On Friday 20 July 2007 10:11, Philipp Klaus Krause wrote:
> Hynek Sladky schrieb:
> > I think it is a bug because:
> >
> > struct {
> > unsigned short CCC:12;
> > unsigned short READ_BL_LEN:4;
> > } CSD;
> > ----> works as expected (2 bytes long)
> >
> > struct {
> > unsigned short READ_BL_LEN:4;
> > unsigned short CCC:12;
> > } CSD;
> > ----> works wrong (3 bytes long)
> >
> > I think that this should work the same way shouldn't it?
>
> AFAIk compilers may align larger struct members to different from
> smaller ones (like aligning ints to 16 bit boundaries, aligning bytes to
> 8 bit boundaries). I suppose it's the sme for bitfields.
I don't know much about sdcc, but what about something like #pragma pack(1) or
__attribute__ ((packed)), shouldn't this force tight packing ?
Alex
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