[Haskell-cafe] UTF-8 in Haskell.

Antoine Latter aslatter at gmail.com
Mon Dec 27 03:32:10 CET 2010


What would you be using the CString for? A CString is really a lot
less useful than a ByteString for almost all purposes. If I allready
had a ByteString, the only reason I would want to convert it to a
CString is to call a C function.

Take care,

On Sun, Dec 26, 2010 at 7:40 PM, Magicloud Magiclouds
<magicloud.magiclouds at gmail.com> wrote:
> Thanks for the ideas.
> In this case, ssh, it is a transfer layer protocol, which means it
> does not convert anything. For example the server was using ascii, and
> the client was using ascii, then good. If the client was using UTF-8
> instead, then he might get a broken display, ssh itself would not
> care.
> My idea for CString is because in C, this is easy, "I" do not pay
> attention to which encode the given string is using.
> But I am not sure how CString works. If it just convert things into
> ASCII, then it is bad.
> On Thu, Dec 23, 2010 at 7:18 PM, Max Bolingbroke
> <batterseapower at hotmail.com> wrote:
>> On 23 December 2010 05:29, Magicloud Magiclouds
>> <magicloud.magiclouds at gmail.com> wrote:
>>>  If so, OK, then I think I could make a packInt which turns an Int
>>> into 4 Word8 first. Thus under all situation (ascii, UTF-8, or even
>>> UTF-32), my program always send 4 bytes through the network. Is that
>>> OK?
>> I think you are describing the UTF-32 encoding (under the assumption
>> that fromEnum on Char returns the Unicode code point of that
>> character, which I think is true). UTF-32 is capable of describing
>> every Unicode code point so this is indeed non-lossy. UTF-32 is a
>> reasonable wire transfer format (if a bit inefficient!).
>> Don't roll your own encoding logic though, System.IO provides a
>> TextEncoding for UTF-32 you can use to do the job more reliably.
>> Cheers,
>> Max
> --
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