/usr/include/linbox/blackbox/null-matrix.h is in liblinbox-dev 1.4.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 | /* Copyright (C) 2010 LinBox
* Written by
* zhendong wan
*
*
*
* ========LICENCE========
* This file is part of the library LinBox.
*
* LinBox is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* ========LICENCE========
*/
#ifndef __LINBOX_bb_nullmatrix_H
#define __LINBOX_bb_nullmatrix_H
#include "linbox/util/debug.h"
#include "linbox/blackbox/blackbox-interface.h"
namespace LinBox
{
// couldn't a null instance of one of the other classes serve as well?
/** \brief This is a representation of the 0 by 0 empty matrix which does not occupy memory.
* It has it's uses!
* \ingroup blackbox
*/
class NullMatrix : public BlackboxInterface{
public:
NullMatrix() {}//cout << "NullMatrix default cstor" << endl;}
NullMatrix(const NullMatrix& n) {}
virtual ~NullMatrix() {}
public:
template<class OutVector, class InVector>
inline OutVector& apply(OutVector& y, const InVector& x) const {
linbox_check(y.size()==0);
linbox_check(x.size()==0);
return y;
}
/* applyIn is depreciated. If you have a desire to use it, please tell me about that. -bds
virtual inline Vector& applyIn(Vector& x) const {
linbox_check(x.size()==0);
return x;
}
*/
template<class OutVector, class InVector>
inline OutVector& applyTranspose(OutVector& y, const InVector& x) const {
linbox_check(y.size()==0);
linbox_check(x.size()==0);
return y;
}
/* applyIn is depreciated. If you have a desire to use it, please tell me about that. -bds
virtual inline Vector& applyTransposeIn(Vector& x) const {
linbox_check(x.size()==0);
return x;
}
*/
virtual inline size_t rowdim() const {return 0;}
virtual inline size_t coldim() const {return 0;}
template<typename _Tp1>
struct rebind
{ typedef NullMatrix other; };
};
}
#endif //__LINBOX_bb_nullmatrix_H
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