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/*
* Copyright (c) 2002-2004 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
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: eval_attrib.cc,v 1.9 2007/06/04 19:14:06 steve Exp $"
#endif

# include "config.h"
# include "util.h"
# include "PExpr.h"
# include "netlist.h"
# include <iostream>
# include <assert.h>

/*
* 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++) {
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;
if (exp)
tmp = exp->eval_const(des, scope);
else
tmp = new verinum(1);

if (tmp == 0)
cerr << "internal error: no result for " << *exp << endl;
assert(tmp);

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

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

/*
* $Log: eval_attrib.cc,v $
* Revision 1.9 2007/06/04 19:14:06 steve
* Build errors in picky GCC compilers.
*
* Revision 1.8 2005/11/27 17:01:57 steve
* Fix for stubborn compiler.
*
* Revision 1.7 2004/02/20 18:53:35 steve
* Addtrbute keys are perm_strings.
*
* Revision 1.6 2003/01/27 05:09:17 steve
* Spelling fixes.
*
* Revision 1.5 2002/08/12 01:34:59 steve
* conditional ident string using autoconfig.
*
* Revision 1.4 2002/08/10 21:59:39 steve
* The default attribute value is 1.
*
* Revision 1.3 2002/06/06 18:57:18 steve
* Use standard name for iostream.
*
* Revision 1.2 2002/06/03 03:55:14 steve
* compile warnings.
*
* Revision 1.1 2002/05/23 03:08:51 steve
* Add language support for Verilog-2001 attribute
* syntax. Hook this support into existing $attribute
* handling, and add number and void value types.
*
* Add to the ivl_target API new functions for access
* of complex attributes attached to gates.
*
*/
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