diff options
author | Andrew Tridgell <tridge@samba.org> | 2013-04-17 21:19:19 +1000 |
---|---|---|
committer | Andrew Tridgell <tridge@samba.org> | 2013-05-04 19:17:15 +1000 |
commit | b06098a5406cf3269a313362b43d7f47b160933b (patch) | |
tree | 2f3955657fb0e69a56642fa192d470589b1b431b /nuttx/libc/stdio/lib_libdtoa.c | |
parent | a627f6c0eba3cfb0471b0ff88652d85c6d7cb0ca (diff) | |
download | px4-firmware-b06098a5406cf3269a313362b43d7f47b160933b.tar.gz px4-firmware-b06098a5406cf3269a313362b43d7f47b160933b.tar.bz2 px4-firmware-b06098a5406cf3269a313362b43d7f47b160933b.zip |
libdtoa: fixed handling of NaN and Infinity
otherwise we print thousands of 00000 characters
Diffstat (limited to 'nuttx/libc/stdio/lib_libdtoa.c')
-rw-r--r-- | nuttx/libc/stdio/lib_libdtoa.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/nuttx/libc/stdio/lib_libdtoa.c b/nuttx/libc/stdio/lib_libdtoa.c index 29f61fd76..84e3ee50b 100644 --- a/nuttx/libc/stdio/lib_libdtoa.c +++ b/nuttx/libc/stdio/lib_libdtoa.c @@ -43,6 +43,7 @@ /**************************************************************************** * Included Files ****************************************************************************/ +#include <math.h> /**************************************************************************** * Pre-processor Definitions @@ -104,6 +105,13 @@ static void zeroes(FAR struct lib_outstream_s *obj, int nzeroes) * Private Functions ****************************************************************************/ +static void lib_dtoa_string(FAR struct lib_outstream_s *obj, const char *str) +{ + while (*str) { + obj->put(obj, *str++); + } +} + /**************************************************************************** * Name: lib_dtoa * @@ -138,8 +146,21 @@ static void lib_dtoa(FAR struct lib_outstream_s *obj, int fmt, int prec, int dsgn; /* Unused sign indicator */ int i; - /* Non-zero... positive or negative */ + /* special handling for NaN and Infinity */ + if (isnan(value)) { + lib_dtoa_string(obj, "NaN"); + return; + } + if (isinf(value)) { + if (value < 0.0d) { + obj->put(obj, '-'); + } + lib_dtoa_string(obj, "Infinity"); + return; + } + /* Non-zero... positive or negative */ + if (value < 0) { value = -value; |