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