swap.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "include/swap.h"

Include dependency graph for swap.c:

Functions
int	little_endian ()
void	swap (void *from, void *to, int size)
void	swabip (void *buf, int size)
void	swawbip (void *buf, int size)
void	swawip (void *buf, int size)
void	printf32bits (void *buf)

Function Documentation

little_endian()

int little_endian

(

)

Check whether current platform uses little endian byte order. See H&S Sec. 6.1.2 pp. 163-4.

Returns

Returns 1, if current platform is little endian, and 0 if not.

printf32bits()

void printf32bits

(

void *

buf

)

Printfs as bit string the 32-bit variable pointed to by buf. Far from being optimized, thus only for testing and development purposes.

Parameters

buf	Pointer to memory

swabip()

void swabip	(	void *	buf,
		int	size
	)

In-place swab, replaces the non-ANSI function swab(), which may not work if data is overlapping.

Parameters

buf	Pointer to memory
size	Size of buf in bytes

swap()

void swap	(	void *	from,
		void *	to,
		int	size
	)

Swaps the specified short int, int, long int, float, or double from little endian to big endian or vice versa. Arguments are allowed to overlap.

Parameters

from	Pointer to a short int, int, long int, float, or double variable
to	Pointer to a short int, int, long int, float, or double variable
size	Size of from and to (byte nr) must be 1, 2, 4 or 8.

References swap().

Referenced by intExpand(), and swap().

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swawbip()

void swawbip	(	void *	buf,
		int	size
	)

In-place swab and swaw, switches words and bytes from an array of 4-byte ints or floats.

Parameters

buf	Pointer to memory
size	Size of buf in bytes

swawip()

void swawip	(	void *	buf,
		int	size
	)

In-place swaw, switches words (but not bytes) from an array of 4-byte ints or floats.

Parameters

buf	Pointer to memory
size	Size of buf in bytes