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BSON_WRITER_T(3) libbson BSON_WRITER_T(3)

Bulk BSON serialization Abstraction

SYNOPSIS

#include <bson/bson.h>
typedef struct _bson_writer_t bson_writer_t;
bson_writer_t *
bson_writer_new (uint8_t **buf,


                 size_t *buflen,


                 size_t offset,


                 bson_realloc_func realloc_func,


                 void *realloc_func_ctx);
void
bson_writer_destroy (bson_writer_t *writer);


DESCRIPTION

The bson_writer_t API provides an abstraction for serializing many BSON documents to a single memory region. The memory region may be dynamically allocated and re-allocated as more memory is demanded. This can be useful when building network packets from a high-level language. For example, you can serialize a Python Dictionary directly to a single buffer destined for a TCP packet.

EXAMPLE

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


   bson_writer_t *writer;


   uint8_t *buf = NULL;


   size_t buflen = 0;


   bson_t *doc;


   writer = bson_writer_new (&buf, &buflen, 0, bson_realloc_ctx, NULL);


   for (i = 0; i < 1000; i++) {


      bson_writer_begin (writer, &doc);


      BSON_APPEND_INT32 (&doc, "i", i);


      bson_writer_end (writer);


   }


   bson_writer_destroy (writer);


   bson_free (buf);


   return 0;
}


AUTHOR

MongoDB, Inc

COPYRIGHT

2017-present, MongoDB, Inc

February 25, 2024 1.26.0