File indexing completed on 2024-05-12 05:40:55

 /*
     SPDX-FileCopyrightText: 2017 Klarälvdalens Datakonsult AB a KDAB Group company info@kdab.com
     SPDX-FileContributor: Sérgio Martins <sergio.martins@kdab.com>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "connect-not-normalized.h"
 #include "ClazyContext.h"
 #include "HierarchyUtils.h"
 #include "NormalizedSignatureUtils.h"
 #include "StringUtils.h"
 
 #include <clang/AST/Decl.h>
 #include <clang/AST/DeclCXX.h>
 #include <clang/AST/Expr.h>
 #include <clang/AST/ExprCXX.h>
 #include <clang/AST/ParentMap.h>
 #include <clang/AST/Stmt.h>
 #include <clang/Basic/LLVM.h>
 #include <llvm/ADT/StringRef.h>
 #include <llvm/Support/Casting.h>
 
 using namespace clang;
 
 ConnectNotNormalized::ConnectNotNormalized(const std::string &name, ClazyContext *context)
     : CheckBase(name, context, Option_CanIgnoreIncludes)
 {
 }
 
 void ConnectNotNormalized::VisitStmt(clang::Stmt *stmt)
 {
     handleQ_ARG(stmt) || handleConnect(dyn_cast<CallExpr>(stmt));
 }
 
 bool ConnectNotNormalized::handleQ_ARG(clang::Stmt *stmt)
 {
     if (auto *casted = dyn_cast<CallExpr>(stmt); casted && casted->getNumArgs() == 2) {
         if (auto *func = casted->getDirectCallee()) {
             const std::string retTypeName = func->getReturnType().getAsString(lo());
             if (retTypeName == "QMetaMethodArgument" || retTypeName == "QMetaMethodReturnArgument") {
                 auto *literal = clazy::getFirstChildOfType2<StringLiteral>(casted->getArg(0));
                 return literal ? checkNormalizedLiteral(literal, casted) : false;
             }
         }
     }
     auto *expr = dyn_cast<CXXConstructExpr>(stmt);
     if (!expr || expr->getNumArgs() != 2) {
         return false;
     }
 
     CXXConstructorDecl *ctor = expr->getConstructor();
     if (!ctor) {
         return false;
     }
 
     auto name = ctor->getNameAsString();
     if (name != "QArgument" && name != "QReturnArgument") {
         return false;
     }
 
     auto *sl = clazy::getFirstChildOfType2<clang::StringLiteral>(expr->getArg(0));
     return sl && checkNormalizedLiteral(sl, expr);
 }
 bool ConnectNotNormalized::checkNormalizedLiteral(clang::StringLiteral *sl, clang::Expr *expr)
 {
     const std::string original = sl->getString().str();
     const std::string normalized = clazy::normalizedType(original.c_str());
 
     if (original == normalized) {
         return false;
     }
 
     emitWarning(expr, "Signature is not normalized. Use " + normalized + " instead of " + original);
     return true;
 }
 
 bool ConnectNotNormalized::handleConnect(CallExpr *callExpr)
 {
     if (!callExpr) {
         return false;
     }
 
     FunctionDecl *func = callExpr->getDirectCallee();
     if (!func || func->getNumParams() != 1 || clazy::name(func) != "qFlagLocation") {
         return false;
     }
 
     {
         // Only warn in connect statements, not disconnect, since there there's no optimization in Qt's side
         auto *parentCallExpr = clazy::getFirstParentOfType<CallExpr>(m_context->parentMap, m_context->parentMap->getParent(callExpr), -1);
         if (!parentCallExpr) {
             return false;
         }
 
         FunctionDecl *parentFunc = parentCallExpr->getDirectCallee();
         if (!parentFunc || clazy::name(parentFunc) != "connect") {
             return false;
         }
     }
 
     Expr *arg1 = callExpr->getArg(0);
     auto *sl = clazy::getFirstChildOfType2<clang::StringLiteral>(arg1);
     if (!sl) {
         return false;
     }
     std::string original = sl->getString().str();
     std::string normalized = clazy::normalizedSignature(original.c_str());
 
     // discard the junk after '\0'
     normalized = std::string(normalized.c_str());
     original = std::string(original.c_str());
 
     if (original == normalized) {
         return false;
     }
 
     // Remove first digit
     normalized.erase(0, 1);
     original.erase(0, 1);
 
     emitWarning(callExpr->getBeginLoc(), "Signature is not normalized. Use " + normalized + " instead of " + original);
     return true;
 }