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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef __JAR_DS_h_
#define __JAR_DS_h_
/* Typedefs */
typedef struct ZZLinkStr ZZLink;
typedef struct ZZListStr ZZList;
/*
** Circular linked list. Each link contains a pointer to the object that
** is actually in the list.
*/
struct ZZLinkStr {
ZZLink *next;
ZZLink *prev;
JAR_Item *thing;
};
struct ZZListStr {
ZZLink link;
};
#define ZZ_InitList(lst) \
{ \
(lst)->link.next = &(lst)->link; \
(lst)->link.prev = &(lst)->link; \
(lst)->link.thing = 0; \
}
#define ZZ_ListEmpty(lst) ((lst)->link.next == &(lst)->link)
#define ZZ_ListHead(lst) ((lst)->link.next)
#define ZZ_ListTail(lst) ((lst)->link.prev)
#define ZZ_ListIterDone(lst, lnk) ((lnk) == &(lst)->link)
#define ZZ_AppendLink(lst, lnk) \
{ \
(lnk)->next = &(lst)->link; \
(lnk)->prev = (lst)->link.prev; \
(lst)->link.prev->next = (lnk); \
(lst)->link.prev = (lnk); \
}
#define ZZ_InsertLink(lst, lnk) \
{ \
(lnk)->next = (lst)->link.next; \
(lnk)->prev = &(lst)->link; \
(lst)->link.next->prev = (lnk); \
(lst)->link.next = (lnk); \
}
#define ZZ_RemoveLink(lnk) \
{ \
(lnk)->next->prev = (lnk)->prev; \
(lnk)->prev->next = (lnk)->next; \
(lnk)->next = 0; \
(lnk)->prev = 0; \
}
extern ZZLink *
ZZ_NewLink(JAR_Item *thing);
extern void
ZZ_DestroyLink(ZZLink *link);
extern ZZList *
ZZ_NewList(void);
extern void
ZZ_DestroyList(ZZList *list);
#endif /* __JAR_DS_h_ */
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