helper.h File Reference

#include <byteswap.h>

Go to the source code of this file.

Defines
#define	UINT32_BE(a)   bswap_32(get_misalign((unsigned int *)(a)))
#define	UINT16_BE(a)   bswap_16(get_misalign((unsigned short *)(a)))
#define	UINT8_BE(a)   *((unsigned char *)a)
#define	BYTE4_BE(a, b)   put_misalign(bswap_32(b),(unsigned int *)(a))
#define	BYTE2_BE(a, b)   put_misalign(bswap_16(b),(unsigned short *)(a))
#define	BYTE1_BE(a, b)   *(unsigned char *)(a)=(b)
#define	UINT32_LE(a)   get_misalign((unsigned int *)(a))
#define	UINT16_LE(a)   get_misalign((unsigned short *)(a))
#define	UINT8_LE(a)   *((unsigned char *)a)
#define	BYTE4_LE(a, b)   put_misalign(b,(unsigned int *)(a))
#define	BYTE2_LE(a, b)   put_misalign(b,(unsigned short *)(a))
#define	BYTE1_LE(a, b)   *(unsigned char *)(a)=(b)
#define	__ror16_const(x, xx)   ((((x)&0xFFFF)>>(xx)) | ((x)<<(16-(xx))))
#define	__rol16_const(x, xx)   (((x)<<(xx)) | (((x)&0xFFFF)>>(16-(xx))))
#define	__sn8_const(b)   ((((b)>>4)&0xf) + (((b)&0xf)<<4))
#define	ror16(x, xx)   __ror16_const(x,xx)
#define	rol16(x, xx)   __rol16_const(x,xx)
#define	sn8(b)   __sn8_const(b)
#define	xxor(d, l, v1, v2)   __xxor(d,l,v1,v2)
Functions
template<class T >
T	get_misalign (T *p)
template<class T >
void	put_misalign (unsigned int v, T *p)
static void	__xxor (unsigned char *data, int len, const unsigned char *v1, const unsigned char *v2)

---

Define Documentation

#define __rol16_const	(		x,
			xx
	)		(((x)<<(xx)) | (((x)&0xFFFF)>>(16-(xx))))

Definition at line 51 of file helper.h.

#define __ror16_const	(		x,
			xx
	)		((((x)&0xFFFF)>>(xx)) | ((x)<<(16-(xx))))

Definition at line 50 of file helper.h.

#define __sn8_const

(

b

)

((((b)>>4)&0xf) + (((b)&0xf)<<4))

Definition at line 52 of file helper.h.

#define BYTE1_BE	(		a,
			b
	)		*(unsigned char *)(a)=(b)

Definition at line 41 of file helper.h.

#define BYTE1_LE	(		a,
			b
	)		*(unsigned char *)(a)=(b)

Definition at line 48 of file helper.h.

#define BYTE2_BE	(		a,
			b
	)		put_misalign(bswap_16(b),(unsigned short *)(a))

Definition at line 40 of file helper.h.

#define BYTE2_LE	(		a,
			b
	)		put_misalign(b,(unsigned short *)(a))

Definition at line 47 of file helper.h.

#define BYTE4_BE	(		a,
			b
	)		put_misalign(bswap_32(b),(unsigned int *)(a))

Definition at line 39 of file helper.h.

#define BYTE4_LE	(		a,
			b
	)		put_misalign(b,(unsigned int *)(a))

Definition at line 46 of file helper.h.

#define rol16	(		x,
			xx
	)		__rol16_const(x,xx)

Definition at line 72 of file helper.h.

#define ror16	(		x,
			xx
	)		__ror16_const(x,xx)

Definition at line 71 of file helper.h.

#define sn8

(

b

)

__sn8_const(b)

Definition at line 73 of file helper.h.

#define UINT16_BE

(

a

)

bswap_16(get_misalign((unsigned short *)(a)))

Definition at line 37 of file helper.h.

#define UINT16_LE

(

a

)

get_misalign((unsigned short *)(a))

Definition at line 44 of file helper.h.

#define UINT32_BE

(

a

)

bswap_32(get_misalign((unsigned int *)(a)))

Definition at line 36 of file helper.h.

#define UINT32_LE

(

a

)

get_misalign((unsigned int *)(a))

Definition at line 43 of file helper.h.

#define UINT8_BE

(

a

)

*((unsigned char *)a)

Definition at line 38 of file helper.h.

#define UINT8_LE

(

a

)

*((unsigned char *)a)

Definition at line 45 of file helper.h.

#define xxor	(		d,
			l,
			v1,
			v2
	)		__xxor(d,l,v1,v2)

Definition at line 93 of file helper.h.

---

Function Documentation

static void __xxor	(	unsigned char *	data,
		int	len,
		const unsigned char *	v1,
		const unsigned char *	v2
	)		[inline, static]

Definition at line 77 of file helper.h.

{
  switch(len) { // looks ugly, but the compiler can optimize it very well ;)
    case 16:
      *((unsigned int *)data+3) = *((unsigned int *)v1+3) ^ *((unsigned int *)v2+3);
      *((unsigned int *)data+2) = *((unsigned int *)v1+2) ^ *((unsigned int *)v2+2);
    case 8:
      *((unsigned int *)data+1) = *((unsigned int *)v1+1) ^ *((unsigned int *)v2+1);
    case 4:
      *((unsigned int *)data+0) = *((unsigned int *)v1+0) ^ *((unsigned int *)v2+0);
      break;
    default:
      while(len--) *data++ = *v1++ ^ *v2++;
      break;
    }
}

template<class T >

T get_misalign

(

T *

p

)

[inline]

Definition at line 29 of file helper.h.

References __attribute__.

{ struct s { T v; } __attribute__((packed)); return ((s *)p)->v; }

template<class T >

void put_misalign	(	unsigned int	v,
		T *	p
	)		[inline]

Definition at line 32 of file helper.h.

References __attribute__.

{ struct s { T v; } __attribute__((packed)); ((s *)p)->v = v; }