blob: 799cba9e272869490f2cfb92d7b6499e10686957 [file] [log] [blame] [edit]
<!--
****************************************************************************
* Copyright (c) 1998-2006,2010 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_scr_dump.3x,v 1.9 2010/12/04 18:40:45 tom Exp @
-->
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="generator" content="Manpage converted by man2html - see http://invisible-island.net/scripts/readme.html#others_scripts">
<TITLE>curs_scr_dump 3x</TITLE>
<link rev=made href="mailto:bug-ncurses@gnu.org">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</HEAD>
<BODY>
<H1 class="no-header">curs_scr_dump 3x</H1>
<PRE>
<STRONG><A HREF="curs_scr_dump.3x.html">curs_scr_dump(3x)</A></STRONG> <STRONG><A HREF="curs_scr_dump.3x.html">curs_scr_dump(3x)</A></STRONG>
</PRE>
<H2><a name="h2-NAME">NAME</a></H2><PRE>
<STRONG>scr_dump</STRONG>, <STRONG>scr_restore</STRONG>, <STRONG>scr_init</STRONG>, <STRONG>scr_set</STRONG> - read (write) a
<STRONG>curses</STRONG> screen from (to) a file
</PRE>
<H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
<STRONG>int</STRONG> <STRONG>scr_dump(const</STRONG> <STRONG>char</STRONG> <STRONG>*filename);</STRONG>
<STRONG>int</STRONG> <STRONG>scr_restore(const</STRONG> <STRONG>char</STRONG> <STRONG>*filename);</STRONG>
<STRONG>int</STRONG> <STRONG>scr_init(const</STRONG> <STRONG>char</STRONG> <STRONG>*filename);</STRONG>
<STRONG>int</STRONG> <STRONG>scr_set(const</STRONG> <STRONG>char</STRONG> <STRONG>*filename);</STRONG>
</PRE>
<H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
The <STRONG>scr_dump</STRONG> routine dumps the current contents of the
virtual screen to the file <EM>filename</EM>.
The <STRONG>scr_restore</STRONG> routine sets the virtual screen to the
contents of <EM>filename</EM>, which must have been written using
<STRONG>scr_dump</STRONG>. The next call to <STRONG>doupdate</STRONG> restores the screen
to the way it looked in the dump file.
The <STRONG>scr_init</STRONG> routine reads in the contents of <EM>filename</EM> and
uses them to initialize the <STRONG>curses</STRONG> data structures about
what the terminal currently has on its screen. If the da-
ta is determined to be valid, <STRONG>curses</STRONG> bases its next update
of the screen on this information rather than clearing the
screen and starting from scratch. <STRONG>scr_init</STRONG> is used after
<STRONG>initscr</STRONG> or a <STRONG>system</STRONG> call to share the screen with another
process which has done a <STRONG>scr_dump</STRONG> after its <STRONG>endwin</STRONG> call.
The data is declared invalid if the terminfo capabilities
<STRONG>rmcup</STRONG> and <STRONG>nrrmc</STRONG> exist; also if the terminal has been writ-
ten to since the preceding <STRONG>scr_dump</STRONG> call.
The <STRONG>scr_set</STRONG> routine is a combination of <STRONG>scr_restore</STRONG> and
<STRONG>scr_init</STRONG>. It tells the program that the information in
<EM>filename</EM> is what is currently on the screen, and also what
the program wants on the screen. This can be thought of
as a screen inheritance function.
To read (write) a window from (to) a file, use the <STRONG>getwin</STRONG>
and <STRONG>putwin</STRONG> routines [see <STRONG><A HREF="curs_util.3x.html">curs_util(3x)</A></STRONG>].
</PRE>
<H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
All routines return the integer <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG>
upon success.
X/Open defines no error conditions. In this implementa-
tion, each will return an error if the file cannot be
opened.
</PRE>
<H2><a name="h2-NOTES">NOTES</a></H2><PRE>
Note that <STRONG>scr_init</STRONG>, <STRONG>scr_set</STRONG>, and <STRONG>scr_restore</STRONG> may be
macros.
</PRE>
<H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
The XSI Curses standard, Issue 4, describes these func-
tions (adding the const qualifiers).
The SVr4 docs merely say under <STRONG>scr_init</STRONG> that the dump data
is also considered invalid "if the time-stamp of the tty
is old" but do not define "old".
</PRE>
<H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>,
<STRONG><A HREF="curs_util.3x.html">curs_util(3x)</A></STRONG>, <STRONG>system(3)</STRONG>
<STRONG><A HREF="curs_scr_dump.3x.html">curs_scr_dump(3x)</A></STRONG>
</PRE>
<div class="nav">
<ul>
<li><a href="#h2-NAME">NAME</a></li>
<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
<li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
<li><a href="#h2-NOTES">NOTES</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
</ul>
</div>
</BODY>
</HTML>