[gradsusr] UDF in open grads 2

[Henrique M. J. Barbosa - IFUSP]

Dear Arlino and all,

I am trying to write my own UDF for using in open grads 2.0.1. However, the
instructions here:

<
http://opengrads.org/wiki/index.php?title=User_Defined_Extensions_in_GrADS_v2.0
>

tell that I should write something like:

#include "gex.h"
int f_hello (void *gex, int argc, char **argv) {
  int rc, i;
  var_t *var;
  /* Evaluate the input expression */
  if ( argc !=1 ) return 1;
  rc = gex_eval(gex,argv[1],var);
(... etc...)

But when I try to compile the example, gcc complains that var_t is
undefined. I already searched the whole opengrads2 source code. The only
definition I could found was inside grads.h, where there is an element of
"struct gavar" which is called "var_t". I also searcher for function
gex_eval() but could not find it anywhere.

Any ideas?
Are users supposed to create UDF with this new semantics??
Or should we stick with grads v1.9 way???

Thanks,
Henrique


-- 
----------------------------------------------------------------
Prof. Henrique M.J. Barbosa          Phone:+[55] (11) 3091 6647
Ed. Basilio Jafet, Sala 100           Cell:+[55] (11) 8380 8001
Dep. de Fisica Aplicada                FAX:+[55] (11) 3091 6749
Instituto de Fisica - USP
Rua do Matao, Travessa R, 187        Skype: hmjbarbosa
05508-900, Sao Paulo, SP, Brazil       msn: hmjbarbosa at yahoo.com
http://www.fap.if.usp.br/~hbarbosa   e-mail: hbarbosa at if.usp.br
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20111201/5c099749/attachment-0003.html