This class represents a dynamic bit array. More...

#include <array.h>

Inheritance diagram for PBitArray:

Collaboration diagram for PBitArray:

Public Member Functions
Construction
	PBitArray (PINDEX initialSize=0)
	Construct a new dynamic array of bits. More...

	PBitArray (const void *buffer, PINDEX length, PBoolean dynamic=true)
	Construct a new dynamic array of elements of the specified type. More...

Overrides from class PObject
virtual PObject *	Clone () const
	Clone the object. More...

Overrides from class <code>PContainer</code>
virtual PINDEX	GetSize () const
	Get the current size of the container. More...

virtual PBoolean	SetSize (PINDEX newSize)
	Set the size of the array in bits. More...

PBoolean	SetAt (PINDEX index, PBoolean val)
	Set the specific bit in the array. More...

PBoolean	GetAt (PINDEX index) const
	Get a bit from the array. More...

void	Attach (const void *buffer, PINDEX bufferSize)
	Attach a pointer to a static block to the bit array type. More...

BYTE *	GetPointer (PINDEX minSize=0)
	Get a pointer to the internal array and assure that it is of at least the specified size. More...

New functions for class
PBoolean	operator[] (PINDEX index) const
	Get a value from the array. More...

PBitArray &	operator+= (PINDEX index)
	Set a bit to the array. More...

PBitArray &	operator-= (PINDEX index)
	Set a bit to the array. More...

PBoolean	Concatenate (const PBitArray &array)
	Concatenate one array to the end of this array. More...

Public Member Functions inherited from PBYTEArray
template<typename T >
const T &	GetAs (PINDEX offset=0)
	Function to cast block of memory in PBYTEArray to another structure. More...

	PBYTEArray (PINDEX initialSize=0)
	Construct a new dynamic array of unsigned chars. More...

	PBYTEArray (BYTE const *buffer, PINDEX length, PBoolean dynamic=true)
	Construct a new dynamic array of unsigned chars. More...

	PBYTEArray (PContainerReference &reference_)

virtual void	PrintOn (ostream &strm) const
	Print the array. More...

virtual void	ReadFrom (istream &strm)
	Read the array. More...

Public Member Functions inherited from PBaseArray< BYTE >
	PBaseArray (PINDEX initialSize=0)
	Construct a new dynamic array of elements of the specified type. More...

	PBaseArray (BYTEconst *buffer, PINDEX length, PBoolean dynamic=true)
	Construct a new dynamic array of elements of the specified type. More...

PBoolean	SetAt (PINDEX index, BYTEval)
	Set the specific element in the array. More...

BYTE	GetAt (PINDEX index) const
	Get a value from the array. More...

void	Attach (const BYTE *buffer, PINDEX bufferSize)
	Attach a pointer to a static block to the base array type. More...

BYTE *	GetPointer (PINDEX minSize=0)
	Get a pointer to the internal array and assure that it is of at least the specified size. More...

BYTE	operator[] (PINDEX index) const
	Get a value from the array. More...

BYTE &	operator[] (PINDEX index)
	Get a reference to value from the array. More...

	operator BYTEconst * () const
	Get a pointer to the internal array. More...

PBoolean	Concatenate (const PBaseArray &array)
	Concatenate one array to the end of this array. More...

Public Member Functions inherited from PAbstractArray
	PAbstractArray (PINDEX elementSizeInBytes, PINDEX initialSize=0)
	Create a new dynamic array of `initalSize` elements of `elementSizeInBytes` bytes each. More...

	PAbstractArray (PINDEX elementSizeInBytes, const void *buffer, PINDEX bufferSizeInElements, PBoolean dynamicAllocation)
	Create a new dynamic array of `bufferSizeInElements` elements of `elementSizeInBytes` bytes each. More...

virtual Comparison	Compare (const PObject &obj) const
	Get the relative rank of the two arrays. More...

void	Attach (const void *buffer, PINDEX bufferSize)
	Attach a pointer to a static block to the base array type. More...

void *	GetPointer (PINDEX minSize=1)
	Get a pointer to the internal array and assure that it is of at least the specified size. More...

PBoolean	Concatenate (const PAbstractArray &array)
	Concatenate one array to the end of this array. More...

Public Member Functions inherited from PContainer
	PContainer (PINDEX initialSize=0)
	Create a new unique container. More...

	PContainer (const PContainer &cont)
	Create a new refernce to container. More...

PContainer &	operator= (const PContainer &cont)
	Assign one container reference to another. More...

virtual	~PContainer ()
	Destroy the container class. More...

__inline size_t	size () const

PBoolean	SetMinSize (PINDEX minSize)
	Set the minimum size of container. More...

virtual PBoolean	IsEmpty () const
	Determine if the container is empty. More...

__inline bool	empty () const

PBoolean	IsUnique () const
	Determine if container is unique reference. More...

virtual PBoolean	MakeUnique ()
	Make this instance to be the one and only reference to the container contents. More...

Public Member Functions inherited from PObject
unsigned	GetTraceContextIdentifier () const
	Get PTRACE context identifier. More...

void	SetTraceContextIdentifier (unsigned id)

void	GetTraceContextIdentifier (PObject &obj)

void	GetTraceContextIdentifier (PObject *obj)

void	SetTraceContextIdentifier (const PObject &obj)

void	SetTraceContextIdentifier (const PObject *obj)

virtual	~PObject ()

template<class CLS >
CLS *	CloneAs () const
	As for Clone() but converts to specified type. More...

virtual PINDEX	HashFunction () const
	This function yields a hash value required by the `PDictionary` class. More...

virtual Comparison	CompareObjectMemoryDirect (const PObject &obj) const
	Determine the byte wise comparison of two objects. More...

bool	operator== (const PObject &obj) const
	Compare the two objects. More...

bool	operator!= (const PObject &obj) const
	Compare the two objects. More...

bool	operator< (const PObject &obj) const
	Compare the two objects. More...

bool	operator> (const PObject &obj) const
	Compare the two objects. More...

bool	operator<= (const PObject &obj) const
	Compare the two objects. More...

bool	operator>= (const PObject &obj) const
	Compare the two objects. More...

virtual const char *	GetClass (unsigned ancestor=0) const
	Get the current dynamic type of the object instance. More...

PBoolean	IsClass (const char *cls) const

virtual PBoolean	InternalIsDescendant (const char *clsName) const
	Determine if the dynamic type of the current instance is a descendent of the specified class. More...

__inline const PObject *	PTraceObjectInstance () const

Additional Inherited Members
Public Types inherited from PObject
enum	Comparison { LessThan = -1, EqualTo = 0, GreaterThan = 1 }
	Result of the comparison operation performed by the `Compare()` function. More...

Static Public Member Functions inherited from PObject
static Comparison	InternalCompareObjectMemoryDirect (const PObject obj1, const PObject obj2, PINDEX size)
	Internal function caled from CompareObjectMemoryDirect() More...

static const char *	Class ()
	Get the name of the class as a C string. More...

static __inline const PObject *	PTraceObjectInstance (const char *)

static __inline const PObject *	PTraceObjectInstance (const PObject *obj)

Protected Member Functions inherited from PBaseArray< BYTE >
	PBaseArray (PContainerReference &reference_)

virtual void	PrintElementOn (ostream &stream, PINDEX index) const

Protected Attributes inherited from PAbstractArray
PINDEX	elementSize
	Size of an element in bytes. More...

char *	theArray
	Pointer to the allocated block of memory. More...

PBoolean	allocatedDynamically
	Flag indicating the array was allocated on the heap. More...

Friends inherited from PObject

Detailed Description

This class represents a dynamic bit array.

Constructor & Destructor Documentation

PBitArray::PBitArray ( PINDEX initialSize = 0 )

Construct a new dynamic array of bits.

Parameters

initialSize Initial number of bits in the array.

PBitArray::PBitArray	(	const void *	buffer,
		PINDEX	length,
		PBoolean	dynamic = `true`
	)

Construct a new dynamic array of elements of the specified type.

Parameters

buffer	Pointer to an array of the elements of type T.
length	Number of bits (not bytes!) pointed to by `buffer`.
dynamic	Buffer is copied and dynamically allocated.

Member Function Documentation

void PBitArray::Attach	(	const void *	buffer,
		PINDEX	bufferSize
	)

Attach a pointer to a static block to the bit array type.

The pointer is used directly and will not be copied to a dynamically allocated buffer. If the SetSize() function is used to change the size of the buffer, the object will be converted to a dynamic form with the contents of the static buffer copied to the allocated buffer.

Any dynamically allocated buffer will be freed.

Parameters

buffer	Pointer to an array of elements.
bufferSize	Number of bits (not bytes!) pointed to by buffer.

virtual PObject* PBitArray::Clone ( ) const

virtual

Clone the object.

Reimplemented from PBYTEArray.

PBoolean PBitArray::Concatenate ( const PBitArray & array )

Concatenate one array to the end of this array.

This function will allocate a new array large enough for the existing contents and the contents of the parameter. The paramters contents is then copied to the end of the existing array.

Note this does nothing and returns false if the target array is not dynamically allocated.

Returns: true if the memory allocation succeeded.

Parameters

array Other array to concatenate

PBoolean PBitArray::GetAt ( PINDEX index ) const

Get a bit from the array.

If index is beyond the end of the allocated array then false is returned.

Returns: Value at the array position.

Parameters

index Position on the array to get value from.

Referenced by operator[]().

BYTE* PBitArray::GetPointer ( PINDEX minSize = 0 )

Get a pointer to the internal array and assure that it is of at least the specified size.

This is useful when the array contents are being set by some external or system function eg file read.

It is unsafe to assume that the pointer is valid for very long after return from this function. The array may be resized or otherwise changed and the pointer returned invalidated. It should be used for simple calls to atomic functions, or very careful examination of the program logic must be performed.

Returns: Pointer to the array memory.

Parameters

minSize Minimum size in bits (not bytes!) for returned buffer pointer.

virtual PINDEX PBitArray::GetSize ( ) const

virtual

Get the current size of the container.

This represents the number of things the container contains. For some types of containers this will always return 1.

Returns: Number of objects in container.

Reimplemented from PContainer.

PBitArray& PBitArray::operator+= ( PINDEX index )

inline

Set a bit to the array.

This is functionally identical to the PContainer::SetAt(index, true) function.

Parameters

index Position on the array to get value from.

References SetAt().

PBitArray& PBitArray::operator-= ( PINDEX index )

inline

Set a bit to the array.

This is functionally identical to the PContainer::SetAt(index, true) function.

Parameters

index Position on the array to get value from.

References SetAt().

PBoolean PBitArray::operator[] ( PINDEX index ) const

inline

Get a value from the array.

If the index is beyond the end of the allocated array then a zero value is returned.

This is functionally identical to the PContainer::GetAt() function.

Returns: Value at the array position.

Parameters

index Position on the array to get value from.

References GetAt().

PBoolean PBitArray::SetAt	(	PINDEX	index,
		PBoolean	val
	)

Set the specific bit in the array.

The array will automatically expand, if necessary, to fit the new element in.

Returns: true if new memory for the array was successfully allocated.

Parameters

index	Position in the array to set the new value.
val	Value to set in the array.

Referenced by operator+=(), and operator-=().

virtual PBoolean PBitArray::SetSize ( PINDEX newSize )

virtual

Set the size of the array in bits.

A new array may be allocated to accomodate the new number of bits. If the array increases in size then the new bytes are initialised to zero. If the array is made smaller then the data beyond the new size is lost.

Returns: true if the memory for the array was allocated successfully.

Parameters

newSize New size of the array in bits, not bytes.

Reimplemented from PAbstractArray.

The documentation for this class was generated from the following file:

array.h

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation