insch, winsch, mvinsch, mvwinsch - insert a character before cursor in
a curses window
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);
These routines insert the character ch before the character under the
cursor. All characters to the right of the cursor are moved one space
to the right, with the possibility of the rightmost character on the
line being lost. The insertion operation does not change the cursor
All routines that return an integer return ERR upon failure and OK
(SVr4 specifies only "an integer value other than ERR") upon successful
completion, unless otherwise noted in the preceding routine
Functions with a "mv" prefix first perform a cursor movement using
wmove, and return an error if the position is outside the window, or if
the window pointer is null.
These routines do not necessarily imply use of a hardware insert
Note that insch, mvinsch, and mvwinsch may be macros.
These functions are described in the XSI Curses standard, Issue 4.
Comparable functions in the wide-character (ncursesw) library are
described in ins_wch(3NCURSES).