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<?php

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namespace Wordfence\MmdbReader;

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use Wordfence\MmdbReader\Exception\InvalidOperationException;

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class NodeRecord {

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private $reader;

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private $value;

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public function __construct($reader, $value) {

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$this->reader = $reader;

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$this->value = $value;

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}

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public function getValue() {

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return $this->value;

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}

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public function isNodePointer() {

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return $this->value < $this->reader->getNodeCount();

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}

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public function getNextNode() {

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if (!$this->isNodePointer())

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throw new InvalidOperationException('The next node was requested for a record that is not a node pointer');

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try {

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return $this->reader->read($this->getValue());

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}

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catch (InvalidOperationException $e) {

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throw new FormatException('Invalid node pointer found in database', $e);

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}

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}

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public function isNullPointer() {

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return $this->value === $this->reader->getNodeCount();

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}

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public function isDataPointer() {

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return $this->value > $this->reader->getNodeCount();

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}

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public function getDataAddress() {

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if (!$this->isDataPointer())

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throw new InvalidOperationException('The data address was requested for a record that is not a data pointer');

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return $this->value - $this->reader->getNodeCount() + $this->reader->getSearchTreeSectionSize();

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}

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}

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