blocxx
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00001 /******************************************************************************* 00002 * Copyright (C) 2005, Vintela, Inc. All rights reserved. 00003 * Copyright (C) 2006, Novell, Inc. All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions are met: 00007 * 00008 * * Redistributions of source code must retain the above copyright notice, 00009 * this list of conditions and the following disclaimer. 00010 * * Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * * Neither the name of 00014 * Vintela, Inc., 00015 * nor Novell, Inc., 00016 * nor the names of its contributors or employees may be used to 00017 * endorse or promote products derived from this software without 00018 * specific prior written permission. 00019 * 00020 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 00021 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00022 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00023 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 00024 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 00025 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 00026 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00027 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00028 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 00029 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00030 * POSSIBILITY OF SUCH DAMAGE. 00031 *******************************************************************************/ 00032 00033 00039 #ifndef BLOCXX_BASESTREAMBUFFER_HPP_INCLUDE_GUARD_ 00040 #define BLOCXX_BASESTREAMBUFFER_HPP_INCLUDE_GUARD_ 00041 #include "blocxx/BLOCXX_config.h" 00042 00043 #ifdef BLOCXX_HAVE_STREAMBUF 00044 #include <streambuf> 00045 #else 00046 #include <streambuf.h> 00047 #endif 00048 00049 // The classes and functions defined in this file are not meant for general 00050 // use, they are internal implementation details. They may change at any time. 00051 00052 namespace BLOCXX_NAMESPACE 00053 { 00054 00055 const size_t BASE_BUF_SIZE = 256; 00056 const size_t HTTP_BUF_SIZE = 4096; 00057 class BLOCXX_COMMON_API BaseStreamBuffer : public std::streambuf 00058 { 00059 public: 00060 enum EDirectionFlag 00061 { 00062 E_IN, 00063 E_OUT, 00064 E_IN_OUT 00065 }; 00071 BaseStreamBuffer(EDirectionFlag direction, size_t bufSize = BASE_BUF_SIZE); 00072 00073 ~BaseStreamBuffer(); 00074 protected: 00075 // for input 00076 int underflow(); 00077 //int pbackfail(int c); 00078 // for output 00079 std::streamsize xsputn(const char* s, std::streamsize n); 00080 virtual int overflow(int c); 00081 virtual int sync(); 00082 virtual void initBuffers(); 00083 virtual void initGetBuffer(); 00084 virtual void initPutBuffer(); 00085 // meant to be overwritten (at least one of them) 00093 virtual int buffer_to_device(const char* c, int n); 00094 00105 virtual int buffer_from_device(char* c, int n); 00106 private: 00107 std::streamsize m_bufSize; 00108 char* m_inputBuffer; 00109 char* m_outputBuffer; 00110 int buffer_in(); 00111 int buffer_out(); 00112 // prohibit copying and assigning 00113 // NO IMPLEMENTATION 00114 BaseStreamBuffer(const BaseStreamBuffer& arg); 00115 BaseStreamBuffer& operator=(const BaseStreamBuffer& arg); 00116 }; 00117 00118 } // end namespace BLOCXX_NAMESPACE 00119 00120 #endif