// Copyright 2016 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 <stddef.h>

#include <stdint.h>

#include <vector>

#include "archive.h"

struct Buffer {

  const uint8_t *buf;

  size_t len;

};

ssize_t reader_callback(struct archive *a, void *client_data,

                        const void **block) {

  Buffer *buffer = reinterpret_cast<Buffer *>(client_data);

  *block = buffer->buf;

  ssize_t len = buffer->len;

  buffer->len = 0;

  return len;

}

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len) {

  int ret;

  ssize_t r;

  struct archive *a = archive_read_new();

  archive_read_support_filter_all(a);

  archive_read_support_format_all(a);

  Buffer buffer = {buf, len};

  archive_read_open(a, &buffer, NULL, reader_callback, NULL);

  std::vector<uint8_t> data_buffer(getpagesize(), 0);

  struct archive_entry *entry;

  while(1) {

    ret = archive_read_next_header(a, &entry);

    if (ret == ARCHIVE_EOF || ret == ARCHIVE_FATAL)

      break;

    if (ret == ARCHIVE_RETRY)

      continue;

    while ((r = archive_read_data(a, data_buffer.data(),

            data_buffer.size())) > 0)

      ;

    if (r == ARCHIVE_FATAL)

      break;

  }

  archive_read_free(a);

  return 0;

}