/**
 * bson_append_code_with_scope_and_length:
 * @bson: A bson_t.
 * @key: The key for the document.
 * @javascript: JavaScript code to be executed.
 * @scope: A bson_t containing the scope for @javascript.
 *
 * Appends a field of type BSON_TYPE_CODE to the BSON document
 * if @scope is NULL. Appends BSON_TYPE_CODEWSCOPE if @scope
 * is not NULL (even if it is an empty document). Unlike 
 * bson_append_code_with_scope, this function makes it possible
 * to embed literal NULL bytes in the Javascript text.
 *
 * Returns: true if successful; false if append would overflow max size.
 */
BSON_API
bool
bson_append_code_with_scope_and_length (bson_t       *bson,
                                        const char   *key,
                                        int           key_length,
                                        const char   *javascript,
                                        int           js_length,
                                        const bson_t *scope);