Re: [PATCH v2 0/15] MR3157: include: Introduce wine_dbgstr_h and debugstr_h.

[Bernhard Kölbl]

Bernhard Kölbl (@besentv) commented about include/wine/debug.h:
> return wine_dbgstr_wn( s, -1 );
>  }
>
> +static inline const char *wine_dbgstr_h( struct HSTRING__ *hstr )
> +{
> +    const WCHAR *str;
> +    UINT32 len;
> +    if (hstr && !((ULONG_PTR)hstr >> 16)) return "(invalid)";

Just out of curiosity, could someone explain the workings behind this line? Especially `((ULONG_PTR)hstr >> 16))`is really puzzling for me.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/3157#note_36932