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| <a name="glib-Hostname-Utilities"></a><div class="titlepage"></div> |
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| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="glib-Hostname-Utilities.top_of_page"></a>Hostname Utilities</span></h2> |
| <p>Hostname Utilities — Internet hostname utilities</p> |
| </td> |
| <td class="gallery_image" valign="top" align="right"></td> |
| </tr></table></div> |
| <div class="refsect1"> |
| <a name="glib-Hostname-Utilities.functions"></a><h2>Functions</h2> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="functions_return"> |
| <col class="functions_name"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="glib-Hostname-Utilities.html#g-hostname-to-ascii" title="g_hostname_to_ascii ()">g_hostname_to_ascii</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="glib-Hostname-Utilities.html#g-hostname-to-unicode" title="g_hostname_to_unicode ()">g_hostname_to_unicode</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="glib-Hostname-Utilities.html#g-hostname-is-non-ascii" title="g_hostname_is_non_ascii ()">g_hostname_is_non_ascii</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="glib-Hostname-Utilities.html#g-hostname-is-ascii-encoded" title="g_hostname_is_ascii_encoded ()">g_hostname_is_ascii_encoded</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="glib-Hostname-Utilities.html#g-hostname-is-ip-address" title="g_hostname_is_ip_address ()">g_hostname_is_ip_address</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="glib-Hostname-Utilities.includes"></a><h2>Includes</h2> |
| <pre class="synopsis">#include <glib.h> |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="glib-Hostname-Utilities.description"></a><h2>Description</h2> |
| <p>Functions for manipulating internet hostnames; in particular, for |
| converting between Unicode and ASCII-encoded forms of |
| Internationalized Domain Names (IDNs).</p> |
| <p>The |
| <a class="ulink" href="http://www.ietf.org/rfc/rfc3490.txt" target="_top">Internationalized Domain Names for Applications (IDNA)</a> |
| standards allow for the use |
| of Unicode domain names in applications, while providing |
| backward-compatibility with the old ASCII-only DNS, by defining an |
| ASCII-Compatible Encoding of any given Unicode name, which can be |
| used with non-IDN-aware applications and protocols. (For example, |
| "Παν語.org" maps to "xn--4wa8awb4637h.org".)</p> |
| </div> |
| <div class="refsect1"> |
| <a name="glib-Hostname-Utilities.functions_details"></a><h2>Functions</h2> |
| <div class="refsect2"> |
| <a name="g-hostname-to-ascii"></a><h3>g_hostname_to_ascii ()</h3> |
| <pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> * |
| g_hostname_to_ascii (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *hostname</code></em>);</pre> |
| <p>Converts <em class="parameter"><code>hostname</code></em> |
| to its canonical ASCII form; an ASCII-only |
| string containing no uppercase letters and not ending with a |
| trailing dot.</p> |
| <div class="refsect3"> |
| <a name="g-hostname-to-ascii.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>hostname</p></td> |
| <td class="parameter_description"><p>a valid UTF-8 or ASCII hostname</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="g-hostname-to-ascii.returns"></a><h4>Returns</h4> |
| <p> an ASCII hostname, which must be freed, or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> if |
| <em class="parameter"><code>hostname</code></em> |
| is in some way invalid.</p> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="g-hostname-to-unicode"></a><h3>g_hostname_to_unicode ()</h3> |
| <pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="returnvalue">gchar</span></a> * |
| g_hostname_to_unicode (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *hostname</code></em>);</pre> |
| <p>Converts <em class="parameter"><code>hostname</code></em> |
| to its canonical presentation form; a UTF-8 |
| string in Unicode normalization form C, containing no uppercase |
| letters, no forbidden characters, and no ASCII-encoded segments, |
| and not ending with a trailing dot.</p> |
| <p>Of course if <em class="parameter"><code>hostname</code></em> |
| is not an internationalized hostname, then |
| the canonical presentation form will be entirely ASCII.</p> |
| <div class="refsect3"> |
| <a name="g-hostname-to-unicode.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>hostname</p></td> |
| <td class="parameter_description"><p>a valid UTF-8 or ASCII hostname</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="g-hostname-to-unicode.returns"></a><h4>Returns</h4> |
| <p> a UTF-8 hostname, which must be freed, or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> if |
| <em class="parameter"><code>hostname</code></em> |
| is in some way invalid.</p> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="g-hostname-is-non-ascii"></a><h3>g_hostname_is_non_ascii ()</h3> |
| <pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a> |
| g_hostname_is_non_ascii (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *hostname</code></em>);</pre> |
| <p>Tests if <em class="parameter"><code>hostname</code></em> |
| contains Unicode characters. If this returns |
| <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a>, you need to encode the hostname with <a class="link" href="glib-Hostname-Utilities.html#g-hostname-to-ascii" title="g_hostname_to_ascii ()"><code class="function">g_hostname_to_ascii()</code></a> |
| before using it in non-IDN-aware contexts.</p> |
| <p>Note that a hostname might contain a mix of encoded and unencoded |
| segments, and so it is possible for <a class="link" href="glib-Hostname-Utilities.html#g-hostname-is-non-ascii" title="g_hostname_is_non_ascii ()"><code class="function">g_hostname_is_non_ascii()</code></a> and |
| <a class="link" href="glib-Hostname-Utilities.html#g-hostname-is-ascii-encoded" title="g_hostname_is_ascii_encoded ()"><code class="function">g_hostname_is_ascii_encoded()</code></a> to both return <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> for a name.</p> |
| <div class="refsect3"> |
| <a name="g-hostname-is-non-ascii.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>hostname</p></td> |
| <td class="parameter_description"><p>a hostname</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="g-hostname-is-non-ascii.returns"></a><h4>Returns</h4> |
| <p> <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if <em class="parameter"><code>hostname</code></em> |
| contains any non-ASCII characters</p> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="g-hostname-is-ascii-encoded"></a><h3>g_hostname_is_ascii_encoded ()</h3> |
| <pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a> |
| g_hostname_is_ascii_encoded (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *hostname</code></em>);</pre> |
| <p>Tests if <em class="parameter"><code>hostname</code></em> |
| contains segments with an ASCII-compatible |
| encoding of an Internationalized Domain Name. If this returns |
| <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a>, you should decode the hostname with <a class="link" href="glib-Hostname-Utilities.html#g-hostname-to-unicode" title="g_hostname_to_unicode ()"><code class="function">g_hostname_to_unicode()</code></a> |
| before displaying it to the user.</p> |
| <p>Note that a hostname might contain a mix of encoded and unencoded |
| segments, and so it is possible for <a class="link" href="glib-Hostname-Utilities.html#g-hostname-is-non-ascii" title="g_hostname_is_non_ascii ()"><code class="function">g_hostname_is_non_ascii()</code></a> and |
| <a class="link" href="glib-Hostname-Utilities.html#g-hostname-is-ascii-encoded" title="g_hostname_is_ascii_encoded ()"><code class="function">g_hostname_is_ascii_encoded()</code></a> to both return <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> for a name.</p> |
| <div class="refsect3"> |
| <a name="g-hostname-is-ascii-encoded.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>hostname</p></td> |
| <td class="parameter_description"><p>a hostname</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="g-hostname-is-ascii-encoded.returns"></a><h4>Returns</h4> |
| <p> <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if <em class="parameter"><code>hostname</code></em> |
| contains any ASCII-encoded |
| segments.</p> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="g-hostname-is-ip-address"></a><h3>g_hostname_is_ip_address ()</h3> |
| <pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a> |
| g_hostname_is_ip_address (<em class="parameter"><code>const <a class="link" href="glib-Basic-Types.html#gchar" title="gchar"><span class="type">gchar</span></a> *hostname</code></em>);</pre> |
| <p>Tests if <em class="parameter"><code>hostname</code></em> |
| is the string form of an IPv4 or IPv6 address. |
| (Eg, "192.168.0.1".)</p> |
| <div class="refsect3"> |
| <a name="g-hostname-is-ip-address.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>hostname</p></td> |
| <td class="parameter_description"><p>a hostname (or IP address in string form)</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="g-hostname-is-ip-address.returns"></a><h4>Returns</h4> |
| <p> <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if <em class="parameter"><code>hostname</code></em> |
| is an IP address</p> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="glib-Hostname-Utilities.other_details"></a><h2>Types and Values</h2> |
| </div> |
| </div> |
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