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- /* specfunc/result.c
- *
- * Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman
- *
- * 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.
- */
- /* Author: G. Jungman */
- #include "gsl__config.h"
- #include "gsl_math.h"
- #include "gsl_errno.h"
- #include "gsl_sf_exp.h"
- #include "gsl_sf_result.h"
- int
- gsl_sf_result_smash_e(const gsl_sf_result_e10 * re, gsl_sf_result * r)
- {
- if(re->e10 == 0) {
- /* nothing to smash */
- r->val = re->val;
- r->err = re->err;
- return GSL_SUCCESS;
- }
- else {
- const double av = fabs(re->val);
- const double ae = fabs(re->err);
- if( GSL_SQRT_DBL_MIN < av && av < GSL_SQRT_DBL_MAX
- && GSL_SQRT_DBL_MIN < ae && ae < GSL_SQRT_DBL_MAX
- && 0.49*GSL_LOG_DBL_MIN < re->e10 && re->e10 < 0.49*GSL_LOG_DBL_MAX
- ) {
- const double scale = exp(re->e10 * M_LN10);
- r->val = re->val * scale;
- r->err = re->err * scale;
- return GSL_SUCCESS;
- }
- else {
- return gsl_sf_exp_mult_err_e(re->e10*M_LN10, 0.0, re->val, re->err, r);
- }
- }
- /*
- int stat_v;
- int stat_e;
- if(re->val == 0.0) {
- r->val = 0.0;
- stat_v = GSL_SUCCESS;
- }
- else {
- gsl_sf_result r_val;
- const double s = GSL_SIGN(re->val);
- const double x_v = re->e10*M_LN10 + log(fabs(re->val));
- stat_v = gsl_sf_exp_e(x_v, &r_val);
- r->val = s * r_val.val;
- }
- if(re->err == 0.0) {
- r->err = 0.0;
- stat_e = GSL_SUCCESS;
- }
- else if(re->val != 0.0) {
- r->err = fabs(r->val * re->err/re->val);
- stat_e = GSL_SUCCESS;
- }
- else {
- gsl_sf_result r_err;
- const double x_e = re->e10*M_LN10 + log(fabs(re->err));
- stat_e = gsl_sf_exp_e(x_e, &r_err);
- r->err = r_err.val;
- }
- return GSL_ERROR_SELECT_2(stat_v, stat_e);
- */
- }
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