/* matrix/init_source.c
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000 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.
*/
TYPE(gsl_matrix) *
FUNCTION(gsl_matrix, alloc) (const size_t n1, const size_t n2)
{
TYPE(gsl_block) * block;
TYPE(gsl_matrix) * m;
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);
}
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;
}
void FUNCTION(gsl_matrix, free) (TYPE(gsl_matrix) * 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);
}
}
}