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Data Structures and Constants

Modifiers are specified as bits in a 32-bit word. The low-order 16 bits are reserved for modifiers applicable to both names and properties. The next 8 bits are reserved by the name space and are redefined for each name space. The high-order 8 bits are reserved for each name and property set and are redefined for each name entry.

The following types are used to declare modifier words:



 
typedef unsigned long   RegModifiers;



 
typedef RegModifiers    RegEntryModifiers;



 
typedef RegModifiers    RegPropertyModifiers;

The following constants are used to mask bits in modifier words:

Name	Value	Description
`kRegNoModifiers`	0x00000000	No entry modifiers in place
`kRegUniversalModifierMask`	0x0000FFFF	Modifiers to all entries
`kRegNameSpaceModifierMask`	0x00FF0000	Modifiers to all entries within the name space
`kRegModifierMask`	0xFF000000	Modifiers to just this entry

The following constants have meaning for property modifiers:

Name	Value	Description
`kRegPropertyValueIsSavedToNVRAM`	0x00000001	Saved in NVRAM
`kRegPropertyValueIsSavedToDisk`	0x00000002	Saved to disk