Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>
#include <bio.h>
#include <ndb.h>

/* remove a from t and free it */
Ndbtuple*
ndbdiscard(Ndbtuple *t, Ndbtuple *a)
{
        Ndbtuple *nt;

        /* unchain a */
        for(nt = t; nt != nil; nt = nt->entry){
                if(nt->line == a)
                        nt->line = a->line;
                if(nt->entry == a)
                        nt->entry = a->entry;
        }

        /* a may be start of chain */
        if(t == a)
                t = a->entry;

        /* free a */
        a->entry = nil;
        ndbfree(a);

        ndbsetmalloctag(t, getcallerpc(&t));
        return t;
}