net.sandius.rembulan.compiler.gen.asm.helpers.ConversionMethods.java Source code

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Here is the source code for net.sandius.rembulan.compiler.gen.asm.helpers.ConversionMethods.java

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/*
 * Copyright 2016 Miroslav Jan?ek
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.sandius.rembulan.compiler.gen.asm.helpers;

import net.sandius.rembulan.Conversions;
import net.sandius.rembulan.LuaFormat;
import net.sandius.rembulan.util.Check;
import org.objectweb.asm.Type;
import org.objectweb.asm.tree.AbstractInsnNode;
import org.objectweb.asm.tree.InsnList;
import org.objectweb.asm.tree.LdcInsnNode;
import org.objectweb.asm.tree.MethodInsnNode;

import java.util.Objects;

import static org.objectweb.asm.Opcodes.INVOKESTATIC;

public abstract class ConversionMethods {

    private ConversionMethods() {
        // not to be instantiated or extended
    }

    public static InsnList toNumericalValue(String what) {
        Objects.requireNonNull(what);
        InsnList il = new InsnList();

        il.add(new LdcInsnNode(what));
        il.add(new MethodInsnNode(INVOKESTATIC, Type.getInternalName(Conversions.class), "toNumericalValue",
                Type.getMethodDescriptor(Type.getType(Number.class), Type.getType(Object.class),
                        Type.getType(String.class)),
                false));

        return il;
    }

    public static AbstractInsnNode floatValueOf() {
        return new MethodInsnNode(INVOKESTATIC, Type.getInternalName(Conversions.class), "floatValueOf",
                Type.getMethodDescriptor(Type.getType(Double.class), Type.getType(Object.class)), false);
    }

    public static AbstractInsnNode booleanValueOf() {
        return new MethodInsnNode(INVOKESTATIC, Type.getInternalName(Conversions.class), "booleanValueOf",
                Type.getMethodDescriptor(Type.BOOLEAN_TYPE, Type.getType(Object.class)), false);
    }

    public static AbstractInsnNode unboxedNumberToLuaFormatString(Type tpe) {
        Check.isTrue(tpe.equals(Type.DOUBLE_TYPE) || tpe.equals(Type.LONG_TYPE));
        return new MethodInsnNode(INVOKESTATIC, Type.getInternalName(LuaFormat.class), "toString",
                Type.getMethodDescriptor(Type.getType(String.class), tpe), false);
    }

    public static AbstractInsnNode boxedNumberToLuaFormatString() {
        return new MethodInsnNode(INVOKESTATIC, Type.getInternalName(Conversions.class), "stringValueOf",
                Type.getMethodDescriptor(Type.getType(String.class), Type.getType(Number.class)), false);
    }

}