Subj : Re: spidermonkey: byte arrays - again
To   : netscape.public.mozilla.jseng
From : Jens Thiele
Date : Mon Sep 20 2004 11:37 am

Shanti Rao wrote:
> Jens,
> 
> What are you using it for? Arbitrary indexing and manipulation, or
> sequential scanning of text?
> 

I contacted Sajid Raza (the poster in the thread I mentioned) by private
mail and he has written a ByteArray class which closely meets my
requirements / what I would have written. I now am awaiting his reply if
he wants to release this under some open source lincense so I could post
a link.

My thoughts about what a ByteArray should have:

Native operations needed:
(all operations must be safe - range checked,
additional operations could also be added in Javascript itself)

get size
set size/resize (fill new bytes with zero or optionally given value)
get byte
set byte

move bytes within byte array (like memmove)
copy bytes from other byte array (like memcpy)

ByteArray <-> js string:
  convert to / interpret as iso-8859-1 string (as 8-bit subset of ucs-2)
  convert to / interpret as js string (ucs-2) - odd number of bytes?
  set from ucs-2 js string
  set from ucs-2 js string (interpreted as 8-bit iso-8859-1 string)

ByteArray <-> js array?

toSource()?

Jens

.