/*====================================================================*
*
* signed strdecr (void * memory, size_t extent, byte min, byte max);
*
* memory.h
*
* decrement a multi-byte memory region; start at max and reset at
* min; return -1 if all bytes are min;
*
* Motley Tools by Charles Maier <cmaier@cmassoc.net>;
* Copyright (c) 2001-2006 by Charles Maier Associates;
* Licensed under the Internet Software Consortium License;
*
*--------------------------------------------------------------------*/
#ifndef STRDECR_SOURCE
#define STRDECR_SOURCE
#include "../tools/memory.h"
signed strdecr (void * memory, register size_t extent, register byte min, register byte max)
{
register byte * offset = (byte *)(memory);
while (extent--)
{
if (-- offset [extent] >= min)
{
return (0);
}
offset [extent] = max;
}
return (-1);
}
#endif