fcsId 197 lib/zstd/decompress.c U32 const fcsId = fhd >> 6; fcsId 198 lib/zstd/decompress.c return ZSTD_frameHeaderSize_prefix + !singleSegment + ZSTD_did_fieldSize[dictID] + ZSTD_fcs_fieldSize[fcsId] + (singleSegment && !fcsId);