[clang-tools-extra] Add bugprone-undefined-sprintf-overlap (PR #114244)

[Julian Schmidt via cfe-commits]

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@@ -0,0 +1,82 @@
+//===--- UndefinedSprintfOverlapCheck.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 "UndefinedSprintfOverlapCheck.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+#include "clang/Lex/Lexer.h"
+
+using namespace clang::ast_matchers;
+
+namespace clang::tidy::bugprone {
+
+AST_MATCHER_P(IntegerLiteral, hasSameValueAs, std::string, ID) {
+  return Builder->removeBindings(
+      [this, &Node](const ast_matchers::internal::BoundNodesMap &Nodes) {
+        const DynTypedNode &BN = Nodes.getNode(ID);
+        if (const auto *Lit = BN.get<IntegerLiteral>()) {
+          return Lit->getValue() != Node.getValue();
+        }
+        return true;
+      });
+}
+
+UndefinedSprintfOverlapCheck::UndefinedSprintfOverlapCheck(
+    StringRef Name, ClangTidyContext *Context)
+    : ClangTidyCheck(Name, Context),
+      SprintfRegex(Options.get("SprintfFunction", "(::std)?::(sn?printf)")) {}
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5chmidti wrote:

The second pair of parentheses are not needed

https://github.com/llvm/llvm-project/pull/114244