| Guido van Rossum | 57b1822 | 1996-08-29 18:10:41 +0000 | [diff] [blame] | 1 | /* hypot() replacement */ |
| 2 | |||||
| 3 | #include "config.h" | ||||
| 4 | #include "myproto.h" | ||||
| 5 | #include "mymath.h" | ||||
| 6 | |||||
| Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame^] | 7 | double hypot(double x, double y) |
| Guido van Rossum | 57b1822 | 1996-08-29 18:10:41 +0000 | [diff] [blame] | 8 | { |
| 9 | double yx; | ||||
| 10 | |||||
| 11 | x = fabs(x); | ||||
| 12 | y = fabs(y); | ||||
| 13 | if (x < y) { | ||||
| 14 | double temp = x; | ||||
| 15 | x = y; | ||||
| 16 | y = temp; | ||||
| 17 | } | ||||
| 18 | if (x == 0.) | ||||
| 19 | return 0.; | ||||
| 20 | else { | ||||
| 21 | yx = y/x; | ||||
| 22 | return x*sqrt(1.+yx*yx); | ||||
| 23 | } | ||||
| 24 | } | ||||