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/* matrix/view_source.c
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 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 2 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_matrix,view)
FUNCTION (gsl_matrix, view_array) (QUALIFIER ATOMIC * array,
const size_t n1, const size_t n2)
{
QUALIFIED_VIEW (_gsl_matrix,view) view = NULL_MATRIX_VIEW;
if (n1 == 0)
{
GSL_ERROR_VAL ("matrix dimension n1 must be positive integer",
GSL_EINVAL, view);
}
else if (n2 == 0)
{
GSL_ERROR_VAL ("matrix dimension n2 must be positive integer",
GSL_EINVAL, view);
}
{
TYPE(gsl_matrix) m = NULL_MATRIX;
m.data = (ATOMIC *)array;
m.size1 = n1;
m.size2 = n2;
m.tda = n2;
m.block = 0;
m.owner = 0;
view.matrix = m;
return view;
}
}
QUALIFIED_VIEW (_gsl_matrix,view)
FUNCTION(gsl_matrix, view_array_with_tda) (QUALIFIER ATOMIC * base,
const size_t n1,
const size_t n2,
const size_t tda)
{
QUALIFIED_VIEW (_gsl_matrix,view) view = NULL_MATRIX_VIEW;
if (n1 == 0)
{
GSL_ERROR_VAL ("matrix dimension n1 must be positive integer",
GSL_EINVAL, view);
}
else if (n2 == 0)
{
GSL_ERROR_VAL ("matrix dimension n2 must be positive integer",
GSL_EINVAL, view);
}
else if (n2 > tda)
{
GSL_ERROR_VAL ("matrix dimension n2 must not exceed tda",
GSL_EINVAL, view);
}
{
TYPE(gsl_matrix) m = NULL_MATRIX;
m.data = (ATOMIC *)base;
m.size1 = n1;
m.size2 = n2;
m.tda = tda;
m.block = 0;
m.owner = 0;
view.matrix = m;
return view;
}
}
QUALIFIED_VIEW (_gsl_matrix,view)
FUNCTION(gsl_matrix, view_vector) (QUALIFIED_TYPE(gsl_vector) * v,
const size_t n1,
const size_t n2)
{
QUALIFIED_VIEW (_gsl_matrix,view) view = NULL_MATRIX_VIEW;
if (n1 == 0)
{
GSL_ERROR_VAL ("matrix dimension n1 must be positive integer",
GSL_EINVAL, view);
}
else if (n2 == 0)
{
GSL_ERROR_VAL ("matrix dimension n2 must be positive integer",
GSL_EINVAL, view);
}
else if (v->stride != 1)
{
GSL_ERROR_VAL ("vector must have unit stride",
GSL_EINVAL, view);
}
else if (n1 * n2 > v->size)
{
GSL_ERROR_VAL ("matrix size exceeds size of original",
GSL_EINVAL, view);
}
{
TYPE(gsl_matrix) m = NULL_MATRIX;
m.data = v->data;
m.size1 = n1;
m.size2 = n2;
m.tda = n2;
m.block = v->block;
m.owner = 0;
view.matrix = m;
return view;
}
}
QUALIFIED_VIEW (_gsl_matrix,view)
FUNCTION(gsl_matrix, view_vector_with_tda) (QUALIFIED_TYPE(gsl_vector) * v,
const size_t n1,
const size_t n2,
const size_t tda)
{
QUALIFIED_VIEW (_gsl_matrix,view) view = NULL_MATRIX_VIEW;
if (n1 == 0)
{
GSL_ERROR_VAL ("matrix dimension n1 must be positive integer",
GSL_EINVAL, view);
}
else if (n2 == 0)
{
GSL_ERROR_VAL ("matrix dimension n2 must be positive integer",
GSL_EINVAL, view);
}
else if (v->stride != 1)
{
GSL_ERROR_VAL ("vector must have unit stride",
GSL_EINVAL, view);
}
else if (n2 > tda)
{
GSL_ERROR_VAL ("matrix dimension n2 must not exceed tda",
GSL_EINVAL, view);
}
else if (n1 * tda > v->size)
{
GSL_ERROR_VAL ("matrix size exceeds size of original",
GSL_EINVAL, view);
}
{
TYPE(gsl_matrix) m = NULL_MATRIX;
m.data = v->data;
m.size1 = n1;
m.size2 = n2;
m.tda = tda;
m.block = v->block;
m.owner = 0;
view.matrix = m;
return view;
}
}
#ifdef JUNK
int
FUNCTION (gsl_matrix, view_from_matrix) (TYPE(gsl_matrix) * m,
TYPE(gsl_matrix) * mm,
const size_t k1,
const size_t k2,
const size_t n1,
const size_t n2)
{
if (n1 == 0)
{
GSL_ERROR_VAL ("matrix dimension n1 must be positive integer",
GSL_EINVAL, 0);
}
else if (n2 == 0)
{
GSL_ERROR_VAL ("matrix dimension n2 must be positive integer",
GSL_EINVAL, 0);
}
else if (k1 + n1 > mm->size1)
{
GSL_ERROR_VAL ("submatrix dimension 1 exceeds size of original",
GSL_EINVAL, 0);
}
else if (k2 + n2 > mm->size2)
{
GSL_ERROR_VAL ("submatrix dimension 2 exceeds size of original",
GSL_EINVAL, 0);
}
m->data = mm->data + k1 * mm->tda + k2 ;
m->size1 = n1;
m->size2 = n2;
m->tda = mm->tda;
m->block = mm->block;
m->owner = 0;
return GSL_SUCCESS;
}
int
FUNCTION (gsl_vector, view_row_from_matrix) (TYPE(gsl_vector) * v,
TYPE(gsl_matrix) * m,
const size_t i)
{
const size_t column_length = m->size1;
if (i >= column_length)
{
GSL_ERROR ("row index is out of range", GSL_EINVAL);
}
if (v->block != 0)
{
GSL_ERROR ("vector already has memory allocated to it", GSL_ENOMEM);
}
v->data = m->data + MULTIPLICITY * i * m->tda ;
v->size = m->size2;
v->stride = 1;
return GSL_SUCCESS;
}
int
FUNCTION (gsl_vector, view_col_from_matrix) (TYPE(gsl_vector) * v,
TYPE(gsl_matrix) * m,
const size_t j)
{
const size_t row_length = m->size2;
if (j >= row_length)
{
GSL_ERROR_VAL ("column index is out of range", GSL_EINVAL, 0);
}
if (v->block != 0)
{
GSL_ERROR ("vector already has memory allocated to it", GSL_ENOMEM);
}
v->data = m->data + MULTIPLICITY * j ;
v->size = m->size1;
v->stride = m->tda;
return GSL_SUCCESS;
}
#endif /* JUNK */
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