mirror of
https://git.do.srb2.org/STJr/SRB2.git
synced 2024-12-22 18:51:33 +00:00
59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
// SONIC ROBO BLAST 2
|
|
//-----------------------------------------------------------------------------
|
|
// Copyright (C) 2005 by James Haley
|
|
// Copyright (C) 2005-2019 by Sonic Team Junior.
|
|
//
|
|
// This program is free software distributed under the
|
|
// terms of the GNU General Public License, version 2.
|
|
// See the 'LICENSE' file for more details.
|
|
//-----------------------------------------------------------------------------
|
|
/// \file m_dllist.h
|
|
/// \brief Generalized Double-linked List Routines
|
|
|
|
// haleyjd 08/05/05: This is Lee Killough's smart double-linked list
|
|
// implementation with pointer-to-pointer prev links, generalized to
|
|
// be able to work with any structure. This type of double-linked list
|
|
// can only be traversed from head to tail, but it treats all nodes
|
|
// uniformly even without the use of a dummy head node, and thus it is
|
|
// very efficient. These routines are inlined for maximum speed.
|
|
//
|
|
// Just put an mdllistitem_t as the first item in a structure and you
|
|
// can then cast a pointer to that structure to mdllistitem_t * and
|
|
// pass it to these routines. You are responsible for defining the
|
|
// pointer used as the head of the list.
|
|
|
|
#ifndef M_DLLIST_H__
|
|
#define M_DLLIST_H__
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma warning(disable : 4706)
|
|
#endif
|
|
|
|
typedef struct mdllistitem_s
|
|
{
|
|
struct mdllistitem_s *next;
|
|
struct mdllistitem_s **prev;
|
|
} mdllistitem_t;
|
|
|
|
FUNCINLINE static ATTRINLINE void M_DLListInsert(mdllistitem_t *item, mdllistitem_t **head)
|
|
{
|
|
mdllistitem_t *next = *head;
|
|
|
|
if ((item->next = next))
|
|
next->prev = &item->next;
|
|
item->prev = head;
|
|
*head = item;
|
|
}
|
|
|
|
FUNCINLINE static ATTRINLINE void M_DLListRemove(mdllistitem_t *item)
|
|
{
|
|
mdllistitem_t **prev = item->prev;
|
|
mdllistitem_t *next = item->next;
|
|
|
|
if ((*prev = next))
|
|
next->prev = prev;
|
|
}
|
|
|
|
#endif
|
|
|
|
// EOF
|