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- * @Id: scr_dump.5,v 1.40 2023/12/16 21:07:24 tom Exp @
+ * @Id: scr_dump.5,v 1.41 2023/12/23 16:27:25 tom Exp @
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-<H1 class="no-header">scr_dump 5 2023-12-16 ncurses 6.4 File formats</H1>
+<H1 class="no-header">scr_dump 5 2023-12-23 ncurses 6.4 File formats</H1>
<PRE>
<STRONG><A HREF="scr_dump.5.html">scr_dump(5)</A></STRONG> File formats <STRONG><A HREF="scr_dump.5.html">scr_dump(5)</A></STRONG>
<STRONG>o</STRONG> The ncurses6 <STRONG>getwin</STRONG> reads the legacy screen dumps from ncurses5.
-</PRE><H3><a name="h3-ncurses5-_
legacy_">ncurses5 (legacy)</a></H3><PRE>
+</PRE><H3><a name="h3-ncurses5-_
Legacy_">ncurses5 (Legacy)</a></H3><PRE>
The screen-dump feature was added to <EM>ncurses</EM> in June 1995. While there
were fixes and improvements in succeeding years, the basic scheme was
unchanged:
- <STRONG>o</STRONG> The <STRONG>WINDOW</STRONG> structure was written in binary form.
+ <STRONG>o</STRONG> The <EM>WINDOW</EM> structure was written in binary form.
- <STRONG>o</STRONG> The <STRONG>WINDOW</STRONG> structure refers to lines of data, which were written as
- an array of binary data following the <STRONG>WINDOW</STRONG>.
+ <STRONG>o</STRONG> The <EM>WINDOW</EM> structure refers to lines of data, which were written as
+ an array of binary data following the <EM>WINDOW</EM>.
<STRONG>o</STRONG> When <STRONG>getwin</STRONG> restored the window, it would keep track of offsets
- into the array of line-data and adjust the <STRONG>WINDOW</STRONG> structure which
+ into the array of line-data and adjust the <EM>WINDOW</EM> structure which
was read back into memory.
This is similar to Unix System V, but does not write a "magic number"
</PRE><H3><a name="h3-Unix-System-V">Unix System V</a></H3><PRE>
Unix System V curses identified the file format by writing a "magic
- number" at the beginning of the dump. The <STRONG>WINDOW</STRONG> data and the lines of
+ number" at the beginning of the dump. The <EM>WINDOW</EM> data and the lines of
text follow, all in binary form.
The Solaris curses source has these definitions:
\001\035
- After the magic number, the <STRONG>WINDOW</STRONG> structure and line-data are written
+ After the magic number, the <EM>WINDOW</EM> structure and line-data are written
in binary format. While the magic number used by the Unix systems can
be seen using <STRONG>od(1)</STRONG>, none of the Unix systems documents the format used
for screen-dumps.
</PRE><H3><a name="h3-PDCurses">PDCurses</a></H3><PRE>
PDCurses added support for screen dumps in version 2.7 (2005). Like
- Unix System V and ncurses5, it writes the <STRONG>WINDOW</STRONG> structure in binary,
+ Unix System V and ncurses5, it writes the <EM>WINDOW</EM> structure in binary,
but begins the file with its three-byte identifier "PDC", followed by a
one-byte version, e.g.,
<STRONG>o</STRONG> the curses shared library major and minor versions as the first two
bytes (e.g., 7 and 1),
- <STRONG>o</STRONG> followed by a binary dump of the <STRONG>WINDOW</STRONG>,
+ <STRONG>o</STRONG> followed by a binary dump of the <EM>WINDOW</EM>,
- <STRONG>o</STRONG> some data for wide-characters referenced by the <STRONG>WINDOW</STRONG> structure,
+ <STRONG>o</STRONG> some data for wide-characters referenced by the <EM>WINDOW</EM> structure,
and
<STRONG>o</STRONG> finally, lines as done by other implementations.
-ncurses 6.4 2023-12-
16 <STRONG><A HREF="scr_dump.5.html">scr_dump(5)</A></STRONG>
+ncurses 6.4 2023-12-
23 <STRONG><A HREF="scr_dump.5.html">scr_dump(5)</A></STRONG>
</PRE>
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<ul>
<li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
<ul>
<li><a href="#h3-ncurses6">ncurses6</a></li>
-<li><a href="#h3-ncurses5-_legacy_">ncurses5 (legacy)</a></li>
+<li><a href="#h3-ncurses5-_Legacy_">ncurses5 (Legacy)</a></li>
</ul>
</li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a>
projects / ncurses.git / blobdiff