PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // PrPStreamBuf.cc 00004 // 00005 // Copyright (C) 2004 Christian Hudon 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: PrPStreamBuf.cc 9199 2008-07-03 15:00:12Z nouiz $ 00037 ******************************************************* */ 00038 00039 // Authors: Christian Hudon 00040 00044 #include "PrPStreamBuf.h" 00045 #include <plearn/base/PrUtils.h> 00046 #include <nspr/prio.h> 00047 #include <stdio.h> 00048 #include "PStream.h" 00049 00050 namespace PLearn { 00051 using namespace std; 00052 00053 PrPStreamBuf::PrPStreamBuf(PRFileDesc* in_, PRFileDesc* out_, 00054 bool own_in_, bool own_out_) 00055 : PStreamBuf(in_ != 0, out_ != 0, 4096, 4096, default_ungetsize), 00056 in(in_), out(out_), own_in(own_in_), own_out(own_out_) 00057 {} 00058 00059 PrPStreamBuf::~PrPStreamBuf() 00060 { 00061 const bool in_and_out_equal = (in == out); 00062 00063 try { 00064 flush(); 00065 } 00066 catch(...) 00067 { 00068 fprintf(stderr,"Could not properly clean up (flush) in destructor of PrPStreamBuf\n"); 00069 } 00070 if (in && own_in) 00071 { 00072 PR_Close(in); 00073 in = 0; 00074 } 00075 if (out && own_out) 00076 { 00077 // If "in" and "out" were pointing to the same PRFileDesc, 00078 // don't close it a second time. 00079 if (!in_and_out_equal) 00080 PR_Close(out); 00081 out = 0; 00082 } 00083 } 00084 00085 PrPStreamBuf::streamsize PrPStreamBuf::read_(char* p, streamsize n) 00086 { 00087 PRInt32 nr= PR_Read(in, p, PRInt32(n)); 00088 if(nr < 0) 00089 PLERROR((string("in PrPStreamBuf::read_ : no chars read: ") + getPrErrorString()).c_str()); 00090 return nr; 00091 } 00092 00094 void PrPStreamBuf::write_(const char* p, streamsize n) 00095 { 00096 streamsize nwritten = ::PR_Write(out, p, PRInt32(n)); 00097 if (nwritten != n) 00098 PLERROR("In PrPStreamBuf::write_ failed to write the requested number " 00099 "of bytes: wrote %ld instead of %ld",long(nwritten),long(n)); 00100 } 00101 00102 } // end of namespace PLearn 00103 00104 00105 /* 00106 Local Variables: 00107 mode:c++ 00108 c-basic-offset:4 00109 c-file-style:"stroustrup" 00110 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00111 indent-tabs-mode:nil 00112 fill-column:79 00113 End: 00114 */ 00115 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :