macro/command/crc32.html

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<h1>crc32</h1>

<p>
Calculates the CRC-32 of a string.
</p>

<pre class="macro-syntax">
crc32 &lt;string&gt;
</pre>

<h2>Remarks</h2>

<p>
This macro function calculates the CRC(Cyclic Redundancy Checking) of a string. The polynomial expression(right rotation) is as follows:
<br><br>

100000100110000010001110110110111 (x<sup>32</sup>+x<sup>26</sup>+x<sup>23</sup>+x<sup>22</sup>+x<sup>16</sup>+x<sup>12</sup>+x<sup>11</sup>+x<sup>10</sup>+x<sup>8</sup>+x<sup>7</sup>+x<sup>5</sup>+x<sup>4</sup>+x<sup>2</sup>+x<sup>1</sup>+x<sup>0</sup>)
<br><br>

The calculated value stores the system variable "result" as mathematival value.
</p>

<h2>Example</h2>

<pre class="macro-example">
<code>
str = 'this is a test string to be CRC32ed'
crc32 str

; Display CRC32 result asHEX
sprintf '0x%08X' result
messagebox inputstr 'CRC32 = '
</code></pre>

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