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/*
* Copyright (c) 2002-2021 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 "netmisc.h"
# include <iostream>
# include <cassert>
using namespace std;
/*
* 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. */
if (exp) {
NetExpr *tmp = elab_and_eval(des, scope, exp, -1, true);
if (!tmp)
continue;
if (NetEConst *ce = dynamic_cast<NetEConst*>(tmp)) {
table[idx].val = ce->value();
} else if (NetECReal *cer = dynamic_cast<NetECReal*>(tmp)) {
table[idx].val = verinum(cer->value().as_long());
} else {
cerr << exp->get_fileline() << ": error: ``"
<< *exp << "'' is not a constant expression."
<< endl;
des->errors += 1;
}
delete tmp;
} else {
table[idx].val = verinum(1);
}
}
assert(idx == natt);
return table;
}
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