1998-02-01 09:37:08 +08:00
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#include "f2c.h"
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#ifdef KR_headers
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double log(), f__cabs(), atan2();
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1999-05-03 16:33:21 +08:00
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VOID z_log(r, z) doublecomplex *r, *z;
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1998-02-01 09:37:08 +08:00
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#else
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#undef abs
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1999-05-03 16:33:21 +08:00
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#include "math.h"
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1998-02-01 09:37:08 +08:00
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extern double f__cabs(double, double);
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1999-05-03 16:33:21 +08:00
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void z_log(doublecomplex *r, doublecomplex *z)
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1998-02-01 09:37:08 +08:00
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#endif
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{
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1999-05-03 16:33:21 +08:00
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double zi = z->i;
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r->i = atan2(zi, z->r);
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r->r = log( f__cabs( z->r, zi ) );
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}
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