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C/C++ Users Group Library 1996 July
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C-C++ Users Group Library July 1996.iso
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v_09_05
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9n05051a
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1991-03-05
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/* COMPLEX.H header file
* use for complex arithmetic in C
* see MULLER.C for support functions such as
csqrt(),clog(),cexp(),argmt(),polarxy()
from C Tools for Scientists and Engineers by L. Baker
*/
struct complex { double x;
double y;} ;
static double TP,T2,T3;/* dummy*/
double sqrt();
/* for below, X,Y are complex structures, and one is returned*/
#define CMULTR(X,Y) ((X).x*(Y).x-(X).y*(Y).y)
#define CMULTI(X,Y) ((X).y*(Y).x+(X).x *(Y).y)
/*
#define CMLT(Z,X,Y) {TP=(X.x+Y.x)*(X.y+Y.y);T2=X.x*Y.x;\
T3=X.y*Y.y;Z.y=TP-T2-T3;z.X=T2-T3;}
*/
#define CDRN(X,Y) ((X).x*(Y).x+(Y).y*(X).y)
#define CDIN(X,Y) ((X).y*(Y).x-(X).x*(Y).y)
#define CNORM(X) ((X).x*(X).x+(X).y*(X).y)
#define CDIV(z,nu,de) {TP=CNORM(de);z.x=CDRN(nu,de)/TP;\
z.y=CDIN(nu,de)/TP;}
#define CONJG(z,X) {(z).x=(X).x;(z).y=-(X).y;}
#define CMULT(z,X,Y) {(z).x=CMULTR((X),(Y)); (z).y=CMULTI((X),(Y));}
#define CADD(z,X,Y) {(z).x=(X).x+(Y).x;(z).y=(X).y+(Y).y;}
#define CSUB(z,X,Y) {(z).x=(X).x-(Y).x;(z).y=(X).y-(Y).y;}
#define CLET(to,from) {(to).x=(from).x;(to).y=(from).y;}
#define cabs(X) sqrt((X).y*(X).y+(X).x*(X).x)
#define CMPLX(X,real,imag) {(X).x=(real);(X).y=(imag);}
#define CASSN(to,from) {to.x=from->x;to.y=from->y;}
#define CTREAL(z,X,real) {(z).x=(X).x*(real);(z).y=(X).y*(real);}
#define CSET(to,from) {to->x=(from).x;to->y=(from).y;}