C++ (Cpp) GFilename::is_empty示例

示例#1

/***********************************************************************//**
 * @brief Load COMPTEL response.
 *
 * @param[in] rspname COMPTEL response name.
 *
 * Loads the COMPTEL response with specified name @p rspname. The method first
 * searchs for an appropriate response in the calibration database. If no
 * appropriate response is found, the method takes the database root path
 * and response name to build the full path to the response file, and tries
 * to load the response from these paths.
 ***************************************************************************/
void GCOMResponse::load(const std::string& rspname)
{
    // Clear instance but conserve calibration database
    GCaldb caldb = m_caldb;
    clear();
    m_caldb = caldb;

    // Save response name
    m_rspname = rspname;

    // First attempt reading the response using the GCaldb interface
    GFilename filename = m_caldb.filename("","","IAQ","","",rspname);

    // If filename is empty then build filename from CALDB root path and
    // response name
    if (filename.is_empty()) {
        filename = gammalib::filepath(m_caldb.rootdir(), rspname);
        if (!filename.exists()) {
            GFilename testname = filename + ".fits";
            if (testname.exists()) {
                filename = testname;
            }
        }
    }

    // Open FITS file
    GFits fits(filename);

    // Get IAQ image
    const GFitsImage& iaq = *fits.image(0);

    // Read IAQ
    read(iaq);

    // Close ARF FITS file
    fits.close();

    // Return
    return;
}