/* ieee-utils/print.c

 * 

 * 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.

 */

#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);

}