92 lines
2.5 KiB
C++
92 lines
2.5 KiB
C++
/*
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* Copyright (c) 2000 Stephen Williams (steve@.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#if !defined(WINNT) && !defined(macintosh)
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#ident "$Id: nexus_from_link.cc,v 1.1 2000/03/16 19:03:03 steve Exp $"
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#endif
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# include "netmisc.h"
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# include <strstream>
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# include <string>
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# include <typeinfo>
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string nexus_from_link(const NetObj::Link*lnk)
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{
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const NetNet*sig = dynamic_cast<const NetNet*>(lnk->get_obj());
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unsigned pin = lnk->get_pin();
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for (const NetObj::Link*cur = lnk->next_link()
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; cur != lnk ; cur = cur->next_link()) {
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const NetNet*cursig = dynamic_cast<const NetNet*>(cur->get_obj());
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if (cursig == 0)
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continue;
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if (sig == 0) {
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sig = cursig;
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pin = cur->get_pin();
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continue;
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}
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if ((cursig->pin_count() == 1) && (sig->pin_count() > 1))
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continue;
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if ((cursig->pin_count() > 1) && (sig->pin_count() == 1)) {
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sig = cursig;
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pin = cur->get_pin();
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continue;
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}
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if (cursig->local_flag() && !sig->local_flag())
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continue;
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if (cursig->name() < sig->name())
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continue;
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sig = cursig;
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pin = cur->get_pin();
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}
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if (sig == 0) {
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const NetObj*obj = lnk->get_obj();
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pin = lnk->get_pin();
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cerr << "internal error: No signal for nexus of " <<
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obj->name() << " pin " << pin << " (type=" <<
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typeid(*obj).name() << ")?" << endl;
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}
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assert(sig);
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ostrstream tmp;
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tmp << sig->name();
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if (sig->pin_count() > 1)
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tmp << "<" << pin << ">";
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tmp << ends;
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return tmp.str();
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}
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/*
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* $Log: nexus_from_link.cc,v $
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* Revision 1.1 2000/03/16 19:03:03 steve
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* Revise the VVM backend to use nexus objects so that
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* drivers and resolution functions can be used, and
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* the t-vvm module doesn't need to write a zillion
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* output functions.
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*
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*/
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