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/* matrix/rowcol_source.c
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Gerard Jungman, Brian Gough
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
QUALIFIED_VIEW(_gsl_vector,view)
FUNCTION (gsl_matrix, row) (QUALIFIED_TYPE(gsl_matrix) * m, const size_t i)
{
QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
if (i >= m->size1)
{
GSL_ERROR_VAL ("row index is out of range", GSL_EINVAL, view);
}
{
TYPE(gsl_vector) v = NULL_VECTOR;
v.data = m->data + i * MULTIPLICITY * m->tda;
v.size = m->size2;
v.stride = 1;
v.block = m->block;
v.owner = 0;
view.vector = v;
return view;
}
}
QUALIFIED_VIEW(_gsl_vector,view)
FUNCTION (gsl_matrix, column) (QUALIFIED_TYPE(gsl_matrix) * m, const size_t j)
{
QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
if (j >= m->size2)
{
GSL_ERROR_VAL ("column index is out of range", GSL_EINVAL, view);
}
{
TYPE(gsl_vector) v = NULL_VECTOR;
v.data = m->data + j * MULTIPLICITY;
v.size = m->size1;
v.stride = m->tda;
v.block = m->block;
v.owner = 0;
view.vector = v;
return view;
}
}
QUALIFIED_VIEW(_gsl_vector,view)
FUNCTION (gsl_matrix, diagonal) (QUALIFIED_TYPE(gsl_matrix) * m)
{
QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
TYPE(gsl_vector) v = NULL_VECTOR;
v.data = m->data;
v.size = GSL_MIN(m->size1,m->size2);
v.stride = m->tda + 1;
v.block = m->block;
v.owner = 0;
view.vector = v;
return view;
}
QUALIFIED_VIEW(_gsl_vector,view)
FUNCTION (gsl_matrix, subdiagonal) (QUALIFIED_TYPE(gsl_matrix) * m,
const size_t k)
{
QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
if (k >= m->size1)
{
GSL_ERROR_VAL ("subdiagonal index is out of range", GSL_EINVAL, view);
}
{
TYPE(gsl_vector) v = NULL_VECTOR;
v.data = m->data + k * MULTIPLICITY * m->tda;
v.size = GSL_MIN(m->size1 - k, m->size2);
v.stride = m->tda + 1;
v.block = m->block;
v.owner = 0;
view.vector = v;
return view;
}
}
QUALIFIED_VIEW(_gsl_vector,view)
FUNCTION (gsl_matrix, superdiagonal) (QUALIFIED_TYPE(gsl_matrix) * m,
const size_t k)
{
QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
if (k >= m->size2)
{
GSL_ERROR_VAL ("column index is out of range", GSL_EINVAL, view);
}
{
TYPE(gsl_vector) v = NULL_VECTOR;
v.data = m->data + k * MULTIPLICITY;
v.size = GSL_MIN(m->size1, m->size2 - k);
v.stride = m->tda + 1;
v.block = m->block;
v.owner = 0;
view.vector = v;
return view;
}
}
QUALIFIED_VIEW(_gsl_vector,view)
FUNCTION (gsl_matrix, subrow) (QUALIFIED_TYPE(gsl_matrix) * m, const size_t i, const size_t offset, const size_t n)
{
QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
if (i >= m->size1)
{
GSL_ERROR_VAL ("row index is out of range", GSL_EINVAL, view);
}
else if (n == 0)
{
GSL_ERROR_VAL ("vector length n must be positive integer",
GSL_EINVAL, view);
}
else if (offset + n > m->size2)
{
GSL_ERROR_VAL ("dimension n overflows matrix", GSL_EINVAL, view);
}
{
TYPE(gsl_vector) v = NULL_VECTOR;
v.data = m->data + MULTIPLICITY * (i * m->tda + offset);
v.size = n;
v.stride = 1;
v.block = m->block;
v.owner = 0;
view.vector = v;
return view;
}
}
QUALIFIED_VIEW(_gsl_vector,view)
FUNCTION (gsl_matrix, subcolumn) (QUALIFIED_TYPE(gsl_matrix) * m, const size_t j, const size_t offset, const size_t n)
{
QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
if (j >= m->size2)
{
GSL_ERROR_VAL ("column index is out of range", GSL_EINVAL, view);
}
else if (n == 0)
{
GSL_ERROR_VAL ("vector length n must be positive integer",
GSL_EINVAL, view);
}
else if (offset + n > m->size1)
{
GSL_ERROR_VAL ("dimension n overflows matrix", GSL_EINVAL, view);
}
{
TYPE(gsl_vector) v = NULL_VECTOR;
v.data = m->data + MULTIPLICITY * (offset * m->tda + j);
v.size = n;
v.stride = m->tda;
v.block = m->block;
v.owner = 0;
view.vector = v;
return view;
}
}
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