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 * The Universal Permissive License (UPL), Version 1.0
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 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
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 * without restriction, including without limitation the rights to copy, create
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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
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 * This license is subject to the following condition:
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 * The above copyright notice and either this complete permission notice or at a
 * minimum a reference to the UPL must be included in all copies or substantial
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package com.oracle.graal.python.builtins.objects.cext.hpy;

import com.oracle.graal.python.builtins.objects.PythonAbstractObject;
import com.oracle.graal.python.runtime.GilNode;
import com.oracle.graal.python.runtime.GilNode.UncachedAcquire;
import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.interop.ArityException;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.interop.TruffleObject;
import com.oracle.truffle.api.interop.UnsupportedMessageException;
import com.oracle.truffle.api.library.ExportLibrary;
import com.oracle.truffle.api.library.ExportMessage;

/**
 * A simple interop-capable object that is used to initialize the HPy C API.
 */
@ExportLibrary(InteropLibrary.class)
public final class GraalHPyInitObject implements TruffleObject {

    public static final String SET_HPY_CONTEXT_NATIVE_TYPE = "setHPyContextNativeType";
    public static final String SET_HPY_NATIVE_TYPE = "setHPyNativeType";
    public static final String SET_HPY_ARRAY_NATIVE_TYPE = "setHPyArrayNativeType";
    public static final String SET_WCHAR_SIZE = "setWcharSize";
    private final GraalHPyContext hpyContext;

    public GraalHPyInitObject(GraalHPyContext hpyContext) {
        this.hpyContext = hpyContext;
    }

    @ExportMessage
    @SuppressWarnings("static-method")
    boolean hasMembers() {
        return true;
    }

    @ExportMessage
    @SuppressWarnings("static-method")
    Object getMembers(@SuppressWarnings("unused") boolean includeInternal) {
        return new PythonAbstractObject.Keys(new String[]{SET_HPY_CONTEXT_NATIVE_TYPE, SET_HPY_NATIVE_TYPE, SET_HPY_ARRAY_NATIVE_TYPE, SET_WCHAR_SIZE});
    }

    @ExportMessage
    @SuppressWarnings("static-method")
    boolean isMemberInvocable(String key) {
        switch (key) {
            case SET_HPY_CONTEXT_NATIVE_TYPE:
            case SET_HPY_NATIVE_TYPE:
            case SET_HPY_ARRAY_NATIVE_TYPE:
            case SET_WCHAR_SIZE:
                return true;
        }
        return false;
    }

    @ExportMessage
    @TruffleBoundary
    @SuppressWarnings({"try", "unused"})
    Object invokeMember(String key, Object[] arguments) throws UnsupportedMessageException, ArityException {
        try (UncachedAcquire gil = GilNode.uncachedAcquire()) {
            if (arguments.length != 1) {
                throw ArityException.create(1, 1, arguments.length);
            }

            switch (key) {
                case SET_HPY_CONTEXT_NATIVE_TYPE:
                    hpyContext.setHPyContextNativeType(arguments[0]);
                    return 0;
                case SET_HPY_NATIVE_TYPE:
                    hpyContext.setHPyNativeType(arguments[0]);
                    return 0;
                case SET_HPY_ARRAY_NATIVE_TYPE:
                    hpyContext.setHPyArrayNativeType(arguments[0]);
                    return 0;
                case SET_WCHAR_SIZE:
                    hpyContext.setWcharSize(((Number) arguments[0]).longValue());
                    return 0;
            }
            throw UnsupportedMessageException.create();
        }
    }
}
