shuffle-def.h File Reference

Shuffle preprocessor metaprogram. More...

#include "host.h"
#include "random.h"
#include <assert.h>

Defines
#define	VL_SHUFFLE_array   VL_SHUFFLE_type*
#define	VL_SHUFFLE_prefix   ShufflePrefix
#define	VL_SHUFFLE_type   ShuffleType
#define	VL_SHUFFLE_array   ShuffleType*
Functions
void	VL_SHUFFLE_swap (VL_SHUFFLE_array array, vl_uindex indexA, vl_uindex indexB)
	Swap two array elements.
void	VL_SHUFFLE_shuffle (VL_SHUFFLE_array array, vl_size size, VlRand *rand)
	Shuffle.

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Detailed Description

Author:

Andrea Vedaldi

Todo:

large array compatibility.

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Define Documentation

#define VL_SHUFFLE_array   VL_SHUFFLE_type*

Data type of the shuffle container

#define VL_SHUFFLE_array   ShuffleType*

Data type of the shuffle container

#define VL_SHUFFLE_prefix   ShufflePrefix

Prefix of the shuffle functions

#define VL_SHUFFLE_type   ShuffleType

Data type of the shuffle elements

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Function Documentation

void VL_SHUFFLE_shuffle	(	VL_SHUFFLE_array	array,
		vl_size	size,
		VlRand *	rand
	)		[inline]

Parameters:

array	(in/out) pointer to the array.
size	size of the array.
rand	random number generator to use.

The function randomly permutes the array.

void VL_SHUFFLE_swap	(	VL_SHUFFLE_array	array,
		vl_uindex	indexA,
		vl_uindex	indexB
	)		[inline]

Parameters:

array	shuffle array.
indexA	index of the first element to swap.
indexB	index of the second element to swap.

The function swaps the two elements a and @ b. The function uses a temporary element of type VL_SHUFFLE_type and the copy operator =.