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	<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html401/loose.dtd">
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	<title>GNU gettext utilities: 10. Producing Binary MO Files</title>

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	<table cellpadding="1" cellspacing="1" border="0">
	<tr><td valign="middle" align="left">[<a href="gettext_9.html#SEC86" title="Beginning of this chapter or previous chapter"> << </a>]</td>
	<td valign="middle" align="left">[<a href="gettext_11.html#SEC196" title="Next chapter"> >> </a>]</td>
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	<td valign="middle" align="left">   </td>
	<td valign="middle" align="left">   </td>
	<td valign="middle" align="left">   </td>
	<td valign="middle" align="left">   </td>
	<td valign="middle" align="left">[<a href="gettext_toc.html#SEC_Top" title="Cover (top) of document">Top</a>]</td>
	<td valign="middle" align="left">[<a href="gettext_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
	<td valign="middle" align="left">[<a href="gettext_21.html#SEC387" title="Index">Index</a>]</td>
	<td valign="middle" align="left">[<a href="gettext_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
	</tr></table>

	<hr size="2">
	<a name="Binaries"></a>
	<a name="SEC172"></a>
	<h1 class="chapter"> <a href="gettext_toc.html#TOC166">10. Producing Binary MO Files</a> </h1>




	<a name="msgfmt-Invocation"></a>
	<a name="SEC173"></a>
	<h2 class="section"> <a href="gettext_toc.html#TOC167">10.1 Invoking the <code>msgfmt</code> Program</a> </h2>


	<table><tr><td> </td><td><pre class="example">msgfmt [<var>option</var>] <var>filename</var>.po …
	</pre></td></tr></table>

	<a name="IDX926"></a>
	<p>The <code>msgfmt</code> programs generates a binary message catalog from a textual
	translation description.
	</p>

	<a name="SEC174"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC168">10.1.1 Input file location</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp><var>filename</var>.po …</samp>’</dt>
	<dt> ‘<samp>-D <var>directory</var></samp>’</dt>
	<dt> ‘<samp>--directory=<var>directory</var></samp>’</dt>
	<dd><a name="IDX927"></a>
	<a name="IDX928"></a>
	<p>Add <var>directory</var> to the list of directories. Source files are
	searched relative to this list of directories. The resulting binary
	file will be written relative to the current directory, though.
	</p>
	</dd>
	</dl>

	<p>If an input file is ‘<samp>-</samp>’, standard input is read.
	</p>

	<a name="SEC175"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC169">10.1.2 Operation mode</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>-j</samp>’</dt>
	<dt> ‘<samp>--java</samp>’</dt>
	<dd><a name="IDX929"></a>
	<a name="IDX930"></a>
	<a name="IDX931"></a>
	<p>Java mode: generate a Java <code>ResourceBundle</code> class.
	</p>
	</dd>
	<dt> ‘<samp>--java2</samp>’</dt>
	<dd><a name="IDX932"></a>
	<p>Like –java, and assume Java2 (JDK 1.2 or higher).
	</p>
	</dd>
	<dt> ‘<samp>--csharp</samp>’</dt>
	<dd><a name="IDX933"></a>
	<a name="IDX934"></a>
	<p>C# mode: generate a .NET .dll file containing a subclass of
	<code>GettextResourceSet</code>.
	</p>
	</dd>
	<dt> ‘<samp>--csharp-resources</samp>’</dt>
	<dd><a name="IDX935"></a>
	<a name="IDX936"></a>
	<p>C# resources mode: generate a .NET ‘<tt>.resources</tt>’ file.
	</p>
	</dd>
	<dt> ‘<samp>--tcl</samp>’</dt>
	<dd><a name="IDX937"></a>
	<a name="IDX938"></a>
	<p>Tcl mode: generate a tcl/msgcat ‘<tt>.msg</tt>’ file.
	</p>
	</dd>
	<dt> ‘<samp>--qt</samp>’</dt>
	<dd><a name="IDX939"></a>
	<a name="IDX940"></a>
	<p>Qt mode: generate a Qt ‘<tt>.qm</tt>’ file.
	</p>
	</dd>
	<dt> ‘<samp>--desktop</samp>’</dt>
	<dd><a name="IDX941"></a>
	<a name="IDX942"></a>
	<p>Desktop Entry mode: generate a ‘<tt>.desktop</tt>’ file.
	</p>
	</dd>
	<dt> ‘<samp>--xml</samp>’</dt>
	<dd><a name="IDX943"></a>
	<a name="IDX944"></a>
	<p>XML mode: generate an XML file.
	</p>
	</dd>
	</dl>


	<a name="SEC176"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC170">10.1.3 Output file location</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>-o <var>file</var></samp>’</dt>
	<dt> ‘<samp>--output-file=<var>file</var></samp>’</dt>
	<dd><a name="IDX945"></a>
	<a name="IDX946"></a>
	<p>Write output to specified file.
	</p>
	</dd>
	<dt> ‘<samp>--strict</samp>’</dt>
	<dd><a name="IDX947"></a>
	<p>Direct the program to work strictly following the Uniforum/Sun
	implementation. Currently this only affects the naming of the output
	file. If this option is not given the name of the output file is the
	same as the domain name. If the strict Uniforum mode is enabled the
	suffix ‘<tt>.mo</tt>’ is added to the file name if it is not already
	present.
	</p>
	<p>We find this behaviour of Sun's implementation rather silly and so by
	default this mode is <em>not</em> selected.
	</p>
	</dd>
	</dl>

	<p>If the output <var>file</var> is ‘<samp>-</samp>’, output is written to standard output.
	</p>

	<a name="SEC177"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC171">10.1.4 Output file location in Java mode</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>-r <var>resource</var></samp>’</dt>
	<dt> ‘<samp>--resource=<var>resource</var></samp>’</dt>
	<dd><a name="IDX948"></a>
	<a name="IDX949"></a>
	<p>Specify the resource name.
	</p>
	</dd>
	<dt> ‘<samp>-l <var>locale</var></samp>’</dt>
	<dt> ‘<samp>--locale=<var>locale</var></samp>’</dt>
	<dd><a name="IDX950"></a>
	<a name="IDX951"></a>
	<p>Specify the locale name, either a language specification of the form <var>ll</var>
	or a combined language and country specification of the form <var>ll_CC</var>.
	</p>
	</dd>
	<dt> ‘<samp>-d <var>directory</var></samp>’</dt>
	<dd><a name="IDX952"></a>
	<p>Specify the base directory of classes directory hierarchy.
	</p>
	</dd>
	<dt> ‘<samp>--source</samp>’</dt>
	<dd><a name="IDX953"></a>
	<p>Produce a .java source file, instead of a compiled .class file.
	</p>
	</dd>
	</dl>

	<p>The class name is determined by appending the locale name to the resource name,
	separated with an underscore. The ‘<samp>-d</samp>’ option is mandatory. The class
	is written under the specified directory.
	</p>

	<a name="SEC178"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC172">10.1.5 Output file location in C# mode</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>-r <var>resource</var></samp>’</dt>
	<dt> ‘<samp>--resource=<var>resource</var></samp>’</dt>
	<dd><a name="IDX954"></a>
	<a name="IDX955"></a>
	<p>Specify the resource name.
	</p>
	</dd>
	<dt> ‘<samp>-l <var>locale</var></samp>’</dt>
	<dt> ‘<samp>--locale=<var>locale</var></samp>’</dt>
	<dd><a name="IDX956"></a>
	<a name="IDX957"></a>
	<p>Specify the locale name, either a language specification of the form <var>ll</var>
	or a combined language and country specification of the form <var>ll_CC</var>.
	</p>
	</dd>
	<dt> ‘<samp>-d <var>directory</var></samp>’</dt>
	<dd><a name="IDX958"></a>
	<p>Specify the base directory for locale dependent ‘<tt>.dll</tt>’ files.
	</p>
	</dd>
	</dl>

	<p>The ‘<samp>-l</samp>’ and ‘<samp>-d</samp>’ options are mandatory. The ‘<tt>.dll</tt>’ file is
	written in a subdirectory of the specified directory whose name depends on the
	locale.
	</p>

	<a name="SEC179"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC173">10.1.6 Output file location in Tcl mode</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>-l <var>locale</var></samp>’</dt>
	<dt> ‘<samp>--locale=<var>locale</var></samp>’</dt>
	<dd><a name="IDX959"></a>
	<a name="IDX960"></a>
	<p>Specify the locale name, either a language specification of the form <var>ll</var>
	or a combined language and country specification of the form <var>ll_CC</var>.
	</p>
	</dd>
	<dt> ‘<samp>-d <var>directory</var></samp>’</dt>
	<dd><a name="IDX961"></a>
	<p>Specify the base directory of ‘<tt>.msg</tt>’ message catalogs.
	</p>
	</dd>
	</dl>

	<p>The ‘<samp>-l</samp>’ and ‘<samp>-d</samp>’ options are mandatory. The ‘<tt>.msg</tt>’ file is
	written in the specified directory.
	</p>

	<a name="SEC180"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC174">10.1.7 Desktop Entry mode operations</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>--template=<var>template</var></samp>’</dt>
	<dd><a name="IDX962"></a>
	<p>Specify a .desktop file used as a template.
	</p>
	</dd>
	<dt> ‘<samp>-k[<var>keywordspec</var>]</samp>’</dt>
	<dt> ‘<samp>--keyword[=<var>keywordspec</var>]</samp>’</dt>
	<dd><a name="IDX963"></a>
	<a name="IDX964"></a>
	<p>Specify <var>keywordspec</var> as an additional keyword to be looked for.
	Without a <var>keywordspec</var>, the option means to not use default keywords.
	</p>
	</dd>
	<dt> ‘<samp>-l <var>locale</var></samp>’</dt>
	<dt> ‘<samp>--locale=<var>locale</var></samp>’</dt>
	<dd><a name="IDX965"></a>
	<a name="IDX966"></a>
	<p>Specify the locale name, either a language specification of the form <var>ll</var>
	or a combined language and country specification of the form <var>ll_CC</var>.
	</p>
	</dd>
	<dt> ‘<samp>-d <var>directory</var></samp>’</dt>
	<dd><a name="IDX967"></a>
	<p>Specify the directory where PO files are read. The directory must
	contain the ‘<samp>LINGUAS</samp>’ file.
	</p>
	</dd>
	</dl>

	<p>To generate a ‘<samp>.desktop</samp>’ file for a single locale, you can use it
	as follows.
	</p>
	<table><tr><td> </td><td><pre class="example">msgfmt --desktop --template=<var>template</var> --locale=<var>locale</var> \
	-o <var>file</var> <var>filename</var>.po …
	</pre></td></tr></table>

	<p>msgfmt provides a special "bulk" operation mode to process multiple
	‘<tt>.po</tt>’ files at a time.
	</p>
	<table><tr><td> </td><td><pre class="example">msgfmt --desktop --template=<var>template</var> -d <var>directory</var> -o <var>file</var>
	</pre></td></tr></table>

	<p>msgfmt first reads the ‘<samp>LINGUAS</samp>’ file under <var>directory</var>, and
	then processes all ‘<samp>.po</samp>’ files listed there. You can also limit
	the locales to a subset, through the ‘<samp>LINGUAS</samp>’ environment
	variable.
	</p>
	<p>For either operation modes, the ‘<samp>-o</samp>’ and ‘<samp>--template</samp>’
	options are mandatory.
	</p>

	<a name="SEC181"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC175">10.1.8 XML mode operations</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>--template=<var>template</var></samp>’</dt>
	<dd><a name="IDX968"></a>
	<p>Specify an XML file used as a template.
	</p>
	</dd>
	<dt> ‘<samp>-L <var>name</var></samp>’</dt>
	<dt> ‘<samp>--language=<var>name</var></samp>’</dt>
	<dd><a name="IDX969"></a>
	<a name="IDX970"></a>
	<a name="IDX971"></a>
	<p>Specifies the language of the input files.
	</p>
	</dd>
	<dt> ‘<samp>-l <var>locale</var></samp>’</dt>
	<dt> ‘<samp>--locale=<var>locale</var></samp>’</dt>
	<dd><a name="IDX972"></a>
	<a name="IDX973"></a>
	<p>Specify the locale name, either a language specification of the form <var>ll</var>
	or a combined language and country specification of the form <var>ll_CC</var>.
	</p>
	</dd>
	<dt> ‘<samp>-d <var>directory</var></samp>’</dt>
	<dd><a name="IDX974"></a>
	<p>Specify the base directory of ‘<tt>.po</tt>’ message catalogs.
	</p>
	</dd>
	</dl>

	<p>To generate an XML file for a single locale, you can use it as follows.
	</p>
	<table><tr><td> </td><td><pre class="example">msgfmt --xml --template=<var>template</var> --locale=<var>locale</var> \
	-o <var>file</var> <var>filename</var>.po …
	</pre></td></tr></table>

	<p>msgfmt provides a special "bulk" operation mode to process multiple
	‘<tt>.po</tt>’ files at a time.
	</p>
	<table><tr><td> </td><td><pre class="example">msgfmt --xml --template=<var>template</var> -d <var>directory</var> -o <var>file</var>
	</pre></td></tr></table>

	<p>msgfmt first reads the ‘<samp>LINGUAS</samp>’ file under <var>directory</var>, and
	then processes all ‘<samp>.po</samp>’ files listed there. You can also limit
	the locales to a subset, through the ‘<samp>LINGUAS</samp>’ environment
	variable.
	</p>
	<p>For either operation modes, the ‘<samp>-o</samp>’ and ‘<samp>--template</samp>’
	options are mandatory.
	</p>

	<a name="SEC182"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC176">10.1.9 Input file syntax</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>-P</samp>’</dt>
	<dt> ‘<samp>--properties-input</samp>’</dt>
	<dd><a name="IDX975"></a>
	<a name="IDX976"></a>
	<p>Assume the input files are Java ResourceBundles in Java <code>.properties</code>
	syntax, not in PO file syntax.
	</p>
	</dd>
	<dt> ‘<samp>--stringtable-input</samp>’</dt>
	<dd><a name="IDX977"></a>
	<p>Assume the input files are NeXTstep/GNUstep localized resource files in
	<code>.strings</code> syntax, not in PO file syntax.
	</p>
	</dd>
	</dl>


	<a name="SEC183"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC177">10.1.10 Input file interpretation</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>-c</samp>’</dt>
	<dt> ‘<samp>--check</samp>’</dt>
	<dd><a name="IDX978"></a>
	<a name="IDX979"></a>
	<p>Perform all the checks implied by <code>--check-format</code>, <code>--check-header</code>,
	<code>--check-domain</code>.
	</p>
	</dd>
	<dt> ‘<samp>--check-format</samp>’</dt>
	<dd><a name="IDX980"></a>
	<a name="IDX981"></a>
	<p>Check language dependent format strings.
	</p>
	<p>If the string represents a format string used in a
	<code>printf</code>-like function both strings should have the same number of
	‘<samp>%</samp>’ format specifiers, with matching types. If the flag
	<code>c-format</code> or <code>possible-c-format</code> appears in the special
	comment <#,> for this entry a check is performed. For example, the
	check will diagnose using ‘<samp>%.*s</samp>’ against ‘<samp>%s</samp>’, or ‘<samp>%d</samp>’
	against ‘<samp>%s</samp>’, or ‘<samp>%d</samp>’ against ‘<samp>%x</samp>’. It can even handle
	positional parameters.
	</p>
	<p>Normally the <code>xgettext</code> program automatically decides whether a
	string is a format string or not. This algorithm is not perfect,
	though. It might regard a string as a format string though it is not
	used in a <code>printf</code>-like function and so <code>msgfmt</code> might report
	errors where there are none.
	</p>
	<p>To solve this problem the programmer can dictate the decision to the
	<code>xgettext</code> program (see section <a href="gettext_15.html#SEC266">C Format Strings</a>). The translator should not
	consider removing the flag from the <#,> line. This "fix" would be
	reversed again as soon as <code>msgmerge</code> is called the next time.
	</p>
	</dd>
	<dt> ‘<samp>--check-header</samp>’</dt>
	<dd><a name="IDX982"></a>
	<p>Verify presence and contents of the header entry. See section <a href="gettext_6.html#SEC51">Filling in the Header Entry</a>,
	for a description of the various fields in the header entry.
	</p>
	</dd>
	<dt> ‘<samp>--check-domain</samp>’</dt>
	<dd><a name="IDX983"></a>
	<p>Check for conflicts between domain directives and the <code>--output-file</code>
	option
	</p>
	</dd>
	<dt> ‘<samp>-C</samp>’</dt>
	<dt> ‘<samp>--check-compatibility</samp>’</dt>
	<dd><a name="IDX984"></a>
	<a name="IDX985"></a>
	<a name="IDX986"></a>
	<p>Check that GNU msgfmt behaves like X/Open msgfmt. This will give an error
	when attempting to use the GNU extensions.
	</p>
	</dd>
	<dt> ‘<samp>--check-accelerators[=<var>char</var>]</samp>’</dt>
	<dd><a name="IDX987"></a>
	<a name="IDX988"></a>
	<a name="IDX989"></a>
	<a name="IDX990"></a>
	<p>Check presence of keyboard accelerators for menu items. This is based on
	the convention used in some GUIs that a keyboard accelerator in a menu
	item string is designated by an immediately preceding ‘<samp>&</samp>’ character.
	Sometimes a keyboard accelerator is also called "keyboard mnemonic".
	This check verifies that if the untranslated string has exactly one
	‘<samp>&</samp>’ character, the translated string has exactly one ‘<samp>&</samp>’ as well.
	If this option is given with a <var>char</var> argument, this <var>char</var> should
	be a non-alphanumeric character and is used as keyboard accelerator mark
	instead of ‘<samp>&</samp>’.
	</p>
	</dd>
	<dt> ‘<samp>-f</samp>’</dt>
	<dt> ‘<samp>--use-fuzzy</samp>’</dt>
	<dd><a name="IDX991"></a>
	<a name="IDX992"></a>
	<a name="IDX993"></a>
	<p>Use fuzzy entries in output. Note that using this option is usually wrong,
	because fuzzy messages are exactly those which have not been validated by
	a human translator.
	</p>
	</dd>
	</dl>


	<a name="SEC184"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC178">10.1.11 Output details</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>-a <var>number</var></samp>’</dt>
	<dt> ‘<samp>--alignment=<var>number</var></samp>’</dt>
	<dd><a name="IDX994"></a>
	<a name="IDX995"></a>
	<p>Align strings to <var>number</var> bytes (default: 1).
	</p>
	</dd>
	<dt> ‘<samp>--endianness=<var>byteorder</var></samp>’</dt>
	<dd><a name="IDX996"></a>
	<p>Write out 32-bit numbers in the given byte order. The possible values are
	<code>big</code> and <code>little</code>. The default is <code>little</code>.
	</p>
	<p>MO files of any endianness can be used on any platform. When a MO file has
	an endianness other than the platform's one, the 32-bit numbers from the MO
	file are swapped at runtime. The performance impact is negligible.
	</p>
	<p>This option can be useful to produce MO files that are optimized for one
	platform.
	</p>
	</dd>
	<dt> ‘<samp>--no-hash</samp>’</dt>
	<dd><a name="IDX997"></a>
	<p>Don't include a hash table in the binary file. Lookup will be more expensive
	at run time (binary search instead of hash table lookup).
	</p>
	</dd>
	</dl>


	<a name="SEC185"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC179">10.1.12 Informative output</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>-h</samp>’</dt>
	<dt> ‘<samp>--help</samp>’</dt>
	<dd><a name="IDX998"></a>
	<a name="IDX999"></a>
	<p>Display this help and exit.
	</p>
	</dd>
	<dt> ‘<samp>-V</samp>’</dt>
	<dt> ‘<samp>--version</samp>’</dt>
	<dd><a name="IDX1000"></a>
	<a name="IDX1001"></a>
	<p>Output version information and exit.
	</p>
	</dd>
	<dt> ‘<samp>--statistics</samp>’</dt>
	<dd><a name="IDX1002"></a>
	<p>Print statistics about translations. When the option <code>--verbose</code> is used
	in combination with <code>--statistics</code>, the input file name is printed in
	front of the statistics line.
	</p>
	</dd>
	<dt> ‘<samp>-v</samp>’</dt>
	<dt> ‘<samp>--verbose</samp>’</dt>
	<dd><a name="IDX1003"></a>
	<a name="IDX1004"></a>
	<p>Increase verbosity level.
	</p>
	</dd>
	</dl>


	<a name="msgunfmt-Invocation"></a>
	<a name="SEC186"></a>
	<h2 class="section"> <a href="gettext_toc.html#TOC180">10.2 Invoking the <code>msgunfmt</code> Program</a> </h2>


	<table><tr><td> </td><td><pre class="example">msgunfmt [<var>option</var>] [<var>file</var>]...
	</pre></td></tr></table>

	<a name="IDX1005"></a>
	<p>The <code>msgunfmt</code> program converts a binary message catalog to a
	Uniforum style .po file.
	</p>

	<a name="SEC187"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC181">10.2.1 Operation mode</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>-j</samp>’</dt>
	<dt> ‘<samp>--java</samp>’</dt>
	<dd><a name="IDX1006"></a>
	<a name="IDX1007"></a>
	<a name="IDX1008"></a>
	<p>Java mode: input is a Java <code>ResourceBundle</code> class.
	</p>
	</dd>
	<dt> ‘<samp>--csharp</samp>’</dt>
	<dd><a name="IDX1009"></a>
	<a name="IDX1010"></a>
	<p>C# mode: input is a .NET .dll file containing a subclass of
	<code>GettextResourceSet</code>.
	</p>
	</dd>
	<dt> ‘<samp>--csharp-resources</samp>’</dt>
	<dd><a name="IDX1011"></a>
	<a name="IDX1012"></a>
	<p>C# resources mode: input is a .NET ‘<tt>.resources</tt>’ file.
	</p>
	</dd>
	<dt> ‘<samp>--tcl</samp>’</dt>
	<dd><a name="IDX1013"></a>
	<a name="IDX1014"></a>
	<p>Tcl mode: input is a tcl/msgcat ‘<tt>.msg</tt>’ file.
	</p>
	</dd>
	</dl>


	<a name="SEC188"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC182">10.2.2 Input file location</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp><var>file</var> …</samp>’</dt>
	<dd><p>Input .mo files.
	</p>
	</dd>
	</dl>

	<p>If no input <var>file</var> is given or if it is ‘<samp>-</samp>’, standard input is read.
	</p>

	<a name="SEC189"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC183">10.2.3 Input file location in Java mode</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>-r <var>resource</var></samp>’</dt>
	<dt> ‘<samp>--resource=<var>resource</var></samp>’</dt>
	<dd><a name="IDX1015"></a>
	<a name="IDX1016"></a>
	<p>Specify the resource name.
	</p>
	</dd>
	<dt> ‘<samp>-l <var>locale</var></samp>’</dt>
	<dt> ‘<samp>--locale=<var>locale</var></samp>’</dt>
	<dd><a name="IDX1017"></a>
	<a name="IDX1018"></a>
	<p>Specify the locale name, either a language specification of the form <var>ll</var>
	or a combined language and country specification of the form <var>ll_CC</var>.
	</p>
	</dd>
	</dl>

	<p>The class name is determined by appending the locale name to the resource name,
	separated with an underscore. The class is located using the <code>CLASSPATH</code>.
	</p>

	<a name="SEC190"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC184">10.2.4 Input file location in C# mode</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>-r <var>resource</var></samp>’</dt>
	<dt> ‘<samp>--resource=<var>resource</var></samp>’</dt>
	<dd><a name="IDX1019"></a>
	<a name="IDX1020"></a>
	<p>Specify the resource name.
	</p>
	</dd>
	<dt> ‘<samp>-l <var>locale</var></samp>’</dt>
	<dt> ‘<samp>--locale=<var>locale</var></samp>’</dt>
	<dd><a name="IDX1021"></a>
	<a name="IDX1022"></a>
	<p>Specify the locale name, either a language specification of the form <var>ll</var>
	or a combined language and country specification of the form <var>ll_CC</var>.
	</p>
	</dd>
	<dt> ‘<samp>-d <var>directory</var></samp>’</dt>
	<dd><a name="IDX1023"></a>
	<p>Specify the base directory for locale dependent ‘<tt>.dll</tt>’ files.
	</p>
	</dd>
	</dl>

	<p>The ‘<samp>-l</samp>’ and ‘<samp>-d</samp>’ options are mandatory. The ‘<tt>.msg</tt>’ file is
	located in a subdirectory of the specified directory whose name depends on the
	locale.
	</p>

	<a name="SEC191"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC185">10.2.5 Input file location in Tcl mode</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>-l <var>locale</var></samp>’</dt>
	<dt> ‘<samp>--locale=<var>locale</var></samp>’</dt>
	<dd><a name="IDX1024"></a>
	<a name="IDX1025"></a>
	<p>Specify the locale name, either a language specification of the form <var>ll</var>
	or a combined language and country specification of the form <var>ll_CC</var>.
	</p>
	</dd>
	<dt> ‘<samp>-d <var>directory</var></samp>’</dt>
	<dd><a name="IDX1026"></a>
	<p>Specify the base directory of ‘<tt>.msg</tt>’ message catalogs.
	</p>
	</dd>
	</dl>

	<p>The ‘<samp>-l</samp>’ and ‘<samp>-d</samp>’ options are mandatory. The ‘<tt>.msg</tt>’ file is
	located in the specified directory.
	</p>

	<a name="SEC192"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC186">10.2.6 Output file location</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>-o <var>file</var></samp>’</dt>
	<dt> ‘<samp>--output-file=<var>file</var></samp>’</dt>
	<dd><a name="IDX1027"></a>
	<a name="IDX1028"></a>
	<p>Write output to specified file.
	</p>
	</dd>
	</dl>

	<p>The results are written to standard output if no output file is specified
	or if it is ‘<samp>-</samp>’.
	</p>

	<a name="SEC193"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC187">10.2.7 Output details</a> </h3>


	<dl compact="compact">
	<dt> ‘<samp>--color</samp>’</dt>
	<dt> ‘<samp>--color=<var>when</var></samp>’</dt>
	<dd><a name="IDX1029"></a>
	<p>Specify whether or when to use colors and other text attributes.
	See <a href="gettext_9.html#SEC157">The <code>--color</code> option</a> for details.
	</p>
	</dd>
	<dt> ‘<samp>--style=<var>style_file</var></samp>’</dt>
	<dd><a name="IDX1030"></a>
	<p>Specify the CSS style rule file to use for <code>--color</code>.
	See <a href="gettext_9.html#SEC159">The <code>--style</code> option</a> for details.
	</p>
	</dd>
	<dt> ‘<samp>--force-po</samp>’</dt>
	<dd><a name="IDX1031"></a>
	<p>Always write an output file even if it contains no message.
	</p>
	</dd>
	<dt> ‘<samp>-i</samp>’</dt>
	<dt> ‘<samp>--indent</samp>’</dt>
	<dd><a name="IDX1032"></a>
	<a name="IDX1033"></a>
	<p>Write the .po file using indented style.
	</p>
	</dd>
	<dt> ‘<samp>--strict</samp>’</dt>
	<dd><a name="IDX1034"></a>
	<p>Write out a strict Uniforum conforming PO file. Note that this
	Uniforum format should be avoided because it doesn't support the
	GNU extensions.
	</p>
	</dd>
	<dt> ‘<samp>-p</samp>’</dt>
	<dt> ‘<samp>--properties-output</samp>’</dt>
	<dd><a name="IDX1035"></a>
	<a name="IDX1036"></a>
	<p>Write out a Java ResourceBundle in Java <code>.properties</code> syntax. Note
	that this file format doesn't support plural forms and silently drops
	obsolete messages.
	</p>
	</dd>
	<dt> ‘<samp>--stringtable-output</samp>’</dt>
	<dd><a name="IDX1037"></a>
	<p>Write out a NeXTstep/GNUstep localized resource file in <code>.strings</code> syntax.
	Note that this file format doesn't support plural forms.
	</p>
	</dd>
	<dt> ‘<samp>-w <var>number</var></samp>’</dt>
	<dt> ‘<samp>--width=<var>number</var></samp>’</dt>
	<dd><a name="IDX1038"></a>
	<a name="IDX1039"></a>
	<p>Set the output page width. Long strings in the output files will be
	split across multiple lines in order to ensure that each line's width
	(= number of screen columns) is less or equal to the given <var>number</var>.
	</p>
	</dd>
	<dt> ‘<samp>--no-wrap</samp>’</dt>
	<dd><a name="IDX1040"></a>
	<p>Do not break long message lines. Message lines whose width exceeds the
	output page width will not be split into several lines. Only file reference
	lines which are wider than the output page width will be split.
	</p>
	</dd>
	<dt> ‘<samp>-s</samp>’</dt>
	<dt> ‘<samp>--sort-output</samp>’</dt>
	<dd><a name="IDX1041"></a>
	<a name="IDX1042"></a>
	<a name="IDX1043"></a>
	<p>Generate sorted output. Note that using this option makes it much harder
	for the translator to understand each message's context.
	</p>
	</dd>
	</dl>


	<a name="SEC194"></a>
	<h3 class="subsection"> <a href="gettext_toc.html#TOC188">10.2.8 Informative output</a> </h3>

	<dl compact="compact">
	<dt> ‘<samp>-h</samp>’</dt>
	<dt> ‘<samp>--help</samp>’</dt>
	<dd><a name="IDX1044"></a>
	<a name="IDX1045"></a>
	<p>Display this help and exit.
	</p>
	</dd>
	<dt> ‘<samp>-V</samp>’</dt>
	<dt> ‘<samp>--version</samp>’</dt>
	<dd><a name="IDX1046"></a>
	<a name="IDX1047"></a>
	<p>Output version information and exit.
	</p>
	</dd>
	<dt> ‘<samp>-v</samp>’</dt>
	<dt> ‘<samp>--verbose</samp>’</dt>
	<dd><a name="IDX1048"></a>
	<a name="IDX1049"></a>
	<p>Increase verbosity level.
	</p>
	</dd>
	</dl>


	<a name="MO-Files"></a>
	<a name="SEC195"></a>
	<h2 class="section"> <a href="gettext_toc.html#TOC189">10.3 The Format of GNU MO Files</a> </h2>

	<p>The format of the generated MO files is best described by a picture,
	which appears below.
	</p>
	<a name="IDX1050"></a>
	<p>The first two words serve the identification of the file. The magic
	number will always signal GNU MO files. The number is stored in the
	byte order used when the MO file was generated, so the magic number
	really is two numbers: <code>0x950412de</code> and <code>0xde120495</code>.
	</p>
	<p>The second word describes the current revision of the file format,
	composed of a major and a minor revision number. The revision numbers
	ensure that the readers of MO files can distinguish new formats from
	old ones and handle their contents, as far as possible. For now the
	major revision is 0 or 1, and the minor revision is also 0 or 1. More
	revisions might be added in the future. A program seeing an unexpected
	major revision number should stop reading the MO file entirely; whereas
	an unexpected minor revision number means that the file can be read but
	will not reveal its full contents, when parsed by a program that
	supports only smaller minor revision numbers.
	</p>
	<p>The version is kept
	separate from the magic number, instead of using different magic
	numbers for different formats, mainly because ‘<tt>/etc/magic</tt>’ is
	not updated often.
	</p>
	<p>Follow a number of pointers to later tables in the file, allowing
	for the extension of the prefix part of MO files without having to
	recompile programs reading them. This might become useful for later
	inserting a few flag bits, indication about the charset used, new
	tables, or other things.
	</p>
	<p>Then, at offset <var>O</var> and offset <var>T</var> in the picture, two tables
	of string descriptors can be found. In both tables, each string
	descriptor uses two 32 bits integers, one for the string length,
	another for the offset of the string in the MO file, counting in bytes
	from the start of the file. The first table contains descriptors
	for the original strings, and is sorted so the original strings
	are in increasing lexicographical order. The second table contains
	descriptors for the translated strings, and is parallel to the first
	table: to find the corresponding translation one has to access the
	array slot in the second array with the same index.
	</p>
	<p>Having the original strings sorted enables the use of simple binary
	search, for when the MO file does not contain an hashing table, or
	for when it is not practical to use the hashing table provided in
	the MO file. This also has another advantage, as the empty string
	in a PO file GNU <code>gettext</code> is usually <em>translated</em> into
	some system information attached to that particular MO file, and the
	empty string necessarily becomes the first in both the original and
	translated tables, making the system information very easy to find.
	</p>
	<a name="IDX1051"></a>
	<p>The size <var>S</var> of the hash table can be zero. In this case, the
	hash table itself is not contained in the MO file. Some people might
	prefer this because a precomputed hashing table takes disk space, and
	does not win <em>that</em> much speed. The hash table contains indices
	to the sorted array of strings in the MO file. Conflict resolution is
	done by double hashing. The precise hashing algorithm used is fairly
	dependent on GNU <code>gettext</code> code, and is not documented here.
	</p>
	<p>As for the strings themselves, they follow the hash file, and each
	is terminated with a <NUL>, and this <NUL> is not counted in
	the length which appears in the string descriptor. The <code>msgfmt</code>
	program has an option selecting the alignment for MO file strings.
	With this option, each string is separately aligned so it starts at
	an offset which is a multiple of the alignment value. On some RISC
	machines, a correct alignment will speed things up.
	</p>
	<a name="IDX1052"></a>
	<p>Contexts are stored by storing the concatenation of the context, a
	<EOT> byte, and the original string, instead of the original string.
	</p>
	<a name="IDX1053"></a>
	<p>Plural forms are stored by letting the plural of the original string
	follow the singular of the original string, separated through a
	<NUL> byte. The length which appears in the string descriptor
	includes both. However, only the singular of the original string
	takes part in the hash table lookup. The plural variants of the
	translation are all stored consecutively, separated through a
	<NUL> byte. Here also, the length in the string descriptor
	includes all of them.
	</p>
	<p>Nothing prevents a MO file from having embedded <NUL>s in strings.
	However, the program interface currently used already presumes
	that strings are <NUL> terminated, so embedded <NUL>s are
	somewhat useless. But the MO file format is general enough so other
	interfaces would be later possible, if for example, we ever want to
	implement wide characters right in MO files, where <NUL> bytes may
	accidentally appear. (No, we don't want to have wide characters in MO
	files. They would make the file unnecessarily large, and the
	‘<samp>wchar_t</samp>’ type being platform dependent, MO files would be
	platform dependent as well.)
	</p>
	<p>This particular issue has been strongly debated in the GNU
	<code>gettext</code> development forum, and it is expectable that MO file
	format will evolve or change over time. It is even possible that many
	formats may later be supported concurrently. But surely, we have to
	start somewhere, and the MO file format described here is a good start.
	Nothing is cast in concrete, and the format may later evolve fairly
	easily, so we should feel comfortable with the current approach.
	</p>
	<table><tr><td> </td><td><pre class="example"> byte
	+------------------------------------------+
	0 \| magic number = 0x950412de \|
	\| \|
	4 \| file format revision = 0 \|
	\| \|
	8 \| number of strings \| == N
	\| \|
	12 \| offset of table with original strings \| == O
	\| \|
	16 \| offset of table with translation strings \| == T
	\| \|
	20 \| size of hashing table \| == S
	\| \|
	24 \| offset of hashing table \| == H
	\| \|
	. .
	. (possibly more entries later) .
	. .
	\| \|
	O \| length & offset 0th string ----------------.
	O + 8 \| length & offset 1st string ------------------.
	... ... \| \|
	O + ((N-1)*8)\| length & offset (N-1)th string \| \| \|
	\| \| \| \|
	T \| length & offset 0th translation ---------------.
	T + 8 \| length & offset 1st translation -----------------.
	... ... \| \| \| \|
	T + ((N-1)*8)\| length & offset (N-1)th translation \| \| \| \| \|
	\| \| \| \| \| \|
	H \| start hash table \| \| \| \| \|
	... ... \| \| \| \|
	H + S * 4 \| end hash table \| \| \| \| \|
	\| \| \| \| \| \|
	\| NUL terminated 0th string <----------------' \| \| \|
	\| \| \| \| \|
	\| NUL terminated 1st string <------------------' \| \|
	\| \| \| \|
	... ... \| \|
	\| \| \| \|
	\| NUL terminated 0th translation <---------------' \|
	\| \| \|
	\| NUL terminated 1st translation <-----------------'
	\| \|
	... ...
	\| \|
	+------------------------------------------+
	</pre></td></tr></table>


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