Hugs ffi, sizeOf operator

Mon, 6 Jan 2003 15:42:27 -0500

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I ran into a possible problem while testing some ffi code.
 This is with hugs compiled for cygwin or with the windows (msi)  =
version.
Hugs says: sizeOf x::CDouble is 4,
wheras 'C' says sizeof(double) is 8.

I ~~think~~ I see what the problem is with sizeOf.  I am using the
new hierarchical libs, and it defines sizeOf by hardcoding the sizes =
rather
then asking 'c' like the previous versions did. And sizeOf Double is =
coded
as 4 in libraries\Foreign\Storable.hs
Is there something simple I just don't understand?=20

As a side note, is alignPtr implemented somewhere?

(Alastair, I already sent this to you, but didnt sent to the list.)

Gratefully,=20
  Ron
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<DIV><FONT face=3DArial size=3D2><FONT face=3D"Times New Roman" =
size=3D3>I ran into a=20
possible problem while testing some ffi code.<BR>&nbsp;This is with hugs =

compiled for cygwin or with the windows (msi)&nbsp; version. Hugs =
says:=20
sizeOf x::CDouble is 4, wheras 'C' says sizeof(double) is=20
8. I=20
~~think~~ I see what the problem&nbsp;is with&nbsp;sizeOf.&nbsp; I am =
using=20
the new hierarchical libs, and it defines sizeOf by hardcoding the =
sizes=20
rather then asking 'c' like the previous versions did. And sizeOf =
Double is=20
coded as 4 in =
libraries\Foreign\Storable.hs<FONT=20
face=3DArial size=3D2> Is there something simple I just don't understand?=20
</DIV>
<DIV>&nbsp;</DIV>
<DIV>As a side note, is alignPtr implemented =

somewhere?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>&nbsp;</DIV>
<DIV>(Alastair, I already sent this to you, but didnt sent to the =
list.)</DIV>
<DIV><BR>Gratefully, </DIV>
<DIV>&nbsp; Ron</FONT></DIV></BODY></HTML>

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