Function av_strlcatf

pub unsafe extern "C" fn av_strlcatf(
    dst: *mut i8,
    size: usize,
    fmt: *const i8,
    ...
) -> usize

Append output to a string, according to a format. Never write out of the destination buffer, and always put a terminating 0 within the buffer. @param dst destination buffer (string to which the output is appended) @param size total size of the destination buffer @param fmt printf-compatible format string, specifying how the following parameters are used @return the length of the string that would have been generated if enough space had been available