Rework the floating point code in printf(). Significant changes:

- We used to round long double arguments to double.  Now we print
  them properly.

- Bugs involving '%F', corner cases of '#' and 'g' format
  specifiers, and the '.*' precision specifier have been
  fixed.

- Added support for the "'" specifier to print thousands' grouping
  characters in a locale-dependent manner.

- Implement the __vfprintf() side of hexadecimal floating point
  support.  All that is still needed is a routine to convert the
  mantissa to hex digits one nibble at a time in the style of ultoa().

Reviewed by:	silence on standards@

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/libc/stdio/floatio.h b/lib/libc/stdio/floatio.h
index 22fedcd..500cda2 100644
--- a/lib/libc/stdio/floatio.h
+++ b/lib/libc/stdio/floatio.h
@@ -52,3 +52,5 @@
 #if LDBL_MAX_EXP > 999999
 #error "floating point buffers too small"
 #endif
+
+char *__ldtoa(long double *, int, int, int *, int *, char **);