diff options
Diffstat (limited to 'nuttx/lib/math/lib_atan2.c')
| -rw-r--r-- | nuttx/lib/math/lib_atan2.c | 172 |
1 files changed, 69 insertions, 103 deletions
diff --git a/nuttx/lib/math/lib_atan2.c b/nuttx/lib/math/lib_atan2.c index b4ded0c16..bfb33657c 100644 --- a/nuttx/lib/math/lib_atan2.c +++ b/nuttx/lib/math/lib_atan2.c @@ -1,5 +1,15 @@ -/* - * Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com> +/************************************************************************ + * lib/math/lib_atan2.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 * purpose with or without fee is hereby granted, provided that the above @@ -12,109 +22,65 @@ * 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. - */ + * + ************************************************************************/ -#include <apps/math.h> -#include <float.h> +/************************************************************************ + * Included Files + ************************************************************************/ -float atan2f(float y, float x) { - - if (y == 0.0) { - if (x >= 0.0) { - return 0.0; - } - else { - return M_PI; - } - } - else if (y > 0.0) { - if (x == 0.0) { - return M_PI_2; - } - else if (x > 0.0) { - return atanf(y / x); - } - else { - return M_PI - atanf(y / x); - } - } - else { - if (x == 0.0) { - return M_PI + M_PI_2; - } - else if (x > 0.0) { - return 2 * M_PI - atanf(y / x); - } - else { - return M_PI + atanf(y / x); - } - } -} +#include <nuttx/config.h> +#include <nuttx/compiler.h> -double atan2(double y, double x) { - - if (y == 0.0) { - if (x >= 0.0) { - return 0.0; - } - else { - return M_PI; - } - } - else if (y > 0.0) { - if (x == 0.0) { - return M_PI_2; - } - else if (x > 0.0) { - return atan(y / x); - } - else { - return M_PI - atan(y / x); - } - } - else { - if (x == 0.0) { - return M_PI + M_PI_2; - } - else if (x > 0.0) { - return 2 * M_PI - atan(y / x); - } - else { - return M_PI + atan(y / x); - } - } -} +#include <math.h> + +/************************************************************************ + * Public Functions + ************************************************************************/ -long double atan2l(long double y, long double x) { - - if (y == 0.0) { - if (x >= 0.0) { - return 0.0; - } - else { - return M_PI; - } - } - else if (y > 0.0) { - if (x == 0.0) { - return M_PI_2; - } - else if (x > 0.0) { - return atanl(y / x); - } - else { - return M_PI - atanl(y / x); - } - } - else { - if (x == 0.0) { - return M_PI + M_PI_2; - } - else if (x > 0.0) { - return 2 * M_PI - atanl(y / x); - } - else { - return M_PI + atanl(y / x); - } - } +#if CONFIG_HAVE_DOUBLE +double atan2(double y, double x) +{ + if (y == 0.0) + { + if (x >= 0.0) + { + return 0.0; + } + else + { + return M_PI; + } + } + else if (y > 0.0) + { + if (x == 0.0) + { + return M_PI_2; + } + else if (x > 0.0) + { + return atan(y / x); + } + else + { + return M_PI - atan(y / x); + } + } + else + { + if (x == 0.0) + { + return M_PI + M_PI_2; + } + else if (x > 0.0) + { + return 2 * M_PI - atan(y / x); + } + else + { + return M_PI + atan(y / x); + } + } } +#endif |