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author | px4dev <px4@purgatory.org> | 2013-01-14 21:01:58 -0800 |
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committer | px4dev <px4@purgatory.org> | 2013-01-14 21:01:58 -0800 |
commit | 854c6436b4e3b292fd04843795d0369dc8856783 (patch) | |
tree | 4d5602f5c70926d2dcd01294561ddd8df4378462 /nuttx/libc/math/lib_round.c | |
parent | 6d138a845aabad31060bd00da0d20d177d3f4be4 (diff) | |
parent | c38ad4ded570eddadeeca3579d02dfc63dcc8a9d (diff) | |
download | px4-firmware-854c6436b4e3b292fd04843795d0369dc8856783.tar.gz px4-firmware-854c6436b4e3b292fd04843795d0369dc8856783.tar.bz2 px4-firmware-854c6436b4e3b292fd04843795d0369dc8856783.zip |
Pull NuttX up to the 6.24 release.
Merge branch 'nuttx-merge-5447'
Diffstat (limited to 'nuttx/libc/math/lib_round.c')
-rw-r--r-- | nuttx/libc/math/lib_round.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/nuttx/libc/math/lib_round.c b/nuttx/libc/math/lib_round.c new file mode 100644 index 000000000..6191cee5b --- /dev/null +++ b/nuttx/libc/math/lib_round.c @@ -0,0 +1,40 @@ +/************************************************************************ + * lib/math/lib_round.c + * + * This file is a part of NuttX: + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * (C) 2012 Petteri Aimonen <jpa@nx.mail.kapsi.fi> + * + ************************************************************************/ + +/************************************************************************ + * Included Files + ************************************************************************/ + +#include <nuttx/config.h> +#include <nuttx/compiler.h> + +#include <math.h> + +/************************************************************************ + * Public Functions + ************************************************************************/ + +#ifdef CONFIG_HAVE_DOUBLE +double round(double x) +{ + double f = modf(x, &x); + if (x <= 0.0 && f <= -0.5) + { + x -= 1.0; + } + + if (x >= 0.0 && f >= 0.5) + { + x += 1.0; + } + + return x; +} +#endif |