PLearn 0.1
FilePStreamBuf.cc
Go to the documentation of this file.
00001 // -*- C++ -*-
00002 
00003 // FilePStreamBuf.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: FilePStreamBuf.cc 3994 2005-08-25 13:35:03Z chapados $ 
00037  ******************************************************* */
00038 
00039 // Authors: Pascal Vincent
00040 
00044 #include "FilePStreamBuf.h"
00045 
00046 namespace PLearn {
00047 using namespace std;
00048 
00049 FilePStreamBuf::FilePStreamBuf(FILE* in_f, FILE* out_f, 
00050                                bool own_in_, bool own_out_)
00051     :PStreamBuf(in_f!=0, out_f!=0, 4096, 4096, default_ungetsize), 
00052      in(in_f), out(out_f), own_in(own_in_), own_out(own_out_)
00053 {}
00054 
00055 FilePStreamBuf::~FilePStreamBuf()
00056 {
00057     const bool in_and_out_equal = (in == out);
00058 
00059     flush();
00060     if(in && own_in)
00061     {
00062         fclose(in);
00063         in = 0;
00064     }
00065     if(out && own_out)
00066     {
00067         if (!in_and_out_equal)
00068             fclose(out);
00069         out = 0;
00070     }        
00071 }
00072 
00073 FilePStreamBuf::streamsize FilePStreamBuf::read_(char* p, streamsize n)
00074 {
00075     return fread(p, 1, n, in);
00076 }
00077 
00079 void FilePStreamBuf::write_(const char* p, streamsize n)
00080 {
00081     streamsize nwritten = fwrite(p, 1, n, out);
00082     if(nwritten!=n)
00083         PLERROR("In FilePStreamBuf::write_ failed to write the requested number of bytes");
00084     fflush(out);
00085 }
00086   
00087 } // end of namespace PLearn
00088 
00089 
00090 /*
00091   Local Variables:
00092   mode:c++
00093   c-basic-offset:4
00094   c-file-style:"stroustrup"
00095   c-file-offsets:((innamespace . 0)(inline-open . 0))
00096   indent-tabs-mode:nil
00097   fill-column:79
00098   End:
00099 */
00100 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Defines