net.sandius.rembulan.compiler.gen.asm.helpers.ConversionMethods Maven / Gradle / Ivy

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/*
 * Copyright 2016 Miroslav Janíček
 *
 * 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 static org.objectweb.asm.Opcodes.INVOKESTATIC;

public abstract class ConversionMethods {

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

	public static InsnList toNumericalValue(String what) {
		Check.notNull(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);
	}

}