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| author | Ulrich Drepper <drepper@redhat.com> | 1999-07-28 22:39:04 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 1999-07-28 22:39:04 +0000 |
| commit | b113c12c350c29a0f7f06fba12f06d86e79de1f4 (patch) | |
| tree | b42569c0a1afb8ea9358239ceecb64834c6c038d /misc/qefgcvt.c | |
| parent | aa847ee5a48c4dc582960b1ee575a82cab005a01 (diff) | |
| download | glibc-b113c12c350c29a0f7f06fba12f06d86e79de1f4.tar.gz glibc-b113c12c350c29a0f7f06fba12f06d86e79de1f4.tar.xz glibc-b113c12c350c29a0f7f06fba12f06d86e79de1f4.zip | |
Update.
1999-07-28 Ulrich Drepper <drepper@cygnus.com> * misc/efgcvt.c: Use IEEE 854 formula to compute the number of digits to print. * misc/efgcvt_r.c: Likewise. * misc/qefgcvt.c: Likewise. * misc/qefgcvt_r.c: Likewise. * misc/tst-efgcvt.c: Remove one test which cannot reliably be run anymore.
Diffstat (limited to 'misc/qefgcvt.c')
| -rw-r--r-- | misc/qefgcvt.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/misc/qefgcvt.c b/misc/qefgcvt.c index af65fc1688..faf788aa5d 100644 --- a/misc/qefgcvt.c +++ b/misc/qefgcvt.c @@ -17,13 +17,20 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +#include <float.h> + #define FLOAT_TYPE long double #define FUNC_PREFIX q #define FLOAT_FMT_FLAG "L" /* Actually we have to write (LDBL_DIG + log10 (LDBL_MAX_10_EXP)) but we don't have log10 available in the preprocessor. Since we cannot assume anything on the used `long double' format be generous. */ -#define MAXDIG (LDBL_DIG + 12) -#define NDIGIT_MAX LDBL_DIG +#define MAXDIG (NDIGIT_MAX + 12) +#if LDBL_MANT_DIG == 64 +# define NDIGIT_MAX 21 +#else +/* See IEEE 854 5.6, table 2 for this formula. */ +# define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * LDBL_MANT_DIG + 1.0))) +#endif #include "efgcvt.c" |