Write bits in file

[castironpi]

On May 20, 10:30 am, Nick Craig-Wood <n... at craig-wood.com> wrote:
> Monica Leko <monica.l... at gmail.com> wrote:
> >  On May 18, 2:20?pm, Ken Starks <stra... at lampsacos.demon.co.uk> wrote:
> > > You want your file considered as a sequence of bits rather
> > > than a sequence of 8-bit bytes, do you?
>
> >  Yes.
>
> > > is the 10-bit bit-pattern to be stored at an arbitrary
> > > bit-position in the file
>
> >  Yes.  I need arbitrary, 8bits, than 10 bits for something else, than
> >  sequence of bytes, than 10 bits again, etc.
>
> You could try
>
>  http://construct.wikispaces.com/
>
> which could well do exactly what you want.
>
> --
> Nick Craig-Wood <n... at craig-wood.com> --http://www.craig-wood.com/nick

Do you have space to waste?  If so, how much?  Worst case, you could
be looking at a factor of 32 or higher, if each bit took an entire
system word.