size_t
mpf_out_str (FILE *stream, int base, size_t n_digits, mpf_srcptr op)
{
char *str;
mp_exp_t exp;
size_t written;
TMP_DECL;
TMP_MARK;
if (base == 0)
base = 10;
if (n_digits == 0)
MPF_SIGNIFICANT_DIGITS (n_digits, base, op->_mp_prec);
if (stream == 0)
stream = stdout;
/* Consider these changes:
* Don't allocate memory here for huge n_digits; pass NULL to mpf_get_str.
* Make mpf_get_str allocate extra space when passed NULL, to avoid
allocating two huge string buffers.
* Implement more/other allocation reductions tricks. */
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;
n_digits--;
}
{
const char *point = GMP_DECIMAL_POINT;
size_t pointlen = strlen (point);
putc ('0', stream);
fwrite (point, 1, pointlen, stream);
written += pointlen + 1;
}
/* 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;
return ferror (stream) ? 0 : written;
}
size_t
mpf_out_str (FILE *stream, int base, size_t n_digits, mpf_srcptr op)
{
char *str;
mp_exp_t exp;
size_t written;
TMP_DECL (marker);
TMP_MARK (marker);
if (base == 0)
base = 10;
if (n_digits == 0)
MPF_SIGNIFICANT_DIGITS (n_digits, base, op->_mp_prec);
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;
n_digits--;
}
#if HAVE_LOCALECONV
{
const char *point = localeconv()->decimal_point;
size_t pointlen = strlen (point);
putc ('0', stream);
fwrite (point, 1, pointlen, stream);
written += pointlen + 1;
}
#else
fwrite ("0.", 1, 2, stream);
written += 2;
#endif
/* 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;
}
