PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // FdPStreamBuf.cc 00004 // 00005 // Copyright (C) 2004 Pascal Vincent 00006 // 00007 // Redistribution and use in source and binary forms, with or without 00008 // modification, are permitted provided that the following conditions are met: 00009 // 00010 // 1. Redistributions of source code must retain the above copyright 00011 // notice, this list of conditions and the following disclaimer. 00012 // 00013 // 2. Redistributions in binary form must reproduce the above copyright 00014 // notice, this list of conditions and the following disclaimer in the 00015 // documentation and/or other materials provided with the distribution. 00016 // 00017 // 3. The name of the authors may not be used to endorse or promote 00018 // products derived from this software without specific prior written 00019 // permission. 00020 // 00021 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 00022 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 00023 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 00024 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00025 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 00026 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 00027 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00028 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00029 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00030 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00031 // 00032 // This file is part of the PLearn library. For more information on the PLearn 00033 // library, go to the PLearn Web site at www.plearn.org 00034 00035 /* ******************************************************* 00036 * $Id: FdPStreamBuf.cc 6066 2006-07-17 20:35:56Z tihocan $ 00037 ******************************************************* */ 00038 00039 // Authors: Pascal Vincent 00040 00043 #include "FdPStreamBuf.h" 00044 00045 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(_MINGW_) 00046 // Dummy implementation to prevent compilation and link errors, as the "normal" 00047 // code does not compiler under Windows. 00048 00049 namespace PLearn { 00050 00051 FdPStreamBuf::FdPStreamBuf(int in_fd, int out_fd, 00052 bool own_in_, bool own_out_): 00053 PStreamBuf(true, false) 00054 { 00055 PLERROR("The FdPStreamBuf class cannot be used on this system"); 00056 } 00057 00058 FdPStreamBuf::~FdPStreamBuf() {} 00059 00060 FdPStreamBuf::streamsize FdPStreamBuf::read_(char* p, streamsize n) 00061 { 00062 return 0; 00063 } 00064 00065 void FdPStreamBuf::write_(const char* p, streamsize n) {} 00066 00067 } 00068 00069 #else // POSIX 00070 00071 #include <unistd.h> 00072 00073 namespace PLearn { 00074 using namespace std; 00075 00076 FdPStreamBuf::FdPStreamBuf(int in_fd, int out_fd, 00077 bool own_in_, bool own_out_) 00078 :PStreamBuf(in_fd>=0, out_fd>=0, 4096, 4096, default_ungetsize), 00079 in(in_fd), out(out_fd), own_in(own_in_), own_out(own_out_) 00080 {} 00081 00082 FdPStreamBuf::~FdPStreamBuf() 00083 { 00084 const bool in_and_out_equal = (in == out); 00085 00086 flush(); 00087 if(in>=0 && own_in) 00088 { 00089 ::close(in); 00090 in = -1; 00091 } 00092 if(out>=0 && own_out) 00093 { 00094 if (!in_and_out_equal) 00095 ::close(out); 00096 out = -1; 00097 } 00098 } 00099 00100 FdPStreamBuf::streamsize FdPStreamBuf::read_(char* p, streamsize n) 00101 { 00102 return ::read(in, p, n); 00103 } 00104 00106 void FdPStreamBuf::write_(const char* p, streamsize n) 00107 { 00108 streamsize nwritten = ::write(out, p, n); 00109 if(nwritten!=n) 00110 PLERROR("In FdPStreamBuf::write_ failed to write the requested number of bytes"); 00111 #ifdef _MINGW_ 00112 PLERROR("In FdPStreamBuf::write_ - The 'fsync' function is not defined " 00113 "under MinGW (see code)"); 00114 #else 00115 fsync(out); 00116 #endif 00117 } 00118 00119 } // end of namespace PLearn 00120 00121 #endif // WIN32 vs POSIX 00122 00123 00124 /* 00125 Local Variables: 00126 mode:c++ 00127 c-basic-offset:4 00128 c-file-style:"stroustrup" 00129 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00130 indent-tabs-mode:nil 00131 fill-column:79 00132 End: 00133 */ 00134 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :