| 1 | #include <sys/queue.h>
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| 2 | #include <assert.h>
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| 3 | #include <stddef.h>
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| 4 | #include <stdbool.h>
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| 5 |
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| 6 | #define HEADNAME_(S) S ## Head
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| 7 |
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| 8 | #define BFX_INTRUSION(S) LIST_ENTRY(S) xx;
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| 9 | #define BFX_EXTRUSION_DECL(S)
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| 10 | #define BFX_EXTRUSION_FOLLOWUP(S) LIST_HEAD(HEADNAME_(S), S);
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| 11 | #define BFX_LIST_HEAD_T(S) struct HEADNAME_(S)
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| 12 | #define BFX_LISTED_ELEM_T(S) S*
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| 13 |
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| 14 | #define BFX_INSERT_FIRST(S, lst, item) ({LIST_INSERT_HEAD(&lst, &item, xx); &item;})
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| 15 | #define BFX_INSERT_LAST(S, lst, item) assert(false&&"unimplemented INSERT_LAST on lq-list")
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| 16 | #define BFX_INSERT_BEFORE(S, lst, item, refIter) ({LIST_INSERT_BEFORE(refIter, &item, xx); &item;})
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| 17 | #define BFX_INSERT_AFTER(S, lst, item, refIter) ({LIST_INSERT_AFTER(refIter, &item, xx); &item;})
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| 18 | #define BFX_REMOVE_FIRST(S, lst) ({ S * first = LIST_FIRST( &lst ); LIST_REMOVE( first, xx ); })
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| 19 | #define BFX_REMOVE_LAST(S, lst) assert(false&&"unimplemented REMOVE_LAST on lq-list")
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| 20 | #define BFX_REMOVE_HERE(S, lst, refIter) LIST_REMOVE( refIter, xx )
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| 21 | #define BFX_INIT(S, lst) LIST_INIT(&lst);
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| 22 |
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| 23 | #define BFX_GET_AFTER(S, lst, iter) LIST_NEXT(iter, xx)
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| 24 | #define BFX_GET_BEFORE(S, lst, iter) HACK_UNSUPPORTED_PREV(S, lst, iter, xx)
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| 25 | #define BFX_IS_VALID_POS(S, lst, iter) ((iter)!=NULL)
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| 26 | #define BFX_DEREF_POS(S, lst, iter) (iter)
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| 27 |
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| 28 | #define HACK_UNSUPPORTED_PREV(S, lst, iter, NAME) ({ \
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| 29 | S * answer = NULL; \
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| 30 | S ** linkAtMe = (iter)->NAME.le_prev; \
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| 31 | if ( &(lst) != (BFX_LIST_HEAD_T(S)*)linkAtMe ) { \
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| 32 | answer = (S*)( (char*)linkAtMe - offsetof(S, NAME) ); \
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| 33 | } \
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| 34 | answer; \
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| 35 | })
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| 36 |
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| 37 | #if 0
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| 38 | void bobs_moveNext() { observedItem = ((observedItem)->xx.le_next); }
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| 39 | struct { struct B_UserItem *le_next; struct B_UserItem **le_prev; } xx;
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| 40 | struct { struct B_UserItem *tqe_next; struct B_UserItem * *tqe_prev; } xx;
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| 41 |
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| 42 | void bobs_movePrev() {
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| 43 | observedItem = (*(((struct B_UserItemHead *)((observedItem)->xx.tqe_prev))->tqh_last)); }
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| 44 |
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| 45 | #endif
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