1 files changed, 102 insertions, 0 deletions
diff --git a/src/org/apache/http/message/ParserCursor.java b/src/org/apache/http/message/ParserCursor.java
new file mode 100644
index 0000000..d030675
--- /dev/null
+++ b/src/org/apache/http/message/ParserCursor.java
@@ -0,0 +1,102 @@
+/*
+ * $HeadURL:https://svn.apache.org/repos/asf/jakarta/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/message/ParserCursor.java $
+ * $Revision:589325 $
+ * $Date:2007-10-28 11:37:56 +0100 (Sun, 28 Oct 2007) $
+ *
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+
+package org.apache.http.message;
+
+import org.apache.http.util.CharArrayBuffer;
+
+/**
+ * This class represents a context of a parsing operation: 
+ * <ul>
+ *  <li>the current position the parsing operation is expected to start at</li>
+ *  <li>the bounds limiting the scope of the parsing operation</li>
+ * </ul>
+ * 
+ * @author <a href="mailto:oleg at ural.com">Oleg Kalnichevski</a>
+ */
+public class ParserCursor {
+
+    private final int lowerBound;
+    private final int upperBound;
+    private int pos;
+    
+    public ParserCursor(int lowerBound, int upperBound) {
+        super();
+        if (lowerBound < 0) {
+            throw new IndexOutOfBoundsException("Lower bound cannot be negative");
+        }
+        if (lowerBound > upperBound) {
+            throw new IndexOutOfBoundsException("Lower bound cannot be greater then upper bound");
+        }
+        this.lowerBound = lowerBound;
+        this.upperBound = upperBound;
+        this.pos = lowerBound;
+    }
+
+    public int getLowerBound() {
+        return this.lowerBound;
+    }
+
+    public int getUpperBound() {
+        return this.upperBound;
+    }
+
+    public int getPos() {
+        return this.pos;
+    }
+
+    public void updatePos(int pos) {
+        if (pos < this.lowerBound) {
+            throw new IndexOutOfBoundsException();
+        }
+        if (pos > this.upperBound) {
+            throw new IndexOutOfBoundsException();
+        }
+        this.pos = pos;
+    }
+    
+    public boolean atEnd() {
+        return this.pos >= this.upperBound;
+    }
+
+    public String toString() {
+        CharArrayBuffer buffer = new CharArrayBuffer(16);
+        buffer.append('[');
+        buffer.append(Integer.toString(this.lowerBound));
+        buffer.append('>');
+        buffer.append(Integer.toString(this.pos));
+        buffer.append('>');
+        buffer.append(Integer.toString(this.upperBound));
+        buffer.append(']');
+        return buffer.toString();
+    }
+    
+}