// Copyright 2022 Google Inc.

//

// 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 <cstddef>

#include <cstdint>

#include <cstring>

#include <string>

extern "C" {

#include "libjsonnet.h"

}

char* ImportCallback(void* ctx, const char* base, const char* rel,

                     char** found_here, int* success) {

  // Don't load file and mark it as failure.

  *success = 0;

  char* res = jsonnet_realloc(static_cast<struct JsonnetVm*>(ctx), nullptr, 1);

  res[0] = 0;

  return res;

}

std::string ConvertJsonnetToJson(const std::string& jsonnet) {

  JsonnetVm* jvm = jsonnet_make();

  jsonnet_import_callback(jvm, ImportCallback, jvm);

  int error = 0;

  char* res =

      jsonnet_evaluate_snippet(jvm, /*filename=*/"", jsonnet.c_str(), &error);

  std::string json;

  if (error == 0 && res != nullptr) {

    json = res;

  }

  if (res) {

    jsonnet_realloc(jvm, res, 0);

  }

  jsonnet_destroy(jvm);

  return json;

}

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

  std::string fuzz_jsonnet(reinterpret_cast<const char*>(data), size);

  ConvertJsonnetToJson(fuzz_jsonnet);

  return 0;

}