1 //===-- ClangFormatFuzzer.cpp - Fuzz the Clang format tool ----------------===//
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 /// \file
11 /// This file implements a function that runs Clang format on a single
12 ///  input. This function is then linked into the Fuzzer library.
13 ///
14 //===----------------------------------------------------------------------===//
15 
16 #include "clang/Format/Format.h"
17 
18 extern "C" int LLVMFuzzerTestOneInput(uint8_t *data, size_t size) {
19   // FIXME: fuzz more things: different styles, different style features.
20   std::string s((const char *)data, size);
21   auto Style = getGoogleStyle(clang::format::FormatStyle::LK_Cpp);
22   Style.ColumnLimit = 60;
23   auto Replaces = reformat(Style, s, clang::tooling::Range(0, s.size()));
24   auto Result = applyAllReplacements(s, Replaces);
25 
26   // Output must be checked, as otherwise we crash.
27   if (!Result) {}
28   return 0;
29 }
30