java/15 : java.base/jdk/internal/org/objectweb/asm/tree/analysis/SourceValue.java

SourceValue
https://openjdk.java.net/
GPLv2 + Classpath Exception
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/*
 * This file is available under and governed by the GNU General Public
 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file:
 *
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000-2011 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"
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package jdk.internal.org.objectweb.asm.tree.analysis;

import java.util.Set;
import jdk.internal.org.objectweb.asm.tree.AbstractInsnNode;

A Value which keeps track of the bytecode instructions that can produce it. 
Author: Eric Bruneton/**
 * A {@link Value} which keeps track of the bytecode instructions that can produce it.
 *
 * @author Eric Bruneton
 */
public class SourceValue implements Value {

    The size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int,
float, object and array types, and 2 for long and double.
/**
      * The size of this value, in 32 bits words. This size is 1 for byte, boolean, char, short, int,
      * float, object and array types, and 2 for long and double.
      */
    public final int size;

    The instructions that can produce this value. For example, for the Java code below, the instructions that can produce the value of i at line 5 are the two ISTORE instructions at line 1 and 3: 1: i = 0;
2: if (...) {
3:   i = 1;
4: }
5: return i;

/**
      * The instructions that can produce this value. For example, for the Java code below, the
      * instructions that can produce the value of {@code i} at line 5 are the two ISTORE instructions
      * at line 1 and 3:
      *
      * <pre>
      * 1: i = 0;
      * 2: if (...) {
      * 3:   i = 1;
      * 4: }
      * 5: return i;
      * </pre>
      */
    public final Set<AbstractInsnNode> insns;

    Constructs a new SourceValue. 
Params: size – the size of this value, in 32 bits words. This size is 1 for byte, boolean, char,
    short, int, float, object and array types, and 2 for long and double./**
      * Constructs a new {@link SourceValue}.
      *
      * @param size the size of this value, in 32 bits words. This size is 1 for byte, boolean, char,
      *     short, int, float, object and array types, and 2 for long and double.
      */
    public SourceValue(final int size) {
        this(size, new SmallSet<AbstractInsnNode>());
    }

    Constructs a new SourceValue. 
Params: size – the size of this value, in 32 bits words. This size is 1 for byte, boolean, char,
    short, int, float, object and array types, and 2 for long and double.
insnNode – an instruction that can produce this value./**
      * Constructs a new {@link SourceValue}.
      *
      * @param size the size of this value, in 32 bits words. This size is 1 for byte, boolean, char,
      *     short, int, float, object and array types, and 2 for long and double.
      * @param insnNode an instruction that can produce this value.
      */
    public SourceValue(final int size, final AbstractInsnNode insnNode) {
        this.size = size;
        this.insns = new SmallSet<>(insnNode);
    }

    Constructs a new SourceValue. 
Params: size – the size of this value, in 32 bits words. This size is 1 for byte, boolean, char,
    short, int, float, object and array types, and 2 for long and double.
insnSet – the instructions that can produce this value./**
      * Constructs a new {@link SourceValue}.
      *
      * @param size the size of this value, in 32 bits words. This size is 1 for byte, boolean, char,
      *     short, int, float, object and array types, and 2 for long and double.
      * @param insnSet the instructions that can produce this value.
      */
    public SourceValue(final int size, final Set<AbstractInsnNode> insnSet) {
        this.size = size;
        this.insns = insnSet;
    }

    Returns the size of this value.
Returns: the size of this value, in 32 bits words. This size is 1 for byte, boolean, char,
    short, int, float, object and array types, and 2 for long and double./**
      * Returns the size of this value.
      *
      * @return the size of this value, in 32 bits words. This size is 1 for byte, boolean, char,
      *     short, int, float, object and array types, and 2 for long and double.
      */
    @Override
    public int getSize() {
        return size;
    }

    @Override
    public boolean equals(final Object value) {
        if (!(value instanceof SourceValue)) {
            return false;
        }
        SourceValue sourceValue = (SourceValue) value;
        return size == sourceValue.size && insns.equals(sourceValue.insns);
    }

    @Override
    public int hashCode() {
        return insns.hashCode();
    }
}
/

java/ 15/ java.base/jdk/internal/org/objectweb/asm/tree/analysis/SourceValue.java
