/**
* Writes a variable to an actual file on the FS
* If the variable was already loaded from a file, it will be used and overwritten,
* except if a specific directory and name are provided.
*
* @param string $directory Directory to save the file to
* @param string $name Name of the file, without the extension
*
* @throws \Exception (if output file can't be written to)
*/
public function saveVarToFile($directory = '', $name = '')
{
$fullPath = '';
if ($this->isFromFile && $directory === '') {
$fullPath = $this->filePath;
$this->close();
} else {
if ($name === '') {
$name = $this->varEntry['varname'];
}
$extIndex = $this->calcModel->getOrderId();
if ($extIndex < 0) {
$extIndex = 0;
}
$fileName = str_replace("", '', $name) . '.' . $this->getType()->getExts()[$extIndex];
if ($directory === '') {
$directory = './';
}
$directory = rtrim($directory, '/');
$fullPath = realpath($directory) . '/' . $fileName;
}
$handle = fopen($fullPath, 'wb');
if (!$handle) {
throw new \RuntimeException('Could not open destination file: ' . $fullPath);
}
$this->refreshMetadataFields();
$bin_data = '';
foreach ([$this->header, $this->varEntry] as $whichData) {
foreach ($whichData as $key => $data) {
// fields not used for this calc version, for instance.
if ($data === null) {
continue;
}
switch (gettype($data)) {
case 'integer':
// The length fields are the only ones on 2 bytes.
if ($key === 'entries_len' || $key === 'data_length' || $key === 'data_length2') {
$bin_data .= chr($data & 0xff) . chr($data >> 8 & 0xff);
} else {
$bin_data .= chr($data & 0xff);
}
break;
case 'string':
$bin_data .= $data;
break;
case 'array':
foreach ($data as $subData) {
$bin_data .= chr($subData & 0xff);
}
break;
}
}
}
fwrite($handle, $bin_data);
fwrite($handle, chr($this->computedChecksum & 0xff) . chr($this->computedChecksum >> 8 & 0xff));
fclose($handle);
$this->corrupt = false;
}
private function makeVarEntryFromFile()
{
$calcFlags = $this->calcModel->getFlags();
$dataSectionOffset = 8 + 3 + 42 + 2;
// after header
fseek($this->file, $dataSectionOffset);
$this->varEntry = [];
$this->varEntry['constBytes'] = $this->get_raw_bytes(2);
$this->varEntry['data_length'] = $this->get_raw_bytes(1)[0] + ($this->get_raw_bytes(1)[0] << 8);
$this->varEntry['typeID'] = $this->get_raw_bytes(1)[0];
$this->varEntry['varname'] = $this->get_string_bytes(8);
$this->varEntry['version'] = $calcFlags >= TIFeatureFlags::hasFlash ? $this->get_raw_bytes(1)[0] : null;
$this->varEntry['archivedFlag'] = $calcFlags >= TIFeatureFlags::hasFlash ? $this->get_raw_bytes(1)[0] : null;
$this->varEntry['data_length2'] = $this->get_raw_bytes(1)[0] + ($this->get_raw_bytes(1)[0] << 8);
$this->varEntry['data'] = $this->get_raw_bytes($this->varEntry['data_length']);
}