/** Normalizes the (from, to, incr) predicate to a predicate w/ positive increment. */
private void normalizePredicate() {
// check for positive increment
if (_incrVal.getLongValue() >= 0) return;
long lfrom = _fromVal.getLongValue();
long lto = _toVal.getLongValue();
long lincr = _incrVal.getLongValue();
_fromVal = new IntObject(lfrom - ((lfrom - lto) / lincr * lincr));
_toVal = new IntObject(lfrom);
_incrVal = new IntObject(-1 * lincr);
}
protected TaskPartitioner(
long taskSize, String iterVarName, IntObject fromVal, IntObject toVal, IntObject incrVal) {
_taskSize = taskSize;
_iterVarName = iterVarName;
_fromVal = fromVal;
_toVal = toVal;
_incrVal = incrVal;
_numIter =
(long)
Math.ceil(
((double) (_toVal.getLongValue() - _fromVal.getLongValue() + 1))
/ _incrVal.getLongValue());
}
protected TaskPartitioner(
long taskSize, String iterVarName, IntObject fromVal, IntObject toVal, IntObject incrVal) {
_taskSize = taskSize;
_iterVarName = iterVarName;
_fromVal = fromVal;
_toVal = toVal;
_incrVal = incrVal;
// normalize predicate if necessary
normalizePredicate();
// compute number of iterations
_numIter =
(long)
Math.ceil(
((double) (_toVal.getLongValue() - _fromVal.getLongValue() + 1))
/ _incrVal.getLongValue());
}