Re: Wide-string Functions: Double Casting

[David Laight]

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