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<a href="#id3267699" class="shortcut">Description</a></nobr></td></tr>
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<div class="refentry" lang="en">
<a name="glib-Byte-Arrays"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2>
<a name="id3267336"></a><span class="refentrytitle">Byte Arrays</span>
</h2>
<p>Byte Arrays — arrays of bytes, which grow automatically as elements are added.</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">
#include <glib.h>
<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>;
<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>* <a href="glib-Byte-Arrays.html#g-byte-array-new">g_byte_array_new</a> (void);
<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>* <a href="glib-Byte-Arrays.html#g-byte-array-sized-new">g_byte_array_sized_new</a> (<a href="glib-Basic-Types.html#guint">guint</a> reserved_size);
<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>* <a href="glib-Byte-Arrays.html#g-byte-array-append">g_byte_array_append</a> (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
const <a href="glib-Basic-Types.html#guint8">guint8</a> *data,
<a href="glib-Basic-Types.html#guint">guint</a> len);
<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>* <a href="glib-Byte-Arrays.html#g-byte-array-prepend">g_byte_array_prepend</a> (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
const <a href="glib-Basic-Types.html#guint8">guint8</a> *data,
<a href="glib-Basic-Types.html#guint">guint</a> len);
<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>* <a href="glib-Byte-Arrays.html#g-byte-array-remove-index">g_byte_array_remove_index</a> (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
<a href="glib-Basic-Types.html#guint">guint</a> index_);
<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>* <a href="glib-Byte-Arrays.html#g-byte-array-remove-index-fast">g_byte_array_remove_index_fast</a> (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
<a href="glib-Basic-Types.html#guint">guint</a> index_);
<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>* <a href="glib-Byte-Arrays.html#g-byte-array-remove-range">g_byte_array_remove_range</a> (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
<a href="glib-Basic-Types.html#guint">guint</a> index_,
<a href="glib-Basic-Types.html#guint">guint</a> length);
void <a href="glib-Byte-Arrays.html#g-byte-array-sort">g_byte_array_sort</a> (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
<a href="glib-Doubly-Linked-Lists.html#GCompareFunc">GCompareFunc</a> compare_func);
void <a href="glib-Byte-Arrays.html#g-byte-array-sort-with-data">g_byte_array_sort_with_data</a> (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
<a href="glib-Doubly-Linked-Lists.html#GCompareDataFunc">GCompareDataFunc</a> compare_func,
<a href="glib-Basic-Types.html#gpointer">gpointer</a> user_data);
<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>* <a href="glib-Byte-Arrays.html#g-byte-array-set-size">g_byte_array_set_size</a> (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
<a href="glib-Basic-Types.html#guint">guint</a> length);
<a href="glib-Basic-Types.html#guint8">guint8</a>* <a href="glib-Byte-Arrays.html#g-byte-array-free">g_byte_array_free</a> (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
<a href="glib-Basic-Types.html#gboolean">gboolean</a> free_segment);
</pre>
</div>
<div class="refsect1" lang="en">
<a name="id3267699"></a><h2>Description</h2>
<p>
<a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a> is based on <a href="glib-Arrays.html#GArray"><span class="type">GArray</span></a>, to provide arrays of bytes which grow
automatically as elements are added.
</p>
<p>
To create a new <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a> use <a href="glib-Byte-Arrays.html#g-byte-array-new"><code class="function">g_byte_array_new()</code></a>.
</p>
<p>
To add elements to a <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>, use <a href="glib-Byte-Arrays.html#g-byte-array-append"><code class="function">g_byte_array_append()</code></a>, and
<a href="glib-Byte-Arrays.html#g-byte-array-prepend"><code class="function">g_byte_array_prepend()</code></a>.
</p>
<p>
To set the size of a <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>, use <a href="glib-Byte-Arrays.html#g-byte-array-set-size"><code class="function">g_byte_array_set_size()</code></a>.
</p>
<p>
To free a <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>, use <a href="glib-Byte-Arrays.html#g-byte-array-free"><code class="function">g_byte_array_free()</code></a>.
</p>
<div class="example">
<a name="id3267829"></a><p class="title"><b>Example 8. Using a <span class="structname">GByteArray</span></b></p>
<pre class="programlisting">
GByteArray *gbarray;
gint i;
gbarray = g_byte_array_new ();
for (i = 0; i < 10000; i++)
g_byte_array_append (gbarray, (guint8*) "abcd", 4);
for (i = 0; i < 10000; i++)
{
g_assert (gbarray->data[4*i] == 'a');
g_assert (gbarray->data[4*i+1] == 'b');
g_assert (gbarray->data[4*i+2] == 'c');
g_assert (gbarray->data[4*i+3] == 'd');
}
g_byte_array_free (gbarray, TRUE);
</pre>
</div>
</div>
<div class="refsect1" lang="en">
<a name="id3267864"></a><h2>Details</h2>
<div class="refsect2" lang="en">
<a name="id3267874"></a><h3>
<a name="GByteArray"></a>GByteArray</h3>
<a class="indexterm" name="id3267887"></a><pre class="programlisting">typedef struct {
guint8 *data;
guint len;
} GByteArray;
</pre>
<p>
The <span class="structname">GByteArray</span> struct allows access to the public fields of a <span class="structname">GByteArray</span>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><a href="glib-Basic-Types.html#guint8">guint8</a> *<em class="structfield"><code>data</code></em>;</span></td>
<td>a pointer to the element data. The data may be moved as elements are
added to the <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
<tr>
<td>
<span class="term"><a href="glib-Basic-Types.html#guint">guint</a> <em class="structfield"><code>len</code></em>;</span></td>
<td>the number of elements in the <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3267972"></a><h3>
<a name="g-byte-array-new"></a>g_byte_array_new ()</h3>
<a class="indexterm" name="id3267985"></a><pre class="programlisting"><a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>* g_byte_array_new (void);</pre>
<p>
Creates a new <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td>the new <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3268037"></a><h3>
<a name="g-byte-array-sized-new"></a>g_byte_array_sized_new ()</h3>
<a class="indexterm" name="id3268050"></a><pre class="programlisting"><a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>* g_byte_array_sized_new (<a href="glib-Basic-Types.html#guint">guint</a> reserved_size);</pre>
<p>
Creates a new <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a> with <em class="parameter"><code>reserved_size</code></em> bytes preallocated. This
avoids frequent reallocation, if you are going to add many bytes to
the array. Note however that the size of the array is still 0.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>reserved_size</code></em> :</span></td>
<td>number of bytes preallocated.
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td>the new <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3268132"></a><h3>
<a name="g-byte-array-append"></a>g_byte_array_append ()</h3>
<a class="indexterm" name="id3268146"></a><pre class="programlisting"><a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>* g_byte_array_append (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
const <a href="glib-Basic-Types.html#guint8">guint8</a> *data,
<a href="glib-Basic-Types.html#guint">guint</a> len);</pre>
<p>
Adds the given bytes to the end of the <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
The array will grow in size automatically if necessary.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>array</code></em> :</span></td>
<td>a <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>data</code></em> :</span></td>
<td>the byte data to be added.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>len</code></em> :</span></td>
<td>the number of bytes to add.
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td>the <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3268270"></a><h3>
<a name="g-byte-array-prepend"></a>g_byte_array_prepend ()</h3>
<a class="indexterm" name="id3268283"></a><pre class="programlisting"><a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>* g_byte_array_prepend (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
const <a href="glib-Basic-Types.html#guint8">guint8</a> *data,
<a href="glib-Basic-Types.html#guint">guint</a> len);</pre>
<p>
Adds the given data to the start of the <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
The array will grow in size automatically if necessary.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>array</code></em> :</span></td>
<td>a <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>data</code></em> :</span></td>
<td>the byte data to be added.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>len</code></em> :</span></td>
<td>the number of bytes to add.
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td>the <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3268408"></a><h3>
<a name="g-byte-array-remove-index"></a>g_byte_array_remove_index ()</h3>
<a class="indexterm" name="id3268422"></a><pre class="programlisting"><a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>* g_byte_array_remove_index (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
<a href="glib-Basic-Types.html#guint">guint</a> index_);</pre>
<p>
Removes the byte at the given index from a <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
The following bytes are moved down one place.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>array</code></em> :</span></td>
<td>a <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>index_</code></em> :</span></td>
<td>the index of the byte to remove.
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td>the <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3268525"></a><h3>
<a name="g-byte-array-remove-index-fast"></a>g_byte_array_remove_index_fast ()</h3>
<a class="indexterm" name="id3268538"></a><pre class="programlisting"><a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>* g_byte_array_remove_index_fast (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
<a href="glib-Basic-Types.html#guint">guint</a> index_);</pre>
<p>
Removes the byte at the given index from a <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
The last element in the array is used to fill in the space, so this function
does not preserve the order of the <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>. But it is faster than
<a href="glib-Byte-Arrays.html#g-byte-array-remove-index"><code class="function">g_byte_array_remove_index()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>array</code></em> :</span></td>
<td>a <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>index_</code></em> :</span></td>
<td>the index of the byte to remove.
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td>the <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3268662"></a><h3>
<a name="g-byte-array-remove-range"></a>g_byte_array_remove_range ()</h3>
<a class="indexterm" name="id3268678"></a><pre class="programlisting"><a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>* g_byte_array_remove_range (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
<a href="glib-Basic-Types.html#guint">guint</a> index_,
<a href="glib-Basic-Types.html#guint">guint</a> length);</pre>
<p>
Removes the given number of bytes starting at the given index from a
<a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>. The following elements are moved to close the gap.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>array</code></em> :</span></td>
<td>a <em class="parameter"><code>GByteArray</code></em>.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>index_</code></em> :</span></td>
<td>the index of the first byte to remove.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>length</code></em> :</span></td>
<td>the number of bytes to remove.
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td>the <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
</tbody>
</table></div>
<p>Since 2.4
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3268806"></a><h3>
<a name="g-byte-array-sort"></a>g_byte_array_sort ()</h3>
<a class="indexterm" name="id3268819"></a><pre class="programlisting">void g_byte_array_sort (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
<a href="glib-Doubly-Linked-Lists.html#GCompareFunc">GCompareFunc</a> compare_func);</pre>
<p>
Sorts a byte array, using <em class="parameter"><code>compare_func</code></em> which should be a <code class="function">qsort()</code>-style
comparison function (returns less than zero for first arg is less than second
arg, zero for equal, greater than zero if first arg is greater than second
arg).
</p>
<p>
If two array elements compare equal, their order in the sorted array is
undefined.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>array</code></em> :</span></td>
<td>a <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>compare_func</code></em> :</span></td>
<td>comparison function.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3268919"></a><h3>
<a name="g-byte-array-sort-with-data"></a>g_byte_array_sort_with_data ()</h3>
<a class="indexterm" name="id3268933"></a><pre class="programlisting">void g_byte_array_sort_with_data (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
<a href="glib-Doubly-Linked-Lists.html#GCompareDataFunc">GCompareDataFunc</a> compare_func,
<a href="glib-Basic-Types.html#gpointer">gpointer</a> user_data);</pre>
<p>
Like <a href="glib-Byte-Arrays.html#g-byte-array-sort"><code class="function">g_byte_array_sort()</code></a>, but the comparison function takes an extra user data
argument.
</p>
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<td>
<span class="term"><em class="parameter"><code>array</code></em> :</span></td>
<td>a <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>compare_func</code></em> :</span></td>
<td>comparison function.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>user_data</code></em> :</span></td>
<td>data to pass to <em class="parameter"><code>compare_func</code></em>.
</td>
</tr>
</tbody>
</table></div>
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<hr>
<div class="refsect2" lang="en">
<a name="id3269049"></a><h3>
<a name="g-byte-array-set-size"></a>g_byte_array_set_size ()</h3>
<a class="indexterm" name="id3269061"></a><pre class="programlisting"><a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a>* g_byte_array_set_size (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
<a href="glib-Basic-Types.html#guint">guint</a> length);</pre>
<p>
Sets the size of the <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>, expanding it if necessary.
</p>
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<td>
<span class="term"><em class="parameter"><code>array</code></em> :</span></td>
<td>a <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>length</code></em> :</span></td>
<td>the new size of the <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td>the <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3269172"></a><h3>
<a name="g-byte-array-free"></a>g_byte_array_free ()</h3>
<a class="indexterm" name="id3269185"></a><pre class="programlisting"><a href="glib-Basic-Types.html#guint8">guint8</a>* g_byte_array_free (<a href="glib-Byte-Arrays.html#GByteArray">GByteArray</a> *array,
<a href="glib-Basic-Types.html#gboolean">gboolean</a> free_segment);</pre>
<p>
Frees the memory allocated by the <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
If <em class="parameter"><code>free_segment</code></em> is <a href="glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> it frees the actual byte data.
</p>
<div class="variablelist"><table border="0">
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<td>
<span class="term"><em class="parameter"><code>array</code></em> :</span></td>
<td>a <a href="glib-Byte-Arrays.html#GByteArray"><span class="type">GByteArray</span></a>.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>free_segment</code></em> :</span></td>
<td>if <a href="glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> the actual byte data is freed as well.
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td>the element data if <em class="parameter"><code>free_segment</code></em> is <a href="glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>, otherwise <a href="glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
</td>
</tr>
</tbody>
</table></div>
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