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Postings from April 2007
Glenn Linderman skribis 2007-04-01 16:34 (-0700):
> Aha! OK, this is a way that unpack could successfully operate on a
> multi-bytes buffer. But I think it is also equivalent to downgrading it
> (with a warning for values > 255) and then processing it as bytes.
Not if you also have the "U" in the template somewhere, in addition to
other letters. (Bad idea anyway!)
> I think that pack-U should be defined to produce "encoded bytes"
It doesn't do that, though. It produces encodingless characters, not
bytes. However, you inspired me to come up with the following:
$byte_string = pack "a*[UTF-8]", $text_string
$text_string = unpack "a*[UTF-8]", $byte_string
Likewise for "A" and "Z", and for arbitrary encodings. This would just
call Encode::encode (for pack) or Encode::decode (for unpack)
transparently, before doing the actual packing or unpacking.
The quantifier is a number of bytes, not characters. This means that it
can be in the middle of a multibyte encoding for a character. When that
happens, tough luck. We can't help that. (In other words: this really
only makes a lot of sense for multibyte packing if the quantifier is *)
--
korajn salutojn,
juerd waalboer: perl hacker <juerd@juerd.nl> <http://juerd.nl/sig>
convolution: ict solutions and consultancy <sales@convolution.nl>
Ik vertrouw stemcomputers niet.
Zie <http://www.wijvertrouwenstemcomputersniet.nl/>.
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