Re: [cocci] Does SmPL support regex groups?

[Eric Wheeler <cocci@lists.ewheeler.net>]

On Tue, 22 Mar 2022, Nicolas Palix wrote:
> For the record, is it the expected SmPL ?
> 
> @ fu @
> identifier F,file_chooser;
> parameter list PL;
> expression list EL1, EL2;
> constant U =~ "untitled";
> @@
> 
> F(PL)
> {
>     ...
>     file_chooser = Open_Filechooser(EL1, U, EL2);
>     ...
> }
> 
> @script:python py@
> U << fu.U;
> C;
> @@
> 
> print U # Rewrite U to extract the extension
> coccinelle.C = cocci.make_expr("\".gplot\"")

The extension varies, there were half a dozen or so: I had to replace 
several Open_Filechooser() calls that had different extensions.  Here is 
the diff for that commit:
    https://github.com/KJ7LNW/xnec2c/commit/9fb0381c24365311e3bb1fc8158f18112864ebfb#diff-1d0efcfbefd013aedf0477bd522a1e4506339c5ef239a6ef770f39270747c14cL222

Here is one such diff for .png:
  file_chooser = Open_Filechooser( GTK_FILE_CHOOSER_ACTION_SAVE,
-      "*.png", NULL, "untitled.png", rc_config.working_dir );
+      "*.png", NULL, get_nec_filename_stem(newfn, ".png", PATH_MAX),
      rc_config.working_dir );

I'm not so familiar with Python, so forgive my likely incorrect syntax, 
but this might work:

	coccinelle.C = re.match("(\..*)$", U).group(1)

-Eric

> @ replace_untitled @
> identifier F,file_chooser;
> parameter list PL;
> expression list EL1, EL2;
> constant fu.U;
> expression py.C;
> @@
> 
> F(PL)
> {
> +   char newfn[PATH_MAX];
>     ...
>     file_chooser = Open_Filechooser(EL1,
> -       U,
> +       get_nec_filename_stem(newfn, C, PATH_MAX),
> 	EL2);
>     ...
> }
> 
> 
> 
> -- 
> Nicolas Palix
>