Function stream_delete_and_insert_vaformat 

pub unsafe extern "C" fn stream_delete_and_insert_vaformat(
    stream: *mut Stream,
    delete_size: usize,
    format: *const c_char,
    args: va_list,
) -> bool

Delete N chars from the stream and insert formatted string to the stream, va_list version

Arguments

• stream - Stream instance
• delete_size - size of data to be deleted
• format -
• args -

Returns

true if the operation was successful false on error