diff options
Diffstat (limited to 'nuttx/lib/math/lib_modf.c')
-rw-r--r-- | nuttx/lib/math/lib_modf.c | 87 |
1 files changed, 40 insertions, 47 deletions
diff --git a/nuttx/lib/math/lib_modf.c b/nuttx/lib/math/lib_modf.c index 1e6fadc11..3b33cde42 100644 --- a/nuttx/lib/math/lib_modf.c +++ b/nuttx/lib/math/lib_modf.c @@ -1,4 +1,14 @@ -/* +/************************************************************************ + * lib/math/lib_modf.c + * + * This file is a part of NuttX: + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Ported by: Darcy Gong + * + * It derives from the Rhombs OS math library by Nick Johnson which has + * a compatibile, MIT-style license: + * * Copyright (C) 2009-2011 Nick Johnson <nickbjohnson4224 at gmail.com> * * Permission to use, copy, modify, and distribute this software for any @@ -12,54 +22,37 @@ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ + * + ************************************************************************/ + +/************************************************************************ + * Included Files + ************************************************************************/ -#include <apps/math.h> -#include <float.h> #include <stdint.h> +#include <math.h> -float modff(float x, float *iptr) { - if (fabsf(x) >= 8388608.0) { - *iptr = x; - return 0.0; - } - else if (fabs(x) < 1.0) { - *iptr = 0.0; - return x; - } - else { - *iptr = (float) (int) x; - return (x - *iptr); - } -} +/************************************************************************ + * Public Functions + ************************************************************************/ -double modf(double x, double *iptr) { - if (fabs(x) >= 4503599627370496.0) { - *iptr = x; - return 0.0; - } - else if (fabs(x) < 1.0) { - *iptr = 0.0; - return x; - } - else { - *iptr = (double) (int64_t) x; - return (x - *iptr); - } +#if CONFIG_HAVE_DOUBLE +double modf(double x, double *iptr) +{ + if (fabs(x) >= 4503599627370496.0) + { + *iptr = x; + return 0.0; + } + else if (fabs(x) < 1.0) + { + *iptr = 0.0; + return x; + } + else + { + *iptr = (double)(int64_t) x; + return (x - *iptr); + } } - -long double modfl(long double x, long double *iptr) { - if (fabs(x) >= 4503599627370496.0) { - *iptr = x; - return 0.0; - } - else if (fabs(x) < 1.0) { - *iptr = 0.0; - return x; - } - else { - *iptr = (long double) (int64_t) x; - return (x - *iptr); - } -} - +#endif |