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Handling function calls that accept an excel error as an argument (#890)

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Mark Baker 2019-02-17 17:32:45 +01:00 committed by GitHub
parent a54ed63a6f
commit f4f4d513e7
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1 changed files with 20 additions and 15 deletions
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35
src/PhpSpreadsheet/Shared/OLE.php
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@ -537,31 +537,36 @@ class OLE
/**
* Returns a timestamp from an OLE container's date.
*
* @param int $string A binary string with the encoded date
* @param string $oleTimestamp A binary string with the encoded date
*
* @return string The timestamp corresponding to the string
* @return int The Unix timestamp corresponding to the string
* @throws ReaderException
*/
public static function OLE2LocalDate($string)
public static function OLE2LocalDate($oleTimestamp)
{
if (strlen($string) != 8) {
if (strlen($oleTimestamp) != 8) {
throw new ReaderException('Expecting 8 byte string');
}
// factor used for separating numbers into 4 bytes parts
$factor = pow(2, 32);
list(, $high_part) = unpack('V', substr($string, 4, 4));
list(, $low_part) = unpack('V', substr($string, 0, 4));
// convert to units of 100 ns since 1601:
$unpackedTimestamp = unpack('v4', $oleTimestamp);
$timestampHigh = (float)$unpackedTimestamp[4] * 65536 + (float)$unpackedTimestamp[3];
$timestampLow = (float)$unpackedTimestamp[2] * 65536 + (float)$unpackedTimestamp[1];
$big_date = ($high_part * $factor) + $low_part;
// translate to seconds
$big_date /= 10000000;
// translate to seconds since 1601:
$timestampHigh /= 10000000;
$timestampLow /= 10000000;
// days from 1-1-1601 until the beggining of UNIX era
// days from 1601 to 1970:
$days = 134774;
// translate to seconds from beggining of UNIX era
$big_date -= $days * 24 * 3600;
// translate to seconds since 1970:
$unixTimestamp = floor(65536.0 * 65536.0 * $timestampHigh + $timestampLow - $days * 24 * 3600 + 0.5);
return floor($big_date);
if( (int) $unixTimestamp == $unixTimestamp ) {
return (int) $unixTimestamp;
} else {
return $unixTimestamp >= 0.0 ? PHP_INT_MAX : PHP_INT_MIN;
}
}
}