NAME

       insch, winsch, mvinsch, mvwinsch - insert a curses character in a window

SYNOPSIS

       #include <curses.h>

       int insch(chtype ch);
       int winsch(WINDOW * win, chtype ch);
       int mvinsch(int y, int x, chtype ch);
       int mvwinsch(WINDOW * win, int y, int x, chtype ch);

DESCRIPTION

       winsch  inserts  the  curses  character  ch  at  the  cursor  position  in the window win.  The character
       previously at the cursor and any to its right  move  one  cell  to  the  right;  the  formerly  rightmost
       character  on  the  line  is  discarded.   Unlike  addch(3NCURSES),  winsch  does not advance the cursor.
       ncurses(3NCURSES) describes the variants of this function.

RETURN VALUE

       These functions return OK on success and ERR on failure.

       In ncurses, they return ERR if

       •   the curses screen has not been initialized, or

       •   (for functions taking a WINDOW pointer argument) win is a null pointer.

       Functions prefixed with “mv” first perform cursor movement and fail if the position (y, x) is outside the
       window boundaries.

NOTES

       insch, mvinsch, and mvwinsch may be implemented as macros.

       curses does  not  necessarily  employ  the  terminal's  insert_character  (ich1)  capability  to  achieve
       insertion.

PORTABILITY

       X/Open Curses Issue 4 describes these functions.  It specifies no error conditions for them.

       SVr4 describes a successful return value only as “an integer value other than ERR”.

HISTORY

       SVr2 (1984) introduced these functions.

SEE ALSO

       ins_wch(3NCURSES) describes comparable functions in the wide-character curses configuration.

       ncurses(3NCURSES), terminfo(5)

ncurses 6.5                                        2025-03-08                                    insch(3NCURSES)