Filename handling

The GFilename class handles file names in GammaLib, including extensions for FITS files in the cfitsio format. The following file name formats are supported

myfile.fits
myfile.fits[EVENTS]
myfile.fits[EVENTS,2]
myfile.fits[3,2]

The class decomposes the input string into the filename and the extension. The filename can be access using the GFilename::filename method, the extension name using the GFilename::extname() method, the extension number using the GFilename::extno() method and the extension version using the GFilename::extver() method. The latter three methods take an argument that specifies the default value that should be used in case that no extension information is specified. Below a usage example that extracts by default the EBOUNDS table from a FITS file:

C++

GFits     file;
GFilename fname(filename);
file.open(fname.filename());
const GFitsTable& table = *file.table(fname.extname("EBOUNDS"));