| /* ieee-utils/gsl_ieee_utils.h |
| * |
| * 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. |
| */ |
| |
| #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__ */ |
| |