FW: FW: unicode character on Different Unix platforms ....

From: Hemant Ramnani (hemant@pspl.co.in)
Date: Tue Nov 02 1999 - 22:52:28 EST

        Can you please tell me on which platforms is wchar_t 1 byte..
Let me know this as soon as possible, as I might go on the wrong track then.

Thank you.

Hemant. Ramnani
Member of Techincal Staff,
Persistent Systems Private Limited.
Email : hemant@pspl.co.in <mailto:hemant@pspl.co.in>
Tele.  : 5676700 ( Ext. 467 )
       :  653109 ( R )

-----Original Message-----
From: Valeriy E. Ushakov [mailto:uwe@ptc.spbu.ru]
Sent: Wednesday, November 03, 1999 12:36 AM
To: Unicode List
Subject: Re: FW: unicode character on Different Unix platforms ....

On Tue, Nov 02, 1999 at 10:10:34AM -0800, schererm@us.ibm.com wrote:

> ANSI C defines wchar_t as an abstract type for "wide" characters but does
> not specify a concrete type nor a character set for it. On some platforms,
> it is Unicode, on others, it is a scalar form of the platform default
> Relying on wchar_t to be anything fixed across platforms will not work.

Moreover, implementations with 1 byte wchar_t are perfectly conformant,
so using wchar_t for Unicode is *definitely* a bad idea.

>From ISO C9X draft: Sizes of integer types <limits.h>

       [#1] The values given below shall be replaced by constant
       expressions suitable for use in #if preprocessing
       directives. ................................................
       ........... Their implementation-defined values shall be
       equal or greater in magnitude (absolute value) to those
       shown, with the same sign.


          - maximum number of bytes in a multibyte character, for
            any supported locale
            MB_LEN_MAX 1

SY, Uwe

uwe@ptc.spbu.ru                         |       Zu Grunde kommen
http://www.ptc.spbu.ru/~uwe/            |       Ist zu Grunde gehen

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