PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // PLearn (A C++ Machine Learning Library) 00004 // Copyright (C) 1998 Pascal Vincent 00005 // Copyright (C) 1999-2001 Pascal Vincent, Yoshua Bengio, Rejean Ducharme and University of Montreal 00006 // Copyright (C) 2002 Pascal Vincent, Julien Keable, Xavier Saint-Mleux 00007 // Copyright (C) 2008 Xavier Saint-Mleux, ApSTAT Technologies inc. 00008 // 00009 // Redistribution and use in source and binary forms, with or without 00010 // modification, are permitted provided that the following conditions are met: 00011 // 00012 // 1. Redistributions of source code must retain the above copyright 00013 // notice, this list of conditions and the following disclaimer. 00014 // 00015 // 2. Redistributions in binary form must reproduce the above copyright 00016 // notice, this list of conditions and the following disclaimer in the 00017 // documentation and/or other materials provided with the distribution. 00018 // 00019 // 3. The name of the authors may not be used to endorse or promote 00020 // products derived from this software without specific prior written 00021 // permission. 00022 // 00023 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 00024 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 00025 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 00026 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00027 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 00028 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 00029 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00030 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00031 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00032 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00033 // 00034 // This file is part of the PLearn library. For more information on the PLearn 00035 // library, go to the PLearn Web site at www.plearn.org 00036 00037 00038 /* ******************************************************* 00039 * $Id: DiskVMatrix.h 10003 2009-03-10 17:06:50Z tihocan $ 00040 ******************************************************* */ 00041 00042 00045 #ifndef DiskVMatrix_INC 00046 #define DiskVMatrix_INC 00047 00048 #include "RowBufferedVMatrix.h" 00049 #include <cstdio> 00050 00051 namespace PLearn { 00052 using namespace std; 00053 00054 00057 class DiskVMatrix: public RowBufferedVMatrix 00058 { 00059 typedef RowBufferedVMatrix inherited; 00060 00061 protected: 00062 mutable FILE* indexf; 00063 mutable TVec<FILE*> dataf; 00064 bool freshnewfile; 00065 bool old_format; // is thisfile in the old deprecated format? 00066 bool swap_endians; // was this file written in the opposite endian order 00067 mutable bool last_op_was_append; //<! true if the last I/O operation performed was an append; if so, we don't need to seek to the end of file before writing again. 00068 public: 00069 static const int NO_LENGTH_SENTINEL= -42; // written in header instead of actual length 00070 static const int HEADER_OFFSET_LENGTH= 4; // offset to length in header 00071 00072 // Build options 00073 PPath dirname; 00074 //bool readwritemode; 00075 double tolerance; // the error tolerance for storing doubles as floats 00076 00077 DiskVMatrix(); 00078 00084 DiskVMatrix(const PPath& the_dirname, bool readwrite=false, 00085 bool call_build_ = true); 00086 00094 DiskVMatrix(const PPath& the_dirname, int the_width, bool write_double_as_float=false); 00095 00096 virtual void putRow(int i, Vec v); 00097 virtual void appendRow(Vec v); 00098 virtual void flush(); 00099 00100 virtual void build(); 00101 00103 virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies); 00104 00105 protected: 00106 00107 virtual void getNewRow(int i, const Vec& v) const; 00108 static void declareOptions(OptionList & ol); 00109 00112 virtual void closeCurrentFiles(); 00113 00114 public: 00115 00116 PLEARN_DECLARE_OBJECT(DiskVMatrix); 00117 00118 00119 virtual ~DiskVMatrix(); 00120 private: 00121 void build_(); 00122 }; 00123 00124 DECLARE_OBJECT_PTR(DiskVMatrix); 00125 00126 } // end of namespace PLearn 00127 #endif 00128 00129 00130 /* 00131 Local Variables: 00132 mode:c++ 00133 c-basic-offset:4 00134 c-file-style:"stroustrup" 00135 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00136 indent-tabs-mode:nil 00137 fill-column:79 00138 End: 00139 */ 00140 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :