| /* integration/qpsrt2.c |
| * |
| * Copyright (C) 1996, 1997, 1998, 1999, 2000 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. |
| */ |
| |
| /* The smallest interval has the largest error. Before bisecting |
| decrease the sum of the errors over the larger intervals |
| (error_over_large_intervals) and perform extrapolation. */ |
| |
| static int |
| increase_nrmax (gsl_integration_workspace * workspace); |
| |
| static int |
| increase_nrmax (gsl_integration_workspace * workspace) |
| { |
| int k; |
| int id = workspace->nrmax; |
| int jupbnd; |
| |
| const size_t * level = workspace->level; |
| const size_t * order = workspace->order; |
| |
| size_t limit = workspace->limit ; |
| size_t last = workspace->size - 1 ; |
| |
| if (last > (1 + limit / 2)) |
| { |
| jupbnd = limit + 1 - last; |
| } |
| else |
| { |
| jupbnd = last; |
| } |
| |
| for (k = id; k <= jupbnd; k++) |
| { |
| size_t i_max = order[workspace->nrmax]; |
| |
| workspace->i = i_max ; |
| |
| if (level[i_max] < workspace->maximum_level) |
| { |
| return 1; |
| } |
| |
| workspace->nrmax++; |
| |
| } |
| return 0; |
| } |
| |
| static int |
| large_interval (gsl_integration_workspace * workspace) |
| { |
| size_t i = workspace->i ; |
| const size_t * level = workspace->level; |
| |
| if (level[i] < workspace->maximum_level) |
| { |
| return 1 ; |
| } |
| else |
| { |
| return 0 ; |
| } |
| } |
| |