+.\"***************************************************************************
+.\" Copyright 2020-2021,2022 Thomas E. Dickey *
+.\" Copyright 1998-2007,2010 Free Software Foundation, Inc. *
+.\" *
+.\" Permission is hereby granted, free of charge, to any person obtaining a *
+.\" copy of this software and associated documentation files (the *
+.\" "Software"), to deal in the Software without restriction, including *
+.\" without limitation the rights to use, copy, modify, merge, publish, *
+.\" distribute, distribute with modifications, sublicense, and/or sell *
+.\" copies of the Software, and to permit persons to whom the Software is *
+.\" furnished to do so, subject to the following conditions: *
+.\" *
+.\" The above copyright notice and this permission notice shall be included *
+.\" in all copies or substantial portions of the Software. *
+.\" *
+.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
+.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
+.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
+.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
+.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
+.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
+.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
+.\" *
+.\" 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 *
+.\" sale, use or other dealings in this Software without prior written *
+.\" authorization. *
+.\"***************************************************************************
+.\"
+.\" $Id: curs_getyx.3x,v 1.23 2022/02/12 20:07:29 tom Exp $
.TH curs_getyx 3X ""
.SH NAME
-\fBgetyx\fR, \fBgetparyx\fR, \fBgetbegyx\fR,
-\fBgetmaxyx\fR - get \fBcurses\fR cursor and window coordinates
+\fBgetyx\fP,
+\fBgetparyx\fP,
+\fBgetbegyx\fP,
+\fBgetmaxyx\fP \- get \fBcurses\fP cursor and window coordinates
.SH SYNOPSIS
-\fB#include <curses.h>\fR
-
-\fBvoid getyx(WINDOW *win, int y, int x);\fR
+\fB#include <curses.h>\fP
+.sp
+\fBvoid getyx(WINDOW *\fIwin\fB, int \fIy\fB, int \fIx\fB);\fR
.br
-\fBvoid getparyx(WINDOW *win, int y, int x);\fR
+\fBvoid getparyx(WINDOW *\fIwin\fB, int \fIy\fB, int \fIx\fB);\fR
.br
-\fBvoid getbegyx(WINDOW *win, int y, int x);\fR
+\fBvoid getbegyx(WINDOW *\fIwin\fB, int \fIy\fB, int \fIx\fB);\fR
.br
-\fBvoid getmaxyx(WINDOW *win, int y, int x);\fR
+\fBvoid getmaxyx(WINDOW *\fIwin\fB, int \fIy\fB, int \fIx\fB);\fR
.br
.SH DESCRIPTION
-The \fBgetyx\fR macro places the current cursor position of the given window in
-the two integer variables \fIy\fR and \fIx\fR.
-
-If \fIwin\fR is a subwindow, the \fBgetparyx\fR macro places the beginning
+The \fBgetyx\fP macro places the current cursor position of the given window in
+the two integer variables \fIy\fP and \fIx\fP.
+.PP
+If \fIwin\fP is a subwindow, the \fBgetparyx\fP macro places the beginning
coordinates of the subwindow relative to the parent window into two integer
-variables \fIy\fR and \fIx\fR. Otherwise, \fB-1\fR is placed into \fIy\fR and
-\fIx\fR.
-
-Like \fBgetyx\fR, the \fBgetbegyx\fR and \fBgetmaxyx\fR macros store
+variables \fIy\fP and \fIx\fP.
+Otherwise, \fB\-1\fP is placed into \fIy\fP and \fIx\fP.
+.PP
+Like \fBgetyx\fP, the \fBgetbegyx\fP and \fBgetmaxyx\fP macros store
the current beginning coordinates and size of the specified window.
.SH RETURN VALUE
-The return values of these macros are undefined (\fIi\fR.\fIe\fR.,
-they should not be used as the right-hand side of assignment
-statements).
+The return values of these macros are undefined (i.e.,
+they should not be used as the right-hand side of assignment statements).
.SH NOTES
-All of these interfaces are macros and that "\fB&\fR" is not
-necessary before the variables \fIy\fR and \fIx\fR.
+All of these interfaces are macros.
+A "\fB&\fP" is not necessary before the variables \fIy\fP and \fIx\fP.
.SH PORTABILITY
-These functions are described in the XSI Curses standard, Issue 4.
+The
+\fBgetyx\fP,
+\fBgetparyx\fP,
+\fBgetbegyx\fP and
+\fBgetmaxyx\fP
+macros are described in the XSI Curses standard, Issue 4.
+.PP
+This implementation also provides functions
+\fBgetbegx\fP,
+\fBgetbegy\fP,
+\fBgetcurx\fP,
+\fBgetcury\fP,
+\fBgetmaxx\fP,
+\fBgetmaxy\fP,
+\fBgetparx\fP and
+\fBgetpary\fP
+for compatibility with older versions of curses.
+.PP
+Although X/Open Curses does not address this,
+many implementations provide members of the WINDOW structure
+containing values corresponding to these macros.
+For best portability, do not rely on using the data in WINDOW,
+since some implementations make WINDOW opaque (do not allow
+direct use of its members).
+.PP
+Besides the problem of opaque structures,
+the data stored in like-named members may not have like-values in
+different implementations.
+For example, the WINDOW._maxx and WINDOW._maxy values in ncurses
+have (at least since release 1.8.1) differed by one from some
+other implementations.
+The difference is hidden by means of the macro \fBgetmaxyx\fP.
.SH SEE ALSO
-\fBcurses\fR(3X)
-.\"#
-.\"# The following sets edit modes for GNU EMACS
-.\"# Local Variables:
-.\"# mode:nroff
-.\"# fill-column:79
-.\"# End:
+\fBcurses\fP(3X),
+\fBcurs_legacy\fP(3X),
+\fBcurs_opaque\fP(3X)
projects / ncurses.git / blobdiff