67 lines
1.1 KiB
Markdown
67 lines
1.1 KiB
Markdown
```js
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function l(A: number,B: number, C: number, out: (o: number)=> void) {
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do {
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B = A % 8
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B = B ^ 1
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C = Math.floor(A / Math.pow(2,B))
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B = B ^ 5;
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A = Math.floor(A / 8);
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B = B ^ C;
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out(B % 8)
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}
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while (A !== 0);
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}
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```
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프로그램은 이렇다.
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바꿔보자.
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```js
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function l(A: number, out: (o: number)=> void) {
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do {
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out(((((A & 7) ^ 1) ^ 5) ^ (A >> ((A & 7) ^ 1))) & 7);
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A = A >> 3;
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}
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while (A !== 0);
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}
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```
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0b001
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0b101
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0b100
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(((A & 7) ^ 4) ^ (A >> ((A & 7) ^ 1) )) & 7
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((A ^ 4) & 7) ^ ((A >> ((A & 7) ^ 1)) & 7) = k
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```js
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function l(A: number,B: number, C: number, out: (o: number)=> void) {
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do {
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B = A & 7
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B = B ^ 1
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C = A >> B
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B = B ^ 5;
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B = B ^ C;
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out(B & 7)
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A = A >> 3;
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}
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while (A !== 0);
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}
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```
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B: 0..7 as
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A: 3bit array
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```js
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function l(A: number[], out: (o:number) => void) {
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let i = 0;
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do {
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B = A[i + 2] * 4 + A[i+1] * 2 + A[i]
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B ^= 1
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C = A[i + B + 2] * 4 + A[i + B + 1] * 2 + A[i + B]
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B = B ^ 5;
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B ^= C;
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out(B);
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i += 3;
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}
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}
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```
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