On Tue, Nov 06, 2007 at 07:49:26AM -0500, Kyle Moffett wrote:
> On Nov 06, 2007, at 07:23:36, Ahmed S. Darwish wrote:
>> On 11/6/07, Adrian Bunk <[email protected]> wrote:
>>> On Tue, Nov 06, 2007 at 01:34:05PM +0200, Ahmed S. Darwish wrote:
>>>> As far as I understand the problem now, isspace() accepts the 0xa0
>>>> character which might collide with some of UTF-8 encoded characters
>>>> cause the high bit is set.
>>
>> I admit I'm not experienced in such encoding stuff, but shouldn't the
>> ASCII and the ASCII-compatible UTF-8 encodings be enough for the labels?
>>
>>> It would not work if someone would e.g. give you UTF-16 encoded strings,
>>> but I don't see this happening in practice.
>>
>> Won't this complicate the code too much ?
>
> Well the VFS (for example) certainly doesn't support any encodings other
> than various extended-ASCII forms (which includes UTF-8). Something like
> UTF-16 has extra null characters in-between every normal character, and as
> such would fail completely if passed to the VFS.
Good point.
> Personally I think that isspace() accepting character 0xA0 is a bug, as
> there are several variants of extended ASCII only one of which has that
> character as a space. Others have it as á (accented A), etc.
But even then Smack would still have a similar problem with isgraph().
> In addition
> the "canonical" internal text format of the kernel is UTF-8 as that
> encoding can represent any character in any other encoding and it is
> backwards-compatible with traditional ASCII.
>
> Cheers,
> Kyle Moffett-
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
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