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}

[1000] Fix | Delete

private function isPreviousCoreFile($hexContentsSHAC) {

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$hasPrefix = $this->_binaryListContains($this->coreHashesData, wfUtils::hex2bin($hexContentsSHAC), 32);

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return $hasPrefix !== false;

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}

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/**

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* @param $binaryList The binary list to search, sorted as a binary string.

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* @param $needle The binary needle to search for.

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* @param int $size The byte size of each item in the list.

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* @return bool|int false if not found, otherwise the index in the list

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private function _binaryListContains($binaryList, $needle, $size /* bytes */) {

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$p = substr($needle, 0, $size);

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$count = ceil(wfWAFUtils::strlen($binaryList) / $size);

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$low = 0;

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$high = $count - 1;

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while ($low <= $high) {

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$mid = (int) (($high + $low) / 2);

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$val = wfWAFUtils::substr($binaryList, $mid * $size, $size);

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$cmp = strcmp($val, $p);

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if ($cmp < 0) {

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$low = $mid + 1;

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}

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else if ($cmp > 0) {

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$high = $mid - 1;

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}

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else {

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return $mid;

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}

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}

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return false;

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}

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}

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