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Copyright 1989 AT&T
Portions Copyright (c) 1996, Sun Microsystems, Inc. All Rights Reserved.
The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
curs_addch, addch, waddch, mvaddch, mvwaddch, echochar, wechochar - add a character (with attributes) to a curses window and advance cursor

cc [ flag ... ] file ... -lcurses [ library .. ]
#include <curses.h>

int addch(chtype ch);

int waddch(WINDOW *win, chtype ch);

int mvaddch(int y, int x, chtype ch);

int mvwaddch(WINDOW *win, int y, int x, chtype ch);

int echochar(chtype ch);

int wechochar(WINDOW *win, chtype ch);

With the addch(), waddch(), mvaddch(), and mvwaddch() routines, the character ch is put into the window at the current cursor position of the window and the position of the window cursor is advanced. Its function is similar to that of putchar(). At the right margin, an automatic newline is performed. At the bottom of the scrolling region, if scrollok() is enabled, the scrolling region is scrolled up one line.

If ch is a tab, newline, or backspace, the cursor is moved appropriately within the window. A newline also does a clrtoeol() before moving. Tabs are considered to be at every eighth column. If ch is another control character, it is drawn in the ^X notation. Calling winch() after adding a control character does not return the control character, but instead returns the representation of the control character. See curs_inch(3CURSES).

Video attributes can be combined with a character by OR-ing them into the parameter. This results in these attributes also being set. (The intent here is that text, including attributes, can be copied from one place to another using inch() and addch().) (see standout(), predefined video attribute constants, on the curs_attr(3CURSES) page).

The echochar() and wechochar() routines are functionally equivalent to a call to addch() followed by a call to refresh(), or a call to waddch followed by a call to wrefresh(). The knowledge that only a single character is being output is taken into consideration and, for non-control characters, a considerable performance gain might be seen by using these routines instead of their equivalents.

The following variables may be used to add line drawing characters to the screen with routines of the addch() family. When variables are defined for the terminal, the A_ALTCHARSET bit is turned on (see curs_attr(3CURSES)). Otherwise, the default character listed below is stored in the variable. The names chosen are consistent with the VT100 nomenclature.

Name Default Glyph Description

ACS_ULCORNER + upper left-hand corner

ACS_LLCORNER + lower left-hand corner

ACS_URCORNER + upper right-hand corner

ACS_LRCORNER + lower right-hand corner

ACS_RTEE + right tee

ACS_LTEE + left tee

ACS_BTEE + bottom tee

ACS_TTEE + top tee

ACS_HLINE - horizontal line

ACS_VLINE | vertical line

ACS_PLUS + plus

ACS_S1 - scan line 1

ACS_S9 - scan line 9

ACS_DIAMOND + diamond

ACS_CKBOARD : checker board (stipple)

ACS_DEGREE ' degree symbol

ACS_PLMINUS # plus/minus

ACS_BULLET o bullet

ACS_LARROW < arrow pointing left

ACS_RARROW > arrow pointing right

ACS_DARROW v arrow pointing down

ACS_UARROW ^ arrow pointing up

ACS_BOARD # board of squares

ACS_LANTERN # lantern symbol

ACS_BLOCK # solid square block

All routines return the integer ERR upon failure and an integer value other than ERR upon successful completion.

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE

MT-Level Unsafe

putc (3C), curs_attr (3CURSES), curs_clear (3CURSES), curs_inch (3CURSES), curs_outopts (3CURSES), curs_refresh (3CURSES), curses (3CURSES), attributes (7)

The header <curses.h> automatically includes the headers <stdio.h> and <unctrl.h>.

Note that addch(), mvaddch(), mvwaddch(), and echochar() may be macros.