bool

       MongoDB, Inc

       2009-present, MongoDB, Inc.

1.30.4                                            Jun 08, 2025                                     BSON_STEAL(3)

       Efficiently transfer the contents of src to dst and destroy src.

       Before  calling this function, src must be initialized and dst must be uninitialized. After this function
       returns successfully, src is destroyed, and dst is initialized and must be freed with bson_destroy().

       For example, if you have a higher-level structure that wraps a bson_t, use bson_steal  to  transfer  BSON
       data into it:

          typedef struct {
             bson_t bson;
          } bson_wrapper_t;

          bson_wrapper_t *
          wrap_bson (bson_t *b)
          {
             bson_wrapper_t *wrapper = bson_malloc (sizeof (bson_wrapper_t));

             if (bson_steal (&wrapper->bson, b)) {
                return wrapper;
             }

             bson_free (wrapper);
             return NULL;
          }

          void
          bson_wrapper_destroy (bson_wrapper_t *wrapper)
          {
             bson_destroy (&wrapper->bson);
             bson_free (wrapper);
          }

          int
          main (int argc, char *argv[])
          {
             bson_t bson = BSON_INITIALIZER;
             bson_wrapper_t *wrapper;

             BSON_APPEND_UTF8 (&bson, "key", "value");

             /* now "bson" is destroyed */
             wrapper = wrap_bson (&bson);

             /* clean up */
             bson_wrapper_destroy (wrapper);
          }

       • dst: An uninitialized bson_t.

       • src: A bson_t.

       Returns  true  if  src  was  successfully  moved  to  dst,  false  if  src  is invalid, or was statically
       initialized, or another error occurred.

       SEEALSO:bson_destroy_with_steal(), a lower-level function that returns the raw contents of a bson_t.

          bool
          bson_steal (bson_t *dst, bson_t *src);