PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // openFile.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: openFile.cc 9520 2008-10-03 18:50:46Z nouiz $ 00037 ******************************************************* */ 00038 00039 // Authors: Pascal Vincent, Christian Hudon 00040 00044 #include "openFile.h" 00045 #include <nspr/prio.h> 00046 #include <plearn/io/fileutils.h> 00047 #include <plearn/io/PrPStreamBuf.h> 00048 00049 namespace PLearn { 00050 using namespace std; 00051 00075 PStream openFile(const PPath& filepath_, PStream::mode_t io_formatting, 00076 const string& openmode, bool err_if_dont_exist, bool make_dirs) 00077 { 00078 const PPath filepath = filepath_.absolute(); 00079 00080 if(make_dirs) 00081 force_mkdir(filepath.dirname()); 00082 00083 PStream st; 00084 PRFileDesc* fd; 00085 if ((openmode == "r" || openmode == "a") && isdir(filepath)) 00086 PLERROR("In openFile(..) - Cannot open this directory for reading or " 00087 "append (%s), it should be a file!", filepath.c_str()); 00088 00089 if (openmode == "r") 00090 { 00091 fd = PR_Open(filepath.c_str(), PR_RDONLY, 0666); 00092 if (!fd && err_if_dont_exist) 00093 PLERROR("openFile(\"%s\",\"%s\") failed.",filepath.c_str(), openmode.c_str()); 00094 else if(!fd) 00095 return new PrPStreamBuf(0, 0); 00096 st = new PrPStreamBuf(fd, 0, true, false); 00097 } 00098 else if (openmode == "w") 00099 { 00100 fd = PR_Open(filepath.c_str(), PR_WRONLY | PR_CREATE_FILE | PR_TRUNCATE, 0666); 00101 if (!fd) 00102 PLERROR("openFile(\"%s\",\"%s\") failed.",filepath.c_str(), openmode.c_str()); 00103 st = new PrPStreamBuf(0, fd, false, true); 00104 } 00105 else if (openmode == "a") 00106 { 00107 fd = PR_Open(filepath.c_str(), PR_WRONLY | PR_CREATE_FILE | PR_APPEND, 0666); 00108 if (!fd) 00109 PLERROR("openFile(\"%s\",\"%s\") failed.",filepath.c_str(), openmode.c_str()); 00110 st = new PrPStreamBuf(0, fd, false, true); 00111 } 00112 else 00113 PLERROR("In openFile, invalid openmode=\"%s\" ",openmode.c_str()); 00114 00115 st.setMode(io_formatting); 00116 return st; 00117 } 00118 00119 } // end of namespace PLearn 00120 00121 00122 /* 00123 Local Variables: 00124 mode:c++ 00125 c-basic-offset:4 00126 c-file-style:"stroustrup" 00127 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00128 indent-tabs-mode:nil 00129 fill-column:79 00130 End: 00131 */ 00132 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :