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Last change
on this file since 603 was 2, checked in by bird, 23 years ago |
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Initial revision
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Property cvs2svn:cvs-rev
set to
1.1
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Property svn:eol-style
set to
native
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Property svn:executable
set to
*
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File size:
482 bytes
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| 1 | #include "f2c.h"
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| 2 |
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| 3 | #ifdef KR_headers
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| 4 | double log(), exp(), cos(), sin(), atan2(), f__cabs();
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| 5 | VOID pow_zz(r,a,b) doublecomplex *r, *a, *b;
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| 6 | #else
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| 7 | #undef abs
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| 8 | #include <math.h>
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| 9 | extern double f__cabs(double,double);
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| 10 | void pow_zz(doublecomplex *r, doublecomplex *a, doublecomplex *b)
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| 11 | #endif
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| 12 | {
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| 13 | double logr, logi, x, y;
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| 14 |
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| 15 | logr = log( f__cabs(a->r, a->i) );
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| 16 | logi = atan2(a->i, a->r);
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| 17 |
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| 18 | x = exp( logr * b->r - logi * b->i );
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| 19 | y = logr * b->i + logi * b->r;
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| 20 |
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| 21 | r->r = x * cos(y);
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| 22 | r->i = x * sin(y);
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| 23 | }
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