MathUtils addAndCheck and subAndCheck for long values
-----------------------------------------------------
Key: MATH-154
URL: http://issues.apache.org/jira/browse/MATH-154
Project: Commons Math
Issue Type: Improvement
Affects Versions: Nightly Builds, 1.1 Final
Reporter: Remi Arntzen
public static long addAndCheck(long x, long y) {
BigInteger s = BigInteger.valueOf(x).add(BigInteger.valueOf(y);
if (s.bitLength() + 1 > Long.SIZE) {
throw new ArithmeticException("overflow: add");
}
return s.longValue();
}
public static long subAndCheck(long x, long y) {
BigInteger s = BigInteger.valueOf(x).subtract(BigInteger.valueOf(y));
if (s.bitLength() + 1 > Long.SIZE) {
throw new ArithmeticException("overflow: add");
}
return s.longValue();
}
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