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- /* vector/subvector_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.
- */
- QUALIFIED_VIEW(_gsl_vector, view)
- FUNCTION(gsl_vector, subvector) (QUALIFIED_TYPE(gsl_vector) * v, size_t offset, size_t n)
- {
- QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
- if (n == 0)
- {
- GSL_ERROR_VAL ("vector length n must be positive integer",
- GSL_EINVAL, view);
- }
- if (offset + (n - 1) >= v->size)
- {
- GSL_ERROR_VAL ("view would extend past end of vector",
- GSL_EINVAL, view);
- }
- {
- TYPE(gsl_vector) s = NULL_VECTOR;
- s.data = v->data + MULTIPLICITY * v->stride * offset ;
- s.size = n;
- s.stride = v->stride;
- s.block = v->block;
- s.owner = 0;
- view.vector = s;
- return view;
- }
- }
- QUALIFIED_VIEW(_gsl_vector, view)
- FUNCTION(gsl_vector, subvector_with_stride) (QUALIFIED_TYPE(gsl_vector) * v, size_t offset, size_t stride, size_t n)
- {
- QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
- if (n == 0)
- {
- GSL_ERROR_VAL ("vector length n must be positive integer",
- GSL_EINVAL, view);
- }
- if (stride == 0)
- {
- GSL_ERROR_VAL ("stride must be positive integer",
- GSL_EINVAL, view);
- }
- if (offset + (n - 1) * stride >= v->size)
- {
- GSL_ERROR_VAL ("view would extend past end of vector",
- GSL_EINVAL, view);
- }
- {
- TYPE(gsl_vector) s = NULL_VECTOR;
- s.data = v->data + MULTIPLICITY * v->stride * offset ;
- s.size = n;
- s.stride = v->stride * stride;
- s.block = v->block;
- s.owner = 0;
-
- view.vector = s;
- return view;
- }
- }
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