PLearn 0.1
Range.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 //
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 
00039 /* *******************************************************      
00040  * $Id: Range.h 8243 2007-11-12 18:11:30Z nouiz $
00041  * AUTHORS: Pascal Vincent & Yoshua Bengio
00042  * This file is part of the PLearn library.
00043  ******************************************************* */
00044 
00045 // See Mat.h for a description the PLearn native binary file format for matrices and vectors (.pmat .pvec)
00046 
00047 
00050 #ifndef Range_INC
00051 #define Range_INC
00052 
00053 namespace PLearn {
00054 using namespace std;
00055 
00056 class Range
00057 {
00058 public:
00059     int start; 
00060     int length; 
00061       
00062     Range(int the_start=0, int the_length=0)
00063         :start(the_start), length(the_length) {}
00064       
00065     bool isEmpty() { return length<=0; }
00066 
00067     bool operator==(Range r) const
00068     { return start==r.start && length==r.length; }
00069 
00070     bool operator<(Range r) const
00071     { return start<r.start || (start==r.start && length<r.length); }
00072 
00074     operator void*() { return (length>0 ? this : 0); }
00075 };
00076   
00077 inline ostream& operator<<(ostream& out, Range r)
00078 { 
00079     out << "[" << r.start << "," << r.start+r.length-1 << "]"; 
00080     return out;
00081 }
00082 
00083 } // end of namespace PLearn
00084 
00085 #endif
00086 
00087 
00088 /*
00089   Local Variables:
00090   mode:c++
00091   c-basic-offset:4
00092   c-file-style:"stroustrup"
00093   c-file-offsets:((innamespace . 0)(inline-open . 0))
00094   indent-tabs-mode:nil
00095   fill-column:79
00096   End:
00097 */
00098 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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