46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/**********
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Copyright 1990 Regents of the University of California. All rights reserved.
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Author: 1985 Thomas L. Quarles
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**********/
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/*
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*/
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/* CKTground(ckt,node)
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* specify the node to be the ground node of the given circuit
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*/
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#include "ngspice.h"
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#include "cktdefs.h"
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#include "ifsim.h"
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#include "sperror.h"
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int
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CKTground(void *inCkt, void **node, IFuid name)
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{
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CKTcircuit *ckt = (CKTcircuit *)inCkt;
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if(ckt->CKTnodes) {
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if(ckt->CKTnodes->name) {
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/*already exists - keep old name, but return it */
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if(node)*node = (char *)ckt->CKTnodes;
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return(E_EXISTS);
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}
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ckt->CKTnodes->name = name;
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ckt->CKTnodes->type = SP_VOLTAGE;
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ckt->CKTnodes->number = 0;
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} else {
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ckt->CKTnodes = (CKTnode *)MALLOC(sizeof(CKTnode));
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if(ckt->CKTnodes == NULL) return(E_NOMEM);
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ckt->CKTnodes->name = name;
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ckt->CKTnodes->type = SP_VOLTAGE;
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ckt->CKTnodes->number = 0;
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ckt->CKTnodes->next = (CKTnode *)NULL;
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ckt->CKTlastNode = ckt->CKTnodes;
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}
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if(node)*node = (char *)ckt->CKTnodes;
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return(OK);
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}
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