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/* matrix/init_source.c
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007, 2009 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.
*/
TYPE (gsl_matrix) *
FUNCTION (gsl_matrix, alloc) (const size_t n1, const size_t n2)
{
TYPE (gsl_block) * block;
TYPE (gsl_matrix) * m;
m = (TYPE (gsl_matrix) *) malloc (sizeof (TYPE (gsl_matrix)));
if (m == 0)
{
GSL_ERROR_VAL ("failed to allocate space for matrix struct",
GSL_ENOMEM, 0);
}
/* FIXME: n1*n2 could overflow for large dimensions */
block = FUNCTION(gsl_block, alloc) (n1 * n2) ;
if (block == 0)
{
GSL_ERROR_VAL ("failed to allocate space for block",
GSL_ENOMEM, 0);
}
m->data = block->data;
m->size1 = n1;
m->size2 = n2;
m->tda = n2;
m->block = block;
m->owner = 1;
return m;
}
TYPE (gsl_matrix) *
FUNCTION (gsl_matrix, calloc) (const size_t n1, const size_t n2)
{
size_t i;
TYPE (gsl_matrix) * m = FUNCTION (gsl_matrix, alloc) (n1, n2);
if (m == 0)
return 0;
/* initialize matrix to zero */
memset(m->data, 0, MULTIPLICITY * n1 * n2 * sizeof(ATOMIC));
for (i = 0; i < MULTIPLICITY * n1 * n2; i++)
{
m->data[i] = 0;
}
return m;
}
TYPE (gsl_matrix) *
FUNCTION (gsl_matrix, alloc_from_block) (TYPE(gsl_block) * block,
const size_t offset,
const size_t n1,
const size_t n2,
const size_t d2)
{
TYPE (gsl_matrix) * m;
if (d2 < n2)
{
GSL_ERROR_VAL ("matrix dimension d2 must be greater than n2",
GSL_EINVAL, 0);
}
else if (block->size < offset + n1 * d2)
{
GSL_ERROR_VAL ("matrix size exceeds available block size",
GSL_EINVAL, 0);
}
m = (TYPE (gsl_matrix) *) malloc (sizeof (TYPE (gsl_matrix)));
if (m == 0)
{
GSL_ERROR_VAL ("failed to allocate space for matrix struct",
GSL_ENOMEM, 0);
}
m->data = block->data + MULTIPLICITY * offset;
m->size1 = n1;
m->size2 = n2;
m->tda = d2;
m->block = block;
m->owner = 0;
return m;
}
TYPE (gsl_matrix) *
FUNCTION (gsl_matrix, alloc_from_matrix) (TYPE(gsl_matrix) * mm,
const size_t k1,
const size_t k2,
const size_t n1,
const size_t n2)
{
TYPE (gsl_matrix) * m;
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 = (TYPE (gsl_matrix) *) malloc (sizeof (TYPE (gsl_matrix)));
if (m == 0)
{
GSL_ERROR_VAL ("failed to allocate space for matrix struct",
GSL_ENOMEM, 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 m;
}
void
FUNCTION (gsl_matrix, free) (TYPE (gsl_matrix) * m)
{
RETURN_IF_NULL (m);
if (m->owner)
{
FUNCTION(gsl_block, free) (m->block);
}
free (m);
}
void
FUNCTION (gsl_matrix, set_identity) (TYPE (gsl_matrix) * m)
{
size_t i, j;
ATOMIC * const data = m->data;
const size_t p = m->size1 ;
const size_t q = m->size2 ;
const size_t tda = m->tda ;
const BASE zero = ZERO;
const BASE one = ONE;
for (i = 0; i < p; i++)
{
for (j = 0; j < q; j++)
{
*(BASE *) (data + MULTIPLICITY * (i * tda + j)) = ((i == j) ? one : zero);
}
}
}
void
FUNCTION (gsl_matrix, set_zero) (TYPE (gsl_matrix) * m)
{
size_t i, j;
ATOMIC * const data = m->data;
const size_t p = m->size1 ;
const size_t q = m->size2 ;
const size_t tda = m->tda ;
const BASE zero = ZERO;
for (i = 0; i < p; i++)
{
for (j = 0; j < q; j++)
{
*(BASE *) (data + MULTIPLICITY * (i * tda + j)) = zero;
}
}
}
void
FUNCTION (gsl_matrix, set_all) (TYPE (gsl_matrix) * m, BASE x)
{
size_t i, j;
ATOMIC * const data = m->data;
const size_t p = m->size1 ;
const size_t q = m->size2 ;
const size_t tda = m->tda ;
for (i = 0; i < p; i++)
{
for (j = 0; j < q; j++)
{
*(BASE *) (data + MULTIPLICITY * (i * tda + j)) = x;
}
}
}
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