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<a href="#CattleInstruction.synopsis" class="shortcut">Top</a>
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<a href="#CattleInstruction.description" class="shortcut">Description</a>
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<a href="#CattleInstruction.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<a href="#CattleInstruction.properties" class="shortcut">Properties</a>
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<div class="refentry">
<a name="CattleInstruction"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="CattleInstruction.top_of_page"></a>CattleInstruction</span></h2>
<p>CattleInstruction — Brainfuck instruction</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="CattleInstruction.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <cattle/cattle.h>
enum <a class="link" href="CattleInstruction.html#CattleInstructionValue" title="enum CattleInstructionValue">CattleInstructionValue</a>;
struct <a class="link" href="CattleInstruction.html#CattleInstruction-struct" title="struct CattleInstruction">CattleInstruction</a>;
<a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="returnvalue">CattleInstruction</span></a> * <a class="link" href="CattleInstruction.html#cattle-instruction-new" title="cattle_instruction_new ()">cattle_instruction_new</a> (<em class="parameter"><code><span class="type">void</span></code></em>);
<span class="returnvalue">void</span> <a class="link" href="CattleInstruction.html#cattle-instruction-set-value" title="cattle_instruction_set_value ()">cattle_instruction_set_value</a> (<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *instruction</code></em>,
<em class="parameter"><code><a class="link" href="CattleInstruction.html#CattleInstructionValue" title="enum CattleInstructionValue"><span class="type">CattleInstructionValue</span></a> value</code></em>);
<a class="link" href="CattleInstruction.html#CattleInstructionValue" title="enum CattleInstructionValue"><span class="returnvalue">CattleInstructionValue</span></a> <a class="link" href="CattleInstruction.html#cattle-instruction-get-value" title="cattle_instruction_get_value ()">cattle_instruction_get_value</a> (<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *instruction</code></em>);
<span class="returnvalue">void</span> <a class="link" href="CattleInstruction.html#cattle-instruction-set-quantity" title="cattle_instruction_set_quantity ()">cattle_instruction_set_quantity</a> (<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *instruction</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> quantity</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a> <a class="link" href="CattleInstruction.html#cattle-instruction-get-quantity" title="cattle_instruction_get_quantity ()">cattle_instruction_get_quantity</a> (<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *instruction</code></em>);
<span class="returnvalue">void</span> <a class="link" href="CattleInstruction.html#cattle-instruction-set-next" title="cattle_instruction_set_next ()">cattle_instruction_set_next</a> (<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *instruction</code></em>,
<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *next</code></em>);
<a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="returnvalue">CattleInstruction</span></a> * <a class="link" href="CattleInstruction.html#cattle-instruction-get-next" title="cattle_instruction_get_next ()">cattle_instruction_get_next</a> (<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *instruction</code></em>);
<span class="returnvalue">void</span> <a class="link" href="CattleInstruction.html#cattle-instruction-set-loop" title="cattle_instruction_set_loop ()">cattle_instruction_set_loop</a> (<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *instruction</code></em>,
<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *loop</code></em>);
<a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="returnvalue">CattleInstruction</span></a> * <a class="link" href="CattleInstruction.html#cattle-instruction-get-loop" title="cattle_instruction_get_loop ()">cattle_instruction_get_loop</a> (<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *instruction</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="CattleInstruction.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
<a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
+----CattleInstruction
</pre>
</div>
<div class="refsect1">
<a name="CattleInstruction.properties"></a><h2>Properties</h2>
<pre class="synopsis">
"<a class="link" href="CattleInstruction.html#CattleInstruction--loop" title='The "loop" property'>loop</a>" <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a>* : Read / Write
"<a class="link" href="CattleInstruction.html#CattleInstruction--next" title='The "next" property'>next</a>" <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a>* : Read / Write
"<a class="link" href="CattleInstruction.html#CattleInstruction--quantity" title='The "quantity" property'>quantity</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write
"<a class="link" href="CattleInstruction.html#CattleInstruction--value" title='The "value" property'>value</a>" <a class="link" href="CattleInstruction.html#CattleInstructionValue" title="enum CattleInstructionValue"><span class="type">CattleInstructionValue</span></a> : Read / Write
</pre>
</div>
<div class="refsect1">
<a name="CattleInstruction.description"></a><h2>Description</h2>
<p>
A <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> represents a single Brainfuck instruction,
repeated one or more times in a row.
</p>
<p>
Multiple instructions of the same type (i.e. multiple increment
instruction) are grouped together to reduce memory usage and speed
up execution.
</p>
<p>
Consider the following piece of Brainfuck code:
</p>
<p>
</p>
<div class="informalexample"><pre class="programlisting">
+++.-----
</pre></div>
<p>
</p>
<p>
There are nine instructions: three increment instructions, a print
instruction, and five decrement instructions.
</p>
<p>
Instead of creating nine separate objects, with all the involved
overhead, Cattle creates just three objects (one with value
<a class="link" href="CattleInstruction.html#CATTLE-INSTRUCTION-INCREASE:CAPS"><code class="literal">CATTLE_INSTRUCTION_INCREASE</code></a>, one with value <a class="link" href="CattleInstruction.html#CATTLE-INSTRUCTION-PRINT:CAPS"><code class="literal">CATTLE_INSTRUCTION_PRINT</code></a>,
and one with value <a class="link" href="CattleInstruction.html#CATTLE-INSTRUCTION-DECREASE:CAPS"><code class="literal">CATTLE_INSTRUCTION_DECREASE</code></a>) and set their quantity
to three, one and five respectively.
</p>
<p>
Each instruction maintains a reference to the next instruction in the
execution flow. If the instruction starts a loop (its value is
<a class="link" href="CattleInstruction.html#CATTLE-INSTRUCTION-LOOP-BEGIN:CAPS"><code class="literal">CATTLE_INSTRUCTION_LOOP_BEGIN</code></a>) it also holds a reference to the first
instruction in the loop.
</p>
</div>
<div class="refsect1">
<a name="CattleInstruction.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="CattleInstructionValue"></a><h3>enum CattleInstructionValue</h3>
<pre class="programlisting">typedef enum {
CATTLE_INSTRUCTION_NONE = 0x5F,
CATTLE_INSTRUCTION_MOVE_LEFT = 0x3C,
CATTLE_INSTRUCTION_MOVE_RIGHT = 0x3E,
CATTLE_INSTRUCTION_INCREASE = 0x2B,
CATTLE_INSTRUCTION_DECREASE = 0x2D,
CATTLE_INSTRUCTION_LOOP_BEGIN = 0x5B,
CATTLE_INSTRUCTION_LOOP_END = 0x5D,
CATTLE_INSTRUCTION_READ = 0x2C,
CATTLE_INSTRUCTION_PRINT = 0x2E,
CATTLE_INSTRUCTION_DEBUG = 0x23
} CattleInstructionValue;
</pre>
<p>
Brainfuck instructions supported by Cattle, as <a href="/usr/share/gtk-doc/html/glib/glib-Unicode-Manipulation.html#gunichar"><span class="type">gunichar</span></a>s.
</p>
<p>
<a class="link" href="CattleInstruction.html#CATTLE-INSTRUCTION-DEBUG:CAPS"><code class="literal">CATTLE_INSTRUCTION_DEBUG</code></a> is not part of the Brainfuck language, but
it's often used for debugging and implemented in many interpreters,
so it's included in Cattle as well.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="CATTLE-INSTRUCTION-NONE:CAPS"></a><span class="term"><code class="literal">CATTLE_INSTRUCTION_NONE</code></span></p></td>
<td>Do nothing
</td>
</tr>
<tr>
<td><p><a name="CATTLE-INSTRUCTION-MOVE-LEFT:CAPS"></a><span class="term"><code class="literal">CATTLE_INSTRUCTION_MOVE_LEFT</code></span></p></td>
<td>Move the tape to the left
</td>
</tr>
<tr>
<td><p><a name="CATTLE-INSTRUCTION-MOVE-RIGHT:CAPS"></a><span class="term"><code class="literal">CATTLE_INSTRUCTION_MOVE_RIGHT</code></span></p></td>
<td>Move the tape to the right
</td>
</tr>
<tr>
<td><p><a name="CATTLE-INSTRUCTION-INCREASE:CAPS"></a><span class="term"><code class="literal">CATTLE_INSTRUCTION_INCREASE</code></span></p></td>
<td>Increase the current value
</td>
</tr>
<tr>
<td><p><a name="CATTLE-INSTRUCTION-DECREASE:CAPS"></a><span class="term"><code class="literal">CATTLE_INSTRUCTION_DECREASE</code></span></p></td>
<td>Decrease the current value
</td>
</tr>
<tr>
<td><p><a name="CATTLE-INSTRUCTION-LOOP-BEGIN:CAPS"></a><span class="term"><code class="literal">CATTLE_INSTRUCTION_LOOP_BEGIN</code></span></p></td>
<td>Execute the loop until the current
value is zero, then proceed to the next instruction
</td>
</tr>
<tr>
<td><p><a name="CATTLE-INSTRUCTION-LOOP-END:CAPS"></a><span class="term"><code class="literal">CATTLE_INSTRUCTION_LOOP_END</code></span></p></td>
<td>Exit from the currently-executing loop
</td>
</tr>
<tr>
<td><p><a name="CATTLE-INSTRUCTION-READ:CAPS"></a><span class="term"><code class="literal">CATTLE_INSTRUCTION_READ</code></span></p></td>
<td>Get one character from the input and save
its value at the current position
</td>
</tr>
<tr>
<td><p><a name="CATTLE-INSTRUCTION-PRINT:CAPS"></a><span class="term"><code class="literal">CATTLE_INSTRUCTION_PRINT</code></span></p></td>
<td>Send the current value to the output.
</td>
</tr>
<tr>
<td><p><a name="CATTLE-INSTRUCTION-DEBUG:CAPS"></a><span class="term"><code class="literal">CATTLE_INSTRUCTION_DEBUG</code></span></p></td>
<td>Show debugging information. This usually
means dumping the contents of the tape.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="CattleInstruction-struct"></a><h3>struct CattleInstruction</h3>
<pre class="programlisting">struct CattleInstruction;</pre>
<p>
Opaque data structure representing an instruction. It should never be
accessed directly; use the methods below instead.
</p>
</div>
<hr>
<div class="refsect2">
<a name="cattle-instruction-new"></a><h3>cattle_instruction_new ()</h3>
<pre class="programlisting"><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="returnvalue">CattleInstruction</span></a> * cattle_instruction_new (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Create and initialize a new instruction.
</p>
<p>
The newly-created instruction has a <a class="link" href="CattleInstruction.html#CattleInstruction--quantity" title='The "quantity" property'><span class="type">"quantity"</span></a> of
one, and its <a class="link" href="CattleInstruction.html#CattleInstruction--value" title='The "value" property'><span class="type">"value"</span></a> is <a class="link" href="CattleInstruction.html#CATTLE-INSTRUCTION-NONE:CAPS"><code class="literal">CATTLE_INSTRUCTION_NONE</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="cattle-instruction-set-value"></a><h3>cattle_instruction_set_value ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> cattle_instruction_set_value (<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *instruction</code></em>,
<em class="parameter"><code><a class="link" href="CattleInstruction.html#CattleInstructionValue" title="enum CattleInstructionValue"><span class="type">CattleInstructionValue</span></a> value</code></em>);</pre>
<p>
Set the value of <em class="parameter"><code>instruction</code></em>. Accepted values are from the
<a class="link" href="CattleInstruction.html#CattleInstructionValue" title="enum CattleInstructionValue"><span class="type">CattleInstructionValue</span></a> enumeration.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>instruction</code></em> :</span></p></td>
<td>a <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>value of <em class="parameter"><code>instruction</code></em>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="cattle-instruction-get-value"></a><h3>cattle_instruction_get_value ()</h3>
<pre class="programlisting"><a class="link" href="CattleInstruction.html#CattleInstructionValue" title="enum CattleInstructionValue"><span class="returnvalue">CattleInstructionValue</span></a> cattle_instruction_get_value (<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *instruction</code></em>);</pre>
<p>
Get the value of <em class="parameter"><code>instruction</code></em>. See <a class="link" href="CattleInstruction.html#cattle-instruction-set-value" title="cattle_instruction_set_value ()"><code class="function">cattle_instruction_set_value()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>instruction</code></em> :</span></p></td>
<td>a <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the value of <em class="parameter"><code>instruction</code></em>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="cattle-instruction-set-quantity"></a><h3>cattle_instruction_set_quantity ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> cattle_instruction_set_quantity (<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *instruction</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> quantity</code></em>);</pre>
<p>
Set the number of times <em class="parameter"><code>instruction</code></em> has to be executed.
</p>
<p>
This value is used at runtime for faster execution, and allows to
use less memory for storing the code.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>instruction</code></em> :</span></p></td>
<td>a <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>quantity</code></em> :</span></p></td>
<td>quantity of <em class="parameter"><code>instruction</code></em>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="cattle-instruction-get-quantity"></a><h3>cattle_instruction_get_quantity ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a> cattle_instruction_get_quantity (<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *instruction</code></em>);</pre>
<p>
Get the quantity of <em class="parameter"><code>instruction</code></em>.
See <a class="link" href="CattleInstruction.html#cattle-instruction-set-quantity" title="cattle_instruction_set_quantity ()"><code class="function">cattle_instruction_set_quantity()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>instruction</code></em> :</span></p></td>
<td>a <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the quantity of <em class="parameter"><code>instruction</code></em>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="cattle-instruction-set-next"></a><h3>cattle_instruction_set_next ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> cattle_instruction_set_next (<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *instruction</code></em>,
<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *next</code></em>);</pre>
<p>
Set the next instruction to be executed.
</p>
<p>
If <em class="parameter"><code>instruction</code></em> has value <a class="link" href="CattleInstruction.html#CATTLE-INSTRUCTION-LOOP-BEGIN:CAPS"><code class="literal">CATTLE_INSTRUCTION_LOOP_BEGIN</code></a>, <em class="parameter"><code>next</code></em>
will be executed only after the loop has returned.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>instruction</code></em> :</span></p></td>
<td>a <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>next</code></em> :</span></p></td>
<td>next <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> to execute, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <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>
<hr>
<div class="refsect2">
<a name="cattle-instruction-get-next"></a><h3>cattle_instruction_get_next ()</h3>
<pre class="programlisting"><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="returnvalue">CattleInstruction</span></a> * cattle_instruction_get_next (<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *instruction</code></em>);</pre>
<p>
Get the next instruction.
</p>
<p>
Please note that the returned instruction might not be the next
instruction in the execution flow: if <em class="parameter"><code>instruction</code></em> marks the
beginning of a loop (its value is <a class="link" href="CattleInstruction.html#CATTLE-INSTRUCTION-LOOP-BEGIN:CAPS"><code class="literal">CATTLE_INSTRUCTION_LOOP_BEGIN</code></a>),
the returned instruction will be executed only after the loop has
ended.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>instruction</code></em> :</span></p></td>
<td>a <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the next instruction, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="cattle-instruction-set-loop"></a><h3>cattle_instruction_set_loop ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> cattle_instruction_set_loop (<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *instruction</code></em>,
<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *loop</code></em>);</pre>
<p>
Set the instructions to be executed in the loop.
</p>
<p>
This method should only be called on instructions whose value is
<a class="link" href="CattleInstruction.html#CATTLE-INSTRUCTION-LOOP-BEGIN:CAPS"><code class="literal">CATTLE_INSTRUCTION_LOOP_BEGIN</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>instruction</code></em> :</span></p></td>
<td>a <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>loop</code></em> :</span></p></td>
<td>first <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> in the loop, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <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>
<hr>
<div class="refsect2">
<a name="cattle-instruction-get-loop"></a><h3>cattle_instruction_get_loop ()</h3>
<pre class="programlisting"><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="returnvalue">CattleInstruction</span></a> * cattle_instruction_get_loop (<em class="parameter"><code><a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a> *instruction</code></em>);</pre>
<p>
Get the first instruction of the loop.
</p>
<p>
This method should only be called on instructions whose value is
<a class="link" href="CattleInstruction.html#CATTLE-INSTRUCTION-LOOP-BEGIN:CAPS"><code class="literal">CATTLE_INSTRUCTION_LOOP_BEGIN</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>instruction</code></em> :</span></p></td>
<td>a <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a>, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="CattleInstruction.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="CattleInstruction--loop"></a><h3>The <code class="literal">"loop"</code> property</h3>
<pre class="programlisting"> "loop" <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a>* : Read / Write</pre>
<p>
Instructions to be executed in the loop. Should be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> unless
the value of the instruction is <a class="link" href="CattleInstruction.html#CATTLE-INSTRUCTION-LOOP-BEGIN:CAPS"><code class="literal">CATTLE_INSTRUCTION_LOOP_BEGIN</code></a>.
</p>
<p>
Changes to this property are not notified.
</p>
</div>
<hr>
<div class="refsect2">
<a name="CattleInstruction--next"></a><h3>The <code class="literal">"next"</code> property</h3>
<pre class="programlisting"> "next" <a class="link" href="CattleInstruction.html" title="CattleInstruction"><span class="type">CattleInstruction</span></a>* : Read / Write</pre>
<p>
Next instruction in the execution flow. Can be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if there
are no more instructions to be executed.
</p>
<p>
Changes to this property are not notified.
</p>
</div>
<hr>
<div class="refsect2">
<a name="CattleInstruction--quantity"></a><h3>The <code class="literal">"quantity"</code> property</h3>
<pre class="programlisting"> "quantity" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write</pre>
<p>
Number of times the instruction has to be executed.
</p>
<p>
Changes to this property are not notified.
</p>
<p>Allowed values: >= 0</p>
<p>Default value: 1</p>
</div>
<hr>
<div class="refsect2">
<a name="CattleInstruction--value"></a><h3>The <code class="literal">"value"</code> property</h3>
<pre class="programlisting"> "value" <a class="link" href="CattleInstruction.html#CattleInstructionValue" title="enum CattleInstructionValue"><span class="type">CattleInstructionValue</span></a> : Read / Write</pre>
<p>
Value of the instruction. Accepted values are in the
<a class="link" href="CattleInstruction.html#CattleInstructionValue" title="enum CattleInstructionValue"><span class="type">CattleInstructionValue</span></a> enumeration.
</p>
<p>
Changes to this property are not notified.
</p>
<p>Default value: CATTLE_INSTRUCTION_NONE</p>
</div>
</div>
</div>
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