ADDCH(3XCURSES)ADDCH(3XCURSES)NAME
addch, mvaddch, mvwaddch, waddch - add a character (with rendition) to
a window
SYNOPSIS
cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib \
-R /usr/xpg4/lib -lcurses [ library... ]
c89 [ flag... ] file... -lcurses [ library ... ]
#include <curses.h>
int addch(const chtype ch);
int mvaddch(int y, int x, const chtype ch);
int mvwaddch(WINDOW *win, int y, int x, const chtype ch);
int waddch(WINDOW *win, const chtype ch);
DESCRIPTION
The addch() function writes a character to the stdscr window at the
current cursor position. The mvaddch() and mvwaddch() functions write
the character to the position indicated by the x (column) and y (row)
parameters. The mvaddch() function writes the character to the stdscr
window, while mvwaddch() writes the character to the window specified
by win. The waddch() function is identical to addch(), but writes the
character to the window specified by win.
These functions advance the cursor after writing the character. Charac‐
ters that do not fit on the end of the current line are wrapped to the
beginning of the next line unless the current line is the last line of
the window and scrolling is disabled. In that situation, characters
which extend beyond the end of the line are discarded.
When ch is a backspace, carriage return, newline, or tab, X/Open Curses
moves the cursor appropriately. Each tab character moves the cursor to
the next tab stop. By default, tab stops occur every eight columns.
When ch is a control character other than backspace, carriage return,
newline, or tab, it is written using ^x notation, where x is a print‐
able character. When X/Open Curses writes ch to the last character
position on a line, it automatically generates a newline. When ch is
written to the last character position of a scrolling region and scrol‐
lok() is enabled, X/Open Curses scrolls the scrolling region up one
line (see clearok(3XCURSES)).
PARAMETERS
wchstr
Is a pointer to the cchar_t string to be copied to the win‐
dow.
n
Is the maximum number of characters to be copied from wchstr.
If n is less than 0, the entire string is written or as much
of it as fits on the line.
y
Is the y (row) coordinate of the starting position of wchstr
in the window.
x
Is the x (column) coordinate of the starting position of wch‐
str in the window.
win
Is a pointer to the window to which the string is to be
copied.
RETURN VALUES
On success, these functions return OK. Otherwise, they return ERR.
ERRORS
None.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────┬─────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼─────────────────┤
│Interface Stability │ Standard │
├────────────────────┼─────────────────┤
│MT-Level │ Unsafe │
└────────────────────┴─────────────────┘
SEE ALSOattroff(3XCURSES), bkgdset(3XCURSES), doupdate(3XCURSES),
inch(3XCURSES), insch(3XCURSES), libcurses(3XCURSES), nl(3XCURSES),
printw(3XCURSES), scrollok(3XCURSES), scrl(3XCURSES), terminfo(4),
attributes(5), standards(5)
Jun 5, 2002 ADDCH(3XCURSES)
