Re: Updating an old C program which uses parilib

["Karim Belabas" <Karim.Belabas@math.u-bordeaux1.fr>]

* Bill Allombert [2009-05-05 17:30]:
> On Tue, May 05, 2009 at 10:58:16AM -0400, Jack Fearnley wrote:
> > I am trying to run a program I wrote and ran successfully some years  
> > back.  It computes Dirichlet twists of elliptic L-functions.  The  
> > program uses  lisGEN which seems no longer to exist.  The usage is
> > ee = smallinitell(lisGEN(stdin));
> > where stdin contains [0,1,0,4,4] for example.
> >
> > There seems to be no exact replacement for this function so I am using  
> > scanf to read the five coefficients as longs and then using mkvecn to  
> > package the coefficients into a vector.
> > scanf("%ld %ld %ld %ld %ld",&c1,&c2,&c3,&c4,&c5);
> >        printf("%ld %ld %ld %ld %ld \n",c1,c2,c3,c4,c5);
> >    eee=mkvecn(5,(GEN)c1,(GEN)c2,(GEN)c3,(GEN)c4,(GEN)c5);
> >    ee = smallinitell(eee);
> >
> > Where ee and eee are defined as GEN.
> >
> > The printed result is
> >
> >
> > 0 1 0 4 4
> >
> >  ***   segmentation fault: bug in PARI or calling program.
> >  ***   Error in the PARI system. End of program.
> >
> > 1) Is there an exact replacement for lisGEN?
> 
> yes, gp_read_stream. thought it seems we forgot to add it to the COMPAT
> file.
[...]

> > 3) Where did gzero go?
> 
> It has been renamed to gen_0, see the COMPAT file.

There is something fishy in Jack's setup: for backward compatibility
both gzero and lisGEN are aliased to the correct names (given above) in
the file pariold.h.

That file should have been installed in /usr/local/include/pari/.

Are your header files up to date ? (and properly included, they may be
overridden by another older install)

What exact version of PARI are you trying to run ?

Cheers,

    K.B.

P.S:  There has been a massive cleanup in libpari names:

- lisGEN has been obsoleted about four years age, and
successively renamed readexpr(), then freadexpr(), before the new name
settled in. Reason: french name.

- gun, gzero & friends have been renamed : 'gun' was way too
  short ( and french ), 'un' was even worse !

--
Karim Belabas, IMB (UMR 5251)  Tel: (+33) (0)5 40 00 26 17
Universite Bordeaux 1          Fax: (+33) (0)5 40 00 69 50
351, cours de la Liberation    http://www.math.u-bordeaux1.fr/~belabas/
F-33405 Talence (France)       http://pari.math.u-bordeaux1.fr/  [PARI/GP]
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