iverilog/netenum.cc

/*
 * Copyright (c) 2010-2024 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

# include  "netenum.h"
# include  "compiler.h"
# include  <cassert>

using namespace std;

netenum_t::netenum_t(ivl_type_t btype, size_t name_count, bool integer_flag)
: base_type_(btype), integer_flag_(integer_flag), names_(name_count),
  bits_(name_count)
{
}

netenum_t::~netenum_t()
{
}

bool netenum_t::get_signed() const
{
      return base_type_->get_signed();
}

bool netenum_t::get_isint() const
{
      return integer_flag_;
}

/*
 * Enumerations are by definition always packed.
 */
bool netenum_t::packed() const
{
      return true;
}

long netenum_t::packed_width() const
{
	return base_type_->packed_width();
}

netranges_t netenum_t::slice_dimensions() const
{
      return base_type_->slice_dimensions();
}

bool netenum_t::insert_name(size_t name_idx, perm_string name, const verinum&val)
{
      std::pair<std::map<perm_string,verinum>::iterator, bool> res;

      assert(val.has_len() && packed_width() >= 0 &&
                              val.len() == (unsigned long)packed_width());

	// Insert a map of the name to the value. This also gets a
	// flag that returns true if the  name is unique, or false
	// otherwise.
      res = names_map_.insert( make_pair(name,val) );

      assert(name_idx < names_.size() && names_[name_idx] == 0);
      names_[name_idx] = name;

      return res.second;
}

void netenum_t::insert_name_close(void)
{
      for (size_t idx = 0 ; idx < names_.size() ; idx += 1) {
	      // If we failed to elaborate the name then skip this step.
	    if (names_[idx].nil()) continue;

	    netenum_t::iterator cur = names_map_.find(names_[idx]);

	    vector<char>str (cur->second.len() + 1);
	    for (unsigned bit = 0 ; bit < cur->second.len() ; bit += 1) {
		  switch (cur->second.get(bit)) {
		      case verinum::V0:
			str[bit] = '0';
			break;
		      case verinum::V1:
			str[bit] = '1';
			break;
		      case verinum::Vx:
			str[bit] = 'x';
			break;
		      case verinum::Vz:
			str[bit] = 'z';
			break;
		  }
	    }
	    bits_[idx] = bits_strings.make(&str[0]);
      }
}

netenum_t::iterator netenum_t::find_name(perm_string name) const
{
      return names_map_.find(name);
}

/*
 * Check to see if the given value is already in the enumeration mapping.
 */
perm_string netenum_t::find_value(const verinum&val) const
{
      perm_string res;
      for(netenum_t::iterator cur = names_map_.begin();
          cur != names_map_.end(); ++ cur) {
	    if (cur->second == val) {
		  res = cur->first;
		  break;
	    }
      }
      return res;
}

netenum_t::iterator netenum_t::end_name() const
{
      return names_map_.end();
}

netenum_t::iterator netenum_t::first_name() const
{
      return names_map_.find(names_.front());
}

netenum_t::iterator netenum_t::last_name() const
{
      return names_map_.find(names_.back());
}

perm_string netenum_t::name_at(size_t idx) const
{
      assert(idx < names_.size());
      return names_[idx];
}

perm_string netenum_t::bits_at(size_t idx) const
{
      return bits_[idx];
}

bool netenum_t::matches(const netenum_t*other) const
{
      return this == other;
}