Re: GOption-multiple arguments with exclude parameters

[Randima Niroshini <randima student unsw edu au>]

Quoting Rick Jones <rick jones2 hp com>:

> Randima Niroshini wrote:
> > Hi all,
> > 
> > I would like to know on passing commandline arguments in different
> contexts
> > using GOption.
> > For an example passing one argument( 1 & 2) and multiple arguments(3) with
> > excluded parameter as follows.
> > 	1) ./parser --scan [FILE]
> > 	2) ./parser --parse [FILE]
> > However, it should be also possible to execute bothoptions at once,without
> > specifying expected file name twice.
> > 	3) ./parser --parse --scan [FILE]
> > 
> > 1 & 2 cases are pretty straightforward to handle with GOption, but would
> like to
> > hear about a mechanism to handle the 3 rd case.
> 
> Am I correct in assuming you want --parse --scan [file] to have the same 
> effect as --parse [file] and --scan [file] ? Yes

> 
> > but,according to the way I used GOption command line parsing, I cannot
> achieve
> > the above.
> > 
> > Here's the code I used..
> > 
> >   gboolean gbverbose = FALSE;
> >   gboolean gbversion = FALSE;
> >   gchar *gcparse = FALSE;
> >   gchar *gcscan=FALSE;
> >   
> >   GError *error = NULL;
> >   
> >   GOptionEntry options[] = {
> >     { "verbose", 0, 0, G_OPTION_ARG_NONE, &gbverbose, "Add verbose output
> to
> > standard log", NULL },
> >     { "version", 0, 0, G_OPTION_ARG_NONE, &gbversion, "Print version
> information
> > on standard output", NULL },
> >     { "parse", 0, 0, G_OPTION_ARG_FILENAME, &gcparse, "Parse the program,
> print
> > errors on standard error", NULL },       
> >     { "scan", 0, 0, G_OPTION_ARG_FILENAME, &gscan, "Scan the file", NULL }
> >     { NULL }
> >   };
> >   
> 
> I think you want to use callback functions.  the callback function for 
> scan and/or parse would check if an argument was passed and if so, set 
> the filename it woudl also set a flag that said that option was seen.
> 
> it would also check if the flag for having seen the other option was set 
> and based on that set or not the apropriate gcparse or gcscan variable 
> when there was an argument passed.
> 
> at least that would be my first take
-- I tried this flag set already and failed since when I say --parse --scan [FILE],
it assigns gcparse to "--scan" and no value assigned to gcscan.
Anyway, will look at call back functions.
> 
> rick jones
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Thanks,

Randima