PLearn 0.1
VMatAccessBuffer.h
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00001 // -*- C++ -*-
00002 
00003 // VMatAccessBuffer.h
00004 //
00005 // Copyright (C) 2006 Christian Dorion
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 // Authors: Christian Dorion
00036 
00040 #ifndef VMatAccessBuffer_INC
00041 #define VMatAccessBuffer_INC
00042 
00043 #include <deque>
00044 #include "VMat.h"
00045 
00046 namespace PLearn {
00047 
00051 class VMatAccessBuffer: public PPointable
00052 {
00053 public:
00054     VMatAccessBuffer(VMat source, int max_size=250);
00055     void getRow(int row, const Vec& rowbuf);
00056     void lookAhead(int row, const Vec& rowbuf);
00057 
00059     VMatAccessBuffer* deepCopy(CopiesMap& copies) const;
00060     
00061 private:
00062     VMat        m_source;
00063     int         m_current_row;
00064     int         m_max_size;
00065     Vec         m_row_buffer;
00066     deque<Vec>  m_cached_rows;                
00067 };
00068     
00069 
00070 
00071 } // end of namespace PLearn
00072 
00073 #endif
00074 
00075 
00076 /*
00077   Local Variables:
00078   mode:c++
00079   c-basic-offset:4
00080   c-file-style:"stroustrup"
00081   c-file-offsets:((innamespace . 0)(inline-open . 0))
00082   indent-tabs-mode:nil
00083   fill-column:79
00084   End:
00085 */
00086 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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