1 files changed, 115 insertions, 0 deletions
diff --git a/dexlib/src/main/java/org/jf/dexlib/Code/Format/Instruction21c.java b/dexlib/src/main/java/org/jf/dexlib/Code/Format/Instruction21c.java
new file mode 100644
index 0000000..2c12a9b
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+++ b/dexlib/src/main/java/org/jf/dexlib/Code/Format/Instruction21c.java
@@ -0,0 +1,115 @@
+/*
+ * [The "BSD licence"]
+ * Copyright (c) 2010 Ben Gruver (JesusFreke)
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 org.jf.dexlib.Code.Format;
+
+import org.jf.dexlib.Code.Instruction;
+import org.jf.dexlib.Code.InstructionWithReference;
+import org.jf.dexlib.Code.Opcode;
+import org.jf.dexlib.Code.SingleRegisterInstruction;
+import org.jf.dexlib.DexFile;
+import org.jf.dexlib.Item;
+import org.jf.dexlib.TypeIdItem;
+import org.jf.dexlib.Util.AnnotatedOutput;
+
+public class Instruction21c extends InstructionWithReference implements SingleRegisterInstruction,
+        InstructionWithJumboVariant {
+    public static final Instruction.InstructionFactory Factory = new Factory();
+    private byte regA;
+
+    public Instruction21c(Opcode opcode, short regA, Item referencedItem) {
+        super(opcode, referencedItem);
+
+        if (regA >= 1 << 8) {
+            throw new RuntimeException("The register number must be less than v256");
+        }
+
+        if (opcode == Opcode.NEW_INSTANCE) {
+            assert referencedItem instanceof TypeIdItem;
+            if (((TypeIdItem)referencedItem).getTypeDescriptor().charAt(0) != 'L') {
+                throw new RuntimeException("Only class references can be used with the new-instance opcode");
+            }
+        }
+
+        this.regA = (byte)regA;
+    }
+
+    private Instruction21c(DexFile dexFile, Opcode opcode, byte[] buffer, int bufferIndex) {
+        super(dexFile, opcode, buffer, bufferIndex);
+
+        if (opcode == Opcode.NEW_INSTANCE &&
+                ((TypeIdItem)this.getReferencedItem()).getTypeDescriptor().charAt(0) != 'L') {
+            
+            throw new RuntimeException("Only class references can be used with the new-instance opcode");
+        }
+
+        this.regA = buffer[bufferIndex + 1];
+    }
+
+    protected void writeInstruction(AnnotatedOutput out, int currentCodeAddress) {
+        if(getReferencedItem().getIndex() > 0xFFFF) {
+            if (opcode.hasJumboOpcode()) {
+                throw new RuntimeException(String.format("%s index is too large. Use the %s instruction instead.",
+                        opcode.referenceType.name(), opcode.getJumboOpcode().name));
+            } else {
+                throw new RuntimeException(String.format("%s index is too large", opcode.referenceType.name()));
+            }
+        }
+
+        out.writeByte(opcode.value);
+        out.writeByte(regA);
+        out.writeShort(getReferencedItem().getIndex());
+    }
+
+    public Format getFormat() {
+        return Format.Format21c;
+    }
+
+    public int getRegisterA() {
+        return regA & 0xFF;
+    }
+
+    public Instruction makeJumbo() {
+        Opcode jumboOpcode = opcode.getJumboOpcode();
+        if (jumboOpcode == null) {
+            return null;
+        }
+
+        if (jumboOpcode.format == Format.Format31c) {
+            return new Instruction31c(jumboOpcode, (short)getRegisterA(), getReferencedItem());
+        }
+
+        return new Instruction41c(jumboOpcode, getRegisterA(), getReferencedItem());
+    }
+
+    private static class Factory implements Instruction.InstructionFactory {
+        public Instruction makeInstruction(DexFile dexFile, Opcode opcode, byte[] buffer, int bufferIndex) {
+            return new Instruction21c(dexFile, opcode, buffer, bufferIndex);
+        }
+    }
+}