| Re: [AD] implementing seek |
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On 2010-04-08, Matthew Leverton <meffer@xxxxxxxxxx> wrote:
>
> Attached is my current favorite proposal:
>
> ALLEGRO_FILE *al_fopen_slice(ALLEGRO_FILE *fh, size_t initial_size,
> bool expandable)
>
> (The third parameter could be a set of flags instead.)
>
> It's meant to allow you to treat a subsection of a random access file
> as a new, self-contained file.
Nice.
The initial_size parameter should be int64_t.
> The file mode (read/write) is inherited from the parent.
>
> If the initialize size is set past the actual size of a read-only
> file, the behavior is undefined.
>
> It does not work with sequential files, but it could if a memory
> buffer were implemented upon detecting (if possible) that random
> access was not allowed.
Or add it as a flag in the third parameter.
Peter