TFixedArray Class Reference

#include <e32std.h>

Link against: eposprvtyp.lib

class TFixedArray

Protected Attributes
T	iRep

Public Member Functions
	TFixedArray()
	TFixedArray(const T *, TInt)
TArray< T >	Array()
T &	At(TInt)
const T &	At(TInt)
T *	Begin()
const T *	Begin()
void	Copy(const T *, TInt)
TInt	Count()
void	DeleteAll()
T *	End()
const T *	End()
TInt	Length()
void	Reset()
T &	operator[](TInt)
const T &	operator[](TInt)

Protected Member Functions
const TAny *	AtFunctionR(const CBase *, TInt)
TInt	CountFunctionR(const CBase *)
TBool	InRange(TInt)

Detailed Description

A thin wrapper class for C++ arrays allowing automatic checking of index values to ensure that all accesses are legal.

The class also supports the deletion of objects.

The class is templated, based on a class type and an integer value. The class type defines the type of object contained in the array; the integer value defines the size (dimension) of the array.

A wrapper object can be:

1. embedded in objects allocated on the heap.

2. used on the program stack.

Member Attribute Documentation

iRep

[protected]

Constructor & Destructor Documentation

TFixedArray ( )

TFixedArray

(

)

[inline]

Default constructor.

Constructs an uninitialised C++ array.

TFixedArray ( const T *, TInt )

TFixedArray	(	const T *	aList,
		TInt	aLength
	)	[inline]

Constructs a C++ array initialised with the specified objects.

panic: USER 133, in a debug build only, if aLength is negative or is greater than the size of the array as defined by the integer template parameter.

Parameter	Description
aList	A pointer to a set of contiguous objects.
aLength	The number of contiguous objects to be copied. This value must not be negative and must not be greater than the size of the array as defined by the integer template parameter.

Member Function Documentation

Array ( )

TArray< T >

Array

(

)

const [inline]

Creates and returns a generic array for this C++ array.

Returns: A generic array for this C++ array.

At ( TInt )

T &

(

TInt

aIndex

)

[inline]

Gets a reference to the specified element within the C++ array.

panic: USER 133, if aIndex is negative or greater than or equal to the size of the array as defined by the integer template parameter.

Parameter	Description
aIndex	The position of the element within the array. This is an offset value; a zero value refers to the first element in the array. This value must be greater than or equal to zero and less than the size of the array.

Returns: A reference to an element of the array.

At ( TInt )

const T &

(

TInt

aIndex

)

const [inline]

Gets a const reference to the specified element within the C++ array.

panic: USER 133, in a debug build only, if aIndex is negative or greater than or equal to the size of the array as defined by the integer template parameter.

Parameter	Description
aIndex	The position of the element within the array. This is an offset value; a zero value refers to the first element in the array. This value must be greater than or equal to zero and less than the size of the array.

Returns: A const reference to an element of the array; the element cannot be changed through this reference.

AtFunctionR ( const CBase *, TInt )

const TAny *	AtFunctionR	(	const CBase *	aThis,
			TInt	aIndex
		)	[protected, static, inline]

Begin ( )

T *

Begin

(

)

[inline]

Gets a pointer to the first element of the array.

Returns: A pointer to the first element of the array.

Begin ( )

const T *

Begin

(

)

const [inline]

Gets a pointer to the first element of the array.

Returns: A pointer to a const element of the array.

Copy ( const T *, TInt )

void	Copy	(	const T *	aList,
			TInt	aLength
		)	[inline]

Copies the specified set of contiguous objects into the C++ array.

The copy operation starts at the beginning of the array, replacing any existing data.

panic: USER 133, in a debug build only, if aLength is negative or is greater than the size of the array as defined by the integer template parameter.

Parameter	Description
aList	A pointer to a set of contiguous objects.
aLength	The number of contiguous objects to be copied. This value must not be negative and must not be greater than the size of the array as defined by the integer template parameter.

Count ( )

TInt

Count

(

)

const [inline]

Gets the size of the array.

For any instance of this class, the array size is fixed and has the same value as the integer template parameter.

Returns: The size of the array.

CountFunctionR ( const CBase * )

TInt

CountFunctionR

(

const CBase *

aThis

)

[protected, static, inline]

DeleteAll ( )

void

DeleteAll

(

)

[inline]

Invokes the delete operator on every member of the array.

The function can only be used for arrays of pointers to CBase derived objects.

If the array is to be used after a call to this function, it is good practice to call TFixedArray<class T,TInt S>::Reset() to set all array elements to NULL.

End ( )

T *

End

(

)

[inline]

Gets a pointer to the first byte following the end of the array.

Returns: A pointer to the first byte following the end of the array.

End ( )

const T *

End

(

)

const [inline]

Gets a pointer to the first byte following the end of the array.

Returns: A pointer to the const first byte following the end of the array.

InRange ( TInt )

TBool

InRange

(

TInt

aIndex

)

[protected, static, inline]

Length ( )

TInt

Length

(

)

const [inline]

Gets the size of an array element, in bytes.

Returns: The size of an array element, in bytes.

Reset ( )

void

Reset

(

)

[inline]

Fills every element of the array with binary zeroes.

operator[] ( TInt )

T &

operator[]

(

TInt

aIndex

)

[inline]

Gets a reference to the specified element within the C++ array.

panic: USER 133, in a debug build only, if aIndex is negative or greater than or equal to the size of the array as defined by the integer template parameter.

Parameter	Description
aIndex	The position of the element within the array. This is an offset value; a zero value refers to the first element in the array. This value must be greater than or equal to zero and less than the size of the array.

Returns: A reference to an element of the array.

operator[] ( TInt )

const T &

operator[]

(

TInt

aIndex

)

const [inline]

Gets a const reference to the specified element within the C++ array.

panic: USER 133, in a debug build only, if aIndex is negative or greater than or equal to the size of the array as defined by the integer template parameter.

Parameter	Description
aIndex	The position of the element within the array. This is an offset value; a zero value refers to the first element in the array. This value must be greater than or equal to zero and less than the size of the array.

Returns: A const reference to an element of the array; the element cannot be changed through this reference.