From: | Alessandro Baretta <alex(at)baretta(dot)com> |
---|---|
To: | PostgreSQL Hackers Mailing List <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Arrays and FFTW |
Date: | 2002-07-20 08:30:30 |
Message-ID: | 3D391FA6.2020902@baretta.com |
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Lists: | pgsql-hackers |
Joe Conway wrote:
>
> Also see contrib/array, contrib/dblink, and contrib/intarray (and
> probably others under contrib) for user function examples which handle
> arrays. And be sure to see:
> http://www.postgresql.org/idocs/index.php?xfunc-c.html
> for general information on user C language functions.
>
> Joe
I read that already, but it does not mention how arrays are
passed to a C function. I need some examples. Now I have
some places to look for. Now, I'll download the source and
take a look at it. Hopefully, it will not be too difficult
to figure out how arrays are passed to C functions. The docs
*seem* to imply that I will get a blob of memory where the
first 4 bytes are the size_t of the array, and the rest is
the array itself. However, this is not clearly stated, so I
could have misunderstood this point. PostgreSQL is a great
thing, but the documentation is a little too tight in a few
spots. I managed to wade through most of it--I'd hate to get
an RTFM from you guys--but I wish it were a little more
explicative.
Thanks to everybody for the kind help. Good work. I'll get
back to mine momentarily.
Alex
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