PLearn 0.1
CompressedVMatrix.h
Go to the documentation of this file.
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 //
00008 // Redistribution and use in source and binary forms, with or without
00009 // modification, are permitted provided that the following conditions are met:
00010 //
00011 //  1. Redistributions of source code must retain the above copyright
00012 //     notice, this list of conditions and the following disclaimer.
00013 //
00014 //  2. Redistributions in binary form must reproduce the above copyright
00015 //     notice, this list of conditions and the following disclaimer in the
00016 //     documentation and/or other materials provided with the distribution.
00017 //
00018 //  3. The name of the authors may not be used to endorse or promote
00019 //     products derived from this software without specific prior written
00020 //     permission.
00021 //
00022 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
00023 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00024 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
00025 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00026 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00027 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00028 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00029 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00030 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00031 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00032 //
00033 // This file is part of the PLearn library. For more information on the PLearn
00034 // library, go to the PLearn Web site at www.plearn.org
00035 
00036 
00037 /* *******************************************************
00038  * $Id: CompressedVMatrix.h 8239 2007-11-09 15:35:34Z nouiz $
00039  ******************************************************* */
00040 
00041 
00044 #ifndef CompressedVMatrix_INC
00045 #define CompressedVMatrix_INC
00046 
00047 #include "RowBufferedVMatrix.h"
00048 #include "VMat.h"
00049 
00050 namespace PLearn {
00051 using namespace std;
00052 
00063 class CompressedVMatrix: public RowBufferedVMatrix
00064 {
00065     typedef RowBufferedVMatrix inherited;
00066 
00067 protected:
00068     int max_length; 
00069 
00070     signed char* data;
00071     signed char** rowstarts;
00072     signed char* dataend; 
00073 
00075     signed char* curpos;
00076 
00081     void init(int the_max_length, int the_width, size_t memory_alloc);
00082 
00083 public:
00084     // ******************
00085     // *  Constructors  *
00086     // ******************
00087     CompressedVMatrix(); 
00088 
00093     CompressedVMatrix(int the_max_length, int the_width, size_t memory_alloc=0);
00094 
00099     CompressedVMatrix(VMat v, size_t memory_alloc=0);
00100 
00101     PLEARN_DECLARE_OBJECT(CompressedVMatrix);
00102 
00103 protected:
00104 
00105     virtual void getNewRow(int i, const Vec& v) const;
00106 
00107 public :
00108 
00109     virtual ~CompressedVMatrix();
00110     virtual void appendRow(Vec v);
00111 
00113     size_t memoryAllocated() { return dataend-data; }
00114 
00116     size_t memoryUsed() { return curpos-data; }
00117 
00119     virtual void compacify();
00120 };
00121 
00122 DECLARE_OBJECT_PTR(CompressedVMatrix);
00123 
00124 } // end of namespace PLearn
00125 #endif
00126 
00127 
00128 /*
00129   Local Variables:
00130   mode:c++
00131   c-basic-offset:4
00132   c-file-style:"stroustrup"
00133   c-file-offsets:((innamespace . 0)(inline-open . 0))
00134   indent-tabs-mode:nil
00135   fill-column:79
00136   End:
00137 */
00138 // 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