transmission/libtransmission/list.h

103 lines
2.9 KiB
C

/*
* This file Copyright (C) 2007-2014 Mnemosyne LLC
*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
*
*/
#pragma once
#ifndef __TRANSMISSION__
#error only libtransmission should #include this header.
#endif
/**
* @addtogroup utils Utilities
* @{
*/
#include "transmission.h" /* inline */
/** @brief simple list structure similar to glib's GList */
typedef struct tr_list
{
void* data;
struct tr_list* next;
struct tr_list* prev;
}
tr_list;
typedef int (* TrListCompareFunc)(void const* a, void const* b);
typedef void (* TrListForeachFunc)(void*);
/**
* @brief return the number of items in the list
* @return the number of items in the list
*/
int tr_list_size(tr_list const* list);
/**
* @brief free the specified list and set its pointer to NULL
* @param list pointer to the list to be freed
* @param func optional function to invoke on each item in the list
*/
void tr_list_free(tr_list** list, TrListForeachFunc data_free_func);
/**
* @brief append an item to the specified list
* @param list pointer to the list
* @param item the item to append
*/
void tr_list_append(tr_list** list, void* data);
/**
* @brief prepend an item to the specified list
* @param list pointer to the list
* @param item the item to prepend
*/
void tr_list_prepend(tr_list** list, void* data);
/**
* @brief remove the next item in the list
* @return the next item in the list, or NULL if the list is empty
* @param list pointer to the list
*/
void* tr_list_pop_front(tr_list** list);
/**
* @brief remove the list's node that contains the specified data pointer
* @param list pointer to the list
* @param data data to remove
* @return the removed data pointer, or NULL if no match was found
*/
void* tr_list_remove_data(tr_list** list, void const* data);
/**
* @brief remove the list's node that compares equal to "b" when compared with "compare_func"
* @param list pointer to the list
* @param b the comparison key
* @param compare_func the comparison function. The arguments passed to it will be the list's pointers and the comparison key "b"
* @return the removed data pointer, or NULL if no match was found
*/
void* tr_list_remove(tr_list** list, void const* b, TrListCompareFunc compare_func);
/**
* @brief find the list node whose data that compares equal to "b" when compared with "compare_func"
* @param list pointer to the list
* @param b the comparison key
* @param compare_func the comparison function. The arguments passed to it will be the list's pointers and the comparison key "b"
* @return the matching list node, or NULL if not match was found
*/
tr_list* tr_list_find(tr_list* list, void const* b, TrListCompareFunc compare_func);
/**
* @brief Insert in an ordered list
* @param list pointer to the list
* @param item the item to be inserted
* @param compare the comparison function.
*/
void tr_list_insert_sorted(tr_list** list, void* data, TrListCompareFunc compare);
/* @} */