| //===--- LimitedRandomnessCheck.cpp - clang-tidy---------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "LimitedRandomnessCheck.h" |
| #include "clang/AST/ASTContext.h" |
| #include "clang/ASTMatchers/ASTMatchFinder.h" |
| |
| using namespace clang::ast_matchers; |
| |
| namespace clang { |
| namespace tidy { |
| namespace cert { |
| |
| void LimitedRandomnessCheck::registerMatchers(MatchFinder *Finder) { |
| Finder->addMatcher(callExpr(callee(functionDecl(namedDecl(hasName("::rand")), |
| parameterCountIs(0)))) |
| .bind("randomGenerator"), |
| this); |
| } |
| |
| void LimitedRandomnessCheck::check(const MatchFinder::MatchResult &Result) { |
| std::string Msg = ""; |
| if (getLangOpts().CPlusPlus) |
| Msg = "; use C++11 random library instead"; |
| |
| const auto *MatchedDecl = Result.Nodes.getNodeAs<CallExpr>("randomGenerator"); |
| diag(MatchedDecl->getBeginLoc(), "rand() has limited randomness" + Msg); |
| } |
| |
| } // namespace cert |
| } // namespace tidy |
| } // namespace clang |