Date: Mon, 3 Dec 2012 03:14:54 -0300
From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: david@fetter.org, rk204885@gmail.com
Cc: pgsql-general@postgresql.org, w^3 <pgsql-www@postgresql.org>
Subject: MODERATOR WARNING  Re: [GENERAL] Exception Handling in C-Language
	Functions?
Message-ID: <20121203061454.GB4601@alvh.no-ip.org>
References: <1354511937712-5734656.post@n5.nabble.com>
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MODERATOR WARNING

I noticed that this guy Rahul seems to be reinjecting old list emails
somehow.  Please don't approve anything coming from him.  Observe this
example:

http://postgresql.1045698.n5.nabble.com/Re-GENERAL-MS-Access-and-Stored-pro=
cedures-td1843848.html
http://postgresql.1045698.n5.nabble.com/Re-GENERAL-MS-Access-and-Stored-pro=
cedures-td5734652.html
The original message was posted in 2005!

The message here is this one (also in 2005):
http://postgresql.1045698.n5.nabble.com/GENERAL-Exception-Handling-in-C-Lan=
guage-Functions-td1843896.html

I have no idea what's going on.  Maybe it's something to do with Nabble.
There are others pending moderation in pgsql-admin and pgsql-hackers too.

rahul143 wrote:
> I have the created a C-Language function (code is below).  Now, I=20
> wonder: How do I handle exceptions, for example if malloc cannot assign=
=20
> the necessary memory?  Do "palloc" and "pfree" handle such a case=20
> cleanly?  Should I simply use an "assert"?=20
>=20
> #include "postgres.h"=20
> #include <string.h>=20
> #include <stdlib.h>=20
> #include "fmgr.h"=20
> #include "libinn.h"=20
>=20
> PG_FUNCTION_INFO_V1(ffiinews_uwildmat);=20
>=20
> /* Wrapper for INN's function uwildmat.  Needs parameters in UTF-8. */=20
> Datum ffiinews_uwildmat(PG_FUNCTION_ARGS) {=20
>     VarChar *text =3D PG_GETARG_VARCHAR_P(0);=20
>     VarChar *pattern =3D PG_GETARG_VARCHAR_P(1);=20
>     int text_len =3D VARSIZE(text)-VARHDRSZ;=20
>     int pattern_len =3D VARSIZE(pattern)-VARHDRSZ;=20
>     char *tmp_text =3D (char *)malloc(text_len+1);=20
>     if (tmp_text =3D=3D NULL)=20
>         ; /* What now? */=20
>     char *tmp_pattern =3D (char *)malloc(pattern_len+1);=20
>     if (tmp_pattern =3D=3D NULL)=20
>         ; /* What now? */=20
>     strncpy(tmp_text, VARDATA(text), text_len);=20
>     tmp_text[text_len] =3D '\0';=20
>     strncpy(tmp_pattern, VARDATA(pattern), pattern_len);=20
>     tmp_pattern[pattern_len] =3D '\0';=20
>     bool matches =3D uwildmat(tmp_text, tmp_pattern);=20
>=20
>=20
>=20
> -----
>=20
>=20
>=20
>=20
> --
> View this message in context: http://postgresql.1045698.n5.nabble.com/GEN=
ERAL-Exception-Handling-in-C-Language-Functions-tp5734656.html
> Sent from the PostgreSQL - general mailing list archive at Nabble.com.
>=20
>=20
> --=20
> Sent via pgsql-general mailing list (pgsql-general@postgresql.org)
> To make changes to your subscription:
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--=20
=C1lvaro Herrera                http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services


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