vcursor-get-char-count

vcursor-get-char-count is a compiled Lisp function in `vcursor.el'.

(vcursor-get-char-count FUNC &rest ARGS)

Apply FUNC to ARGS ... and return the number of characters moved.
Point is temporarily set to the virtual cursor position before FUNC
is called.

This is called by most of the virtual-cursor copying commands to find
out how much to copy.