Function execute_binary2

FluidNC/src/Expression.cpp:152–207

! \brief Executes the operations: +, -, AND, OR, XOR, EQ, NE, LT, LE, GT, GE The RS274/NGC manual does not say what the calculated value of the logical operations should be. This function calculates either 1.0 (meaning true) or 0.0 (meaning false). Any non-zero input value is taken as meaning true, and only 0.0 means false. \param lhs pointer to the left hand side operand and result. \param opera

\returns #Error::Ok enum value if processed without error, appropriate \ref Error enum value if not.
*/
static Error execute_binary2(float& lhs, ngc_binary_op_t operation, const float& rhs) {
    switch (operation) {
        case Binary_And2:
            lhs = ((lhs == 0.0f) || (rhs == 0.0f)) ? 0.0f : 1.0f;
            break;

        case Binary_ExclusiveOR:
            lhs = (((lhs == 0.0f) && (rhs != 0.0f)) || ((lhs != 0.0f) && (rhs == 0.0f))) ? 1.0f : 0.0f;
            break;

        case Binary_Minus:
            lhs = (lhs - rhs);
            break;

        case Binary_NotExclusiveOR:
            lhs = ((lhs != 0.0f) || (rhs != 0.0f)) ? 1.0f : 0.0f;
            break;

        case Binary_Plus:
            lhs = (lhs + rhs);
            break;

        case Binary_LT:
            lhs = (lhs < rhs) ? 1.0f : 0.0f;
            break;

        case Binary_EQ: {
            float diff = lhs - rhs;
            diff       = (diff < 0.0f) ? -diff : diff;
            lhs        = (diff < TOLERANCE_EQUAL) ? 1.0f : 0.0f;
        } break;

        case Binary_NE: {
            float diff = lhs - rhs;
            diff       = (diff < 0.0f) ? -diff : diff;
            lhs        = (diff >= TOLERANCE_EQUAL) ? 1.0f : 0.0f;
        } break;

        case Binary_LE:
            lhs = (lhs <= rhs) ? 1.0f : 0.0f;
            break;

        case Binary_GE:
            lhs = (lhs >= rhs) ? 1.0f : 0.0f;
            break;

        case Binary_GT:
            lhs = (lhs > rhs) ? 1.0f : 0.0f;
            break;

        default:
            return Error::ExpressionUnknownOp;
    }

    return Error::Ok;
}

/*! \brief Executes a binary operation.