Data Structures | Macros | Typedefs | Functions

These functions provide double linked list management. More...

Data Structures

struct  _Eina_List
 Type for a generic double linked list. More...
 
struct  _Eina_List_Accounting
 Cache used to store the last element of a list and the number of elements, for fast access. More...
 

Macros

#define EINA_LIST_FOREACH(list, l, _data)
 Definition for the macro to iterate over a list. More...
 
#define EINA_LIST_REVERSE_FOREACH(list, l, _data)
 Definition for the macro to iterate over a list in the reverse order. More...
 
#define EINA_LIST_FOREACH_SAFE(list, l, l_next, data)
 Definition for the macro to iterate over a list with support for node deletion. More...
 
#define EINA_LIST_REVERSE_FOREACH_SAFE(list, l, l_prev, data)
 Definition for the macro to iterate over a list in the reverse order with support for deletion. More...
 
#define EINA_LIST_FREE(list, data)
 Definition for the macro to remove each list node while having access to each node's data. More...
 

Typedefs

typedef struct _Eina_List Eina_List
 Type for a generic double linked list.
 
typedef struct _Eina_List_Accounting Eina_List_Accounting
 Cache used to store the last element of a list and the number of elements, for fast access.
 

Functions

EINA_API Eina_Listeina_list_append (Eina_List *list, const void *data)
 Appends the given data to the given linked list. More...
 
EINA_API Eina_Listeina_list_prepend (Eina_List *list, const void *data)
 Prepends the given data to the given linked list. More...
 
EINA_API Eina_Listeina_list_append_relative (Eina_List *list, const void *data, const void *relative)
 Inserts the given data into the given linked list after the specified data. More...
 
EINA_API Eina_Listeina_list_append_relative_list (Eina_List *list, const void *data, Eina_List *relative)
 Appends a list node to a linked list after the specified member. More...
 
EINA_API Eina_Listeina_list_prepend_relative (Eina_List *list, const void *data, const void *relative)
 Prepends a data pointer to a linked list before the specified member. More...
 
EINA_API Eina_Listeina_list_prepend_relative_list (Eina_List *list, const void *data, Eina_List *relative)
 Prepends a list node to a linked list before the specified member. More...
 
EINA_API Eina_Listeina_list_sorted_insert (Eina_List *list, Eina_Compare_Cb func, const void *data)
 Inserts a new node into a sorted list. More...
 
EINA_API Eina_Listeina_list_remove (Eina_List *list, const void *data)
 Removes the first instance of the specified data from the given list. More...
 
EINA_API Eina_Listeina_list_remove_list (Eina_List *list, Eina_List *remove_list)
 Removes the specified list node. More...
 
EINA_API Eina_Listeina_list_promote_list (Eina_List *list, Eina_List *move_list)
 Moves the specified data to the head of the list. More...
 
EINA_API Eina_Listeina_list_demote_list (Eina_List *list, Eina_List *move_list)
 Moves the specified data to the tail of the list. More...
 
EINA_API void * eina_list_data_find (const Eina_List *list, const void *data)
 Finds a member of a list and returns it. More...
 
EINA_API Eina_Listeina_list_data_find_list (const Eina_List *list, const void *data)
 Finds a member of a list and returns it as a list node. More...
 
EINA_API Eina_Bool eina_list_move (Eina_List **to, Eina_List **from, void *data)
 Moves a data pointer from one list to another. More...
 
EINA_API Eina_Bool eina_list_move_list (Eina_List **to, Eina_List **from, Eina_List *data)
 Moves a list node from one list to another. More...
 
EINA_API Eina_Listeina_list_free (Eina_List *list)
 Frees an entire list and all the nodes, ignoring the data contained. More...
 
EINA_API void * eina_list_nth (const Eina_List *list, unsigned int n)
 Gets the nth member's data pointer in a list, or NULL on error. More...
 
EINA_API Eina_Listeina_list_nth_list (const Eina_List *list, unsigned int n)
 Gets the nth member's list node in a list. More...
 
EINA_API Eina_Listeina_list_reverse (Eina_List *list)
 Reverses all the elements in the list. More...
 
EINA_API Eina_Listeina_list_reverse_clone (const Eina_List *list)
 Clones (copies) all the elements in the list in reverse order. More...
 
EINA_API Eina_Listeina_list_clone (const Eina_List *list)
 Clones (copies) all the elements in the list in exactly same order. More...
 
EINA_API Eina_Listeina_list_sort (Eina_List *list, unsigned int limit, Eina_Compare_Cb func)
 Sorts a list according to the ordering func will return. More...
 
EINA_API Eina_Listeina_list_shuffle (Eina_List *list, Eina_Random_Cb func)
 Shuffles list. More...
 
EINA_API Eina_Listeina_list_merge (Eina_List *left, Eina_List *right)
 Merges two list. More...
 
EINA_API Eina_Listeina_list_sorted_merge (Eina_List *left, Eina_List *right, Eina_Compare_Cb func)
 Merges two sorted list according to the ordering func will return. More...
 
EINA_API Eina_Listeina_list_split_list (Eina_List *list, Eina_List *relative, Eina_List **right)
 Splits a list into 2 lists. More...
 
EINA_API Eina_Listeina_list_search_sorted_near_list (const Eina_List *list, Eina_Compare_Cb func, const void *data, int *result_cmp)
 Returns node nearest to data from the sorted list. More...
 
EINA_API Eina_Listeina_list_search_sorted_list (const Eina_List *list, Eina_Compare_Cb func, const void *data)
 Returns node if data is in the sorted list. More...
 
EINA_API void * eina_list_search_sorted (const Eina_List *list, Eina_Compare_Cb func, const void *data)
 Returns node data if it is in the sorted list. More...
 
EINA_API Eina_Listeina_list_search_unsorted_list (const Eina_List *list, Eina_Compare_Cb func, const void *data)
 Returns node if data is in the unsorted list. More...
 
EINA_API void * eina_list_search_unsorted (const Eina_List *list, Eina_Compare_Cb func, const void *data)
 Returns node data if it is in the unsorted list. More...
 
static Eina_Listeina_list_last (const Eina_List *list)
 Gets the last list node in the list. More...
 
static Eina_Listeina_list_next (const Eina_List *list)
 Gets the next list node after the specified list node. More...
 
static Eina_Listeina_list_prev (const Eina_List *list)
 Gets the list node prior to the specified list node. More...
 
static void * eina_list_data_get (const Eina_List *list)
 Gets the list node data member. More...
 
static void * eina_list_data_set (Eina_List *list, const void *data)
 Sets the list node data member. More...
 
static unsigned int eina_list_count (const Eina_List *list)
 Gets the count of the number of items in a list. More...
 
static void * eina_list_last_data_get (const Eina_List *list)
 Returns the last list node's data. More...
 
EINA_API Eina_Iteratoreina_list_iterator_new (const Eina_List *list)
 Returns a new iterator associated with a list. More...
 
EINA_API Eina_Iteratoreina_list_iterator_reversed_new (const Eina_List *list)
 Returns a new reversed iterator associated with a list. More...
 
EINA_API Eina_Accessoreina_list_accessor_new (const Eina_List *list)
 Returns a new accessor associated with a list. More...
 
EINA_API int eina_list_data_idx (const Eina_List *list, void *data)
 Finds the member of the list and returns the index. More...
 

Detailed Description

These functions provide double linked list management.

Eina_List is a doubly linked list. It can store data of any type in the form of void pointers. It has convenience functions to do all the common operations which means it should rarely if ever be necessary to directly access the struct's fields. Nevertheless it can be useful to understand the inner workings of the data structure being used.

Eina_List nodes keep references to the previous node, the next node, its data and to an accounting structure.

Eina_List_Accounting is used to improve the performance of some functions. It is private and should not be modified. It contains a reference to the end of the list and the number of elements in the list.

Note
Every function that modifies the contents of the list returns a pointer to the head of the list and it is essential that this be pointer be used in any future references to the list.

Most functions have two versions that have the same effect but operate on different arguments, the plain functions operate over data(e.g..: eina_list_append_relative, eina_list_remove, eina_list_data_find), the list versions of these functions operate on Eina_List nodes.

Warning
You must always use the pointer to the first element of the list as the list!
You must never use a pointer to an element in the middle of the list as the list!

Here are some examples of Eina_List usage:

Macro Definition Documentation

◆ EINA_LIST_FOREACH

#define EINA_LIST_FOREACH (   list,
  l,
  _data 
)
Value:
for (l = list, \
_data = eina_list_data_get(l), \
l ? (EINA_PREFETCH(((Eina_List *)l)->next), EINA_PREFETCH(_data)) : EINA_PREFETCH(l); \
\
l; \
\
l = eina_list_next(l), \
_data = eina_list_data_get(l), \
l ? (EINA_PREFETCH(((Eina_List *)l)->next), EINA_PREFETCH(_data)) : EINA_PREFETCH(l))
static void * eina_list_data_get(const Eina_List *list)
Gets the list node data member.
static Eina_List * eina_list_next(const Eina_List *list)
Gets the next list node after the specified list node.
#define EINA_PREFETCH(arg)
Hints that the pointer arg needs to be pre-fetched into cache.
Definition: eina_types.h:468
Type for a generic double linked list.
Definition: eina_list.h:318

Definition for the macro to iterate over a list.

Parameters
[in]listThe list to iterate over.
[out]lA list that is used as an iterator and points to the current node.
[out]_dataCurrent item's data.

This macro iterates over list from the first element to the last. data is the data related to the current element. l is an Eina_List used as the list iterator.

The following diagram illustrates this macro iterating over a list of four elements("one", "two", "three" and "four"):

It can be used to free list data, as in the following example:

Eina_List *list;
char *data;
// list is already filled,
// its elements are just duplicated strings,
// EINA_LIST_FOREACH will be used to free those strings
EINA_LIST_FOREACH(list, l, data)
free(data);
EINA_API Eina_List * eina_list_free(Eina_List *list)
Frees an entire list and all the nodes, ignoring the data contained.
Definition: eina_list.c:823
#define EINA_LIST_FOREACH(list, l, _data)
Definition for the macro to iterate over a list.
Definition: eina_list.h:1415
Note
This is not the optimal way to release memory allocated to a list, since it iterates over the list twice. For an optimized algorithm, use EINA_LIST_FREE().
Warning
list must be a pointer to the first element of the list.
Be careful when deleting list nodes. If you remove the current node and continue iterating, the code will fail because the macro will not be able to get the next node. Notice that it's OK to remove any node if you stop the loop after that. For destructive operations such as this, consider using EINA_LIST_FOREACH_SAFE().
Examples
diskselector_example_02.c, ecore_con_server_simple_example.c, ecore_con_url_cookies_example.c, ecore_con_url_headers_example.c, ecore_evas_basics_example.c, ecore_imf_example.c, edje-box2.c, eet-data-file_descriptor_01.c, eet-data-file_descriptor_02.c, eet-data-nested.c, eina_inlist_02.c, eina_list_01.c, emotion_test_main.c, entry_example.c, evas-box.c, evas-buffer-simple.c, evas-events.c, evas-init-shutdown.c, gengrid_example.c, genlist_example_02.c, genlist_example_05.c, hoversel_example_01.c, list_example_03.c, slideshow_example.c, test_growing_balls.c, and transit_example_04.c.

◆ EINA_LIST_REVERSE_FOREACH

#define EINA_LIST_REVERSE_FOREACH (   list,
  l,
  _data 
)
Value:
for (l = eina_list_last(list), \
_data = eina_list_data_get(l), \
l ? (EINA_PREFETCH(((Eina_List *)l)->prev), EINA_PREFETCH(_data)) : EINA_PREFETCH(l); \
l; \
l = eina_list_prev(l), \
_data = eina_list_data_get(l), \
l ? (EINA_PREFETCH(((Eina_List *)l)->prev), EINA_PREFETCH(_data)) : EINA_PREFETCH(l))
static Eina_List * eina_list_prev(const Eina_List *list)
Gets the list node prior to the specified list node.
static Eina_List * eina_list_last(const Eina_List *list)
Gets the last list node in the list.

Definition for the macro to iterate over a list in the reverse order.

Parameters
[in]listThe list to iterate over.
[out]lA list that is used as an iterator and points to the current node.
[out]_dataCurrent item's data.

This macro works like EINA_LIST_FOREACH, but iterates from the last element of a list to the first. data is the data related to the current element, while l is an Eina_List that is used as the list iterator.

The following diagram illustrates this macro iterating over a list of four elements("one", "two", "three" and "four"):

It can be used to free list data, as in the following example:

Eina_List *list;
char *data;
// list is already filled,
// its elements are just duplicated strings,
// EINA_LIST_REVERSE_FOREACH will be used to free those strings
free(data);
#define EINA_LIST_REVERSE_FOREACH(list, l, _data)
Definition for the macro to iterate over a list in the reverse order.
Definition: eina_list.h:1474
Note
This is not the optimal way to release memory allocated to a list, since it iterates over the list twice. For an optimized algorithm, use EINA_LIST_FREE().
Warning
list must be a pointer to the first element of the list.
Be careful when deleting list nodes. If you remove the current node and continue iterating, the code will fail because the macro will not be able to get the next node. Notice that it's OK to remove any node if you stop the loop after that. For destructive operations such as this, consider using EINA_LIST_REVERSE_FOREACH_SAFE().

◆ EINA_LIST_FOREACH_SAFE

#define EINA_LIST_FOREACH_SAFE (   list,
  l,
  l_next,
  data 
)
Value:
for (l = list, \
l_next = eina_list_next(l), \
EINA_PREFETCH(l_next), \
data = eina_list_data_get(l); \
EINA_PREFETCH(data), \
l; \
l = l_next, \
l_next = eina_list_next(l), \
EINA_PREFETCH(l_next), \
data = eina_list_data_get(l), \
EINA_PREFETCH(data))

Definition for the macro to iterate over a list with support for node deletion.

Parameters
[in]listThe list to iterate over.
[out]lA list that is used as an iterator and points to the current node.
[out]l_nextA list that is used as an iterator and points to the next node.
[out]dataCurrent item's data.

This macro iterates over list from the first element to the last. data is the data related to the current element. l is an Eina_List used as the list iterator.

Since this macro stores a pointer to the next list node in l_next, deleting the current node and continuing looping is safe.

The following diagram illustrates this macro iterating over a list of four elements ("one", "two", "three" and "four"):

This macro can be used to free list nodes, as in the following example:

Eina_List *list;
Eina_List *l_next;
char *data;
// list is already filled,
// its elements are just duplicated strings,
// EINA_LIST_FOREACH_SAFE will be used to free elements that match "key".
EINA_LIST_FOREACH_SAFE(list, l, l_next, data)
if (strcmp(data, "key") == 0)
{
free(data);
list = eina_list_remove_list(list, l);
}
#define EINA_LIST_FOREACH_SAFE(list, l, l_next, data)
Definition for the macro to iterate over a list with support for node deletion.
Definition: eina_list.h:1526
EINA_API Eina_List * eina_list_remove_list(Eina_List *list, Eina_List *remove_list)
Removes the specified list node.
Definition: eina_list.c:786
Warning
list must be a pointer to the first element of the list.
Examples
eina_inlist_02.c.

◆ EINA_LIST_REVERSE_FOREACH_SAFE

#define EINA_LIST_REVERSE_FOREACH_SAFE (   list,
  l,
  l_prev,
  data 
)
Value:
for (l = eina_list_last(list), \
l_prev = eina_list_prev(l), \
EINA_PREFETCH(l_prev), \
data = eina_list_data_get(l); \
EINA_PREFETCH(data), \
l; \
l = l_prev, \
l_prev = eina_list_prev(l), \
EINA_PREFETCH(l_prev), \
data = eina_list_data_get(l), \
EINA_PREFETCH(data))

Definition for the macro to iterate over a list in the reverse order with support for deletion.

Parameters
[in]listThe list to iterate over.
[out]lA list that is used as an iterator and points to the current node.
[out]l_prevA list that is used as an iterator and points to the previous node.
[out]dataCurrent item's data.

This macro works like EINA_LIST_FOREACH_SAFE, but iterates from the last element of a list to the first. data is the data related to the current element, while l is an Eina_List that is used as the list iterator.

Since this macro stores a pointer to the previous list node in l_prev, deleting the current node and continuing looping is safe.

The following diagram illustrates this macro iterating over a list of four elements ("one", "two", "three" and "four"):

This macro can be used to free list nodes, as in the following example:

Eina_List *list;
Eina_List *l_prev;
char *data;
// list is already filled,
// its elements are just duplicated strings,
// EINA_LIST_REVERSE_FOREACH_SAFE will be used to free elements that match "key".
EINA_LIST_REVERSE_FOREACH_SAFE(list, l, l_prev, data)
if (strcmp(data, "key") == 0)
{
free(data);
list = eina_list_remove_list(list, l);
}
#define EINA_LIST_REVERSE_FOREACH_SAFE(list, l, l_prev, data)
Definition for the macro to iterate over a list in the reverse order with support for deletion.
Definition: eina_list.h:1584
Warning
list must be a pointer to the first element of the list.

◆ EINA_LIST_FREE

#define EINA_LIST_FREE (   list,
  data 
)
Value:
for (data = eina_list_data_get(list), \
list ? EINA_PREFETCH(((Eina_List *)list)->next) : EINA_PREFETCH(list); \
list; \
list = eina_list_remove_list(list, list), \
list ? EINA_PREFETCH(((Eina_List *)list)->next) : EINA_PREFETCH(list), \
data = eina_list_data_get(list))

Definition for the macro to remove each list node while having access to each node's data.

Parameters
[in,out]listThe list that will be cleared.
[out]dataCurrent node's data.

This macro will call eina_list_remove_list for each list node, and store the data contained in the current node in data.

The following diagram illustrates this macro iterating over a list of four elements ("one", "two", "three" and "four"):

If you do not need to release node data, it is easier to call eina_list_free().

Eina_List *list;
char *data;
// list is already filled,
// its elements are just duplicated strings,
EINA_LIST_FREE(list, data)
free(data);
#define EINA_LIST_FREE(list, data)
Definition for the macro to remove each list node while having access to each node's data.
Definition: eina_list.h:1629
Warning
list must be a pointer to the first element of the list.
See also
eina_list_free()
Examples
ecore_imf_example.c, ecore_thread_example.c, edje-color-class.c, eet-data-file_descriptor_01.c, eet-data-file_descriptor_02.c, eet-data-nested.c, efl_thread_6.c, eina_list_04.c, eina_tiler_01.c, emotion_test_main.c, genlist_example_02.c, and genlist_example_05.c.

Function Documentation

◆ eina_list_append()

EINA_API Eina_List * eina_list_append ( Eina_List list,
const void *  data 
)

Appends the given data to the given linked list.

Parameters
[in,out]listThe given list.
[in]dataThe data to append.
Returns
A list pointer, or NULL on error.

This function appends data to list. If list is NULL, a new list is returned. On success, a new list pointer that should be used in place of the one given to this function is returned. Otherwise, the old pointer is returned.

The following example code demonstrates how to ensure that the given data has been successfully appended.

Eina_List *list = NULL;
extern void *my_data;
list = eina_list_append(list, my_data);
EINA_API Eina_List * eina_list_append(Eina_List *list, const void *data)
Appends the given data to the given linked list.
Definition: eina_list.c:584
Warning
list must be a pointer to the first element of the list(or NULL).

References _Eina_List::accounting, _Eina_List::data, _Eina_List_Accounting::last, _Eina_List::next, and _Eina_List::prev.

Referenced by ecore_con_eet_client_connect_callback_add(), ecore_con_eet_client_disconnect_callback_add(), ecore_con_eet_server_connect_callback_add(), ecore_con_eet_server_disconnect_callback_add(), ecore_con_lookup(), ecore_con_socks4_remote_add(), ecore_con_socks5_remote_add(), ecore_con_ssl_server_cafile_add(), ecore_con_ssl_server_cert_add(), ecore_con_ssl_server_crl_add(), ecore_con_ssl_server_privkey_add(), ecore_con_url_new(), ecore_drm2_plane_assign(), ecore_drm2_plane_fb_set(), ecore_drm2_plane_release(), ecore_drm_device_find(), ecore_evas_aux_hint_add(), ecore_evas_aux_hints_allowed_get(), ecore_evas_ecore_evas_list_get(), ecore_evas_vnc_start(), ecore_file_ls(), ecore_fork_reset_callback_add(), ecore_imf_context_event_callback_add(), ecore_imf_context_input_panel_event_callback_add(), ecore_main_fd_handler_prepare_callback_set(), ecore_thread_feedback_run(), ecore_thread_run(), ecore_wl2_offer_receive(), ecore_wl2_window_aux_hints_supported_get(), edje_available_modules_get(), edje_edit_color_class_add(), edje_edit_color_classes_list_get(), edje_edit_data_list_get(), edje_edit_externals_list_get(), edje_edit_fonts_list_get(), edje_edit_group_aliases_get(), edje_edit_group_data_list_get(), edje_edit_image_set_image_add(), edje_edit_image_set_images_list_get(), edje_edit_image_set_list_get(), edje_edit_images_list_get(), edje_edit_part_items_list_get(), edje_edit_parts_list_get(), edje_edit_program_after_add(), edje_edit_program_after_insert_at(), edje_edit_program_target_add(), edje_edit_program_target_insert_at(), edje_edit_programs_list_get(), edje_edit_size_class_add(), edje_edit_size_classes_list_get(), edje_edit_sound_samples_list_get(), edje_edit_sound_tones_list_get(), edje_edit_state_add(), edje_edit_state_external_param_set(), edje_edit_state_tweens_list_get(), edje_edit_style_add(), edje_edit_style_tag_add(), edje_edit_style_tags_list_get(), edje_edit_styles_list_get(), edje_edit_text_class_add(), edje_edit_text_classes_list_get(), edje_edit_vectors_list_get(), edje_mmap_collection_list(), edje_mmap_color_class_used_list(), edje_mmap_group_exists(), edje_object_access_part_list_get(), edje_object_perspective_set(), edje_object_text_insert_filter_callback_add(), edje_object_text_markup_filter_callback_add(), eet_eina_stream_data_descriptor_class_set(), eet_node_hash_new(), eet_node_list_append(), eeze_disk_eject(), eeze_disk_new_from_mount(), eeze_disk_unmount(), eeze_net_list(), eeze_udev_find_by_filter(), eeze_udev_find_by_subsystem_sysname(), eeze_udev_find_by_sysattr(), eeze_udev_find_by_type(), eeze_udev_syspath_get_parents(), eeze_udev_syspath_get_sysattr_list(), efreet_desktop_category_add(), efreet_desktop_command_local_get(), efreet_desktop_command_progress_get(), efreet_desktop_string_list_parse(), efreet_desktop_type_add(), efreet_icon_list_find(), efreet_util_desktop_categories_list(), efreet_util_desktop_environments_list(), efreet_util_desktop_exec_glob_list(), eina_benchmark_run(), eina_debug_opcodes_register(), eina_file_flush(), eina_hash_list_append(), eina_hash_list_direct_append(), eina_hash_list_direct_prepend(), eina_hash_list_prepend(), eina_list_append_relative(), eina_list_append_relative_list(), eina_list_clone(), eina_list_move(), eina_list_move_list(), eina_list_sorted_insert(), eina_multi_iterator_internal_new(), eina_rectangle_pool_new(), eldbus_connection_event_callback_del(), eldbus_name_owner_changed_callback_del(), eldbus_object_event_callback_del(), eldbus_object_signal_handler_add(), eldbus_proxy_event_callback_del(), eldbus_proxy_signal_handler_add(), elm_color_class_editor_add(), elm_color_class_util_edje_file_list(), elm_config_profile_derived_add(), elm_drag_item_container_add(), elm_drop_item_container_add(), elm_layout_content_swallow_list_get(), elm_radio_group_add(), elm_theme_copy(), elm_theme_extension_list_get(), elm_theme_list_get(), elm_theme_overlay_list_get(), elm_theme_ref_set(), elm_transit_chain_transit_add(), elm_transit_object_add(), elua_state_include_path_add(), elua_util_require(), ethumb_client_thumb_exists(), evas_device_add_full(), evas_font_path_global_append(), evas_object_box_children_get(), evas_object_clipees_get(), evas_object_image_video_surface_set(), evas_object_smart_members_get(), evas_object_textblock_cursor_new(), evas_textblock_cursor_range_formats_get(), and evas_textblock_cursor_range_simple_geometry_get().

◆ eina_list_prepend()

EINA_API Eina_List * eina_list_prepend ( Eina_List list,
const void *  data 
)

Prepends the given data to the given linked list.

Parameters
[in,out]listThe given list.
[in]dataThe data to prepend.
Returns
A list pointer, or NULL on error.

This function prepends data to list. If list is NULL, a new list is returned. On success, a new list pointer that should be used in place of the one given to this function is returned. Otherwise, the old pointer is returned.

The following example code demonstrates how to ensure that the given data has been successfully prepended.

Example:

Eina_List *list = NULL;
extern void *my_data;
list = eina_list_prepend(list, my_data);
EINA_API Eina_List * eina_list_prepend(Eina_List *list, const void *data)
Prepends the given data to the given linked list.
Definition: eina_list.c:618
Warning
list must be a pointer to the first element of the list.

References _Eina_List::data, _Eina_List::next, and _Eina_List::prev.

Referenced by edje_edit_group_add(), eet_node_struct_child_new(), eeze_udev_find_similar_from_syspath(), efreet_icon_extension_add(), eina_hash_list_direct_prepend(), eina_hash_list_prepend(), eina_list_prepend_relative(), eina_list_prepend_relative_list(), eina_list_reverse_clone(), evas_font_path_global_prepend(), evas_gl_pbuffer_surface_create(), evas_gl_surface_create(), evas_post_event_callback_push(), and evas_textblock_node_format_remove_pair().

◆ eina_list_append_relative()

EINA_API Eina_List * eina_list_append_relative ( Eina_List list,
const void *  data,
const void *  relative 
)

Inserts the given data into the given linked list after the specified data.

Parameters
[in,out]listThe given linked list.
[in]dataThe data to insert.
[in]relativeThe data to insert after.
Returns
A list pointer, or NULL on error.

This function inserts data into list after relative. If relative is not in the list, data is appended to the list. If list is NULL, a new list is returned. If there are multiple instances of relative in the list, data is inserted after the first instance. On success, a new list pointer that should be used in place of the one given to this function is returned. Otherwise, the old pointer is returned.

The following example code demonstrates how to ensure that the given data has been successfully inserted.

Eina_List *list = NULL;
extern void *my_data;
extern void *relative_member;
list = eina_list_append(list, relative_member);
list = eina_list_append_relative(list, my_data, relative_member);
EINA_API Eina_List * eina_list_append_relative(Eina_List *list, const void *data, const void *relative)
Inserts the given data into the given linked list after the specified data.
Definition: eina_list.c:649
Warning
list must be a pointer to the first element of the list.

References eina_list_append(), eina_list_append_relative_list(), and EINA_LIST_FOREACH.

Referenced by elm_object_focus_custom_chain_append().

◆ eina_list_append_relative_list()

EINA_API Eina_List * eina_list_append_relative_list ( Eina_List list,
const void *  data,
Eina_List relative 
)

Appends a list node to a linked list after the specified member.

Parameters
[in,out]listThe given linked list.
[in]dataThe data to insert.
[in]relativeThe list node to insert after.
Returns
A list pointer, or NULL on error.

This function inserts data into list after the list node relative. If list or relative are NULL, data is just appended to list using eina_list_append(). If list is NULL, a new list is returned. If there are multiple instances of relative in the list, data is inserted after the first instance. On success, a new list pointer that should be used in place of the one given to this function is returned. Otherwise, the old pointer is returned.

Warning
list must be a pointer to the first element of the list.

References _Eina_List::accounting, _Eina_List::data, eina_list_append(), _Eina_List_Accounting::last, _Eina_List::next, and _Eina_List::prev.

Referenced by eina_list_append_relative(), and eina_list_sorted_insert().

◆ eina_list_prepend_relative()

EINA_API Eina_List * eina_list_prepend_relative ( Eina_List list,
const void *  data,
const void *  relative 
)

Prepends a data pointer to a linked list before the specified member.

Parameters
[in,out]listThe given linked list.
[in]dataThe data to insert.
[in]relativeThe member that data will be inserted before.
Returns
A list pointer, or NULL on error.

This function inserts data to list before relative. If relative is not in the list, data is prepended to the list with eina_list_prepend(). If list is NULL, a new list is returned. If there are multiple instances of relative in the list, data is inserted before the first instance. On success, a new list pointer that should be used in place of the one given to this function is returned. Otherwise, the old pointer is returned.

The following code example demonstrates how to ensure that the given data has been successfully inserted.

Eina_List *list = NULL;
extern void *my_data;
extern void *relative_member;
list = eina_list_append(list, relative_member);
list = eina_list_prepend_relative(list, my_data, relative_member);
EINA_API Eina_List * eina_list_prepend_relative(Eina_List *list, const void *data, const void *relative)
Prepends a data pointer to a linked list before the specified member.
Definition: eina_list.c:704
Warning
list must be a pointer to the first element of the list.

References EINA_LIST_FOREACH, eina_list_prepend(), and eina_list_prepend_relative_list().

Referenced by elm_object_focus_custom_chain_prepend().

◆ eina_list_prepend_relative_list()

EINA_API Eina_List * eina_list_prepend_relative_list ( Eina_List list,
const void *  data,
Eina_List relative 
)

Prepends a list node to a linked list before the specified member.

Parameters
[in,out]listThe given linked list.
[in]dataThe data to insert.
[in]relativeThe list node to insert before.
Returns
A list pointer, or NULL on error.

This function inserts data to list before the list node relative. If list or relative are NULL, data is just prepended to list using eina_list_prepend(). If list is NULL, a new list is returned. If there are multiple instances of relative in the list, data is inserted before the first instance. On success, a new list pointer that should be used in place of the one given to this function is returned. Otherwise, the old pointer is returned.

Warning
list must be a pointer to the first element of the list.

References _Eina_List::data, eina_list_prepend(), _Eina_List::next, and _Eina_List::prev.

Referenced by edje_edit_program_after_insert_at(), edje_edit_program_target_insert_at(), eina_list_prepend_relative(), and eina_list_sorted_insert().

◆ eina_list_sorted_insert()

EINA_API Eina_List * eina_list_sorted_insert ( Eina_List list,
Eina_Compare_Cb  func,
const void *  data 
)

Inserts a new node into a sorted list.

Parameters
[in,out]listThe given linked list, must be sorted.
[in]funcThe function called for the sort.
[in]dataThe data to be inserted in sorted order.
Returns
A list pointer, or NULL on error.

This function inserts values into a linked list assuming it was sorted and the result will be sorted. If list is NULL, a new list is returned. On success, a new list pointer that should be used in place of the one given to this function is returned. Otherwise, the old pointer is returned.

Note
O(log2(n)) comparisons (calls to func) average/worst case performance as it uses eina_list_search_sorted_near_list() and thus is bounded to that. As said in eina_list_search_sorted_near_list(), lists do not have O(1) access time, so walking to the correct node can be costly, consider worst case to be almost O(n) pointer dereference (list walk).
Warning
list must be a pointer to the first element of the list.

References eina_list_append(), eina_list_append_relative_list(), eina_list_prepend_relative_list(), and eina_list_search_sorted_near_list().

◆ eina_list_remove()

EINA_API Eina_List * eina_list_remove ( Eina_List list,
const void *  data 
)

Removes the first instance of the specified data from the given list.

Parameters
[in,out]listThe given list.
[in]dataThe specified data.
Returns
A list pointer, or NULL on error.

This function removes the first instance of data from list. If data is not in the given list or is NULL, nothing is done and the specified list returned. If list is NULL, NULL is returned, otherwise a new list pointer that should be used in place of the one passed to this function is returned.

Warning
list must be a pointer to the first element of the list.

References eina_list_data_find_list(), and eina_list_remove_list().

Referenced by ecore_con_socks4_remote_del(), ecore_con_socks5_remote_del(), ecore_con_socks_remote_del(), ecore_drm2_plane_assign(), ecore_evas_aux_hint_del(), ecore_fb_input_device_close(), ecore_imf_context_input_panel_event_callback_clear(), ecore_ipc_client_del(), ecore_ipc_server_del(), ecore_thread_feedback_run(), ecore_thread_run(), edje_edit_color_class_del(), edje_edit_size_class_del(), edje_edit_string_list_free(), edje_edit_style_del(), edje_edit_style_tag_del(), edje_edit_text_class_del(), edje_file_collection_list_free(), edje_object_perspective_set(), eeze_disk_free(), efreet_desktop_category_del(), efreet_menu_desktop_remove(), eina_hash_list_remove(), eina_quadtree_del(), elm_radio_group_add(), elm_transit_chain_transit_add(), elm_transit_chain_transit_del(), ethumb_client_thumb_exists_cancel(), evas_font_path_global_clear(), evas_gl_context_destroy(), evas_gl_surface_destroy(), evas_object_image_video_surface_set(), and evas_textblock_cursor_free().

◆ eina_list_remove_list()

EINA_API Eina_List * eina_list_remove_list ( Eina_List list,
Eina_List remove_list 
)

Removes the specified list node.

Parameters
[in,out]listThe given linked list.
[in]remove_listThe list node which is to be removed.
Returns
A list pointer, or NULL on error.

This function removes the list node remove_list from list and frees the list node structure remove_list. If list is NULL, this function returns NULL. If remove_list is NULL, it returns list; otherwise, a new list pointer that should be used in place of the one passed to this function.

The following code gives an example. (Notice we use EINA_LIST_FOREACH rather than EINA_LIST_FOREACH_SAFE because we stop the loop after removing the current node.)

extern Eina_List *list;
extern void *my_data;
void *data
EINA_LIST_FOREACH(list, l, data)
{
if (data == my_data)
{
list = eina_list_remove_list(list, l);
break;
}
}
Warning
list must be a pointer to the first element of the list.

References _Eina_List::accounting, _Eina_List_Accounting::last, _Eina_List::next, and _Eina_List::prev.

Referenced by ecore_con_eet_client_connect_callback_del(), ecore_con_eet_client_disconnect_callback_del(), ecore_con_eet_server_connect_callback_del(), ecore_con_eet_server_disconnect_callback_del(), ecore_fork_reset(), ecore_fork_reset_callback_del(), ecore_imf_context_event_callback_del(), ecore_imf_context_input_panel_event_callback_del(), ecore_thread_cancel(), edje_edit_group_del(), edje_edit_image_set_image_del(), edje_edit_program_after_del(), edje_edit_program_afters_clear(), edje_edit_program_del(), edje_edit_program_target_del(), edje_edit_program_targets_clear(), edje_object_text_insert_filter_callback_del(), edje_object_text_insert_filter_callback_del_full(), edje_object_text_markup_filter_callback_del(), edje_object_text_markup_filter_callback_del_full(), eina_debug_timer_del(), eina_file_common_map_free(), eina_list_move(), eina_list_move_list(), eina_list_remove(), elm_spinner_special_value_del(), and evas_textblock_node_format_remove_pair().

◆ eina_list_promote_list()

EINA_API Eina_List * eina_list_promote_list ( Eina_List list,
Eina_List move_list 
)

Moves the specified data to the head of the list.

Parameters
[in,out]listThe given linked list.
[in]move_listThe list node to move.
Returns
A new list handle to replace the old one, or NULL on error.

This function moves move_list to the front of list. If list is NULL, NULL is returned. If move_list is NULL, list is returned. Otherwise, a new list pointer that should be used in place of the one passed to this function is returned.

Example:

extern Eina_List *list;
extern void *my_data;
void *data;
EINA_LIST_FOREACH(list, l, data)
{
if (data == my_data)
{
list = eina_list_promote_list(list, l);
break;
}
}
EINA_API Eina_List * eina_list_promote_list(Eina_List *list, Eina_List *move_list)
Moves the specified data to the head of the list.
Definition: eina_list.c:845
Warning
list must be a pointer to the first element of the list.

References _Eina_List::accounting, _Eina_List_Accounting::last, _Eina_List::next, and _Eina_List::prev.

Referenced by efreet_icon_extension_add().

◆ eina_list_demote_list()

EINA_API Eina_List * eina_list_demote_list ( Eina_List list,
Eina_List move_list 
)

Moves the specified data to the tail of the list.

Parameters
[in,out]listThe given linked list.
[in]move_listThe list node to move.
Returns
A new list handle to replace the old one, or NULL on error.

This function move move_list to the end of list. If list is NULL, NULL is returned. If move_list is NULL, list is returned. Otherwise, a new list pointer that should be used in place of the one passed to this function is returned.

Example:

extern Eina_List *list;
extern void *my_data;
void *data;
EINA_LIST_FOREACH(list, l, data)
{
if (data == my_data)
{
list = eina_list_demote_list(list, l);
break;
}
}
EINA_API Eina_List * eina_list_demote_list(Eina_List *list, Eina_List *move_list)
Moves the specified data to the tail of the list.
Definition: eina_list.c:889
Warning
list must be a pointer to the first element of the list.

References _Eina_List::accounting, _Eina_List_Accounting::last, _Eina_List::next, and _Eina_List::prev.

◆ eina_list_data_find()

EINA_API void * eina_list_data_find ( const Eina_List list,
const void *  data 
)

Finds a member of a list and returns it.

Parameters
[in]listThe linked list to search.
[in]dataThe data member to find in the list.
Returns
The data member pointer if found, or NULL otherwise.

This function searches in list from beginning to end for the first member whose data pointer is data. If it is found, data will be returned, otherwise NULL will be returned.

Example:

extern Eina_List *list;
extern void *my_data;
if (eina_list_data_find(list, my_data) == my_data)
{
printf("Found member %p\n", my_data);
}
EINA_API void * eina_list_data_find(const Eina_List *list, const void *data)
Finds a member of a list and returns it.
Definition: eina_list.c:928
Warning
list must be a pointer to the first element of the list.

References eina_list_data_find_list().

Referenced by ecore_evas_focus_device_get(), and ecore_main_fd_handler_prepare_callback_set().

◆ eina_list_data_find_list()

EINA_API Eina_List * eina_list_data_find_list ( const Eina_List list,
const void *  data 
)

Finds a member of a list and returns it as a list node.

Parameters
[in]listThe list to search for data.
[in]dataThe data pointer to find in the list.
Returns
A list node containing the data member on success, NULL otherwise.

This function searches list from beginning to end for the first member whose data pointer is data. If it is found, the list node containing the specified member is returned, otherwise NULL is returned.

Warning
list must be a pointer to the first element of the list.

References EINA_LIST_FOREACH.

Referenced by efreet_icon_extension_add(), eina_debug_timer_del(), eina_list_data_find(), eina_list_move(), eina_list_remove(), and elm_transit_object_add().

◆ eina_list_move()

EINA_API Eina_Bool eina_list_move ( Eina_List **  to,
Eina_List **  from,
void *  data 
)

Moves a data pointer from one list to another.

Parameters
[in,out]toThe list to move the data to.
[in,out]fromThe list to move from.
[in]dataThe data member to move.
Returns
EINA_TRUE on success, EINA_FALSE otherwise.

This function is a shortcut for doing the following: to = eina_list_append(to, data); from = eina_list_remove(from, data);

Warning
list must be a pointer to the first element of the list.

References EINA_FALSE, eina_list_append(), eina_list_data_find_list(), eina_list_remove_list(), EINA_SAFETY_ON_NULL_RETURN_VAL, and EINA_TRUE.

◆ eina_list_move_list()

EINA_API Eina_Bool eina_list_move_list ( Eina_List **  to,
Eina_List **  from,
Eina_List data 
)

Moves a list node from one list to another.

Parameters
[in,out]toThe list to move the data to.
[in,out]fromThe list to move from.
[in]dataThe list node containing the data to move.
Returns
EINA_TRUE on success, EINA_FALSE otherwise.

This function is a shortcut for doing the following: to = eina_list_append(to, data->data); from = eina_list_remove_list(from, data);

Warning
list must be a pointer to the first element of the list.

References _Eina_List::data, EINA_FALSE, eina_list_append(), eina_list_remove_list(), EINA_SAFETY_ON_NULL_RETURN_VAL, and EINA_TRUE.

◆ eina_list_free()

EINA_API Eina_List * eina_list_free ( Eina_List list)

◆ eina_list_nth()

EINA_API void * eina_list_nth ( const Eina_List list,
unsigned int  n 
)

Gets the nth member's data pointer in a list, or NULL on error.

Parameters
[in]listThe list to get the specified member number from.
[in]nThe number of the element (0 being the first).
Returns
The data pointer stored in the specified element.

This function returns the data pointer of element number n, in the list. The first element in the array is element number 0. If the element number n does not exist, NULL is returned. Otherwise, the data of the found element is returned.

Note
Worst case is O(n).
Warning
list must be a pointer to the first element of the list.

References _Eina_List::data, and eina_list_nth_list().

Referenced by edje_edit_image_set_image_border_get(), edje_edit_image_set_image_border_scale_get(), edje_edit_image_set_image_border_scale_set(), edje_edit_image_set_image_border_set(), edje_edit_image_set_image_del(), efreet_desktop_free(), efreet_desktop_get(), efreet_desktop_save(), efreet_desktop_type_alias(), evas_touch_point_list_nth_id_get(), and evas_touch_point_list_nth_state_get().

◆ eina_list_nth_list()

EINA_API Eina_List * eina_list_nth_list ( const Eina_List list,
unsigned int  n 
)

Gets the nth member's list node in a list.

Parameters
[in]listThe list to get the specified member number from.
[in]nThe number of the element (0 being the first).
Returns
The list node stored in the numbered element, or NULL on error.

This function returns the list node of element number n, in list. The first element in the array is element number 0. If the element number n does not exist or list is NULL or n is greater than the count of elements in list minus 1, NULL is returned. Otherwise the list node stored in the numbered element is returned.

Note
Worst case is O(n).
Warning
list must be a pointer to the first element of the list.

References _Eina_List::accounting, _Eina_List_Accounting::count, _Eina_List_Accounting::last, _Eina_List::next, and _Eina_List::prev.

Referenced by edje_edit_image_set_image_del(), edje_edit_program_after_insert_at(), edje_edit_program_target_insert_at(), eina_list_nth(), and eina_list_sort().

◆ eina_list_reverse()

EINA_API Eina_List * eina_list_reverse ( Eina_List list)

Reverses all the elements in the list.

Parameters
[in,out]listThe list to reverse.
Returns
The list head after it has been reversed, or NULL on error.

This function reverses the order of all elements in list, so the last member is now first, and so on. If list is NULL, this function returns NULL.

Note
in-place: this will change the given list, so you should now point to the new list head that is returned by this function.
Warning
list must be a pointer to the first element of the list.
See also
eina_list_reverse_clone()
eina_list_iterator_reversed_new()

References _Eina_List::accounting, _Eina_List::data, _Eina_List_Accounting::last, _Eina_List::next, and _Eina_List::prev.

◆ eina_list_reverse_clone()

EINA_API Eina_List * eina_list_reverse_clone ( const Eina_List list)

Clones (copies) all the elements in the list in reverse order.

Parameters
[in]listThe list to reverse.
Returns
The new list that has been reversed, or NULL on error.

This function reverses the order of all elements in list, so the last member is now first, and so on. If list is NULL, this function returns NULL. This returns a copy of the given list.

Note
copy: this will copy the list and you should then eina_list_free() when it is not required anymore.
Warning
list must be a pointer to the first element of the list.
See also
eina_list_reverse()
eina_list_clone()

References EINA_LIST_FOREACH, and eina_list_prepend().

◆ eina_list_clone()

EINA_API Eina_List * eina_list_clone ( const Eina_List list)

Clones (copies) all the elements in the list in exactly same order.

Parameters
[in]listThe list to clone.
Returns
The new list that has been cloned, or NULL on error.

This function clone in order of all elements in list. If list is NULL, this function returns NULL. This returns a copy of the given list.

Note
copy: this will copy the list and you should then eina_list_free() when it is not required anymore.
Warning
list must be a pointer to the first element of the list.
See also
eina_list_reverse_clone()

References eina_list_append(), and EINA_LIST_FOREACH.

Referenced by ecore_evas_engines_get(), elm_object_focus_custom_chain_append(), and elm_object_focus_custom_chain_prepend().

◆ eina_list_sort()

EINA_API Eina_List * eina_list_sort ( Eina_List list,
unsigned int  limit,
Eina_Compare_Cb  func 
)

Sorts a list according to the ordering func will return.

Parameters
[in]listThe list handle to sort.
[in]limitThe maximum number of list elements to sort.
[in]funcA function pointer that can handle comparing the list data nodes.
Returns
The new head of list.

This function sorts list. If limit is 0 or greater than the number of elements in list, all the elements are sorted. func is used to compare two elements of list. If func is NULL, this function returns list.

Note
in-place: this will change the given list, so you should now point to the new list head that is returned by this function.
Worst case is O(n * log2(n)) comparisons (calls to func()). That means that for 1,000,000 list sort will do 20,000,000 comparisons.

Example:

int
sort_cb(const void *d1, const void *d2)
{
const char *txt = d1;
const char *txt2 = d2;
if(!txt) return(1);
if(!txt2) return(-1);
return(strcmp(txt, txt2));
}
extern Eina_List *list;
list = eina_list_sort(list, eina_list_count(list), sort_cb);
static unsigned int eina_list_count(const Eina_List *list)
Gets the count of the number of items in a list.
EINA_API Eina_List * eina_list_sort(Eina_List *list, unsigned int limit, Eina_Compare_Cb func)
Sorts a list according to the ordering func will return.
Definition: eina_list.c:1112
Warning
list must be a pointer to the first element of the list.

References _Eina_List::accounting, _Eina_List_Accounting::count, eina_list_nth_list(), EINA_SAFETY_ON_NULL_RETURN_VAL, _Eina_List_Accounting::last, _Eina_List::next, and _Eina_List::prev.

Referenced by ecore_file_ls(), eina_rectangle_pool_request(), elm_theme_color_class_list(), and elm_theme_group_base_list().

◆ eina_list_shuffle()

EINA_API Eina_List * eina_list_shuffle ( Eina_List list,
Eina_Random_Cb  func 
)

Shuffles list.

Parameters
[in]listThe list handle to shuffle.
[in]funcA function pointer that can return an int between 2 inclusive values
Returns
The new head of list.

This function shuffles list. func is used to generate random list indexes within the range of unshuffled list items. If func is NULL, rand is used.

Note
in-place: This will change the given list, so you should now point to the new list head that is returned by this function.
Since
1.8
Warning
list must be a pointer to the first element of the list.

References _Eina_List::accounting, _Eina_List_Accounting::count, _Eina_List_Accounting::last, _Eina_List::next, and _Eina_List::prev.

◆ eina_list_merge()

EINA_API Eina_List * eina_list_merge ( Eina_List left,
Eina_List right 
)

Merges two list.

Parameters
[in]leftHead list to merge.
[in]rightTail list to merge.
Returns
A new merged list.

This function puts right at the end of left and returns the head.

Both left and right do not exist anymore after the merge.

Note
Merge cost is O(n), being n the size of the smallest list. This is due the need to fix accounting of that segment, making count and last access O(1).
Warning
list must be a pointer to the first element of the list.

References _Eina_List::accounting, _Eina_List_Accounting::count, _Eina_List_Accounting::last, _Eina_List::next, and _Eina_List::prev.

Referenced by eina_file_flush(), and evas_textblock_cursor_range_simple_geometry_get().

◆ eina_list_sorted_merge()

EINA_API Eina_List * eina_list_sorted_merge ( Eina_List left,
Eina_List right,
Eina_Compare_Cb  func 
)

Merges two sorted list according to the ordering func will return.

Parameters
[in]leftFirst list to merge.
[in]rightSecond list to merge.
[in]funcA function pointer that can handle comparing the list data nodes.
Returns
A new sorted list.

This function compares the head of left and right, and choose the smallest one to be head of the returned list. It will continue this process for all entry of both list.

Both left and right lists are not valid anymore after the merge and should not be used. If func is NULL, it will return NULL.

Example:

int
sort_cb(void *d1, void *d2)
{
const char *txt = NULL;
const char *txt2 = NULL;
if(!d1) return(1);
if(!d2) return(-1);
return(strcmp((const char*)d1, (const char*)d2));
}
extern Eina_List *sorted1;
extern Eina_List *sorted2;
list = eina_list_sorted_merge(sorted1, sorted2, sort_cb);
EINA_API Eina_List * eina_list_sorted_merge(Eina_List *left, Eina_List *right, Eina_Compare_Cb func)
Merges two sorted list according to the ordering func will return.
Definition: eina_list.c:1362
Warning
list must be a pointer to the first element of the list.

References _Eina_List::accounting, _Eina_List_Accounting::count, _Eina_List::data, EINA_SAFETY_ON_NULL_RETURN_VAL, _Eina_List_Accounting::last, _Eina_List::next, and _Eina_List::prev.

◆ eina_list_split_list()

EINA_API Eina_List * eina_list_split_list ( Eina_List list,
Eina_List relative,
Eina_List **  right 
)

Splits a list into 2 lists.

Parameters
[in]listList to split.
[in]relativeThe list will be split after relative.
[out]rightThe head of the new right list.
Returns
The new left list

This function splits list into two lists ( left and right ) after the node relative. Relative will become the last node of the left list. If list or right are NULL list is returns. If relative is NULL right is set to list and NULL is returns. If relative is the last node of list list is returns and right is set to NULL.

list does not exist anymore after the split.

Warning
list must be a pointer to the first element of the list.

References _Eina_List::accounting, _Eina_List_Accounting::count, eina_list_last(), eina_list_next(), _Eina_List_Accounting::last, _Eina_List::next, and _Eina_List::prev.

◆ eina_list_search_sorted_near_list()

EINA_API Eina_List * eina_list_search_sorted_near_list ( const Eina_List list,
Eina_Compare_Cb  func,
const void *  data,
int *  result_cmp 
)

Returns node nearest to data from the sorted list.

Parameters
[in]listThe list to search for data, must be sorted.
[in]funcA function pointer that can handle comparing the list data nodes.
[in]datareference value to search.
[out]result_cmpIf provided returns the result of func(node->data, data) node being the last (returned) node. If node was found (exact match), then it is 0. If returned node is smaller than requested data, it is less than 0 and if it's bigger it's greater than 0. It is the last value returned by func().
Returns
The nearest node, NULL if not found.

This function searches for a node containing data as its data in list, if such a node exists it will be returned and result_cmp will be 0. If the data of no node in list is equal to data, the node with the nearest value to that will be returned and result_cmp will be the return value of func with data and the returned node's data as arguments.

This function is useful for inserting an element in the list only in case it isn't already present in the list, the naive way of doing this would be:

void *ptr = eina_list_data_find(list, "my data");
if (!ptr)
eina_list_sorted_insert(list, "my data");
EINA_API Eina_List * eina_list_sorted_insert(Eina_List *list, Eina_Compare_Cb func, const void *data)
Inserts a new node into a sorted list.
Definition: eina_list.c:757

However this has the downside of walking through the list twice, once to check if the data is already present and another to insert the element in the correct position. This can be done more efficiently:

int cmp_result;
l = eina_list_search_sorted_near_list(list, cmp_func, "my data",
&cmp_result);
if (cmp_result > 0)
list = eina_list_prepend_relative_list(list, "my data", l);
else if (cmp_result < 0)
list = eina_list_append_relative_list(list, "my data", l);
EINA_API Eina_List * eina_list_search_sorted_near_list(const Eina_List *list, Eina_Compare_Cb func, const void *data, int *result_cmp)
Returns node nearest to data from the sorted list.
Definition: eina_list.c:1439
EINA_API Eina_List * eina_list_append_relative_list(Eina_List *list, const void *data, Eina_List *relative)
Appends a list node to a linked list after the specified member.
Definition: eina_list.c:670
EINA_API Eina_List * eina_list_prepend_relative_list(Eina_List *list, const void *data, Eina_List *relative)
Prepends a list node to a linked list before the specified member.
Definition: eina_list.c:724

If cmp_result is 0 the element is already in the list and we need not insert it, if cmp_result is greater than zero "my @a data" needs to come after l (the nearest node present), if less than zero before.

Note
O(log2(n)) average/worst case performance, for 1,000,000 elements it will do a maximum of 20 comparisons. This is much faster than the 1,000,000 comparisons made naively walking the list from head to tail, so depending on the number of searches and insertions, it may be worth to eina_list_sort() the list and do the searches later. As lists do not have O(1) access time, walking to the correct node can be costly, consider worst case to be almost O(n) pointer dereference (list walk).
Warning
list must be a pointer to the first element of the list.
See also
eina_list_search_sorted_list()
eina_list_sort()
eina_list_sorted_merge()

References _Eina_List::accounting, _Eina_List_Accounting::count, _Eina_List::data, _Eina_List_Accounting::last, and _Eina_List::next.

Referenced by eina_list_search_sorted_list(), and eina_list_sorted_insert().

◆ eina_list_search_sorted_list()

EINA_API Eina_List * eina_list_search_sorted_list ( const Eina_List list,
Eina_Compare_Cb  func,
const void *  data 
)

Returns node if data is in the sorted list.

Parameters
[in]listThe list to search for data, must be sorted.
[in]funcA function pointer that can handle comparing the list data nodes.
[in]datareference value to search.
Returns
The node if func(node->data, data) == 0, NULL if not found.

This can be used to check if some value is inside the list and get the container node in this case. It should be used when list is known to be sorted as it will do binary search for results.

Example: imagine user gives a string, you check if it's in the list before duplicating its contents.

Note
O(log2(n)) average/worst case performance, for 1,000,000 elements it will do a maximum of 20 comparisons. This is much faster than the 1,000,000 comparisons made by eina_list_search_unsorted_list(), so depending on the number of searches and insertions, it may be worth to eina_list_sort() the list and do the searches later. As said in eina_list_search_sorted_near_list(), lists do not have O(1) access time, so walking to the correct node can be costly, consider worst case to be almost O(n) pointer dereference (list walk).
Warning
list must be a pointer to the first element of the list.
See also
eina_list_search_sorted()
eina_list_sort()
eina_list_sorted_merge()
eina_list_search_unsorted_list()
eina_list_search_sorted_near_list()

References eina_list_search_sorted_near_list().

Referenced by eina_list_search_sorted().

◆ eina_list_search_sorted()

EINA_API void * eina_list_search_sorted ( const Eina_List list,
Eina_Compare_Cb  func,
const void *  data 
)

Returns node data if it is in the sorted list.

Parameters
[in]listThe list to search for data, must be sorted.
[in]funcA function pointer that can handle comparing the list data nodes.
[in]datareference value to search.
Returns
The node value (node->data) if func(node->data, data) == 0, NULL if not found.

This can be used to check if some value is inside the list and get the existing instance in this case. It should be used when list is known to be sorted as it will do binary search for results.

Example: imagine user gives a string, you check if it's in the list before duplicating its contents.

Note
O(log2(n)) average/worst case performance, for 1,000,000 elements it will do a maximum of 20 comparisons. This is much faster than the 1,000,000 comparisons made by eina_list_search_unsorted(), so depending on the number of searches and insertions, it may be worth to eina_list_sort() the list and do the searches later. As said in eina_list_search_sorted_near_list(), lists do not have O(1) access time, so walking to the correct node can be costly, consider worst case to be almost O(n) pointer dereference (list walk).
Warning
list must be a pointer to the first element of the list.
See also
eina_list_search_sorted_list()
eina_list_sort()
eina_list_sorted_merge()
eina_list_search_unsorted_list()

References eina_list_data_get(), and eina_list_search_sorted_list().

◆ eina_list_search_unsorted_list()

EINA_API Eina_List * eina_list_search_unsorted_list ( const Eina_List list,
Eina_Compare_Cb  func,
const void *  data 
)

Returns node if data is in the unsorted list.

Parameters
[in]listThe list to search for data, may be unsorted.
[in]funcA function pointer that can handle comparing the list data nodes.
[in]datareference value to search.
Returns
The node if func(node->data, data) == 0, NULL if not found.

This can be used to check if some value is inside the list and get the container node in this case.

Example: imagine user gives a string, you check if it's in the list before duplicating its contents.

Note
this is expensive and may walk the whole list, it's order-N, that is for 1,000,000 elements list it may walk and compare 1,000,000 nodes.
Warning
list must be a pointer to the first element of the list.
See also
eina_list_search_sorted_list()
eina_list_search_unsorted()

References EINA_LIST_FOREACH.

Referenced by eina_list_search_unsorted().

◆ eina_list_search_unsorted()

EINA_API void * eina_list_search_unsorted ( const Eina_List list,
Eina_Compare_Cb  func,
const void *  data 
)

Returns node data if it is in the unsorted list.

Parameters
[in]listThe list to search for data, may be unsorted.
[in]funcA function pointer that can handle comparing the list data nodes.
[in]datareference value to search.
Returns
The node value (node->data) if func(node->data, data) == 0, NULL if not found.

This can be used to check if some value is inside the list and get the existing instance in this case.

Example: imagine user gives a string, you check if it's in the list before duplicating its contents.

Note
this is expensive and may walk the whole list, it's order-N, that is, for 1,000,000 elements list it may walk and compare 1,000,000 nodes.
Warning
list must be a pointer to the first element of the list.
See also
eina_list_search_sorted()
eina_list_search_unsorted_list()

References eina_list_data_get(), and eina_list_search_unsorted_list().

Referenced by efreet_desktop_category_add(), efreet_desktop_category_del(), efreet_menu_desktop_remove(), elm_drag_item_container_add(), and elm_drop_item_container_add().

◆ eina_list_last()

static Eina_List * eina_list_last ( const Eina_List list)
inlinestatic

Gets the last list node in the list.

Parameters
[in]listThe list to get the last list node from.
Returns
The last list node in the list.

This function returns the last list node in the list list. If list is NULL or empty, NULL is returned.

This is a order-1 operation (it takes the same short time regardless of the length of the list).

Warning
list must be a pointer to the first element of the list.
Examples
eina_list_04.c.

Referenced by eina_list_iterator_reversed_new(), and eina_list_split_list().

◆ eina_list_next()

static Eina_List * eina_list_next ( const Eina_List list)
inlinestatic

Gets the next list node after the specified list node.

Parameters
[in]listThe list node to get the next list node from
Returns
The next list node on success, NULL otherwise.

This function returns the next list node after the current one in list. It is equivalent to list->next. If list is NULL or if no next list node exists, it returns NULL.

Warning
list must be a pointer to the first element of the list.
Examples
eina_list_04.c.

Referenced by eet_eina_stream_data_descriptor_class_set(), eina_list_split_list(), and evas_textblock_node_format_remove_pair().

◆ eina_list_prev()

static Eina_List * eina_list_prev ( const Eina_List list)
inlinestatic

Gets the list node prior to the specified list node.

Parameters
[in]listThe list node to get the previous list node from.
Returns
The previous list node on success, NULL otherwise.

This function returns the previous list node before the current one in list. It is equivalent to list->prev. If list is NULL or if no previous list node exists, it returns NULL.

Warning
list must be a pointer to the first element of the list.
Examples
eina_list_04.c.

◆ eina_list_data_get()

static void * eina_list_data_get ( const Eina_List list)
inlinestatic

Gets the list node data member.

Parameters
[in]listThe list node to get the data member of.
Returns
The data member from the list node.

This function returns the data member of the specified list node list. It is equivalent to list->data. If list is NULL, this function returns NULL.

Warning
list must be a pointer to the first element of the list.
Examples
box_example_02.c, eina_list_04.c, menu_example_01.c, and slideshow_example.c.

Referenced by ecore_wl2_window_output_find(), edje_edit_limits_list_free(), edje_edit_program_afters_clear(), edje_edit_program_targets_clear(), edje_edit_state_name_set(), edje_edit_string_list_free(), edje_file_collection_list_free(), eet_eina_stream_data_descriptor_class_set(), eina_list_search_sorted(), eina_list_search_unsorted(), elm_drop_target_del(), elm_transit_go(), evas_engine_info_get(), evas_engine_info_set(), and evas_output_size_set().

◆ eina_list_data_set()

static void * eina_list_data_set ( Eina_List list,
const void *  data 
)
inlinestatic

Sets the list node data member.

Parameters
[in,out]listThe list node to set the data member of.
[in]dataThe data to be set.
Returns
The previous data value.

This function sets the data member data of the specified list node list. It returns the previous data of the node. If list is NULL, this function returns NULL.

Warning
list must be a pointer to the first element of the list.
Examples
eina_list_03.c.

◆ eina_list_count()

static unsigned int eina_list_count ( const Eina_List list)
inlinestatic

Gets the count of the number of items in a list.

Parameters
[in]listThe list whose count to return.
Returns
The number of members in the list.

This function returns the quantity of members that list contains. If the list is NULL, 0 is returned.

NB: This is an order-1 operation and takes the same time regardless of the length of the list.

Warning
list must be a pointer to the first element of the list.
Examples
ecore_con_server_simple_example.c, ecore_thread_example.c, edje-box2.c, eet-data-file_descriptor_01.c, eet-data-file_descriptor_02.c, eina_inlist_02.c, eina_list_03.c, emotion_test_main.c, evas-box.c, genlist_example_02.c, and genlist_example_05.c.

Referenced by ecore_drm2_outputs_create(), ecore_drm_inputs_device_axis_size_set(), ecore_file_ls(), ecore_thread_pending_feedback_get(), ecore_thread_pending_get(), ecore_thread_pending_total_get(), edje_edit_program_after_insert_at(), edje_edit_program_target_insert_at(), edje_edit_state_name_set(), eet_node_var_array_new(), efreet_desktop_category_count_get(), efreet_desktop_type_add(), elm_radio_group_add(), elput_input_pointer_xy_set(), ethumb_client_thumb_exists_cancel(), and evas_touch_point_list_count().

◆ eina_list_last_data_get()

static void * eina_list_last_data_get ( const Eina_List list)
inlinestatic

Returns the last list node's data.

Parameters
[in]listThe list.
Returns
The node's data, or NULL on being passed a NULL pointer

This function is a shortcut for typing eina_list_data_get(eina_list_last())

Since
1.8

◆ eina_list_iterator_new()

EINA_API Eina_Iterator * eina_list_iterator_new ( const Eina_List list)

Returns a new iterator associated with a list.

Parameters
[in]listThe list.
Returns
A new iterator, or NULL on memory allocation failure.

This function returns a newly allocated iterator associated with list. If list is NULL or the count member of list is less than or equal to 0, this function still returns a valid iterator that will always return false on eina_iterator_next(), thus keeping API sane.

Warning
list must be a pointer to the first element of the list.
if the list structure changes then the iterator becomes invalid! That is, if you add or remove nodes this iterator behavior is undefined and your program may crash!

References EINA_MAGIC_SET, FUNC_ITERATOR_FREE, FUNC_ITERATOR_GET_CONTAINER, and FUNC_ITERATOR_NEXT.

Referenced by ecore_win32_monitors_get().

◆ eina_list_iterator_reversed_new()

EINA_API Eina_Iterator * eina_list_iterator_reversed_new ( const Eina_List list)

Returns a new reversed iterator associated with a list.

Parameters
[in]listThe list.
Returns
A new iterator, or NULL on memory allocation failure.

This function returns a newly allocated iterator associated with list. If list is NULL or the count member of list is less than or equal to 0, this function still returns a valid iterator that will always return false on eina_iterator_next(), thus keeping API sane.

Unlike eina_list_iterator_new(), this will walk the list backwards.

Warning
list must be a pointer to the first element of the list.
if the list structure changes then the iterator becomes invalid! That is, if you add or remove nodes this iterator behavior is undefined and your program may crash!

References eina_list_last(), EINA_MAGIC_SET, FUNC_ITERATOR_FREE, FUNC_ITERATOR_GET_CONTAINER, and FUNC_ITERATOR_NEXT.

◆ eina_list_accessor_new()

EINA_API Eina_Accessor * eina_list_accessor_new ( const Eina_List list)

Returns a new accessor associated with a list.

Parameters
[in]listThe list.
Returns
A new accessor, or NULL on error.

This function returns a newly allocated accessor associated with list. If list is NULL or the count member of list is less or equal than 0, this function returns NULL. If the memory can not be allocated, NULL is returned; otherwise, a valid accessor is returned.

Warning
list must be a pointer to the first element of the list.

References EINA_MAGIC_SET, EINA_SAFETY_ON_NULL_RETURN_VAL, FUNC_ACCESSOR_CLONE, FUNC_ACCESSOR_FREE, FUNC_ACCESSOR_GET_AT, and FUNC_ACCESSOR_GET_CONTAINER.

◆ eina_list_data_idx()

EINA_API int eina_list_data_idx ( const Eina_List list,
void *  data 
)

Finds the member of the list and returns the index.

Parameters
[in]listThe list.
[in]dataThe data member.
Returns
The index of data member if found, -1 otherwise.

This function searches in list from beginning to end for the first member whose data pointer is data. If it is found, the index of the data will be returned, otherwise -1 will be returned.

Warning
list must be a pointer to the first element of the list.
Since
1.14

References EINA_LIST_FOREACH.