// 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 "yaml.h"

#include "yaml_write_handler.h"

#include <assert.h>

#include <stdbool.h>

#include <stdint.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#ifdef NDEBUG

#undef NDEBUG

#endif

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

  if (size < 2)

    return 0;

  bool done = false;

  bool is_canonical = data[0] & 1;

  bool is_unicode = data[1] & 1;

  data += 2;

  size -= 2;

  yaml_parser_t parser;

  yaml_emitter_t emitter;

  yaml_event_t event;

  /* Initialize the parser and emitter objects. */

  if (!yaml_parser_initialize(&parser))

    return 0;

  if (!yaml_emitter_initialize(&emitter))

    goto cleanup_parser;

  /* Set the parser parameters. */

  yaml_parser_set_input_string(&parser, data, size);

  /* Set the emitter parameters. */

  yaml_output_buffer_t out = {/*buf=*/NULL, /*size=*/0, /*capacity=*/1000};

  yaml_emitter_set_output(&emitter, yaml_write_handler, &out);

  yaml_emitter_set_canonical(&emitter, is_canonical);

  yaml_emitter_set_unicode(&emitter, is_unicode);

  /* The main loop. */

  while (!done) {

    /* Get the next event. */

    if (!yaml_parser_parse(&parser, &event))

      break;

    /* Check if this is the stream end. */

    done = (event.type == YAML_STREAM_END_EVENT);

    /* Emit the event. */

    if (!yaml_emitter_emit(&emitter, &event))

      break;

  }

  free(out.buf);

  yaml_emitter_delete(&emitter);

cleanup_parser:

  yaml_parser_delete(&parser);

  return 0;

}