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+
+
+ addch, waddch, mvaddch, mvwaddch, echochar, wechochar -
+ add a character (with attributes) to a curses window, then
+ advance the cursor
+
+
+
+SYNOPSIS
+ #include
+
+ 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
+ The addch, waddch, mvaddch and mvwaddch routines put the
+ character ch into the given window at its current window
+ position, which is then advanced. They are analogous to
+ putchar in stdio(3). If the advance is at the right mar-
+ gin, the cursor automatically wraps to the beginning of
+ the next line. At the bottom of the current 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. Backspace moves the cur-
+ sor one character left; at the left edge of a window it
+ does nothing. Newline does a clrtoeol, then moves the
+ cursor to the window left margin on the next line,
+ scrolling the window if on the last line). Tabs are con-
+ sidered to be at every eighth column.
+
+ If ch is any control character other than tab, newline, or
+ backspace, it is drawn in ^X notation. Calling winch
+ after adding a control character does not return the char-
+ acter itself, but instead returns the ^-representation of
+ the control character.
+
+ Video attributes can be combined with a character argument
+ passed to addch or related functions by logical-ORing them
+ into the character. (Thus, text, including attributes,
+ can be copied from one place to another using inch and
+ addch.). See the curs_attr(3X) page for values of prede-
+ fined video attribute constants that can be usefully OR'ed
+ into characters.
+
+ The echochar and wechochar routines are 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 used and, for
+ non-control characters, a considerable performance gain
+ may be seen by using these routines instead of their
+ The following variables may be used to add line drawing
+ characters to the screen with routines of the addch fam-
+ ily. The default character listed below is used if the
+ acsc capability doesn't define a terminal-specific
+ replacement for it (but see the EXTENSIONS section below).
+ The names are taken from VT100 nomenclature.
+
+ l l l _ _ _ l l l. Name Default Description
+ ACS_BLOCK # solid square block ACS_BOARD # board of
+ squares ACS_BTEE + bottom tee ACS_BULLET o bul-
+ let ACS_CKBOARD : checker board (stipple)
+ ACS_DARROW v arrow pointing down
+ ACS_DEGREE ' degree symbol ACS_DIAMOND + dia-
+ mond ACS_GEQUAL > greater-than-or-equal-to
+ ACS_HLINE - horizontal line ACS_LANTERN # lantern
+ symbol ACS_LARROW < arrow pointing left
+ ACS_LEQUAL < less-than-or-equal-to
+ ACS_LLCORNER + lower left-hand corner
+ ACS_LRCORNER + lower right-hand corner
+ ACS_LTEE + left tee ACS_NEQUAL ! not-equal
+ ACS_PI * greek pi ACS_PLMINUS # plus/minus
+ ACS_PLUS + plus ACS_RARROW > arrow pointing
+ right ACS_RTEE + right tee ACS_S1 - scan line 1
+ ACS_S3 - scan line 3 ACS_S7 - scan line 7
+ ACS_S9 _ scan line 9 ACS_STERLING f pound-ster-
+ ling symbol ACS_TTEE + top tee
+ ACS_UARROW ^ arrow pointing up
+ ACS_ULCORNER + upper left-hand corner
+ ACS_URCORNER + upper right-hand corner
+ ACS_VLINE | vertical line
+
+
+
+
+RETURN VALUE
+ All routines return the integer ERR upon failure and OK on
+ success (the SVr4 manuals specify only "an integer value
+ other than ERR") upon successful completion, unless other-
+ wise noted in the preceding routine descriptions.
+
+
+
+NOTES
+ Note that addch, mvaddch, mvwaddch, and echochar may be
+ macros.
+
+
+
+PORTABILITY
+ All these functions are described in the XSI Curses stan-
+ dard, Issue 4. The defaults specified for forms-drawing
+ characters apply in the POSIX locale.
+
+ Some ACS symbols (ACS_S3, ACS_S7, ACS_LEQUAL, ACS_GEQUAL,
+ ACS_PI, ACS_NEQUAL, ACS_STERLING) were not documented in
+ any publicly released System V. However, many publicly
+ available terminfos include acsc strings in which their
+ key characters (pryz{|}) are embedded, and a second-hand
+ ncurses(3X).
+
+
+
+SEE ALSO
+ curses(3X), curs_attr(3X), curs_clear(3X), curs_inch(3X),
+ curs_outopts(3X), curs_refresh(3X), putc(3S).
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