| @@ 45-66 (lines=22) @@ | ||
| 42 | * |
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| 43 | * @return array |
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| 44 | */ |
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| 45 | public function generateTable(int $polynomial): array |
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| 46 | { |
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| 47 | $tableSize = 256; |
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| 48 | ||
| 49 | $table = []; |
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| 50 | ||
| 51 | for ($iterator = 0; $iterator < $tableSize; ++$iterator) { |
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| 52 | $temp = 0; |
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| 53 | $a = ($iterator << 8); |
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| 54 | for ($j = 0; $j < 8; ++$j) { |
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| 55 | if ((($temp ^ $a) & 0x8000) !== 0) { |
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| 56 | $temp = (($temp << 1) ^ $polynomial); |
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| 57 | } else { |
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| 58 | $temp <<= 1; |
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| 59 | } |
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| 60 | $a <<= 1; |
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| 61 | } |
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| 62 | $table[$iterator] = $temp & 0xffff; |
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| 63 | } |
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| 64 | ||
| 65 | return $table; |
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| 66 | } |
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| 67 | } |
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| 68 | ||
| @@ 45-66 (lines=22) @@ | ||
| 42 | * |
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| 43 | * @return array |
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| 44 | */ |
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| 45 | public function generateTable(int $polynomial): array |
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| 46 | { |
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| 47 | $tableSize = 256; |
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| 48 | ||
| 49 | $table = []; |
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| 50 | ||
| 51 | for ($iterator = 0; $iterator < $tableSize; ++$iterator) { |
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| 52 | $temp = 0; |
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| 53 | $a = $iterator; |
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| 54 | for ($j = 0; $j < 8; ++$j) { |
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| 55 | if ((($temp ^ $a) & 0x80) !== 0) { |
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| 56 | $temp = (($temp << 1) ^ $polynomial); |
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| 57 | } else { |
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| 58 | $temp <<= 1; |
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| 59 | } |
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| 60 | $a <<= 1; |
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| 61 | } |
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| 62 | $table[$iterator] = $temp & 0xff; |
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| 63 | } |
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| 64 | ||
| 65 | return $table; |
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| 66 | } |
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| 67 | } |
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| 68 | ||