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complex_jz.cpp
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complex_jz.cpp
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/***** complex_jz.cpp *****/
#include <complex_jz.h>
/**
* Includes all the necessary methods to manipulate complex numbers for the FFT.
*
* Would probably be nicer as an object with overloaded operators. Oh well.
*/
/**
* complexMultiply - Multiply two complex numbers
*/
Complex complexMultiply(Complex a, Complex b) {
Complex c;
c.re = (a.re*b.re) - (a.im*b.im);
c.im = (a.re*b.im) + (a.im*b.re);
return c;
}
/**
* complexAdd - Add two complex numbers
*/
Complex complexAdd(Complex a, Complex b) {
Complex c;
c.re = a.re + b.re;
c.im = a.im + b.im;
return c;
}
/**
* complexSubtract - Subtract a complex number (b) from another (a)
*/
Complex complexSubtract(Complex a, Complex b) {
Complex c;
c.re = a.re-b.re;
c.im = a.im-b.im;
return c;
}
/**
* calculateNegativeComplex - Finds the negative of a complex number struct
*/
Complex calculateNegativeComplex(Complex a) {
Complex b;
b.re = -a.re;
b.im = -a.im;
return b;
}