| <?php |
|
|
| namespace Random\Engine\Test; |
|
|
| use Random\Engine; |
|
|
| final class TestShaEngine implements Engine |
| { |
| private string $state; |
|
|
| public function __construct(?string $state = null) |
| { |
| if ($state !== null) { |
| $this->state = $state; |
| } else { |
| $this->state = random_bytes(20); |
| } |
| } |
|
|
| public function generate(): string |
| { |
| $this->state = sha1($this->state, true); |
|
|
| return substr($this->state, 0, 8); |
| } |
| } |
|
|
| final class TestWrapperEngine implements Engine |
| { |
| private int $count = 0; |
|
|
| public function __construct(private readonly Engine $engine) |
| { |
| } |
|
|
| public function generate(): string |
| { |
| $this->count++; |
|
|
| return $this->engine->generate(); |
| } |
|
|
| public function getCount(): int |
| { |
| return $this->count; |
| } |
| } |
|
|
| final class TestXoshiro128PlusPlusEngine implements Engine |
| { |
| public function __construct( |
| private int $s0, |
| private int $s1, |
| private int $s2, |
| private int $s3 |
| ) { |
| } |
|
|
| private static function rotl($x, $k) |
| { |
| return (($x << $k) | ($x >> (32 - $k))) & 0xFFFFFFFF; |
| } |
|
|
| public function generate(): string |
| { |
| $result = (self::rotl(($this->s0 + $this->s3) & 0xFFFFFFFF, 7) + $this->s0) & 0xFFFFFFFF; |
|
|
| $t = ($this->s1 << 9) & 0xFFFFFFFF; |
|
|
| $this->s2 ^= $this->s0; |
| $this->s3 ^= $this->s1; |
| $this->s1 ^= $this->s2; |
| $this->s0 ^= $this->s3; |
|
|
| $this->s2 ^= $t; |
|
|
| $this->s3 = self::rotl($this->s3, 11); |
|
|
| return pack('V', $result); |
| } |
| } |
|
|
| final class TestCountingEngine32 implements Engine |
| { |
| private int $count = 0; |
|
|
| public function generate(): string |
| { |
| return pack('V', $this->count++); |
| } |
| } |
|
|
| final class TestCountingEngine64 implements Engine |
| { |
| private int $count = 0; |
|
|
| public function generate(): string |
| { |
| if ($this->count > 2147483647 || $this->count < 0) { |
| throw new \Exception('Overflow'); |
| } |
| return pack('V', $this->count++) . "\x00\x00\x00\x00"; |
| } |
| } |
|
|
| ?> |
|
|
