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

/*====================================================================*
 *
 *   signed strincr (void * memory, size_t extent, byte min, byte max);
 *
 *   memory.h
 *
 *   increment a multi-byte memory region; start at min and reset at
 *   max; return -1 if all bytes are max;
 *
 *   Motley Tools by Charles Maier <cmaier@cmassoc.net>;
 *   Copyright (c) 2001-2006 by Charles Maier Associates;
 *   Licensed under the Internet Software Consortium License;
 *
 *--------------------------------------------------------------------*/

#ifndef STRINCR_SOURCE
#define STRINCR_SOURCE

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

signed strincr (void * memory, register size_t extent, register byte min, register byte max) 

{ 
	register byte * offset = (byte *) (memory); 
	while (extent--) 
	{ 
		if (++ offset [extent] <= max) 
		{ 
			return (0); 
		} 
		offset [extent] = min; 
	} 
	return (- 1); 
} 

#endif