gseekable.html

最新gtk中文资料集

<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> the offset from the beginning of the buffer.
</td>
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<div class="refsect2" lang="en">
<a name="id3180244"></a><h3>
<a name="g-seekable-can-seek"></a>g_seekable_can_seek ()</h3>
<a class="indexterm" name="id3180256"></a><pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a>            g_seekable_can_seek                 (<a class="link" href="GSeekable.html" title="GSeekable">GSeekable</a> *seekable);</pre>
<p>
Tests if the stream supports the <a class="link" href="GSeekable.html#GSeekableIface"><span class="type">GSeekableIface</span></a>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
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<td><p><span class="term"><em class="parameter"><code>seekable</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="GSeekable.html" title="GSeekable"><span class="type">GSeekable</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> <a
href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"
><code class="literal">TRUE</code></a> if <em class="parameter"><code>seekable</code></em> can be seeked. <a
href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"
><code class="literal">FALSE</code></a> otherwise.
</td>
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<hr>
<div class="refsect2" lang="en">
<a name="id3180355"></a><h3>
<a name="g-seekable-seek"></a>g_seekable_seek ()</h3>
<a class="indexterm" name="id3180368"></a><pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a>            g_seekable_seek                     (<a class="link" href="GSeekable.html" title="GSeekable">GSeekable</a> *seekable,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#goffset"
>goffset</a> offset,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-IO-Channels.html#GSeekType"
>GSeekType</a> type,
                                                         <a class="link" href="GCancellable.html" title="GCancellable">GCancellable</a> *cancellable,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"
>GError</a> **error);</pre>
<p>
Seeks in the stream by the given <em class="parameter"><code>offset</code></em>, modified by <em class="parameter"><code>type</code></em>.
</p>
<p>
If <em class="parameter"><code>cancellable</code></em> is not <a
href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"
><code class="literal">NULL</code></a>, then the operation can be cancelled by
triggering the cancellable object from another thread. If the operation
was cancelled, the error <a class="link" href="gio-GIOError.html#G-IO-ERROR-CANCELLED:CAPS"><code class="literal">G_IO_ERROR_CANCELLED</code></a> will be returned.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
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<td><p><span class="term"><em class="parameter"><code>seekable</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="GSeekable.html" title="GSeekable"><span class="type">GSeekable</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>offset</code></em>&#160;:</span></p></td>
<td> a <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#goffset"
><span class="type">goffset</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>type</code></em>&#160;:</span></p></td>
<td> a <a
href="/usr/share/gtk-doc/html/glib/glib-IO-Channels.html#GSeekType"
><span class="type">GSeekType</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>cancellable</code></em>&#160;:</span></p></td>
<td> optional <a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> object, <a
href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"
><code class="literal">NULL</code></a> to ignore. 
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em>&#160;:</span></p></td>
<td> a <a
href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"
><span class="type">GError</span></a> location to store the error occuring, or <a
href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"
><code class="literal">NULL</code></a> to 
ignore.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> <a
href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"
><code class="literal">TRUE</code></a> if successful. If an error
    has occurred, this function will return <a
href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"
><code class="literal">FALSE</code></a> and set <em class="parameter"><code>error</code></em>
    appropriately if present.
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</tbody>
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<hr>
<div class="refsect2" lang="en">
<a name="id3180635"></a><h3>
<a name="g-seekable-can-truncate"></a>g_seekable_can_truncate ()</h3>
<a class="indexterm" name="id3183765"></a><pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a>            g_seekable_can_truncate             (<a class="link" href="GSeekable.html" title="GSeekable">GSeekable</a> *seekable);</pre>
<p>
Tests if the stream can be truncated.</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>seekable</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="GSeekable.html" title="GSeekable"><span class="type">GSeekable</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> <a
href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"
><code class="literal">TRUE</code></a> if the stream can be truncated, <a
href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"
><code class="literal">FALSE</code></a> otherwise.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3183851"></a><h3>
<a name="g-seekable-truncate"></a>g_seekable_truncate ()</h3>
<a class="indexterm" name="id3183863"></a><pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a>            g_seekable_truncate                 (<a class="link" href="GSeekable.html" title="GSeekable">GSeekable</a> *seekable,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#goffset"
>goffset</a> offset,
                                                         <a class="link" href="GCancellable.html" title="GCancellable">GCancellable</a> *cancellable,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"
>GError</a> **error);</pre>
<p>
Truncates a stream with a given <span class="type">offset</span>. 
</p>
<p>
If <em class="parameter"><code>cancellable</code></em> is not <a
href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"
><code class="literal">NULL</code></a>, then the operation can be cancelled by
triggering the cancellable object from another thread. If the operation
was cancelled, the error <a class="link" href="gio-GIOError.html#G-IO-ERROR-CANCELLED:CAPS"><code class="literal">G_IO_ERROR_CANCELLED</code></a> will be returned. If an
operation was partially finished when the operation was cancelled the
partial result will be returned, without an error.</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>seekable</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="GSeekable.html" title="GSeekable"><span class="type">GSeekable</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>offset</code></em>&#160;:</span></p></td>
<td> a <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#goffset"
><span class="type">goffset</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>cancellable</code></em>&#160;:</span></p></td>
<td> optional <a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> object, <a
href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"
><code class="literal">NULL</code></a> to ignore. 
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em>&#160;:</span></p></td>
<td> a <a
href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"
><span class="type">GError</span></a> location to store the error occuring, or <a
href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"
><code class="literal">NULL</code></a> to 
ignore.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> <a
href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"
><code class="literal">TRUE</code></a> if successful. If an error
    has occurred, this function will return <a
href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"
><code class="literal">FALSE</code></a> and set <em class="parameter"><code>error</code></em>
    appropriately if present. 
</td>
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</tbody>
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<div class="refsect1" lang="en">
<a name="id3184100"></a><h2>See Also</h2>
<a class="link" href="GInputStream.html" title="GInputStream"><span class="type">GInputStream</span></a>, <a class="link" href="GOutputStream.html" title="GOutputStream"><span class="type">GOutputStream</span></a>
</div>
<div class="refsect1" lang="en">
<a name="id3184122"></a><div class="refsect2" lang="en"><a name="id3184123"></a></div>
<hr>
<div class="refsect2" lang="en"><a name="id3184124"></a></div>
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