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net_scope.cc
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net_scope.cc
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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_scope.cc,v 1.4 2000/04/18 04:50:20 steve Exp $"
#endif
# include "netlist.h"
# include <strstream>
/*
* The NetScope class keeps a scope tree organized. Each node of the
* scope tree points to its parent, its right sibling and its leftmost
* child. The root node has no parent or siblings. The node stores the
* name of the scope. The complete hierarchical name of the scope is
* formed by appending the path of scopes from the root to the scope
* in question.
*/
NetScope::NetScope(const string&n)
: type_(NetScope::MODULE), name_(n), up_(0), sib_(0), sub_(0)
{
events_ = 0;
lcounter_ = 0;
}
NetScope::NetScope(NetScope*up, const string&n, NetScope::TYPE t)
: type_(t), name_(n), up_(up), sib_(0), sub_(0)
{
events_ = 0;
sib_ = up_->sub_;
up_->sub_ = this;
}
NetScope::~NetScope()
{
assert(sib_ == 0);
assert(sub_ == 0);
lcounter_ = 0;
}
NetExpr* NetScope::set_parameter(const string&key, NetExpr*expr)
{
NetExpr*&ref = parameters_[key];
NetExpr* res = ref;
ref = expr;
return res;
}
NetExpr* NetScope::set_localparam(const string&key, NetExpr*expr)
{
NetExpr*&ref = localparams_[key];
NetExpr* res = ref;
ref = expr;
return res;
}
const NetExpr* NetScope::get_parameter(const string&key) const
{
map<string,NetExpr*>::const_iterator idx;
idx = parameters_.find(key);
if (idx != parameters_.end())
return (*idx).second;
idx = localparams_.find(key);
if (idx != localparams_.end())
return (*idx).second;
return 0;
}
NetScope::TYPE NetScope::type() const
{
return type_;
}
string NetScope::name() const
{
if (up_)
return up_->name() + "." + name_;
else
return name_;
}
void NetScope::add_event(NetEvent*ev)
{
assert(ev->scope_ == 0);
ev->scope_ = this;
ev->snext_ = events_;
events_ = ev;
}
void NetScope::rem_event(NetEvent*ev)
{
assert(ev->scope_ == this);
ev->scope_ = 0;
if (events_ == ev) {
events_ = ev->snext_;
} else {
NetEvent*cur = events_;
while (cur->snext_ != ev) {
assert(cur->snext_);
cur = cur->snext_;
}
cur->snext_ = ev->snext_;
}
ev->snext_ = 0;
}
NetEvent* NetScope::find_event(const string&name)
{
for (NetEvent*cur = events_; cur ; cur = cur->snext_)
if (cur->name() == name)
return cur;
return 0;
}
/*
* This method locates a child scope by name. The name is the simple
* name of the child, no heirarchy is searched.
*/
NetScope* NetScope::child(const string&name)
{
if (sub_ == 0) return 0;
NetScope*cur = sub_;
while (cur->name_ != name) {
if (cur->sib_ == 0) return 0;
cur = cur->sib_;
}
return cur;
}
const NetScope* NetScope::child(const string&name) const
{
if (sub_ == 0) return 0;
NetScope*cur = sub_;
while (cur->name_ != name) {
if (cur->sib_ == 0) return 0;
cur = cur->sib_;
}
return cur;
}
NetScope* NetScope::parent()
{
return up_;
}
const NetScope* NetScope::parent() const
{
return up_;
}
string NetScope::local_symbol()
{
strstream res;
res << "_l" << (lcounter_++) << ends;
return res.str();
}
/*
* $Log: net_scope.cc,v $
* Revision 1.4 2000/04/18 04:50:20 steve
* Clean up unneeded NetEvent objects.
*
* Revision 1.3 2000/04/10 05:26:06 steve
* All events now use the NetEvent class.
*
* Revision 1.2 2000/04/09 17:04:56 steve
* uninitialized event_ list.
*
* Revision 1.1 2000/04/04 03:20:15 steve
* Simulate named event trigger and waits.
*
*/