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/*
* Copyright (c) 2000-2002 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
*/

# include "config.h"

# include "netlist.h"
# include <assert.h>

NetBlock::NetBlock(Type t, NetScope*ss)
: type_(t), subscope_(ss), last_(0)
{
}

NetBlock::~NetBlock()
{
      while (last_ != 0) {
if (last_->next_ == last_) {
delete last_;
last_ = 0;
} else {
NetProc*cur = last_->next_;
last_->next_ = cur->next_;
cur->next_ = cur;
delete cur;
}
      }
}

void NetBlock::append(NetProc*cur)
{
      if (last_ == 0) {
last_ = cur;
cur->next_ = cur;
      } else {
cur->next_ = last_->next_;
last_->next_ = cur;
last_ = cur;
      }
}

const NetProc* NetBlock::proc_first() const
{
      if (last_ == 0)
return 0;

      return last_->next_;
}

const NetProc* NetBlock::proc_next(const NetProc*cur) const
{
      if (cur == last_)
return 0;

      return cur->next_;
}

NetCase::NetCase(NetCase::TYPE c, NetExpr*ex, unsigned cnt)
: type_(c), expr_(ex), nitems_(cnt)
{
      assert(expr_);
      items_ = new Item[nitems_];
      for (unsigned idx = 0 ; idx < nitems_ ; idx += 1) {
items_[idx].statement = 0;
      }
}

NetCase::~NetCase()
{
      delete expr_;
      for (unsigned idx = 0 ; idx < nitems_ ; idx += 1) {
delete items_[idx].guard;
if (items_[idx].statement) delete items_[idx].statement;
      }
      delete[]items_;
}

NetCase::TYPE NetCase::type() const
{
      return type_;
}

void NetCase::set_case(unsigned idx, NetExpr*e, NetProc*p)
{
      assert(idx < nitems_);
      items_[idx].guard = e;
      items_[idx].statement = p;
      if (items_[idx].guard)
items_[idx].guard->set_width(expr_->expr_width());
}

NetDisable::NetDisable(NetScope*tgt)
: target_(tgt)
{
}

NetDisable::~NetDisable()
{
}

const NetScope* NetDisable::target() const
{
      return target_;
}

NetForever::NetForever(NetProc*p)
: statement_(p)
{
}

NetForever::~NetForever()
{
      delete statement_;
}

NetPDelay::NetPDelay(uint64_t d, NetProc*st)
: delay_(d), expr_(0), statement_(st)
{
}

NetPDelay::NetPDelay(NetExpr*d, NetProc*st)
: delay_(0), expr_(d), statement_(st)
{
}

NetPDelay::~NetPDelay()
{
      if (expr_) delete expr_;
}

uint64_t NetPDelay::delay() const
{
      assert(expr_ == 0);
      return delay_;
}

const NetExpr* NetPDelay::expr() const
{
      return expr_;
}

NetRepeat::NetRepeat(NetExpr*e, NetProc*p)
: expr_(e), statement_(p)
{
}

NetRepeat::~NetRepeat()
{
      delete expr_;
      delete statement_;
}

const NetExpr* NetRepeat::expr() const
{
      return expr_;
}

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