version 1.1, 2000/09/09 14:12:19 |
version 1.1.1.2, 2003/08/25 16:06:07 |
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/* mpfr_out_str -- output a floating-point number to a stream |
/* mpfr_out_str -- output a floating-point number to a stream |
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Copyright (C) 1999 PolKA project, Inria Lorraine and Loria |
Copyright 1999, 2001 Free Software Foundation, Inc. |
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This file is part of the MPFR Library. |
This file is part of the MPFR Library. |
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The MPFR Library is free software; you can redistribute it and/or modify |
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 |
it under the terms of the GNU Lesser General Public License as published by |
the Free Software Foundation; either version 2 of the License, or (at your |
the Free Software Foundation; either version 2.1 of the License, or (at your |
option) any later version. |
option) any later version. |
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The MPFR Library is distributed in the hope that it will be useful, but |
The MPFR Library is distributed in the hope that it will be useful, but |
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public |
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
License for more details. |
License for more details. |
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You should have received a copy of the GNU Library General Public License |
You should have received a copy of the GNU Lesser General Public License |
along with the MPFR Library; see the file COPYING.LIB. If not, write to |
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, |
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
MA 02111-1307, USA. */ |
MA 02111-1307, USA. */ |
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#include <stdio.h> |
#include <stdio.h> |
#include <math.h> |
#include <string.h> |
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#include <limits.h> |
#include "gmp.h" |
#include "gmp.h" |
#include "gmp-impl.h" |
#include "gmp-impl.h" |
#include "mpfr.h" |
#include "mpfr.h" |
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#include "mpfr-impl.h" |
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size_t |
size_t |
#if __STDC__ |
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mpfr_out_str (FILE *stream, int base, size_t n_digits, mpfr_srcptr op, |
mpfr_out_str (FILE *stream, int base, size_t n_digits, mpfr_srcptr op, |
unsigned char rnd_mode) |
mp_rnd_t rnd_mode) |
#else |
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mpfr_out_str (stream, base, n_digits, op, rnd_mode) |
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FILE *stream; |
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int base; |
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size_t n_digits; |
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mpfr_srcptr op; |
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unsigned char rnd_mode; |
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#endif |
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{ |
{ |
char *s,*s0; size_t l; mp_exp_t e; |
char *s, *s0; |
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size_t l; |
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mp_exp_t e; |
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if (FLAG_NAN(op)) { fprintf(stream, "NaN"); return 3; } |
if (MPFR_IS_NAN(op)) |
if (!NOTZERO(op)) { fprintf(stream, "0"); return 1; } |
{ |
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fprintf (stream, "NaN"); |
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return 3; |
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} |
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s = mpfr_get_str(NULL, &e, base, n_digits, op, rnd_mode); |
if (MPFR_IS_INF(op)) |
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{ |
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if (MPFR_SIGN(op) > 0) |
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{ |
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fprintf (stream, "Inf"); |
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return 3; |
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} |
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else |
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{ |
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fprintf (stream, "-Inf"); |
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return 4; |
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} |
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} |
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if (MPFR_IS_ZERO(op)) |
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{ |
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if (MPFR_SIGN(op) > 0) |
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{ |
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fprintf(stream, "0"); |
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return 1; |
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} |
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else |
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{ |
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fprintf(stream, "-0"); |
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return 2; |
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} |
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} |
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s = mpfr_get_str (NULL, &e, base, n_digits, op, rnd_mode); |
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s0 = s; |
s0 = s; |
/* for op=3.1416 we have s = "31416" and e = 1 */ |
/* for op=3.1416 we have s = "31416" and e = 1 */ |
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l = strlen(s)+1; |
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if (*s == '-') fputc(*s++, stream); |
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fputc(*s++, stream); e--; /* writes leading digit */ |
l = strlen (s) + 1; /* size of allocated block returned by mpfr_get_str |
fputc('.', stream); /* decimal point */ |
- may be incorrect, as only an upper bound? */ |
fputs(s, stream); /* rest of mantissa */ |
if (*s == '-') |
if (e) { |
fputc (*s++, stream); |
fputc((base>10) ? '@' : 'e', stream); l++; |
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sprintf(s, "%ld", e); |
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l += strlen(s); |
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fprintf(stream, "%s", s); |
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} |
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(*_mp_free_func)(s0, l); |
/* outputs mantissa */ |
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fputc (*s++, stream); e--; /* leading digit */ |
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fputc ('.', stream); /* decimal point */ |
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fputs (s, stream); /* rest of mantissa */ |
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(*__gmp_free_func) (s0, l); |
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/* outputs exponent */ |
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if (e) |
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{ |
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MPFR_ASSERTN(e >= LONG_MIN); |
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MPFR_ASSERTN(e <= LONG_MAX); |
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l += fprintf (stream, (base <= 10 ? "e%ld" : "@%ld"), (long) e); |
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} |
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return l; |
return l; |
} |
} |