Re: [Gnuplot-info] name of current script

[Thomas S. <t.s...@fz...>]

the best place to set such a variable would be the
'load_file()' routine in 'misc.c'.

two lines need to be added there:

--- misc.c.orig 2011-03-08 15:15:32.240304167 +0100
+++ misc.c      2011-03-09 18:00:13.300516216 +0100
@@ -215,6 +215,8 @@
     lf_push(fp, name, NULL); /* save state for errors and recursion */
     do_load_arg_substitution = can_do_args;
 
+    fill_gpval_string("GPVAL_LOAD_FILE", name);
+
     if (fp == (FILE *) NULL) {
        os_error(c_token, "Cannot open %s file '%s'",
                 can_do_args ? "call" : "load", name);
@@ -286,6 +288,8 @@
        }
     }
 
+    fill_gpval_string("GPVAL_LOAD_FILE", "");
+
     /* pop state */
     (void) lf_pop();           /* also closes file fp */
 }


Robbie Morrison wrote:
> 
> 
> Hello all
> 
> It would be rather useful if the current filename was
> available from within a gnuplot script.
> 
> This suggestion was raised in 2008 and 2009
> respectively:
> 
>  
> http://groups.google.com/group/comp.graphics.apps.gnuplot/browse_thread/thread/2b34fa67a0365173/8f8c63c891f59aeb?lnk=gst&q=%22current+filename%22#8f8c63c891f59aeb
>  
> http://groups.google.com/group/comp.graphics.apps.gnuplot/browse_thread/thread/781545ccfbaada56/ebffa12161a37fe3?lnk=gst&q=%22get+filename%22#ebffa12161a37fe3
> 
> And, AFAIK, has not been resolved.
> 
> One approach might be:
> 
> assume the file 'myfile.gp' contains the lines:
> 
>     myfile = GPVAL_LOAD_FILE
>     print "myfile = ", myfile
> 
> then entering the command:
> 
>     load "myfile.gp"
> 
> would display either of the following -- the first
> being a simple echo and the second being the canonical
> file path:
> 
>     myfile = myfile.gp
>     myfile = /path/to/myfile.gp
> 
> On termination, GPVAL_LOAD_FILE would be unset.
> 
> Another approach (probably too late) would have been
> to have the 'call' command assign the filename to $0
> in line with most other shell positional variable
> conventions.
> 
> If there is a work-around, that would be good to know.
> 
> best wishes
> Robbie
> ---
> Robbie Morrison
> PhD student -- policy-oriented energy system simulation
> Technical University of Berlin (TU-Berlin), Germany
> University email (redirected) : mor...@ie...
> Webmail (preferred)           : ro...@ac...
> [from Webmail client]
> 
> 
> 
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