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/* ieee-utils/print.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.
*/
#include <config.h>
#include <stdio.h>
#include <math.h>
#include <gsl/gsl_ieee_utils.h>
/* A table of sign characters, 0=positive, 1=negative. We print a space
instead of a unary + sign for compatibility with bc */
static char signs[2]={' ','-'} ;
void
gsl_ieee_fprintf_float (FILE * stream, const float * x) {
gsl_ieee_float_rep r ;
gsl_ieee_float_to_rep(x, &r) ;
switch (r.type)
{
case GSL_IEEE_TYPE_NAN:
fprintf(stream, "NaN") ;
break ;
case GSL_IEEE_TYPE_INF:
fprintf(stream, "%cInf", signs[r.sign]) ;
break ;
case GSL_IEEE_TYPE_NORMAL:
fprintf(stream, "%c1.%s*2^%d", signs[r.sign], r.mantissa, r.exponent) ;
break ;
case GSL_IEEE_TYPE_DENORMAL:
fprintf(stream, "%c0.%s*2^%d", signs[r.sign], r.mantissa, r.exponent + 1) ;
break ;
case GSL_IEEE_TYPE_ZERO:
fprintf(stream, "%c0", signs[r.sign]) ;
break ;
default:
fprintf(stream, "[non-standard IEEE float]") ;
}
}
void
gsl_ieee_printf_float (const float * x)
{
gsl_ieee_fprintf_float (stdout,x);
}
void
gsl_ieee_fprintf_double (FILE * stream, const double * x) {
gsl_ieee_double_rep r ;
gsl_ieee_double_to_rep (x, &r) ;
switch (r.type)
{
case GSL_IEEE_TYPE_NAN:
fprintf(stream, "NaN") ;
break ;
case GSL_IEEE_TYPE_INF:
fprintf(stream, "%cInf", signs[r.sign]) ;
break ;
case GSL_IEEE_TYPE_NORMAL:
fprintf(stream, "%c1.%s*2^%d", signs[r.sign], r.mantissa, r.exponent) ;
break ;
case GSL_IEEE_TYPE_DENORMAL:
fprintf(stream, "%c0.%s*2^%d", signs[r.sign], r.mantissa, r.exponent + 1) ;
break ;
case GSL_IEEE_TYPE_ZERO:
fprintf(stream, "%c0", signs[r.sign]) ;
break ;
default:
fprintf(stream, "[non-standard IEEE double]") ;
}
}
void
gsl_ieee_printf_double (const double * x)
{
gsl_ieee_fprintf_double (stdout,x);
}
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