merged src/java and src/rsc

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

diff --git a/src/org/eclipse/jdt/internal/compiler/ast/FloatLiteral.java b/src/org/eclipse/jdt/internal/compiler/ast/FloatLiteral.java
new file mode 100644 (file)
index 0000000..c7d53d6
--- /dev/null
+++ b/src/org/eclipse/jdt/internal/compiler/ast/FloatLiteral.java
@@ -0,0 +1,82 @@
+/*******************************************************************************
+ * 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 FloatLiteral extends NumberLiteral {
+       float value;
+       final static float Float_MIN_VALUE = Float.intBitsToFloat(1); // work-around VAJ problem 1F6IGUU
+public FloatLiteral(char[] token, int s, int e) {
+       super(token, s,e);
+}
+public void computeConstant() {
+
+       //the source is correctly formated so the exception should never occurs
+
+       Float computedValue;
+       try {
+               computedValue = Float.valueOf(String.valueOf(source));
+       } catch (NumberFormatException e) {
+               return;
+       } 
+
+       if (computedValue.doubleValue() > Float.MAX_VALUE){
+               return; //may be Infinity
+       }
+       if (computedValue.floatValue() < Float_MIN_VALUE){
+               // see 1F6IGUU
+               //only a true 0 can be made of zeros
+               //1.00000000e-46f is illegal ....
+               label : for (int i = 0; i < source.length; i++) { 
+                       switch (source[i]) {
+                               case '.' :
+                               case 'f' :
+                               case 'F' :
+                               case '0' :
+                                       break;
+                               case 'e' :
+                               case 'E' :
+                                       break label; //exposant are valid !....
+                               default :
+                                       return; //error
+                       }
+               }
+       }
+       constant = Constant.fromValue(value = computedValue.floatValue());
+}
+/**
+ * Code generation for float 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_float)
+                       codeStream.generateInlinedValue(value);
+               else
+                       codeStream.generateConstant(constant, implicitConversion);
+       codeStream.recordPositionsFrom(pc, this.sourceStart);
+}
+public TypeBinding literalType(BlockScope scope) {
+       return FloatBinding;
+}
+public void traverse(ASTVisitor visitor, BlockScope blockScope) {
+       visitor.visit(this, blockScope);
+       visitor.endVisit(this, blockScope);
+}
+}