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/*
This file is part of the clazy static checker.
Copyright (C) 2015 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com
Author: Sérgio Martins <sergio.martins@kdab.com>
Copyright (C) 2015 Sergio Martins <smartins@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "LoopUtils.h"
#include "clazy_stl.h"
#include <clang/AST/ParentMap.h>
#include <clang/Basic/SourceLocation.h>
#include <clang/Frontend/CompilerInstance.h>
#include <clang/AST/DeclCXX.h>
#include <clang/AST/ExprCXX.h>
using namespace std;
using namespace clang;
Stmt *LoopUtils::bodyFromLoop(Stmt *loop)
{
if (!loop)
return nullptr;
if (auto forstm = dyn_cast<ForStmt>(loop)) {
return forstm->getBody();
}
if (auto rangeLoop = dyn_cast<CXXForRangeStmt>(loop)) {
return rangeLoop->getBody();
}
if (auto whilestm = dyn_cast<WhileStmt>(loop)) {
return whilestm->getBody();
}
if (auto dostm = dyn_cast<DoStmt>(loop)) {
return dostm->getBody();
}
return nullptr;
}
bool LoopUtils::loopCanBeInterrupted(clang::Stmt *stmt, const clang::SourceManager &sm,
clang::SourceLocation onlyBeforeThisLoc)
{
if (!stmt)
return false;
if (isa<ReturnStmt>(stmt) || isa<BreakStmt>(stmt) || isa<ContinueStmt>(stmt)) {
if (onlyBeforeThisLoc.isValid()) {
FullSourceLoc sourceLoc(stmt->getLocStart(), sm);
FullSourceLoc otherSourceLoc(onlyBeforeThisLoc, sm);
if (sourceLoc.isBeforeInTranslationUnitThan(otherSourceLoc))
return true;
} else {
return true;
}
}
return clazy_std::any_of(stmt->children(), [&sm, onlyBeforeThisLoc](Stmt *s) {
return LoopUtils::loopCanBeInterrupted(s, sm, onlyBeforeThisLoc);
});
}
clang::Expr *LoopUtils::containerExprForLoop(Stmt *loop)
{
if (!loop)
return nullptr;
if (auto rangeLoop = dyn_cast<CXXForRangeStmt>(loop)) {
return rangeLoop->getRangeInit();
}
if (auto constructExpr = dyn_cast<CXXConstructExpr>(loop)) {
if (constructExpr->getNumArgs() < 1)
return nullptr;
CXXConstructorDecl *constructorDecl = constructExpr->getConstructor();
if (!constructorDecl || constructorDecl->getNameAsString() != "QForeachContainer")
return nullptr;
return constructExpr;
}
return nullptr;
}
VarDecl* LoopUtils::containerDeclForLoop(clang::Stmt *loop)
{
Expr *expr = containerExprForLoop(loop);
if (!expr)
return nullptr;
auto declRef = dyn_cast<DeclRefExpr>(expr);
if (!declRef)
return nullptr;
ValueDecl *valueDecl = declRef->getDecl();
return valueDecl ? dyn_cast<VarDecl>(valueDecl) : nullptr;
}
Stmt* LoopUtils::isInLoop(clang::ParentMap *pmap, clang::Stmt *stmt)
{
if (!stmt)
return nullptr;
Stmt *p = pmap->getParent(stmt);
while (p) {
if (LoopUtils::isLoop(p))
return p;
p = pmap->getParent(p);
}
return nullptr;
}
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