1 files changed, 87 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/amqp_0_10/UnknownType.h b/qpid/cpp/src/qpid/amqp_0_10/UnknownType.h
new file mode 100644
index 0000000000..77498871b3
--- /dev/null
+++ b/qpid/cpp/src/qpid/amqp_0_10/UnknownType.h
@@ -0,0 +1,87 @@
+#ifndef QPID_AMQP_0_10_UNKNOWNTYPE_H
+#define QPID_AMQP_0_10_UNKNOWNTYPE_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/sys/IntegerTypes.h"
+#include <vector>
+#include <iosfwd>
+
+namespace qpid {
+namespace amqp_0_10 {
+
+/** Encode/decode an unknown type based on typecode. */
+class UnknownType {
+  public:
+    UnknownType(uint8_t code=0);
+    uint8_t getCode() const { return code; }
+    /** Size of fixed type or 0 if not fixed/0-length. -1 invalid */
+    int fixed() const;
+    /** Bytes in size type for variable width. -1 invalid */
+    int variable() const;
+
+    typedef std::vector<char>::const_iterator const_iterator;
+    const_iterator begin() const { return data.begin(); }
+    const_iterator end() const { return data.end(); }
+    size_t size() const { return data.size(); }
+
+    template <class S> void serialize(S& s) { s.split(*this); }
+    template <class S> void encode(S& s) const;
+    template <class S> void decode(S& s);
+
+  private:
+    uint8_t code;
+    struct Width { int fixed; int variable; };
+    static Width WidthTable[16];
+
+    std::vector<char> data;
+};
+
+template <class S> void UnknownType::encode(S& s) const {
+    switch (variable()) {
+      case 0: break;
+      case 1: s(uint8_t(data.size())); break;
+      case 2: s(uint16_t(data.size())); break;
+      case 4: s(uint32_t(data.size())); break;
+    }
+    s(data.begin(), data.end());
+}
+
+template <class S> void UnknownType::decode(S& s) {
+    uint32_t s8;
+    uint32_t s16;
+    uint32_t s32;
+    switch (variable()) {
+      case 0: break;
+      case 1: s(s8); data.resize(s8); break;
+      case 2: s(s16); data.resize(s16); break;
+      case 4: s(s32); data.resize(s32); break;
+    }
+    s(data.begin(), data.end());
+}
+
+inline uint8_t codeFor(const UnknownType& u) { return u.getCode(); }
+
+std::ostream& operator<<(std::ostream&, const UnknownType&);
+
+}} // namespace qpid::amqp_0_10
+
+#endif  /*!QPID_AMQP_0_10_UNKNOWNTYPE_H*/