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Direktori : /home2/selectio/www/fms-worksuite/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/ |
Current File : /home2/selectio/www/fms-worksuite/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/OLE.php |
<?php namespace PhpOffice\PhpSpreadsheet\Shared; // vim: set expandtab tabstop=4 shiftwidth=4: // +----------------------------------------------------------------------+ // | PHP Version 4 | // +----------------------------------------------------------------------+ // | Copyright (c) 1997-2002 The PHP Group | // +----------------------------------------------------------------------+ // | This source file is subject to version 2.02 of the PHP license, | // | that is bundled with this package in the file LICENSE, and is | // | available at through the world-wide-web at | // | http://www.php.net/license/2_02.txt. | // | If you did not receive a copy of the PHP license and are unable to | // | obtain it through the world-wide-web, please send a note to | // | license@php.net so we can mail you a copy immediately. | // +----------------------------------------------------------------------+ // | Author: Xavier Noguer <xnoguer@php.net> | // | Based on OLE::Storage_Lite by Kawai, Takanori | // +----------------------------------------------------------------------+ // use PhpOffice\PhpSpreadsheet\Exception; use PhpOffice\PhpSpreadsheet\Reader\Exception as ReaderException; use PhpOffice\PhpSpreadsheet\Shared\OLE\ChainedBlockStream; use PhpOffice\PhpSpreadsheet\Shared\OLE\PPS\Root; /* * Array for storing OLE instances that are accessed from * OLE_ChainedBlockStream::stream_open(). * * @var array */ $GLOBALS['_OLE_INSTANCES'] = []; /** * OLE package base class. * * @author Xavier Noguer <xnoguer@php.net> * @author Christian Schmidt <schmidt@php.net> */ class OLE { const OLE_PPS_TYPE_ROOT = 5; const OLE_PPS_TYPE_DIR = 1; const OLE_PPS_TYPE_FILE = 2; const OLE_DATA_SIZE_SMALL = 0x1000; const OLE_LONG_INT_SIZE = 4; const OLE_PPS_SIZE = 0x80; /** * The file handle for reading an OLE container. * * @var resource */ public $_file_handle; /** * Array of PPS's found on the OLE container. * * @var array */ public $_list = []; /** * Root directory of OLE container. * * @var Root */ public $root; /** * Big Block Allocation Table. * * @var array (blockId => nextBlockId) */ public $bbat; /** * Short Block Allocation Table. * * @var array (blockId => nextBlockId) */ public $sbat; /** * Size of big blocks. This is usually 512. * * @var int number of octets per block */ public $bigBlockSize; /** * Size of small blocks. This is usually 64. * * @var int number of octets per block */ public $smallBlockSize; /** * Threshold for big blocks. * * @var int */ public $bigBlockThreshold; /** * Reads an OLE container from the contents of the file given. * * @acces public * * @param string $filename * * @return bool true on success, PEAR_Error on failure */ public function read($filename) { $fh = @fopen($filename, 'rb'); if ($fh === false) { throw new ReaderException("Can't open file $filename"); } $this->_file_handle = $fh; $signature = fread($fh, 8); if ("\xD0\xCF\x11\xE0\xA1\xB1\x1A\xE1" != $signature) { throw new ReaderException("File doesn't seem to be an OLE container."); } fseek($fh, 28); if (fread($fh, 2) != "\xFE\xFF") { // This shouldn't be a problem in practice throw new ReaderException('Only Little-Endian encoding is supported.'); } // Size of blocks and short blocks in bytes $this->bigBlockSize = 2 ** self::readInt2($fh); $this->smallBlockSize = 2 ** self::readInt2($fh); // Skip UID, revision number and version number fseek($fh, 44); // Number of blocks in Big Block Allocation Table $bbatBlockCount = self::readInt4($fh); // Root chain 1st block $directoryFirstBlockId = self::readInt4($fh); // Skip unused bytes fseek($fh, 56); // Streams shorter than this are stored using small blocks $this->bigBlockThreshold = self::readInt4($fh); // Block id of first sector in Short Block Allocation Table $sbatFirstBlockId = self::readInt4($fh); // Number of blocks in Short Block Allocation Table $sbbatBlockCount = self::readInt4($fh); // Block id of first sector in Master Block Allocation Table $mbatFirstBlockId = self::readInt4($fh); // Number of blocks in Master Block Allocation Table $mbbatBlockCount = self::readInt4($fh); $this->bbat = []; // Remaining 4 * 109 bytes of current block is beginning of Master // Block Allocation Table $mbatBlocks = []; for ($i = 0; $i < 109; ++$i) { $mbatBlocks[] = self::readInt4($fh); } // Read rest of Master Block Allocation Table (if any is left) $pos = $this->getBlockOffset($mbatFirstBlockId); for ($i = 0; $i < $mbbatBlockCount; ++$i) { fseek($fh, $pos); for ($j = 0; $j < $this->bigBlockSize / 4 - 1; ++$j) { $mbatBlocks[] = self::readInt4($fh); } // Last block id in each block points to next block $pos = $this->getBlockOffset(self::readInt4($fh)); } // Read Big Block Allocation Table according to chain specified by $mbatBlocks for ($i = 0; $i < $bbatBlockCount; ++$i) { $pos = $this->getBlockOffset($mbatBlocks[$i]); fseek($fh, $pos); for ($j = 0; $j < $this->bigBlockSize / 4; ++$j) { $this->bbat[] = self::readInt4($fh); } } // Read short block allocation table (SBAT) $this->sbat = []; $shortBlockCount = $sbbatBlockCount * $this->bigBlockSize / 4; $sbatFh = $this->getStream($sbatFirstBlockId); for ($blockId = 0; $blockId < $shortBlockCount; ++$blockId) { $this->sbat[$blockId] = self::readInt4($sbatFh); } fclose($sbatFh); $this->readPpsWks($directoryFirstBlockId); return true; } /** * @param int $blockId byte offset from beginning of file * * @return int */ public function getBlockOffset($blockId) { return 512 + $blockId * $this->bigBlockSize; } /** * Returns a stream for use with fread() etc. External callers should * use \PhpOffice\PhpSpreadsheet\Shared\OLE\PPS\File::getStream(). * * @param int|OLE\PPS $blockIdOrPps block id or PPS * * @return resource read-only stream */ public function getStream($blockIdOrPps) { static $isRegistered = false; if (!$isRegistered) { stream_wrapper_register('ole-chainedblockstream', ChainedBlockStream::class); $isRegistered = true; } // Store current instance in global array, so that it can be accessed // in OLE_ChainedBlockStream::stream_open(). // Object is removed from self::$instances in OLE_Stream::close(). $GLOBALS['_OLE_INSTANCES'][] = $this; $keys = array_keys($GLOBALS['_OLE_INSTANCES']); $instanceId = end($keys); $path = 'ole-chainedblockstream://oleInstanceId=' . $instanceId; if ($blockIdOrPps instanceof OLE\PPS) { $path .= '&blockId=' . $blockIdOrPps->startBlock; $path .= '&size=' . $blockIdOrPps->Size; } else { $path .= '&blockId=' . $blockIdOrPps; } $resource = fopen($path, 'rb'); if ($resource === false) { throw new Exception("Unable to open stream $path"); } return $resource; } /** * Reads a signed char. * * @param resource $fileHandle file handle * * @return int */ private static function readInt1($fileHandle) { [, $tmp] = unpack('c', fread($fileHandle, 1) ?: '') ?: [0, 0]; return $tmp; } /** * Reads an unsigned short (2 octets). * * @param resource $fileHandle file handle * * @return int */ private static function readInt2($fileHandle) { [, $tmp] = unpack('v', fread($fileHandle, 2) ?: '') ?: [0, 0]; return $tmp; } private const SIGNED_4OCTET_LIMIT = 2147483648; private const SIGNED_4OCTET_SUBTRACT = 2 * self::SIGNED_4OCTET_LIMIT; /** * Reads long (4 octets), interpreted as if signed on 32-bit system. * * @param resource $fileHandle file handle * * @return int */ private static function readInt4($fileHandle) { [, $tmp] = unpack('V', fread($fileHandle, 4) ?: '') ?: [0, 0]; if ($tmp >= self::SIGNED_4OCTET_LIMIT) { $tmp -= self::SIGNED_4OCTET_SUBTRACT; } return $tmp; } /** * Gets information about all PPS's on the OLE container from the PPS WK's * creates an OLE_PPS object for each one. * * @param int $blockId the block id of the first block * * @return bool true on success, PEAR_Error on failure */ public function readPpsWks($blockId) { $fh = $this->getStream($blockId); for ($pos = 0; true; $pos += 128) { fseek($fh, $pos, SEEK_SET); $nameUtf16 = (string) fread($fh, 64); $nameLength = self::readInt2($fh); $nameUtf16 = substr($nameUtf16, 0, $nameLength - 2); // Simple conversion from UTF-16LE to ISO-8859-1 $name = str_replace("\x00", '', $nameUtf16); $type = self::readInt1($fh); switch ($type) { case self::OLE_PPS_TYPE_ROOT: $pps = new OLE\PPS\Root(null, null, []); $this->root = $pps; break; case self::OLE_PPS_TYPE_DIR: $pps = new OLE\PPS(null, null, null, null, null, null, null, null, null, []); break; case self::OLE_PPS_TYPE_FILE: $pps = new OLE\PPS\File($name); break; default: throw new Exception('Unsupported PPS type'); } fseek($fh, 1, SEEK_CUR); $pps->Type = $type; $pps->Name = $name; $pps->PrevPps = self::readInt4($fh); $pps->NextPps = self::readInt4($fh); $pps->DirPps = self::readInt4($fh); fseek($fh, 20, SEEK_CUR); $pps->Time1st = self::OLE2LocalDate((string) fread($fh, 8)); $pps->Time2nd = self::OLE2LocalDate((string) fread($fh, 8)); $pps->startBlock = self::readInt4($fh); $pps->Size = self::readInt4($fh); $pps->No = count($this->_list); $this->_list[] = $pps; // check if the PPS tree (starting from root) is complete if (isset($this->root) && $this->ppsTreeComplete($this->root->No)) { //* @phpstan-ignore-line break; } } fclose($fh); // Initialize $pps->children on directories foreach ($this->_list as $pps) { if ($pps->Type == self::OLE_PPS_TYPE_DIR || $pps->Type == self::OLE_PPS_TYPE_ROOT) { $nos = [$pps->DirPps]; $pps->children = []; while (!empty($nos)) { $no = array_pop($nos); if ($no != -1) { $childPps = $this->_list[$no]; $nos[] = $childPps->PrevPps; $nos[] = $childPps->NextPps; $pps->children[] = $childPps; } } } } return true; } /** * It checks whether the PPS tree is complete (all PPS's read) * starting with the given PPS (not necessarily root). * * @param int $index The index of the PPS from which we are checking * * @return bool Whether the PPS tree for the given PPS is complete */ private function ppsTreeComplete($index) { return isset($this->_list[$index]) && ($pps = $this->_list[$index]) && ($pps->PrevPps == -1 || $this->ppsTreeComplete($pps->PrevPps)) && ($pps->NextPps == -1 || $this->ppsTreeComplete($pps->NextPps)) && ($pps->DirPps == -1 || $this->ppsTreeComplete($pps->DirPps)); } /** * Checks whether a PPS is a File PPS or not. * If there is no PPS for the index given, it will return false. * * @param int $index The index for the PPS * * @return bool true if it's a File PPS, false otherwise */ public function isFile($index) { if (isset($this->_list[$index])) { return $this->_list[$index]->Type == self::OLE_PPS_TYPE_FILE; } return false; } /** * Checks whether a PPS is a Root PPS or not. * If there is no PPS for the index given, it will return false. * * @param int $index the index for the PPS * * @return bool true if it's a Root PPS, false otherwise */ public function isRoot($index) { if (isset($this->_list[$index])) { return $this->_list[$index]->Type == self::OLE_PPS_TYPE_ROOT; } return false; } /** * Gives the total number of PPS's found in the OLE container. * * @return int The total number of PPS's found in the OLE container */ public function ppsTotal() { return count($this->_list); } /** * Gets data from a PPS * If there is no PPS for the index given, it will return an empty string. * * @param int $index The index for the PPS * @param int $position The position from which to start reading * (relative to the PPS) * @param int $length The amount of bytes to read (at most) * * @return string The binary string containing the data requested * * @see OLE_PPS_File::getStream() */ public function getData($index, $position, $length) { // if position is not valid return empty string if (!isset($this->_list[$index]) || ($position >= $this->_list[$index]->Size) || ($position < 0)) { return ''; } $fh = $this->getStream($this->_list[$index]); $data = (string) stream_get_contents($fh, $length, $position); fclose($fh); return $data; } /** * Gets the data length from a PPS * If there is no PPS for the index given, it will return 0. * * @param int $index The index for the PPS * * @return int The amount of bytes in data the PPS has */ public function getDataLength($index) { if (isset($this->_list[$index])) { return $this->_list[$index]->Size; } return 0; } /** * Utility function to transform ASCII text to Unicode. * * @param string $ascii The ASCII string to transform * * @return string The string in Unicode */ public static function ascToUcs($ascii) { $rawname = ''; $iMax = strlen($ascii); for ($i = 0; $i < $iMax; ++$i) { $rawname .= $ascii[$i] . "\x00"; } return $rawname; } /** * Utility function * Returns a string for the OLE container with the date given. * * @param float|int $date A timestamp * * @return string The string for the OLE container */ public static function localDateToOLE($date) { if (!$date) { return "\x00\x00\x00\x00\x00\x00\x00\x00"; } $dateTime = Date::dateTimeFromTimestamp("$date"); // days from 1-1-1601 until the beggining of UNIX era $days = 134774; // calculate seconds $big_date = $days * 24 * 3600 + (float) $dateTime->format('U'); // multiply just to make MS happy $big_date *= 10000000; // Make HEX string $res = ''; $factor = 2 ** 56; while ($factor >= 1) { $hex = (int) floor($big_date / $factor); $res = pack('c', $hex) . $res; $big_date = fmod($big_date, $factor); $factor /= 256; } return $res; } /** * Returns a timestamp from an OLE container's date. * * @param string $oleTimestamp A binary string with the encoded date * * @return float|int The Unix timestamp corresponding to the string */ public static function OLE2LocalDate($oleTimestamp) { if (strlen($oleTimestamp) != 8) { throw new ReaderException('Expecting 8 byte string'); } // 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]; // translate to seconds since 1601: $timestampHigh /= 10000000; $timestampLow /= 10000000; // days from 1601 to 1970: $days = 134774; // translate to seconds since 1970: $unixTimestamp = floor(65536.0 * 65536.0 * $timestampHigh + $timestampLow - $days * 24 * 3600 + 0.5); return IntOrFloat::evaluate($unixTimestamp); } }