Determine whether the file is a DICOM file

The basis of judgment ： according to DICOM Prefix , The length is 4 Whether a string of bytes is equal to “DICM” To determine whether the file belongs to DICOM file

/ Determine whether the target file is DICOM file /
bool IsDicomFile(QString path)
{
// Judge whether it is dicom file
char buffer[0x85];
std::string s = path.toStdString();
std::ifstream in(path.toStdString().c_str());
in.getline(buffer, 0x85);
if (!((buffer[0x80] == 0x44) && (buffer[0x81] == 0x49) &&
(buffer[0x82] == 0x43) && (buffer[0x83] == 0x4D)))
{
std::cout << path.toStdString() << std::endl;
std::cout << “It’s not a DICOM File!” << std::endl;
return false;
}
return true;
}