curs_addch man page on Ultrix

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curs_addch(3X)							curs_addch(3X)

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

SYNOPSIS
       #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
       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.  (To emit control characters
       literally, use echochar.)

       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
       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 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_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
       ACS_S3	      -		scan line 3
       ACS_S7	      -		scan line 7
       ACS_LEQUAL     <		less-than-or-equal-to
       ACS_GEQUAL     >		greater-than-or-equal-to
       ACS_PI	      *		greek pi
       ACS_NEQUAL     !		not-equal
       ACS_STERLING   f		pound-sterling symbol

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  suc‐
       cessful	completion,  unless  otherwise	noted in the preceding routine
       descriptions.

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

EXTENSIONS
       The following extended curses features are available only  on  PC-clone
       consoles	 and  compatible terminals obeying the ANSI.SYS de-facto stan‐
       dard for terminal control sequences.  They are not part of XSI curses.

       The attribute A_ALTCHARSET actually forces literal display  of  PC  ROM
       characters  including  the high-half graphics.  Your console driver may
       still capture or translate a few (such as ESC) but this feature	should
       give  you  access  to  the card-suit characters, up and down-arrow, and
       most others in the range 0-32.  (In a terminfo entry designed  for  use
       with   ncurses,	the  high-half	characters  are	 obtained  using  this
       attribute with an acsc string in which the second of  each  pair	 is  a
       high-half character.)

       Giving  wechochar  an  argument	with its high bit set will produce the
       corresponding high-half ASCII graphic (SVr4 curses also has  this  fea‐
       ture but does not document it).	A control-character argument, however,
       will not typically produce the corresponding graphic;  characters  such
       as  CR,	NL, FF and TAB are typically interpreted by the console driver
       itself, and ESC	will  be  interpreted  as  the	leader	of  a  control
       sequence.

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

       The  seven  ACS symbols starting with ACS_S3 were not documented in any
       publicly released System V.  However, many publicly available terminfos
       include acsc strings in which their key characters (pryz{|}) are embed‐
       ded, and a second-hand list of their character descriptions has come to
       light.  The ACS-prefixed names for them were invented for ncurses(3X).

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

								curs_addch(3X)
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