curs_add_wch(3X)					      curs_add_wch(3X)



NAME
       add_wch, wadd_wch, mvadd_wch, mvwadd_wch, echo_wchar, wecho_wchar - add
       a complex character and rendition to a curses window, then advance  the
       cursor

SYNOPSIS
       #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 );

DESCRIPTION
       The add_wch, wadd_wch, mvadd_wch, and mvwadd_wch functions put the com-
       plex character wch into the given window at its current position, which
       is then advanced.  These functions perform wrapping and special-charac-
       ter processing as follows:

       -    If wch refers to a spacing character, then any previous  character

	    at	that location is removed.  A new character specified by wch is
	    placed at that location with rendition specified by wch.  The cur-
	    sor then advances 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, backspace or other

	    control  character,  the window is updated and the cursor moves as
	    if addch were called.

       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.

RETURN VALUES
       All routines return the integer ERR upon failure and OK on success.

NOTES
       Note that add_wch, mvadd_wch, mvwadd_wch, and echo_wchar may be macros.

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.

       XSI  documents  constants beginning with WACS_ which are used for line-
       drawing.  Those are not currently implemented in ncurses.

SEE ALSO
       curses(3X), curs_addch(3X),  curs_attr(3X),  curs_clear(3X),  curs_out-
       opts(3X), curs_refresh(3X), putwc(3)



							      curs_add_wch(3X)

NAME - SYNOPSIS - DESCRIPTION - RETURN VALUES - NOTES - PORTABILITY - 
SEE ALSO -