Re: [PATCH] Add --show-size to git log to print message size

["Marco Costalba" <mcostalba@gmail.com>]

On 7/14/07, Junio C Hamano <gitster@pobox.com> wrote:
> "Marco Costalba" <mcostalba@gmail.com> writes:
>
>
> "size" is a bit vague here.  What if we later want to extend
> things so that you can ask for the entire log entry size
> including the patch output part (I am not saying that would be
> an easy change --- I am more worried about the stability of the
> external interface).  So is --show-"size".  "message-size" would
> have been a bit easier to swallow, but I sense the problem runs
> deeper.
>

I'm rewriting the patch + documentation cleaned up and with a
different option name (--show-log).

Currently the patch just include the log message because the diff
content (-p option) is not buffered but is written with a combination
of printf, puts, fputs, fwrite and putchar directly to stdout.

My question is, there is a way to get the quantity of bytes written to
stdout before they are printed? I'm not an expert of C stdio library,
so perhaps this is nonsense, but I was thinking of reading the size of
stout buffer before to fflush() (I don't know if it is possible).

If it is not possible I have to give up in extending the scope of this
'show me the size' patch to diff content and I will stick to the
proper name --show-log.

Thanks
Marco