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|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<tr><td colspan="5" class="shortcuts"><nobr><a href="#xmlroff-libfo-version.synopsis" class="shortcut">Top</a>
|
<a href="#xmlroff-libfo-version.description" class="shortcut">Description</a></nobr></td></tr>
</table>
<div class="refentry" lang="en">
<a name="xmlroff-libfo-version"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="xmlroff-libfo-version.top_of_page"></a>libfo-version</span></h2>
<p>libfo-version — libfo version checking</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="xmlroff-libfo-version.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#define <a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION-MAJOR:CAPS" title="LIBFO_VERSION_MAJOR">LIBFO_VERSION_MAJOR</a>
#define <a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION-MINOR:CAPS" title="LIBFO_VERSION_MINOR">LIBFO_VERSION_MINOR</a>
#define <a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION-MICRO:CAPS" title="LIBFO_VERSION_MICRO">LIBFO_VERSION_MICRO</a>
#define <a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION-STRING:CAPS" title="LIBFO_VERSION_STRING">LIBFO_VERSION_STRING</a>
#define <a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION-EXTRA:CAPS" title="LIBFO_VERSION_EXTRA">LIBFO_VERSION_EXTRA</a>
#define <a class="link" href="xmlroff-libfo-version.html#LIBFO-PIXELS-PER-INCH:CAPS" title="LIBFO_PIXELS_PER_INCH">LIBFO_PIXELS_PER_INCH</a>
#define <a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION-ENCODE:CAPS" title="LIBFO_VERSION_ENCODE()">LIBFO_VERSION_ENCODE</a> (major, minor, micro)
#define <a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION:CAPS" title="LIBFO_VERSION">LIBFO_VERSION</a>
#define <a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION-CHECK:CAPS" title="LIBFO_VERSION_CHECK()">LIBFO_VERSION_CHECK</a> (major,minor,micro)
int <a class="link" href="xmlroff-libfo-version.html#libfo-version" title="libfo_version ()">libfo_version</a> (void);
const char* <a class="link" href="xmlroff-libfo-version.html#libfo-version-string" title="libfo_version_string ()">libfo_version_string</a> (void);
const char* <a class="link" href="xmlroff-libfo-version.html#libfo-version-check" title="libfo_version_check ()">libfo_version_check</a> (int required_major,
int required_minor,
int required_micro);
int <a class="link" href="xmlroff-libfo-version.html#libfo-pixels-per-inch" title="libfo_pixels_per_inch ()">libfo_pixels_per_inch</a> (void);
enum <a class="link" href="xmlroff-libfo-version.html#LibfoModuleEnum" title="enum LibfoModuleEnum">LibfoModuleEnum</a>;
<a class="link" href="xmlroff-libfo-version.html#LibfoVersionInfo" title="LibfoVersionInfo">LibfoVersionInfo</a>;
const <a class="link" href="xmlroff-libfo-version.html#LibfoVersionInfo" title="LibfoVersionInfo">LibfoVersionInfo</a>** <a class="link" href="xmlroff-libfo-version.html#libfo-version-get-info" title="libfo_version_get_info ()">libfo_version_get_info</a> (void);
</pre>
</div>
<div class="refsect1" lang="en">
<a name="xmlroff-libfo-version.description"></a><h2>Description</h2>
<p>
The capital-letter macros defined here can be used to check the
version of libfo at compile-time, and to
<span class="emphasis"><em>encode</em></span> libfo versions into integers. The
functions can be used to check the version of the linked libfo
library at run-time.</p>
<p>
</p>
</div>
<div class="refsect1" lang="en">
<a name="xmlroff-libfo-version.details"></a><h2>Details</h2>
<div class="refsect2" lang="en">
<a name="LIBFO-VERSION-MAJOR:CAPS"></a><h3>LIBFO_VERSION_MAJOR</h3>
<pre class="programlisting">#define LIBFO_VERSION_MAJOR 0
</pre>
<p>
The major component of the version of libfo available at
compile-time.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="LIBFO-VERSION-MINOR:CAPS"></a><h3>LIBFO_VERSION_MINOR</h3>
<pre class="programlisting">#define LIBFO_VERSION_MINOR 6
</pre>
<p>
The minor component of the version of libfo available at
compile-time.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="LIBFO-VERSION-MICRO:CAPS"></a><h3>LIBFO_VERSION_MICRO</h3>
<pre class="programlisting">#define LIBFO_VERSION_MICRO 2
</pre>
<p>
The micro component of the version of libfo available at
compile-time.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="LIBFO-VERSION-STRING:CAPS"></a><h3>LIBFO_VERSION_STRING</h3>
<pre class="programlisting">#define LIBFO_VERSION_STRING "0.6.2"
</pre>
<p>
A string literal containing the version of libfo available at
compile-time.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="LIBFO-VERSION-EXTRA:CAPS"></a><h3>LIBFO_VERSION_EXTRA</h3>
<pre class="programlisting">#define LIBFO_VERSION_EXTRA "-SVN541"
</pre>
<p>
Extra compile-time version information string literal containing,
e.g., the Subversion changeset number.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="LIBFO-PIXELS-PER-INCH:CAPS"></a><h3>LIBFO_PIXELS_PER_INCH</h3>
<pre class="programlisting">#define LIBFO_PIXELS_PER_INCH 96
</pre>
<p>
Pixels per inch for use with graphics without intrinsic size.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="LIBFO-VERSION-ENCODE:CAPS"></a><h3>LIBFO_VERSION_ENCODE()</h3>
<pre class="programlisting">#define LIBFO_VERSION_ENCODE(major, minor, micro)</pre>
<p>
This macro encodes the given libfo version into an integer. The
numbers returned by <a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION:CAPS" title="LIBFO_VERSION"><span class="type">LIBFO_VERSION</span></a> and <a class="link" href="xmlroff-libfo-version.html#libfo-version" title="libfo_version ()"><code class="function">libfo_version()</code></a> are encoded
using this macro. Two encoded version numbers can be compared as
integers.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>major</code></em> :</span></p></td>
<td> the major component of the version number
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>minor</code></em> :</span></p></td>
<td> the minor component of the version number
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>micro</code></em> :</span></p></td>
<td> the micro component of the version number
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="LIBFO-VERSION:CAPS"></a><h3>LIBFO_VERSION</h3>
<pre class="programlisting">#define LIBFO_VERSION</pre>
<p>
The version of libfo available at compile-time, encoded using
<a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION-ENCODE:CAPS" title="LIBFO_VERSION_ENCODE()"><code class="function">LIBFO_VERSION_ENCODE()</code></a>.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="LIBFO-VERSION-CHECK:CAPS"></a><h3>LIBFO_VERSION_CHECK()</h3>
<pre class="programlisting">#define LIBFO_VERSION_CHECK(major,minor,micro)</pre>
<p>
Checks that the version of libfo available at compile-time is
not older than the provided version number.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>major</code></em> :</span></p></td>
<td> the major component of the version number
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>minor</code></em> :</span></p></td>
<td> the minor component of the version number
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>micro</code></em> :</span></p></td>
<td> the micro component of the version number
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="libfo-version"></a><h3>libfo_version ()</h3>
<pre class="programlisting">int libfo_version (void);</pre>
<p>
This is similar to the macro <a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION:CAPS" title="LIBFO_VERSION"><code class="literal">LIBFO_VERSION</code></a> except that it returns
the encoded version of libfo available at run-time, as opposed
to the version available at compile-time.
</p>
<p>
A version number can be encoded into an integer using
<a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION-ENCODE:CAPS" title="LIBFO_VERSION_ENCODE()"><code class="function">LIBFO_VERSION_ENCODE()</code></a>.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>value: The encoded version of libfo library
available at run time.
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="libfo-version-string"></a><h3>libfo_version_string ()</h3>
<pre class="programlisting">const char* libfo_version_string (void);</pre>
<p>
This is similar to the macro <a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION-STRING:CAPS" title="LIBFO_VERSION_STRING"><code class="literal">LIBFO_VERSION_STRING</code></a> except that it
returns the version of libfo available at run-time, as opposed
to the version available at compile-time.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>value: A string containing the version of libfo library
available at run time.
The returned string is owned by libfo and should not be modified
or freed.
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="libfo-version-check"></a><h3>libfo_version_check ()</h3>
<pre class="programlisting">const char* libfo_version_check (int required_major,
int required_minor,
int required_micro);</pre>
<p>
Checks that the libfo library in use is compatible with the
given version. Generally you would pass in the constants
<a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION-MAJOR:CAPS" title="LIBFO_VERSION_MAJOR"><code class="literal">LIBFO_VERSION_MAJOR</code></a>, <a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION-MINOR:CAPS" title="LIBFO_VERSION_MINOR"><code class="literal">LIBFO_VERSION_MINOR</code></a>, <a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION-MICRO:CAPS" title="LIBFO_VERSION_MICRO"><code class="literal">LIBFO_VERSION_MICRO</code></a> as the
three arguments to this function; that produces a check that the
library in use at run-time is compatible with the version of
libfo the application or module was compiled against.
</p>
<p>
Compatibility is defined by two things: first the version
of the running library is newer than the version
<em class="parameter"><code>required_major.required_minor</code></em>.<em class="parameter"><code>required_micro</code></em>. Second
the running library must be binary compatible with the
version <em class="parameter"><code>required_major.required_minor</code></em>.<em class="parameter"><code>required_micro</code></em>
(same major version.)
</p>
<p>
For compile-time version checking use <a class="link" href="xmlroff-libfo-version.html#LIBFO-VERSION-CHECK:CAPS" title="LIBFO_VERSION_CHECK()"><code class="function">LIBFO_VERSION_CHECK()</code></a>.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>required_major</code></em> :</span></p></td>
<td> the required major version.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>required_minor</code></em> :</span></p></td>
<td> the required minor version.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>required_micro</code></em> :</span></p></td>
<td> the required major version.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> <a
href="../glib/glib-Standard-Macros.html#NULL:CAPS"
><code class="literal">NULL</code></a> if the libfo library is compatible with the
given version, or a string describing the version mismatch. The
returned string is owned by libfo and should not be modified
or freed.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="libfo-pixels-per-inch"></a><h3>libfo_pixels_per_inch ()</h3>
<pre class="programlisting">int libfo_pixels_per_inch (void);</pre>
<p>
This is similar to the macro <a class="link" href="xmlroff-libfo-version.html#LIBFO-PIXELS-PER-INCH:CAPS" title="LIBFO_PIXELS_PER_INCH"><code class="literal">LIBFO_PIXELS_PER_INCH</code></a> except that it
returns the encoded pixels per inch of libfo available at run-time,
as opposed to the pixels per inch available at compile-time.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>value: The encoded pixels per inch of libfo library
available at run time.
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="LibfoModuleEnum"></a><h3>enum LibfoModuleEnum</h3>
<pre class="programlisting">typedef enum {
LIBFO_MODULE_INVALID,
LIBFO_MODULE_XSL_FORMATTER,
LIBFO_MODULE_XSLT_PROCESSOR,
LIBFO_MODULE_XML_DOC,
LIBFO_MODULE_BACKEND,
LIBFO_MODULE_PANGO
} LibfoModuleEnum;
</pre>
<p>
The type of a module of libfo.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="LIBFO-MODULE-INVALID:CAPS"></a><span class="term"><code class="literal">LIBFO_MODULE_INVALID</code></span></p></td>
<td> Not a module
</td>
</tr>
<tr>
<td><p><a name="LIBFO-MODULE-XSL-FORMATTER:CAPS"></a><span class="term"><code class="literal">LIBFO_MODULE_XSL_FORMATTER</code></span></p></td>
<td> XSL formatter
</td>
</tr>
<tr>
<td><p><a name="LIBFO-MODULE-XSLT-PROCESSOR:CAPS"></a><span class="term"><code class="literal">LIBFO_MODULE_XSLT_PROCESSOR</code></span></p></td>
<td> XSLT processor
</td>
</tr>
<tr>
<td><p><a name="LIBFO-MODULE-XML-DOC:CAPS"></a><span class="term"><code class="literal">LIBFO_MODULE_XML_DOC</code></span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><a name="LIBFO-MODULE-BACKEND:CAPS"></a><span class="term"><code class="literal">LIBFO_MODULE_BACKEND</code></span></p></td>
<td> Backend
</td>
</tr>
<tr>
<td><p><a name="LIBFO-MODULE-PANGO:CAPS"></a><span class="term"><code class="literal">LIBFO_MODULE_PANGO</code></span></p></td>
<td> Pango
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="LibfoVersionInfo"></a><h3>LibfoVersionInfo</h3>
<pre class="programlisting">typedef struct {
LibfoModuleEnum module;
const gchar *nick;
const gchar *name;
gint compiled;
const gchar *compiled_string;
gint runtime;
const gchar *runtime_string;
} LibfoVersionInfo;
</pre>
<p>
Collected version information about a component of libfo.
</p>
<p>
Other than <em class="parameter"><code>nick</code></em>, one or more of the parts of the <a class="link" href="xmlroff-libfo-version.html#LibfoVersionInfo" title="LibfoVersionInfo"><span class="type">LibfoVersionInfo</span></a>
may be 0 or <a
href="../glib/glib-Standard-Macros.html#NULL:CAPS"
><code class="literal">NULL</code></a> if the component is unable to report that
information.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><a class="link" href="xmlroff-libfo-version.html#LibfoModuleEnum" title="enum LibfoModuleEnum">LibfoModuleEnum</a> <em class="structfield"><code>module</code></em>;</span></p></td>
<td> Type of the module
</td>
</tr>
<tr>
<td><p><span class="term">const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *<em class="structfield"><code>nick</code></em>;</span></p></td>
<td> Nickname
</td>
</tr>
<tr>
<td><p><span class="term">const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *<em class="structfield"><code>name</code></em>;</span></p></td>
<td> <a class="link" href="FoObject.html" title="FoObject"><span class="type">FoObject</span></a> type name, e.g., <a class="link" href="xmlroff-FoDocCairo.html#FoDocCairo" title="FoDocCairo"><span class="type">FoDocCairo</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><a
href="../glib/glib-Basic-Types.html#gint"
>gint</a> <em class="structfield"><code>compiled</code></em>;</span></p></td>
<td> Compiled version number
</td>
</tr>
<tr>
<td><p><span class="term">const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *<em class="structfield"><code>compiled_string</code></em>;</span></p></td>
<td> Compiled version number string
</td>
</tr>
<tr>
<td><p><span class="term"><a
href="../glib/glib-Basic-Types.html#gint"
>gint</a> <em class="structfield"><code>runtime</code></em>;</span></p></td>
<td> Runtime version number
</td>
</tr>
<tr>
<td><p><span class="term">const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *<em class="structfield"><code>runtime_string</code></em>;</span></p></td>
<td> Runtime version number string
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="libfo-version-get-info"></a><h3>libfo_version_get_info ()</h3>
<pre class="programlisting">const <a class="link" href="xmlroff-libfo-version.html#LibfoVersionInfo" title="LibfoVersionInfo">LibfoVersionInfo</a>** libfo_version_get_info (void);</pre>
<p>
Gets the <a class="link" href="xmlroff-libfo-version.html#LibfoVersionInfo" title="LibfoVersionInfo"><span class="type">LibfoVersionInfo</span></a> of libfo components.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> Array of pointers to <a class="link" href="xmlroff-libfo-version.html#LibfoVersionInfo" title="LibfoVersionInfo"><span class="type">LibfoVersionInfo</span></a>. The last item is <a
href="../glib/glib-Standard-Macros.html#NULL:CAPS"
><code class="literal">NULL</code></a>.
</td>
</tr></tbody>
</table></div>
</div>
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