#include <bson/bson.h>
typedef struct _bson_reader_t bson_reader_t;
bson_reader_t *
bson_reader_new_from_handle (void *handle,


                             bson_reader_read_func_t rf,


                             bson_reader_destroy_func_t df);
bson_reader_t *
bson_reader_new_from_fd (int fd, bool close_on_destroy);
bson_reader_t *
bson_reader_new_from_file (const char *path, bson_error_t *error);
bson_reader_t *
bson_reader_new_from_data (const uint8_t *data, size_t length);
void
bson_reader_destroy (bson_reader_t *reader);

/*


 * Copyright 2009-present MongoDB, 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.


 */
/*


 * This program will print each BSON document contained in the provided files


 * as a JSON string to STDOUT.


 */
#include <bson/bson.h>
#include <stdio.h>
int
main (int argc, char *argv[])
{


   bson_reader_t *reader;


   const bson_t *b;


   bson_error_t error;


   const char *filename;


   char *str;


   int i;


   /*


    * Print program usage if no arguments are provided.


    */


   if (argc == 1) {


      fprintf (stderr, "usage: %s [FILE | -]...\nUse - for STDIN.\n", argv[0]);


      return 1;


   }


   /*


    * Process command line arguments expecting each to be a filename.


    */


   for (i = 1; i < argc; i++) {


      filename = argv[i];


      if (strcmp (filename, "-") == 0) {


         reader = bson_reader_new_from_fd (STDIN_FILENO, false);


      } else {


         if (!(reader = bson_reader_new_from_file (filename, &error))) {


            fprintf (


               stderr, "Failed to open \"%s\": %s\n", filename, error.message);


            continue;


         }


      }


      /*


       * Convert each incoming document to JSON and print to stdout.


       */


      while ((b = bson_reader_read (reader, NULL))) {


         str = bson_as_canonical_extended_json (b, NULL);


         fprintf (stdout, "%s\n", str);


         bson_free (str);


      }


      /*


       * Cleanup after our reader, which closes the file descriptor.


       */


      bson_reader_destroy (reader);


   }


   return 0;
}