On Fri, Aug 28, 2009 at 11:40 AM, Randi Botse<nightdecoder@xxxxxxxxx> wrote: > Ben, after assign all bitfield struct member, how to pack them to be a > 32bit integer value? > > DEC BIN > 43 101011 -> foo.a (6 bit) > 11 1011 -> foo.b (4 bit) > 120 01111000 -> foo.c (8 bit) > 30 11110 -> foo.d (5 bit) > 418 110100010 -> foo.e (9 bit) > > the bit pattern is : 10101110110111100011110110100010 or 2933800354 in > decimal, is this possible? > > while with masking and shift i can pack them with: > ((foo.a & 0x3f) << 26) | ((foo.b & 0xf) << 22) | ((foo,c & 0xff) << > 14) | ((foo.d & 0x1f) << 9) | (foo.e & 0x1ff) > > The bitfield struct is already packed, you don't need to do anything else. Just assign values to the different parts. Ben -- To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
