org.spongepowered.mod.asm.util.ASMUtils.java Source code

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Here is the source code for org.spongepowered.mod.asm.util.ASMUtils.java

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/**
 * This file is part of Sponge, licensed under the MIT License (MIT).
 *
 * Copyright (c) SpongePowered.org <http://www.spongepowered.org>
 * Copyright (c) contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.spongepowered.mod.asm.util;

import org.objectweb.asm.Opcodes;
import org.objectweb.asm.tree.AbstractInsnNode;
import org.objectweb.asm.tree.InsnNode;
import org.objectweb.asm.tree.IntInsnNode;
import org.objectweb.asm.tree.LdcInsnNode;

public class ASMUtils {

    private ASMUtils() {
    }

    private final static int[] intConstants = new int[] { Opcodes.ICONST_0, Opcodes.ICONST_1, Opcodes.ICONST_2,
            Opcodes.ICONST_3, Opcodes.ICONST_4, Opcodes.ICONST_5 };

    public static AbstractInsnNode getPushIntConstant(int c) {
        if (c == -1) {
            return new InsnNode(Opcodes.ICONST_M1);
        } else if (c >= 0 && c <= 5) {
            return new InsnNode(intConstants[c]);
        } else if (c >= Byte.MIN_VALUE && c <= Byte.MAX_VALUE) {
            return new IntInsnNode(Opcodes.BIPUSH, c);
        } else if (c >= Short.MIN_VALUE && c <= Short.MAX_VALUE) {
            return new IntInsnNode(Opcodes.SIPUSH, c);
        } else {
            return new LdcInsnNode(c);
        }
    }

}