content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE 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 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE 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 AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * Copyright 2001-2004 The Apache Software Foundation.
   *
   * Licensed 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.
   */
  /*
   * $Id: IntType.java,v 1.2.4.1 2005/09/05 11:14:44 pvedula Exp $
   */
  
  package jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util;
  
  import jaxp.sun.org.apache.bcel.internal.generic.BranchHandle;
  import jaxp.sun.org.apache.bcel.internal.generic.BranchInstruction;
  import jaxp.sun.org.apache.bcel.internal.generic.CHECKCAST;
  import jaxp.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
  import jaxp.sun.org.apache.bcel.internal.generic.GOTO;
  import jaxp.sun.org.apache.bcel.internal.generic.IFEQ;
  import jaxp.sun.org.apache.bcel.internal.generic.IFGE;
  import jaxp.sun.org.apache.bcel.internal.generic.IFGT;
  import jaxp.sun.org.apache.bcel.internal.generic.IFLE;
  import jaxp.sun.org.apache.bcel.internal.generic.IFLT;
  import jaxp.sun.org.apache.bcel.internal.generic.IF_ICMPGE;
  import jaxp.sun.org.apache.bcel.internal.generic.IF_ICMPGT;
  import jaxp.sun.org.apache.bcel.internal.generic.IF_ICMPLE;
  import jaxp.sun.org.apache.bcel.internal.generic.IF_ICMPLT;
  import jaxp.sun.org.apache.bcel.internal.generic.ILOAD;
  import jaxp.sun.org.apache.bcel.internal.generic.INVOKESPECIAL;
  import jaxp.sun.org.apache.bcel.internal.generic.INVOKESTATIC;
  import jaxp.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL;
  import jaxp.sun.org.apache.bcel.internal.generic.ISTORE;
  import jaxp.sun.org.apache.bcel.internal.generic.Instruction;
  import jaxp.sun.org.apache.bcel.internal.generic.InstructionConstants;
  import jaxp.sun.org.apache.bcel.internal.generic.InstructionList;
  import jaxp.sun.org.apache.bcel.internal.generic.NEW;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.Constants;
  import jaxp.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 jaxp.sun.org.apache.bcel.internal.generic.Type toJCType() {
          return jaxp.sun.org.apache.bcel.internal.generic.Type.INT;
      }
  
      /**
       * @see     Type#distanceTo
       */
      public int distanceTo(Type type) {
          if (type == this) {
              return 0;
          }
          else if (type == Real) {
              return 1;
          }
          else
              return Integer.MAX_VALUE;
      }
  
      /**
       * Translates an integer into an object of internal type <code>type</code>.
       *
       * @see     Type#translateTo
       */
      public void translateTo(ClassGenerator classGen, MethodGenerator methodGen,
                              final Type type) {
          if (type == Real) {
              translateTo(classGen, methodGen, (RealType) type);
          }
          else if (type == String) {
              translateTo(classGen, methodGen, (StringType) type);
          }
          else if (type == Boolean) {
              translateTo(classGen, methodGen, (BooleanType) type);
          }
          else if (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     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
       * <code>Integer.toString(int i)</code>.
       *
       * @see     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     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     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
       * <code>java.lang.Integer</code>.
       *
       * @see     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,
                                                       "<init>", "(I)V")));
      }
  
      /**
       * Translates an integer into the Java type denoted by <code>clazz</code>.
       * 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);
             Real.translateTo(classGen, methodGen, Reference);
          }
          else {
              ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR,
                                          toString(), clazz.getName());
              classGen.getParser().reportError(FATAL, err);
          }
      }
  
      /**
       * Translates an object of this type to its boxed representation.
       */
      public void translateBox(ClassGenerator classGen,
                               MethodGenerator methodGen) {
          translateTo(classGen, methodGen, 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 ISUB;
      }
  
      public Instruction MUL() {
          return IMUL;
      }
  
      public Instruction DIV() {
          return IDIV;
      }
  
      public Instruction REM() {
          return IREM;
      }
  
      public Instruction NEG() {
          return 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);
      }
  }
  