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List:       python-db-sig
Subject:    [PYTHON DB-SIG] Re: New Oracledb module now available
From:       Anthony Baxter <arb () connect ! com ! au> (Anthony Baxter)
Date:       1997-03-25 11:15:39
Message-ID: 199703251115.WAA21924 () jambu ! off ! connect ! com ! au
[Download RAW message or body]


>>> I wrote
> Don't suppose you had a chance to look at the 
> (d is of type dbiDate)
> if d:
> segfaults? I'm still waiting for our licenses for the Sun debugger to
> turn up so I can pound on this.

Well, here's the fix. It seems that you must define nb_nonzero for 
anything with tp_as_number set. Objects/objects.c, line 411 in 1.4 source.

(no, I didn't know about it either)

My fix makes it so a dbiDate object is "true" if it's not 01/01/1970. An
alternate is to simply make it always "true", by make dt_nb_nonzero always
return 1. This is something that's not covered by the DB-SIG API.

Anthony

*** dbi.c.dist  Tue Mar 25 21:47:06 1997
--- dbi.c       Tue Mar 25 21:58:23 1997
***************
*** 127,132 ****
--- 127,134 ----
  { return delg(a)->nb_add(dbiValue(a),b); }
  static PyObject* dt_nb_subtract(PyObject* a, PyObject* b)
  { return delg(a)->nb_subtract(dbiValue(a),b); }
+ static int dt_nb_nonzero(PyObject* a)
+ { return (delg(a)->nb_int(dbiValue(a)) != 0); }
  static PyObject* dt_nb_int(PyObject* a)
  { return delg(a)->nb_int(dbiValue(a)); }
  static PyObject* dt_nb_long(PyObject* a)
***************
*** 152,158 ****
    0,   /* nb_negative */
    0,   /* nb_positive */
    0,   /* nb_absolute */
!   0,   /* nb_nonzero */
    0,   /* nb_invert */
    0,   /* nb_lshift */
    0,   /* nb_rshift */
--- 154,160 ----
    0,   /* nb_negative */
    0,   /* nb_positive */
    0,   /* nb_absolute */
!   dt_nb_nonzero,   /* nb_nonzero */
    0,   /* nb_invert */
    0,   /* nb_lshift */
    0,   /* nb_rshift */


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