DataNode

An object used internally by the Milo engine to represent a value of some type. Arrays of DataNodes are called DataArrays. In a DTB file, the type is explicitly stored, but in DTA files, it is guessed based on the syntax and keywords.

Structure

Name	Type	Size	Function
mValue	Varies	4 bytes	The value of the DataNode.
mType	DataType	4 bytes	The type of the DataNode.

Types

Each Milo game supports a different set of types for a DataNode. The amount of types gradually increased as Milo's scripting engine became more capable over the years.

Rock Band 3

Type Name	Value	Description
kDataInteger	0x0	An integer value.
kDataFloat	0x1	A 32-bit floating point value.
kDataVar	0x2	A generic variable. Prefixed by $ in DTA.
kDataFunc	0x3	A function declaration.
kDataObject(?)	0x4	A pointer to some sort of object.
kDataSymbol	0x5	A pointer to a Symbol.
kDataUnhandled	0x6	No value.
kDataIfdef	0x7	A conditional checking for the existence of a global macro (such as _SHIP).
kDataElse	0x8	The 'else' conditional.
kDataEndif	0x9	The 'endif' conditional.
kDataArray	0x10	A pointer to a DataArray. Denoted by () in DTA.
kDataCommand	0x11	Executable statements/DataFunc calls. Denoted by {} in DTA.
kDataString	0x12	A string value. Usually delimited by single or double quotes in DTA.
kDataProperty	0x13	A pointer to the property of an object. Denoted by [] in DTA.
kDataGlob	0x14	Unknown.
kDataDefine	0x20	A Macro definition.
kDataInclude	0x21	A marker indicating that another DTA/DTB should be included in the current file.
kDataMerge	0x22	A marker indicating that another DTA/DTB should be merged into the current file.
kDataIfndef	0x23	A conditional checking for the non-existence of a global macro (such as _SHIP).
kDataAutorun	0x24	Unknown.
kDataUndef	0x25	Undefined value.