in reply to [Way OT] C: Arrays of bitfields? (Updated:Please ignore!)

Hi BrowserUk,

I think you cannot do that in C. But you can use macro to hide the messy expression: 

#define getsextet(UV, I) (( (UV) & ( 0x7f << (6*(I)) ) >> 6*(I))

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and the appropriate 'set' and 'clr': 
#define clrsextet(UV, I) ( (UV) & ~( 0x7f << (6*(I)) )
#define setsextet(UV, I, S) ( (UV) | ( ((S) & 0x7f) << (6*(I)) )

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The sextet have to be cleared before set. I haven't had time to test these macros, please use them carefully.

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Re^2: [Way OT] C: Arrays of bitfields?
by BrowserUk (Patriarch) on Jan 18, 2015 at 09:39 UTC
    But you can ... hide the messy expression:

    Indeed. Though I'll probably opt for inlined functions.

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