OpenSim::Array< T > Class Template Reference

#include <Array.h>

Public Member Functions
virtual	~Array ()
	Destructor.
	Array (const T &aDefaultValue=T(), int aSize=0, int aCapacity=Array_CAPMIN)
	Default constructor.
	Array (const Array< T > &aArray)
	Coppy constructor.
bool	arrayEquals (const Array< T > &aArray) const
T &	operator[] (int aIndex) const
	Get the array element at a specified index.
Array< T > &	operator= (const Array< T > &aArray)
	Assign this array to a specified array.
bool	operator== (const Array< T > &aArray) const
	Determine if two arrays are equal.
bool	computeNewCapacity (int aMinCapacity, int &rNewCapacity)
	Compute a new capacity that is at least as large as a specified minimum capacity; this method does not change the capacity, it simply computes a new recommended capacity.
bool	ensureCapacity (int aCapacity)
	Ensure that the capacity of this array is at least the specified amount.
void	trim ()
	Trim the capacity of this array so that it is one larger than the size of this array.
int	getCapacity () const
	Get the capacity of this storage instance.
void	setCapacityIncrement (int aIncrement)
	Set the amount by which the capacity is increased when the capacity of of the array in exceeded.
int	getCapacityIncrement () const
	Get the amount by which the capacity is increased.
bool	setSize (int aSize)
	Set the size of the array.
int	getSize () const
	Get the size of the array.
int	append (const T &aValue)
	Append a value onto the array.
int	append (const Array< T > &aArray)
	Append an array of values.
int	append (int aSize, const T *aArray)
	Append an array of values.
int	insert (int aIndex, const T &aValue)
	Insert a value into the array at a specified index.
int	remove (int aIndex)
	Remove a value from the array at a specified index.
void	set (int aIndex, const T &aValue)
	Set the value at a specified index.
T *	get ()
	Get a pointer to the low-level array.
const T *	get () const
	Get a pointer to the low-level array.
T &	get (int aIndex) const
	Get the value at a specified array index.
T &	getLast () const
	Get the last value in the array.
int	findIndex (const T &aValue) const
	Linear search for an element matching a given value.
int	rfindIndex (const T &aValue) const
	Linear search in reverse for an element matching a given value.
int	searchBinary (const T &aValue, bool aFindFirst=false, int aLo=-1, int aHi=-1) const
	Search for the largest value in the array that is less than or equal to a specified value.
Protected Attributes
int	_size
	Size of the array.
int	_capacity
	Current capacity of the array.
int	_capacityIncrement
	Increment by which the current capacity is increased when the capacity of this storage instance is reached.
T	_defaultValue
	Default value of elements.
T *	_array
	Array of values.
Friends
std::ostream &	operator<< (std::ostream &aOut, const Array< T > &aArray)
	Implementation of the output operator.

template<class T>
class OpenSim::Array< T >

Constructor & Destructor Documentation

template<class T>

virtual OpenSim::Array< T >::~Array ( ) [inline, virtual]

Destructor.

When the array is deleted, references to elements of this array become invalid.

template<class T>

OpenSim::Array< T >::Array	(	const T &	aDefaultValue = `T()`,
		int	aSize = `0`,
		int	aCapacity = `Array_CAPMIN`
	)			`[inline]`

Default constructor.

Parameters:

	aDefaultValue	Default value of an array element. This value is used to initialize array elements as the size of the array is changed.
	aSize	Initial size of the array. The array elements are initialized to aDefaultValue.
	aCapacity	Initial capacity of the array. The initial capacity is guarranteed to be at least as large as aSize + 1.

template<class T>

OpenSim::Array< T >::Array ( const Array< T > & aArray ) [inline]

Coppy constructor.

Parameters:

aArray

Array to be copied.

Member Function Documentation

template<class T>

int OpenSim::Array< T >::append	(	int	aSize,
		const T *	aArray
	)			`[inline]`

Append an array of values.

Parameters:

	aSize	Size of the array to append.
	aArray	Array of values to append.

Returns:: New size of the array, or, equvalently, the index to the new first empty element of the array.

template<class T>

int OpenSim::Array< T >::append ( const Array< T > & aArray ) [inline]

Append an array of values.

Parameters:

aArray

Array of values to append.

Returns:: New size of the array, or, equvalently, the index to the new first empty element of the array.

template<class T>

int OpenSim::Array< T >::append ( const T & aValue ) [inline]

Append a value onto the array.

Parameters:

aValue

Value to be appended.

Returns:: New size of the array, or, equvalently, the index to the new first empty element of the array.

template<class T>

bool OpenSim::Array< T >::arrayEquals ( const Array< T > & aArray ) const [inline]

template<class T>

bool OpenSim::Array< T >::computeNewCapacity	(	int	aMinCapacity,
		int &	rNewCapacity
	)			`[inline]`

Compute a new capacity that is at least as large as a specified minimum capacity; this method does not change the capacity, it simply computes a new recommended capacity.

If the capacity increment is negative, the current capacity is doubled until the computed capacity is greater than or equal to the specified minimum capacity. If the capacity increment is positive, the current capacity increment by this amount until the computed capacity is greater than or equal to the specified minimum capacity. If the capacity increment is zero, the computed capacity is set to the current capacity and false is returned.

Parameters:

	rNewCapacity	New computed capacity.
	aMinCapacity	Minimum new computed capacity. The computed capacity is incremented until it is at least as large as aMinCapacity, assuming the capacity increment is not zero.

Returns:: True if the new capacity was increased, false otherwise (i.e., if the capacity increment is set to 0).

See also:: setCapacityIncrement()

template<class T>

bool OpenSim::Array< T >::ensureCapacity ( int aCapacity ) [inline]

Ensure that the capacity of this array is at least the specified amount.

Note that the newly allocated array elements are not initialized.

Parameters:

aCapacity

Desired capacity.

Returns:: true if the capacity was successfully obtained, false otherwise.

template<class T>

int OpenSim::Array< T >::findIndex ( const T & aValue ) const [inline]

Linear search for an element matching a given value.

Parameters:

aValue

Value to which the array elements are compared.

Returns:: Index of the array element matching aValue. If there is more than one such elements with the same value the index of the first of these elements is returned. If no match is found, -1 is returned.

template<class T>

T& OpenSim::Array< T >::get ( int aIndex ) const [inline]

Get the value at a specified array index.

If the index is negative or passed the end of the array, an exception is thrown.

For faster execution, the array elements can be accessed through the overloaded operator[], which does no bounds checking.

Parameters:

aIndex

Index of the desired array element.

Returns:: Reference to the array element.

Exceptions:

Exception

if (aIndex<0)||(aIndex>=_size).

See also:: operator[].

template<class T>

const T* OpenSim::Array< T >::get ( ) const [inline]

Get a pointer to the low-level array.

Returns:: Pointer to the low-level array.

template<class T>

T* OpenSim::Array< T >::get ( ) [inline]

Get a pointer to the low-level array.

Returns:: Pointer to the low-level array.

template<class T>

int OpenSim::Array< T >::getCapacity ( ) const [inline]

Get the capacity of this storage instance.

template<class T>

int OpenSim::Array< T >::getCapacityIncrement ( ) const [inline]

Get the amount by which the capacity is increased.

template<class T>

T& OpenSim::Array< T >::getLast ( ) const [inline]

Get the last value in the array.

Returns:: Last value in the array.

Exceptions:

Exception

if the array is empty.

template<class T>

int OpenSim::Array< T >::getSize ( ) const [inline]

Get the size of the array.

Returns:: Size of the array.

template<class T>

int OpenSim::Array< T >::insert	(	int	aIndex,
		const T &	aValue
	)			`[inline]`

Insert a value into the array at a specified index.

This method is relatively computationally costly since many of the array elements may need to be shifted.

Parameters:

	aValue	Value to be inserted.
	aIndex	Index at which to insert the new value. All current elements from aIndex to the end of the array are shifted one place in the direction of the end of the array. If the specified index is greater than the current size of the array, the size of the array is increased to aIndex+1 and the itervening new elements are initialized to the default value that was specified at the time of construction.

Returns:: Size of the array after the insertion.

template<class T>

Array<T>& OpenSim::Array< T >::operator= ( const Array< T > & aArray ) [inline]

Assign this array to a specified array.

This operator makes a complete copy of the specified array; all member variables are copied. So, the result is two identical, independent arrays.

Parameters:

aArray

Array to be copied.

Returns:: Reference to this array.

template<class T>

bool OpenSim::Array< T >::operator== ( const Array< T > & aArray ) const [inline]

Determine if two arrays are equal.

Two arrays are equal if their contents are equal. That is, each array must be the same length and their corresponding array elements must be equal.

Parameters:

aArray

Array to be tested as equal.

Returns:: True if equal, false if not equal.

template<class T>

T& OpenSim::Array< T >::operator[] ( int aIndex ) const [inline]

Get the array element at a specified index.

This overloaded operator can be used both to set and get element values:
<T> array(2);
value = array[i];
[i] = value;

This operator is intended for accessing array elements with as little overhead as possible, so no error checking is performed. The caller must make sure the specified index is within the bounds of the array. If error checking is desired, use Array::get().

Parameters:

aIndex

Index of the desired element (0 <= aIndex < _size).

Returns:: Reference to the array element.

See also:: get().

template<class T>

int OpenSim::Array< T >::remove ( int aIndex ) [inline]

Remove a value from the array at a specified index.

This method is relatively computationally costly since many of the array elements may need to be shifted.

Parameters:

aIndex

Index of the value to remove. All elements from aIndex to the end of the array are shifted one place toward the beginning of the array. If aIndex is less than 0 or greater than or equal to the current size of the array, no element is removed.

Returns:: Size of the array after the removal.

template<class T>

int OpenSim::Array< T >::rfindIndex ( const T & aValue ) const [inline]

Linear search in reverse for an element matching a given value.

Parameters:

aValue

Value to which the array elements are compared.

Returns:: Index of the array element matching aValue. If there is more than one such elements with the same value the index of the last of these elements is returned. If no match is found, -1 is returned.

template<class T>

int OpenSim::Array< T >::searchBinary	(	const T &	aValue,
		bool	aFindFirst = `false`,
		int	aLo = `-1`,
		int	aHi = `-1`
	)			const `[inline]`

Search for the largest value in the array that is less than or equal to a specified value.

If there is more than one element with this largest value, the index of the first of these elements can optionally be found, but this can be up to twice as costly.

This method assumes that the array element values monotonically increase as the array index increases. Note that monotonically increase means never decrease, so it is permissible for elements to

A binary search is performed (i.e., the array is repeatedly subdivided into two bins one of which must contain the specified until the approprite element is identified), so the performance of this method is approximately ln(n), where n is the size of the array.

Parameters:

	aValue	Value to which the array elements are compared.
	aFindFirst	If true, find the first element that satisfies the search. If false, the index of any element that satisfies the search can be returned- which index will be returned depends on the length of the array and is therefore somewhat arbitrary. By default, this flag is false.
	aLo	Lowest array index to consider in the search.
	aHi	Highest array index to consider in the search.

Returns:: Index of the array element that has the largest value that is less than or equal to aValue. If there is more than one such elements with the same value and aFindFirst is set to true, the index of the first of these elements is returned. If an error is encountered (e.g., the array is empty), or the array contains no element that is less than or equal to aValue, -1 is returned.

template<class T>

void OpenSim::Array< T >::set	(	int	aIndex,
		const T &	aValue
	)			`[inline]`

Set the value at a specified index.

Parameters:

	aIndex	Index of the array element to be set. It is permissible for aIndex to be past the current end of the array- the capacity will be increased if necessary. Values between the current end of the array and aIndex are not initialized.
	aValue	Value.

template<class T>

void OpenSim::Array< T >::setCapacityIncrement ( int aIncrement ) [inline]

Set the amount by which the capacity is increased when the capacity of of the array in exceeded.

If the specified increment is negative, the capacity is set to double whenever the capacity is exceeded.

Parameters:

aIncrement

Desired capacity increment.

template<class T>

bool OpenSim::Array< T >::setSize ( int aSize ) [inline]

Set the size of the array.

This method can be used to either increase or decrease the size of the array. If this size of the array is increased, the new elements are initialized to the default value that was specified at the time of construction.

Note that the size of an array is different than its capacity. The size indicates how many valid elements are stored in an array. The capacity indicates how much the size of the array can be increased without allocated more memory. At all times size <= capacity.

Parameters:

aSize

Desired size of the array. The size must be greater than or equal to zero.

template<class T>

void OpenSim::Array< T >::trim ( ) [inline]

Trim the capacity of this array so that it is one larger than the size of this array.

This is useful for reducing the amount of memory used by this array. This capacity is kept at one larger than the size so that, for example, an array of characters can be treated as a NULL terminated string.

Friends And Related Function Documentation

template<class T>

std::ostream& operator<<	(	std::ostream &	aOut,
		const Array< T > &	aArray
	)			`[friend]`

Implementation of the output operator.

The output for an array looks like the following:

Array[size] = T[0] T[1] T[2] ... T[size-1].

Parameters:

	aOut	Output stream.
	aArray	Array to be output.

Returns:: Reference to the output stream.

Member Data Documentation

template<class T>

T* OpenSim::Array< T >::_array [protected]

Array of values.

template<class T>

int OpenSim::Array< T >::_capacity [protected]

Current capacity of the array.

template<class T>

int OpenSim::Array< T >::_capacityIncrement [protected]

Increment by which the current capacity is increased when the capacity of this storage instance is reached.

If negative, capacity doubles.

template<class T>

T OpenSim::Array< T >::_defaultValue [protected]

Default value of elements.

template<class T>

int OpenSim::Array< T >::_size [protected]

Size of the array.

Also the index of the first empty array element.

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

OpenSim/Common/Array.h

OpenSim::Array< T > Class Template Reference

Public Member Functions

Protected Attributes

Friends

template<class T> class OpenSim::Array< T >

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation

template<class T>
class OpenSim::Array< T >