Re: glyphless

[Jason Rumney <jasonr@gnu.org>]

Eli Zaretskii <eliz@gnu.org> writes:

>     /* Sub-stretch for type == GLYPHLESS_GLYPH.  */
>     struct
>     {
>       /* Value is an enum of the type glyphless_display_method.  */
>       unsigned method : 2;
>       /* 1 iff this glyph is for a character of no font. */
>       unsigned for_no_font : 1;
>       /* Length of acronym or hexadecimal code string (at most 8).  */
>       unsigned len : 4;
>       /* Character to display.  Actually we need only 22 bits.  */
>       unsigned ch : 22; <<<<<<<<<<<<<<<<<<<<<<<<<<<<<
>     } glyphless;
>
> I though Andreas said that using 25 here, so that the entire member
> fits in 32 bits, would be better (performance-wise, I presume)?

Probably better is to define an extra member "padding" or "spare", to
make it clear that the ch portion is only 22 bits.