'touchcell' functions?

[Bill Gray]

int touchline(WINDOW *win, int start, int count);
bool is_linetouched(WINDOW *win, int line);

   enable one to 'touch' an (entire) line and to determine if (some or 
all of) a given line has been touched.  There are situations involving 
partially overlapping windows where one might want to 'touch' a range of 
cells within a line or determine if (some or all of) a range of cells 
within a line had been touched,  rather than touching or checking the 
entire line.

   I'm thinking along the lines of functions such as

int touchcells( WINDOW *win, int line, int column, int n_cols, int changed);
bool is_celltouched( const WINDOW *win, int line, int column);

   and possibly

bool are_cellstouched( const WINDOW *win, int line, int column, int n_cols);

   Am I correct in thinking that these functions don't exist,  in 
ncurses or elsewhere?  (PDCurses and PDCursesMod provide some of this 
information,  but only by examining internal WINDOW struct data.)

Thanks!       -- Bill