--- /dev/null
+.\"***************************************************************************
+.\" Copyright (c) 2001,2002 Free Software Foundation, Inc. *
+.\" *
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+.\" furnished to do so, subject to the following conditions: *
+.\" *
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+.\" *
+.\" Except as contained in this notice, the name(s) of the above copyright *
+.\" holders shall not be used in advertising or otherwise to promote the *
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+.\"***************************************************************************
+.\"
+.\" $Id: curs_add_wch.3x,v 1.4 2002/02/16 22:28:43 tom Exp $
+.TH curs_add_wch 3X ""
+.SH NAME
+\fBadd_wch\fP,
+\fBwadd_wch\fP,
+\fBmvadd_wch\fP,
+\fBmvwadd_wch\fP,
+\fBecho_wchar\fP,
+\fBwecho_wchar\fP - add a complex character and rendition to a \fBcurses\fR window, then advance the cursor
+.SH SYNOPSIS
+.PP
+\fB#include <curses.h>\fP
+.sp
+.B "int add_wch( const cchar_t *\fIwch\fB );"
+.br
+.B "int wadd_wch( WINDOW *\fIwin\fP, const cchar_t *\fIwch\fB );"
+.br
+.B "int mvadd_wch( int \fIy\fP, int \fIx\fP, const cchar_t *\fIwch\fB );"
+.br
+.B "int mvwadd_wch( WINDOW *\fIwin\fP, int \fIy\fP, int \fIx\fP, const cchar_t *\fIwch\fB );"
+.br
+.B "int echo_wchar( const cchar_t *\fIwch\fB );"
+.br
+.B "int wecho_wchar( WINDOW *\fIwin\fP, const cchar_t *\fIwch\fB );"
+.br
+.SH DESCRIPTION
+.PP
+The
+\fBadd_wch\fP,
+\fBwadd_wch\fP,
+\fBmvadd_wch\fP, and
+\fBmvwadd_wch\fP
+functions put the complex character \fIwch\fP into the given
+window at its current position,
+which is then advanced.
+These functions perform
+wrapping and special-character processing as follows:
+.TP 5
+-
+If \fIwch\fP refers to a spacing character,
+then any previous character at that location is removed.
+A new character specified by \fIwch\fP is
+placed at that location with rendition specified by \fIwch\fP.
+The cursor then advances to
+the next spacing character on the screen.
+.TP 5
+-
+If \fIwch\fP refers to a non-spacing character,
+all previous characters at that location are preserved.
+The non-spacing characters of \fIwch\fP
+are added to the spacing complex character,
+and the rendition specified by \fIwch\fP is ignored.
+.TP 5
+-
+If the character part of \fIwch\fP is
+a tab, newline, backspace or other control character,
+the window is updated and the cursor moves as if \fBaddch\fR(3X) were called.
+.PP
+The \fBecho_wchar\fP
+function is functionally equivalent to a call to
+\fBadd_wch\fP
+followed by a call to
+\fBrefresh\fP.
+Similarly, the
+\fBwecho_wchar\fP
+is functionally equivalent to a call to
+\fBwadd_wch\fP
+followed by a call to
+\fBwrefresh\fP.
+The knowledge
+that only a single character is being output is taken into consideration and,
+for non-control characters, a considerable performance gain might be seen
+by using the *\fBecho\fP* functions instead of their equivalents.
+.SH RETURN VALUES
+.PP
+All routines return the integer \fBERR\fR upon failure and \fBOK\fR on success.
+.SH NOTES
+.PP
+Note that
+\fBadd_wch\fP,
+\fBmvadd_wch\fP,
+\fBmvwadd_wch\fP, and
+\fBecho_wchar\fP
+may be macros.
+.SH PORTABILITY
+.PP
+All these functions are described in the XSI Curses standard, Issue 4.
+The defaults specified for forms-drawing characters apply in the POSIX locale.
+.PP
+XSI documents constants beginning with \fBWACS_\fP which are used for
+line-drawing.
+Those are not currently implemented in \fBncurses\fP.
+.SH SEE ALSO
+.PP
+\fBcurses\fR(3X),
+\fBcurs_attr_get\fR(3X),
+\fBcurs_clear\fR(3X),
+\fBcurs_outopts\fR(3X),
+\fBcurs_refresh\fR(3X),
+\fBputwc\fR(3)
+.\"#
+.\"# The following sets edit modes for GNU EMACS
+.\"# Local Variables:
+.\"# mode:nroff
+.\"# fill-column:79
+.\"# End:
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