MAX3
#define NCOL1_WIDTH (int)MAX3(BLOCK_WIDTH, NFILES_WIDTH, FSTYPE_WIDTH)
#define NCOL2_WIDTH (int)MAX3(BLOCK_WIDTH, FSID_WIDTH, FLAG_WIDTH) + 2
#define NCOL3_WIDTH (int)MAX3(BSIZE_WIDTH, BLOCK_WIDTH, NAMELEN_WIDTH)
#define SCOL1_WIDTH (int)MAX3(total_blocks_len, free_files_len, fstype_len)
#define SCOL2_WIDTH (int)MAX3(free_blocks_len, fsys_id_len, flag_len)
#define SCOL3_WIDTH (int)MAX3(block_size_len, available_len, fname_len)