PLearn 0.1
BufferedIntVecFile.h
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00001 // -*- C++ -*-
00002 
00003 // PLearn (A C++ Machine Learning Library)
00004 // Copyright (C) 1998 Pascal Vincent
00005 // Copyright (C) 1999-2002 Pascal Vincent, Yoshua Bengio and University of Montreal
00006 // Copyright (C) 2006 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 #ifndef BufferedIntVecFile_INC
00038 #define BufferedIntVecFile_INC
00039 
00040 #include <plearn/io/IntVecFile.h>
00041 
00042 namespace PLearn {
00043 using namespace std;
00044 
00045 class BufferedIntVecFile : public IntVecFile
00046 {
00047 protected:
00048 
00049   static const int DEFAULT_BUFLEN= 65536;
00050 
00051   typedef IntVecFile inherited;
00052   
00053   mutable int bufstart;
00054   const int buflen;
00055   mutable int* buf;
00056   mutable bool bufmod;
00057 
00058 public:
00060     BufferedIntVecFile(int buflen_= DEFAULT_BUFLEN)
00061       : IntVecFile(), bufstart(-1), buflen(buflen_), bufmod(false)
00062       { buf= new int[buflen]; }
00063     BufferedIntVecFile(const string& the_filename, bool readwrite=false, int buflen_= DEFAULT_BUFLEN)
00064       : IntVecFile(the_filename, readwrite), bufstart(-1), buflen(buflen_), bufmod(false)
00065       { buf= new int[buflen]; }
00066 
00068     //BufferedIntVecFile(const IntVecFile& other);
00069 
00070     virtual void open(const string& the_filename, bool readwrite=false);
00071     virtual void close();
00072 
00073     virtual int get(int i) const;
00074     virtual void put(int i, int value);
00075   
00076     virtual inline int operator[](int i) const { return get(i); }
00077     virtual inline void append(int value) { put(length(),value); }
00078 
00079     virtual ~BufferedIntVecFile();
00080 
00081  protected:
00082     virtual void getBuf(int bufstart_);
00083     virtual void flush();
00084 
00085 };
00086 
00087 
00088 } // end of namespace PLearn
00089 
00090 #endif
00091 
00092 
00093 /*
00094   Local Variables:
00095   mode:c++
00096   c-basic-offset:4
00097   c-file-style:"stroustrup"
00098   c-file-offsets:((innamespace . 0)(inline-open . 0))
00099   indent-tabs-mode:nil
00100   fill-column:79
00101   End:
00102 */
00103 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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