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/*
* Copyright (c) 2002-2010 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 "config.h"
# include "util.h"
# include "PExpr.h"
# include "netlist.h"
# include <iostream>
# include <cassert>

/*
* The evaluate_attributes function evaluates the attribute
* expressions from the map, and returns a table in a form suitable
* for passing to netlist devices.
*/

attrib_list_t* evaluate_attributes(const map<perm_string,PExpr*>&att,
unsigned&natt,
Design*des, NetScope*scope)
{
      natt = att.size();
      if (natt == 0)
return 0;

      attrib_list_t*table = new attrib_list_t [natt];

      unsigned idx = 0;

      typedef map<perm_string,PExpr*>::const_iterator iter_t;
      for (iter_t cur = att.begin() ; cur != att.end() ; ++ cur , idx += 1) {
table[idx].key = (*cur).first;
PExpr*exp = (*cur).second;

/* If the attribute value is given in the source, then
evaluate it as a constant. If the value is not
given, then assume the value is 1. */
verinum*tmp = 0;
if (exp) {
tmp = exp->eval_const(des, scope);
                  if (tmp == 0) {
cerr << exp->get_fileline() << ": error: ``"
<< *exp << "'' is not a constant expression."
<< endl;
des->errors += 1;
                  }
            }
if (tmp == 0)
tmp = new verinum(1);

assert(tmp);

table[idx].val = *tmp;
delete tmp;
      }

      assert(idx == natt);
      return table;
}
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