/usr/include/armadillo_bits/glue_kron_meat.hpp is in libarmadillo-dev 1:4.200.0+dfsg-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 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 | // Copyright (C) 2009-2013 Conrad Sanderson
// Copyright (C) 2009-2013 NICTA (www.nicta.com.au)
// Copyright (C) 2009-2010 Dimitrios Bouzas
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
//! \addtogroup glue_kron
//! @{
//! \brief
//! both input matrices have the same element type
template<typename eT>
inline
void
glue_kron::direct_kron(Mat<eT>& out, const Mat<eT>& A, const Mat<eT>& B)
{
arma_extra_debug_sigprint();
const uword A_rows = A.n_rows;
const uword A_cols = A.n_cols;
const uword B_rows = B.n_rows;
const uword B_cols = B.n_cols;
out.set_size(A_rows*B_rows, A_cols*B_cols);
for(uword j = 0; j < A_cols; j++)
{
for(uword i = 0; i < A_rows; i++)
{
out.submat(i*B_rows, j*B_cols, (i+1)*B_rows-1, (j+1)*B_cols-1) = A.at(i,j) * B;
}
}
}
//! \brief
//! different types of input matrices
//! A -> complex, B -> basic element type
template<typename T>
inline
void
glue_kron::direct_kron(Mat< std::complex<T> >& out, const Mat< std::complex<T> >& A, const Mat<T>& B)
{
arma_extra_debug_sigprint();
typedef typename std::complex<T> eT;
const uword A_rows = A.n_rows;
const uword A_cols = A.n_cols;
const uword B_rows = B.n_rows;
const uword B_cols = B.n_cols;
out.set_size(A_rows*B_rows, A_cols*B_cols);
Mat<eT> tmp_B = conv_to< Mat<eT> >::from(B);
for(uword j = 0; j < A_cols; j++)
{
for(uword i = 0; i < A_rows; i++)
{
out.submat(i*B_rows, j*B_cols, (i+1)*B_rows-1, (j+1)*B_cols-1) = A.at(i,j) * tmp_B;
}
}
}
//! \brief
//! different types of input matrices
//! A -> basic element type, B -> complex
template<typename T>
inline
void
glue_kron::direct_kron(Mat< std::complex<T> >& out, const Mat<T>& A, const Mat< std::complex<T> >& B)
{
arma_extra_debug_sigprint();
const uword A_rows = A.n_rows;
const uword A_cols = A.n_cols;
const uword B_rows = B.n_rows;
const uword B_cols = B.n_cols;
out.set_size(A_rows*B_rows, A_cols*B_cols);
for(uword j = 0; j < A_cols; j++)
{
for(uword i = 0; i < A_rows; i++)
{
out.submat(i*B_rows, j*B_cols, (i+1)*B_rows-1, (j+1)*B_cols-1) = A.at(i,j) * B;
}
}
}
//! \brief
//! apply Kronecker product for two objects with same element type
template<typename T1, typename T2>
inline
void
glue_kron::apply(Mat<typename T1::elem_type>& out, const Glue<T1,T2,glue_kron>& X)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const unwrap<T1> A_tmp(X.A);
const unwrap<T2> B_tmp(X.B);
const Mat<eT>& A = A_tmp.M;
const Mat<eT>& B = B_tmp.M;
if( (&out != &A) && (&out != &B) )
{
glue_kron::direct_kron(out, A, B);
}
else
{
Mat<eT> tmp;
glue_kron::direct_kron(tmp, A, B);
out.steal_mem(tmp);
}
}
//! @}
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