void zfits::InitCompressionReading ( )

inlineprivate

Definition at line 84 of file zfits.h.

References ___err___, AllocateBuffers(), clear(), fCatalogInitialized, fColumnOrdering, fNumRowsPerTile, fNumTiles, fits::fTable, fits::GetInt(), gLog, fits::Table::is_compressed, fits::kCompFACT, FITS::kOrderByRow, ReadCatalog(), and fits::Table::sorted_cols.

Referenced by ReadBinaryRow().

    {
        fCatalogInitialized = true;

        if (!fTable.is_compressed)
            return;

        //The constructor may have failed
        if (!good())
            return;

        if (fTable.is_compressed)
            for (auto it=fTable.sorted_cols.cbegin(); it!= fTable.sorted_cols.cend(); it++)
            {
                if (it->comp == kCompFACT)
                    continue;

                clear(rdstate()|std::ios::badbit);
#ifdef __EXCEPTIONS
                throw std::runtime_error("Only the FACT compression scheme is handled by this reader.");
#else
                gLog << ___err___ << "ERROR - Only the FACT compression scheme is handled by this reader." << std::endl;
                return;
#endif
            }

        fColumnOrdering.resize(fTable.sorted_cols.size(), FITS::kOrderByRow);

        //Get compressed specific keywords
        fNumTiles       = fTable.is_compressed ? GetInt("NAXIS2") : 0;
        fNumRowsPerTile = fTable.is_compressed ? GetInt("ZTILELEN") : 0;

        //read the file's catalog
        ReadCatalog();

        //give it some space for uncompressing
        AllocateBuffers();
    }

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