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/* matrix/init_source.c
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*
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* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007, 2009 Gerard Jungman, Brian Gough
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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TYPE (gsl_matrix) *
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FUNCTION (gsl_matrix, alloc) (const size_t n1, const size_t n2)
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{
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TYPE (gsl_block) * block;
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TYPE (gsl_matrix) * m;
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m = (TYPE (gsl_matrix) *) malloc (sizeof (TYPE (gsl_matrix)));
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if (m == 0)
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{
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GSL_ERROR_VAL ("failed to allocate space for matrix struct",
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GSL_ENOMEM, 0);
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}
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/* FIXME: n1*n2 could overflow for large dimensions */
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block = FUNCTION(gsl_block, alloc) (n1 * n2) ;
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if (block == 0)
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{
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GSL_ERROR_VAL ("failed to allocate space for block",
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GSL_ENOMEM, 0);
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}
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m->data = block->data;
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m->size1 = n1;
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m->size2 = n2;
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m->tda = n2;
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m->block = block;
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m->owner = 1;
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return m;
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}
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TYPE (gsl_matrix) *
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FUNCTION (gsl_matrix, calloc) (const size_t n1, const size_t n2)
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{
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size_t i;
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TYPE (gsl_matrix) * m = FUNCTION (gsl_matrix, alloc) (n1, n2);
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if (m == 0)
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return 0;
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/* initialize matrix to zero */
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memset(m->data, 0, MULTIPLICITY * n1 * n2 * sizeof(ATOMIC));
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for (i = 0; i < MULTIPLICITY * n1 * n2; i++)
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{
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m->data[i] = 0;
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}
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return m;
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}
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TYPE (gsl_matrix) *
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FUNCTION (gsl_matrix, alloc_from_block) (TYPE(gsl_block) * block,
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const size_t offset,
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const size_t n1,
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const size_t n2,
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const size_t d2)
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{
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TYPE (gsl_matrix) * m;
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if (d2 < n2)
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{
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GSL_ERROR_VAL ("matrix dimension d2 must be greater than n2",
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GSL_EINVAL, 0);
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}
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else if (block->size < offset + n1 * d2)
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{
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GSL_ERROR_VAL ("matrix size exceeds available block size",
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GSL_EINVAL, 0);
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}
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m = (TYPE (gsl_matrix) *) malloc (sizeof (TYPE (gsl_matrix)));
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if (m == 0)
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{
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GSL_ERROR_VAL ("failed to allocate space for matrix struct",
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GSL_ENOMEM, 0);
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}
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m->data = block->data + MULTIPLICITY * offset;
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m->size1 = n1;
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m->size2 = n2;
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m->tda = d2;
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m->block = block;
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m->owner = 0;
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return m;
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}
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TYPE (gsl_matrix) *
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FUNCTION (gsl_matrix, alloc_from_matrix) (TYPE(gsl_matrix) * mm,
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const size_t k1,
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const size_t k2,
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const size_t n1,
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const size_t n2)
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{
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TYPE (gsl_matrix) * m;
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if (k1 + n1 > mm->size1)
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{
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GSL_ERROR_VAL ("submatrix dimension 1 exceeds size of original",
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GSL_EINVAL, 0);
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}
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else if (k2 + n2 > mm->size2)
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{
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GSL_ERROR_VAL ("submatrix dimension 2 exceeds size of original",
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GSL_EINVAL, 0);
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}
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m = (TYPE (gsl_matrix) *) malloc (sizeof (TYPE (gsl_matrix)));
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if (m == 0)
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{
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GSL_ERROR_VAL ("failed to allocate space for matrix struct",
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GSL_ENOMEM, 0);
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}
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m->data = mm->data + k1 * mm->tda + k2 ;
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m->size1 = n1;
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m->size2 = n2;
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m->tda = mm->tda;
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m->block = mm->block;
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m->owner = 0;
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return m;
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}
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void
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FUNCTION (gsl_matrix, free) (TYPE (gsl_matrix) * m)
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{
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RETURN_IF_NULL (m);
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if (m->owner)
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{
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FUNCTION(gsl_block, free) (m->block);
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}
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free (m);
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}
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void
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FUNCTION (gsl_matrix, set_identity) (TYPE (gsl_matrix) * m)
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{
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size_t i, j;
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ATOMIC * const data = m->data;
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const size_t p = m->size1 ;
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const size_t q = m->size2 ;
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const size_t tda = m->tda ;
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const BASE zero = ZERO;
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const BASE one = ONE;
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for (i = 0; i < p; i++)
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{
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for (j = 0; j < q; j++)
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{
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*(BASE *) (data + MULTIPLICITY * (i * tda + j)) = ((i == j) ? one : zero);
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}
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}
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}
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void
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FUNCTION (gsl_matrix, set_zero) (TYPE (gsl_matrix) * m)
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{
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size_t i, j;
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ATOMIC * const data = m->data;
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const size_t p = m->size1 ;
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const size_t q = m->size2 ;
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const size_t tda = m->tda ;
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const BASE zero = ZERO;
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for (i = 0; i < p; i++)
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{
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for (j = 0; j < q; j++)
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{
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*(BASE *) (data + MULTIPLICITY * (i * tda + j)) = zero;
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}
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}
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}
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void
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FUNCTION (gsl_matrix, set_all) (TYPE (gsl_matrix) * m, BASE x)
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{
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size_t i, j;
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ATOMIC * const data = m->data;
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const size_t p = m->size1 ;
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const size_t q = m->size2 ;
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const size_t tda = m->tda ;
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for (i = 0; i < p; i++)
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{
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for (j = 0; j < q; j++)
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{
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*(BASE *) (data + MULTIPLICITY * (i * tda + j)) = x;
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}
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}
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}
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