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DynArray< T > Class Template Reference

Detailed Description

template<class T>
class shogun::DynArray< T >

Template Dynamic array class that creates an array that can be used like a list or an array.

It grows and shrinks dynamically, while elements can be accessed via index. It is performance tuned for simple types like float etc. and for hi-level objects only stores pointers, which are not automagically SG_REF'd/deleted.

Definition at line 32 of file DynArray.h.

Public Member Functions

 DynArray (int32_t p_resize_granularity=128, bool tracable=true)
 DynArray (T *p_array, int32_t p_array_size, bool p_free_array, bool p_copy_array, bool tracable=true)
 DynArray (const T *p_array, int32_t p_array_size, bool tracable=true)
virtual ~DynArray ()
int32_t set_granularity (int32_t g)
int32_t get_array_size () const
int32_t get_num_elements () const
get_element (int32_t index) const
get_last_element () const
T * get_element_ptr (int32_t index)
get_element_safe (int32_t index) const
bool set_element (T element, int32_t index)
bool insert_element (T element, int32_t index)
bool append_element (T element)
void push_back (T element)
void pop_back ()
back () const
int32_t find_element (T element) const
bool delete_element (int32_t idx)
bool resize_array (int32_t n, bool exact_resize=false)
T * get_array () const
void set_array (T *p_array, int32_t p_num_elements, int32_t p_array_size, bool p_free_array, bool p_copy_array)
void set_array (const T *p_array, int32_t p_num_elements, int32_t p_array_size)
void clear_array (T value)
void reset (T value)
void shuffle ()
void shuffle (CRandom *rand)
void set_const (const T &const_element)
operator[] (int32_t index) const
DynArray< T > & operator= (DynArray< T > &orig)
virtual const char * get_name () const

Protected Attributes

int32_t resize_granularity
T * array
int32_t num_elements
int32_t current_num_elements
bool use_sg_mallocs
bool free_array

Friends

class CDynamicArray
class CDynamicObjectArray
class CCommUlongStringKernel

Constructor & Destructor Documentation

DynArray ( int32_t  p_resize_granularity = 128,
bool  tracable = true 
)

constructor

Parameters
p_resize_granularityresize granularity
tracable

Definition at line 44 of file DynArray.h.

DynArray ( T *  p_array,
int32_t  p_array_size,
bool  p_free_array,
bool  p_copy_array,
bool  tracable = true 
)

constructor

Parameters
p_arrayanother array
p_array_sizearray's size
p_free_arrayif array must be freed
p_copy_arrayif array must be copied
tracable

Definition at line 67 of file DynArray.h.

DynArray ( const T *  p_array,
int32_t  p_array_size,
bool  tracable = true 
)

constructor

Parameters
p_arrayanother array
p_array_sizearray's size
tracable

Definition at line 83 of file DynArray.h.

virtual ~DynArray ( )
virtual

destructor

Definition at line 94 of file DynArray.h.

Member Function Documentation

bool append_element ( element)

append array element to the end of array

Parameters
elementelement to append
Returns
if setting was successful

Definition at line 244 of file DynArray.h.

T back ( ) const

STD VECTOR compatible. Return array element at the end of array.

Returns
element at the end of array

Definition at line 278 of file DynArray.h.

void clear_array ( value)

clear the array (with e.g. zeros)

Definition at line 431 of file DynArray.h.

bool delete_element ( int32_t  idx)

delete array element at idx (does not call SG_FREE() or the like)

Parameters
idxindex
Returns
if deleting was successful

Definition at line 315 of file DynArray.h.

int32_t find_element ( element) const

find first occurence of array element and return its index or -1 if not available

Parameters
elementelement to search for
Returns
index of element or -1

Definition at line 292 of file DynArray.h.

T* get_array ( ) const

get the array call get_array just before messing with it DO NOT call any [],resize/delete functions after get_array(), the pointer may become invalid !

Returns
the array

Definition at line 372 of file DynArray.h.

int32_t get_array_size ( ) const

get array size (including granularity buffer)

Returns
total array size (including granularity buffer)

Definition at line 121 of file DynArray.h.

T get_element ( int32_t  index) const

get array element at index

(does NOT do bounds checking)

Parameters
indexindex
Returns
array element at index

Definition at line 142 of file DynArray.h.

T* get_element_ptr ( int32_t  index)

get array element at index as pointer

(does NOT do bounds checking)

Parameters
indexindex
Returns
array element at index

Definition at line 163 of file DynArray.h.

T get_element_safe ( int32_t  index) const

get array element at index

(does bounds checking)

Parameters
indexindex
Returns
array element at index

Definition at line 175 of file DynArray.h.

T get_last_element ( ) const

gets last array element

Returns
array element at last index

Definition at line 151 of file DynArray.h.

virtual const char* get_name ( ) const
virtual
Returns
object name

Definition at line 511 of file DynArray.h.

int32_t get_num_elements ( ) const

get number of elements

Returns
number of elements

Definition at line 130 of file DynArray.h.

bool insert_element ( element,
int32_t  index 
)

insert array element at index

Parameters
elementelement to insert
indexindex
Returns
if setting was successful

Definition at line 223 of file DynArray.h.

DynArray<T>& operator= ( DynArray< T > &  orig)

operator overload for array assignment. Left array is resized if needed.

Parameters
origoriginal array
Returns
new array

Definition at line 488 of file DynArray.h.

T operator[] ( int32_t  index) const

operator overload for array read only access use set_element() for write access (will also make the array dynamically grow)

DOES NOT DO ANY BOUNDS CHECKING

Parameters
indexindex
Returns
element at index

Definition at line 477 of file DynArray.h.

void pop_back ( )

STD VECTOR compatible. Delete array element at the end of array.

Definition at line 265 of file DynArray.h.

void push_back ( element)

STD VECTOR compatible. Append array element to the end of array.

Parameters
elementelement to append

Definition at line 254 of file DynArray.h.

void reset ( value)

resets the array (as if it was just created), keeps granularity

Definition at line 441 of file DynArray.h.

bool resize_array ( int32_t  n,
bool  exact_resize = false 
)

resize the array

Parameters
nnew size
exact_resizeresize exactly to size n
Returns
if resizing was successful

Definition at line 340 of file DynArray.h.

void set_array ( T *  p_array,
int32_t  p_num_elements,
int32_t  p_array_size,
bool  p_free_array,
bool  p_copy_array 
)

set the array pointer and free previously allocated memory

Parameters
p_arraynew array
p_num_elementslast element index + 1
p_array_sizenumber of elements in array
p_free_arrayif array must be freed
p_copy_arrayif array must be copied

Definition at line 385 of file DynArray.h.

void set_array ( const T *  p_array,
int32_t  p_num_elements,
int32_t  p_array_size 
)

set the array pointer and free previously allocated memory

Parameters
p_arraynew array
p_num_elementslast element index + 1
p_array_sizenumber of elements in array

Definition at line 413 of file DynArray.h.

void set_const ( const T &  const_element)

set array with a constant

Definition at line 462 of file DynArray.h.

bool set_element ( element,
int32_t  index 
)

set array element at index

Parameters
elementelement to set
indexindex
Returns
if setting was successful

Definition at line 191 of file DynArray.h.

int32_t set_granularity ( int32_t  g)

set the resize granularity

Parameters
gnew granularity
Returns
what has been set (minimum is 128)

Definition at line 110 of file DynArray.h.

void shuffle ( )

randomizes the array (not thread safe!)

Definition at line 448 of file DynArray.h.

void shuffle ( CRandom rand)

randomizes the array with external random state

Definition at line 455 of file DynArray.h.

Friends And Related Function Documentation

friend class CCommUlongStringKernel
friend

Definition at line 36 of file DynArray.h.

friend class CDynamicArray
friend

Definition at line 34 of file DynArray.h.

friend class CDynamicObjectArray
friend

Definition at line 35 of file DynArray.h.

Member Data Documentation

T* array
protected

memory for dynamic array

Definition at line 518 of file DynArray.h.

int32_t current_num_elements
protected

the number of currently used elements

Definition at line 524 of file DynArray.h.

bool free_array
protected

if array must be freed

Definition at line 530 of file DynArray.h.

int32_t num_elements
protected

the number of potentially used elements in array

Definition at line 521 of file DynArray.h.

int32_t resize_granularity
protected

shrink/grow step size

Definition at line 515 of file DynArray.h.

bool use_sg_mallocs
protected

whether SG_MALLOC or just malloc etc shall be used

Definition at line 527 of file DynArray.h.


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

SHOGUN Machine Learning Toolbox - Documentation