40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/**********
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Copyright 1990 Regents of the University of California. All rights reserved.
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Author: 1989 Jaijeet S. Roychowdhury
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**********/
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#include "ngspice/ngspice.h"
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#include "ngspice/distodef.h"
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#include "ngspice/suffix.h"
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/*
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* TimesDeriv computes the partial derivatives of the x*k
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* function where the argument to the function is itself a
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* function of three variables p, q, and r. k is a constant.
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*/
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void
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TimesDeriv(Dderivs *new, Dderivs *old, double k)
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{
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new->value = k* old->value;
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new->d1_p = k*old->d1_p;
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new->d1_q = k*old->d1_q;
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new->d1_r = k*old->d1_r;
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new->d2_p2 = k*old->d2_p2;
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new->d2_q2 = k*old->d2_q2;
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new->d2_r2 = k*old->d2_r2;
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new->d2_pq = k*old->d2_pq;
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new->d2_qr = k*old->d2_qr;
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new->d2_pr = k*old->d2_pr;
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new->d3_p3 = k*old->d3_p3;
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new->d3_q3 = k*old->d3_q3;
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new->d3_r3 = k*old->d3_r3;
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new->d3_p2r = k*old->d3_p2r;
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new->d3_p2q = k*old->d3_p2q;
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new->d3_q2r = k*old->d3_q2r;
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new->d3_pq2 = k*old->d3_pq2;
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new->d3_pr2 = k*old->d3_pr2;
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new->d3_qr2 = k*old->d3_qr2;
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new->d3_pqr = k*old->d3_pqr;
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}
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