1 files changed, 70 insertions, 0 deletions
diff --git a/cpp/src/qpid/BufferRef.h b/cpp/src/qpid/BufferRef.h
new file mode 100644
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+++ b/cpp/src/qpid/BufferRef.h
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+#ifndef QPID_BUFFERREF_H
+#define QPID_BUFFERREF_H
+
+/*
+ *
+ * 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.
+ *
+ */
+
+#include "qpid/RefCounted.h"
+#include <boost/intrusive_ptr.hpp>
+
+namespace qpid {
+
+/** Template for mutable or const buffer references */
+template <class T> class BufferRefT {
+  public:
+    BufferRefT() : begin_(0), end_(0) {}
+
+    BufferRefT(boost::intrusive_ptr<RefCounted> c, T* begin, T* end) :
+        counter(c), begin_(begin), end_(end) {}
+
+    template <class U> BufferRefT(const BufferRefT<U>& other) :
+        counter(other.counter), begin_(other.begin_), end_(other.end_) {}
+
+    T* begin() const { return begin_; }
+    T* end() const { return end_; }
+
+    /** Return a sub-buffer of the current buffer */
+    BufferRefT sub_buffer(T* begin, T* end) {
+        assert(begin_ <= begin && begin <= end_);
+        assert(begin_ <= end && end <= end_);
+        assert(begin <= end);
+        return BufferRefT(counter, begin, end);
+    }
+
+  private:
+    boost::intrusive_ptr<RefCounted> counter;
+    T* begin_;
+    T* end_;
+};
+
+/**
+ * Reference to a mutable ref-counted buffer.
+ */
+typedef BufferRefT<char> BufferRef;
+
+/**
+ * Reference to a const ref-counted buffer.
+ */
+typedef BufferRefT<const char> ConstBufferRef;
+
+} // namespace qpid
+
+#endif  /*!QPID_BUFFERREF_H*/