endian: #define __BYTE_ORDER

Linux does not define __BYTE_ORDER in its endian header files which makes some header files bend backwards to get at the current endian. Lets #define __BYTE_ORDER in big_endian.h/litte_endian.h to make it easier for header files that are used in user space too. In userspace the convention is that 1. _both_ __LITTLE_ENDIAN and __BIG_ENDIAN are defined, 2. you have to test for e.g. __BYTE_ORDER == __BIG_ENDIAN.

Joakim Tjernlund committed 16 years ago

Commit b3b77c81 parent e47103b9 files · +8 −31Browse files

Showing the changes to include/linux/byteorder (2 of 9 files). Show all

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2 files

include/linux/byteorder/big_endian.h +3 −0
include/linux/byteorder/little_endian.h +3 −0

include/linux/byteorder/big_endian.h+3−0

@@ -7,6 +7,9 @@ · 6 unmodified lines
7	7	#ifndef __BIG_ENDIAN_BITFIELD
8	8	#define __BIG_ENDIAN_BITFIELD
9	9	#endif
	10	+#ifndef __BYTE_ORDER
	11	+#define __BYTE_ORDER __BIG_ENDIAN
	12	+#endif
10	13
11	14	#include <linux/types.h>
12	15	#include <linux/swab.h>

include/linux/byteorder/little_endian.h+3−0

@@ -7,6 +7,9 @@ · 6 unmodified lines
7	7	#ifndef __LITTLE_ENDIAN_BITFIELD
8	8	#define __LITTLE_ENDIAN_BITFIELD
9	9	#endif
	10	+#ifndef __BYTE_ORDER
	11	+#define __BYTE_ORDER __LITTLE_ENDIAN
	12	+#endif
10	13
11	14	#include <linux/types.h>
12	15	#include <linux/swab.h>