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

[org.ibex.tool.git] / src / org / eclipse / jdt / internal / compiler / lookup / LocalVariableBinding.java

diff --git a/src/org/eclipse/jdt/internal/compiler/lookup/LocalVariableBinding.java b/src/org/eclipse/jdt/internal/compiler/lookup/LocalVariableBinding.java
new file mode 100644 (file)
index 0000000..0ab99f2
--- /dev/null
+++ b/src/org/eclipse/jdt/internal/compiler/lookup/LocalVariableBinding.java
@@ -0,0 +1,113 @@
+/*******************************************************************************
+ * 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.lookup;
+
+import org.eclipse.jdt.internal.compiler.ast.LocalDeclaration;
+import org.eclipse.jdt.internal.compiler.impl.Constant;
+
+public class LocalVariableBinding extends VariableBinding {
+
+       public boolean isArgument;
+       public int resolvedPosition; // for code generation (position in method context)
+       
+       public static final int UNUSED = 0;
+       public static final int USED = 1;
+       public static final int FAKE_USED = 2;
+       public int useFlag; // for flow analysis (default is UNUSED)
+       
+       public BlockScope declaringScope; // back-pointer to its declaring scope
+       public LocalDeclaration declaration; // for source-positions
+
+       public int[] initializationPCs;
+       public int initializationCount = 0;
+
+       // for synthetic local variables        
+       public LocalVariableBinding(char[] name, TypeBinding type, int modifiers, boolean isArgument) {
+
+               this.name = name;
+               this.type = type;
+               this.modifiers = modifiers;
+               this.isArgument = isArgument;
+               if (isArgument)
+                       this.constant = Constant.NotAConstant;
+       }
+       
+       // regular local variable or argument
+       public LocalVariableBinding(LocalDeclaration declaration, TypeBinding type, int modifiers, boolean isArgument) {
+
+               this(declaration.name, type, modifiers, isArgument);
+               this.declaration = declaration;
+       }
+
+       /* API
+       * Answer the receiver's binding type from Binding.BindingID.
+       */
+       public final int bindingType() {
+
+               return LOCAL;
+       }
+       
+       // Answer whether the variable binding is a secret variable added for code gen purposes
+       public boolean isSecret() {
+
+               return declaration == null && !isArgument;
+       }
+
+       public void recordInitializationEndPC(int pc) {
+
+               if (initializationPCs[((initializationCount - 1) << 1) + 1] == -1)
+                       initializationPCs[((initializationCount - 1) << 1) + 1] = pc;
+       }
+
+       public void recordInitializationStartPC(int pc) {
+
+               if (initializationPCs == null)  return;
+               // optimize cases where reopening a contiguous interval
+               if ((initializationCount > 0) && (initializationPCs[ ((initializationCount - 1) << 1) + 1] == pc)) {
+                       initializationPCs[ ((initializationCount - 1) << 1) + 1] = -1; // reuse previous interval (its range will be augmented)
+               } else {
+                       int index = initializationCount << 1;
+                       if (index == initializationPCs.length) {
+                               System.arraycopy(initializationPCs, 0, (initializationPCs = new int[initializationCount << 2]), 0, index);
+                       }
+                       initializationPCs[index] = pc;
+                       initializationPCs[index + 1] = -1;
+                       initializationCount++;
+               }
+       }
+
+       public String toString() {
+
+               String s = super.toString();
+               switch (useFlag){
+                       case USED:
+                               s += "[pos: " + String.valueOf(resolvedPosition) + "]"; //$NON-NLS-2$ //$NON-NLS-1$
+                               break;
+                       case UNUSED:
+                               s += "[pos: unused]"; //$NON-NLS-1$
+                               break;
+                       case FAKE_USED:
+                               s += "[pos: fake_used]"; //$NON-NLS-1$
+                               break;
+               }
+               s += "[id:" + String.valueOf(id) + "]"; //$NON-NLS-2$ //$NON-NLS-1$
+               if (initializationCount > 0) {
+                       s += "[pc: "; //$NON-NLS-1$
+                       for (int i = 0; i < initializationCount; i++) {
+                               if (i > 0)
+                                       s += ", "; //$NON-NLS-1$
+                               s += String.valueOf(initializationPCs[i << 1]) + "-" + ((initializationPCs[(i << 1) + 1] == -1) ? "?" : String.valueOf(initializationPCs[(i<< 1) + 1])); //$NON-NLS-2$ //$NON-NLS-1$
+                       }
+                       s += "]"; //$NON-NLS-1$
+               }
+               return s;
+       }
+}