/**********
Copyright 1992 Regents of the University of California.  All rights
reserved.
Author: 1992 Charles Hough
**********/

#include "ngspice/ngspice.h"
#include "ngspice/ifsim.h"
#include "ngspice/inpdefs.h"
#include "ngspice/inpmacs.h"
#include "ngspice/fteext.h"
#include "inpxx.h"

void
INP2Y(
    CKTcircuit *ckt,
    INPtables *tab,
    struct card *current)

{
/* parse a txl card */
/* Yxxxx node1 gnode node2 gnode name */

int mytype; /* the type to determine txl */
int mytype2; /* the type to determine cpl */
int type;   /* the type the model says it is */
char *line; /* the part of the current line left to parse */
char *name; /* the resistor's name */
char *buf; /* temporary buffer for parsing */
char *model;    /* the name of the resistor's model */
char *nname1;   /* the first node's name */
char *nname2;   /* the second node's name */
char *rname1, *rname2, *rname3;
char *cname1, *cname2, *cname3, *cname4;
char *internal1, *internal2;
char *ground1, *ground2;
CKTnode *node1; /* the first node's node pointer */
CKTnode *node2; /* the second node's node pointer */
CKTnode *gnode1, *gnode2, *inode1, *inode2;
int error;      /* error code temporary */
int error1=0;   /* secondary error code temporary */
INPmodel *thismodel;    /* pointer to model structure describing our model */
GENmodel *mdfast;    /* pointer to the actual model */
GENinstance *fast;  /* pointer to the actual instance */
GENmodel *mdfast2, *mdfast3, *mdfast4, *mdfast5, *mdfast6;
GENinstance *fast2, *fast3, *fast4, *fast5, *fast6;
IFuid uid;      /* uid for default model */
GENinstance *txl;
IFvalue ptemp;  /* a value structure to package into */
double lval=0, rval=0, cval=0, lenval=0;
int lenvalgiven = 0;

    mytype = INPtypelook("TransLine");
    mytype2 = INPtypelook("CplLines");

    if(mytype < 0 ) {
        LITERR("Device type TransLine not supported by this binary\n");
        return;
    }
    line = current->line;
    INPgetNetTok(&line,&name,1);
    INPinsert(&name,tab);
    INPgetNetTok(&line,&nname1,1);
    INPtermInsert(ckt,&nname1,tab,&node1);
    INPgetNetTok(&line,&ground1,1);
    INPtermInsert(ckt,&ground1,tab,&gnode1);
    INPgetNetTok(&line,&nname2,1);
    INPtermInsert(ckt,&nname2,tab,&node2);
    INPgetNetTok(&line,&ground2,1);
    INPtermInsert(ckt,&ground2,tab,&gnode2);

    INPgetNetTok(&line, &model, 1);
    if(*model) { /* token isn't null */
            INPinsert(&model,tab);
            current->error = INPgetMod(ckt,model,&thismodel,tab);
            INPgetTok(&line,&model,1);
            if (strcmp(model, "len") == 0) {
               lenval = INPevaluate(&line,&error1,1);
               lenvalgiven = 1;
            }
            if(thismodel != NULL) {
                    if (thismodel->INPmodType == mytype2) {
                            INP2P(ckt,tab,current);
                            return;
                    }
                    else if (mytype != thismodel->INPmodType) {
                            LITERR("incorrect model type");
                            return;
                    }
                    line = thismodel->INPmodLine->line;
                    INPgetTok(&line,&buf,1);  /* throw out .model */
                    INPgetTok(&line,&buf,1);  /* throw out model name */
                    INPgetTok(&line,&buf,1);  /* throw out txl */
                    INPgetTok(&line,&buf,1);
                    while (*line != '\0') {
                            if (*buf == 'R' || *buf == 'r') {
                                    INPgetTok(&line,&buf,1);
                                    rval = INPevaluate(&buf, &error1, 1);
                            }
                            if ((strcmp(buf,"L") == 0)  || (strcmp(buf,"l") == 0)) {
                                    INPgetTok(&line,&buf,1);
                                    lval = INPevaluate(&buf, &error1, 1);
                            }
                            if ((strcmp(buf,"C") == 0)  || (strcmp(buf,"c") == 0)) {
                                    INPgetTok(&line,&buf,1);
                                    cval = INPevaluate(&buf, &error1, 1);
                            }
                            if (lenvalgiven == 0) {
                                    if (strcmp(buf,"length")== 0) {
                                            INPgetTok(&line,&buf,1);
                                            lenval = INPevaluate(&buf, &error1, 1);
                                    }
                            }
                            INPgetTok(&line,&buf,1);
                    }
                    if (lenval && rval && lval && rval/lval > 1.6e10) {
                            /* use 3-pi model for high resistance as fall back */
                            rval = 3.0 / (rval * lenval);
                            cval = cval * lenval / 6.0;

                            type = INPtypelook("Resistor");

                            /* resistor between node1 and internal1 */
                            internal1 = TMALLOC(char, 10 + strlen(name));
                            strcpy(internal1, "txlnd1");
                            strcat(internal1, name);
                            INPtermInsert(ckt, &internal1, tab, &inode1);
                            if(!tab->defRmod) {
                                    /* create default R model */
                                    IFnewUid(ckt, &uid, NULL, "R", UID_MODEL, NULL);
                                    IFC(newModel, (ckt,type,&(tab->defRmod),uid));
                            }
                            mdfast = tab->defRmod;
                            rname1 = TMALLOC(char, 10 + strlen(name));
                            strcpy(rname1, "txlres1");
                            strcat(rname1, name);
                            INPinsert(&rname1, tab);
                            IFC(newInstance,(ckt,mdfast,&fast,rname1));
                            IFC(bindNode,(ckt,fast,1,node1));
                            IFC(bindNode,(ckt,fast,2,inode1));
                            ptemp.rValue = rval;
                            GCA(INPpName,("resistance",&ptemp,ckt,type,fast));

                            /* resistor between internal1 and internal2 */
                            internal2 = TMALLOC(char, 10 + strlen(name));
                            strcpy(internal2, "txlnd2");
                            strcat(internal2, name);
                            INPtermInsert(ckt, &internal2, tab, &inode2);
                            rname2 = TMALLOC(char, 10 + strlen(name));
                            strcpy(rname2, "txlres2");
                            strcat(rname2, name);
                            INPinsert(&rname2, tab);
                            mdfast2 = tab->defRmod;
                            IFC(newInstance,(ckt,mdfast2,&fast2,rname2));
                            IFC(bindNode,(ckt,fast2,1,inode1));
                            IFC(bindNode,(ckt,fast2,2,inode2));
                            ptemp.rValue = rval;
                            GCA(INPpName,("resistance",&ptemp,ckt,type,fast2));

                            /* resistor between internal2 and node2 */
                            rname3 = TMALLOC(char, 10 + strlen(name));
                            strcpy(rname3, "txlres3");
                            strcat(rname3, name);
                            INPinsert(&rname3, tab);
                            mdfast3 = tab->defRmod;
                            IFC(newInstance,(ckt,mdfast3,&fast3,rname3));
                            IFC(bindNode,(ckt,fast3,1,inode2));
                            IFC(bindNode,(ckt,fast3,2,node2));
                            ptemp.rValue = rval;
                            GCA(INPpName,("resistance",&ptemp,ckt,type,fast3));

                            /* capacitor on node1 */
                            type = INPtypelook("Capacitor");
                            if(!tab->defCmod) {
                                    IFnewUid(ckt, &uid, NULL, "C", UID_MODEL, NULL);
                                    IFC(newModel,(ckt,type,&(tab->defCmod),uid));
                            }
                            mdfast4 = tab->defCmod;
                            cname1 = TMALLOC(char, 10 + strlen(name));
                            strcpy(cname1, "txlcap1");
                            strcat(cname1, name);
                            INPinsert(&cname1, tab);
                            IFC(newInstance,(ckt,mdfast4,&fast4,cname1));
                            IFC(bindNode,(ckt,fast4,1,node1));
                            IFC(bindNode,(ckt,fast4,2,gnode1));
                            ptemp.rValue = cval;
                            GCA(INPpName,("capacitance",&ptemp,ckt,type,fast4));

                            /* capacitor on internal1 */
                            cname2 = TMALLOC(char, 10 + strlen(name));
                            strcpy(cname2, "txlcap2");
                            strcat(cname2, name);
                            INPinsert(&cname2, tab);
                            mdfast4 = tab->defCmod;
                            IFC(newInstance,(ckt,mdfast4,&fast4,cname2));
                            IFC(bindNode,(ckt,fast4,1,inode1));
                            IFC(bindNode,(ckt,fast4,2,gnode1));
                            ptemp.rValue = cval * 2;
                            GCA(INPpName,("capacitance",&ptemp,ckt,type,fast4));

                            /* capacitor on internal2 */
                            cname3 = TMALLOC(char, 10 + strlen(name));
                            strcpy(cname3, "txlcap3");
                            strcat(cname3, name);
                            INPinsert(&cname3, tab);
                            mdfast5 = tab->defCmod;
                            IFC(newInstance,(ckt,mdfast5,&fast5,cname3));
                            IFC(bindNode,(ckt,fast5,1,inode2));
                            IFC(bindNode,(ckt,fast5,2,gnode1));
                            ptemp.rValue = cval * 2;
                            GCA(INPpName,("capacitance",&ptemp,ckt,type,fast5));

                            /* capacitor on node2 */
                            cname4 = TMALLOC(char, 10 + strlen(name));
                            strcpy(cname4, "txlcap4");
                            strcat(cname4, name);
                            INPinsert(&cname4, tab);
                            mdfast6 = tab->defCmod;
                            IFC(newInstance,(ckt,mdfast6,&fast6,cname4));
                            IFC(bindNode,(ckt,fast6,1,node2));
                            IFC(bindNode,(ckt,fast6,2,gnode1));
                            ptemp.rValue = cval;
                            GCA(INPpName,("capacitance",&ptemp,ckt,type,fast6));
                            return;

                    }

                    /* use regular txl model */
                    mdfast = thismodel->INPmodfast;
                    type = thismodel->INPmodType;
            } else {
                    type = mytype;
                    if(!tab->defYmod) {
                            /* create default Y model */
                            IFnewUid(ckt, &uid, NULL, "Y", UID_MODEL, NULL);
                            IFC(newModel, (ckt,type,&(tab->defYmod),uid));
                    }
                    mdfast = tab->defYmod;
            }
            IFC(newInstance,(ckt,mdfast,&fast,name));
    } else  {
            LITERR("model name is not found");
            return;
    }

    if (error1 == 0 && lenvalgiven) {
            ptemp.rValue = lenval;
            GCA(INPpName,("length",&ptemp,ckt,type,fast));
    }

    IFC(bindNode,(ckt,fast,1,node1));
    IFC(bindNode,(ckt,fast,2,node2));

    txl = /*fixme*/ fast;

    return;
}