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/*
* Copyright (C) 2015 Andrei Karas
*
* This file is part of AstDumper.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "analysis/statement.h"
#include "command.h"
#include "logger.h"
#include "analysis/analysis.h"
#include "analysis/walkitem.h"
#include "nodes/expr/eq_expr.h"
#include "nodes/expr/indirect_ref.h"
#include "nodes/expr/modify_expr.h"
#include "nodes/expr/pointerplus_expr.h"
#include "nodes/stmt/if_stmt.h"
#include <set>
#include "localconsts.h"
namespace Analysis
{
WalkItem analyseIfStmt(IfStmtNode *node, WalkItem wi)
{
// need condition node
if (!node->condition || command == FindArgs)
return wi;
if (node->condition->nodeType == EQ_EXPR)
{
EqExprNode *eq = static_cast<EqExprNode*>(node->condition);
// need atleast two operands for EQ_EXPR node
if (eq->args.size() < 2)
return wi;
// PARM_DECL?
Node *node1 = eq->args[0];
// INTEGER_CST?
Node *node2 = eq->args[1];
// if (var == const)
if (node1->nodeType == PARM_DECL &&
node2->nodeType == INTEGER_CST &&
wi.checkNullVars.find(node1->label) != wi.checkNullVars.end() &&
node2->label == "0")
{
// found check for parameter and 0.
// walking to then branch
walkTree(node->thenNode, wi);
// From else branch remove variable what we just found.
wi.checkNullVars.erase(node1->label);
walkTree(node->elseNode, wi);
wi.stopWalking = true;
// need aslo on parent remove variable too
// probably wi should have pointer to parent
return wi;
}
}
return wi;
}
}
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