Add `.bufs`/`.blobs` methods to `IO::Path` / `IO::Handle`

[lizmat]

Just as .lines provides a lazy Seq of lines, I think it would be worthwhile to have a lazy Seq of buf8/blob8 objects of a file. This could be helpful in some workflows where serially decoding a (large) file is the bottleneck. Using .blobs would give the opportunity to only need to decode those parts one is actually interested in.

[Leont]

But how would it decide how big the blobs should be?

[lizmat]

Whatever IO::Handle.READ returns :-)

[Leont]

Whatever IO::Handle.READ returns :-)

Does that use read(2) or fread(3) semantics? I have a memory of it doing the latter, which would be unusable; I may be mistaken.

Basically, does it retry when getting less than $wanted bytes or not. It truly shouldn't.

[lizmat]

nqp::readfh($!PIO,nqp::create(buf8.^pun),$bytes)

I'm not sure about the semantics, but probably with retry. Not sure what the backends provide.

[lizmat]

FWIW, I think an iterator should use READ semantics.

OTOH, a supply based on asyncreadbytes would be the truly lazy approach.

[Leont]

Basically, does it retry when getting less than $wanted bytes or not. It truly shouldn't.

This is another example of such an issue.