// © 2019 and later: Unicode, Inc. and others.

// License & terms of use: http://www.unicode.org/copyright.html

// Fuzzer for ICU Locales.

#include <algorithm>

#include <cstddef>

#include <cstdint>

#include <cstdlib>

#include <string>

#include <vector>

#include "unicode/locid.h"

namespace {

void ConsumeNBytes(const uint8_t** data, size_t* size, size_t N) {

  *data += N;

  *size -= N;

}

uint8_t ConsumeUint8(const uint8_t** data, size_t* size) {

  uint8_t tmp = 0;

  if (*size >= 1) {

    tmp = (*data)[0];

    ConsumeNBytes(data, size, 1);

  }

  return tmp;

}

std::string ConsumeSubstring(const uint8_t** data, size_t* size) {

  const size_t request_size = ConsumeUint8(data, size);

  const char* substring_start = reinterpret_cast<const char*>(*data);

  const size_t substring_size = std::min(*size, request_size);

  ConsumeNBytes(data, size, substring_size);

  return std::string(substring_start, substring_size);

}

}  // namespace

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

  const std::string language = ConsumeSubstring(&data, &size);

  const std::string country = ConsumeSubstring(&data, &size);

  const std::string variant = ConsumeSubstring(&data, &size);

  const std::string kv_pairs = ConsumeSubstring(&data, &size);

  icu::Locale locale(language.c_str(), country.c_str(), variant.c_str(),

                     kv_pairs.c_str());

  return EXIT_SUCCESS;

}