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The Qbicc builder for the java.base JDK module
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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * 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"
 * 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 jdk.internal.org.objectweb.asm;

/**
 * Information about a class being parsed in a {@link ClassReader}.
 *
 * @author Eric Bruneton
 */
final class Context {

    /** The prototypes of the attributes that must be parsed in this class. */
    Attribute[] attributePrototypes;

    /**
      * The options used to parse this class. One or more of {@link ClassReader#SKIP_CODE}, {@link
      * ClassReader#SKIP_DEBUG}, {@link ClassReader#SKIP_FRAMES}, {@link ClassReader#EXPAND_FRAMES} or
      * {@link ClassReader#EXPAND_ASM_INSNS}.
      */
    int parsingOptions;

    /** The buffer used to read strings in the constant pool. */
    char[] charBuffer;

    // Information about the current method, i.e. the one read in the current (or latest) call
    // to {@link ClassReader#readMethod()}.

    /** The access flags of the current method. */
    int currentMethodAccessFlags;

    /** The name of the current method. */
    String currentMethodName;

    /** The descriptor of the current method. */
    String currentMethodDescriptor;

    /**
      * The labels of the current method, indexed by bytecode offset (only bytecode offsets for which a
      * label is needed have a non null associated Label).
      */
    Label[] currentMethodLabels;

    // Information about the current type annotation target, i.e. the one read in the current
    // (or latest) call to {@link ClassReader#readAnnotationTarget()}.

    /**
      * The target_type and target_info of the current type annotation target, encoded as described in
      * {@link TypeReference}.
      */
    int currentTypeAnnotationTarget;

    /** The target_path of the current type annotation target. */
    TypePath currentTypeAnnotationTargetPath;

    /** The start of each local variable range in the current local variable annotation. */
    Label[] currentLocalVariableAnnotationRangeStarts;

    /** The end of each local variable range in the current local variable annotation. */
    Label[] currentLocalVariableAnnotationRangeEnds;

    /**
      * The local variable index of each local variable range in the current local variable annotation.
      */
    int[] currentLocalVariableAnnotationRangeIndices;

    // Information about the current stack map frame, i.e. the one read in the current (or latest)
    // call to {@link ClassReader#readFrame()}.

    /** The bytecode offset of the current stack map frame. */
    int currentFrameOffset;

    /**
      * The type of the current stack map frame. One of {@link Opcodes#F_FULL}, {@link
      * Opcodes#F_APPEND}, {@link Opcodes#F_CHOP}, {@link Opcodes#F_SAME} or {@link Opcodes#F_SAME1}.
      */
    int currentFrameType;

    /**
      * The number of local variable types in the current stack map frame. Each type is represented
      * with a single array element (even long and double).
      */
    int currentFrameLocalCount;

    /**
      * The delta number of local variable types in the current stack map frame (each type is
      * represented with a single array element - even long and double). This is the number of local
      * variable types in this frame, minus the number of local variable types in the previous frame.
      */
    int currentFrameLocalCountDelta;

    /**
      * The types of the local variables in the current stack map frame. Each type is represented with
      * a single array element (even long and double), using the format described in {@link
      * MethodVisitor#visitFrame}. Depending on {@link #currentFrameType}, this contains the types of
      * all the local variables, or only those of the additional ones (compared to the previous frame).
      */
    Object[] currentFrameLocalTypes;

    /**
      * The number stack element types in the current stack map frame. Each type is represented with a
      * single array element (even long and double).
      */
    int currentFrameStackCount;

    /**
      * The types of the stack elements in the current stack map frame. Each type is represented with a
      * single array element (even long and double), using the format described in {@link
      * MethodVisitor#visitFrame}.
      */
    Object[] currentFrameStackTypes;
}