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/* mpf_out_str (stream, base, n_digits, op) -- Print N_DIGITS digits from
the float OP to STREAM in base BASE. Return the number of characters
written, or 0 if an error occurred.
Copyright (C) 1996 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP 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 GNU MP 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 GNU MP 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 "gmp.h"
#include "gmp-impl.h"
size_t
#if __STDC__
mpf_out_str (FILE *stream, int base, size_t n_digits, mpf_srcptr op)
#else
mpf_out_str (stream, base, n_digits, op)
FILE *stream;
int base;
size_t n_digits;
mpf_srcptr op;
#endif
{
char *str;
mp_exp_t exp;
size_t written;
TMP_DECL (marker);
TMP_MARK (marker);
if (base == 0)
base = 10;
if (n_digits == 0)
n_digits = (((op->_mp_prec - 1) * BITS_PER_MP_LIMB)
* __mp_bases[base].chars_per_bit_exactly);
if (stream == 0)
stream = stdout;
str = (char *) TMP_ALLOC (n_digits + 2); /* extra for minus sign and \0 */
mpf_get_str (str, &exp, base, n_digits, op);
n_digits = strlen (str);
written = 0;
/* Write sign */
if (str[0] == '-')
{
str++;
fputc ('-', stream);
written = 1;
}
fwrite ("0.", 1, 2, stream);
written += 2;
/* Write mantissa */
{
size_t fwret;
fwret = fwrite (str, 1, n_digits, stream);
written += fwret;
}
/* Write exponent */
{
int fpret;
fpret = fprintf (stream, (base <= 10 ? "e%ld" : "@%ld"), exp);
written += fpret;
}
TMP_FREE (marker);
return ferror (stream) ? 0 : written;
}
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