byte_order.h File Reference

#include "lib/sysdep/cpu.h"

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Macros
#define	LITTLE_ENDIAN   0x4321
#define	BIG_ENDIAN   0x1234
#define	BYTE_ORDER   BIG_ENDIAN
#define	FOURCC(a, b, c, d)
	convert 4 characters to u32 (at compile time) for easy comparison. More...
#define	FOURCC_BE(a, b, c, d)
	big-endian version of FOURCC More...
#define	FOURCC_LE(a, b, c, d)
	little-endian version of FOURCC More...
#define	FOURCC   FOURCC_BE
	convert 4 characters to u32 (at compile time) for easy comparison. More...
#define	to_le16(x)   swap16(x)
#define	to_le32(x)   swap32(x)
#define	to_le64(x)   swap64(x)
#define	to_be16(x)   (x)
#define	to_be32(x)   (x)
#define	to_be64(x)   (x)

Functions
u16	read_le16 (const void *p)
	read a little-endian number from memory into native byte order. More...
u32	read_le32 (const void *p)
u64	read_le64 (const void *p)
	see read_le16 More...
u16	read_be16 (const void *p)
	see read_le16 More...
u32	read_be32 (const void *p)
u64	read_be64 (const void *p)
	see read_be16 More...
void	write_le16 (void *p, u16 x)
	see read_be16 More...
void	write_le32 (void *p, u32 x)
void	write_le64 (void *p, u64 x)
	see write_le16 More...
void	write_be16 (void *p, u16 x)
	see write_le16 More...
void	write_be32 (void *p, u32 x)
void	write_be64 (void *p, u64 x)
	see write_be16 More...
u64	movzx_le64 (const u8 *p, size_t size)
	see write_be16 More...
u64	movzx_be64 (const u8 *p, size_t size)
i64	movsx_le64 (const u8 *p, size_t size)
	sign-extend <size> (truncated to 8) bytes of little-endian data to i64, starting at address <p> (need not be aligned). More...
i64	movsx_be64 (const u8 *p, size_t size)
u16	swap16 (const u16 x)
u32	swap32 (const u32 x)
u64	swap64 (const u64 x)

Macro Definition Documentation

BIG_ENDIAN

#define BIG_ENDIAN   0x1234

BYTE_ORDER

#define BYTE_ORDER   BIG_ENDIAN

FOURCC [1/2]

#define FOURCC	(		a,
			b,
			c,
			d
	)

convert 4 characters to u32 (at compile time) for easy comparison.

output is in native byte order; e.g. FOURCC_LE can be used instead.

FOURCC [2/2]

#define FOURCC   FOURCC_BE

convert 4 characters to u32 (at compile time) for easy comparison.

output is in native byte order; e.g. FOURCC_LE can be used instead.

FOURCC_BE

#define FOURCC_BE	(		a,
			b,
			c,
			d
	)

Value:

    ( ((u32)(u8)a) << 24 | ((u32)(u8)b) << 16 | \
    ((u32)(u8)c) << 8  | ((u32)(u8)d) << 0  )

big-endian version of FOURCC

FOURCC_LE

#define FOURCC_LE	(		a,
			b,
			c,
			d
	)

Value:

    ( ((u32)(u8)a) << 0  | ((u32)(u8)b) << 8  | \
    ((u32)(u8)c) << 16 | ((u32)(u8)d) << 24 )

little-endian version of FOURCC

LITTLE_ENDIAN

#define LITTLE_ENDIAN   0x4321

to_be16

#define to_be16

(

x

)

(x)

to_be32

#define to_be32

(

x

)

(x)

to_be64

#define to_be64

(

x

)

(x)

to_le16

#define to_le16

(

x

)

swap16(x)

to_le32

#define to_le32

(

x

)

swap32(x)

to_le64

#define to_le64

(

x

)

swap64(x)

Function Documentation

movsx_be64()

i64 movsx_be64	(	const u8 *	p,
		size_t	size
	)

movsx_le64()

i64 movsx_le64	(	const u8 *	p,
		size_t	size
	)

sign-extend <size> (truncated to 8) bytes of little-endian data to i64, starting at address <p> (need not be aligned).

movzx_be64()

u64 movzx_be64	(	const u8 *	p,
		size_t	size
	)

movzx_le64()

u64 movzx_le64	(	const u8 *	p,
		size_t	size
	)

see write_be16

zero-extend <size> (truncated to 8) bytes of little-endian data to u64, starting at address <p> (need not be aligned).

read_be16()

u16 read_be16

(

const void *

p

)

see read_le16

read a big-endian number from memory into native byte order.

read_be32()

u32 read_be32

(

const void *

p

)

read_be64()

u64 read_be64

(

const void *

p

)

see read_be16

read_le16()

u16 read_le16

(

const void *

p

)

read a little-endian number from memory into native byte order.

read_le32()

u32 read_le32

(

const void *

p

)

read_le64()

u64 read_le64

(

const void *

p

)

see read_le16

swap16()

u16 swap16

(

const u16

x

)

swap32()

u32 swap32

(

const u32

x

)

swap64()

u64 swap64

(

const u64

x

)

write_be16()

void write_be16	(	void *	p,
		u16	x
	)

see write_le16

write a big-endian number to memory in native byte order.

write_be32()

void write_be32	(	void *	p,
		u32	x
	)

write_be64()

void write_be64	(	void *	p,
		u64	x
	)

see write_be16

write_le16()

void write_le16	(	void *	p,
		u16	x
	)

see read_be16

write a little-endian number to memory in native byte order.

write_le32()

void write_le32	(	void *	p,
		u32	x
	)

write_le64()

void write_le64	(	void *	p,
		u64	x
	)

see write_le16