// Copyright 2020 Google LLC

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//      http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#include <string>

#include "re2/re2.h"

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {

  if (size < 3 || size > 64) return 0;

  uint16_t f = (data[0] << 16) + data[1];

  RE2::Options opt;

  opt.set_log_errors(false);

  if (f & 1) opt.set_encoding(RE2::Options::EncodingLatin1);

  opt.set_posix_syntax(f & 2);

  opt.set_longest_match(f & 4);

  opt.set_literal(f & 8);

  opt.set_never_nl(f & 16);

  opt.set_dot_nl(f & 32);

  opt.set_never_capture(f & 64);

  opt.set_case_sensitive(f & 128);

  opt.set_perl_classes(f & 256);

  opt.set_word_boundary(f & 512);

  opt.set_one_line(f & 1024);

  const char *b = reinterpret_cast<const char*>(data) + 2;

  const char *e = reinterpret_cast<const char*>(data) + size;

  std::string s1(b, e);

  RE2 re(s1, opt);

  if (re.ok())

    RE2::FullMatch(s1, re);

  return 0;

}