1 files changed, 124 insertions, 0 deletions
diff --git a/src/org/jetbrains/java/decompiler/code/Instruction.java b/src/org/jetbrains/java/decompiler/code/Instruction.java
new file mode 100644
index 0000000..faa8926
--- /dev/null
+++ b/src/org/jetbrains/java/decompiler/code/Instruction.java
@@ -0,0 +1,124 @@
+/*
+ *    Fernflower - The Analytical Java Decompiler
+ *    http://www.reversed-java.com
+ *
+ *    (C) 2008 - 2010, Stiver
+ *
+ *    This software is NEITHER public domain NOR free software 
+ *    as per GNU License. See license.txt for more details.
+ *
+ *    This software is distributed WITHOUT ANY WARRANTY; without 
+ *    even the implied warranty of MERCHANTABILITY or FITNESS FOR 
+ *    A PARTICULAR PURPOSE. 
+ */
+
+package org.jetbrains.java.decompiler.code;
+
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+public class Instruction implements CodeConstants {
+
+	// *****************************************************************************
+	// public fields
+	// *****************************************************************************
+	
+	public int opcode;
+	
+	public int group = CodeConstants.GROUP_GENERAL;
+	
+	public boolean wide = false;
+	
+	public int bytecode_version = BYTECODE_JAVA_LE_4;
+	
+	// *****************************************************************************
+	// private fields
+	// *****************************************************************************
+	
+	private int[] operands = null;
+	
+	// *****************************************************************************
+	// public methods
+	// *****************************************************************************
+
+	public Instruction() {}
+	
+	public int length() {
+		return 1;
+	}
+	
+	public int operandsCount() {
+		return (operands==null)?0:operands.length; 
+	}
+	
+	public int getOperand(int index) {
+		return operands[index];
+	}
+	
+	public Instruction clone() {
+		return ConstantsUtil.getInstructionInstance(opcode, wide, group, bytecode_version, operands==null?null:(int[])operands.clone());
+	}
+	
+	public String toString() {
+		
+		String res = wide?"@wide ":"";
+		res+="@"+ConstantsUtil.getName(opcode); 
+
+		int len = operandsCount();
+		for(int i=0;i<len;i++) {
+			int op = operands[i];
+			if(op<0) {
+				res+=" -"+Integer.toHexString(-op);
+			} else {
+				res+=" "+Integer.toHexString(op);
+			}
+		}
+		
+		return res;
+		
+	}
+	
+	public boolean canFallthrough() {
+		return opcode!=opc_goto && opcode!=opc_goto_w && opcode!=opc_ret && 
+		!(opcode>=opc_ireturn && opcode<=opc_return) && opcode!=opc_athrow
+		 && opcode!=opc_jsr && opcode!=opc_tableswitch && opcode!=opc_lookupswitch; 
+	}
+
+	public boolean equalsInstruction(Instruction instr) {
+		if(opcode != instr.opcode || wide != instr.wide
+				|| operandsCount() != instr.operandsCount()) {
+			return false;
+		}
+		
+		if(operands != null) {
+			for(int i=0;i<operands.length;i++) {
+				if(operands[i] != instr.getOperand(i)) {
+					return false;
+				}
+			}
+		}
+		
+		return true;
+	}
+	
+	// should be overwritten by subclasses
+	public void initInstruction(InstructionSequence seq) {}
+
+	// should be overwritten by subclasses
+	public void writeToStream(DataOutputStream out, int offset) throws IOException {
+		out.writeByte(opcode);
+	}
+	
+	// *****************************************************************************
+	// getter and setter methods
+	// *****************************************************************************
+	
+	public int[] getOperands() {
+		return operands;
+	}
+
+	public void setOperands(int[] operands) {
+		this.operands = operands;
+	}
+	
+}