diff options
Diffstat (limited to 'vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/OLE/ChainedBlockStream.php')
| -rw-r--r-- | vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/OLE/ChainedBlockStream.php | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/OLE/ChainedBlockStream.php b/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/OLE/ChainedBlockStream.php new file mode 100644 index 0000000..7b98370 --- /dev/null +++ b/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/OLE/ChainedBlockStream.php @@ -0,0 +1,196 @@ +<?php
+
+namespace PhpOffice\PhpSpreadsheet\Shared\OLE;
+
+use PhpOffice\PhpSpreadsheet\Shared\OLE;
+
+class ChainedBlockStream
+{
+ /**
+ * The OLE container of the file that is being read.
+ *
+ * @var OLE
+ */
+ public $ole;
+
+ /**
+ * Parameters specified by fopen().
+ *
+ * @var array
+ */
+ public $params;
+
+ /**
+ * The binary data of the file.
+ *
+ * @var string
+ */
+ public $data;
+
+ /**
+ * The file pointer.
+ *
+ * @var int byte offset
+ */
+ public $pos;
+
+ /**
+ * Implements support for fopen().
+ * For creating streams using this wrapper, use OLE_PPS_File::getStream().
+ *
+ * @param string $path resource name including scheme, e.g.
+ * ole-chainedblockstream://oleInstanceId=1
+ * @param string $mode only "r" is supported
+ * @param int $options mask of STREAM_REPORT_ERRORS and STREAM_USE_PATH
+ * @param string &$openedPath absolute path of the opened stream (out parameter)
+ *
+ * @return bool true on success
+ */
+ public function stream_open($path, $mode, $options, &$openedPath) // @codingStandardsIgnoreLine
+ {
+ if ($mode != 'r') {
+ if ($options & STREAM_REPORT_ERRORS) {
+ trigger_error('Only reading is supported', E_USER_WARNING);
+ }
+
+ return false;
+ }
+
+ // 25 is length of "ole-chainedblockstream://"
+ parse_str(substr($path, 25), $this->params);
+ if (!isset($this->params['oleInstanceId'], $this->params['blockId'], $GLOBALS['_OLE_INSTANCES'][$this->params['oleInstanceId']])) {
+ if ($options & STREAM_REPORT_ERRORS) {
+ trigger_error('OLE stream not found', E_USER_WARNING);
+ }
+
+ return false;
+ }
+ $this->ole = $GLOBALS['_OLE_INSTANCES'][$this->params['oleInstanceId']];
+
+ $blockId = $this->params['blockId'];
+ $this->data = '';
+ if (isset($this->params['size']) && $this->params['size'] < $this->ole->bigBlockThreshold && $blockId != $this->ole->root->startBlock) {
+ // Block id refers to small blocks
+ $rootPos = $this->ole->getBlockOffset($this->ole->root->startBlock);
+ while ($blockId != -2) {
+ $pos = $rootPos + $blockId * $this->ole->bigBlockSize;
+ $blockId = $this->ole->sbat[$blockId];
+ fseek($this->ole->_file_handle, $pos);
+ $this->data .= fread($this->ole->_file_handle, $this->ole->bigBlockSize);
+ }
+ } else {
+ // Block id refers to big blocks
+ while ($blockId != -2) {
+ $pos = $this->ole->getBlockOffset($blockId);
+ fseek($this->ole->_file_handle, $pos);
+ $this->data .= fread($this->ole->_file_handle, $this->ole->bigBlockSize);
+ $blockId = $this->ole->bbat[$blockId];
+ }
+ }
+ if (isset($this->params['size'])) {
+ $this->data = substr($this->data, 0, $this->params['size']);
+ }
+
+ if ($options & STREAM_USE_PATH) {
+ $openedPath = $path;
+ }
+
+ return true;
+ }
+
+ /**
+ * Implements support for fclose().
+ */
+ public function stream_close(): void // @codingStandardsIgnoreLine
+ {
+ $this->ole = null;
+ unset($GLOBALS['_OLE_INSTANCES']);
+ }
+
+ /**
+ * Implements support for fread(), fgets() etc.
+ *
+ * @param int $count maximum number of bytes to read
+ *
+ * @return string
+ */
+ public function stream_read($count) // @codingStandardsIgnoreLine
+ {
+ if ($this->stream_eof()) {
+ return false;
+ }
+ $s = substr($this->data, $this->pos, $count);
+ $this->pos += $count;
+
+ return $s;
+ }
+
+ /**
+ * Implements support for feof().
+ *
+ * @return bool TRUE if the file pointer is at EOF; otherwise FALSE
+ */
+ public function stream_eof() // @codingStandardsIgnoreLine
+ {
+ return $this->pos >= strlen($this->data);
+ }
+
+ /**
+ * Returns the position of the file pointer, i.e. its offset into the file
+ * stream. Implements support for ftell().
+ *
+ * @return int
+ */
+ public function stream_tell() // @codingStandardsIgnoreLine
+ {
+ return $this->pos;
+ }
+
+ /**
+ * Implements support for fseek().
+ *
+ * @param int $offset byte offset
+ * @param int $whence SEEK_SET, SEEK_CUR or SEEK_END
+ *
+ * @return bool
+ */
+ public function stream_seek($offset, $whence) // @codingStandardsIgnoreLine
+ {
+ if ($whence == SEEK_SET && $offset >= 0) {
+ $this->pos = $offset;
+ } elseif ($whence == SEEK_CUR && -$offset <= $this->pos) {
+ $this->pos += $offset;
+ } elseif ($whence == SEEK_END && -$offset <= count($this->data)) {
+ $this->pos = strlen($this->data) + $offset;
+ } else {
+ return false;
+ }
+
+ return true;
+ }
+
+ /**
+ * Implements support for fstat(). Currently the only supported field is
+ * "size".
+ *
+ * @return array
+ */
+ public function stream_stat() // @codingStandardsIgnoreLine
+ {
+ return [
+ 'size' => strlen($this->data),
+ ];
+ }
+
+ // Methods used by stream_wrapper_register() that are not implemented:
+ // bool stream_flush ( void )
+ // int stream_write ( string data )
+ // bool rename ( string path_from, string path_to )
+ // bool mkdir ( string path, int mode, int options )
+ // bool rmdir ( string path, int options )
+ // bool dir_opendir ( string path, int options )
+ // array url_stat ( string path, int flags )
+ // string dir_readdir ( void )
+ // bool dir_rewinddir ( void )
+ // bool dir_closedir ( void )
+}
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