Generic list manipulation function in C?

Question

What is a generic list manipulation function in C? (I saw this when I was going through some materials.)

What is the difference between this function and a function

Answer 1

C and its standard library don't offer any list specific functions.

But there are libraries with many useful functions for C that support data types known from other programming languages: http://library.gnome.org/devel/glib/2.18/glib-data-types.html