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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() { $this->ole = null; unset($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) { 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() { 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() { 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, $whence) { if ($whence == SEEK_SET && $offset >= 0) { $this->pos = $offset; } elseif ($whence == SEEK_CUR && -$offset <= $this->pos) { $this->pos += $offset; } elseif ($whence == SEEK_END && -$offset <= sizeof($this->data)) { $this->pos = strlen($this->data) + $offset; } else { return false; } return true; } /** * Implements support for fstat(). Currently the only supported field is * "size". * @return array */ public function stream_stat() { return array( 'size' => strlen($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 ) }