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/* mpfr_out_str -- output a floating-point number to a stream
Copyright (C) 1999 PolKA project, Inria Lorraine and Loria
This file is part of the MPFR Library.
The MPFR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
The MPFR Library 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 Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with the MPFR Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include <stdio.h>
#include <math.h>
#include "gmp.h"
#include "gmp-impl.h"
#include "mpfr.h"
size_t
#if __STDC__
mpfr_out_str (FILE *stream, int base, size_t n_digits, mpfr_srcptr op,
mp_rnd_t rnd_mode)
#else
mpfr_out_str (stream, base, n_digits, op, rnd_mode)
FILE *stream;
int base;
size_t n_digits;
mpfr_srcptr op;
mp_rnd_t rnd_mode;
#endif
{
char *s,*s0; size_t l; mp_exp_t e;
if (FLAG_NAN(op)) { fprintf(stream, "NaN"); return 3; }
if (!NOTZERO(op)) { fprintf(stream, "0"); return 1; }
s = mpfr_get_str(NULL, &e, base, n_digits, op, rnd_mode);
s0 = s;
/* for op=3.1416 we have s = "31416" and e = 1 */
l = strlen(s)+1;
if (*s == '-') fputc(*s++, stream);
fputc(*s++, stream); e--; /* writes leading digit */
fputc('.', stream); /* decimal point */
fputs(s, stream); /* rest of mantissa */
if (e) {
fputc((base>10) ? '@' : 'e', stream); l++;
sprintf(s, "%ld", e);
l += strlen(s);
fprintf(stream, "%s", s);
}
(*_mp_free_func)(s0, l);
return l;
}
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