90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
/*
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* Copyright (c) 2003-2010 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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# include "netlist.h"
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# include "netmisc.h"
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# include <cassert>
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/*
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* Search for the hierarchical name.
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*/
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NetScope*symbol_search(const LineInfo*li, Design*des, NetScope*scope,
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pform_name_t path,
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NetNet*&net,
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const NetExpr*&par,
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NetEvent*&eve,
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const NetExpr*&ex1, const NetExpr*&ex2)
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{
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assert(scope);
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bool hier_path = false;
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/* Get the tail name of the object we are looking for. */
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perm_string key = peek_tail_name(path);
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path.pop_back();
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/* Initialize output argument to cleared. */
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net = 0;
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par = 0;
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eve = 0;
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/* If the path has a scope part, then search for the specified
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scope that we are supposed to search. */
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if (! path.empty()) {
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list<hname_t> path_list = eval_scope_path(des, scope, path);
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assert(path_list.size() <= path.size());
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// If eval_scope_path returns a short list, then some
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// part of the scope was not found. Abort.
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if (path_list.size() < path.size())
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return 0;
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scope = des->find_scope(scope, path_list);
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if (scope && scope->is_auto() && li) {
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cerr << li->get_fileline() << ": error: Hierarchical "
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"reference to automatically allocated item "
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"`" << key << "' in path `" << path << "'" << endl;
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des->errors += 1;
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}
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hier_path = true;
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}
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while (scope) {
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if ( (net = scope->find_signal(key)) )
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return scope;
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if ( (eve = scope->find_event(key)) )
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return scope;
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if ( (par = scope->get_parameter(des, key, ex1, ex2)) )
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return scope;
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/* We can't look up if we are at the enclosing module scope
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* or if a hierarchical path was given. */
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if ((scope->type() == NetScope::MODULE) || hier_path)
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scope = 0;
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else
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scope = scope->parent();
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}
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return 0;
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}
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