Wide-string Functions: Double Casting

[Andrew Talbot]

David Laight wrote:

> On Mon, Aug 07, 2006 at 09:54:20PM +0100, Andrew Talbot wrote:
>> would like to submit a patch that, for example, changes strchrW() to:
>> 
>> extern inline WCHAR *strrchrW( const WCHAR *str, WCHAR ch )
>> {
>>     WCHAR *ret = NULL;
>>     do { if (*str == ch) ret = (WCHAR *)(size_t)str; } while (*str++);
>>     return ret;
>> }
> 
> why not just have:
> 
> extern inline void *__deconst(const void *v)
> {
> return (char *)0 + ((const char *)v - (const char *)0));
> }
> 
> Then the code above could be:
> extern inline WCHAR *strrchrW( const WCHAR *str, WCHAR ch )
> {
> do { if (*str == ch) return __deconst(str); } while (*str++);
> return 0;
> }
> 
> David
> 

That's interesting. IMHO, it's a bit more complex and obscure, but seems to
ensure portability. I shall be interested to know what others think.

Thanks,

-- Andy.