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What do the symbols and mean? I'm trying to understand them to make an app.

It's on http://en.wikipedia.org/wiki/File:XXTEA.png

http://en.wikipedia.org/wiki/File:XXTEA.png

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From the context it is obvious that the squared + is simply an addition. –  SK-logic Mar 13 '11 at 16:54
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up vote 5 down vote accepted

I know for a fact that ⊕ means XOR, or eXclusive OR. With the variables A and B, Normal OR will return true if

  • A=true and b=false
  • A=false and B=true
  • A=true and B=true

XOR on the other hand returns true only if

  • A=false and B=true
  • A=true and B=false

I'm not too sure about ⊞ though. In Unicode its under "SQUARED PLUS", but I don't know how that works in an algorithm

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