#6391: libGAP! -- create a Cython library interface to gap
---------------------------+------------------------------------------------
Reporter: was | Owner: was
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-4.7
Component: interfaces | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
---------------------------+------------------------------------------------
Old description:
> There's libSingular, there's libPari, and next we need to create libGAP.
>
> Older spkg:
>
> http://sage.math.washington.edu/home/wstein/patches/gap/gap-4.4.10.p17.spkg
>
> Rebased, for Sage 4.6.1 and GAP 4.4.12:
>
> http://sage.math.washington.edu/home/dima/packages/gap-4.4.12.p5.spkg
>
> Current snapshot, handles errors (such as zero division) better, for Sage
> 4.6.1 and GAP 4.4.12:
>
> http://sage.math.washington.edu/home/dima/packages/gap-4.4.12.p6.spkg
New description:
There's libSingular, there's libPari, and next we need to create libGAP.
Most current spkg for Sage-4.7.alpha1:
http://www.stp.dias.ie/~vbraun/Sage/spkg/gap-4.4.12.p7.spkg
Older versions:
http://sage.math.washington.edu/home/wstein/patches/gap/gap-4.4.10.p17.spkg
http://sage.math.washington.edu/home/dima/packages/gap-4.4.12.p5.spkg
http://sage.math.washington.edu/home/dima/packages/gap-4.4.12.p6.spkg
--
Comment(by vbraun):
Changes to the newest spkg:
* removed dist directory
* removed unsetting CC/CXX since "sage -sh" sets these to sane values
* converted all copied files from patches/ into patches
* using libtool to build libGAP
* Code cleanups
Basic functionality now works including trapping errors:
{{{
sage: import sage.libs.gap.gap as g
sage: g.libgap('1/0')
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (1312, 0))
---------------------------------------------------------------------------
ValueError Traceback (most recent call
last)
/home/vbraun/opt/sage-4.7.alpha1/devel/sage-main/sage/libs/gap/<ipython
console> in <module>()
/home/vbraun/Sage/sage/local/lib/python2.6/site-
packages/sage/structure/parent.so in sage.structure.parent.Parent.__call__
(sage/structure/parent.c:6816)()
/home/vbraun/Sage/sage/local/lib/python2.6/site-
packages/sage/structure/coerce_maps.so in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(sage/structure/coerce_maps.c:3254)()
/home/vbraun/Sage/sage/local/lib/python2.6/site-
packages/sage/structure/coerce_maps.so in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(sage/structure/coerce_maps.c:3157)()
/home/vbraun/Sage/sage/local/lib/python2.6/site-
packages/sage/libs/gap/gap.so in
sage.libs.gap.gap.Gap._element_constructor_ (sage/libs/gap/gap.c:4963)()
684 """
685 initialize_libgap()
--> 686 return self.element_class(self, x)
687
688
/home/vbraun/Sage/sage/local/lib/python2.6/site-
packages/sage/libs/gap/gap.so in sage.libs.gap.gap.GapElement.__init__
(sage/libs/gap/gap.c:3047)()
366 except RuntimeError, msg:
367 ClearError()
--> 368 raise ValueError, 'Gap: '+str(msg)
369
370 assert Symbol == S_SEMICOLON, 'Did not end with
semicolon?'
ValueError: Gap: Rational operations: <divisor> must not be zero
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6391#comment:33>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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