Re: Notes on diffcore API

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Hi,

On Tue, 27 Jun 2006, Junio C Hamano wrote:

> "Alex Riesen" <raa.lkml@xxxxxxxxx> writes:
> 
> > On 6/27/06, Junio C Hamano <junkio@xxxxxxx> wrote:
> >> -- >8 --
> >> Notes on diffcore API
> >> =====================
> >
> > Thanks!
> >
> >> Diffcore Transformation
> >> -----------------------
> >>
> >> The input file pairs recorded in the previous phase are
> >> collected in diff_queued_diff (a global variable -- which means
> >> that you cannot have two diffs running in parallel with the
> >> current setup).  This is an expandable array of pointers to
> >> `struct diff_filepair` structure.
> >>
> >
> > merge-recursive shouldn't have any problems with that, as the
> > renames are just read in the current implementation.
> > Still, it is somehow uncomfortable to see the amount of APIs
> > with the above restriction. Never know when it'll bite.
> 
> I think it is simply the matter of moving diff_queued_diff a
> field in diff_optionss structure and adding an extra parameter
> to point at the current diff_options to handful functions if we
> ever need to support it.  I haven't bothered doing that because
> we haven't had the need to run more than one diff at once.

And we shouldn't bother until we need it. It has a small performance 
impact, and the code gets more ugly.

Ciao,
Dscho

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