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 * permitted provided that the following conditions are met:
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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
 * permission.
 *
 * 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.tests.interop;

import com.oracle.truffle.llvm.tests.interop.values.TestCallback;
import com.oracle.truffle.llvm.tests.interop.values.TestCallback.Function;
import java.lang.reflect.Array;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import org.graalvm.polyglot.Value;
import org.junit.BeforeClass;

public class ManagedMemAccessTestBase extends InteropTestBase {

    protected static Object testLibrary;

    protected enum TestType {
        I8(1, false) {
            @Override
            void serialize(ByteBuffer buffer, Object value) {
                buffer.put((byte) (long) value);
            }
        },
        I16(2, false) {
            @Override
            void serialize(ByteBuffer buffer, Object value) {
                buffer.putShort((short) (long) value);
            }
        },
        I32(4, false) {
            @Override
            void serialize(ByteBuffer buffer, Object value) {
                buffer.putInt((int) (long) value);
            }
        },
        I64(8, false) {
            @Override
            void serialize(ByteBuffer buffer, Object value) {
                buffer.putLong((long) value);
            }
        },
        FLOAT(4, true) {
            @Override
            void serialize(ByteBuffer buffer, Object value) {
                buffer.putFloat((float) (double) value);
            }
        },
        DOUBLE(8, true) {
            @Override
            void serialize(ByteBuffer buffer, Object value) {
                buffer.putDouble((double) value);
            }
        };

        final int elementSize;
        final boolean isFloating;

        TestType(int elementSize, boolean isFloating) {
            this.elementSize = elementSize;
            this.isFloating = isFloating;
        }

        abstract void serialize(ByteBuffer buffer, Object value);
    }

    protected static Object[] types;

    protected static Object getTypeID(TestType type) {
        return types[type.ordinal()];
    }

    @BeforeClass
    public static void loadTestBitcode() {
        testLibrary = loadTestBitcodeInternal("managedMemmove.c");

        Value lib = runWithPolyglot.getPolyglotContext().asValue(testLibrary);
        Value getTypes = lib.getMember("get_types");

        types = new Object[TestType.values().length];
        getTypes.execute(new TestCallback(1, new Function() {

            int idx = 0;

            @Override
            public Object call(Object... args) {
                types[idx++] = args[0];
                return null;
            }
        }));
    }

    protected static byte[] serialize(TestType type, Object array) {
        int size = Array.getLength(array) * type.elementSize;
        ByteBuffer buffer = ByteBuffer.allocate(size).order(ByteOrder.nativeOrder());
        for (int i = 0; i < Array.getLength(array); i++) {
            type.serialize(buffer, Array.get(array, i));
        }
        return buffer.array();
    }
}