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// ========================================================================= //

pub const HEADER_LEN: usize = 512; // length of CFB file header, in bytes
pub const DIR_ENTRY_LEN: usize = 128; // length of directory entry, in bytes
pub const NUM_DIFAT_ENTRIES_IN_HEADER: usize = 109;

// Constants for CFB file header values:
pub const MAGIC_NUMBER: [u8; 8] =
    [0xd0, 0xcf, 0x11, 0xe0, 0xa1, 0xb1, 0x1a, 0xe1];
pub const MINOR_VERSION: u16 = 0x3e;
pub const BYTE_ORDER_MARK: u16 = 0xfffe;
pub const MINI_SECTOR_SHIFT: u16 = 6; // 64-byte mini sectors
pub const MINI_SECTOR_LEN: usize = 1 << (MINI_SECTOR_SHIFT as usize);
pub const MINI_STREAM_CUTOFF: u32 = 4096;

// Constants for FAT entries:
pub const MAX_REGULAR_SECTOR: u32 = 0xfffffffa;
pub const INVALID_SECTOR: u32 = 0xfffffffb;
pub const DIFAT_SECTOR: u32 = 0xfffffffc;
pub const FAT_SECTOR: u32 = 0xfffffffd;
pub const END_OF_CHAIN: u32 = 0xfffffffe;
pub const FREE_SECTOR: u32 = 0xffffffff;

// Constants for directory entries:
pub const ROOT_DIR_NAME: &str = "Root Entry";
pub const OBJ_TYPE_UNALLOCATED: u8 = 0;
pub const OBJ_TYPE_STORAGE: u8 = 1;
pub const OBJ_TYPE_STREAM: u8 = 2;
pub const OBJ_TYPE_ROOT: u8 = 5;
pub const COLOR_RED: u8 = 0;
pub const COLOR_BLACK: u8 = 1;
pub const ROOT_STREAM_ID: u32 = 0;
pub const MAX_REGULAR_STREAM_ID: u32 = 0xfffffffa;
pub const NO_STREAM: u32 = 0xffffffff;

// ========================================================================= //