curs_insch
Section: Library calls (3X)
Updated: 202-0-08
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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(3X),
winsch
does not advance the cursor.
ncurses(3X) describes the variants of this function.
RETURN VALUE
These functions return
OK
on success and
ERR
on failure.
In
ncurses,
they return
ERR
if
.IP * 4
the
curses
screen has not been initialized,
or
.IP * 4
(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
curs_ins_wch(3X) describes comparable functions in the
wid-character
curses
configuration.
curses(3X),
terminfo(5)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- NOTES
-
- PORTABILITY
-
- HISTORY
-
- SEE ALSO
-
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