Generic List object

List object. More...

Collaboration diagram for Generic List object:

Functions
GF_List *	gf_list_new ()
	list constructor More...
void	gf_list_del (GF_List *ptr)
	list destructor More...
u32	gf_list_count (const GF_List *ptr)
	get count More...
GF_Err	gf_list_add (GF_List *ptr, void *item)
	add item More...
GF_Err	gf_list_insert (GF_List *ptr, void *item, u32 position)
	inserts item More...
GF_Err	gf_list_rem (GF_List *ptr, u32 position)
	removes item More...
void *	gf_list_get (GF_List *ptr, u32 position)
	gets item More...
s32	gf_list_find (GF_List *ptr, void *item)
	finds item More...
s32	gf_list_del_item (GF_List *ptr, void *item)
	deletes item More...
void	gf_list_reset (GF_List *ptr)
	resets list More...
void *	gf_list_last (GF_List *ptr)
	gets last item More...
GF_Err	gf_list_rem_last (GF_List *ptr)
	removes last item More...
void *	gf_list_enum (GF_List *ptr, u32 *pos)
	list enumerator More...
GF_Err	gf_list_swap (GF_List *l1, GF_List *l2)
	list swap More...
GF_Err	gf_list_transfer (GF_List *dst, GF_List *src)
	list transfer More...
GF_List *	gf_list_clone (GF_List *ptr)
	clone list More...
void *	gf_list_pop_front (GF_List *ptr)
	Pop the first element in the list. More...
void *	gf_list_pop_back (GF_List *ptr)
	Pop the last element in the list. More...

Detailed Description

This section documents the list object of the GPAC framework.

Function Documentation

gf_list_new()

GF_List* gf_list_new

(

)

Constructs a new list object

Returns

new list object

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gf_list_del()

void gf_list_del

(

GF_List *

ptr

)

Destructs a list object

Parameters

ptr	list object to destruct

Note

It is the caller responsibility to destroy the content of the list if needed

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gf_list_count()

u32 gf_list_count

(

const GF_List *

ptr

)

Returns number of items in the list

Parameters

ptr	target list object

Returns

number of items in the list

gf_list_add()

GF_Err gf_list_add	(	GF_List *	ptr,
		void *	item
	)

Adds an item at the end of the list

Parameters

ptr	target list object
item	item to add

Returns

error if any

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gf_list_insert()

GF_Err gf_list_insert	(	GF_List *	ptr,
		void *	item,
		u32	position
	)

Insert an item in the list

Parameters

ptr	target list object
item	item to add
position	insertion position. It is expressed between 0 and gf_list_count-1, and any bigger value is equivalent to gf_list_add

Returns

error if any

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gf_list_rem()

GF_Err gf_list_rem	(	GF_List *	ptr,
		u32	position
	)

Removes an item from the list given its position

Parameters

ptr	target list object
position	position of the item to remove. It is expressed between 0 and gf_list_count-1.

Returns

error if any

Note

It is the caller responsibility to destroy the content of the list if needed

gf_list_get()

void* gf_list_get	(	GF_List *	ptr,
		u32	position
	)

Gets an item from the list given its position

Parameters

ptr	target list object
position	position of the item to get. It is expressed between 0 and gf_list_count-1.

Returns

the item or NULL if not found

gf_list_find()

s32 gf_list_find	(	GF_List *	ptr,
		void *	item
	)

Finds an item in the list

Parameters

ptr	target list object.
item	the item to find.

Returns

0-based item position in the list, or -1 if the item could not be found.

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gf_list_del_item()

s32 gf_list_del_item	(	GF_List *	ptr,
		void *	item
	)

Deletes an item from the list

Parameters

ptr	target list object.
item	the item to find.

Returns

0-based item position in the list before removal, or -1 if the item could not be found.

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gf_list_reset()

void gf_list_reset

(

GF_List *

ptr

)

Resets the content of the list

Parameters

ptr	target list object.

Note

It is the caller responsibility to destroy the content of the list if needed

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gf_list_last()

void* gf_list_last

(

GF_List *

ptr

)

Gets last item o fthe list

Parameters

ptr	target list object

Returns

the last item

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gf_list_rem_last()

GF_Err gf_list_rem_last

(

GF_List *

ptr

)

Removes the last item of the list

Parameters

ptr	target list object

Returns

error if any

Note

It is the caller responsibility to destroy the content of the list if needed

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gf_list_enum()

void* gf_list_enum	(	GF_List *	ptr,
		u32 *	pos
	)

Retrieves given list item and increment current position

Parameters

ptr	target list object
pos	target item position. The position is automatically incremented regardless of the return value

Note

A typical enumeration will start with a value of 0 until NULL is returned.

Returns

the current item for the given index

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gf_list_swap()

GF_Err gf_list_swap	(	GF_List *	l1,
		GF_List *	l2
	)

Swaps content of two lists

Parameters

l1	first list object
l2	second list object

Returns

error if any

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gf_list_transfer()

GF_Err gf_list_transfer	(	GF_List *	dst,
		GF_List *	src
	)

Transfer content between lists

Parameters

dst	destination list object
src	source list object

Returns

error if any

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gf_list_clone()

GF_List* gf_list_clone

(

GF_List *

ptr

)

Returns a new list as an exact copy of the given list

Parameters

ptr	the list to clone

Returns

the cloned list

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gf_list_pop_front()

void* gf_list_pop_front

(

GF_List *

ptr

)

Removes the first element in the list container, effectively reducing its size by one and returns the popped element.

Parameters

ptr	the list to pop

Returns

the popped element

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gf_list_pop_back()

void* gf_list_pop_back

(

GF_List *

ptr

)

Removes the last element in the list container, effectively reducing the container size by one and return the popped element.

Parameters

ptr	the list to pop

Returns

the popped element

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