> > Which algorithm will become sufficient for your data processing needs
> > around the usage of functions with variadic arguments because of format
> > strings?
>
> Actually, I really didn't get why you're asking about that.
I suggest to take another look at affected software aspects.
>
> OK, if you may have more than one argument to your print,
> then you can find the offset using an expression list metavariable:
>
> @r@
> expression list[n] between;
> @@
>
> print(s,between,h2->name,...)
>
> Then you can use r.n in your python rule to figure out where is the %s to
> change.
Unfortunately, it doesn't work. But, I am working on some solutions using
Python.
therefore, once we have something like:
...
@r1@
format list fl;
identifier fn;
expression list e;
position p;
@@
fn("%@fl@", e@p)
Then, I could handle the *format list* using *make_expr()* as well. But, Is
> OK, if you may have more than one argument to your print,
> then you can find the offset using an expression list metavariable:
How challenging would it be to add support for the construction
of such expression lists by programming interfaces (besides “make_expr”)
of Coccinelle's software
After some research, I could create a Python function called
fmt_replace_by_pos() to replace the %fmt by the Indice position.
*1. Input test*
int foo() {
int id;
struct mydata h1, *h2, s1, *s2;
char *city = "Hello";
my_printf("test: char*=%s mydata=%s int=%d mydata*=%s (*mydata)=%s",
