csu3_am335x/EVSE/GPL/plc-utils.LNX.2.1.20/source/tools/memswap.c

/*====================================================================*
 *
 *   void memswap (void * memory1,  void * memory2, size_t extent);
 *
 *   memory.h
 *   
 *   exchange the contents of one memory region with that of another; 
 *   return no value; 
 *
 *   one application for this function is to exchange the source and
 *   destination addresses in an Ethernet frame to form a response
 *   message;
 *
 *   Motley Tools by Charles Maier <cmaier@cmassoc.net>;
 *   Copyright (c) 2001-2006 by Charles Maier Associates;
 *   Licensed under the Internet Software Consortium License;
 *   
 *--------------------------------------------------------------------*/

#ifndef MEMSWAP_SOURCE
#define MEMSWAP_SOURCE

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

void memswap (void * memory1, void * memory2, size_t extent) 

{ 
	register byte * byte1 = (byte *) (memory1); 
	register byte * byte2 = (byte *) (memory2); 
	if (memory1 != memory2) while (extent--) 
	{ 
		byte byte = * byte1; 
		* byte1++ = * byte2; 
		* byte2++ = byte; 
	} 
	return; 
} 

#endif