN
14#elif CPU_LITTLE_ENDIAN
15# define BYTE_ORDER LITTLE_ENDIAN
16#else
17# error "Can't decide which end is which!"
18#endif
19
20#if ( CPU_HAS_OWN_HOST_TO_NETWORK_ROUTINES == FALSE )
21
22#if ( CPU_BIG_ENDIAN == TRUE )
23
24/*
25 *  Very simply on big endian CPUs
26 */
27
28#define       ntohl(_x)        (_x)
29#define       ntohs(_x)        (_x)
30#define       htonl(_x)        (_x)
31#define       htons(_x)        (_x)
32
33#define NTOHS(x)
34#define HTONS(x)
35#define NTOHL(x)
36#define HTONL(x)
37
38#elif ( CPU_LITTLE_ENDIAN == TRUE )
39
40/*
41 *  A little more complicated on little endian CPUs
42 */
43
44#define       ntohl(_x)        ((long)  CPU_swap_u32((unsigned32)_x))
45#define       ntohs(_x)        ((short) CPU_swap_u16((unsigned16)_x))
46#define       htonl(_x)        ((long)  CPU_swap_u32((unsigned32)_x))
47#define       htons(_x)        ((short) CPU_swap_u16((unsigned16)_x))
48
49#define NTOHS(x) (x) = ntohs(x)
50#define HTONS(x) (x) = htons(x)
51#define NTOHL(x) (x) = ntohl(x)
52#define HTONL(x) (x) = htonl(x)
53
54#else
55#error "Unknown endian-ness for this cpu"
56#endif
57
58#endif  /* CPU_HAS_OWN_HOST_TO_NETWORK_ROUTINES */
59
60#endif /* _MACHINE_ENDIAN_H_ */
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