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 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided
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 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to
 * endorse or promote products derived from this software without specific prior written
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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package com.oracle.truffle.llvm.runtime.interop;

import com.oracle.truffle.api.CompilerDirectives.ValueType;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.interop.UnsupportedMessageException;
import com.oracle.truffle.api.library.CachedLibrary;
import com.oracle.truffle.api.library.ExportLibrary;
import com.oracle.truffle.api.library.ExportMessage;

@ValueType
@ExportLibrary(InteropLibrary.class)
public final class LLVMNegatedForeignObject extends LLVMInternalTruffleObject {

    final Object foreign;

    public static Object negate(Object obj) {
        if (obj instanceof LLVMNegatedForeignObject) {
            return ((LLVMNegatedForeignObject) obj).getForeign();
        } else {
            return new LLVMNegatedForeignObject(obj);
        }
    }

    private LLVMNegatedForeignObject(Object foreign) {
        this.foreign = foreign;
    }

    public Object getForeign() {
        return foreign;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof LLVMNegatedForeignObject) {
            LLVMNegatedForeignObject other = (LLVMNegatedForeignObject) obj;
            return foreign.equals(other.foreign);
        }
        return false;
    }

    @Override
    public int hashCode() {
        return -foreign.hashCode();
    }

    @ExportMessage
    boolean isNull(@CachedLibrary("this.foreign") InteropLibrary interop) {
        return interop.isNull(getForeign());
    }

    @ExportMessage
    boolean isPointer(@CachedLibrary("this.foreign") InteropLibrary interop) {
        return interop.isPointer(getForeign());
    }

    @ExportMessage
    long asPointer(@CachedLibrary("this.foreign") InteropLibrary interop) throws UnsupportedMessageException {
        return -interop.asPointer(getForeign());
    }

    @ExportMessage
    void toNative(@CachedLibrary("this.foreign") InteropLibrary interop) {
        interop.toNative(getForeign());
    }

}