Is it planned to add this support? I roughly imagine, how to make bit fields inside int , but C standard allows bit fields to be, for example, 35 bit total.
Вторник, 11 июня 2013, 6:03 -07:00 от Matthew Flatt <[email protected]>: >At Sun, 09 Jun 2013 21:42:47 +0400, Клочков Роман wrote: >> How to make in Racket FFI struct with bit fields >> For example, such struct >> >> struct box_props >> { >> unsigned int opaque : 1; >> unsigned int fill_color : 3; >> unsigned int : 4; // fill to 8 bits >> unsigned int show_border : 1; >> unsigned int border_color : 3; >> unsigned int border_style : 2; >> unsigned int : 2; // fill to 16 bits >> }; >> >> ? > >The `ffi/unsafe' library currently doesn't include support for >bitfields. I think you have to declare a structure with an integer and >use operations like `arithmetic-shift' and `bitwise-and' to manipulate >bits in the integer. > -- Роман Клочков ____________________ Racket Users list: http://lists.racket-lang.org/users
