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547779a8 WH |
1 | #include "f2c.h" |
2 | ||
3 | #ifdef KR_headers | |
4 | double log(), exp(), cos(), sin(), atan2(), f__cabs(); | |
5 | VOID pow_zz(r,a,b) doublecomplex *r, *a, *b; | |
6 | #else | |
7 | #undef abs | |
8 | #include "math.h" | |
9 | extern double f__cabs(double,double); | |
10 | void pow_zz(doublecomplex *r, doublecomplex *a, doublecomplex *b) | |
11 | #endif | |
12 | { | |
13 | double logr, logi, x, y; | |
14 | ||
15 | logr = log( f__cabs(a->r, a->i) ); | |
16 | logi = atan2(a->i, a->r); | |
17 | ||
18 | x = exp( logr * b->r - logi * b->i ); | |
19 | y = logr * b->i + logi * b->r; | |
20 | ||
21 | r->r = x * cos(y); | |
22 | r->i = x * sin(y); | |
23 | } |