curs_addch, addch, waddch, mvaddch, mvwaddch, echochar,
wechochar - Add a character (with attributes) to a Curses
window and advance the cursor
#include <curses.h>
int addch(
const chtype ch ); int waddch(
WINDOW *win,
const chtype ch ); int mvaddch(
int y,
int x,
const chtype ch ); int mvwaddch(
WINDOW *win,
int y,
int x,
const chtype ch ); int echochar(
const chtype ch ); int wechochar(
WINDOW *win,
const chtype ch );
Curses Library (libcurses)
Interfaces documented on this reference page conform to
industry standards as follows:
addch, waddch, mvaddch, mvwaddch, echochar,
wechochar: XCURSES4.2
Refer to the standards(5) reference page for more information
about industry standards and associated tags.
The addch, waddch, mvaddch, and mvwaddch routines put the
character ch into the window at the current cursor position
of the window and advance the position of the window
cursor. Their function is similar to that of the putchar
function. 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, these functions
move the cursor appropriately within the window. A newline
also performs 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.
Video attributes can be combined with a character in a
parameter through an inclusive OR operation. This operation
also sets these attributes. (The intent here is to
allow text, including attributes, to be copied from one
place to another by using inch and addch. See the discussion
on standout, predefined video attribute constants, in
the curs_attr(3) reference 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 may be realized
by using these routines instead of their equivalents.
Line Graphics [Toc] [Back]
The following variables may be used with routines of the
addch family to add line-drawing characters to the screen.
When variables are defined for the terminal, the
A_ALTCHARSET bit is turned on (see curs_attr(3)). Otherwise,
the default character specified in the following
list is stored in the variable. The names chosen for variables
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
-------------------------------------------------
The header file <curses.h> automatically includes the
header file <stdio.h>.
Note that addch, mvaddch, mvwaddch, and echochar may be
macros.
All routines return the integer ERR upon failure and OK
upon successful completion.
Functions: curses(3), curs_attr(3), curs_clear(3),
curs_inch(3), curs_outopts(3), curs_refresh(3), putc(3)
Others: standards(5)
curs_addch(3)
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