prev               18 bidlist.c        newnode->prev = blist->tail; 
prev               32 bidlist.c        bidnode* prev = node->prev;
prev               38 bidlist.c          next->prev = prev;
prev               40 bidlist.c          blist->tail = prev;
prev               42 bidlist.c        if(prev!= NULL){
prev               43 bidlist.c          prev->next = next;
prev                6 bidlist.h        struct bidnode* prev;