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Annotation of 41BSD/lib/libF77/pow_zz.c, revision 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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