1.1 --- a/javap/src/main/java/org/apidesign/javap/StackMapTableData.java Tue Feb 26 14:55:55 2013 +0100
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,223 +0,0 @@
1.4 -/*
1.5 - * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
1.6 - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 - *
1.8 - * This code is free software; you can redistribute it and/or modify it
1.9 - * under the terms of the GNU General Public License version 2 only, as
1.10 - * published by the Free Software Foundation. Oracle designates this
1.11 - * particular file as subject to the "Classpath" exception as provided
1.12 - * by Oracle in the LICENSE file that accompanied this code.
1.13 - *
1.14 - * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 - * version 2 for more details (a copy is included in the LICENSE file that
1.18 - * accompanied this code).
1.19 - *
1.20 - * You should have received a copy of the GNU General Public License version
1.21 - * 2 along with this work; if not, write to the Free Software Foundation,
1.22 - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 - *
1.24 - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 - * or visit www.oracle.com if you need additional information or have any
1.26 - * questions.
1.27 - */
1.28 -
1.29 -
1.30 -package org.apidesign.javap;
1.31 -
1.32 -import java.io.*;
1.33 -
1.34 -import static org.apidesign.javap.RuntimeConstants.*;
1.35 -
1.36 -/* represents one entry of StackMapTable attribute
1.37 - */
1.38 -abstract class StackMapTableData {
1.39 - final int frameType;
1.40 - int offsetDelta;
1.41 -
1.42 - StackMapTableData(int frameType) {
1.43 - this.frameType = frameType;
1.44 - }
1.45 -
1.46 - abstract void applyTo(TypeArray localTypes, TypeArray stackTypes);
1.47 -
1.48 - protected static String toString(
1.49 - final String frameType,
1.50 - final int offset,
1.51 - final int[] localTypes,
1.52 - final int[] stackTypes) {
1.53 - final StringBuilder sb = new StringBuilder(frameType);
1.54 -
1.55 - sb.append("(off: +").append(offset);
1.56 - if (localTypes != null) {
1.57 - sb.append(", locals: ");
1.58 - appendTypes(sb, localTypes);
1.59 - }
1.60 - if (stackTypes != null) {
1.61 - sb.append(", stack: ");
1.62 - appendTypes(sb, stackTypes);
1.63 - }
1.64 - sb.append(')');
1.65 -
1.66 - return sb.toString();
1.67 - }
1.68 -
1.69 - private static void appendTypes(final StringBuilder sb, final int[] types) {
1.70 - sb.append('[');
1.71 - if (types.length > 0) {
1.72 - sb.append(TypeArray.typeString(types[0]));
1.73 - for (int i = 1; i < types.length; ++i) {
1.74 - sb.append(", ");
1.75 - sb.append(TypeArray.typeString(types[i]));
1.76 - }
1.77 - }
1.78 - sb.append(']');
1.79 - }
1.80 -
1.81 - static class SameFrame extends StackMapTableData {
1.82 - SameFrame(int frameType, int offsetDelta) {
1.83 - super(frameType);
1.84 - this.offsetDelta = offsetDelta;
1.85 - }
1.86 -
1.87 - @Override
1.88 - void applyTo(TypeArray localTypes, TypeArray stackTypes) {
1.89 - stackTypes.clear();
1.90 - }
1.91 -
1.92 - @Override
1.93 - public String toString() {
1.94 - return toString("SAME" + ((frameType == SAME_FRAME_EXTENDED)
1.95 - ? "_FRAME_EXTENDED" : ""),
1.96 - offsetDelta,
1.97 - null, null);
1.98 - }
1.99 - }
1.100 -
1.101 - static class SameLocals1StackItem extends StackMapTableData {
1.102 - final int[] stack;
1.103 - SameLocals1StackItem(int frameType, int offsetDelta, int[] stack) {
1.104 - super(frameType);
1.105 - this.offsetDelta = offsetDelta;
1.106 - this.stack = stack;
1.107 - }
1.108 -
1.109 - @Override
1.110 - void applyTo(TypeArray localTypes, TypeArray stackTypes) {
1.111 - stackTypes.setAll(stack);
1.112 - }
1.113 -
1.114 - @Override
1.115 - public String toString() {
1.116 - return toString(
1.117 - "SAME_LOCALS_1_STACK_ITEM"
1.118 - + ((frameType == SAME_LOCALS_1_STACK_ITEM_EXTENDED)
1.119 - ? "_EXTENDED" : ""),
1.120 - offsetDelta,
1.121 - null, stack);
1.122 - }
1.123 - }
1.124 -
1.125 - static class ChopFrame extends StackMapTableData {
1.126 - ChopFrame(int frameType, int offsetDelta) {
1.127 - super(frameType);
1.128 - this.offsetDelta = offsetDelta;
1.129 - }
1.130 -
1.131 - @Override
1.132 - void applyTo(TypeArray localTypes, TypeArray stackTypes) {
1.133 - localTypes.setSize(localTypes.getSize()
1.134 - - (SAME_FRAME_EXTENDED - frameType));
1.135 - stackTypes.clear();
1.136 - }
1.137 -
1.138 - @Override
1.139 - public String toString() {
1.140 - return toString("CHOP", offsetDelta, null, null);
1.141 - }
1.142 - }
1.143 -
1.144 - static class AppendFrame extends StackMapTableData {
1.145 - final int[] locals;
1.146 - AppendFrame(int frameType, int offsetDelta, int[] locals) {
1.147 - super(frameType);
1.148 - this.offsetDelta = offsetDelta;
1.149 - this.locals = locals;
1.150 - }
1.151 -
1.152 - @Override
1.153 - void applyTo(TypeArray localTypes, TypeArray stackTypes) {
1.154 - localTypes.addAll(locals);
1.155 - stackTypes.clear();
1.156 - }
1.157 -
1.158 - @Override
1.159 - public String toString() {
1.160 - return toString("APPEND", offsetDelta, locals, null);
1.161 - }
1.162 - }
1.163 -
1.164 - static class FullFrame extends StackMapTableData {
1.165 - final int[] locals;
1.166 - final int[] stack;
1.167 - FullFrame(int offsetDelta, int[] locals, int[] stack) {
1.168 - super(FULL_FRAME);
1.169 - this.offsetDelta = offsetDelta;
1.170 - this.locals = locals;
1.171 - this.stack = stack;
1.172 - }
1.173 -
1.174 - @Override
1.175 - void applyTo(TypeArray localTypes, TypeArray stackTypes) {
1.176 - localTypes.setAll(locals);
1.177 - stackTypes.setAll(stack);
1.178 - }
1.179 -
1.180 - @Override
1.181 - public String toString() {
1.182 - return toString("FULL", offsetDelta, locals, stack);
1.183 - }
1.184 - }
1.185 -
1.186 - static StackMapTableData getInstance(DataInputStream in, MethodData method)
1.187 - throws IOException {
1.188 - int frameType = in.readUnsignedByte();
1.189 -
1.190 - if (frameType < SAME_FRAME_BOUND) {
1.191 - // same_frame
1.192 - return new SameFrame(frameType, frameType);
1.193 - } else if (SAME_FRAME_BOUND <= frameType && frameType < SAME_LOCALS_1_STACK_ITEM_BOUND) {
1.194 - // same_locals_1_stack_item_frame
1.195 - // read additional single stack element
1.196 - return new SameLocals1StackItem(frameType,
1.197 - (frameType - SAME_FRAME_BOUND),
1.198 - StackMapData.readTypeArray(in, 1, method));
1.199 - } else if (frameType == SAME_LOCALS_1_STACK_ITEM_EXTENDED) {
1.200 - // same_locals_1_stack_item_extended
1.201 - return new SameLocals1StackItem(frameType,
1.202 - in.readUnsignedShort(),
1.203 - StackMapData.readTypeArray(in, 1, method));
1.204 - } else if (SAME_LOCALS_1_STACK_ITEM_EXTENDED < frameType && frameType < SAME_FRAME_EXTENDED) {
1.205 - // chop_frame or same_frame_extended
1.206 - return new ChopFrame(frameType, in.readUnsignedShort());
1.207 - } else if (frameType == SAME_FRAME_EXTENDED) {
1.208 - // chop_frame or same_frame_extended
1.209 - return new SameFrame(frameType, in.readUnsignedShort());
1.210 - } else if (SAME_FRAME_EXTENDED < frameType && frameType < FULL_FRAME) {
1.211 - // append_frame
1.212 - return new AppendFrame(frameType, in.readUnsignedShort(),
1.213 - StackMapData.readTypeArray(in, frameType - SAME_FRAME_EXTENDED, method));
1.214 - } else if (frameType == FULL_FRAME) {
1.215 - // full_frame
1.216 - int offsetDelta = in.readUnsignedShort();
1.217 - int locals_size = in.readUnsignedShort();
1.218 - int[] locals = StackMapData.readTypeArray(in, locals_size, method);
1.219 - int stack_size = in.readUnsignedShort();
1.220 - int[] stack = StackMapData.readTypeArray(in, stack_size, method);
1.221 - return new FullFrame(offsetDelta, locals, stack);
1.222 - } else {
1.223 - throw new ClassFormatError("unrecognized frame_type in StackMapTable");
1.224 - }
1.225 - }
1.226 -}