/**********
Copyright 1990 Regents of the University of California.  All rights reserved.
Author: 1987 Thomas L. Quarles
**********/
/*
 */

/*
 * This routine gives access to the internal device parameters
 * of voltage controlled SWitch
 */

#include "ngspice/ngspice.h"
#include "ngspice/cktdefs.h"
#include "ngspice/devdefs.h"
#include "ngspice/ifsim.h"
#include "swdefs.h"
#include "ngspice/sperror.h"
#include "ngspice/suffix.h"


/* ARGSUSED */
int
SWask(CKTcircuit *ckt, GENinstance *inst, int which, IFvalue *value, IFvalue *select)
{
    SWinstance *here = (SWinstance *)inst;
    static char *msg = "Current and power not available in ac analysis";

    NG_IGNORE(select);

    switch(which) {
        case SW_POS_NODE:
            value->iValue = here->SWposNode;
            return (OK);
        case SW_NEG_NODE:
            value->iValue = here->SWnegNode;
            return (OK);
        case SW_POS_CONT_NODE:
            value->iValue = here->SWposCntrlNode;
            return (OK);
        case SW_NEG_CONT_NODE:
            value->iValue = here->SWnegCntrlNode;
            return (OK);
        case SW_CURRENT:
            if (ckt->CKTcurrentAnalysis & DOING_AC) {
                errMsg = TMALLOC(char, strlen(msg) + 1);
                errRtn = "SWask";
                strcpy(errMsg,msg);
                return(E_ASKCURRENT);
            } else {
                value->rValue = (*(ckt->CKTrhsOld + here->SWposNode)
                        - *(ckt->CKTrhsOld + here->SWnegNode)) *
                        here->SWcond;
            }
            return(OK);
        case SW_POWER:
            if (ckt->CKTcurrentAnalysis & DOING_AC) {
                errMsg = TMALLOC(char, strlen(msg) + 1);
                errRtn = "SWask";
                strcpy(errMsg,msg);
                return(E_ASKPOWER);
            } else {
                value->rValue = (*(ckt->CKTrhsOld + here->SWposNode)
                        - *(ckt->CKTrhsOld + here->SWnegNode)) *
                        (*(ckt->CKTrhsOld + here->SWposNode)
                        - *(ckt->CKTrhsOld + here->SWnegNode)) *
                        here->SWcond;
            }
            return(OK);
        default:
            return (E_BADPARM);
    }
    /* NOTREACHED */
}
