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/* matrix/rowcol_source.c
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*
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* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 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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QUALIFIED_VIEW(_gsl_vector,view)
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FUNCTION (gsl_matrix, row) (QUALIFIED_TYPE(gsl_matrix) * m, const size_t i)
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{
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QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
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if (i >= m->size1)
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{
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GSL_ERROR_VAL ("row index is out of range", GSL_EINVAL, view);
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}
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{
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TYPE(gsl_vector) v = NULL_VECTOR;
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v.data = m->data + i * MULTIPLICITY * m->tda;
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v.size = m->size2;
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v.stride = 1;
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v.block = m->block;
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v.owner = 0;
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view.vector = v;
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return view;
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}
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}
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QUALIFIED_VIEW(_gsl_vector,view)
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FUNCTION (gsl_matrix, column) (QUALIFIED_TYPE(gsl_matrix) * m, const size_t j)
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{
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QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
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if (j >= m->size2)
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{
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GSL_ERROR_VAL ("column index is out of range", GSL_EINVAL, view);
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}
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{
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TYPE(gsl_vector) v = NULL_VECTOR;
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v.data = m->data + j * MULTIPLICITY;
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v.size = m->size1;
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v.stride = m->tda;
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v.block = m->block;
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v.owner = 0;
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view.vector = v;
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return view;
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}
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}
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QUALIFIED_VIEW(_gsl_vector,view)
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FUNCTION (gsl_matrix, diagonal) (QUALIFIED_TYPE(gsl_matrix) * m)
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{
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QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
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TYPE(gsl_vector) v = NULL_VECTOR;
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v.data = m->data;
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v.size = GSL_MIN(m->size1,m->size2);
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v.stride = m->tda + 1;
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v.block = m->block;
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v.owner = 0;
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view.vector = v;
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return view;
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}
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QUALIFIED_VIEW(_gsl_vector,view)
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FUNCTION (gsl_matrix, subdiagonal) (QUALIFIED_TYPE(gsl_matrix) * m,
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const size_t k)
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{
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QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
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if (k >= m->size1)
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{
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GSL_ERROR_VAL ("subdiagonal index is out of range", GSL_EINVAL, view);
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}
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{
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TYPE(gsl_vector) v = NULL_VECTOR;
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v.data = m->data + k * MULTIPLICITY * m->tda;
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v.size = GSL_MIN(m->size1 - k, m->size2);
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v.stride = m->tda + 1;
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v.block = m->block;
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v.owner = 0;
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view.vector = v;
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return view;
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}
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}
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QUALIFIED_VIEW(_gsl_vector,view)
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FUNCTION (gsl_matrix, superdiagonal) (QUALIFIED_TYPE(gsl_matrix) * m,
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const size_t k)
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{
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QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
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if (k >= m->size2)
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{
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GSL_ERROR_VAL ("column index is out of range", GSL_EINVAL, view);
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}
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{
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TYPE(gsl_vector) v = NULL_VECTOR;
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v.data = m->data + k * MULTIPLICITY;
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v.size = GSL_MIN(m->size1, m->size2 - k);
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v.stride = m->tda + 1;
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v.block = m->block;
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v.owner = 0;
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view.vector = v;
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return view;
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}
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}
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QUALIFIED_VIEW(_gsl_vector,view)
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FUNCTION (gsl_matrix, subrow) (QUALIFIED_TYPE(gsl_matrix) * m, const size_t i, const size_t offset, const size_t n)
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{
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QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
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if (i >= m->size1)
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{
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GSL_ERROR_VAL ("row index is out of range", GSL_EINVAL, view);
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}
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else if (n == 0)
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{
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GSL_ERROR_VAL ("vector length n must be positive integer",
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GSL_EINVAL, view);
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}
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else if (offset + n > m->size2)
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{
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GSL_ERROR_VAL ("dimension n overflows matrix", GSL_EINVAL, view);
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}
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{
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TYPE(gsl_vector) v = NULL_VECTOR;
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v.data = m->data + MULTIPLICITY * (i * m->tda + offset);
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v.size = n;
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v.stride = 1;
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v.block = m->block;
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v.owner = 0;
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view.vector = v;
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return view;
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}
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}
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QUALIFIED_VIEW(_gsl_vector,view)
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FUNCTION (gsl_matrix, subcolumn) (QUALIFIED_TYPE(gsl_matrix) * m, const size_t j, const size_t offset, const size_t n)
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{
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QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
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if (j >= m->size2)
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{
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GSL_ERROR_VAL ("column index is out of range", GSL_EINVAL, view);
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}
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else if (n == 0)
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{
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GSL_ERROR_VAL ("vector length n must be positive integer",
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GSL_EINVAL, view);
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}
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else if (offset + n > m->size1)
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{
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GSL_ERROR_VAL ("dimension n overflows matrix", GSL_EINVAL, view);
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}
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{
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TYPE(gsl_vector) v = NULL_VECTOR;
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v.data = m->data + MULTIPLICITY * (offset * m->tda + j);
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v.size = n;
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v.stride = m->tda;
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v.block = m->block;
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v.owner = 0;
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view.vector = v;
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return view;
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}
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}
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