csu3_am335x/EVSE/GPL/open-plc-utils-0.3/tools/reverse.c

/*====================================================================*
 *
 *   void reverse (void * memory, size_t extent);
 *
 *   reverse the order of bytes in a multi-byte memory region;
 *
 *   Motley Tools by Charles Maier;
 *   Copyright (c) 2001-2006 by Charles Maier Associates;
 *   Licensed under the Internet Software Consortium License;
 *
 *--------------------------------------------------------------------*/

#ifndef REVERSE_SOURCE
#define REVERSE_SOURCE

#include "../tools/memory.h"

void reverse (void * memory, size_t extent)

{
	register byte * first = (byte *) (memory);
	register byte * final = first +  extent;
	while (first < final)
	{
		register byte byte = * first;
		* first++ = * -- final;
		* final = byte;
	}
	return;
}

#endif