From: Clark Cox (clarkcox3@mac.com)
Date: Wed Mar 03 2004 - 13:28:53 EST
From the C standard:
__STDC_ISO_10646_ _An integer constant of the formyyyymmL(for example,
199712L), intended to indicate that values of type wchar_t are the
coded representations of the characters defined by ISO/IEC10646, along
with all amendments and technical corrigenda as of the specified year
and month.
This, to me suggests that wchar_t would indeed be a 32-bit type (well,
at least a 20-bit type) when this macro is defined. However, to be
sure, I'd suggest posting to news:comp.std.c
On Mar 03, 2004, at 12:38, Frank Yung-Fong Tang wrote:
> oh. This is the first time I hear about this. Thanks about your
> information. Does it also mean wchar_t is 4 bytes if __STDC_ISO_10646__
> is defined? or does it only mean wchar_t hold the character in
> ISO_10646
> (which mean it could be 2 bytes, 4 bytes or more than that?)
>
> Noah Levitt wrote on 3/2/2004, 1:33 PM:
>
>> As specified in C99 (and maybe earlier), if the macro
>> __STDC_ISO_10646__ is defined, then wchar_t values are ucs4.
>> Otherwise, wchar_t is an opaque type and you can't be sure
>> what it is.
>>
>> Noah
-- Clark S. Cox III clarkcox3@mac.com http://homepage.mac.com/clarkcox3/ http://homepage.mac.com/clarkcox3/blog/B1196589870/index.html
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