removed Makefile; lifted repo/org.ibex.tool/src/ to src/

[org.ibex.tool.git] / src / org / eclipse / jdt / internal / compiler / ast / IntLiteral.java

diff --git a/src/org/eclipse/jdt/internal/compiler/ast/IntLiteral.java b/src/org/eclipse/jdt/internal/compiler/ast/IntLiteral.java
new file mode 100644 (file)
index 0000000..46a2172
--- /dev/null
+++ b/src/org/eclipse/jdt/internal/compiler/ast/IntLiteral.java
@@ -0,0 +1,150 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2004 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jdt.internal.compiler.ast;
+
+import org.eclipse.jdt.internal.compiler.ASTVisitor;
+import org.eclipse.jdt.internal.compiler.impl.*;
+import org.eclipse.jdt.internal.compiler.codegen.*;
+import org.eclipse.jdt.internal.compiler.lookup.*;
+
+public class IntLiteral extends NumberLiteral {
+       public int value;
+       
+       public static final IntLiteral
+               One = new IntLiteral(new char[]{'1'},0,0,1);//used for ++ and -- 
+
+       static final Constant FORMAT_ERROR = new DoubleConstant(1.0/0.0); // NaN;
+public IntLiteral(char[] token, int s, int e) {
+       super(token, s,e);
+}
+public IntLiteral(char[] token, int s,int e, int value) {
+       this(token, s,e);
+       this.value = value;
+}
+public IntLiteral(int intValue) {
+       //special optimized constructor : the cst is the argument 
+
+       //value that should not be used
+       //      tokens = null ;
+       //      sourceStart = 0;
+       //      sourceEnd = 0;
+       super(null,0,0);
+       constant = Constant.fromValue(intValue);
+       value = intValue;
+       
+}
+public void computeConstant() {
+       //a special constant is use for the potential Integer.MAX_VALUE+1
+       //which is legal if used with a - as prefix....cool....
+       //notice that Integer.MIN_VALUE  == -2147483648
+
+       long MAX = Integer.MAX_VALUE;
+       if (this == One) {      constant = Constant.One; return ;}
+       
+       int length = source.length;
+       long computedValue = 0L;
+       if (source[0] == '0')
+       {       MAX = 0xFFFFFFFFL ; //a long in order to be positive !  
+               if (length == 1) {      constant = Constant.fromValue(0); return ;}
+               final int shift,radix;
+               int j ;
+               if ( (source[1] == 'x') | (source[1] == 'X') )
+               {       shift = 4 ; j = 2; radix = 16;}
+               else
+               {       shift = 3 ; j = 1; radix = 8;}
+               while (source[j]=='0') 
+               {       j++; //jump over redondant zero
+                       if (j == length)
+                       {       //watch for 000000000000000000
+                               constant = Constant.fromValue(value = (int)computedValue);
+                               return ;}}
+               
+               while (j<length)
+               {       int digitValue ;
+                       if ((digitValue = Character.digit(source[j++],radix))   < 0 )   
+                       {       constant = FORMAT_ERROR; return ;}
+                       computedValue = (computedValue<<shift) | digitValue ;
+                       if (computedValue > MAX) return /*constant stays null*/ ;}}
+       else
+       {       //-----------regular case : radix = 10-----------
+               for (int i = 0 ; i < length;i++)
+               {       int digitValue ;
+                       if ((digitValue = Character.digit(source[i],10))        < 0 ) 
+                       {       constant = FORMAT_ERROR; return ;}
+                       computedValue = 10*computedValue + digitValue;
+                       if (computedValue > MAX) return /*constant stays null*/ ; }}
+
+       constant = Constant.fromValue(value = (int)computedValue);
+               
+}
+/**
+ * Code generation for int literal
+ *
+ * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
+ * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
+ * @param valueRequired boolean
+ */ 
+public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
+       int pc = codeStream.position;
+       if (valueRequired)
+               if ((implicitConversion >> 4) == T_int)
+                       codeStream.generateInlinedValue(value);
+               else
+                       codeStream.generateConstant(constant, implicitConversion);
+       codeStream.recordPositionsFrom(pc, this.sourceStart);
+}
+public TypeBinding literalType(BlockScope scope) {
+       return IntBinding;
+}
+public final boolean mayRepresentMIN_VALUE(){
+       //a special autorized int literral is 2147483648
+       //which is ONE over the limit. This special case 
+       //only is used in combinaison with - to denote
+       //the minimal value of int -2147483648
+
+       return ((source.length == 10) &&
+                       (source[0] == '2') &&
+                       (source[1] == '1') &&
+                       (source[2] == '4') &&
+                       (source[3] == '7') &&                   
+                       (source[4] == '4') &&
+                       (source[5] == '8') &&
+                       (source[6] == '3') &&
+                       (source[7] == '6') &&                   
+                       (source[8] == '4') &&
+                       (source[9] == '8'));}
+public TypeBinding resolveType(BlockScope scope) {
+       // the format may be incorrect while the scanner could detect
+       // such an error only on painfull tests...easier and faster here
+
+       TypeBinding tb = super.resolveType(scope);
+       if (constant == FORMAT_ERROR) {
+               constant = NotAConstant;
+               scope.problemReporter().constantOutOfFormat(this);
+               this.resolvedType = null;
+               return null;
+       }
+       return tb;
+}
+public StringBuffer printExpression(int indent, StringBuffer output){
+
+       if (source == null) {
+       /* special optimized IntLiteral that are created by the compiler */
+               return output.append(String.valueOf(value));
+       }
+       return super.printExpression(indent, output);
+}
+       
+public void traverse(ASTVisitor visitor, BlockScope scope) {
+       visitor.visit(this, scope);
+       visitor.endVisit(this, scope);
+}
+}