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#ifndef __INC_ENDIANFREE_H
#define __INC_ENDIANFREE_H
/*
* Call endian free function when
* 1. Read/write packet content.
* 2. Before write integer to IO.
* 3. After read integer from IO.
*/
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
#ifndef bool
typedef enum{false = 0, true} bool;
#endif
#endif
#define __MACHINE_LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
#define __MACHINE_BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net, ppc */
#define BYTE_ORDER __MACHINE_LITTLE_ENDIAN
#if BYTE_ORDER == __MACHINE_LITTLE_ENDIAN
// Convert data
#define EF1Byte(_val) ((u8)(_val))
#define EF2Byte(_val) ((u16)(_val))
#define EF4Byte(_val) ((u32)(_val))
#else
// Convert data
#define EF1Byte(_val) ((u8)(_val))
#define EF2Byte(_val) (((((u16)(_val))&0x00ff)<<8)|((((u16)(_val))&0xff00)>>8))
#define EF4Byte(_val) (((((u32)(_val))&0x000000ff)<<24)|\
((((u32)(_val))&0x0000ff00)<<8)|\
((((u32)(_val))&0x00ff0000)>>8)|\
((((u32)(_val))&0xff000000)>>24))
#endif
// Read data from memory
#define ReadEF1Byte(_ptr) EF1Byte(*((u8 *)(_ptr)))
#define ReadEF2Byte(_ptr) EF2Byte(*((u16 *)(_ptr)))
#define ReadEF4Byte(_ptr) EF4Byte(*((u32 *)(_ptr)))
// Write data to memory
#define WriteEF1Byte(_ptr, _val) (*((u8 *)(_ptr)))=EF1Byte(_val)
#define WriteEF2Byte(_ptr, _val) (*((u16 *)(_ptr)))=EF2Byte(_val)
#define WriteEF4Byte(_ptr, _val) (*((u32 *)(_ptr)))=EF4Byte(_val)
// Convert Host system specific byte ording (litten or big endia) to Network byte ording (big endian).
// 2006.05.07, by rcnjko.
#if BYTE_ORDER == __MACHINE_LITTLE_ENDIAN
#define H2N1BYTE(_val) ((u8)(_val))
#define H2N2BYTE(_val) (((((u16)(_val))&0x00ff)<<8)|\
((((u16)(_val))&0xff00)>>8))
#define H2N4BYTE(_val) (((((u32)(_val))&0x000000ff)<<24)|\
((((u32)(_val))&0x0000ff00)<<8) |\
((((u32)(_val))&0x00ff0000)>>8) |\
((((u32)(_val))&0xff000000)>>24))
#else
#define H2N1BYTE(_val) ((u8)(_val))
#define H2N2BYTE(_val) ((u16)(_val))
#define H2N4BYTE(_val) ((u32)(_val))
#endif
// Convert from Network byte ording (big endian) to Host system specific byte ording (litten or big endia).
// 2006.05.07, by rcnjko.
#if BYTE_ORDER == __MACHINE_LITTLE_ENDIAN
#define N2H1BYTE(_val) ((u8)(_val))
#define N2H2BYTE(_val) (((((u16)(_val))&0x00ff)<<8)|\
((((u16)(_val))&0xff00)>>8))
#define N2H4BYTE(_val) (((((u32)(_val))&0x000000ff)<<24)|\
((((u32)(_val))&0x0000ff00)<<8) |\
((((u32)(_val))&0x00ff0000)>>8) |\
((((u32)(_val))&0xff000000)>>24))
#else
#define N2H1BYTE(_val) ((u8)(_val))
#define N2H2BYTE(_val) ((u16)(_val))
#define N2H4BYTE(_val) ((u32)(_val))
#endif
//
// Example:
// BIT_LEN_MASK_32(0) => 0x00000000
// BIT_LEN_MASK_32(1) => 0x00000001
// BIT_LEN_MASK_32(2) => 0x00000003
// BIT_LEN_MASK_32(32) => 0xFFFFFFFF
//
#define BIT_LEN_MASK_32(__BitLen) (0xFFFFFFFF >> (32 - (__BitLen)))
//
// Example:
// BIT_OFFSET_LEN_MASK_32(0, 2) => 0x00000003
// BIT_OFFSET_LEN_MASK_32(16, 2) => 0x00030000
//
#define BIT_OFFSET_LEN_MASK_32(__BitOffset, __BitLen) (BIT_LEN_MASK_32(__BitLen) << (__BitOffset))
//
// Description:
// Return 4-byte value in host byte ordering from
// 4-byte pointer in litten-endian system.
//
#define LE_P4BYTE_TO_HOST_4BYTE(__pStart) (EF4Byte(*((u32 *)(__pStart))))
//
// Description:
// Translate subfield (continuous bits in little-endian) of 4-byte value in litten byte to
// 4-byte value in host byte ordering.
//
#define LE_BITS_TO_4BYTE(__pStart, __BitOffset, __BitLen) \
( \
( LE_P4BYTE_TO_HOST_4BYTE(__pStart) >> (__BitOffset) ) \
& \
BIT_LEN_MASK_32(__BitLen) \
)
//
// Description:
// Mask subfield (continuous bits in little-endian) of 4-byte value in litten byte oredering
// and return the result in 4-byte value in host byte ordering.
//
#define LE_BITS_CLEARED_TO_4BYTE(__pStart, __BitOffset, __BitLen) \
( \
LE_P4BYTE_TO_HOST_4BYTE(__pStart) \
& \
( ~BIT_OFFSET_LEN_MASK_32(__BitOffset, __BitLen) ) \
)
//
// Description:
// Set subfield of little-endian 4-byte value to specified value.
//
#define SET_BITS_TO_LE_4BYTE(__pStart, __BitOffset, __BitLen, __Value) \
*((u32 *)(__pStart)) = \
EF4Byte( \
LE_BITS_CLEARED_TO_4BYTE(__pStart, __BitOffset, __BitLen) \
| \
( (((u32)__Value) & BIT_LEN_MASK_32(__BitLen)) << (__BitOffset) ) \
);
#define BIT_LEN_MASK_16(__BitLen) \
(0xFFFF >> (16 - (__BitLen)))
#define BIT_OFFSET_LEN_MASK_16(__BitOffset, __BitLen) \
(BIT_LEN_MASK_16(__BitLen) << (__BitOffset))
#define LE_P2BYTE_TO_HOST_2BYTE(__pStart) \
(EF2Byte(*((u16 *)(__pStart))))
#define LE_BITS_TO_2BYTE(__pStart, __BitOffset, __BitLen) \
( \
( LE_P2BYTE_TO_HOST_2BYTE(__pStart) >> (__BitOffset) ) \
& \
BIT_LEN_MASK_16(__BitLen) \
)
#define LE_BITS_CLEARED_TO_2BYTE(__pStart, __BitOffset, __BitLen) \
( \
LE_P2BYTE_TO_HOST_2BYTE(__pStart) \
& \
( ~BIT_OFFSET_LEN_MASK_16(__BitOffset, __BitLen) ) \
)
#define SET_BITS_TO_LE_2BYTE(__pStart, __BitOffset, __BitLen, __Value) \
*((u16 *)(__pStart)) = \
EF2Byte( \
LE_BITS_CLEARED_TO_2BYTE(__pStart, __BitOffset, __BitLen) \
| \
( (((u16)__Value) & BIT_LEN_MASK_16(__BitLen)) << (__BitOffset) ) \
);
#define BIT_LEN_MASK_8(__BitLen) \
(0xFF >> (8 - (__BitLen)))
#define BIT_OFFSET_LEN_MASK_8(__BitOffset, __BitLen) \
(BIT_LEN_MASK_8(__BitLen) << (__BitOffset))
#define LE_P1BYTE_TO_HOST_1BYTE(__pStart) \
(EF1Byte(*((u8 *)(__pStart))))
#define LE_BITS_TO_1BYTE(__pStart, __BitOffset, __BitLen) \
( \
( LE_P1BYTE_TO_HOST_1BYTE(__pStart) >> (__BitOffset) ) \
& \
BIT_LEN_MASK_8(__BitLen) \
)
#define LE_BITS_CLEARED_TO_1BYTE(__pStart, __BitOffset, __BitLen) \
( \
LE_P1BYTE_TO_HOST_1BYTE(__pStart) \
& \
( ~BIT_OFFSET_LEN_MASK_8(__BitOffset, __BitLen) ) \
)
#define SET_BITS_TO_LE_1BYTE(__pStart, __BitOffset, __BitLen, __Value) \
*((u8 *)(__pStart)) = \
EF1Byte( \
LE_BITS_CLEARED_TO_1BYTE(__pStart, __BitOffset, __BitLen) \
| \
( (((u8)__Value) & BIT_LEN_MASK_8(__BitLen)) << (__BitOffset) ) \
);
#endif // #ifndef __INC_ENDIANFREE_H
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