1 files changed, 89 insertions, 0 deletions
diff --git a/bundles/org.eclipse.team.core/src/org/eclipse/team/internal/core/subscribers/ContentComparator.java b/bundles/org.eclipse.team.core/src/org/eclipse/team/internal/core/subscribers/ContentComparator.java
new file mode 100644
index 000000000..fb0337dd1
--- /dev/null
+++ b/bundles/org.eclipse.team.core/src/org/eclipse/team/internal/core/subscribers/ContentComparator.java
@@ -0,0 +1,89 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2017 IBM Corporation 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:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.team.internal.core.subscribers;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+import org.eclipse.core.runtime.IProgressMonitor;
+
+/**
+ * This is an internal class that is used by the
+ * {@link org.eclipse.team.core.synchronize.SyncInfoFilter.ContentComparisonSyncInfoFilter}
+ * and {@link ContentComparisonDiffFilter} to compare the contents of the local
+ * and remote resources.
+ */
+public class ContentComparator extends AbstractContentComparator{
+
+	public ContentComparator(boolean ignoreWhitespace) {
+		super(ignoreWhitespace);
+	}
+
+	/**
+	 * Returns <code>true</code> if both input streams byte contents is
+	 * identical.
+	 *
+	 * @param is1
+	 *                   first input to contents compare
+	 * @param is2
+	 *                   second input to contents compare
+	 * @return <code>true</code> if content is equal
+	 */
+	@Override
+	protected boolean contentsEqual(IProgressMonitor monitor, InputStream is1,
+			InputStream is2, boolean ignoreWhitespace) {
+		try {
+			if (is1 == is2)
+				return true;
+			// no byte contents
+			if (is1 == null && is2 == null)
+				return true;
+			// only one has contents
+			if (is1 == null || is2 == null)
+				return false;
+
+			while (true) {
+				int c1 = is1.read();
+				while (shouldIgnoreWhitespace() && isWhitespace(c1))
+					c1 = is1.read();
+				int c2 = is2.read();
+				while (shouldIgnoreWhitespace() && isWhitespace(c2))
+					c2 = is2.read();
+				if (c1 == -1 && c2 == -1)
+					return true;
+				if (c1 != c2)
+					break;
+			}
+		} catch (IOException ex) {
+		} finally {
+			try {
+				try {
+					if (is1 != null) {
+						is1.close();
+					}
+				} finally {
+					if (is2 != null) {
+						is2.close();
+					}
+				}
+			} catch (IOException e) {
+				// Ignore
+			}
+		}
+		return false;
+	}
+
+	private boolean isWhitespace(int c) {
+		if (c == -1)
+			return false;
+		return Character.isWhitespace((char) c);
+	}
+}