| /* matrix/rowcol_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. |
| */ |
| |
| QUALIFIED_VIEW(_gsl_vector,view) |
| FUNCTION (gsl_matrix, row) (QUALIFIED_TYPE(gsl_matrix) * m, const size_t i) |
| { |
| QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW; |
| |
| if (i >= m->size1) |
| { |
| GSL_ERROR_VAL ("row index is out of range", GSL_EINVAL, view); |
| } |
| |
| { |
| TYPE(gsl_vector) v = NULL_VECTOR; |
| |
| v.data = m->data + i * MULTIPLICITY * m->tda; |
| v.size = m->size2; |
| v.stride = 1; |
| v.block = m->block; |
| v.owner = 0; |
| |
| view.vector = v; |
| return view; |
| } |
| } |
| |
| QUALIFIED_VIEW(_gsl_vector,view) |
| FUNCTION (gsl_matrix, column) (QUALIFIED_TYPE(gsl_matrix) * m, const size_t j) |
| { |
| QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW; |
| |
| if (j >= m->size2) |
| { |
| GSL_ERROR_VAL ("column index is out of range", GSL_EINVAL, view); |
| } |
| |
| { |
| TYPE(gsl_vector) v = NULL_VECTOR; |
| |
| v.data = m->data + j * MULTIPLICITY; |
| v.size = m->size1; |
| v.stride = m->tda; |
| v.block = m->block; |
| v.owner = 0; |
| |
| view.vector = v; |
| return view; |
| } |
| } |
| |
| QUALIFIED_VIEW(_gsl_vector,view) |
| FUNCTION (gsl_matrix, diagonal) (QUALIFIED_TYPE(gsl_matrix) * m) |
| { |
| QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW; |
| |
| TYPE(gsl_vector) v = NULL_VECTOR; |
| v.data = m->data; |
| v.size = GSL_MIN(m->size1,m->size2); |
| v.stride = m->tda + 1; |
| v.block = m->block; |
| v.owner = 0; |
| |
| view.vector = v; |
| return view; |
| } |
| |
| QUALIFIED_VIEW(_gsl_vector,view) |
| FUNCTION (gsl_matrix, subdiagonal) (QUALIFIED_TYPE(gsl_matrix) * m, |
| const size_t k) |
| { |
| QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW; |
| |
| if (k >= m->size1) |
| { |
| GSL_ERROR_VAL ("subdiagonal index is out of range", GSL_EINVAL, view); |
| } |
| |
| { |
| TYPE(gsl_vector) v = NULL_VECTOR; |
| |
| v.data = m->data + k * MULTIPLICITY * m->tda; |
| v.size = GSL_MIN(m->size1 - k, m->size2); |
| v.stride = m->tda + 1; |
| v.block = m->block; |
| v.owner = 0; |
| |
| view.vector = v; |
| return view; |
| } |
| } |
| |
| QUALIFIED_VIEW(_gsl_vector,view) |
| FUNCTION (gsl_matrix, superdiagonal) (QUALIFIED_TYPE(gsl_matrix) * m, |
| const size_t k) |
| { |
| QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW; |
| |
| |
| if (k >= m->size2) |
| { |
| GSL_ERROR_VAL ("column index is out of range", GSL_EINVAL, view); |
| } |
| |
| { |
| TYPE(gsl_vector) v = NULL_VECTOR; |
| |
| v.data = m->data + k * MULTIPLICITY; |
| v.size = GSL_MIN(m->size1, m->size2 - k); |
| v.stride = m->tda + 1; |
| v.block = m->block; |
| v.owner = 0; |
| |
| view.vector = v; |
| return view; |
| } |
| } |
| |