REG

pub const REG = struct {
    pub const ValueType = enum(ULONG) {
        /// No value type
        NONE = 0,
        /// Unicode nul terminated string
        SZ = 1,
        /// Unicode nul terminated string (with environment variable references)
        EXPAND_SZ = 2,
        /// Free form binary
        BINARY = 3,
        /// 32-bit number
        DWORD = 4,
        /// 32-bit number
        DWORD_BIG_ENDIAN = 5,
        /// Symbolic Link (unicode)
        LINK = 6,
        /// Multiple Unicode strings
        MULTI_SZ = 7,
        /// Resource list in the resource map
        RESOURCE_LIST = 8,
        /// Resource list in the hardware description
        FULL_RESOURCE_DESCRIPTOR = 9,
        RESOURCE_REQUIREMENTS_LIST = 10,
        /// 64-bit number
        QWORD = 11,
        _,

        /// 32-bit number (same as REG_DWORD)
        pub const DWORD_LITTLE_ENDIAN: ValueType = .DWORD;
        /// 64-bit number (same as REG_QWORD)
        pub const QWORD_LITTLE_ENDIAN: ValueType = .QWORD;
    };

    /// Used with NtOpenKeyEx, maybe others
    pub const OpenOptions = packed struct(ULONG) {
        Reserved0: u2 = 0,
        /// Open for backup or restore
        /// special access rules privilege required
        BACKUP_RESTORE: bool = false,
        /// Open symbolic link
        OPEN_LINK: bool = false,
        Reserved3: u28 = 0,
    };

    /// Used with NtLoadKeyEx, maybe others
    pub const LoadOptions = packed struct(ULONG) {
        /// Restore whole hive volatile
        WHOLE_HIVE_VOLATILE: bool = false,
        /// Unwind changes to last flush
        REFRESH_HIVE: bool = false,
        /// Never lazy flush this hive
        NO_LAZY_FLUSH: bool = false,
        /// Force the restore process even when we have open handles on subkeys
        FORCE_RESTORE: bool = false,
        /// Loads the hive visible to the calling process
        APP_HIVE: bool = false,
        /// Hive cannot be mounted by any other process while in use
        PROCESS_PRIVATE: bool = false,
        /// Starts Hive Journal
        START_JOURNAL: bool = false,
        /// Grow hive file in exact 4k increments
        HIVE_EXACT_FILE_GROWTH: bool = false,
        /// No RM is started for this hive (no transactions)
        HIVE_NO_RM: bool = false,
        /// Legacy single logging is used for this hive
        HIVE_SINGLE_LOG: bool = false,
        /// This hive might be used by the OS loader
        BOOT_HIVE: bool = false,
        /// Load the hive and return a handle to its root kcb
        LOAD_HIVE_OPEN_HANDLE: bool = false,
        /// Flush changes to primary hive file size as part of all flushes
        FLUSH_HIVE_FILE_GROWTH: bool = false,
        /// Open a hive's files in read-only mode
        /// The same flag is used for REG_APP_HIVE_OPEN_READ_ONLY:
        /// Open an app hive's files in read-only mode (if the hive was not previously loaded).
        OPEN_READ_ONLY: bool = false,
        /// Load the hive, but don't allow any modification of it
        IMMUTABLE: bool = false,
        /// Do not fall back to impersonating the caller if hive file access fails
        NO_IMPERSONATION_FALLBACK: bool = false,
        Reserved16: u16 = 0,
    };
}