/usr/include/linbox/blackbox/diagonal-gf2.h is in liblinbox-dev 1.4.2-3.
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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 | /* linbox/blackbox/diagonal-gf2.h
* Copyright (C) 1999-2001 William J Turner,
* 2001 Bradford Hovinen
*
* Written by William J Turner <wjturner@math.ncsu.edu>,
* Bradford Hovinen <hovinen@cis.udel.edu>
*
* ------------------------------------
* Modified by Dmitriy Morozov <linbox@foxcub.org>. May 28, 2002.
*
* Added parametrization of VectorCategory tags by VectorTraits. See
* vector-traits.h for more details.
*
* ------------------------------------
*
*
* ========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========
*.
*/
/*! @file blackbox/diagonal-gf2.h
* @ingroup blackbox
* @brief Random diagonal matrices and diagonal matrices
* Class especially meant for diagonal precondtionners
*/
#ifndef __LINBOX_diagonal_gf2_H
#define __LINBOX_diagonal_gf2_H
#include "linbox/field/gf2.h"
#include "linbox/blackbox/diagonal.h"
namespace LinBox
{
template <>
class Diagonal<GF2, VectorTraits<Vector<GF2>::Dense>::VectorCategory> : public BlackboxArchetype {
public:
typedef GF2 Field;
typedef Vector<GF2>::Dense Vector;
typedef BlackboxArchetype Blackbox;
typedef bool Element;
Diagonal (const Field & F, const BitVector &y) :
_field(&F), _v (y)
{}
/// The field.
const Field& field() const
{
return *_field;
}
Blackbox *clone() const
{
return new Diagonal (*this);
}
template <class OutVector, class InVector>
OutVector& apply (OutVector& y, const InVector& x) const
{
linbox_check (y.size () == x.size ());
linbox_check (y.size () == _v.size ());
typename InVector::const_iterator j1 = x.begin();
typename OutVector::iterator i = y.begin();
BitVector::const_iterator j2 = _v.begin();
for (; i != y.end (); ++i, ++j1, ++j2)
*i = *j1 & *j2;
return y;
}
Vector& apply (Vector& y, const Vector& x) const
{
linbox_check (y.size () == x.size ());
linbox_check (y.size () == _v.size ());
BitVector::word_iterator i = y.wordBegin ();
BitVector::const_word_iterator j1 = x.wordBegin (), j2 = _v.wordBegin ();
for (; i != y.wordEnd (); ++i, ++j1, ++j2)
*i = *j1 & *j2;
return y;
}
template <class OutVector, class InVector>
OutVector& applyTranspose (OutVector& y, const InVector& x) const
{
return apply (y, x);
}
size_t rowdim () const
{
return _v.size ();
}
size_t coldim () const
{
return _v.size ();
}
/** Get an entry and store it in the given value
* @param x Element in which to store result
* @param i Row index
* @param j Column index
* @return Reference to x
*/
Element &getEntry (Element &x, size_t i, size_t j) const
{
return (i==j?x=this->_v[i]:x=false);
}
protected:
const Field *_field;
// Bit vector of elements
BitVector _v;
}; // template <Field, Vector> class Diagonal<DenseVectorTag>
}
#endif // __LINBOX_diagonal_gf2_H
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