curs_addch man page on DigitalUNIX

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curs_addch(3X)							curs_addch(3X)

       addch, waddch, mvaddch, mvwaddch, echochar, wechochar - add a character
       (with attributes) to a curses window, then advance the cursor

       #include <ncurses.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);

       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 margin, 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 appropri‐
       ately within the window.	 Backspace  moves  the	cursor	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 considered
       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 char‐
       acter does not return the character 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 predefined video attribute constants that can be usefully OR'ed into

       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  out‐
       put is used and, for non-control characters, a considerable performance
       gain may 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.	 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.

       Name	      Default	Description
       ACS_BLOCK      #		solid square block
       ACS_BOARD      #		board of squares
       ACS_BTEE	      +		bottom tee
       ACS_BULLET     o		bullet

       ACS_CKBOARD    :		checker board (stipple)
       ACS_DARROW     v		arrow pointing down
       ACS_DEGREE     '		degree symbol
       ACS_DIAMOND    +		diamond
       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-sterling 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

       All routines return the integer ERR upon failure and OK on success (the
       SVr4  manuals specify only "an integer value other than ERR") upon suc‐
       cessful completion, unless otherwise noted  in  the  preceding  routine

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

       All  these functions are described in the XSI Curses standard, Issue 4.
       The defaults specified for forms-drawing characters apply in the	 POSIX

       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  list  of  their  character descriptions has come to light.
       The ACS-prefixed names for them were invented for ncurses(3X).

       curses(3X),  curs_attr(3X),  curs_clear(3X),  curs_inch(3X),  curs_out‐
       opts(3X), curs_refresh(3X), putc(3S).


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