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- /* vector/swap_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.
- */
- int
- FUNCTION (gsl_vector, swap) (TYPE (gsl_vector) * v, TYPE (gsl_vector) * w)
- {
- ATOMIC * d1 = v->data ;
- ATOMIC * d2 = w->data ;
- const size_t size = v->size ;
- const size_t s1 = MULTIPLICITY * v->stride ;
- const size_t s2 = MULTIPLICITY * w->stride ;
- size_t i, k ;
- if (v->size != w->size)
- {
- GSL_ERROR("vector lengths must be equal", GSL_EINVAL);
- }
- for (i = 0; i < size; i++)
- {
- for (k = 0; k < MULTIPLICITY; k++)
- {
- ATOMIC tmp = d1[i*s1 + k];
- d1[i*s1+k] = d2[i*s2 + k];
- d2[i*s2+k] = tmp;
- }
- }
-
- return GSL_SUCCESS;
- }
- int
- FUNCTION (gsl_vector, swap_elements) (TYPE (gsl_vector) * v, const size_t i, const size_t j)
- {
- ATOMIC * data = v->data ;
- const size_t size = v->size ;
- const size_t stride = v->stride ;
- if (i >= size)
- {
- GSL_ERROR("first index is out of range", GSL_EINVAL);
- }
- if (j >= size)
- {
- GSL_ERROR("second index is out of range", GSL_EINVAL);
- }
- if (i != j)
- {
- const size_t s = MULTIPLICITY * stride ;
- size_t k ;
- for (k = 0; k < MULTIPLICITY; k++)
- {
- ATOMIC tmp = data[j*s + k];
- data[j*s+k] = data[i*s + k];
- data[i*s+k] = tmp;
- }
- }
-
- return GSL_SUCCESS;
- }
- int
- FUNCTION (gsl_vector, reverse) (TYPE (gsl_vector) * v)
- {
- ATOMIC * data = v->data ;
- const size_t size = v->size ;
- const size_t stride = v->stride ;
- const size_t s = MULTIPLICITY * stride ;
-
- size_t i ;
- for (i = 0 ; i < (size / 2) ; i++)
- {
- size_t j = size - i - 1 ;
- size_t k;
- for (k = 0; k < MULTIPLICITY; k++)
- {
- ATOMIC tmp = data[j*s + k];
- data[j*s+k] = data[i*s + k];
- data[i*s+k] = tmp;
- }
- }
-
- return GSL_SUCCESS;
- }
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