Re: [AD] implementing seek

[Thomas Fjellstrom <tfjellstrom@xxxxxxxxxx>]

On April 7, 2010, Peter Wang wrote:
> On 2010-04-07, Thomas Fjellstrom <tfjellstrom@xxxxxxxxxx> wrote:
> > On April 7, 2010, Peter Wang wrote:
> > > On 2010-04-07, Matthew Leverton <meffer@xxxxxxxxxx> wrote:
> > > > My proposal is that some form of this is added to the core I/O
> > > > routines (not an addon). And subsequently, anybody who wants to
> > > > treat a sub part of a file as a single entity to a loader / saver
> > > > function must explicitly set up a splice.
> > > 
> > > Yes.  I'm not sure how a splice will work for saving though.
> > 
> > Probably like any handle would, except it gets EOF when/after it
> > reaches the end of the slice. so its impossible to overwrite past the
> > end.
> 
> I was wondering how the user would know how big to make the slice,
> ahead of time.
> 
> Ok, if the al_fopen_slice 'length' parameter is a _maximum_ length,
> then you can pass INT_MAX or some other big number.  When the slice is
> closed we set the file position to initial_slice_pos + max_slice_length,
> or the end of the file, which comes first.

Makes sense.

> Peter
> 
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-- 
Thomas Fjellstrom
tfjellstrom@xxxxxxxxxx