1 d957951b 2005-02-11 devnull #include <u.h>
 2 d957951b 2005-02-11 devnull #include <libc.h>
 3 d957951b 2005-02-11 devnull #include <bio.h>
 4 d957951b 2005-02-11 devnull #include <ndb.h>
 5 d957951b 2005-02-11 devnull 
 6 d957951b 2005-02-11 devnull /* remove a from t and free it */
 7 d957951b 2005-02-11 devnull Ndbtuple*
 8 d957951b 2005-02-11 devnull ndbdiscard(Ndbtuple *t, Ndbtuple *a)
 9 d957951b 2005-02-11 devnull {
10 d957951b 2005-02-11 devnull 	Ndbtuple *nt;
11 d957951b 2005-02-11 devnull 
12 d957951b 2005-02-11 devnull 	/* unchain a */
13 d957951b 2005-02-11 devnull 	for(nt = t; nt != nil; nt = nt->entry){
14 d957951b 2005-02-11 devnull 		if(nt->line == a)
15 d957951b 2005-02-11 devnull 			nt->line = a->line;
16 d957951b 2005-02-11 devnull 		if(nt->entry == a)
17 d957951b 2005-02-11 devnull 			nt->entry = a->entry;
18 d957951b 2005-02-11 devnull 	}
19 d957951b 2005-02-11 devnull 
20 d957951b 2005-02-11 devnull 	/* a may be start of chain */
21 d957951b 2005-02-11 devnull 	if(t == a)
22 d957951b 2005-02-11 devnull 		t = a->entry;
23 d957951b 2005-02-11 devnull 
24 d957951b 2005-02-11 devnull 	/* free a */
25 d957951b 2005-02-11 devnull 	a->entry = nil;
26 d957951b 2005-02-11 devnull 	ndbfree(a);
27 d957951b 2005-02-11 devnull 
28 d957951b 2005-02-11 devnull 	return t;
29 d957951b 2005-02-11 devnull }