clang-tools 6.0.0

LimitedRandomnessCheck.cpp
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1 //===--- LimitedRandomnessCheck.cpp - clang-tidy---------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "LimitedRandomnessCheck.h"
11 #include "clang/AST/ASTContext.h"
12 #include "clang/ASTMatchers/ASTMatchFinder.h"
13
14 using namespace clang::ast_matchers;
15
16 namespace clang {
17 namespace tidy {
18 namespace cert {
19
20 void LimitedRandomnessCheck::registerMatchers(MatchFinder *Finder) {
21 Finder->addMatcher(callExpr(callee(functionDecl(namedDecl(hasName("::rand")),
22 parameterCountIs(0))))
23 .bind("randomGenerator"),
24 this);
25 }
26
27 void LimitedRandomnessCheck::check(const MatchFinder::MatchResult &Result) {
28 std::string msg = "";
29 if (getLangOpts().CPlusPlus)
30 msg = "; use C++11 random library instead";
31
32 const auto *MatchedDecl = Result.Nodes.getNodeAs<CallExpr>("randomGenerator");
33 diag(MatchedDecl->getLocStart(), "rand() has limited randomness" + msg);
34 }
35
36 } // namespace cert
37 } // namespace tidy
38 } // namespace clang
clang::ast_matchers
Definition: ClangTidyDiagnosticConsumer.h:27
LimitedRandomnessCheck.h
clang
Definition: AndroidTidyModule.cpp:28