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 #include "blocxx/BLOCXX_config.h" 00040 #include "blocxx/BaseStreamBuffer.hpp" 00041 #include "blocxx/Exception.hpp" 00042 #include "blocxx/String.hpp" 00043 #include "blocxx/Assertion.hpp" 00044 #include <iostream> // for cerr 00045 #include <cstring> // for memcpy 00046 00047 namespace BLOCXX_NAMESPACE 00048 { 00049 00051 BaseStreamBuffer::BaseStreamBuffer(EDirectionFlag direction, size_t bufSize) 00052 : m_bufSize(bufSize), m_inputBuffer(NULL), m_outputBuffer(NULL) 00053 { 00054 if (direction == E_IN || direction == E_IN_OUT) 00055 { 00056 m_inputBuffer = new char[m_bufSize]; 00057 initGetBuffer(); 00058 } 00059 if (direction == E_OUT || direction == E_IN_OUT) 00060 { 00061 m_outputBuffer = new char[m_bufSize]; 00062 initPutBuffer(); 00063 } 00064 } 00066 void 00067 BaseStreamBuffer::initBuffers() 00068 { 00069 initPutBuffer(); 00070 initGetBuffer(); 00071 } 00073 void 00074 BaseStreamBuffer::initPutBuffer() 00075 { 00076 setp(m_outputBuffer, m_outputBuffer + m_bufSize); 00077 } 00079 void 00080 BaseStreamBuffer::initGetBuffer() 00081 { 00082 setg(m_inputBuffer, m_inputBuffer, m_inputBuffer); 00083 } 00085 BaseStreamBuffer::~BaseStreamBuffer() 00086 { 00087 delete [] m_inputBuffer; 00088 delete [] m_outputBuffer; 00089 } 00091 int 00092 BaseStreamBuffer::sync() 00093 { 00094 return buffer_out(); 00095 } 00097 int 00098 BaseStreamBuffer::buffer_out() 00099 { 00100 int cnt = pptr() - pbase(); 00101 int retval = buffer_to_device(m_outputBuffer, cnt); 00102 pbump(-cnt); 00103 return retval; 00104 } 00106 int 00107 BaseStreamBuffer::overflow(int c) 00108 { 00109 if (buffer_out() < 0) 00110 { 00111 return EOF; 00112 } 00113 else 00114 { 00115 if (c != EOF) 00116 { 00117 return sputc(c); 00118 } 00119 else 00120 { 00121 return c; 00122 } 00123 } 00124 } 00126 std::streamsize 00127 BaseStreamBuffer::xsputn(const char* s, std::streamsize n) 00128 { 00129 if (n < epptr() - pptr()) 00130 { 00131 memcpy(pptr(), s, n * sizeof(char)); 00132 pbump(n); 00133 return n; 00134 } 00135 else 00136 { 00137 for (std::streamsize i = 0; i < n; i++) 00138 { 00139 if (sputc(s[i]) == EOF) 00140 { 00141 return i; 00142 } 00143 } 00144 return n; 00145 } 00146 } 00148 int 00149 BaseStreamBuffer::underflow() 00150 { 00151 if (gptr() < egptr()) 00152 { 00153 return static_cast<unsigned char>(*gptr()); // need a static_cast so a -1 doesn't turn into an EOF 00154 } 00155 if (buffer_in() < 0) 00156 { 00157 return EOF; 00158 } 00159 else 00160 { 00161 return static_cast<unsigned char>(*gptr()); // need a static_cast so a -1 doesn't turn into an EOF 00162 } 00163 } 00165 int 00166 BaseStreamBuffer::buffer_in() 00167 { 00168 int retval = buffer_from_device(m_inputBuffer, 00169 m_bufSize); 00170 if (retval <= 0) 00171 { 00172 setg(0,0,0); 00173 return -1; 00174 } 00175 else 00176 { 00177 setg(m_inputBuffer, m_inputBuffer, m_inputBuffer + retval); 00178 return retval; 00179 } 00180 } 00182 int 00183 BaseStreamBuffer::buffer_to_device(const char* c, int n) 00184 { 00185 BLOCXX_ASSERT("Not implemented, should overwrite" == 0); 00186 return -1; // make the compiler happy 00187 } 00189 int 00190 BaseStreamBuffer::buffer_from_device(char* c, int n) 00191 { 00192 BLOCXX_ASSERT("Not implemented, should overwrite" == 0); 00193 return -1; // make the compiler happy 00194 } 00195 00196 } // end namespace BLOCXX_NAMESPACE 00197