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addch(3curses)
curs_addch(3CURSES) Curses Library Functions curs_addch(3CURSES)
NAME
curs_addch, addch, waddch, mvaddch, mvwaddch, echochar, wechochar - add
a character (with attributes) to a curses window and advance cursor
SYNOPSIS
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);
DESCRIPTION
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 func‐
tion is similar to that of putchar(). At the right margin, an automatic
newline is performed. At the bottom of the scrolling region, if scrol‐
lok() is enabled, the scrolling region is scrolled up one line.
If ch is a tab, newline, or backspace, the cursor is moved appropri‐
ately within the window. A newline also does a clrtoeol() before mov‐
ing. Tabs are considered to be at every eighth column. If ch is another
control character, it is drawn in the ^X notation. Calling winch() af‐
ter 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-con‐
trol characters, a considerable performance gain might be seen by using
these routines instead of their equivalents.
Line Graphics
The following variables may be used to add line drawing characters to
the screen with routines of the addch() family. When variables are de‐
fined 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.
tab() box; lw(1.83i) |lw(1.25i) |lw(2.42i) lw(1.83i) |lw(1.25i)
|lw(2.42i) NameDefaultGlyph 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_DIA‐
MOND+diamond _ ACS_CKBOARD:checker board (stipple) _ ACS_DEGREE'degree
symbol _ ACS_PLMINUS#plus/minus _ ACS_BULLETobullet _ ACS_LARROW<arrow
pointing left _ ACS_RARROW>arrow pointing right _ ACS_DARROWvarrow
pointing down _ ACS_UARROW^arrow pointing up _ ACS_BOARD#board of
squares _ ACS_LANTERN#lantern symbol _ ACS_BLOCK #solid square block
RETURN VALUES
All routines return the integer ERR upon failure and an integer value
other than ERR upon successful completion.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ MT-LevelUnsafe
SEE ALSO
curs_refresh(3CURSES), curs_attr(3CURSES), curs_clear(3CURSES),
curs_inch(3CURSES), curs_outopts(3CURSES), curses(3CURSES), putc(3C),
attributes(7)
NOTES
The header <curses.h> automatically includes the headers <stdio.h> and
<unctrl.h>.
Note that addch(), mvaddch(), mvwaddch(), and echochar() may be macros.
Oracle Solaris 11.4 31 Dec 1996 curs_addch(3CURSES)