bool _ijkNormalizeCouldOverflow()

in h3_coordijk.c [217:246]

• 22 lines of code
• 6 McCabe index (conditional complexity)

bool _ijkNormalizeCouldOverflow(const CoordIJK *ijk) {
    // Check for the possibility of overflow
    int max, min;
    if (ijk->i > ijk->j) {
        max = ijk->i;
        min = ijk->j;
    } else {
        max = ijk->j;
        min = ijk->i;
    }
    if (min < 0) {
        // Only if the min is less than 0 will the resulting number be larger
        // than max. If min is positive, then max is also positive, and a
        // positive signed integer minus another positive signed integer will
        // not overflow.
        if (ADD_INT32S_OVERFLOWS(max, min)) {
            // max + min would overflow
            return true;
        }
        if (SUB_INT32S_OVERFLOWS(0, min)) {
            // 0 - INT32_MIN would overflow
            return true;
        }
        if (SUB_INT32S_OVERFLOWS(max, min)) {
            // max - min would overflow
            return true;
        }
    }
    return false;
}