/***
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000-2005 INRIA, France Telecom
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 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 with the distribution.
 * 3. Neither the name of the copyright holders 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 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.objectweb.asm.tree;

import org.objectweb.asm.MethodVisitor;

/**
 * A node that represents a zero operand instruction.
 *
 * @author Eric Bruneton
 */
public class InsnNode extends AbstractInsnNode {

    private final static InsnNode[] INSNS;

    static {
        INSNS = new InsnNode[255];
        for (int i = 0; i < INSNS.length; ++i) {
            INSNS[i] = new InsnNode(i);
        }
    }

    /**
     * Returns the {@link InsnNode} corresponding to the given opcode.
     *
     * @deprecated uses the constructor instead.
     *
     * @param opcode an instruction opcode.
     * @return the {@link InsnNode} corresponding to the given opcode.
     */
    public final static InsnNode getByOpcode(final int opcode) {
        return INSNS[opcode];
    }

    /**
     * Constructs a new {@link InsnNode}.
     *
     * @param opcode the opcode of the instruction to be constructed. This
     *        opcode must be NOP, ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1,
     *        ICONST_2, ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1,
     *        FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, IALOAD, LALOAD,
     *        FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IASTORE, LASTORE,
     *        FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE, POP, POP2,
     *        DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP, IADD, LADD,
     *        FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV,
     *        LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG, FNEG, DNEG,
     *        ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR, LOR, IXOR,
     *        LXOR, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F,
     *        I2B, I2C, I2S, LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IRETURN, LRETURN,
     *        FRETURN, DRETURN, ARETURN, RETURN, ARRAYLENGTH, ATHROW,
     *        MONITORENTER, or MONITOREXIT.
     */
    public InsnNode(final int opcode) {
        super(opcode);
    }

    /**
     * Makes the given visitor visit this instruction.
     *
     * @param mv a method visitor.
     */
    public void accept(final MethodVisitor mv) {
        mv.visitInsn(opcode);
    }

    public int getType() {
        return INSN;
    }
}
