/usr/include/linbox/blackbox/null-matrix.h is in liblinbox-dev 1.1.6~rc0-4.1.
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 | /*-* mode:C++;tab-with=8;c-basic-offset:8 -*- */
/* zhendong wan */
#ifndef __NULLMATRIX_H
#define __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
|