75 lines
2.2 KiB
C++
75 lines
2.2 KiB
C++
/*
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* Copyright (c) 2002-2010 Stephen Williams (steve@icarus.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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# include "config.h"
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# include "util.h"
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# include "PExpr.h"
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# include "netlist.h"
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# include <iostream>
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# include <cassert>
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/*
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* The evaluate_attributes function evaluates the attribute
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* expressions from the map, and returns a table in a form suitable
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* for passing to netlist devices.
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*/
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attrib_list_t* evaluate_attributes(const map<perm_string,PExpr*>&att,
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unsigned&natt,
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Design*des, NetScope*scope)
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{
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natt = att.size();
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if (natt == 0)
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return 0;
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attrib_list_t*table = new attrib_list_t [natt];
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unsigned idx = 0;
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typedef map<perm_string,PExpr*>::const_iterator iter_t;
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for (iter_t cur = att.begin() ; cur != att.end() ; ++ cur , idx += 1) {
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table[idx].key = (*cur).first;
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PExpr*exp = (*cur).second;
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/* If the attribute value is given in the source, then
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evaluate it as a constant. If the value is not
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given, then assume the value is 1. */
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verinum*tmp = 0;
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if (exp) {
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tmp = exp->eval_const(des, scope);
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if (tmp == 0) {
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cerr << exp->get_fileline() << ": error: ``"
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<< *exp << "'' is not a constant expression."
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<< endl;
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des->errors += 1;
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}
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}
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if (tmp == 0)
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tmp = new verinum(1);
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assert(tmp);
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table[idx].val = *tmp;
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delete tmp;
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}
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assert(idx == natt);
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return table;
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}
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