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| <div class="refentry"> | |
| <a name="GMemoryOutputStream"></a><div class="titlepage"></div> | |
| <div class="refnamediv"><table width="100%"><tr> | |
| <td valign="top"> | |
| <h2><span class="refentrytitle"><a name="GMemoryOutputStream.top_of_page"></a>GMemoryOutputStream</span></h2> | |
| <p>GMemoryOutputStream — Streaming output operations on memory chunks</p> | |
| </td> | |
| <td class="gallery_image" valign="top" align="right"></td> | |
| </tr></table></div> | |
| <div class="refsect1"> | |
| <a name="GMemoryOutputStream.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 href="../glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a> | |
| </td> | |
| <td class="function_name"> | |
| <span class="c_punctuation">(</span><a class="link" href="GMemoryOutputStream.html#GReallocFunc" title="GReallocFunc ()">*GReallocFunc</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td class="function_type"> | |
| <a class="link" href="GOutputStream.html" title="GOutputStream"><span class="returnvalue">GOutputStream</span></a> * | |
| </td> | |
| <td class="function_name"> | |
| <a class="link" href="GMemoryOutputStream.html#g-memory-output-stream-new" title="g_memory_output_stream_new ()">g_memory_output_stream_new</a> <span class="c_punctuation">()</span> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td class="function_type"> | |
| <a class="link" href="GOutputStream.html" title="GOutputStream"><span class="returnvalue">GOutputStream</span></a> * | |
| </td> | |
| <td class="function_name"> | |
| <a class="link" href="GMemoryOutputStream.html#g-memory-output-stream-new-resizable" title="g_memory_output_stream_new_resizable ()">g_memory_output_stream_new_resizable</a> <span class="c_punctuation">()</span> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td class="function_type"> | |
| <a href="../glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a> | |
| </td> | |
| <td class="function_name"> | |
| <a class="link" href="GMemoryOutputStream.html#g-memory-output-stream-get-data" title="g_memory_output_stream_get_data ()">g_memory_output_stream_get_data</a> <span class="c_punctuation">()</span> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td class="function_type"> | |
| <a href="../glib-Basic-Types.html#gsize"><span class="returnvalue">gsize</span></a> | |
| </td> | |
| <td class="function_name"> | |
| <a class="link" href="GMemoryOutputStream.html#g-memory-output-stream-get-size" title="g_memory_output_stream_get_size ()">g_memory_output_stream_get_size</a> <span class="c_punctuation">()</span> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td class="function_type"> | |
| <a href="../glib-Basic-Types.html#gsize"><span class="returnvalue">gsize</span></a> | |
| </td> | |
| <td class="function_name"> | |
| <a class="link" href="GMemoryOutputStream.html#g-memory-output-stream-get-data-size" title="g_memory_output_stream_get_data_size ()">g_memory_output_stream_get_data_size</a> <span class="c_punctuation">()</span> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td class="function_type"> | |
| <a href="../glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a> | |
| </td> | |
| <td class="function_name"> | |
| <a class="link" href="GMemoryOutputStream.html#g-memory-output-stream-steal-data" title="g_memory_output_stream_steal_data ()">g_memory_output_stream_steal_data</a> <span class="c_punctuation">()</span> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td class="function_type"> | |
| <a href="../glib-Byte-Arrays.html#GBytes"><span class="returnvalue">GBytes</span></a> * | |
| </td> | |
| <td class="function_name"> | |
| <a class="link" href="GMemoryOutputStream.html#g-memory-output-stream-steal-as-bytes" title="g_memory_output_stream_steal_as_bytes ()">g_memory_output_stream_steal_as_bytes</a> <span class="c_punctuation">()</span> | |
| </td> | |
| </tr> | |
| </tbody> | |
| </table></div> | |
| </div> | |
| <div class="refsect1"> | |
| <a name="GMemoryOutputStream.properties"></a><h2>Properties</h2> | |
| <div class="informaltable"><table class="informaltable" border="0"> | |
| <colgroup> | |
| <col width="150px" class="properties_type"> | |
| <col width="300px" class="properties_name"> | |
| <col width="200px" class="properties_flags"> | |
| </colgroup> | |
| <tbody> | |
| <tr> | |
| <td class="property_type"><a href="../glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a></td> | |
| <td class="property_name"><a class="link" href="GMemoryOutputStream.html#GMemoryOutputStream--data" title="The “data” property">data</a></td> | |
| <td class="property_flags">Read / Write / Construct Only</td> | |
| </tr> | |
| <tr> | |
| <td class="property_type"><a href="../glib-Basic-Types.html#gulong"><span class="type">gulong</span></a></td> | |
| <td class="property_name"><a class="link" href="GMemoryOutputStream.html#GMemoryOutputStream--data-size" title="The “data-size” property">data-size</a></td> | |
| <td class="property_flags">Read</td> | |
| </tr> | |
| <tr> | |
| <td class="property_type"><a href="../glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a></td> | |
| <td class="property_name"><a class="link" href="GMemoryOutputStream.html#GMemoryOutputStream--destroy-function" title="The “destroy-function” property">destroy-function</a></td> | |
| <td class="property_flags">Read / Write / Construct Only</td> | |
| </tr> | |
| <tr> | |
| <td class="property_type"><a href="../glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a></td> | |
| <td class="property_name"><a class="link" href="GMemoryOutputStream.html#GMemoryOutputStream--realloc-function" title="The “realloc-function” property">realloc-function</a></td> | |
| <td class="property_flags">Read / Write / Construct Only</td> | |
| </tr> | |
| <tr> | |
| <td class="property_type"><a href="../glib-Basic-Types.html#gulong"><span class="type">gulong</span></a></td> | |
| <td class="property_name"><a class="link" href="GMemoryOutputStream.html#GMemoryOutputStream--size" title="The “size” property">size</a></td> | |
| <td class="property_flags">Read / Write / Construct Only</td> | |
| </tr> | |
| </tbody> | |
| </table></div> | |
| </div> | |
| <div class="refsect1"> | |
| <a name="GMemoryOutputStream.other"></a><h2>Types and Values</h2> | |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> | |
| <colgroup> | |
| <col width="150px" class="name"> | |
| <col class="description"> | |
| </colgroup> | |
| <tbody><tr> | |
| <td class="datatype_keyword"> </td> | |
| <td class="function_name"><a class="link" href="GMemoryOutputStream.html#GMemoryOutputStream-struct" title="GMemoryOutputStream">GMemoryOutputStream</a></td> | |
| </tr></tbody> | |
| </table></div> | |
| </div> | |
| <div class="refsect1"> | |
| <a name="GMemoryOutputStream.object-hierarchy"></a><h2>Object Hierarchy</h2> | |
| <pre class="screen"> <a href="../gobject-The-Base-Object-Type.html#GObject-struct">GObject</a> | |
| <span class="lineart">╰──</span> <a class="link" href="GOutputStream.html" title="GOutputStream">GOutputStream</a> | |
| <span class="lineart">╰──</span> GMemoryOutputStream | |
| </pre> | |
| </div> | |
| <div class="refsect1"> | |
| <a name="GMemoryOutputStream.implemented-interfaces"></a><h2>Implemented Interfaces</h2> | |
| <p> | |
| GMemoryOutputStream implements | |
| <a class="link" href="GSeekable.html" title="GSeekable">GSeekable</a> and <a class="link" href="GPollableOutputStream.html" title="GPollableOutputStream">GPollableOutputStream</a>.</p> | |
| </div> | |
| <div class="refsect1"> | |
| <a name="GMemoryOutputStream.includes"></a><h2>Includes</h2> | |
| <pre class="synopsis">#include <gio/gio.h> | |
| </pre> | |
| </div> | |
| <div class="refsect1"> | |
| <a name="GMemoryOutputStream.description"></a><h2>Description</h2> | |
| <p><a class="link" href="GMemoryOutputStream.html" title="GMemoryOutputStream"><span class="type">GMemoryOutputStream</span></a> is a class for using arbitrary | |
| memory chunks as output for GIO streaming output operations.</p> | |
| <p>As of GLib 2.34, <a class="link" href="GMemoryOutputStream.html" title="GMemoryOutputStream"><span class="type">GMemoryOutputStream</span></a> trivially implements | |
| <a class="link" href="GPollableOutputStream.html" title="GPollableOutputStream"><span class="type">GPollableOutputStream</span></a>: it always polls as ready.</p> | |
| </div> | |
| <div class="refsect1"> | |
| <a name="GMemoryOutputStream.functions_details"></a><h2>Functions</h2> | |
| <div class="refsect2"> | |
| <a name="GReallocFunc"></a><h3>GReallocFunc ()</h3> | |
| <pre class="programlisting"><a href="../glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a> | |
| <span class="c_punctuation">(</span>*GReallocFunc<span class="c_punctuation">)</span> (<em class="parameter"><code><a href="../glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>, | |
| <em class="parameter"><code><a href="../glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> size</code></em>);</pre> | |
| <p>Changes the size of the memory block pointed to by <em class="parameter"><code>data</code></em> | |
| to | |
| <em class="parameter"><code>size</code></em> | |
| bytes.</p> | |
| <p>The function should have the same semantics as <code class="function">realloc()</code>.</p> | |
| <div class="refsect3"> | |
| <a name="GReallocFunc.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>data</p></td> | |
| <td class="parameter_description"><p>memory block to reallocate</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>size</p></td> | |
| <td class="parameter_description"><p>size to reallocate <em class="parameter"><code>data</code></em> | |
| to</p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| </tbody> | |
| </table></div> | |
| </div> | |
| <div class="refsect3"> | |
| <a name="GReallocFunc.returns"></a><h4>Returns</h4> | |
| <p> a pointer to the reallocated memory</p> | |
| </div> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="g-memory-output-stream-new"></a><h3>g_memory_output_stream_new ()</h3> | |
| <pre class="programlisting"><a class="link" href="GOutputStream.html" title="GOutputStream"><span class="returnvalue">GOutputStream</span></a> * | |
| g_memory_output_stream_new (<em class="parameter"><code><a href="../glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>, | |
| <em class="parameter"><code><a href="../glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> size</code></em>, | |
| <em class="parameter"><code><a class="link" href="GMemoryOutputStream.html#GReallocFunc" title="GReallocFunc ()"><span class="type">GReallocFunc</span></a> realloc_function</code></em>, | |
| <em class="parameter"><code><a href="../glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> destroy_function</code></em>);</pre> | |
| <p>Creates a new <a class="link" href="GMemoryOutputStream.html" title="GMemoryOutputStream"><span class="type">GMemoryOutputStream</span></a>.</p> | |
| <p>In most cases this is not the function you want. See | |
| <a class="link" href="GMemoryOutputStream.html#g-memory-output-stream-new-resizable" title="g_memory_output_stream_new_resizable ()"><code class="function">g_memory_output_stream_new_resizable()</code></a> instead.</p> | |
| <p>If <em class="parameter"><code>data</code></em> | |
| is non-<a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, the stream will use that for its internal storage.</p> | |
| <p>If <em class="parameter"><code>realloc_fn</code></em> | |
| is non-<a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, it will be used for resizing the internal | |
| storage when necessary and the stream will be considered resizable. | |
| In that case, the stream will start out being (conceptually) empty. | |
| <em class="parameter"><code>size</code></em> | |
| is used only as a hint for how big <em class="parameter"><code>data</code></em> | |
| is. Specifically, | |
| seeking to the end of a newly-created stream will seek to zero, not | |
| <em class="parameter"><code>size</code></em> | |
| . Seeking past the end of the stream and then writing will | |
| introduce a zero-filled gap.</p> | |
| <p>If <em class="parameter"><code>realloc_fn</code></em> | |
| is <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> then the stream is fixed-sized. Seeking to | |
| the end will seek to <em class="parameter"><code>size</code></em> | |
| exactly. Writing past the end will give | |
| an 'out of space' error. Attempting to seek past the end will fail. | |
| Unlike the resizable case, seeking to an offset within the stream and | |
| writing will preserve the bytes passed in as <em class="parameter"><code>data</code></em> | |
| before that point | |
| and will return them as part of <a class="link" href="GMemoryOutputStream.html#g-memory-output-stream-steal-data" title="g_memory_output_stream_steal_data ()"><code class="function">g_memory_output_stream_steal_data()</code></a>. | |
| If you intend to seek you should probably therefore ensure that <em class="parameter"><code>data</code></em> | |
| is properly initialised.</p> | |
| <p>It is probably only meaningful to provide <em class="parameter"><code>data</code></em> | |
| and <em class="parameter"><code>size</code></em> | |
| in the case | |
| that you want a fixed-sized stream. Put another way: if <em class="parameter"><code>realloc_fn</code></em> | |
| is non-<a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> then it makes most sense to give <em class="parameter"><code>data</code></em> | |
| as <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> and | |
| <em class="parameter"><code>size</code></em> | |
| as 0 (allowing <a class="link" href="GMemoryOutputStream.html" title="GMemoryOutputStream"><span class="type">GMemoryOutputStream</span></a> to do the initial | |
| allocation for itself).</p> | |
| <div class="informalexample"> | |
| <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> | |
| <tbody> | |
| <tr> | |
| <td class="listing_lines" align="right"><pre>1 | |
| 2 | |
| 3 | |
| 4 | |
| 5 | |
| 6 | |
| 7 | |
| 8 | |
| 9</pre></td> | |
| <td class="listing_code"><pre class="programlisting"><span class="comment">// a stream that can grow</span> | |
| <span class="normal">stream </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="GMemoryOutputStream.html#g-memory-output-stream-new">g_memory_output_stream_new</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal"><a href="../glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">,</span><span class="normal"> </span><span class="number">0</span><span class="symbol">,</span><span class="normal"> realloc</span><span class="symbol">,</span><span class="normal"> free</span><span class="symbol">);</span> | |
| <span class="comment">// another stream that can grow</span> | |
| <span class="normal">stream2 </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="GMemoryOutputStream.html#g-memory-output-stream-new">g_memory_output_stream_new</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal"><a href="../glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">,</span><span class="normal"> </span><span class="number">0</span><span class="symbol">,</span><span class="normal"> <a href="../glib-Memory-Allocation.html#g-realloc">g_realloc</a></span><span class="symbol">,</span><span class="normal"> <a href="../glib-Memory-Allocation.html#g-free">g_free</a></span><span class="symbol">);</span> | |
| <span class="comment">// a fixed-size stream</span> | |
| <span class="normal">data </span><span class="symbol">=</span><span class="normal"> </span><span class="function">malloc</span><span class="normal"> </span><span class="symbol">(</span><span class="number">200</span><span class="symbol">);</span> | |
| <span class="normal">stream3 </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="GMemoryOutputStream.html#g-memory-output-stream-new">g_memory_output_stream_new</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">data</span><span class="symbol">,</span><span class="normal"> </span><span class="number">200</span><span class="symbol">,</span><span class="normal"> <a href="../glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">,</span><span class="normal"> free</span><span class="symbol">);</span></pre></td> | |
| </tr> | |
| </tbody> | |
| </table> | |
| </div> | |
| <p></p> | |
| <p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p> | |
| <div class="refsect3"> | |
| <a name="g-memory-output-stream-new.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>data</p></td> | |
| <td class="parameter_description"><p> pointer to a chunk of memory to use, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td> | |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>size</p></td> | |
| <td class="parameter_description"><p>the size of <em class="parameter"><code>data</code></em> | |
| </p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>realloc_function</p></td> | |
| <td class="parameter_description"><p> a function with <code class="function">realloc()</code> semantics (like <a href="../glib-Memory-Allocation.html#g-realloc"><code class="function">g_realloc()</code></a>) | |
| to be called when <em class="parameter"><code>data</code></em> | |
| needs to be grown, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td> | |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td> | |
| </tr> | |
| <tr> | |
| <td class="parameter_name"><p>destroy_function</p></td> | |
| <td class="parameter_description"><p> a function to be called on <em class="parameter"><code>data</code></em> | |
| when the stream is | |
| finalized, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td> | |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td> | |
| </tr> | |
| </tbody> | |
| </table></div> | |
| </div> | |
| <div class="refsect3"> | |
| <a name="g-memory-output-stream-new.returns"></a><h4>Returns</h4> | |
| <p> A newly created <a class="link" href="GMemoryOutputStream.html" title="GMemoryOutputStream"><span class="type">GMemoryOutputStream</span></a> object.</p> | |
| </div> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="g-memory-output-stream-new-resizable"></a><h3>g_memory_output_stream_new_resizable ()</h3> | |
| <pre class="programlisting"><a class="link" href="GOutputStream.html" title="GOutputStream"><span class="returnvalue">GOutputStream</span></a> * | |
| g_memory_output_stream_new_resizable (<em class="parameter"><code><span class="type">void</span></code></em>);</pre> | |
| <p>Creates a new <a class="link" href="GMemoryOutputStream.html" title="GMemoryOutputStream"><span class="type">GMemoryOutputStream</span></a>, using <a href="../glib-Memory-Allocation.html#g-realloc"><code class="function">g_realloc()</code></a> and <a href="../glib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> | |
| for memory allocation.</p> | |
| <p class="since">Since: <a class="link" href="api-index-2-36.html#api-index-2.36">2.36</a></p> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="g-memory-output-stream-get-data"></a><h3>g_memory_output_stream_get_data ()</h3> | |
| <pre class="programlisting"><a href="../glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a> | |
| g_memory_output_stream_get_data (<em class="parameter"><code><a class="link" href="GMemoryOutputStream.html" title="GMemoryOutputStream"><span class="type">GMemoryOutputStream</span></a> *ostream</code></em>);</pre> | |
| <p>Gets any loaded data from the <em class="parameter"><code>ostream</code></em> | |
| .</p> | |
| <p>Note that the returned pointer may become invalid on the next | |
| write or truncate operation on the stream.</p> | |
| <div class="refsect3"> | |
| <a name="g-memory-output-stream-get-data.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>ostream</p></td> | |
| <td class="parameter_description"><p>a <a class="link" href="GMemoryOutputStream.html" title="GMemoryOutputStream"><span class="type">GMemoryOutputStream</span></a></p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr></tbody> | |
| </table></div> | |
| </div> | |
| <div class="refsect3"> | |
| <a name="g-memory-output-stream-get-data.returns"></a><h4>Returns</h4> | |
| <p> pointer to the stream's data, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if the data | |
| has been stolen. </p> | |
| <p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p> | |
| </div> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="g-memory-output-stream-get-size"></a><h3>g_memory_output_stream_get_size ()</h3> | |
| <pre class="programlisting"><a href="../glib-Basic-Types.html#gsize"><span class="returnvalue">gsize</span></a> | |
| g_memory_output_stream_get_size (<em class="parameter"><code><a class="link" href="GMemoryOutputStream.html" title="GMemoryOutputStream"><span class="type">GMemoryOutputStream</span></a> *ostream</code></em>);</pre> | |
| <p>Gets the size of the currently allocated data area (available from | |
| <a class="link" href="GMemoryOutputStream.html#g-memory-output-stream-get-data" title="g_memory_output_stream_get_data ()"><code class="function">g_memory_output_stream_get_data()</code></a>).</p> | |
| <p>You probably don't want to use this function on resizable streams. | |
| See <a class="link" href="GMemoryOutputStream.html#g-memory-output-stream-get-data-size" title="g_memory_output_stream_get_data_size ()"><code class="function">g_memory_output_stream_get_data_size()</code></a> instead. For resizable | |
| streams the size returned by this function is an implementation | |
| detail and may be change at any time in response to operations on the | |
| stream.</p> | |
| <p>If the stream is fixed-sized (ie: no realloc was passed to | |
| <a class="link" href="GMemoryOutputStream.html#g-memory-output-stream-new" title="g_memory_output_stream_new ()"><code class="function">g_memory_output_stream_new()</code></a>) then this is the maximum size of the | |
| stream and further writes will return <a class="link" href="gio-GIOError.html#G-IO-ERROR-NO-SPACE:CAPS"><code class="literal">G_IO_ERROR_NO_SPACE</code></a>.</p> | |
| <p>In any case, if you want the number of bytes currently written to the | |
| stream, use <a class="link" href="GMemoryOutputStream.html#g-memory-output-stream-get-data-size" title="g_memory_output_stream_get_data_size ()"><code class="function">g_memory_output_stream_get_data_size()</code></a>.</p> | |
| <div class="refsect3"> | |
| <a name="g-memory-output-stream-get-size.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>ostream</p></td> | |
| <td class="parameter_description"><p>a <a class="link" href="GMemoryOutputStream.html" title="GMemoryOutputStream"><span class="type">GMemoryOutputStream</span></a></p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr></tbody> | |
| </table></div> | |
| </div> | |
| <div class="refsect3"> | |
| <a name="g-memory-output-stream-get-size.returns"></a><h4>Returns</h4> | |
| <p> the number of bytes allocated for the data buffer</p> | |
| </div> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="g-memory-output-stream-get-data-size"></a><h3>g_memory_output_stream_get_data_size ()</h3> | |
| <pre class="programlisting"><a href="../glib-Basic-Types.html#gsize"><span class="returnvalue">gsize</span></a> | |
| g_memory_output_stream_get_data_size (<em class="parameter"><code><a class="link" href="GMemoryOutputStream.html" title="GMemoryOutputStream"><span class="type">GMemoryOutputStream</span></a> *ostream</code></em>);</pre> | |
| <p>Returns the number of bytes from the start up to including the last | |
| byte written in the stream that has not been truncated away.</p> | |
| <div class="refsect3"> | |
| <a name="g-memory-output-stream-get-data-size.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>ostream</p></td> | |
| <td class="parameter_description"><p>a <a class="link" href="GMemoryOutputStream.html" title="GMemoryOutputStream"><span class="type">GMemoryOutputStream</span></a></p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr></tbody> | |
| </table></div> | |
| </div> | |
| <div class="refsect3"> | |
| <a name="g-memory-output-stream-get-data-size.returns"></a><h4>Returns</h4> | |
| <p> the number of bytes written to the stream</p> | |
| </div> | |
| <p class="since">Since: <a class="link" href="api-index-2-18.html#api-index-2.18">2.18</a></p> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="g-memory-output-stream-steal-data"></a><h3>g_memory_output_stream_steal_data ()</h3> | |
| <pre class="programlisting"><a href="../glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a> | |
| g_memory_output_stream_steal_data (<em class="parameter"><code><a class="link" href="GMemoryOutputStream.html" title="GMemoryOutputStream"><span class="type">GMemoryOutputStream</span></a> *ostream</code></em>);</pre> | |
| <p>Gets any loaded data from the <em class="parameter"><code>ostream</code></em> | |
| . Ownership of the data | |
| is transferred to the caller; when no longer needed it must be | |
| freed using the free function set in <em class="parameter"><code>ostream</code></em> | |
| 's | |
| <a class="link" href="GMemoryOutputStream.html#GMemoryOutputStream--destroy-function" title="The “destroy-function” property"><span class="type">“destroy-function”</span></a> property.</p> | |
| <p><em class="parameter"><code>ostream</code></em> | |
| must be closed before calling this function.</p> | |
| <div class="refsect3"> | |
| <a name="g-memory-output-stream-steal-data.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>ostream</p></td> | |
| <td class="parameter_description"><p>a <a class="link" href="GMemoryOutputStream.html" title="GMemoryOutputStream"><span class="type">GMemoryOutputStream</span></a></p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr></tbody> | |
| </table></div> | |
| </div> | |
| <div class="refsect3"> | |
| <a name="g-memory-output-stream-steal-data.returns"></a><h4>Returns</h4> | |
| <p> the stream's data, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if it has previously | |
| been stolen. </p> | |
| <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p> | |
| </div> | |
| <p class="since">Since: <a class="link" href="api-index-2-26.html#api-index-2.26">2.26</a></p> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="g-memory-output-stream-steal-as-bytes"></a><h3>g_memory_output_stream_steal_as_bytes ()</h3> | |
| <pre class="programlisting"><a href="../glib-Byte-Arrays.html#GBytes"><span class="returnvalue">GBytes</span></a> * | |
| g_memory_output_stream_steal_as_bytes (<em class="parameter"><code><a class="link" href="GMemoryOutputStream.html" title="GMemoryOutputStream"><span class="type">GMemoryOutputStream</span></a> *ostream</code></em>);</pre> | |
| <p>Returns data from the <em class="parameter"><code>ostream</code></em> | |
| as a <a href="../glib-Byte-Arrays.html#GBytes"><span class="type">GBytes</span></a>. <em class="parameter"><code>ostream</code></em> | |
| must be | |
| closed before calling this function.</p> | |
| <div class="refsect3"> | |
| <a name="g-memory-output-stream-steal-as-bytes.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>ostream</p></td> | |
| <td class="parameter_description"><p>a <a class="link" href="GMemoryOutputStream.html" title="GMemoryOutputStream"><span class="type">GMemoryOutputStream</span></a></p></td> | |
| <td class="parameter_annotations"> </td> | |
| </tr></tbody> | |
| </table></div> | |
| </div> | |
| <div class="refsect3"> | |
| <a name="g-memory-output-stream-steal-as-bytes.returns"></a><h4>Returns</h4> | |
| <p> the stream's data. </p> | |
| <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p> | |
| </div> | |
| <p class="since">Since: <a class="link" href="api-index-2-34.html#api-index-2.34">2.34</a></p> | |
| </div> | |
| </div> | |
| <div class="refsect1"> | |
| <a name="GMemoryOutputStream.other_details"></a><h2>Types and Values</h2> | |
| <div class="refsect2"> | |
| <a name="GMemoryOutputStream-struct"></a><h3>GMemoryOutputStream</h3> | |
| <pre class="programlisting">typedef struct _GMemoryOutputStream GMemoryOutputStream;</pre> | |
| <p>Implements <a class="link" href="GOutputStream.html" title="GOutputStream"><span class="type">GOutputStream</span></a> for arbitrary memory chunks.</p> | |
| </div> | |
| </div> | |
| <div class="refsect1"> | |
| <a name="GMemoryOutputStream.property-details"></a><h2>Property Details</h2> | |
| <div class="refsect2"> | |
| <a name="GMemoryOutputStream--data"></a><h3>The <code class="literal">“data”</code> property</h3> | |
| <pre class="programlisting"> “data” <a href="../glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a></pre> | |
| <p>Pointer to buffer where data will be written.</p> | |
| <p>Flags: Read / Write / Construct Only</p> | |
| <p class="since">Since: <a class="link" href="api-index-2-24.html#api-index-2.24">2.24</a></p> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="GMemoryOutputStream--data-size"></a><h3>The <code class="literal">“data-size”</code> property</h3> | |
| <pre class="programlisting"> “data-size” <a href="../glib-Basic-Types.html#gulong"><span class="type">gulong</span></a></pre> | |
| <p>Size of data written to the buffer.</p> | |
| <p>Flags: Read</p> | |
| <p class="since">Since: <a class="link" href="api-index-2-24.html#api-index-2.24">2.24</a></p> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="GMemoryOutputStream--destroy-function"></a><h3>The <code class="literal">“destroy-function”</code> property</h3> | |
| <pre class="programlisting"> “destroy-function” <a href="../glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a></pre> | |
| <p>Function called with the buffer as argument when the stream is destroyed.</p> | |
| <p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p> | |
| <p>Flags: Read / Write / Construct Only</p> | |
| <p class="since">Since: <a class="link" href="api-index-2-24.html#api-index-2.24">2.24</a></p> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="GMemoryOutputStream--realloc-function"></a><h3>The <code class="literal">“realloc-function”</code> property</h3> | |
| <pre class="programlisting"> “realloc-function” <a href="../glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a></pre> | |
| <p>Function with realloc semantics called to enlarge the buffer.</p> | |
| <p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p> | |
| <p>Flags: Read / Write / Construct Only</p> | |
| <p class="since">Since: <a class="link" href="api-index-2-24.html#api-index-2.24">2.24</a></p> | |
| </div> | |
| <hr> | |
| <div class="refsect2"> | |
| <a name="GMemoryOutputStream--size"></a><h3>The <code class="literal">“size”</code> property</h3> | |
| <pre class="programlisting"> “size” <a href="../glib-Basic-Types.html#gulong"><span class="type">gulong</span></a></pre> | |
| <p>Current size of the data buffer.</p> | |
| <p>Flags: Read / Write / Construct Only</p> | |
| <p class="since">Since: <a class="link" href="api-index-2-24.html#api-index-2.24">2.24</a></p> | |
| </div> | |
| </div> | |
| <div class="refsect1"> | |
| <a name="GMemoryOutputStream.see-also"></a><h2>See Also</h2> | |
| <p><a class="link" href="GMemoryInputStream.html" title="GMemoryInputStream"><span class="type">GMemoryInputStream</span></a></p> | |
| </div> | |
| </div> | |
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