NAME¶

READING FROM A BSON STREAM¶

READER.C¶

#include <stdio.h>
#include <bson.h>
int main (int argc, char *argv[])
{
   bson_reader_t *reader;
   const bson_t *doc;
   bson_error_t error;
   bool eof;
   reader = bson_reader_new_from_file ("mycollection.bson", &error);
   if (!reader) {
      fprintf (stderr, "Failed to open file.\n");
      return 1;
   }
   while ((doc = bson_reader_read (reader, &eof))) {
      char *str = bson_as_json (doc, NULL);
      printf ("%s\n", str);
      bson_free (str);
   }
   if (!eof) {
      fprintf (stderr, "corrupted bson document found at %u\n",
               (unsigned)bson_reader_tell (reader));
   }
   bson_reader_destroy (reader);
   return 0;
}

See bson_reader_new_from_fd(3) , bson_reader_new_from_file(3) , and bson_reader_new_from_data(3) for more information.

WRITING A SEQUENCE OF BSON DOCUMENTS¶

This could also be useful if you want to write to a network packet while serializing the documents from a higher level language, (but do so just after the packets header).

WRITER.C¶

#include <stdio.h>
#include <bson.h>
#include <assert.h>
int main (int argc, char *argv[])
{
   bson_writer_t *writer;
   bson_t *doc;
   uint8_t *buf = NULL;
   size_t buflen = 0;
   bool r;
   int i;
   writer = bson_writer_new (&buf, &buflen, 0, bson_realloc_ctx, NULL);
   for (i = 0; i < 10000; i++) {
      r = bson_writer_begin (writer, &doc);
      assert (r);
      r = BSON_APPEND_INT32 (doc, "i", i);
      assert (r);
      bson_writer_end (writer);
   }
   bson_free (buf);
   return 0;
}

See bson_writer_new(3) for more information.

COLOPHON¶