68 lines
1.2 KiB
Go
68 lines
1.2 KiB
Go
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package xor
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import "math"
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/* (1) bitwise XOR between bytes
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*
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* @_left<byte> Left operand
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* @_right<byte> Right operand
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*
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* @return out<byte> Bitwise XOR result between _left and _right
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*
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---------------------------------------------------------*/
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func Byte(_left byte, _right byte) byte {
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return _left ^ _right;
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}
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/* (2) bitwise XOR between Byte arrays
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*
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* @_left<byte[]> Left operand
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* @_right<byte[]> Right operand
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*
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* @return out<byte[]> Bitwise XOR result between _left and _right
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*
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* @@ NOTE @@
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* If an argument is smaller, it will be right-padded with null bytes (0x00)
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*
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---------------------------------------------------------*/
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func ByteArray(_left []byte, _right []byte) []byte {
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/* (1) Process
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---------------------------------------------------------*/
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/* (1) Extract lengths */
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ll := len(_left)
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lr := len(_right)
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/* (2) Get max length */
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l := int(math.Max(float64(ll), float64(lr)))
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/* (3) Initialise 'out' */
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out := make([]byte, l, l)
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/* (2) Process bitwise XOR */
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for i := 0 ; i < l ; i++ {
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// 1. Out of range for _left
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if i >= ll {
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out[i] = _right[i];
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} else if i >= lr {
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out[i] = _left[i];
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} else {
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out[i] = Byte(_left[i], _right[i])
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}
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}
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return out
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}
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