swsetup.c

来自「支持数字元件仿真的SPICE插件」· C语言 代码 · 共 69 行

/*
 * Copyright (c) 1985 Gordon Jacobs
 */

#include "prefix.h"
#include <stdio.h>
#include "SMPdefs.h"
#include "CKTdefs.h"
#include "SWdefs.h"
#include "SPerror.h"
#include "suffix.h"

RCSID("SWsetup.c $Revision: 1.1 $ on $Date: 90/10/11 12:46:26 $")

int
SWsetup(matrix,inModel,ckt,states)
    register SMPmatrix *matrix;
    GENmodel *inModel;
    CKTcircuit *ckt;
    int *states;
        /* load the switch conductance with those pointers needed later 
         * for fast matrix loading 
         */
{
    register SWmodel *model = (SWmodel *)inModel;
    register SWinstance *here;

    /*  loop through all the current source models */
    for( ; model != NULL; model = model->SWnextModel ) {
        /* Default Value Processing for Switch Model */
        if (!model->SWthreshGiven) {
            model->SWvThreshold = 0;
        } 
        if (!model->SWhystGiven) {
            model->SWvHysteresis = 0;
        } 
        if (!model->SWonGiven)  {
            model->SWonConduct = SW_ON_CONDUCTANCE;
            model->SWonResistance = 1.0/model->SWonConduct;
        } 
        if (!model->SWoffGiven)  {
            model->SWoffConduct = SW_OFF_CONDUCTANCE;
            model->SWoffResistance = 1.0/model->SWoffConduct;
        }

        /* loop through all the instances of the model */
        for (here = model->SWinstances; here != NULL ;
                here=here->SWnextInstance) {

            /* Default Value Processing for Switch Instance */
                    /* none */

/* macro to make elements with built in test for out of memory */
#define TSTALLOC(ptr,first,second) \
if((here->ptr = SMPmakeElt(matrix,here->first,here->second))==(double *)NULL){\
    return(E_NOMEM);\
}

            TSTALLOC(SWposPosptr, SWposNode, SWposNode)
            TSTALLOC(SWposNegptr, SWposNode, SWnegNode)
            TSTALLOC(SWnegPosptr, SWnegNode, SWposNode)
            TSTALLOC(SWnegNegptr, SWnegNode, SWnegNode)
            here->SWstate = *states;
            *states += SW_NUM_STATES;
        }
    }
    return(OK);
}