curs_addwch(3CURSES) Curses Library Functions curs_addwch(3CURSES)NAME
curs_addwch, addwch, waddwch, mvaddwch, mvwaddwch, echowchar,
wechowchar - add a wchar_t character (with attributes) to a curses win‐
dow and advance cursor
SYNOPSIS
cc [flag...] file... -lcurses [library...]
#include<curses.h>
int addwch(chtype wch);
int waddwch(WINDOW *win, chtype wch);
int mvaddwch(int y, int x, chtype wch);
int mvwaddwch(WINDOW *win, int y, int x, chtype wch);
int echowchar(chtype wch);
int wechowchar(WINDOW *win, chtype wch);
DESCRIPTION
The addwch(),waddwch(),mvaddwch(), and mvwaddwch() routines put the
character wch, holding a wchar_t character, 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 putwchar(3C) in
the C multibyte library. 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 wch is a tab, newline, or backspace, the cursor is moved appropri‐
ately within the window. A newline also does a clrtoeol(3CURSES)
before moving. Tabs are considered to be at every eighth column. If
wch is another control character, it is drawn in the ^X notation. Call‐
ing winwch(3CURSES) 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 wchar_t 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 inwch() and addwch().) See stand‐
out(3CURSES), predefined video attribute constants.
The echowchar() and wechowchar() routines are functionally equivalent
to a call to addwch() followed by a call to refresh(3CURSES), or a
call to waddwch() followed by a call to wrefresh(3CURSES). The knowl‐
edge that only a single character is being output is taken into consid‐
eration and, for non-control characters, a considerable performance
gain might be seen by using these routines instead of their equiva‐
lents.
Line Graphics
The following variables may be used to add line drawing characters to
the screen with routines of the addwch() 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_RARRROW │> │ 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 │ │ │
└────────────────────┴────────────────────┴─────────────────────────┘
RETURN VALUE
All routines return the integer ERR upon failure and an integer value
other than ERR upon successful completion, unless otherwise noted in
the preceding routine descriptions.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │Unsafe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOputwchar(3C), clrtoeol(3CURSES), curses(3CURSES), curs_attr(3CURSES),
curs_inwch(3CURSES), curs_outopts(3CURSES), refresh(3CURSES), stand‐
out(3CURSES), winwch(3CURSES), wrefresh(3CURSES), attributes(5)NOTES
The header file <curses.h> automatically includes the header files
<stdio.h>, <unctrl.h> and <widec.h>.
Note that addwch(), mvaddwch(), mvwaddwch(), and echowchar() may be
macros.
None of these routines can use the color attribute in chtype.
SunOS 5.10 31 Dec 1996 curs_addwch(3CURSES)
