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Annotation of 40BSD/lib/libF77/pow_zz.c, revision 1.1.1.1

1.1       root        1: #include "complex"
                      2: 
                      3: pow_zz(r,a,b)
                      4: dcomplex *r, *a, *b;
                      5: {
                      6: double logr, logi, x, y;
                      7: double log(), exp(), cos(), sin(), atan2(), cabs();
                      8: 
                      9: logr = log( cabs(a->dreal, a->dimag) );
                     10: logi = atan2(a->dimag, a->dreal);
                     11: 
                     12: x = exp( logr * b->dreal - logi * b->dimag );
                     13: y = logr * b->dimag + logi * b->dreal;
                     14: 
                     15: r->dreal = x * cos(y);
                     16: r->dimag = x * sin(y);
                     17: }

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