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GList: Some further documentation and formatting tweaks
This commit is contained in:
Matthias Clasen
parent
86de6f0ebc
commit
a918519328
247
glib/glist.c
247
glib/glist.c
@ -47,15 +47,15 @@
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* Each element in the list contains a piece of data, together with
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* pointers which link to the previous and next elements in the list.
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* Using these pointers it is possible to move through the list in both
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* directions (unlike the <link
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* linkend="glib-Singly-Linked-Lists">Singly-Linked Lists</link> which
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* directions (unlike the singly-linked <link
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* linkend="glib-Singly-Linked-Lists">#GSList</link> which
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* only allows movement through the list in the forward direction).
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*
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* The double linked list does not keep track of the number of items
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* and does not keep track of both the start and end of the list. If
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* you want fast access to both the start and the end of the list,
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* and/or the number of items in the list, use <link
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* linkend="glib-Double-ended-Queues.html">Double ended Queues</link>.
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* and/or the number of items in the list, use a
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* <link linkend="glib-Double-ended-Queues">GQueue</link> instead.
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*
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* The data contained in each element can be either integer values, by
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* using one of the <link linkend="glib-Type-Conversion-Macros">Type
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@ -70,46 +70,52 @@
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* elements return the new start of the list, which may have changed.
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*
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* There is no function to create a #GList. %NULL is considered to be
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* the empty list so you simply set a #GList* to %NULL.
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* a valid, empty list so you simply set a #GList* to %NULL to initialize
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* it.
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*
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* To add elements, use g_list_append(), g_list_prepend(),
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* g_list_insert() and g_list_insert_sorted().
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*
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* To visit all elements in the list, use a loop over the list:
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* |[
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* GList *tmplist;
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* for (tmplist = list; tmplist; tmplist = tmplist->next) {
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* /* do something with tmplist->data */
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* GList *l;
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* for (l = list; l != NULL; l = l->next)
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* {
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* /* do something with l->data */
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* }
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* ]|
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*
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* To call a function for each element in the list use g_list_foreach().
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* To call a function for each element in the list, use g_list_foreach().
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*
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* To loop over the list and modify it (e.g. remove a certain element)
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* a while loop is more appropriate, for example:
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* |[
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* GList *tmplist = list;
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* while (tmplist) {
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* GList *nextlist = tmplist->next;
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* if (specialcondition) {
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* /* possibly free tmplist->data */
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* list = g_list_delete_link (list, tmplist);
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* GList *l = list;
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* while (l != NULL)
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* {
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* GList *next = l->next;
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* if (should_be_removed (l))
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* {
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* /* possibly free l->data */
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* list = g_list_delete_link (list, l);
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* }
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* tmplist = nextlist;
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* l = next;
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* }
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* ]|
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*
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* To remove elements, use g_list_remove().
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*
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* To find elements in the list use g_list_first(), g_list_last(),
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* g_list_next(), g_list_previous(), g_list_nth(), g_list_nth_data(),
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* To navigate in a list, use g_list_first(), g_list_last(),
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* g_list_next(), g_list_previous().
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*
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* To find elements in the list use g_list_nth(), g_list_nth_data(),
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* g_list_find() and g_list_find_custom().
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*
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* To find the index of an element use g_list_position() and
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* g_list_index().
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*
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* To free the entire list, use g_list_free().
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**/
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* To free the entire list, use g_list_free() or g_list_free_full().
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*/
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/**
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* GList:
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@ -117,29 +123,33 @@
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* of data, or any integer value using the <link
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* linkend="glib-Type-Conversion-Macros">Type Conversion
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* Macros</link>.
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* @next: contains the link to the next element in the list.
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* @prev: contains the link to the previous element in the list.
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* @next: contains the link to the next element in the list
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* @prev: contains the link to the previous element in the list
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*
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* The #GList struct is used for each element in a doubly-linked list.
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**/
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/**
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* g_list_previous:
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* @list: an element in a #GList.
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* @list: an element in a #GList
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*
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* A convenience macro to get the previous element in a #GList.
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* Note that it is considered perfectly acceptable to access
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* @list->previous directly.
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*
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* Returns: the previous element, or %NULL if there are no previous
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* elements.
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* elements
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**/
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/**
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* g_list_next:
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* @list: an element in a #GList.
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* @list: an element in a #GList
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*
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* A convenience macro to get the next element in a #GList.
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* Note that it is considered perfectly acceptable to access
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* @list->next directly.
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*
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* Returns: the next element, or %NULL if there are no more elements.
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* Returns: the next element, or %NULL if there are no more elements
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**/
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#define _g_list_alloc() g_slice_new (GList)
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@ -153,9 +163,9 @@
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* g_list_append(), g_list_prepend(), g_list_insert() and
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* g_list_insert_sorted() and so is rarely used on its own.
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*
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* Returns: a pointer to the newly-allocated #GList element.
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* Returns: a pointer to the newly-allocated #GList element
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**/
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GList*
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GList *
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g_list_alloc (void)
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{
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return _g_list_alloc0 ();
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@ -166,7 +176,7 @@ g_list_alloc (void)
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* @list: a #GList
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*
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* Frees all of the memory used by a #GList.
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* The freed elements are returned to the slice allocator.
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* The freed elements are returned to the slice allocator
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*
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* <note><para>
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* If list elements contain dynamically-allocated memory,
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@ -203,8 +213,8 @@ g_list_free_1 (GList *list)
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* @list: a pointer to a #GList
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* @free_func: the function to be called to free each element's data
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*
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* Convenience method, which frees all the memory used by a #GList, and
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* calls the specified destroy function on every element's data.
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* Convenience method, which frees all the memory used by a #GList,
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* and calls @free_func on every element's data.
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*
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* Since: 2.28
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*/
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@ -223,26 +233,21 @@ g_list_free_full (GList *list,
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*
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* Adds a new element on to the end of the list.
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*
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* <note><para>
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* The return value is either @list, or the new start of the list if @list
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* was %NULL; make sure you store the new value.
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* </para></note>
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* Note that the return value is the new start of the list,
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* if @list was empty; make sure you store the new value.
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*
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* <note><para>
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* Note that g_list_append() has to traverse the entire list
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* to find the end, which is inefficient when adding multiple
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* elements. A common idiom to avoid the inefficiency is to use
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* g_list_prepend() and reverse the list with g_list_reverse()
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* when all elements have been added.
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* </para></note>
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* g_list_append() has to traverse the entire list to find the end,
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* which is inefficient when adding multiple elements. A common idiom
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* to avoid the inefficiency is to use g_list_prepend() and reverse
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* the list with g_list_reverse() when all elements have been added.
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*
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* |[
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* /* Notice that these are initialized to the empty list. */
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* GList *list = NULL, *number_list = NULL;
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* GList *string_list = NULL, *number_list = NULL;
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*
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* /* This is a list of strings. */
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* list = g_list_append (list, "first");
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* list = g_list_append (list, "second");
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* string_list = g_list_append (string_list, "first");
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* string_list = g_list_append (string_list, "second");
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*
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* /* This is a list of integers. */
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* number_list = g_list_append (number_list, GINT_TO_POINTER (27));
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@ -251,7 +256,7 @@ g_list_free_full (GList *list,
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*
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* Returns: either @list or the new start of the #GList if @list was %NULL
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*/
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GList*
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GList *
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g_list_append (GList *list,
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gpointer data)
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{
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@ -285,14 +290,13 @@ g_list_append (GList *list,
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*
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* Prepends a new element on to the start of the list.
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*
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* <note><para>
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* The return value is the new start of the list, which
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* will have changed, so make sure you store the new value.
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* </para></note>
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* Note that the return value is the new start of the list,
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* which will have changed, so make sure you store the new value.
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*
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* |[
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* /* Notice that it is initialized to the empty list. */
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* GList *list = NULL;
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*
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* list = g_list_prepend (list, "last");
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* list = g_list_prepend (list, "first");
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* ]|
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@ -303,9 +307,9 @@ g_list_append (GList *list,
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* </para></note>
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*
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* Returns: a pointer to the newly prepended element, which is the new
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* start of the #GList.
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* start of the #GList
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*/
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GList*
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GList *
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g_list_prepend (GList *list,
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gpointer data)
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{
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@ -340,7 +344,7 @@ g_list_prepend (GList *list,
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*
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* Returns: the (possibly changed) start of the #GList
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*/
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GList*
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GList *
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g_list_insert (GList *list,
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gpointer data,
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gint position)
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@ -378,7 +382,7 @@ g_list_insert (GList *list,
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*
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* Returns: the (possibly changed) start of the #GList
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*/
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GList*
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GList *
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g_list_insert_before (GList *list,
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GList *sibling,
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gpointer data)
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@ -430,8 +434,8 @@ g_list_insert_before (GList *list,
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/**
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* g_list_concat:
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* @list1: a #GList, this must point to the top of the list
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* @list2: the #GList to add to the end of the first #GList, this must point
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* to the top of the list
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* @list2: the #GList to add to the end of the first #GList,
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* this must point to the top of the list
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*
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* Adds the second #GList onto the end of the first #GList.
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* Note that the elements of the second #GList are not copied.
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@ -447,7 +451,8 @@ g_list_insert_before (GList *list,
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* Returns: the start of the new #GList, which equals @list1 if not %NULL
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*/
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GList *
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g_list_concat (GList *list1, GList *list2)
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g_list_concat (GList *list1,
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GList *list2)
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{
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GList *tmp_list;
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@ -464,7 +469,7 @@ g_list_concat (GList *list1, GList *list2)
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return list1;
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}
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static inline GList*
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static inline GList *
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_g_list_remove_link (GList *list,
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GList *link)
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{
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@ -506,7 +511,7 @@ _g_list_remove_link (GList *list,
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*
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* Returns: the (possibly changed) start of the #GList
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*/
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GList*
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GList *
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g_list_remove (GList *list,
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gconstpointer data)
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{
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@ -540,7 +545,7 @@ g_list_remove (GList *list,
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*
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* Returns: the (possibly changed) start of the #GList
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*/
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GList*
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GList *
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g_list_remove_all (GList *list,
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gconstpointer data)
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{
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@ -577,9 +582,9 @@ g_list_remove_all (GList *list,
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* The removed element's prev and next links are set to %NULL, so
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* that it becomes a self-contained list with one element.
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*
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* This function is for example used to move an element in the list (see the
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* example at g_list_concat()) or to remove an element in the list before
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* freeing its data:
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* This function is for example used to move an element in the list
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* (see the example for g_list_concat()) or to remove an element in
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* the list before freeing its data:
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* |[
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* list = g_list_remove_link (list, llink);
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* free_some_data_that_may_access_the_list_again (llink->data);
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@ -588,7 +593,7 @@ g_list_remove_all (GList *list,
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*
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* Returns: the (possibly changed) start of the #GList
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*/
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GList*
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GList *
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g_list_remove_link (GList *list,
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GList *llink)
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{
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@ -606,7 +611,7 @@ g_list_remove_link (GList *list,
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*
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* Returns: the (possibly changed) start of the #GList
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*/
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GList*
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GList *
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g_list_delete_link (GList *list,
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GList *link_)
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{
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@ -631,7 +636,7 @@ g_list_delete_link (GList *list,
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*
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* Returns: the start of the new list that holds the same data as @list
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*/
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GList*
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GList *
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g_list_copy (GList *list)
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{
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return g_list_copy_deep (list, NULL, NULL);
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@ -641,16 +646,17 @@ g_list_copy (GList *list)
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* g_list_copy_deep:
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* @list: a #GList, this must point to the top of the list
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* @func: a copy function used to copy every element in the list
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* @user_data: user data passed to the copy function @func, or #NULL
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* @user_data: user data passed to the copy function @func, or %NULL
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*
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* Makes a full (deep) copy of a #GList.
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*
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* In contrast with g_list_copy(), this function uses @func to make a copy of
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* each list element, in addition to copying the list container itself.
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* In contrast with g_list_copy(), this function uses @func to make
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* a copy of each list element, in addition to copying the list
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* container itself.
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*
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* @func, as a #GCopyFunc, takes two arguments, the data to be copied and a user
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* pointer. It's safe to pass #NULL as user_data, if the copy function takes only
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* one argument.
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* @func, as a #GCopyFunc, takes two arguments, the data to be copied
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* and a @user_data pointer. It's safe to pass %NULL as user_data,
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* if the copy function takes only one argument.
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*
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* For instance, if @list holds a list of GObjects, you can do:
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* |[
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@ -663,12 +669,14 @@ g_list_copy (GList *list)
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* ]|
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*
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* Returns: the start of the new list that holds a full copy of @list,
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* use #g_list_free_full to free it
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* use g_list_free_full() to free it
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*
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* Since: 2.34
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*/
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GList*
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g_list_copy_deep (GList *list, GCopyFunc func, gpointer user_data)
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GList *
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g_list_copy_deep (GList *list,
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GCopyFunc func,
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gpointer user_data)
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{
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GList *new_list = NULL;
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@ -710,7 +718,7 @@ g_list_copy_deep (GList *list, GCopyFunc func, gpointer user_data)
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*
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* Returns: the start of the reversed #GList
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*/
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GList*
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GList *
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g_list_reverse (GList *list)
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{
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GList *last;
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@ -737,7 +745,7 @@ g_list_reverse (GList *list)
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* Returns: the element, or %NULL if the position is off
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* the end of the #GList
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*/
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GList*
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GList *
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g_list_nth (GList *list,
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guint n)
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{
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@ -757,7 +765,7 @@ g_list_nth (GList *list,
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* Returns: the element, or %NULL if the position is
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* off the end of the #GList
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*/
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GList*
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GList *
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g_list_nth_prev (GList *list,
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guint n)
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{
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@ -792,13 +800,11 @@ g_list_nth_data (GList *list,
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* @list: a #GList, this must point to the top of the list
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* @data: the element data to find
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*
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* Finds the element in a #GList which
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* contains the given data.
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* Finds the element in a #GList which contains the given data.
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*
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* Returns: the found #GList element,
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* or %NULL if it is not found
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* Returns: the found #GList element, or %NULL if it is not found
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*/
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GList*
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GList *
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g_list_find (GList *list,
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gconstpointer data)
|
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{
|
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@ -828,7 +834,7 @@ g_list_find (GList *list,
|
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*
|
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* Returns: the found #GList element, or %NULL if it is not found
|
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*/
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GList*
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GList *
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g_list_find_custom (GList *list,
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gconstpointer data,
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GCompareFunc func)
|
||||
@ -845,7 +851,6 @@ g_list_find_custom (GList *list,
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* g_list_position:
|
||||
* @list: a #GList, this must point to the top of the list
|
||||
@ -913,7 +918,7 @@ g_list_index (GList *list,
|
||||
* Returns: the last element in the #GList,
|
||||
* or %NULL if the #GList has no elements
|
||||
*/
|
||||
GList*
|
||||
GList *
|
||||
g_list_last (GList *list)
|
||||
{
|
||||
if (list)
|
||||
@ -934,7 +939,7 @@ g_list_last (GList *list)
|
||||
* Returns: the first element in the #GList,
|
||||
* or %NULL if the #GList has no elements
|
||||
*/
|
||||
GList*
|
||||
GList *
|
||||
g_list_first (GList *list)
|
||||
{
|
||||
if (list)
|
||||
@ -953,10 +958,9 @@ g_list_first (GList *list)
|
||||
* Gets the number of elements in a #GList.
|
||||
*
|
||||
* <note><para>
|
||||
* This function iterates over the whole list to
|
||||
* count its elements. Use <link
|
||||
* linkend="glib-Double-ended-Queues.html">Double ended Queues</link> instead
|
||||
* of a double linked list if you regularly need the number of items.
|
||||
* This function iterates over the whole list to count its elements.
|
||||
* Use a <link linkend="glib-Double-ended-Queues">GQueue</link> instead
|
||||
* of a GList if you regularly need the number of items.
|
||||
* </para></note>
|
||||
*
|
||||
* Returns: the number of elements in the #GList
|
||||
@ -986,13 +990,12 @@ g_list_length (GList *list)
|
||||
*/
|
||||
/**
|
||||
* GFunc:
|
||||
* @data: the element's data.
|
||||
* @user_data: user data passed to g_list_foreach() or
|
||||
* g_slist_foreach().
|
||||
* @data: the element's data
|
||||
* @user_data: user data passed to g_list_foreach() or g_slist_foreach()
|
||||
*
|
||||
* Specifies the type of functions passed to g_list_foreach() and
|
||||
* g_slist_foreach().
|
||||
**/
|
||||
*/
|
||||
void
|
||||
g_list_foreach (GList *list,
|
||||
GFunc func,
|
||||
@ -1060,8 +1063,8 @@ g_list_insert_sorted_real (GList *list,
|
||||
|
||||
/**
|
||||
* g_list_insert_sorted:
|
||||
* @list: a pointer to a #GList, this must point to the top of the already
|
||||
* sorted list
|
||||
* @list: a pointer to a #GList, this must point to the top of the
|
||||
* already sorted list
|
||||
* @data: the data for the new element
|
||||
* @func: the function to compare elements in the list. It should
|
||||
* return a number > 0 if the first parameter comes after the
|
||||
@ -1071,14 +1074,15 @@ g_list_insert_sorted_real (GList *list,
|
||||
* function to determine its position.
|
||||
*
|
||||
* <note><para>
|
||||
* If you are adding many new elements to a list, and the number of new
|
||||
* elements is much larger than the length of the list, use g_list_prepend()
|
||||
* to add the new items and sort the list afterwards with g_list_sort()
|
||||
* If you are adding many new elements to a list, and the number of
|
||||
* new elements is much larger than the length of the list, use
|
||||
* g_list_prepend() to add the new items and sort the list afterwards
|
||||
* with g_list_sort()
|
||||
* </para></note>
|
||||
*
|
||||
* Returns: the (possibly changed) start of the #GList
|
||||
*/
|
||||
GList*
|
||||
GList *
|
||||
g_list_insert_sorted (GList *list,
|
||||
gpointer data,
|
||||
GCompareFunc func)
|
||||
@ -1088,21 +1092,29 @@ g_list_insert_sorted (GList *list,
|
||||
|
||||
/**
|
||||
* g_list_insert_sorted_with_data:
|
||||
* @list: a pointer to a #GList, this must point to the top of the list
|
||||
* @list: a pointer to a #GList, this must point to the top of the
|
||||
* already sorted list
|
||||
* @data: the data for the new element
|
||||
* @func: the function to compare elements in the list.
|
||||
* It should return a number > 0 if the first parameter
|
||||
* comes after the second parameter in the sort order.
|
||||
* @user_data: user data to pass to comparison function.
|
||||
* @func: the function to compare elements in the list. It should
|
||||
* return a number > 0 if the first parameter comes after the
|
||||
* second parameter in the sort order.
|
||||
* @user_data: user data to pass to comparison function
|
||||
*
|
||||
* Inserts a new element into the list, using the given comparison
|
||||
* function to determine its position.
|
||||
*
|
||||
* <note><para>
|
||||
* If you are adding many new elements to a list, and the number of
|
||||
* new elements is much larger than the length of the list, use
|
||||
* g_list_prepend() to add the new items and sort the list afterwards
|
||||
* with g_list_sort()
|
||||
* </para></note>
|
||||
*
|
||||
* Returns: the (possibly changed) start of the #GList
|
||||
*
|
||||
* Since: 2.10
|
||||
*/
|
||||
GList*
|
||||
GList *
|
||||
g_list_insert_sorted_with_data (GList *list,
|
||||
gpointer data,
|
||||
GCompareDataFunc func,
|
||||
@ -1147,7 +1159,7 @@ g_list_sort_merge (GList *l1,
|
||||
return list.next;
|
||||
}
|
||||
|
||||
static GList*
|
||||
static GList *
|
||||
g_list_sort_real (GList *list,
|
||||
GFunc compare_func,
|
||||
gpointer user_data)
|
||||
@ -1193,8 +1205,8 @@ g_list_sort_real (GList *list,
|
||||
*/
|
||||
/**
|
||||
* GCompareFunc:
|
||||
* @a: a value.
|
||||
* @b: a value to compare with.
|
||||
* @a: a value
|
||||
* @b: a value to compare with
|
||||
*
|
||||
* Specifies the type of a comparison function used to compare two
|
||||
* values. The function should return a negative integer if the first
|
||||
@ -1202,14 +1214,13 @@ g_list_sort_real (GList *list,
|
||||
* integer if the first value comes after the second.
|
||||
*
|
||||
* Returns: negative value if @a < @b; zero if @a = @b; positive
|
||||
* value if @a > @b.
|
||||
**/
|
||||
* value if @a > @b
|
||||
*/
|
||||
GList *
|
||||
g_list_sort (GList *list,
|
||||
GCompareFunc compare_func)
|
||||
{
|
||||
return g_list_sort_real (list, (GFunc) compare_func, NULL);
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
@ -1225,9 +1236,9 @@ g_list_sort (GList *list,
|
||||
*/
|
||||
/**
|
||||
* GCompareDataFunc:
|
||||
* @a: a value.
|
||||
* @b: a value to compare with.
|
||||
* @user_data: user data to pass to comparison function.
|
||||
* @a: a value
|
||||
* @b: a value to compare with
|
||||
* @user_data: user data
|
||||
*
|
||||
* Specifies the type of a comparison function used to compare two
|
||||
* values. The function should return a negative integer if the first
|
||||
@ -1235,8 +1246,8 @@ g_list_sort (GList *list,
|
||||
* integer if the first value comes after the second.
|
||||
*
|
||||
* Returns: negative value if @a < @b; zero if @a = @b; positive
|
||||
* value if @a > @b.
|
||||
**/
|
||||
* value if @a > @b
|
||||
*/
|
||||
GList *
|
||||
g_list_sort_with_data (GList *list,
|
||||
GCompareDataFunc compare_func,
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user