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 charac-
ter under the cursor. All characters to the right of the
cursor are moved one space to the right, with the possi-
bility of the rightmost character on the line being lost.
The insertion operation does not change the cursor posi-
All routines that return an integer return ERR upon fail-
ure and OK (SVr4 specifies only "an integer value other
than ERR") upon successful completion, unless otherwise
noted in the preceding routine descriptions.
Functions with a "mv" prefix first perform a cursor move-
ment 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 character feature.
Note that insch, mvinsch, and mvwinsch may be macros.
These functions are described in the XSI Curses standard,
Comparable functions in the wide-character (ncursesw)
library are described in curs_ins_wch(3x).