/usr/include/octave-4.0.0/octave/Sparse-perm-op-defs.h is in liboctave-dev 4.0.0-3ubuntu9.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 | /* -*- C++ -*-
Copyright (C) 2009-2015 Jason Riedy
This file is part of Octave.
Octave 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 3 of the License, or (at your
option) any later version.
Octave 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 Octave; see the file COPYING. If not, see
<http://www.gnu.org/licenses/>.
*/
#if !defined (octave_Sparse_perm_op_defs_h)
#define octave_Sparse_perm_op_defs_h 1
// Matrix multiplication
template <typename SM>
SM octinternal_do_mul_colpm_sm (const octave_idx_type *pcol, const SM& a)
// Relabel the rows according to pcol.
{
const octave_idx_type nr = a.rows ();
const octave_idx_type nc = a.cols ();
const octave_idx_type nent = a.nnz ();
SM r (nr, nc, nent);
octave_sort<octave_idx_type> sort;
for (octave_idx_type j = 0; j <= nc; ++j)
r.xcidx (j) = a.cidx (j);
for (octave_idx_type j = 0; j < nc; j++)
{
octave_quit ();
OCTAVE_LOCAL_BUFFER (octave_idx_type, sidx, r.xcidx (j+1) - r.xcidx (j));
for (octave_idx_type i = r.xcidx (j), ii = 0; i < r.xcidx (j+1); i++)
{
sidx[ii++]=i;
r.xridx (i) = pcol[a.ridx (i)];
}
sort.sort (r.xridx () + r.xcidx (j), sidx, r.xcidx (j+1) - r.xcidx (j));
for (octave_idx_type i = r.xcidx (j), ii = 0; i < r.xcidx (j+1); i++)
r.xdata (i) = a.data (sidx[ii++]);
}
return r;
}
template <typename SM>
SM octinternal_do_mul_pm_sm (const PermMatrix& p, const SM& a)
{
const octave_idx_type nr = a.rows ();
if (p.cols () != nr)
{
gripe_nonconformant ("operator *", p.rows (), p.cols (), a.rows (), a.cols ());
return SM ();
}
return octinternal_do_mul_colpm_sm (p.col_perm_vec ().data (), a);
}
template <typename SM>
SM octinternal_do_mul_sm_rowpm (const SM& a, const octave_idx_type *prow)
// For a row permutation, iterate across the source a and stuff the
// results into the correct destination column in r.
{
const octave_idx_type nr = a.rows ();
const octave_idx_type nc = a.cols ();
const octave_idx_type nent = a.nnz ();
SM r (nr, nc, nent);
for (octave_idx_type j_src = 0; j_src < nc; ++j_src)
r.xcidx (prow[j_src]) = a.cidx (j_src+1) - a.cidx (j_src);
octave_idx_type k = 0;
for (octave_idx_type j = 0; j < nc; ++j)
{
const octave_idx_type tmp = r.xcidx (j);
r.xcidx (j) = k;
k += tmp;
}
r.xcidx (nc) = nent;
octave_idx_type k_src = 0;
for (octave_idx_type j_src = 0; j_src < nc; ++j_src)
{
octave_quit ();
const octave_idx_type j = prow[j_src];
const octave_idx_type kend_src = a.cidx (j_src + 1);
for (k = r.xcidx (j); k_src < kend_src; ++k, ++k_src)
{
r.xridx (k) = a.ridx (k_src);
r.xdata (k) = a.data (k_src);
}
}
assert (k_src == nent);
return r;
}
template <typename SM>
SM octinternal_do_mul_sm_colpm (const SM& a, const octave_idx_type *pcol)
// For a column permutation, iterate across the destination r and pull
// data from the correct column of a.
{
const octave_idx_type nr = a.rows ();
const octave_idx_type nc = a.cols ();
const octave_idx_type nent = a.nnz ();
SM r (nr, nc, nent);
for (octave_idx_type j = 0; j < nc; ++j)
{
const octave_idx_type j_src = pcol[j];
r.xcidx (j+1) = r.xcidx (j) + (a.cidx (j_src+1) - a.cidx (j_src));
}
assert (r.xcidx (nc) == nent);
octave_idx_type k = 0;
for (octave_idx_type j = 0; j < nc; ++j)
{
octave_quit ();
const octave_idx_type j_src = pcol[j];
octave_idx_type k_src;
const octave_idx_type kend_src = a.cidx (j_src + 1);
for (k_src = a.cidx (j_src); k_src < kend_src; ++k_src, ++k)
{
r.xridx (k) = a.ridx (k_src);
r.xdata (k) = a.data (k_src);
}
}
assert (k == nent);
return r;
}
template <typename SM>
SM octinternal_do_mul_sm_pm (const SM& a, const PermMatrix& p)
{
const octave_idx_type nc = a.cols ();
if (p.rows () != nc)
{
gripe_nonconformant ("operator *", a.rows (), a.cols (), p.rows (), p.cols ());
return SM ();
}
return octinternal_do_mul_sm_colpm (a, p.col_perm_vec ().data ());
}
#endif // octave_Sparse_perm_op_defs_h
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