Package ghidra.program.model.data

Class DefaultDataType

java.lang.Object

ghidra.program.model.data.AbstractDataType

ghidra.program.model.data.DataTypeImpl

ghidra.program.model.data.DefaultDataType

All Implemented Interfaces:

DataType

public class DefaultDataType
extends DataTypeImpl

Provides an implementation of a byte that has not been defined yet as a particular type of data in the program.

Field Summary

Fields

Modifier and Type	Field	Description
static DefaultDataType	dataType	A statically defined DefaultDataType used when an Undefined byte is needed.

Fields inherited from class ghidra.program.model.data.DataTypeImpl

defaultSettings

Fields inherited from class ghidra.program.model.data.AbstractDataType

categoryPath, dataMgr, EMPTY_TYPEDEF_DEFINITIONS, name

Fields inherited from interface ghidra.program.model.data.DataType

CONFLICT_SUFFIX, DEFAULT, NO_LAST_CHANGE_TIME, NO_SOURCE_SYNC_TIME, TYPEDEF_ATTRIBUTE_PREFIX, TYPEDEF_ATTRIBUTE_SUFFIX, VOID

Method Summary

Modifier and Type	Method	Description
void	addParent(DataType dt)	Inform this data type that it has the given parent TODO: This method is reserved for internal DB use.
DataType	clone(DataTypeManager dtm)	Returns an instance of this DataType using the specified DataTypeManager to allow its use of the corresponding DataOrganization while retaining its unique identity (see DataType.getUniversalID() and archive association (see DataType.getSourceArchive()) if applicable.
DataType	copy(DataTypeManager dtm)	Returns a new instance (shallow copy) of this DataType with a new identity and no source archive association.
String	getDescription()	Get a String briefly describing this DataType.
long	getLastChangeTime()	Get the timestamp corresponding to the last time this type was changed within its datatype manager
int	getLength()	Get the length of this DataType as a number of 8-bit bytes.
String	getMnemonic(Settings settings)	Get the mnemonic for this DataType.
String	getRepresentation(MemBuffer buf, Settings settings, int length)	Get bytes from memory in a printable format for this type.
Object	getValue(MemBuffer buf, Settings settings, int length)	Get the Undefined byte as a Scalar.
Class<?>	getValueClass(Settings settings)	Get the Class of the value Object to be returned by this datatype (see DataType.getValue(MemBuffer, Settings, int)).
boolean	isEquivalent(DataType dt)	Check if the given datatype is equivalent to this datatype.
void	removeParent(DataType dt)	Remove a parent datatype

Methods inherited from class ghidra.program.model.data.DataTypeImpl

equals, getAlignedLength, getAlignment, getDefaultSettings, getLastChangeTimeInSourceArchive, getParents, getSettingsDefinitions, getSourceArchive, getUniversalID, hashCode, notifyAlignmentChanged, notifyDeleted, notifyNameChanged, notifyParents, notifyReplaced, notifySizeChanged, replaceWith, setDescription, setLastChangeTime, setLastChangeTimeInSourceArchive, setSourceArchive

Methods inherited from class ghidra.program.model.data.AbstractDataType

dataTypeAlignmentChanged, dataTypeDeleted, dataTypeNameChanged, dataTypeReplaced, dataTypeSizeChanged, dependsOn, encodeRepresentation, encodeValue, getCategoryPath, getDataOrganization, getDataOrganization, getDataTypeManager, getDataTypePath, getDefaultAbbreviatedLabelPrefix, getDefaultLabelPrefix, getDefaultLabelPrefix, getDefaultOffcutLabelPrefix, getDisplayName, getName, getPathName, getTypeDefSettingsDefinitions, hasLanguageDependantLength, isDeleted, isEncodable, isNotYetDefined, isZeroLength, setCategoryPath, setName, setNameAndCategory, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

dataType

public static DefaultDataType dataType

A statically defined DefaultDataType used when an Undefined byte is needed.

Method Details

getMnemonic

public String getMnemonic(Settings settings)

Description copied from interface: DataType

Get the mnemonic for this DataType.

Specified by:

getMnemonic in interface DataType

Overrides:

getMnemonic in class AbstractDataType

Parameters:

settings - settings which may influence the result or null

Returns:

the mnemonic for this DataType.

getLength

public int getLength()

Description copied from interface: DataType

Get the length of this DataType as a number of 8-bit bytes.

For primitive datatypes this reflects the smallest varnode which can be used to contain its value (i.e., raw data length).

Example: For x86 32-bit gcc an 80-bit long double raw data length of 10-bytes will fit within a floating point register while its aligned-length of 12-bytes is used by the gcc compiler for data/array/component allocations to maintain alignment (i.e., sizeof(long double) ).

NOTE: Other than the VoidDataType, no datatype should ever return 0, even if DataType.isZeroLength(), and only Dynamic/FactoryDataType datatypes should return -1. If DataType.isZeroLength() is true a length of 1 should be returned. Where a zero-length datatype can be handled (e.g., Composite) the DataType.isZeroLength() method should be used.

Returns:

the length of this DataType

getDescription

public String getDescription()

Description copied from interface: DataType

Get a String briefly describing this DataType.

Returns:

a one-liner describing this DataType.

getRepresentation

public String getRepresentation(MemBuffer buf,
 Settings settings,
 int length)

Description copied from interface: DataType

Get bytes from memory in a printable format for this type.

Parameters:

buf - the data.

settings - the settings to use for the representation.

length - the number of bytes to represent.

Returns:

the representation of the data in this format, never null.

getValue

public Object getValue(MemBuffer buf,
 Settings settings,
 int length)

Get the Undefined byte as a Scalar.

Parameters:

buf - the data buffer.

settings - the display settings to use.

length - the number of bytes to get the value from.

Returns:

the data Object.

getValueClass

public Class<?> getValueClass(Settings settings)

Description copied from interface: DataType

Get the Class of the value Object to be returned by this datatype (see DataType.getValue(MemBuffer, Settings, int)).

Specified by:

getValueClass in interface DataType

Overrides:

getValueClass in class DataTypeImpl

Parameters:

settings - the relevant settings to use or null for default.

Returns:

Class of the value to be returned by this datatype or null if it can vary or is unspecified. Types which correspond to a string or char array will return the String class.

clone

public DataType clone(DataTypeManager dtm)

Description copied from interface: DataType

Returns an instance of this DataType using the specified DataTypeManager to allow its use of the corresponding DataOrganization while retaining its unique identity (see DataType.getUniversalID() and archive association (see DataType.getSourceArchive()) if applicable.

This instance will be returned if this datatype's DataTypeManager matches the specified dtm. The recursion depth of a clone will stop on any datatype whose DataTypeManager matches the specified dtm and simply use the existing datatype instance.

NOTE: In general, this method should not be used to obtain an instance to be modified. In most cases changes may be made directly to this instance if supported or to a DataType.copy(DataTypeManager) of this type.

Parameters:

dtm - the data-type manager instance whose data-organization should apply.

Returns:

cloned instance which may be the same as this instance

copy

public DataType copy(DataTypeManager dtm)

Description copied from interface: DataType

Returns a new instance (shallow copy) of this DataType with a new identity and no source archive association.

Any reference to other datatypes will use DataType.clone(DataTypeManager).

Parameters:

dtm - the data-type manager instance whose data-organization should apply.

Returns:

new instanceof of this datatype

isEquivalent

public boolean isEquivalent(DataType dt)

Description copied from interface: DataType

Check if the given datatype is equivalent to this datatype.

The precise meaning of "equivalent" is datatype dependent.
NOTE: if invoked by a DB object or manager it should be invoked on the DataTypeDB object passing the other datatype as the argument.

Parameters:

dt - the datatype being tested for equivalence.

Returns:

true if the if the given datatype is equivalent to this datatype.

addParent

public void addParent(DataType dt)

Description copied from interface: DataType

Inform this data type that it has the given parent
TODO: This method is reserved for internal DB use.

Specified by:

addParent in interface DataType

Overrides:

addParent in class DataTypeImpl

Parameters:

dt - parent data type

removeParent

public void removeParent(DataType dt)

Description copied from interface: DataType

Remove a parent datatype

TODO: This method is reserved for internal DB use.

Specified by:

removeParent in interface DataType

Overrides:

removeParent in class DataTypeImpl

Parameters:

dt - parent datatype

getLastChangeTime

public long getLastChangeTime()

Description copied from interface: DataType

Get the timestamp corresponding to the last time this type was changed within its datatype manager

Specified by:

getLastChangeTime in interface DataType

Overrides:

getLastChangeTime in class DataTypeImpl

Returns:

timestamp of last change within datatype manager