Apache Qpid - AMQP Messaging for Java JMS, C++, Python, Ruby, and .NET Apache Qpid Documentation
qpid/framing/Buffer.h
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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 "qpid/framing/amqp_types.h"
00022 #include "qpid/Exception.h"
00023 #include "qpid/CommonImportExport.h"
00024 #include <boost/iterator/iterator_facade.hpp>
00025 
00026 #ifndef _Buffer_
00027 #define _Buffer_
00028 
00029 namespace qpid {
00030 namespace framing {
00031 
00032 struct QPID_COMMON_CLASS_EXTERN OutOfBounds : qpid::Exception {
00033     OutOfBounds() : qpid::Exception(std::string("Out of Bounds")) {}
00034 };
00035 
00036 class Content;
00037 class FieldTable;
00038 
00039 class QPID_COMMON_CLASS_EXTERN Buffer
00040 {
00041     uint32_t size;
00042     char* data;
00043     uint32_t position;
00044     uint32_t r_position;
00045 
00046   public:
00047     void checkAvailable(uint32_t count) { if (position + count > size) throw OutOfBounds(); }
00048 
00052     class Iterator  : public boost::iterator_facade<
00053       Iterator, char, boost::random_access_traversal_tag>
00054     {
00055       public:
00056         Iterator(Buffer& b) : buffer(&b) {}
00057 
00058       private:
00059       friend class boost::iterator_core_access;
00060         char& dereference() const { return buffer->data[buffer->position]; }
00061         void increment() { ++buffer->position; }
00062         bool equal(const Iterator& x) const { return buffer == x.buffer; }
00063 
00064         Buffer* buffer;
00065     };
00066 
00067   friend class Iterator;
00068 
00069     QPID_COMMON_EXTERN Buffer(char* data=0, uint32_t size=0);
00070 
00071     QPID_COMMON_EXTERN void record();
00072     QPID_COMMON_EXTERN void restore(bool reRecord = false);
00073     QPID_COMMON_EXTERN void reset();
00074 
00075     QPID_COMMON_INLINE_EXTERN uint32_t available() { return size - position; }
00076     QPID_COMMON_INLINE_EXTERN uint32_t getSize() { return size; }
00077     QPID_COMMON_INLINE_EXTERN uint32_t getPosition() { return position; }
00078     QPID_COMMON_INLINE_EXTERN void setPosition(uint32_t p) { position = p; }
00079     QPID_COMMON_INLINE_EXTERN Iterator getIterator() { return Iterator(*this); }
00080     QPID_COMMON_INLINE_EXTERN char* getPointer() { return data; }
00081 
00082     QPID_COMMON_EXTERN void putOctet(uint8_t i);
00083     QPID_COMMON_EXTERN void putShort(uint16_t i);
00084     QPID_COMMON_EXTERN void putLong(uint32_t i);
00085     QPID_COMMON_EXTERN void putLongLong(uint64_t i);
00086     QPID_COMMON_EXTERN void putInt8(int8_t i);
00087     QPID_COMMON_EXTERN void putInt16(int16_t i);
00088     QPID_COMMON_EXTERN void putInt32(int32_t i);
00089     QPID_COMMON_EXTERN void putInt64(int64_t i);
00090     QPID_COMMON_EXTERN void putFloat(float f);
00091     QPID_COMMON_EXTERN void putDouble(double f);
00092     QPID_COMMON_EXTERN void putBin128(const uint8_t* b);
00093 
00094     QPID_COMMON_EXTERN uint8_t  getOctet();
00095     QPID_COMMON_EXTERN uint16_t getShort();
00096     QPID_COMMON_EXTERN uint32_t getLong();
00097     QPID_COMMON_EXTERN uint64_t getLongLong();
00098     QPID_COMMON_EXTERN int8_t   getInt8();
00099     QPID_COMMON_EXTERN int16_t  getInt16();
00100     QPID_COMMON_EXTERN int32_t  getInt32();
00101     QPID_COMMON_EXTERN int64_t  getInt64();
00102     QPID_COMMON_EXTERN float    getFloat();
00103     QPID_COMMON_EXTERN double   getDouble();
00104 
00105     template <int n>
00106     QPID_COMMON_EXTERN uint64_t getUInt();
00107 
00108     template <int n>
00109     QPID_COMMON_EXTERN void putUInt(uint64_t);
00110 
00111     QPID_COMMON_EXTERN void putShortString(const string& s);
00112     QPID_COMMON_EXTERN void putMediumString(const string& s);
00113     QPID_COMMON_EXTERN void putLongString(const string& s);
00114     QPID_COMMON_EXTERN void getShortString(string& s);
00115     QPID_COMMON_EXTERN void getMediumString(string& s);
00116     QPID_COMMON_EXTERN void getLongString(string& s);
00117     QPID_COMMON_EXTERN void getBin128(uint8_t* b);
00118 
00119     QPID_COMMON_EXTERN void putRawData(const string& s);
00120     QPID_COMMON_EXTERN void getRawData(string& s, uint32_t size);
00121 
00122     QPID_COMMON_EXTERN void putRawData(const uint8_t* data, size_t size);
00123     QPID_COMMON_EXTERN void getRawData(uint8_t* data, size_t size);
00124 
00125     template <class T> void put(const T& data) { data.encode(*this); }
00126     template <class T> void get(T& data) { data.decode(*this); }
00127 
00128     QPID_COMMON_EXTERN void dump(std::ostream&) const;
00129 };
00130 
00131 std::ostream& operator<<(std::ostream&, const Buffer&);
00132 
00133 }} // namespace qpid::framing
00134 
00135 
00136 #endif

Qpid C++ API Reference
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