static inline void CKCSConstrain()

in RenderCore/Geometry/RCComponentSize.mm [24:54]

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

static inline void CKCSConstrain(CGFloat minVal, CGFloat exactVal, CGFloat maxVal, CGFloat *outMin, CGFloat *outMax) noexcept
{
    RCCAssertConstrainedValue(minVal);
    RCCAssertConstrainedValue(maxVal);
    // Avoid use of min/max primitives since they're harder to reason
    // about in the presence of NaN (in exactVal)
    // Follow CSS: min overrides max overrides exact.

    // Begin with the min/max range
    *outMin = minVal;
    *outMax = maxVal;
    if (maxVal <= minVal) {
        // min overrides max and exactVal is irrelevant
        *outMax = minVal;
        return;
    }
    if (isnan(exactVal) || isinf(exactVal)) {
        // no exact value, so leave as a min/max range
        return;
    }
    if (exactVal > maxVal) {
        // clip to max value
        *outMin = maxVal;
    } else if (exactVal < minVal) {
        // clip to min value
        *outMax = minVal;
    } else {
        // use exact value
        *outMin = *outMax = exactVal;
    }
}