month-size

C++ implementation

#pragma XOD dirtieness disable

node {
    uint8_t leap(uint32_t year) {
        return (year % 400 == 0) || (year % 100 != 0) && (year % 4 == 0);
    }

    void evaluate(Context ctx) {
        uint8_t l = leap(getValue<input_YEAR>(ctx));
        switch ((uint8_t) getValue<input_MON>(ctx)) {
            case 2:
                emitValue<output_SIZE>(ctx, 28 + l);
                break;
            case 4:
            case 6:
            case 9:
            case 11:
                emitValue<output_SIZE>(ctx, 30);
                break;
            default:
                emitValue<output_SIZE>(ctx, 31);
                break;
        }
        emitValue<output_LEAP>(ctx, l);
    }
}

Tabular tests