[erlang-questions] binary typed schema-less protocol
Tue Jul 30 00:24:06 CEST 2013
On 29 jul 2013, at 23:52, Richard A. O'Keefe <ok@REDACTED> wrote:
> On 29/07/2013, at 11:55 PM, Tony Rogvall wrote:
>> I am also pretty pleased with cson :-)
>> Looks very nice.
>> A small question.
>> How are strings encoded?
>> a) <utf8-octet-string-length>"<utf8-chars>
>> b) <number-of-unicode-chars>"<integers>*
>> c) <number-of-unicode-chars>"<utf8-char>*
>> d) Other?
> Well, I was doing this in my Smalltalk system, where Strings
> are mutable arrays of Unicode, and where byte streams support
> a #nextUtf8 method. So having read a <number of unicode
> chars> and noticed the " the next step is
> str := String new: n.
> 1 to: n do: [:i | str at: i put: stream nextUtf8].
> So it's (c).
Thanks. That was what I was afraid of.
Luckily I remembered that there is now support for utf8 in Erlangs binary syntax:
decode_string(0, Cs, Acc) ->
decode_string(I, <<Char/utf8,Cs/binary>>, Acc) ->
So all is well.
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