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Subject: Re: Determination for the number of named function parameters (with SmPL)
From: Mark D Rustad <mrustad@gmail.com>
In-Reply-To: <547C4D11.1050206@users.sourceforge.net>
Date: Tue, 2 Dec 2014 08:30:23 -0800
Cc: kernel-janitors@vger.kernel.org, Coccinelle <cocci@systeme.lip6.fr>,
        LKML <linux-kernel@vger.kernel.org>
Message-Id: <8DDAD79C-96D4-43BA-BC3F-F9EE237D2C60@gmail.com>
References: <547C4D11.1050206@users.sourceforge.net>
To: SF Markus Elfring <elfring@users.sourceforge.net>
Sender: linux-kernel-owner@vger.kernel.org


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On Dec 1, 2014, at 3:12 AM, SF Markus Elfring =
<elfring@users.sourceforge.net> wrote:

> Hello,
>=20
> Would you like to know how many named function parameters are used in =
the source files?
>=20
> How do you think about to try the following semantic query approach =
out a bit more?
>=20
> @initialize:python@
> @@
> import sys
> import sqlite3 as SQLite
> connection =3D SQLite.connect(":memory:")
> c =3D connection.cursor()
> c.execute("""create table numbers (number integer)""")
> delimiter =3D "|"
>=20
> def store_number(count):
>    """Add an integer to an internal list."""
>    c.execute("""insert into numbers (number) values (?)""",
>              (count, )
>             )
>=20
> @counting_parameters@
> identifier work;
> parameter list[number] pl;
> type return_type;
> @@
> return_type work(pl)
> {
>  ...
> }
>=20
> @script:python collection@
> count << counting_parameters.number;
> @@
> store_number(count)
>=20
> @finalize:python@
> @@
> c.execute("""select count(*) nr from numbers""")
> result =3D c.fetchone()
>=20
> if result[0] > 0:
>   c.execute("""create index x on numbers (number)""")
>   c.execute("select number, count(*) nr from numbers group by number")
>   sys.stdout.write(delimiter.join( ("number", "counter") ))
>   sys.stdout.write("\r\n")
>   for result in c:
>      sys.stdout.write(delimiter.join((str(result[0]),
>                                       str(result[1])
>                                      )))
>      sys.stdout.write("\r\n")
> else:
>   sys.stderr.write("No result for this analysis!\n")
>=20
> connection.close()
>=20
>=20
>=20
> elfring@Sonne:~/Projekte/Coccinelle/Probe> XX=3D$(date) && spatch.opt =
-timeout 12 -sp-file list_parameter_numbers1.cocci -dir =
/usr/src/linux-stable > list_parameter_numbers1.txt 2> =
list_parameter_numbers1-errors.txt ; YY=3D$(date) && echo "$XX * $YY"
> ...
> elfring@Sonne:~/Projekte/Coccinelle/Probe> cat =
list_parameter_numbers1.txt
> number|counter
> 0|29

I think the results are dubious. Only 29 functions with no parameters? =
That can't be right.

> 1|18261
> 2|15374
> 3|12237
> 4|8159
> 5|4339
> 6|2701
> 7|1183
> 8|518
> 9|260
> 10|146
> 11|83
> 12|42
> 13|21
> 14|9
> 15|7
> 16|2
> 17|4
> 18|1
> 21|1
> 22|1
>=20
>=20
> Do you find such an analysis result from the source files for Linux =
3.17.4
> interesting for further considerations?
>=20
> Regards,
> Markus
> --
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--=20
Mark Rustad, MRustad@gmail.com


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