datasets.sgml

GLib是GTK+和GNOME工程的基础底层核心程序库

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<title><anchor id="g-dataset-id-remove-no-notify">g_dataset_id_remove_no_notify ()</title>
<programlisting><link linkend="gpointer">gpointer</link>    g_dataset_id_remove_no_notify   (<link linkend="gconstpointer">gconstpointer</link> dataset_location,
                                             <link linkend="GQuark">GQuark</link> key_id);</programlisting>
<para>
Removes an element, without calling its destroy notification function.
</para><informaltable pgwide="1" frame="none" role="params">
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<row><entry align="right"><parameter>dataset_location</parameter>&nbsp;:</entry>
<entry>the location identifying the dataset.
</entry></row>
<row><entry align="right"><parameter>key_id</parameter>&nbsp;:</entry>
<entry>the <link linkend="GQuark">GQuark</link> ID identifying the data element.
</entry></row>
<row><entry align="right"><emphasis>Returns</emphasis> :</entry><entry>the data previously stored at <parameter>key_id</parameter>, or <literal>NULL</literal> if none.


</entry></row>
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<refsect2>
<title><anchor id="g-dataset-set-data">g_dataset_set_data()</title>
<programlisting>#define     g_dataset_set_data(l, k, d)</programlisting>
<para>
Sets the data corresponding to the given string identifier.
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<row><entry align="right"><parameter>l</parameter>&nbsp;:</entry>
<entry>the location identifying the dataset.
</entry></row>
<row><entry align="right"><parameter>k</parameter>&nbsp;:</entry>
<entry>the string to identify the data element.
</entry></row>
<row><entry align="right"><parameter>d</parameter>&nbsp;:</entry>
<entry>the data element.


</entry></row>
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<title><anchor id="g-dataset-set-data-full">g_dataset_set_data_full()</title>
<programlisting>#define     g_dataset_set_data_full(l, k, d, f)</programlisting>
<para>
Sets the data corresponding to the given string identifier, and the function
to call when the data element is destroyed.
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<row><entry align="right"><parameter>l</parameter>&nbsp;:</entry>
<entry>the location identifying the dataset.
</entry></row>
<row><entry align="right"><parameter>k</parameter>&nbsp;:</entry>
<entry>the string to identify the data element.
</entry></row>
<row><entry align="right"><parameter>d</parameter>&nbsp;:</entry>
<entry>the data element.
</entry></row>
<row><entry align="right"><parameter>f</parameter>&nbsp;:</entry>
<entry>the function to call when the data element is removed. This
function will be called with the data element and can be used to free any
memory allocated for it.


</entry></row>
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<refsect2>
<title><anchor id="g-dataset-get-data">g_dataset_get_data()</title>
<programlisting>#define     g_dataset_get_data(l, k)</programlisting>
<para>
Gets the data element corresponding to a string.
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<row><entry align="right"><parameter>l</parameter>&nbsp;:</entry>
<entry>the location identifying the dataset.
</entry></row>
<row><entry align="right"><parameter>k</parameter>&nbsp;:</entry>
<entry>the string identifying the data element.
</entry></row>
<row><entry align="right"><emphasis>Returns</emphasis> :</entry><entry>the data element corresponding to the string, or <literal>NULL</literal> if it is not
found.


</entry></row>
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<refsect2>
<title><anchor id="g-dataset-remove-data">g_dataset_remove_data()</title>
<programlisting>#define     g_dataset_remove_data(l, k)</programlisting>
<para>
Removes a data element corresponding to a string.
Its destroy function is called if it has been set.
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<row><entry align="right"><parameter>l</parameter>&nbsp;:</entry>
<entry>the location identifying the dataset.
</entry></row>
<row><entry align="right"><parameter>k</parameter>&nbsp;:</entry>
<entry>the string identifying the data element.


</entry></row>
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<refsect2>
<title><anchor id="g-dataset-remove-no-notify">g_dataset_remove_no_notify()</title>
<programlisting>#define     g_dataset_remove_no_notify(l, k)</programlisting>
<para>
Removes an element, without calling its destroy notifier.
</para><informaltable pgwide="1" frame="none" role="params">
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<row><entry align="right"><parameter>l</parameter>&nbsp;:</entry>
<entry>the location identifying the dataset.
</entry></row>
<row><entry align="right"><parameter>k</parameter>&nbsp;:</entry>
<entry>the string identifying the data element.


</entry></row>
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<refsect2>
<title><anchor id="g-dataset-foreach">g_dataset_foreach ()</title>
<programlisting>void        g_dataset_foreach               (<link linkend="gconstpointer">gconstpointer</link> dataset_location,
                                             <link linkend="GDataForeachFunc">GDataForeachFunc</link> func,
                                             <link linkend="gpointer">gpointer</link> user_data);</programlisting>
<para>
Calls the given function for each data element which is associated with the
given location.
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<row><entry align="right"><parameter>dataset_location</parameter>&nbsp;:</entry>
<entry>the location identifying the dataset.
</entry></row>
<row><entry align="right"><parameter>func</parameter>&nbsp;:</entry>
<entry>the function to call for each data element.
</entry></row>
<row><entry align="right"><parameter>user_data</parameter>&nbsp;:</entry>
<entry>user data to pass to the function.


</entry></row>
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<title><anchor id="GDataForeachFunc">GDataForeachFunc ()</title>
<programlisting>void        (*GDataForeachFunc)             (<link linkend="GQuark">GQuark</link> key_id,
                                             <link linkend="gpointer">gpointer</link> data,
                                             <link linkend="gpointer">gpointer</link> user_data);</programlisting>
<para>
Specifies the type of function passed to <link linkend="g-dataset-foreach">g_dataset_foreach</link>().
It is called with each <link linkend="GQuark">GQuark</link> id and associated data element,
together with the <parameter>user_data</parameter> parameter supplied to <link linkend="g-dataset-foreach">g_dataset_foreach</link>().
</para><informaltable pgwide="1" frame="none" role="params">
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<row><entry align="right"><parameter>key_id</parameter>&nbsp;:</entry>
<entry>the <link linkend="GQuark">GQuark</link> id to identifying the data element.
</entry></row>
<row><entry align="right"><parameter>data</parameter>&nbsp;:</entry>
<entry>the data element.
</entry></row>
<row><entry align="right"><parameter>user_data</parameter>&nbsp;:</entry>
<entry>user data passed to <link linkend="g-dataset-foreach">g_dataset_foreach</link>().


</entry></row>
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<title><anchor id="g-dataset-destroy">g_dataset_destroy ()</title>
<programlisting>void        g_dataset_destroy               (<link linkend="gconstpointer">gconstpointer</link> dataset_location);</programlisting>
<para>
Destroys the dataset, freeing all memory allocated, and calling any
destroy functions set for data elements.
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<row><entry align="right"><parameter>dataset_location</parameter>&nbsp;:</entry>
<entry>the location identifying the dataset.


</entry></row>
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