rohc_bit_ops.h File Reference

Bitwised operations for ROHC compression/decompression. More...

#include "config.h"

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Macros
#define	GET_BIT_0(x)   ((*(x)) & 0x01)
#define	GET_BIT_1(x)   ((*(x)) & 0x02)
#define	GET_BIT_2(x)   ((*(x)) & 0x04)
#define	GET_BIT_3(x)   ((*(x)) & 0x08)
#define	GET_BIT_4(x)   ((*(x)) & 0x10)
#define	GET_BIT_5(x)   ((*(x)) & 0x20)
#define	GET_BIT_6(x)   ((*(x)) & 0x40)
#define	GET_BIT_7(x)   ((*(x)) & 0x80)
#define	GET_BIT_0_1(x)   ((*(x)) & 0x03)
#define	GET_BIT_0_2(x)   ((*(x)) & 0x07)
#define	GET_BIT_0_4(x)   ((*(x)) & 0x1f)
#define	GET_BIT_0_3(x)   ((*(x)) & 0x0f)
#define	GET_BIT_0_5(x)   ((*(x)) & 0x3f)
#define	GET_BIT_0_6(x)   ((*(x)) & 0x7f)
#define	GET_BIT_0_7(x)   ((*(x)) & 0xff)
#define	GET_BIT_1_7(x)   ( ((*(x)) & 0xfe) >> 1 )
#define	GET_BIT_2_5(x)   ( ((*(x)) & 0x3c) >> 2 )
#define	GET_BIT_3_4(x)   ( ((*(x)) & 0x18) >> 3 )
#define	GET_BIT_3_5(x)   ( ((*(x)) & 0x38) >> 3 )
#define	GET_BIT_3_6(x)   ( ((*(x)) & 0x78) >> 3 )
#define	GET_BIT_3_7(x)   ( ((*(x)) & 0xf8) >> 3 )
#define	GET_BIT_4_7(x)   ( ((*(x)) & 0xf0) >> 4 )
#define	GET_BIT_5_7(x)   ( ((*(x)) & 0xe0) >> 5 )
#define	GET_BIT_6_7(x)   ( ((*(x)) & 0xc0) >> 6 )
#define	GET_BIT_4_6(x)   ( ((*(x)) & 0x70) >> 4 )
#define	GET_REAL(x)   ((x) ? 1 : 0)
	Convert GET_BIT_* values to 0 or 1. More...
#define	GET_BOOL(x)   ((x) ? true : false)
	Convert GET_BIT_* values to boolean. More...
#define	GET_NEXT_16_BITS(x)   ((((*((x) + 1)) << 8) & 0xff00) | ((*(x)) & 0x00ff))
	Get the next 16 bits at the given memory location in Network Byte Order. More...
#define	APPEND_BITS(field_descr, ext_no, field, field_nr, bits, bits_nr, max)
#define	APPEND_SN_BITS(ext_no, base, bits, bits_nr)
#define	APPEND_OUTER_IP_ID_BITS(ext_no, base, bits, bits_nr)
#define	APPEND_INNER_IP_ID_BITS(ext_no, base, bits, bits_nr)
#define	APPEND_TS_BITS(ext_no, base, bits, bits_nr)

Detailed Description

Bitwised operations for ROHC compression/decompression.

Author

Didier Barvaux didie.nosp@m.r.ba.nosp@m.rvaux.nosp@m.@tou.nosp@m.louse.nosp@m..viv.nosp@m.eris..nosp@m.com

Didier Barvaux didie.nosp@m.r@ba.nosp@m.rvaux.nosp@m..org

Macro Definition Documentation

APPEND_BITS

#define APPEND_BITS	(		field_descr,
			ext_no,
			field,
			field_nr,
			bits,
			bits_nr,
			max
	)

Append new LSB bits to already extracted bits

APPEND_INNER_IP_ID_BITS

#define APPEND_INNER_IP_ID_BITS	(		ext_no,
			base,
			bits,
			bits_nr
	)

Value:

APPEND_BITS(inner IP-ID, ext_no, \
                    (base)->inner_ip.id, (base)->inner_ip.id_nr, \
                    (bits), (bits_nr), 16)

Inner IP-ID: append new LSB bits to already extracted bits

APPEND_OUTER_IP_ID_BITS

#define APPEND_OUTER_IP_ID_BITS	(		ext_no,
			base,
			bits,
			bits_nr
	)

Value:

APPEND_BITS(outer IP-ID, ext_no, \
                    (base)->outer_ip.id, (base)->outer_ip.id_nr, \
                    (bits), (bits_nr), 16)

Outer IP-ID: append new LSB bits to already extracted bits

APPEND_SN_BITS

#define APPEND_SN_BITS	(		ext_no,
			base,
			bits,
			bits_nr
	)

Value:

APPEND_BITS(SN, ext_no, \
                    (base)->sn, (base)->sn_nr, \
                    (bits), (bits_nr), 32)

SN: append new LSB bits to already extracted bits

APPEND_TS_BITS

#define APPEND_TS_BITS	(		ext_no,
			base,
			bits,
			bits_nr
	)

Value:

APPEND_BITS(TS, ext_no, \
                    (base)->ts, (base)->ts_nr, \
                    (bits), (bits_nr), 32)

TS: append new LSB bits to already extracted bits

GET_BIT_0

#define GET_BIT_0

(

x

)

((*(x)) & 0x01)

GET_BIT_0_1

#define GET_BIT_0_1

(

x

)

((*(x)) & 0x03)

GET_BIT_0_2

#define GET_BIT_0_2

(

x

)

((*(x)) & 0x07)

GET_BIT_0_3

#define GET_BIT_0_3

(

x

)

((*(x)) & 0x0f)

GET_BIT_0_4

#define GET_BIT_0_4

(

x

)

((*(x)) & 0x1f)

GET_BIT_0_5

#define GET_BIT_0_5

(

x

)

((*(x)) & 0x3f)

GET_BIT_0_6

#define GET_BIT_0_6

(

x

)

((*(x)) & 0x7f)

GET_BIT_0_7

#define GET_BIT_0_7

(

x

)

((*(x)) & 0xff)

GET_BIT_1

#define GET_BIT_1

(

x

)

((*(x)) & 0x02)

GET_BIT_1_7

#define GET_BIT_1_7

(

x

)

( ((*(x)) & 0xfe) >> 1 )

GET_BIT_2

#define GET_BIT_2

(

x

)

((*(x)) & 0x04)

GET_BIT_2_5

#define GET_BIT_2_5

(

x

)

( ((*(x)) & 0x3c) >> 2 )

GET_BIT_3

#define GET_BIT_3

(

x

)

((*(x)) & 0x08)

GET_BIT_3_4

#define GET_BIT_3_4

(

x

)

( ((*(x)) & 0x18) >> 3 )

GET_BIT_3_5

#define GET_BIT_3_5

(

x

)

( ((*(x)) & 0x38) >> 3 )

GET_BIT_3_6

#define GET_BIT_3_6

(

x

)

( ((*(x)) & 0x78) >> 3 )

GET_BIT_3_7

#define GET_BIT_3_7

(

x

)

( ((*(x)) & 0xf8) >> 3 )

GET_BIT_4

#define GET_BIT_4

(

x

)

((*(x)) & 0x10)

GET_BIT_4_6

#define GET_BIT_4_6

(

x

)

( ((*(x)) & 0x70) >> 4 )

GET_BIT_4_7

#define GET_BIT_4_7

(

x

)

( ((*(x)) & 0xf0) >> 4 )

GET_BIT_5

#define GET_BIT_5

(

x

)

((*(x)) & 0x20)

GET_BIT_5_7

#define GET_BIT_5_7

(

x

)

( ((*(x)) & 0xe0) >> 5 )

GET_BIT_6

#define GET_BIT_6

(

x

)

((*(x)) & 0x40)

GET_BIT_6_7

#define GET_BIT_6_7

(

x

)

( ((*(x)) & 0xc0) >> 6 )

GET_BIT_7

#define GET_BIT_7

(

x

)

((*(x)) & 0x80)

GET_BOOL

#define GET_BOOL

(

x

)

((x) ? true : false)

Convert GET_BIT_* values to boolean.

example: GET_BOOL(GET_BIT_5(data_ptr));

GET_NEXT_16_BITS

#define GET_NEXT_16_BITS

(

x

)

((((*((x) + 1)) << 8) & 0xff00) | ((*(x)) & 0x00ff))

Get the next 16 bits at the given memory location in Network Byte Order.

GET_REAL

#define GET_REAL

(

x

)

((x) ? 1 : 0)

Convert GET_BIT_* values to 0 or 1.

example: GET_REAL(GET_BIT_5(data_ptr));