X-Git-Url: https://ncurses.scripts.mit.edu/?a=blobdiff_plain;f=man%2Fcurs_add_wchstr.3x;h=4a0d06e9d93252edb507b11c4c8396b907ef3c74;hb=fc11bff62abb32a3e7724180a94c1068c148ea6c;hp=5dd3e8f4e1312ab3c5e3863cb0d6ac791046c564;hpb=e607aef87171fae9359b0c43a04d8d932719bc71;p=ncurses.git

diff --git a/man/curs_add_wchstr.3x b/man/curs_add_wchstr.3x
index 5dd3e8f4..4a0d06e9 100644
--- a/man/curs_add_wchstr.3x
+++ b/man/curs_add_wchstr.3x
@@ -27,8 +27,8 @@
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"
-.\" $Id: curs_add_wchstr.3x,v 1.39 2024/04/20 21:20:07 tom Exp $
-.TH curs_add_wchstr 3X 2024-04-20 "ncurses @NCURSES_MAJOR@.@NCURSES_MINOR@" "Library calls"
+.\" $Id: curs_add_wchstr.3x,v 1.40 2024/05/11 20:39:53 tom Exp $
+.TH curs_add_wchstr 3X 2024-05-11 "ncurses @NCURSES_MAJOR@.@NCURSES_MINOR@" "Library calls"
 .ie \n(.g \{\
 .ds `` \(lq
 .ds '' \(rq
@@ -69,45 +69,63 @@ add a \fIcurses\fR complex character string to a window
 \fBint mvwadd_wchnstr(WINDOW *\fIwin\fP, int \fIy\fP, int \fIx\fP, const cchar_t *\fIwchstr\fP, int \fIn\fP);
 .fi
 .SH DESCRIPTION
-These functions copy the (null-terminated)
-array of complex characters \fIwchstr\fP
-into the window image structure
-starting at the current cursor position.
+.B \%wadd_wchstr
+copies the string of complex characters
+.I \%wchstr
+to the window
+.IR win "."
+A null complex character terminates the string.
+If a complex character does completely fit at the end of the line,
+.I curses
+fills the remaining columns with the window background;
+see \fB\%bkgrnd\fP(3X).
+.B \%wadd_wchnstr
+does the same,
+but copies at most
+.I n
+characters,
+or as many as possible if
+.I n
+is
+.BR \-1 "."
+\fB\%ncurses\fP(3X) describes the variants of these functions.
 .PP
-The four functions with \fIn\fP as the last
-argument copy at most \fIn\fP elements,
-but no more than will fit on the line.
-If \fBn\fP=\fB\-1\fP then the whole array is copied,
-to the maximum number of characters that will fit on the line.
-.PP
-The window cursor is \fInot\fP advanced.
-These functions are faster than \fBwaddnstr\fP.
-On the other hand:
+Because these functions do not call \fB\%wadd_wch\fP(3X) internally,
+they are faster than \fB\%waddwstr\fP(3X) and \fB\%waddnwstr\fP(3X).
+On the other hand,
+they
 .bP
-they do not perform checking
-(such as for the newline, backspace, or carriage return characters),
+do not treat the backspace,
+carriage return,
+or line feed characters specially;
 .bP
-they do not advance the current cursor position,
+do not represent unprintable characters with \fB\%wunctrl\fP(3X);
 .bP
-they do not expand other control characters to ^-escapes, and
+do not update the cursor position to follow the last character written;
 .bP
-they truncate the string if it crosses the right margin,
-rather than wrapping it around to the new line.
-.PP
-These functions end successfully
-on encountering a null \fBcchar_t\fP, or
-when they have filled the current line.
-If a complex character cannot completely fit at the end of the current line,
-the remaining columns are filled with the background character and rendition.
+truncate the string at the window's right margin,
+rather than wrapping it to the next line and potentially scrolling.
 .SH RETURN VALUE
-All functions return the integer \fBERR\fP upon failure and \fBOK\fP on success.
+These functions return
+.B OK
+on success and
+.B ERR
+on failure.
 .PP
 X/Open Curses does not specify any error conditions.
-This implementation returns an error
+.I \%ncurses
+returns
+.B ERR
+if
 .bP
-if the \fIwin\fP parameter is null or
+.I win
+is
+.B NULL
+or
 .bP
-if the \fIwchstr\fP parameter is null.
+.I wchstr
+is
+.BR NULL "."
 .PP
 Functions prefixed with \*(``mv\*('' first perform cursor movement and
 fail if the position
@@ -115,9 +133,12 @@ fail if the position
 .IR x )
 is outside the window boundaries.
 .SH NOTES
-All functions except \fBwadd_wchnstr\fP may be macros.
+All of these functions except
+.B \%wadd_wchnstr
+may be implemented as macros.
 .SH PORTABILITY
-These functions are described in X/Open Curses, Issue 4.
+X/Open Curses,
+Issue 4 describes these functions.
 .SH SEE ALSO
 \fB\%curs_addchstr\fP(3X) describes comparable functions of the
 .I \%ncurses