1.1 --- a/javap/src/main/java/org/apidesign/javap/StackMapIterator.java Tue Feb 26 14:55:55 2013 +0100
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,179 +0,0 @@
1.4 -/*
1.5 - * Copyright (c) 2012, 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 -package org.apidesign.javap;
1.30 -
1.31 -import static org.apidesign.javap.RuntimeConstants.ITEM_Integer;
1.32 -import static org.apidesign.javap.RuntimeConstants.ITEM_Float;
1.33 -import static org.apidesign.javap.RuntimeConstants.ITEM_Double;
1.34 -import static org.apidesign.javap.RuntimeConstants.ITEM_Long;
1.35 -import static org.apidesign.javap.RuntimeConstants.ITEM_Object;
1.36 -
1.37 -public final class StackMapIterator {
1.38 - private final StackMapTableData[] stackMapTable;
1.39 - private final TypeArray argTypes;
1.40 - private final TypeArray localTypes;
1.41 - private final TypeArray stackTypes;
1.42 -
1.43 - private int nextFrameIndex;
1.44 - private int lastFrameByteCodeOffset;
1.45 -
1.46 - private int byteCodeOffset;
1.47 -
1.48 - StackMapIterator(final MethodData methodData) {
1.49 - this(methodData.getStackMapTable(),
1.50 - methodData.getInternalSig(),
1.51 - methodData.isStatic());
1.52 - }
1.53 -
1.54 - StackMapIterator(final StackMapTableData[] stackMapTable,
1.55 - final String methodSignature,
1.56 - final boolean isStaticMethod) {
1.57 - this.stackMapTable = (stackMapTable != null)
1.58 - ? stackMapTable
1.59 - : new StackMapTableData[0];
1.60 -
1.61 - argTypes = getArgTypes(methodSignature, isStaticMethod);
1.62 - localTypes = new TypeArray();
1.63 - stackTypes = new TypeArray();
1.64 -
1.65 - localTypes.addAll(argTypes);
1.66 -
1.67 - lastFrameByteCodeOffset = -1;
1.68 - advanceBy(0);
1.69 - }
1.70 -
1.71 - public String getFrameAsString() {
1.72 - return (nextFrameIndex == 0)
1.73 - ? StackMapTableData.toString("INITIAL", 0, null, null)
1.74 - : stackMapTable[nextFrameIndex - 1].toString();
1.75 - }
1.76 -
1.77 - public int getFrameIndex() {
1.78 - return nextFrameIndex;
1.79 - }
1.80 -
1.81 - public TypeArray getFrameStack() {
1.82 - return stackTypes;
1.83 - }
1.84 -
1.85 - public TypeArray getFrameLocals() {
1.86 - return localTypes;
1.87 - }
1.88 -
1.89 - public TypeArray getArguments() {
1.90 - return argTypes;
1.91 - }
1.92 -
1.93 - public void advanceBy(final int numByteCodes) {
1.94 - if (numByteCodes < 0) {
1.95 - throw new IllegalStateException("Forward only iterator");
1.96 - }
1.97 -
1.98 - byteCodeOffset += numByteCodes;
1.99 - while ((nextFrameIndex < stackMapTable.length)
1.100 - && ((byteCodeOffset - lastFrameByteCodeOffset)
1.101 - >= (stackMapTable[nextFrameIndex].offsetDelta
1.102 - + 1))) {
1.103 - final StackMapTableData nextFrame = stackMapTable[nextFrameIndex];
1.104 -
1.105 - lastFrameByteCodeOffset += nextFrame.offsetDelta + 1;
1.106 - nextFrame.applyTo(localTypes, stackTypes);
1.107 -
1.108 - ++nextFrameIndex;
1.109 - }
1.110 - }
1.111 -
1.112 - public void advanceTo(final int nextByteCodeOffset) {
1.113 - advanceBy(nextByteCodeOffset - byteCodeOffset);
1.114 - }
1.115 -
1.116 - private static TypeArray getArgTypes(final String methodSignature,
1.117 - final boolean isStaticMethod) {
1.118 - final TypeArray argTypes = new TypeArray();
1.119 -
1.120 - if (!isStaticMethod) {
1.121 - argTypes.add(ITEM_Object);
1.122 - }
1.123 -
1.124 - if (methodSignature.charAt(0) != '(') {
1.125 - throw new IllegalArgumentException("Invalid method signature");
1.126 - }
1.127 -
1.128 - final int length = methodSignature.length();
1.129 - boolean skipType = false;
1.130 - int argType;
1.131 - for (int i = 1; i < length; ++i) {
1.132 - switch (methodSignature.charAt(i)) {
1.133 - case 'B':
1.134 - case 'C':
1.135 - case 'S':
1.136 - case 'Z':
1.137 - case 'I':
1.138 - argType = ITEM_Integer;
1.139 - break;
1.140 - case 'J':
1.141 - argType = ITEM_Long;
1.142 - break;
1.143 - case 'F':
1.144 - argType = ITEM_Float;
1.145 - break;
1.146 - case 'D':
1.147 - argType = ITEM_Double;
1.148 - break;
1.149 - case 'L': {
1.150 - i = methodSignature.indexOf(';', i + 1);
1.151 - if (i == -1) {
1.152 - throw new IllegalArgumentException(
1.153 - "Invalid method signature");
1.154 - }
1.155 - argType = ITEM_Object;
1.156 - break;
1.157 - }
1.158 - case ')':
1.159 - // not interested in the return value type
1.160 - return argTypes;
1.161 - case '[':
1.162 - if (!skipType) {
1.163 - argTypes.add(ITEM_Object);
1.164 - skipType = true;
1.165 - }
1.166 - continue;
1.167 -
1.168 - default:
1.169 - throw new IllegalArgumentException(
1.170 - "Invalid method signature");
1.171 - }
1.172 -
1.173 - if (!skipType) {
1.174 - argTypes.add(argType);
1.175 - } else {
1.176 - skipType = false;
1.177 - }
1.178 - }
1.179 -
1.180 - return argTypes;
1.181 - }
1.182 -}