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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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package com.oracle.truffle.js.nodes.binary;

import com.oracle.truffle.api.CompilerAsserts;
import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.instrumentation.Tag;
import com.oracle.truffle.js.nodes.JavaScriptNode;
import com.oracle.truffle.js.nodes.Truncatable;
import com.oracle.truffle.js.nodes.instrumentation.JSTags;
import com.oracle.truffle.js.nodes.instrumentation.JSTags.UnaryOperationTag;
import com.oracle.truffle.js.nodes.unary.JSUnaryNode;
import com.oracle.truffle.js.runtime.BigInt;
import com.oracle.truffle.js.runtime.JSRuntime;

import java.util.Set;

public abstract class JSAddSubNumericUnitNode extends JSUnaryNode implements Truncatable {

    private final boolean isAddition;
    @CompilationFinal boolean truncate;

    protected JSAddSubNumericUnitNode(JavaScriptNode operand, boolean isAddition, boolean truncate) {
        super(operand);
        this.isAddition = isAddition;
        this.truncate = truncate;
    }

    @Override
    public boolean hasTag(Class<? extends Tag> tag) {
        if (tag == UnaryOperationTag.class) {
            return true;
        } else {
            return super.hasTag(tag);
        }
    }

    @Override
    public Object getNodeObject() {
        return JSTags.createNodeObjectDescriptor("operator", isAddition ? "++" : "--");
    }

    @Specialization(rewriteOn = ArithmeticException.class)
    protected int doInt(int a) {
        if (truncate) {
            return isAddition ? a + 1 : a - 1;
        } else {
            return isAddition ? Math.addExact(a, 1) : Math.subtractExact(a, 1);
        }
    }

    @Specialization(replaces = "doInt")
    protected double doDouble(double a) {
        return isAddition ? a + 1 : a - 1;
    }

    @Specialization
    protected BigInt doBigInt(BigInt a) {
        return isAddition ? a.add(BigInt.ONE) : a.subtract(BigInt.ONE);
    }

    // long etc could come via Interop
    @Specialization(guards = "isJavaNumber(a)")
    protected double doJavaNumber(Object a) {
        double doubleValue = JSRuntime.toDouble(a);
        return isAddition ? doubleValue + 1 : doubleValue - 1;
    }

    @Override
    public void setTruncate() {
        CompilerAsserts.neverPartOfCompilation();
        if (truncate == false) {
            truncate = true;
        }
    }

    public static JSAddSubNumericUnitNode create(JavaScriptNode operand, boolean isAddition, boolean truncate) {
        return JSAddSubNumericUnitNodeGen.create(operand, isAddition, truncate);
    }

    @Override
    protected JavaScriptNode copyUninitialized(Set<Class<? extends Tag>> materializedTags) {
        return create(cloneUninitialized(getOperand(), materializedTags), isAddition, truncate);
    }
}