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/*
* Copyright (c) 2000 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: net_assign.cc,v 1.4 2000/09/10 02:18:16 steve Exp $"
#endif
# include "netlist.h"
/*
* NetAssign
*/
NetAssign_::NetAssign_(const string&n, unsigned w)
: NetNode(n, w), bmux_(0)
{
for (unsigned idx = 0 ; idx < pin_count() ; idx += 1) {
pin(idx).set_dir(Link::OUTPUT);
pin(idx).set_name("P", idx);
}
more = 0;
}
NetAssign_::~NetAssign_()
{
assert( more == 0 );
if (bmux_) delete bmux_;
}
void NetAssign_::set_bmux(NetExpr*r)
{
assert(bmux_ == 0);
bmux_ = r;
}
const NetExpr* NetAssign_::bmux() const
{
return bmux_;
}
unsigned NetAssign_::lwidth() const
{
if (bmux_) return 1;
else return pin_count();
}
NetAssignBase::NetAssignBase(NetAssign_*lv, NetExpr*rv)
: lval_(lv), rval_(rv)
{
}
NetAssignBase::~NetAssignBase()
{
if (rval_) delete rval_;
while (lval_) {
NetAssign_*tmp = lval_;
lval_ = tmp->more;
tmp->more = 0;
delete tmp;
}
}
NetExpr* NetAssignBase::rval()
{
return rval_;
}
const NetExpr* NetAssignBase::rval() const
{
return rval_;
}
void NetAssignBase::set_rval(NetExpr*r)
{
if (rval_) delete rval_;
rval_ = r;
}
NetAssign_* NetAssignBase::l_val(unsigned idx)
{
NetAssign_*cur = lval_;
while (idx > 0) {
if (cur == 0)
return cur;
cur = cur->more;
idx -= 1;
}
assert(idx == 0);
return cur;
}
const NetAssign_* NetAssignBase::l_val(unsigned idx) const
{
const NetAssign_*cur = lval_;
while (idx > 0) {
if (cur == 0)
return cur;
cur = cur->more;
idx -= 1;
}
assert(idx == 0);
return cur;
}
unsigned NetAssignBase::lwidth() const
{
unsigned sum = 0;
for (NetAssign_*cur = lval_ ; cur ; cur = cur->more)
sum += cur->lwidth();
return sum;
}
NetAssign::NetAssign(NetAssign_*lv, NetExpr*rv)
: NetAssignBase(lv, rv)
{
}
NetAssign::~NetAssign()
{
}
NetAssignNB::NetAssignNB(NetAssign_*lv, NetExpr*rv)
: NetAssignBase(lv, rv)
{
}
NetAssignNB::~NetAssignNB()
{
}
/*
* $Log: net_assign.cc,v $
* Revision 1.4 2000/09/10 02:18:16 steve
* elaborate complex l-values
*
* Revision 1.3 2000/09/07 00:06:53 steve
* encapsulate access to the l-value expected width.
*
* Revision 1.2 2000/09/02 23:40:13 steve
* Pull NetAssign_ creation out of constructors.
*
* Revision 1.1 2000/09/02 20:54:20 steve
* Rearrange NetAssign to make NetAssign_ separate.
*
*/
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