int

       MongoDB, Inc

       2009-present, MongoDB, Inc.

1.30.4                                            Jun 08, 2025                                 BSON_VSNPRINTF(3)

       Like bson_snprintf() but allows for variadic parameters.

       • str: A location for the resulting string.

       • size: The size of str in bytes.

       • format: A printf style format string.

       • ap: A va_list of parameters for the format.

       The number of bytes written to str excluding the \0 byte.

          int
          bson_vsnprintf (char *str, size_t size, const char *format, va_list ap);