icu4c/source/test/fuzzer/converter_fuzzer.cc

// © 2019 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html

#include <stddef.h>
#include <stdint.h>

#include <algorithm>
#include <array>
#include <memory>
#include <vector>

#include "fuzzer_utils.h"
#include "unicode/unistr.h"
#include "unicode/ucnv.h"

IcuEnvironment* env = new IcuEnvironment();

template <typename T>
using deleted_unique_ptr = std::unique_ptr<T, std::function<void(T*)>>;

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
  UErrorCode status = U_ZERO_ERROR;
  auto rng = CreateRng(data, size);
  icu::UnicodeString str(UnicodeStringFromUtf8(data, size));

  const char* converter_name =
      ucnv_getAvailableName(rng() % ucnv_countAvailable());

  deleted_unique_ptr<UConverter> converter(ucnv_open(converter_name, &status),
                                           &ucnv_close);

  if (U_FAILURE(status))
    return 0;

  static const size_t dest_buffer_size = 1024 * 1204;
  static const std::unique_ptr<char[]> dest_buffer(new char[dest_buffer_size]);

  str.extract(dest_buffer.get(), dest_buffer_size, converter.get(), status);

  if (U_FAILURE(status))
    return 0;

  return 0;
}