/usr/share/cruisecontrol-bin-2.6.1/projects/qpid-trunk/cpp/src/qpid/framing/Buffer.h

00001 /*
00002  *
00003  * Licensed to the Apache Software Foundation (ASF) under one
00004  * or more contributor license agreements.  See the NOTICE file
00005  * distributed with this work for additional information
00006  * regarding copyright ownership.  The ASF licenses this file
00007  * to you under the Apache License, Version 2.0 (the
00008  * "License"); you may not use this file except in compliance
00009  * with the License.  You may obtain a copy of the License at
00010  * 
00011  *   http://www.apache.org/licenses/LICENSE-2.0
00012  * 
00013  * Unless required by applicable law or agreed to in writing,
00014  * software distributed under the License is distributed on an
00015  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
00016  * KIND, either express or implied.  See the License for the
00017  * specific language governing permissions and limitations
00018  * under the License.
00019  *
00020  */
00021 #include "amqp_types.h"
00022 #include "qpid/Exception.h"
00023 #include <boost/iterator/iterator_facade.hpp>
00024 
00025 #ifndef _Buffer_
00026 #define _Buffer_
00027 
00028 namespace qpid {
00029 namespace framing {
00030 
00031 struct OutOfBounds : qpid::Exception {};
00032 
00033 class Content;
00034 class FieldTable;
00035 
00036 class Buffer
00037 {
00038     uint32_t size;
00039     char* data;
00040     uint32_t position;
00041     uint32_t r_position;
00042 
00043     void checkAvailable(uint32_t count) { if (position + count > size) throw OutOfBounds(); }
00044 
00045   public:
00046     
00050     class Iterator  : public boost::iterator_facade<
00051       Iterator, char, boost::random_access_traversal_tag>
00052     {
00053       public:
00054         Iterator(Buffer& b) : buffer(&b) {}
00055 
00056       private:
00057       friend class boost::iterator_core_access;
00058         char& dereference() const { return buffer->data[buffer->position]; }
00059         void increment() { ++buffer->position; }
00060         bool equal(const Iterator& x) const { return buffer == x.buffer; }
00061 
00062         Buffer* buffer;
00063     };
00064     
00065   friend class Iterator;
00066     
00067     Buffer(char* data=0, uint32_t size=0);
00068 
00069     void record();
00070     void restore(bool reRecord = false);
00071     void reset();
00072 
00073     uint32_t available() { return size - position; }
00074     uint32_t getSize() { return size; }
00075     uint32_t getPosition() { return position; }
00076     Iterator getIterator() { return Iterator(*this); }
00077         
00078     void putOctet(uint8_t i);
00079     void putShort(uint16_t i);
00080     void putLong(uint32_t i);
00081     void putLongLong(uint64_t i);
00082     void putFloat(float f);
00083     void putDouble(double f);
00084     void putBin128(uint8_t* b);
00085 
00086     uint8_t  getOctet();
00087     uint16_t getShort(); 
00088     uint32_t getLong();
00089     uint64_t getLongLong();
00090     float    getFloat();
00091     double   getDouble();
00092     
00093     template <int n>
00094     uint64_t getUInt();
00095 
00096     template <int n>
00097     void putUInt(uint64_t);
00098 
00099     void putShortString(const string& s);
00100     void putMediumString(const string& s);
00101     void putLongString(const string& s);
00102     void getShortString(string& s);
00103     void getMediumString(string& s);
00104     void getLongString(string& s);
00105     void getBin128(uint8_t* b);
00106 
00107     void putRawData(const string& s);
00108     void getRawData(string& s, uint32_t size);
00109 
00110     void putRawData(const uint8_t* data, size_t size);
00111     void getRawData(uint8_t* data, size_t size);
00112 
00113     template <class T> void put(const T& data) { data.encode(*this); }
00114     template <class T> void get(T& data) { data.decode(*this); }
00115 
00116     void dump(std::ostream&) const;
00117 };
00118 
00119 std::ostream& operator<<(std::ostream&, const Buffer&);
00120 
00121 }} // namespace qpid::framing
00122 
00123 
00124 #endif

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