Go to main content

man pages section 3: Curses Library Functions

Exit Print View

Updated: Thursday, June 13, 2019
 
 

waddch(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. Characters 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 printable 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 scrollok() 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 window.

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 wchstr 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(7) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Interface Stability
Committed
MT-Level
Unsafe
Standard

See Also

attroff(3XCURSES), bkgdset(3XCURSES), doupdate(3XCURSES), inch(3XCURSES), insch(3XCURSES), libcurses(3XCURSES), nl(3XCURSES), printw(3XCURSES), scrl(3XCURSES), scrollok(3XCURSES), terminfo(5), attributes(7), standards(7)