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/*
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*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
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* file and include the License file at packager/legal/LICENSE.txt.
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* this work for additional information regarding copyright ownership.
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*
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*
* Unless required by applicable law or agreed to in writing, software
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/*
* $Id: IntType.java,v 1.10 2010-11-01 04:34:19 joehw Exp $
*/
package com.sun.org.apache.xalan.internal.xsltc.compiler.util;
import com.sun.org.apache.bcel.internal.generic.BranchHandle;
import com.sun.org.apache.bcel.internal.generic.BranchInstruction;
import com.sun.org.apache.bcel.internal.generic.CHECKCAST;
import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
import com.sun.org.apache.bcel.internal.generic.GOTO;
import com.sun.org.apache.bcel.internal.generic.IFEQ;
import com.sun.org.apache.bcel.internal.generic.IFGE;
import com.sun.org.apache.bcel.internal.generic.IFGT;
import com.sun.org.apache.bcel.internal.generic.IFLE;
import com.sun.org.apache.bcel.internal.generic.IFLT;
import com.sun.org.apache.bcel.internal.generic.IF_ICMPGE;
import com.sun.org.apache.bcel.internal.generic.IF_ICMPGT;
import com.sun.org.apache.bcel.internal.generic.IF_ICMPLE;
import com.sun.org.apache.bcel.internal.generic.IF_ICMPLT;
import com.sun.org.apache.bcel.internal.generic.ILOAD;
import com.sun.org.apache.bcel.internal.generic.INVOKESPECIAL;
import com.sun.org.apache.bcel.internal.generic.INVOKESTATIC;
import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL;
import com.sun.org.apache.bcel.internal.generic.ISTORE;
import com.sun.org.apache.bcel.internal.generic.Instruction;
import com.sun.org.apache.bcel.internal.generic.InstructionConstants;
import com.sun.org.apache.bcel.internal.generic.InstructionList;
import com.sun.org.apache.bcel.internal.generic.NEW;
import com.sun.org.apache.xalan.internal.xsltc.compiler.Constants;
import com.sun.org.apache.xalan.internal.xsltc.compiler.FlowList;
/**
* @author Jacek Ambroziak
* @author Santiago Pericas-Geertsen
*/
public final class IntType extends NumberType {
protected IntType() {}
public String toString() {
return "int";
}
public boolean identicalTo(Type other) {
return this == other;
}
public String toSignature() {
return "I";
}
public com.sun.org.apache.bcel.internal.generic.Type toJCType() {
return com.sun.org.apache.bcel.internal.generic.Type.INT;
}
/**
* @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#distanceTo
*/
public int distanceTo(Type type) {
if (type == this) {
return 0;
}
else if (type == Type.Real) {
return 1;
}
else
return Integer.MAX_VALUE;
}
/**
* Translates an integer into an object of internal type type.
*
* @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo
*/
public void translateTo(ClassGenerator classGen, MethodGenerator methodGen,
final Type type) {
if (type == Type.Real) {
translateTo(classGen, methodGen, (RealType) type);
}
else if (type == Type.String) {
translateTo(classGen, methodGen, (StringType) type);
}
else if (type == Type.Boolean) {
translateTo(classGen, methodGen, (BooleanType) type);
}
else if (type == Type.Reference) {
translateTo(classGen, methodGen, (ReferenceType) type);
}
else {
ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR,
toString(), type.toString());
classGen.getParser().reportError(Constants.FATAL, err);
}
}
/**
* Expects an integer on the stack and pushes a real.
*
* @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo
*/
public void translateTo(ClassGenerator classGen, MethodGenerator methodGen,
RealType type) {
methodGen.getInstructionList().append(I2D);
}
/**
* Expects an integer on the stack and pushes its string value by calling
* Integer.toString(int i).
*
* @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo
*/
public void translateTo(ClassGenerator classGen, MethodGenerator methodGen,
StringType type) {
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
il.append(new INVOKESTATIC(cpg.addMethodref(INTEGER_CLASS,
"toString",
"(I)" + STRING_SIG)));
}
/**
* Expects an integer on the stack and pushes a 0 if its value is 0 and
* a 1 otherwise.
*
* @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo
*/
public void translateTo(ClassGenerator classGen, MethodGenerator methodGen,
BooleanType type) {
final InstructionList il = methodGen.getInstructionList();
final BranchHandle falsec = il.append(new IFEQ(null));
il.append(ICONST_1);
final BranchHandle truec = il.append(new GOTO(null));
falsec.setTarget(il.append(ICONST_0));
truec.setTarget(il.append(NOP));
}
/**
* Expects an integer on the stack and translates it to a non-synthesized
* boolean. It does not push a 0 or a 1 but instead returns branchhandle
* list to be appended to the false list.
*
* @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateToDesynthesized
*/
public FlowList translateToDesynthesized(ClassGenerator classGen,
MethodGenerator methodGen,
BooleanType type) {
final InstructionList il = methodGen.getInstructionList();
return new FlowList(il.append(new IFEQ(null)));
}
/**
* Expects an integer on the stack and pushes a boxed integer.
* Boxed integers are represented by an instance of
* java.lang.Integer.
*
* @see com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type#translateTo
*/
public void translateTo(ClassGenerator classGen, MethodGenerator methodGen,
ReferenceType type) {
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
il.append(new NEW(cpg.addClass(INTEGER_CLASS)));
il.append(DUP_X1);
il.append(SWAP);
il.append(new INVOKESPECIAL(cpg.addMethodref(INTEGER_CLASS,
"", "(I)V")));
}
/**
* Translates an integer into the Java type denoted by clazz.
* Expects an integer on the stack and pushes a number of the appropriate
* type after coercion.
*/
public void translateTo(ClassGenerator classGen, MethodGenerator methodGen,
Class clazz) {
final InstructionList il = methodGen.getInstructionList();
if (clazz == Character.TYPE) {
il.append(I2C);
}
else if (clazz == Byte.TYPE) {
il.append(I2B);
}
else if (clazz == Short.TYPE) {
il.append(I2S);
}
else if (clazz == Integer.TYPE) {
il.append(NOP);
}
else if (clazz == Long.TYPE) {
il.append(I2L);
}
else if (clazz == Float.TYPE) {
il.append(I2F);
}
else if (clazz == Double.TYPE) {
il.append(I2D);
}
// Is Double <: clazz? I.e. clazz in { Double, Number, Object }
else if (clazz.isAssignableFrom(java.lang.Double.class)) {
il.append(I2D);
Type.Real.translateTo(classGen, methodGen, Type.Reference);
}
else {
ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR,
toString(), clazz.getName());
classGen.getParser().reportError(Constants.FATAL, err);
}
}
/**
* Translates an object of this type to its boxed representation.
*/
public void translateBox(ClassGenerator classGen,
MethodGenerator methodGen) {
translateTo(classGen, methodGen, Type.Reference);
}
/**
* Translates an object of this type to its unboxed representation.
*/
public void translateUnBox(ClassGenerator classGen,
MethodGenerator methodGen) {
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
il.append(new CHECKCAST(cpg.addClass(INTEGER_CLASS)));
final int index = cpg.addMethodref(INTEGER_CLASS,
INT_VALUE,
INT_VALUE_SIG);
il.append(new INVOKEVIRTUAL(index));
}
public Instruction ADD() {
return InstructionConstants.IADD;
}
public Instruction SUB() {
return InstructionConstants.ISUB;
}
public Instruction MUL() {
return InstructionConstants.IMUL;
}
public Instruction DIV() {
return InstructionConstants.IDIV;
}
public Instruction REM() {
return InstructionConstants.IREM;
}
public Instruction NEG() {
return InstructionConstants.INEG;
}
public Instruction LOAD(int slot) {
return new ILOAD(slot);
}
public Instruction STORE(int slot) {
return new ISTORE(slot);
}
public BranchInstruction GT(boolean tozero) {
return tozero ? (BranchInstruction) new IFGT(null) :
(BranchInstruction) new IF_ICMPGT(null);
}
public BranchInstruction GE(boolean tozero) {
return tozero ? (BranchInstruction) new IFGE(null) :
(BranchInstruction) new IF_ICMPGE(null);
}
public BranchInstruction LT(boolean tozero) {
return tozero ? (BranchInstruction) new IFLT(null) :
(BranchInstruction) new IF_ICMPLT(null);
}
public BranchInstruction LE(boolean tozero) {
return tozero ? (BranchInstruction) new IFLE(null) :
(BranchInstruction) new IF_ICMPLE(null);
}
}