echo_wchar man page on DigitalUNIX

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curs_add_wch(3)						       curs_add_wch(3)

       curs_add_wch,  add_wch,	wadd_wch,  mvadd_wch,  mvwadd_wch, echo_wchar,
       wecho_wchar - Add a complex character and rendition to a Curses	window
       and advance the cursor

       #include <curses.h>

       int add_wch(
	       const cchar_t *wch ); int wadd_wch(
	       WINDOW *win,
	       const cchar_t *wch ); int mvadd_wch(
	       int y,
	       int x,
	       const cchar_t *wch ); int mvwadd_wch(
	       WINDOW *win,
	       int y,
	       int x,
	       const cchar_t *wch ); int echo_wchar(
	       const cchar_t *wch ); int wecho_wchar(
	       WINDOW *win,
	       const cchar_t *wch );

       Curses Library (libcurses)

       Interfaces  documented on this reference page conform to industry stan‐
       dards as follows:

       add_wch,	    wadd_wch,	  mvadd_wch,	  mvwadd_wch,	   echo_wchar,
       wecho_wchar:  XCURSES4.2

       Refer  to  the  standards(5)  reference page for more information about
       industry standards and associated tags.

       The add_wch, wadd_wch, mvadd_wch, and mvwadd_wch functions put the com‐
       plex  character	wch into the window at the current or specified cursor
       position, of the current or specified window, and advance the  position
       of  the	window	cursor.	 These functions perform wrapping and special-
       character processing as follows: If wch refers to a spacing  character,
       then  any previous character at that location is removed; a new charac‐
       ter specified by wch is added at that location with rendition specified
       by  wch;	 then  the cursor is advanced to the next spacing character on
       the screen.  If wch refers to a	non-spacing  character,	 all  previous
       characters  at  that location are preserved; the non-spacing characters
       of wch are added to the spacing complex character,  and	the  rendition
       specified  by  wch  is ignored.	If the character part of wch is a tab,
       newline, or backspace, the cursor is  moved  appropriately  within  the
       window.	A newline also does a clrtoeol before moving. Tabs are consid‐
       ered to be at every eighth column.  If the character  part  of  wch  is
       another	control	 character,  it	 is  drawn in the ^X notation. Calling
       win_wch after adding a control character does not  return  the  control
       character,  but instead returns the representation of the control char‐

       The echo_wchar function is functionally equivalent to a call to add_wch
       followed	 by a call to refresh. Similarly, the wecho_wchar is function‐
       ally equivalent to a call to wadd_wch followed by a call	 to  wrefresh.
       The  knowledge  that  only  a single character is being output is taken
       into consideration and, for non-control characters, a considerable per‐
       formance	 gain  might  be seen by using the *echo* functions instead of
       their equivalents.

   Line Graphics
       The following variables may be used to add line-drawing	characters  to
       the  screen  with  functions  of the add_wch family. When variables are
       defined for the terminal, the  WA_ALTCHARSET  bit  is  turned  on  [see
       curs_attr_get(3)].  Otherwise,  the  default  character listed below is
       stored in the variable. The names chosen are consistent with the	 VT100

       Name	       Default	 Glyph Description
       WACS_ULCORNER   +	 upper left-hand corner
       WACS_LLCORNER   +	 lower left-hand corner
       WACS_URCORNER   +	 upper right-hand corner
       WACS_LRCORNER   +	 lower right-hand corner
       WACS_RTEE       +	 right tee
       WACS_LTEE       +	 left tee
       WACS_BTEE       +	 bottom tee
       WACS_TTEE       +	 top tee
       WACS_HLINE      -	 horizontal line
       WACS_VLINE      |	 vertical line
       WACS_PLUS       +	 plus
       WACS_S1	       -	 scan line 1
       WACS_S9	       _	 scan line 9
       WACS_DIAMOND    +	 diamond
       WACS_CKBOARD    :	 checker board (stipple)
       WACS_DEGREE     '	 degree symbol
       WACS_PLMINUS    #	 plus/minus
       WACS_BULLET     o	 bullet
       WACS_LARROW     <	 arrow pointing left
       WACS_RARROW     >	 arrow pointing right
       WACS_DARROW     v	 arrow pointing down
       WACS_UARROW     ^	 arrow pointing up
       WACS_BOARD      #	 board of squares
       WACS_LANTERN    #	 lantern symbol
       WACS_BLOCK      #	 solid square block

       The  header  file  <curses.h>  automatically  includes  the header file

       The add_wch, mvadd_wch, mvwadd_wch, and echo_wchar may be macros.

       All functions return OK upon successful	completion.   Otherwise,  they
       return ERR.

       Functions: curses(3), curs_attr_get(3), curs_clear(3), curs_outopts(3),
       curs_refresh(3), putwc(3)

       Others: standards(5)


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