1 files changed, 135 insertions, 0 deletions
diff --git a/src/proguard/classfile/instruction/LookUpSwitchInstruction.java b/src/proguard/classfile/instruction/LookUpSwitchInstruction.java
new file mode 100644
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+++ b/src/proguard/classfile/instruction/LookUpSwitchInstruction.java
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+/*
+ * ProGuard -- shrinking, optimization, obfuscation, and preverification
+ *             of Java bytecode.
+ *
+ * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program 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 for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+package proguard.classfile.instruction;
+
+import proguard.classfile.*;
+import proguard.classfile.attribute.CodeAttribute;
+import proguard.classfile.instruction.visitor.InstructionVisitor;
+
+/**
+ * This Instruction represents a simple instruction without variable arguments
+ * or constant pool references.
+ *
+ * @author Eric Lafortune
+ */
+public class LookUpSwitchInstruction extends SwitchInstruction
+{
+    public int[] cases;
+
+
+    /**
+     * Creates an uninitialized LookUpSwitchInstruction.
+     */
+    public LookUpSwitchInstruction() {}
+
+
+    /**
+     * Creates a new LookUpSwitchInstruction with the given arguments.
+     */
+    public LookUpSwitchInstruction(byte  opcode,
+                                   int   defaultOffset,
+                                   int[] cases,
+                                   int[] jumpOffsets)
+    {
+        this.opcode        = opcode;
+        this.defaultOffset = defaultOffset;
+        this.cases         = cases;
+        this.jumpOffsets   = jumpOffsets;
+    }
+
+
+    /**
+     * Copies the given instruction into this instruction.
+     * @param lookUpSwitchInstruction the instruction to be copied.
+     * @return this instruction.
+     */
+    public LookUpSwitchInstruction copy(LookUpSwitchInstruction lookUpSwitchInstruction)
+    {
+        this.opcode        = lookUpSwitchInstruction.opcode;
+        this.defaultOffset = lookUpSwitchInstruction.defaultOffset;
+        this.cases         = lookUpSwitchInstruction.cases;
+        this.jumpOffsets   = lookUpSwitchInstruction.jumpOffsets;
+
+        return this;
+    }
+
+
+    // Implementations for Instruction.
+
+    public Instruction shrink()
+    {
+        // There aren't any ways to shrink this instruction.
+        return this;
+    }
+
+    protected void readInfo(byte[] code, int offset)
+    {
+        // Skip up to three padding bytes.
+        offset += -offset & 3;
+
+        // Read the two 32-bit arguments.
+        defaultOffset       = readInt(code, offset); offset += 4;
+        int jumpOffsetCount = readInt(code, offset); offset += 4;
+
+        // Read the matches-offset pairs.
+        cases       = new int[jumpOffsetCount];
+        jumpOffsets = new int[jumpOffsetCount];
+
+        for (int index = 0; index < jumpOffsetCount; index++)
+        {
+            cases[index]       = readInt(code, offset); offset += 4;
+            jumpOffsets[index] = readInt(code, offset); offset += 4;
+        }
+    }
+
+
+    protected void writeInfo(byte[] code, int offset)
+    {
+        // Write up to three padding bytes.
+        while ((offset & 3) != 0)
+        {
+            writeByte(code, offset++, 0);
+        }
+
+        // Write the two 32-bit arguments.
+        writeInt(code, offset, defaultOffset); offset += 4;
+        writeInt(code, offset, cases.length);  offset += 4;
+
+        // Write the matches-offset pairs.
+        for (int index = 0; index < cases.length; index++)
+        {
+            writeInt(code, offset, cases[index]);       offset += 4;
+            writeInt(code, offset, jumpOffsets[index]); offset += 4;
+        }
+    }
+
+
+    public int length(int offset)
+    {
+        return 1 + (-(offset+1) & 3) + 8 + cases.length * 8;
+    }
+
+
+    public void accept(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, InstructionVisitor instructionVisitor)
+    {
+        instructionVisitor.visitLookUpSwitchInstruction(clazz, method, codeAttribute, offset, this);
+    }
+}