overflow.py

MAX_32_UINT = 4294967295
MAX_32_SINT = 2147483648
MIN_32_SINT = -2147483647


def would_overflow_multiplication(in_type, a, b, sign=1):
    """
Checks if a * b would overflow
"""
    if in_type is "deci":
        if sign is 1:
            if a > (MAX_32_SINT / b):
                return True
        else:
            if abs(a) > abs(MIN_32_SINT) / abs(b):
                return True
    else:
        if a > (MAX_32_UINT / b):
            return True

    return False


def would_overflow_addition(in_type, a, b, sign=1):
    """
Checks if a + b would overflow
"""
    if in_type is "deci":
        if sign is 1:
            if a > (MAX_32_SINT - b):
                return True
        else:
            if abs(a) > abs(MIN_32_SINT) - abs(b):
                return True
    else:
        if a > (MAX_32_UINT - b):
            return True

    return False