| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| package org.apache.bcel.generic; |
| |
| import org.apache.bcel.Const; |
| |
| /** |
| * Instances of this class may be used, e.g., to generate typed |
| * versions of instructions. Its main purpose is to be used as the |
| * byte code generating backend of a compiler. You can subclass it to |
| * add your own create methods. |
| * <p> |
| * Note: The static createXXX methods return singleton instances |
| * from the {@link InstructionConst} class. |
| * |
| * @see Const |
| * @see InstructionConst |
| */ |
| public class InstructionFactory implements InstructionConstants { |
| |
| // N.N. These must agree with the order of Constants.T_CHAR through T_LONG |
| private static final String[] short_names = { |
| "C", "F", "D", "B", "S", "I", "L" |
| }; |
| |
| /** |
| * @deprecated (since 6.0) will be made private; do not access directly, use getter/setter |
| */ |
| @Deprecated |
| protected ClassGen cg; |
| |
| /** |
| * @deprecated (since 6.0) will be made private; do not access directly, use getter/setter |
| */ |
| @Deprecated |
| protected ConstantPoolGen cp; |
| |
| |
| public InstructionFactory(final ClassGen cg, final ConstantPoolGen cp) { |
| this.cg = cg; |
| this.cp = cp; |
| } |
| |
| |
| /** Initialize with ClassGen object |
| */ |
| public InstructionFactory(final ClassGen cg) { |
| this(cg, cg.getConstantPool()); |
| } |
| |
| |
| /** Initialize just with ConstantPoolGen object |
| */ |
| public InstructionFactory(final ConstantPoolGen cp) { |
| this(null, cp); |
| } |
| |
| |
| /** Create an invoke instruction. (Except for invokedynamic.) |
| * |
| * @param class_name name of the called class |
| * @param name name of the called method |
| * @param ret_type return type of method |
| * @param arg_types argument types of method |
| * @param kind how to invoke, i.e., INVOKEINTERFACE, INVOKESTATIC, INVOKEVIRTUAL, |
| * or INVOKESPECIAL |
| * @see Const |
| */ |
| public InvokeInstruction createInvoke( final String class_name, final String name, final Type ret_type, |
| final Type[] arg_types, final short kind ) { |
| return createInvoke(class_name, name, ret_type, arg_types, kind, kind == Const.INVOKEINTERFACE); |
| } |
| |
| /** Create an invoke instruction. (Except for invokedynamic.) |
| * |
| * @param class_name name of the called class |
| * @param name name of the called method |
| * @param ret_type return type of method |
| * @param arg_types argument types of method |
| * @param kind how to invoke: INVOKEINTERFACE, INVOKESTATIC, INVOKEVIRTUAL, or INVOKESPECIAL |
| * @param use_interface force use of InterfaceMethodref |
| * @return A new InvokeInstruction. |
| * @since 6.5.0 |
| */ |
| public InvokeInstruction createInvoke( final String class_name, final String name, final Type ret_type, |
| final Type[] arg_types, final short kind, final boolean use_interface) { |
| if (kind != Const.INVOKESPECIAL && kind != Const.INVOKEVIRTUAL && kind != Const.INVOKESTATIC |
| && kind != Const.INVOKEINTERFACE && kind != Const.INVOKEDYNAMIC) { |
| throw new IllegalArgumentException("Unknown invoke kind: " + kind); |
| } |
| int index; |
| int nargs = 0; |
| final String signature = Type.getMethodSignature(ret_type, arg_types); |
| for (final Type arg_type : arg_types) { |
| nargs += arg_type.getSize(); |
| } |
| if (use_interface) { |
| index = cp.addInterfaceMethodref(class_name, name, signature); |
| } else { |
| index = cp.addMethodref(class_name, name, signature); |
| } |
| switch (kind) { |
| case Const.INVOKESPECIAL: |
| return new INVOKESPECIAL(index); |
| case Const.INVOKEVIRTUAL: |
| return new INVOKEVIRTUAL(index); |
| case Const.INVOKESTATIC: |
| return new INVOKESTATIC(index); |
| case Const.INVOKEINTERFACE: |
| return new INVOKEINTERFACE(index, nargs + 1); |
| case Const.INVOKEDYNAMIC: |
| return new INVOKEDYNAMIC(index); |
| default: |
| // Can't happen |
| throw new IllegalStateException("Unknown invoke kind: " + kind); |
| } |
| } |
| |
| /** Create an invokedynamic instruction. |
| * |
| * @param bootstrap_index index into the bootstrap_methods array |
| * @param name name of the called method |
| * @param ret_type return type of method |
| * @param arg_types argument types of method |
| * @see Constants |
| */ |
| /* |
| * createInvokeDynamic only needed if instrumention code wants to generate |
| * a new invokedynamic instruction. I don't think we need. (markro) |
| * |
| public InvokeInstruction createInvokeDynamic( int bootstrap_index, String name, Type ret_type, |
| Type[] arg_types) { |
| int index; |
| int nargs = 0; |
| String signature = Type.getMethodSignature(ret_type, arg_types); |
| for (int i = 0; i < arg_types.length; i++) { |
| nargs += arg_types[i].getSize(); |
| } |
| // UNDONE - needs to be added to ConstantPoolGen |
| //index = cp.addInvokeDynamic(bootstrap_index, name, signature); |
| index = 0; |
| return new INVOKEDYNAMIC(index); |
| } |
| */ |
| |
| /** Create a call to the most popular System.out.println() method. |
| * |
| * @param s the string to print |
| */ |
| public InstructionList createPrintln( final String s ) { |
| final InstructionList il = new InstructionList(); |
| final int out = cp.addFieldref("java.lang.System", "out", "Ljava/io/PrintStream;"); |
| final int println = cp.addMethodref("java.io.PrintStream", "println", "(Ljava/lang/String;)V"); |
| il.append(new GETSTATIC(out)); |
| il.append(new PUSH(cp, s)); |
| il.append(new INVOKEVIRTUAL(println)); |
| return il; |
| } |
| |
| |
| /** Uses PUSH to push a constant value onto the stack. |
| * @param value must be of type Number, Boolean, Character or String |
| */ |
| public Instruction createConstant( final Object value ) { |
| PUSH push; |
| if (value instanceof Number) { |
| push = new PUSH(cp, (Number) value); |
| } else if (value instanceof String) { |
| push = new PUSH(cp, (String) value); |
| } else if (value instanceof Boolean) { |
| push = new PUSH(cp, (Boolean) value); |
| } else if (value instanceof Character) { |
| push = new PUSH(cp, (Character) value); |
| } else { |
| throw new ClassGenException("Illegal type: " + value.getClass()); |
| } |
| return push.getInstruction(); |
| } |
| |
| private static class MethodObject { |
| |
| final Type[] arg_types; |
| final Type result_type; |
| final String class_name; |
| final String name; |
| |
| |
| MethodObject(final String c, final String n, final Type r, final Type[] a) { |
| class_name = c; |
| name = n; |
| result_type = r; |
| arg_types = a; |
| } |
| } |
| |
| |
| private InvokeInstruction createInvoke( final MethodObject m, final short kind ) { |
| return createInvoke(m.class_name, m.name, m.result_type, m.arg_types, kind); |
| } |
| |
| private static final MethodObject[] append_mos = { |
| new MethodObject("java.lang.StringBuffer", "append", Type.STRINGBUFFER, new Type[] { |
| Type.STRING |
| }), |
| new MethodObject("java.lang.StringBuffer", "append", Type.STRINGBUFFER, new Type[] { |
| Type.OBJECT |
| }), |
| null, |
| null, // indices 2, 3 |
| new MethodObject("java.lang.StringBuffer", "append", Type.STRINGBUFFER, new Type[] { |
| Type.BOOLEAN |
| }), |
| new MethodObject("java.lang.StringBuffer", "append", Type.STRINGBUFFER, new Type[] { |
| Type.CHAR |
| }), |
| new MethodObject("java.lang.StringBuffer", "append", Type.STRINGBUFFER, new Type[] { |
| Type.FLOAT |
| }), |
| new MethodObject("java.lang.StringBuffer", "append", Type.STRINGBUFFER, new Type[] { |
| Type.DOUBLE |
| }), |
| new MethodObject("java.lang.StringBuffer", "append", Type.STRINGBUFFER, new Type[] { |
| Type.INT |
| }), |
| new MethodObject("java.lang.StringBuffer", "append", Type.STRINGBUFFER, // No append(byte) |
| new Type[] { |
| Type.INT |
| }), |
| new MethodObject("java.lang.StringBuffer", "append", Type.STRINGBUFFER, // No append(short) |
| new Type[] { |
| Type.INT |
| }), |
| new MethodObject("java.lang.StringBuffer", "append", Type.STRINGBUFFER, new Type[] { |
| Type.LONG |
| }) |
| }; |
| |
| |
| private static boolean isString( final Type type ) { |
| return (type instanceof ObjectType) && |
| ((ObjectType) type).getClassName().equals("java.lang.String"); |
| } |
| |
| |
| public Instruction createAppend( final Type type ) { |
| final byte t = type.getType(); |
| if (isString(type)) { |
| return createInvoke(append_mos[0], Const.INVOKEVIRTUAL); |
| } |
| switch (t) { |
| case Const.T_BOOLEAN: |
| case Const.T_CHAR: |
| case Const.T_FLOAT: |
| case Const.T_DOUBLE: |
| case Const.T_BYTE: |
| case Const.T_SHORT: |
| case Const.T_INT: |
| case Const.T_LONG: |
| return createInvoke(append_mos[t], Const.INVOKEVIRTUAL); |
| case Const.T_ARRAY: |
| case Const.T_OBJECT: |
| return createInvoke(append_mos[1], Const.INVOKEVIRTUAL); |
| default: |
| throw new IllegalArgumentException("No append for this type? " + type); |
| } |
| } |
| |
| |
| /** Create a field instruction. |
| * |
| * @param class_name name of the accessed class |
| * @param name name of the referenced field |
| * @param type type of field |
| * @param kind how to access, i.e., GETFIELD, PUTFIELD, GETSTATIC, PUTSTATIC |
| * @see Const |
| */ |
| public FieldInstruction createFieldAccess( final String class_name, final String name, final Type type, final short kind ) { |
| int index; |
| final String signature = type.getSignature(); |
| index = cp.addFieldref(class_name, name, signature); |
| switch (kind) { |
| case Const.GETFIELD: |
| return new GETFIELD(index); |
| case Const.PUTFIELD: |
| return new PUTFIELD(index); |
| case Const.GETSTATIC: |
| return new GETSTATIC(index); |
| case Const.PUTSTATIC: |
| return new PUTSTATIC(index); |
| default: |
| throw new IllegalArgumentException("Unknown getfield kind:" + kind); |
| } |
| } |
| |
| |
| /** Create reference to `this' |
| */ |
| public static Instruction createThis() { |
| return new ALOAD(0); |
| } |
| |
| |
| /** Create typed return |
| */ |
| public static ReturnInstruction createReturn( final Type type ) { |
| switch (type.getType()) { |
| case Const.T_ARRAY: |
| case Const.T_OBJECT: |
| return InstructionConst.ARETURN; |
| case Const.T_INT: |
| case Const.T_SHORT: |
| case Const.T_BOOLEAN: |
| case Const.T_CHAR: |
| case Const.T_BYTE: |
| return InstructionConst.IRETURN; |
| case Const.T_FLOAT: |
| return InstructionConst.FRETURN; |
| case Const.T_DOUBLE: |
| return InstructionConst.DRETURN; |
| case Const.T_LONG: |
| return InstructionConst.LRETURN; |
| case Const.T_VOID: |
| return InstructionConst.RETURN; |
| default: |
| throw new IllegalArgumentException("Invalid type: " + type); |
| } |
| } |
| |
| |
| private static ArithmeticInstruction createBinaryIntOp( final char first, final String op ) { |
| switch (first) { |
| case '-': |
| return InstructionConst.ISUB; |
| case '+': |
| return InstructionConst.IADD; |
| case '%': |
| return InstructionConst.IREM; |
| case '*': |
| return InstructionConst.IMUL; |
| case '/': |
| return InstructionConst.IDIV; |
| case '&': |
| return InstructionConst.IAND; |
| case '|': |
| return InstructionConst.IOR; |
| case '^': |
| return InstructionConst.IXOR; |
| case '<': |
| return InstructionConst.ISHL; |
| case '>': |
| return op.equals(">>>") ? InstructionConst.IUSHR : InstructionConst.ISHR; |
| default: |
| throw new IllegalArgumentException("Invalid operand " + op); |
| } |
| } |
| |
| |
| private static ArithmeticInstruction createBinaryLongOp( final char first, final String op ) { |
| switch (first) { |
| case '-': |
| return InstructionConst.LSUB; |
| case '+': |
| return InstructionConst.LADD; |
| case '%': |
| return InstructionConst.LREM; |
| case '*': |
| return InstructionConst.LMUL; |
| case '/': |
| return InstructionConst.LDIV; |
| case '&': |
| return InstructionConst.LAND; |
| case '|': |
| return InstructionConst.LOR; |
| case '^': |
| return InstructionConst.LXOR; |
| case '<': |
| return InstructionConst.LSHL; |
| case '>': |
| return op.equals(">>>") ? InstructionConst.LUSHR : InstructionConst.LSHR; |
| default: |
| throw new IllegalArgumentException("Invalid operand " + op); |
| } |
| } |
| |
| |
| private static ArithmeticInstruction createBinaryFloatOp( final char op ) { |
| switch (op) { |
| case '-': |
| return InstructionConst.FSUB; |
| case '+': |
| return InstructionConst.FADD; |
| case '*': |
| return InstructionConst.FMUL; |
| case '/': |
| return InstructionConst.FDIV; |
| case '%': |
| return InstructionConst.FREM; |
| default: |
| throw new IllegalArgumentException("Invalid operand " + op); |
| } |
| } |
| |
| |
| private static ArithmeticInstruction createBinaryDoubleOp( final char op ) { |
| switch (op) { |
| case '-': |
| return InstructionConst.DSUB; |
| case '+': |
| return InstructionConst.DADD; |
| case '*': |
| return InstructionConst.DMUL; |
| case '/': |
| return InstructionConst.DDIV; |
| case '%': |
| return InstructionConst.DREM; |
| default: |
| throw new IllegalArgumentException("Invalid operand " + op); |
| } |
| } |
| |
| |
| /** |
| * Create binary operation for simple basic types, such as int and float. |
| * |
| * @param op operation, such as "+", "*", "<<", etc. |
| */ |
| public static ArithmeticInstruction createBinaryOperation( final String op, final Type type ) { |
| final char first = op.charAt(0); |
| switch (type.getType()) { |
| case Const.T_BYTE: |
| case Const.T_SHORT: |
| case Const.T_INT: |
| case Const.T_CHAR: |
| return createBinaryIntOp(first, op); |
| case Const.T_LONG: |
| return createBinaryLongOp(first, op); |
| case Const.T_FLOAT: |
| return createBinaryFloatOp(first); |
| case Const.T_DOUBLE: |
| return createBinaryDoubleOp(first); |
| default: |
| throw new IllegalArgumentException("Invalid type " + type); |
| } |
| } |
| |
| |
| /** |
| * @param size size of operand, either 1 (int, e.g.) or 2 (double) |
| */ |
| public static StackInstruction createPop( final int size ) { |
| return (size == 2) ? InstructionConst.POP2 : InstructionConst.POP; |
| } |
| |
| |
| /** |
| * @param size size of operand, either 1 (int, e.g.) or 2 (double) |
| */ |
| public static StackInstruction createDup( final int size ) { |
| return (size == 2) ? InstructionConst.DUP2 : InstructionConst.DUP; |
| } |
| |
| |
| /** |
| * @param size size of operand, either 1 (int, e.g.) or 2 (double) |
| */ |
| public static StackInstruction createDup_2( final int size ) { |
| return (size == 2) ? InstructionConst.DUP2_X2 : InstructionConst.DUP_X2; |
| } |
| |
| |
| /** |
| * @param size size of operand, either 1 (int, e.g.) or 2 (double) |
| */ |
| public static StackInstruction createDup_1( final int size ) { |
| return (size == 2) ? InstructionConst.DUP2_X1 : InstructionConst.DUP_X1; |
| } |
| |
| |
| /** |
| * @param index index of local variable |
| */ |
| public static LocalVariableInstruction createStore( final Type type, final int index ) { |
| switch (type.getType()) { |
| case Const.T_BOOLEAN: |
| case Const.T_CHAR: |
| case Const.T_BYTE: |
| case Const.T_SHORT: |
| case Const.T_INT: |
| return new ISTORE(index); |
| case Const.T_FLOAT: |
| return new FSTORE(index); |
| case Const.T_DOUBLE: |
| return new DSTORE(index); |
| case Const.T_LONG: |
| return new LSTORE(index); |
| case Const.T_ARRAY: |
| case Const.T_OBJECT: |
| return new ASTORE(index); |
| default: |
| throw new IllegalArgumentException("Invalid type " + type); |
| } |
| } |
| |
| |
| /** |
| * @param index index of local variable |
| */ |
| public static LocalVariableInstruction createLoad( final Type type, final int index ) { |
| switch (type.getType()) { |
| case Const.T_BOOLEAN: |
| case Const.T_CHAR: |
| case Const.T_BYTE: |
| case Const.T_SHORT: |
| case Const.T_INT: |
| return new ILOAD(index); |
| case Const.T_FLOAT: |
| return new FLOAD(index); |
| case Const.T_DOUBLE: |
| return new DLOAD(index); |
| case Const.T_LONG: |
| return new LLOAD(index); |
| case Const.T_ARRAY: |
| case Const.T_OBJECT: |
| return new ALOAD(index); |
| default: |
| throw new IllegalArgumentException("Invalid type " + type); |
| } |
| } |
| |
| |
| /** |
| * @param type type of elements of array, i.e., array.getElementType() |
| */ |
| public static ArrayInstruction createArrayLoad( final Type type ) { |
| switch (type.getType()) { |
| case Const.T_BOOLEAN: |
| case Const.T_BYTE: |
| return InstructionConst.BALOAD; |
| case Const.T_CHAR: |
| return InstructionConst.CALOAD; |
| case Const.T_SHORT: |
| return InstructionConst.SALOAD; |
| case Const.T_INT: |
| return InstructionConst.IALOAD; |
| case Const.T_FLOAT: |
| return InstructionConst.FALOAD; |
| case Const.T_DOUBLE: |
| return InstructionConst.DALOAD; |
| case Const.T_LONG: |
| return InstructionConst.LALOAD; |
| case Const.T_ARRAY: |
| case Const.T_OBJECT: |
| return InstructionConst.AALOAD; |
| default: |
| throw new IllegalArgumentException("Invalid type " + type); |
| } |
| } |
| |
| |
| /** |
| * @param type type of elements of array, i.e., array.getElementType() |
| */ |
| public static ArrayInstruction createArrayStore( final Type type ) { |
| switch (type.getType()) { |
| case Const.T_BOOLEAN: |
| case Const.T_BYTE: |
| return InstructionConst.BASTORE; |
| case Const.T_CHAR: |
| return InstructionConst.CASTORE; |
| case Const.T_SHORT: |
| return InstructionConst.SASTORE; |
| case Const.T_INT: |
| return InstructionConst.IASTORE; |
| case Const.T_FLOAT: |
| return InstructionConst.FASTORE; |
| case Const.T_DOUBLE: |
| return InstructionConst.DASTORE; |
| case Const.T_LONG: |
| return InstructionConst.LASTORE; |
| case Const.T_ARRAY: |
| case Const.T_OBJECT: |
| return InstructionConst.AASTORE; |
| default: |
| throw new IllegalArgumentException("Invalid type " + type); |
| } |
| } |
| |
| |
| /** Create conversion operation for two stack operands, this may be an I2C, instruction, e.g., |
| * if the operands are basic types and CHECKCAST if they are reference types. |
| */ |
| public Instruction createCast( final Type src_type, final Type dest_type ) { |
| if ((src_type instanceof BasicType) && (dest_type instanceof BasicType)) { |
| final byte dest = dest_type.getType(); |
| byte src = src_type.getType(); |
| if (dest == Const.T_LONG |
| && (src == Const.T_CHAR || src == Const.T_BYTE || src == Const.T_SHORT)) { |
| src = Const.T_INT; |
| } |
| final String name = "org.apache.bcel.generic." + short_names[src - Const.T_CHAR] + "2" |
| + short_names[dest - Const.T_CHAR]; |
| Instruction i = null; |
| try { |
| i = (Instruction) java.lang.Class.forName(name).newInstance(); |
| } catch (final Exception e) { |
| throw new IllegalArgumentException("Could not find instruction: " + name, e); |
| } |
| return i; |
| } |
| if (!(src_type instanceof ReferenceType) || !(dest_type instanceof ReferenceType)) { |
| throw new IllegalArgumentException("Cannot cast " + src_type + " to " + dest_type); |
| } |
| if (dest_type instanceof ArrayType) { |
| return new CHECKCAST(cp.addArrayClass((ArrayType) dest_type)); |
| } |
| return new CHECKCAST(cp.addClass(((ObjectType) dest_type).getClassName())); |
| } |
| |
| |
| public GETFIELD createGetField( final String class_name, final String name, final Type t ) { |
| return new GETFIELD(cp.addFieldref(class_name, name, t.getSignature())); |
| } |
| |
| |
| public GETSTATIC createGetStatic( final String class_name, final String name, final Type t ) { |
| return new GETSTATIC(cp.addFieldref(class_name, name, t.getSignature())); |
| } |
| |
| |
| public PUTFIELD createPutField( final String class_name, final String name, final Type t ) { |
| return new PUTFIELD(cp.addFieldref(class_name, name, t.getSignature())); |
| } |
| |
| |
| public PUTSTATIC createPutStatic( final String class_name, final String name, final Type t ) { |
| return new PUTSTATIC(cp.addFieldref(class_name, name, t.getSignature())); |
| } |
| |
| |
| public CHECKCAST createCheckCast( final ReferenceType t ) { |
| if (t instanceof ArrayType) { |
| return new CHECKCAST(cp.addArrayClass((ArrayType) t)); |
| } |
| return new CHECKCAST(cp.addClass((ObjectType) t)); |
| } |
| |
| |
| public INSTANCEOF createInstanceOf( final ReferenceType t ) { |
| if (t instanceof ArrayType) { |
| return new INSTANCEOF(cp.addArrayClass((ArrayType) t)); |
| } |
| return new INSTANCEOF(cp.addClass((ObjectType) t)); |
| } |
| |
| |
| public NEW createNew( final ObjectType t ) { |
| return new NEW(cp.addClass(t)); |
| } |
| |
| |
| public NEW createNew( final String s ) { |
| return createNew(ObjectType.getInstance(s)); |
| } |
| |
| |
| /** Create new array of given size and type. |
| * @return an instruction that creates the corresponding array at runtime, i.e. is an AllocationInstruction |
| */ |
| public Instruction createNewArray( final Type t, final short dim ) { |
| if (dim == 1) { |
| if (t instanceof ObjectType) { |
| return new ANEWARRAY(cp.addClass((ObjectType) t)); |
| } |
| if (t instanceof ArrayType) { |
| return new ANEWARRAY(cp.addArrayClass((ArrayType) t)); |
| } |
| return new NEWARRAY(t.getType()); |
| } |
| ArrayType at; |
| if (t instanceof ArrayType) { |
| at = (ArrayType) t; |
| } else { |
| at = new ArrayType(t, dim); |
| } |
| return new MULTIANEWARRAY(cp.addArrayClass(at), dim); |
| } |
| |
| |
| /** Create "null" value for reference types, 0 for basic types like int |
| */ |
| public static Instruction createNull( final Type type ) { |
| switch (type.getType()) { |
| case Const.T_ARRAY: |
| case Const.T_OBJECT: |
| return InstructionConst.ACONST_NULL; |
| case Const.T_INT: |
| case Const.T_SHORT: |
| case Const.T_BOOLEAN: |
| case Const.T_CHAR: |
| case Const.T_BYTE: |
| return InstructionConst.ICONST_0; |
| case Const.T_FLOAT: |
| return InstructionConst.FCONST_0; |
| case Const.T_DOUBLE: |
| return InstructionConst.DCONST_0; |
| case Const.T_LONG: |
| return InstructionConst.LCONST_0; |
| case Const.T_VOID: |
| return InstructionConst.NOP; |
| default: |
| throw new IllegalArgumentException("Invalid type: " + type); |
| } |
| } |
| |
| |
| /** Create branch instruction by given opcode, except LOOKUPSWITCH and TABLESWITCH. |
| * For those you should use the SWITCH compound instruction. |
| */ |
| public static BranchInstruction createBranchInstruction( final short opcode, final InstructionHandle target ) { |
| switch (opcode) { |
| case Const.IFEQ: |
| return new IFEQ(target); |
| case Const.IFNE: |
| return new IFNE(target); |
| case Const.IFLT: |
| return new IFLT(target); |
| case Const.IFGE: |
| return new IFGE(target); |
| case Const.IFGT: |
| return new IFGT(target); |
| case Const.IFLE: |
| return new IFLE(target); |
| case Const.IF_ICMPEQ: |
| return new IF_ICMPEQ(target); |
| case Const.IF_ICMPNE: |
| return new IF_ICMPNE(target); |
| case Const.IF_ICMPLT: |
| return new IF_ICMPLT(target); |
| case Const.IF_ICMPGE: |
| return new IF_ICMPGE(target); |
| case Const.IF_ICMPGT: |
| return new IF_ICMPGT(target); |
| case Const.IF_ICMPLE: |
| return new IF_ICMPLE(target); |
| case Const.IF_ACMPEQ: |
| return new IF_ACMPEQ(target); |
| case Const.IF_ACMPNE: |
| return new IF_ACMPNE(target); |
| case Const.GOTO: |
| return new GOTO(target); |
| case Const.JSR: |
| return new JSR(target); |
| case Const.IFNULL: |
| return new IFNULL(target); |
| case Const.IFNONNULL: |
| return new IFNONNULL(target); |
| case Const.GOTO_W: |
| return new GOTO_W(target); |
| case Const.JSR_W: |
| return new JSR_W(target); |
| default: |
| throw new IllegalArgumentException("Invalid opcode: " + opcode); |
| } |
| } |
| |
| |
| public void setClassGen( final ClassGen c ) { |
| cg = c; |
| } |
| |
| |
| public ClassGen getClassGen() { |
| return cg; |
| } |
| |
| |
| public void setConstantPool( final ConstantPoolGen c ) { |
| cp = c; |
| } |
| |
| |
| public ConstantPoolGen getConstantPool() { |
| return cp; |
| } |
| } |
