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- /* ieee-utils/gsl_ieee_utils.h
- *
- * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 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.
- */
- #ifndef __GSL_IEEE_UTILS_H__
- #define __GSL_IEEE_UTILS_H__
- #include <stdio.h>
- #undef __BEGIN_DECLS
- #undef __END_DECLS
- #ifdef __cplusplus
- # define __BEGIN_DECLS extern "C" {
- # define __END_DECLS }
- #else
- # define __BEGIN_DECLS /* empty */
- # define __END_DECLS /* empty */
- #endif
- __BEGIN_DECLS
- enum {
- GSL_IEEE_TYPE_NAN = 1,
- GSL_IEEE_TYPE_INF = 2,
- GSL_IEEE_TYPE_NORMAL = 3,
- GSL_IEEE_TYPE_DENORMAL = 4,
- GSL_IEEE_TYPE_ZERO = 5
- } ;
- typedef struct {
- int sign ;
- char mantissa[24] ; /* Actual bits are 0..22, element 23 is \0 */
- int exponent ;
- int type ;
- } gsl_ieee_float_rep ;
- typedef struct {
- int sign ;
- char mantissa[53] ; /* Actual bits are 0..51, element 52 is \0 */
- int exponent ;
- int type ;
- } gsl_ieee_double_rep ;
- void gsl_ieee_printf_float (const float * x) ;
- void gsl_ieee_printf_double (const double * x) ;
- void gsl_ieee_fprintf_float (FILE * stream, const float * x) ;
- void gsl_ieee_fprintf_double (FILE * stream, const double * x) ;
- void gsl_ieee_float_to_rep (const float * x, gsl_ieee_float_rep * r) ;
- void gsl_ieee_double_to_rep (const double * x, gsl_ieee_double_rep * r) ;
- enum {
- GSL_IEEE_SINGLE_PRECISION = 1,
- GSL_IEEE_DOUBLE_PRECISION = 2,
- GSL_IEEE_EXTENDED_PRECISION = 3
- } ;
- enum {
- GSL_IEEE_ROUND_TO_NEAREST = 1,
- GSL_IEEE_ROUND_DOWN = 2,
- GSL_IEEE_ROUND_UP = 3,
- GSL_IEEE_ROUND_TO_ZERO = 4
- } ;
- enum {
- GSL_IEEE_MASK_INVALID = 1,
- GSL_IEEE_MASK_DENORMALIZED = 2,
- GSL_IEEE_MASK_DIVISION_BY_ZERO = 4,
- GSL_IEEE_MASK_OVERFLOW = 8,
- GSL_IEEE_MASK_UNDERFLOW = 16,
- GSL_IEEE_MASK_ALL = 31,
- GSL_IEEE_TRAP_INEXACT = 32
- } ;
- void gsl_ieee_env_setup (void) ;
- int gsl_ieee_read_mode_string (const char * description, int * precision,
- int * rounding, int * exception_mask) ;
- int gsl_ieee_set_mode (int precision, int rounding, int exception_mask) ;
- __END_DECLS
- #endif /* __GSL_IEEE_UTILS_H__ */
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