1 files changed, 121 insertions, 0 deletions
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPUsingDirective.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPUsingDirective.java
new file mode 100644
index 00000000000..dd957b2264b
--- /dev/null
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPUsingDirective.java
@@ -0,0 +1,121 @@
+/*******************************************************************************
+ * Copyright (c) 2008 Wind River Systems, Inc. and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Markus Schorn - initial API and implementation
+ *******************************************************************************/ 
+package org.eclipse.cdt.internal.core.pdom.dom.cpp;
+
+import org.eclipse.cdt.core.CCorePlugin;
+import org.eclipse.cdt.core.dom.IPDOMNode;
+import org.eclipse.cdt.core.dom.IPDOMVisitor;
+import org.eclipse.cdt.core.dom.ast.DOMException;
+import org.eclipse.cdt.core.dom.ast.IScope;
+import org.eclipse.cdt.core.dom.ast.cpp.ICPPNamespace;
+import org.eclipse.cdt.core.dom.ast.cpp.ICPPNamespaceScope;
+import org.eclipse.cdt.core.dom.ast.cpp.ICPPUsingDirective;
+import org.eclipse.cdt.internal.core.pdom.db.Database;
+import org.eclipse.cdt.internal.core.pdom.dom.PDOMBinding;
+import org.eclipse.cdt.internal.core.pdom.dom.PDOMLinkage;
+import org.eclipse.cdt.internal.core.pdom.dom.PDOMNode;
+import org.eclipse.core.runtime.CoreException;
+
+/**
+ * Stores using directives for global or namespace scope. Directives for block-scopes 
+ * are not persisted in the index.
+ * For performance reasons the directives are not stored with their container. Rather
+ * than that they are stored with the file, in which they are encountered. 
+ * When parsing a file the directives from headers that are skipped are collected.
+ */
+public class PDOMCPPUsingDirective implements ICPPUsingDirective, IPDOMNode {
+	private static final int CONTAINER_NAMESPACE 	= 0;
+	private static final int NOMINATED_NAMESPACE    = 4;
+	private static final int PREV_DIRECTIVE_OF_FILE	= 8;
+	private static final int RECORD_SIZE 			= 12;
+
+	private final PDOMCPPLinkage fLinkage;
+	private final int fRecord;
+
+	PDOMCPPUsingDirective(PDOMCPPLinkage pdom, int record) {
+		fLinkage= pdom;
+		fRecord= record;
+	}
+
+	public PDOMCPPUsingDirective(PDOMCPPLinkage linkage, int prevRecInFile, PDOMCPPNamespace containerNS, PDOMBinding nominated) throws CoreException {
+		final Database db= linkage.getPDOM().getDB();
+		final int containerRec= containerNS == null ? 0 : containerNS.getRecord();
+		final int nominatedRec= nominated.getRecord();
+		
+		fLinkage= linkage;
+		fRecord= db.malloc(RECORD_SIZE);
+		db.putInt(fRecord + CONTAINER_NAMESPACE, containerRec);
+		db.putInt(fRecord + NOMINATED_NAMESPACE, nominatedRec);
+		db.putInt(fRecord + PREV_DIRECTIVE_OF_FILE, prevRecInFile);
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.cdt.core.dom.ast.cpp.ICPPUsingDirective#getNamespace()
+	 */
+	public ICPPNamespaceScope getNominatedScope() {
+		try {
+			int rec = fLinkage.getPDOM().getDB().getInt(fRecord + NOMINATED_NAMESPACE);
+			PDOMNode node= fLinkage.getNode(rec);
+			if (node instanceof ICPPNamespace) {
+				return ((ICPPNamespace) node).getNamespaceScope();
+			}
+		} catch (CoreException e) {
+			CCorePlugin.log(e);
+		} catch (DOMException e) {
+		}
+		return null;
+	}
+
+	
+	/* (non-Javadoc)
+	 * @see org.eclipse.cdt.core.dom.ast.cpp.ICPPUsingDirective#getContainingScope()
+	 */
+	public IScope getContainingScope() {
+		try {
+			int rec = fLinkage.getPDOM().getDB().getInt(fRecord + CONTAINER_NAMESPACE);
+			if (rec != 0) {
+				PDOMNode node= fLinkage.getNode(rec);
+				if (node instanceof PDOMCPPNamespace) {
+					return (PDOMCPPNamespace) node;
+				}
+			}
+		} catch (CoreException e) {
+			CCorePlugin.log(e);
+		}
+		return null;
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.cdt.core.dom.ast.cpp.ICPPUsingDirective#getPointOfDeclaration()
+	 */
+	public int getPointOfDeclaration() {
+		return 0;
+	}
+
+	public int getRecord() {
+		return fRecord;
+	}
+
+	public int getPreviousRec() throws CoreException {
+		final Database db= fLinkage.getPDOM().getDB();
+		return db.getInt(fRecord + PREV_DIRECTIVE_OF_FILE);
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.cdt.core.dom.IPDOMNode#accept(org.eclipse.cdt.core.dom.IPDOMVisitor)
+	 */
+	public void accept(IPDOMVisitor visitor) throws CoreException {
+	}
+
+	public void delete(PDOMLinkage linkage) throws CoreException {
+		fLinkage.getPDOM().getDB().free(fRecord);
+	}
+}