[Numpy-discussion] Solaris Sparc build broken
Charles R Harris
charlesr.harris at gmail.com
Fri Nov 6 10:05:39 EST 2009
On Fri, Nov 6, 2009 at 12:10 AM, David Cournapeau <
david at ar.media.kyoto-u.ac.jp> wrote:
> Charles R Harris wrote:
> >
> >
> > On Thu, Nov 5, 2009 at 10:35 PM, David Cournapeau
> > <david at ar.media.kyoto-u.ac.jp <mailto:david at ar.media.kyoto-u.ac.jp>>
> > wrote:
> >
> > Charles R Harris wrote:
> > > So you are going to leave us all hanging here in curiosity? What is
> > > your solution?
> >
> > I had to sleep :)
> >
> > The solution is based on parsing the generated binary code -
> > that's how
> > MPFR is doing it, so it has been tested in the wild. The code to
> > compile
> > is something like:
> >
> > /* "before" is 16 bytes to ensure there's no padding between it
> > and "x".
> > * We're not expecting any "long double" bigger than 16 bytes
> > or with
> > * alignment requirements stricter than 16 bytes. */
> > typedef long double test_type;
> >
> > struct {
> > char before[16];
> > test_type x;
> > char after[8];
> > } foo = {
> > { '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
> > '\001', '\043', '\105', '\147', '\211', '\253', '\315',
> > '\357' },
> > -123456789.0,
> > { '\376', '\334', '\272', '\230', '\166', '\124', '\062',
> > '\020' }
> > };
> >
> > They compile it, parse with awk from the dump od -f.
> >
> >
> > So the before/after bits are tags that mark the beginning/end of the
> > type for the parse? Any particular reason not to use a string?
> As for why not using my name, I am not that megalomaniac, at least not
> yet :)
>
> od prints a dump in octal form, so a string is not much more readable. I
> am not sure why they use od instead of another dump format - but there
> is value if keeping the same format as them for testing, all other
> things being equal.
>
>
Is od available on all platforms? Couldn't you just read the file using
Python?
Chuck
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