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rename CopyHelper into OperatorEquals, get rid of the auxiliary _copy_helper() method,

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and make sure copies are always done in column-dominant order
This commit is contained in:
Benoit Jacob
2007-12-11 10:19:49 +00:00
parent 2b20814ced
commit 0a7086f1ec
2 changed files with 17 additions and 24 deletions
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88
src/Core/OperatorEquals.h Normal file
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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra. Eigen itself is part of the KDE project.
//
// Copyright (C) 2007 Michael Olbrich <michael.olbrich@gmx.net>
// Copyright (C) 2006-2007 Benoit Jacob <jacob@math.jussieu.fr>
//
// Eigen is free software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the Free Software
// Foundation; either version 2 or (at your option) any later version.
//
// Eigen 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 General Public License for more
// details.
//
// You should have received a copy of the GNU General Public License along
// with Eigen; if not, write to the Free Software Foundation, Inc., 51
// Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. This exception does not invalidate any other reasons why a work
// based on this file might be covered by the GNU General Public License.
#ifndef EIGEN_OPERATOREQUALS_H
#define EIGEN_OPERATOREQUALS_H
template<int UnrollCount, int Rows> struct OperatorEqualsUnroller
{
static const int col = (UnrollCount-1) / Rows;
static const int row = (UnrollCount-1) % Rows;
template <typename Derived1, typename Derived2>
static void run(Derived1 &dst, const Derived2 &src)
{
OperatorEqualsUnroller<UnrollCount-1, Rows>::run(dst, src);
dst.write(row, col) = src.read(row, col);
}
};
// prevent buggy user code from causing an infinite recursion
template<int UnrollCount> struct OperatorEqualsUnroller<UnrollCount, 0>
{
template <typename Derived1, typename Derived2>
static void run(Derived1 &dst, const Derived2 &src)
{
EIGEN_UNUSED(dst);
EIGEN_UNUSED(src);
}
};
template<int Rows> struct OperatorEqualsUnroller<1, Rows>
{
template <typename Derived1, typename Derived2>
static void run(Derived1 &dst, const Derived2 &src)
{
dst.write(0, 0) = src.read(0, 0);
}
};
template<int Rows> struct OperatorEqualsUnroller<Dynamic, Rows>
{
template <typename Derived1, typename Derived2>
static void run(Derived1 &dst, const Derived2 &src)
{
EIGEN_UNUSED(dst);
EIGEN_UNUSED(src);
}
};
template<typename Scalar, typename Derived>
template<typename OtherDerived>
Derived& MatrixBase<Scalar, Derived>
::operator=(const MatrixBase<Scalar, OtherDerived>& other)
{
assert(rows() == other.rows() && cols() == other.cols());
if(EIGEN_UNROLLED_LOOPS && SizeAtCompileTime != Dynamic && SizeAtCompileTime <= 25)
OperatorEqualsUnroller<SizeAtCompileTime, RowsAtCompileTime>::run(*this, other);
else
for(int j = 0; j < cols(); j++) //traverse in column-dominant order
for(int i = 0; i < rows(); i++)
write(i, j) = other.read(i, j);
return *static_cast<Derived*>(this);
}
#endif // EIGEN_OPERATOREQUALS_H