Function switch_log_vprintf

pub unsafe extern "C" fn switch_log_vprintf(
    channel: switch_text_channel_t,
    file: *const c_char,
    func: *const c_char,
    line: c_int,
    userdata: *const c_char,
    level: switch_log_level_t,
    fmt: *const c_char,
    ap: *mut __va_list_tag,
)

\brief Write log data to the logging engine \param channel the log channel to write to \param file the current file \param func the current function \param line the current line \param userdata ununsed \param level the current log level \param fmt desired format \param ap variable args \note there are channel macros to supply the first 4 parameters (SWITCH_CHANNEL_LOG, SWITCH_CHANNEL_LOG_CLEAN, …) \see switch_types.h