mirror of
https://github.com/yann-shi/dht.git
synced 2026-10-16 20:21:06 +08:00
Lime
26 lines
429 B
Go
26 lines
429 B
Go
// +build amd64 386
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package dht
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import "unsafe"
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const wordSize = int(unsafe.Sizeof(uintptr(0)))
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func xor(dst, a, b []byte) {
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n := len(a)
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w := n / wordSize
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if w > 0 {
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dw := *(*[]uintptr)(unsafe.Pointer(&dst))
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aw := *(*[]uintptr)(unsafe.Pointer(&a))
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bw := *(*[]uintptr)(unsafe.Pointer(&b))
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for i := 0; i < w; i++ {
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dw[i] = aw[i] ^ bw[i]
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}
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}
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for i := n - n%wordSize; i < n; i++ {
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dst[i] = a[i] ^ b[i]
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}
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}
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