ftecmath.h

spice中支持多层次元件模型仿真的可单独运行的插件源码

/**********
Copyright 1990 Regents of the University of California.  All rights reserved.
Author: 1985 Wayne A. Christopher, U. C. Berkeley CAD Group
**********/

/*
 * Macros for complex mathematical functions.
 */

/* Some defines used mainly in cmath.c. */
#define alloc_c(len)    ((complex *) tmalloc((len) * sizeof (complex)))
#define alloc_d(len)    ((double *) tmalloc((len) * sizeof (double)))
#define FTEcabs(d)  (((d) < 0.0) ? - (d) : (d))
#define cph(c)    (atan2(imagpart(c), (realpart(c))))
#define cmag(c)  (sqrt(imagpart(c) * imagpart(c) + realpart(c) * realpart(c)))
#define radtodeg(c) (cx_degrees ? ((c) / 3.14159265358979323846 * 180) : (c))
#define degtorad(c) (cx_degrees ? ((c) * 3.14159265358979323846 / 180) : (c))
#define rcheck(cond, name)      if (!(cond)) { \
    fprintf(cp_err, "Error: argument out of range for %s\n", name); \
    return (NULL); }

/* Here's a gross one. */
#ifndef HAS_SHORTMACRO

#define cdiv(r1, i1, r2, i2, r3, i3)            \
{                           \
    double r, s;                    \
    if (FTEcabs(r2) > FTEcabs(i2)) {          \
        r = (i2) / (r2);            \
        s = (r2) + r * (i2);            \
        (r3) = ((r1) + r * (i1)) / s;       \
        (i3) = ((i1) - r * (r1)) / s;       \
    } else {                    \
        r = (r2) / (i2);            \
        s = (i2) + r * (r2);            \
        (r3) = (r * (r1) + (i1)) / s;       \
        (i3) = (r * (i1) - (r1)) / s;       \
    }                       \
}

#else

#define cdiv(r1, i1, r2, i2, r3, i3) cx_cdiv(r1, i1, r2, i2, &r3, &i3)
extern void cx_cdiv();

#endif