cdiv.c

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/* eispack/cdiv.f -- translated by f2c (version 20050501).
   You must link the resulting object file with libf2c:
        on Microsoft Windows system, link with libf2c.lib;
        on Linux or Unix systems, link with .../path/to/libf2c.a -lm
        or, if you install libf2c.a in a standard place, with -lf2c -lm
        -- in that order, at the end of the command line, as in
                cc *.o -lf2c -lm
        Source for libf2c is in /netlib/f2c/libf2c.zip, e.g.,

                http://www.netlib.org/f2c/libf2c.zip
*/

#ifdef __cplusplus
extern "C" {
#endif
#include "v3p_netlib.h"

/*<       subroutine cdiv(ar,ai,br,bi,cr,ci) >*/
/* Subroutine */ int cdiv_(doublereal *ar, doublereal *ai, doublereal *br, 
        doublereal *bi, doublereal *cr, doublereal *ci)
{
    /* System generated locals */
    doublereal d__1, d__2;

    /* Local variables */
    doublereal s, ais, bis, ars, brs;

/*<       double precision ar,ai,br,bi,cr,ci >*/

/*     complex division, (cr,ci) = (ar,ai)/(br,bi) */

/*<       double precision s,ars,ais,brs,bis >*/
/*<       s = dabs(br) + dabs(bi) >*/
    s = abs(*br) + abs(*bi);
/*<       ars = ar/s >*/
    ars = *ar / s;
/*<       ais = ai/s >*/
    ais = *ai / s;
/*<       brs = br/s >*/
    brs = *br / s;
/*<       bis = bi/s >*/
    bis = *bi / s;
/*<       s = brs**2 + bis**2 >*/
/* Computing 2nd power */
    d__1 = brs;
/* Computing 2nd power */
    d__2 = bis;
    s = d__1 * d__1 + d__2 * d__2;
/*<       cr = (ars*brs + ais*bis)/s >*/
    *cr = (ars * brs + ais * bis) / s;
/*<       ci = (ais*brs - ars*bis)/s >*/
    *ci = (ais * brs - ars * bis) / s;
/*<       return >*/
    return 0;
/*<       end >*/
} /* cdiv_ */

#ifdef __cplusplus
        }
#endif