author | jjg |
Tue, 20 Jan 2009 18:23:13 -0800 | |
changeset 1870 | 57a1138dffc8 |
parent 735 | 372aa565a221 |
child 2212 | 1d3dc0e0ba0c |
permissions | -rw-r--r-- |
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/* |
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* Copyright 2007-2008 Sun Microsystems, Inc. All Rights Reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Sun designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Sun in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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*/ |
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package com.sun.tools.classfile; |
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import java.io.IOException; |
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/** |
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* See JVMS3, section 4.8.3. |
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* |
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* <p><b>This is NOT part of any API supported by Sun Microsystems. If |
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* you write code that depends on this, you do so at your own risk. |
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* This code and its internal interfaces are subject to change or |
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* deletion without notice.</b> |
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*/ |
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public class Code_attribute extends Attribute { |
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public class InvalidIndex extends AttributeException { |
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private static final long serialVersionUID = -8904527774589382802L; |
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InvalidIndex(int index) { |
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this.index = index; |
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} |
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@Override |
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public String getMessage() { |
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// i18n |
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return "invalid index " + index + " in Code attribute"; |
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} |
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public final int index; |
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} |
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Code_attribute(ClassReader cr, int name_index, int length) |
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throws IOException, ConstantPoolException { |
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super(name_index, length); |
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max_stack = cr.readUnsignedShort(); |
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max_locals = cr.readUnsignedShort(); |
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code_length = cr.readInt(); |
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code = new byte[code_length]; |
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cr.readFully(code); |
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exception_table_langth = cr.readUnsignedShort(); |
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exception_table = new Exception_data[exception_table_langth]; |
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for (int i = 0; i < exception_table_langth; i++) |
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exception_table[i] = new Exception_data(cr); |
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attributes = new Attributes(cr); |
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} |
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public int getByte(int offset) throws InvalidIndex { |
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if (offset < 0 || offset >= code.length) |
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throw new InvalidIndex(offset); |
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return code[offset]; |
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} |
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public int getUnsignedByte(int offset) throws InvalidIndex { |
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if (offset < 0 || offset >= code.length) |
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throw new InvalidIndex(offset); |
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return code[offset] & 0xff; |
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} |
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public int getShort(int offset) throws InvalidIndex { |
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if (offset < 0 || offset + 1 >= code.length) |
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throw new InvalidIndex(offset); |
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return (code[offset] << 8) | (code[offset + 1] & 0xFF); |
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} |
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public int getUnsignedShort(int offset) throws InvalidIndex { |
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if (offset < 0 || offset + 1 >= code.length) |
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throw new InvalidIndex(offset); |
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return ((code[offset] << 8) | (code[offset + 1] & 0xFF)) & 0xFFFF; |
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} |
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public int getInt(int offset) throws InvalidIndex { |
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if (offset < 0 || offset + 3 >= code.length) |
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throw new InvalidIndex(offset); |
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return (getShort(offset) << 16) | (getShort(offset + 2) & 0xFFFF); |
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} |
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public <R, D> R accept(Visitor<R, D> visitor, D data) { |
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return visitor.visitCode(this, data); |
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} |
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public final int max_stack; |
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public final int max_locals; |
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public final int code_length; |
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public final byte[] code; |
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public final int exception_table_langth; |
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public final Exception_data[] exception_table; |
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public final Attributes attributes; |
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public class Exception_data { |
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Exception_data(ClassReader cr) throws IOException { |
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start_pc = cr.readUnsignedShort(); |
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end_pc = cr.readUnsignedShort(); |
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handler_pc = cr.readUnsignedShort(); |
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catch_type = cr.readUnsignedShort(); |
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} |
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public final int start_pc; |
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public final int end_pc; |
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public final int handler_pc; |
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public final int catch_type; |
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} |
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} |