| Guido van Rossum | 57b1822 | 1996-08-29 18:10:41 +0000 | [diff] [blame] | 1 | /* hypot() replacement */ |
| 2 | |||||
| Martin v. Löwis | 63bf149 | 2007-11-12 05:14:05 +0000 | [diff] [blame] | 3 | #include "Python.h" |
| Guido van Rossum | 57b1822 | 1996-08-29 18:10:41 +0000 | [diff] [blame] | 4 | |
| Christian Heimes | 4872351 | 2008-01-20 14:28:28 +0000 | [diff] [blame] | 5 | #ifndef HAVE_HYPOT |
| Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 6 | double hypot(double x, double y) |
| Guido van Rossum | 57b1822 | 1996-08-29 18:10:41 +0000 | [diff] [blame] | 7 | { |
| 8 | double yx; | ||||
| 9 | |||||
| 10 | x = fabs(x); | ||||
| 11 | y = fabs(y); | ||||
| 12 | if (x < y) { | ||||
| 13 | double temp = x; | ||||
| 14 | x = y; | ||||
| 15 | y = temp; | ||||
| 16 | } | ||||
| 17 | if (x == 0.) | ||||
| 18 | return 0.; | ||||
| 19 | else { | ||||
| 20 | yx = y/x; | ||||
| 21 | return x*sqrt(1.+yx*yx); | ||||
| 22 | } | ||||
| 23 | } | ||||
| Christian Heimes | 4872351 | 2008-01-20 14:28:28 +0000 | [diff] [blame] | 24 | #endif /* HAVE_HYPOT */ |
| 25 | |||||