Adding element before current node

my add before current method is not working in the else part .It works when the iterator in the list is at the end but not when its not .Can anyone spot the problem with a little snippet of the code

Code:

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  list then add item to end of list */
void list_add_before_current(struct listset * p,char item){
   


  struct node * temp = (struct node*)malloc(sizeof (*temp));
 
    if(list_at_end(p)){
   
        temp->next=NULL;
        p->tail->next=temp;
        temp->key=item;
        temp->previous=p->tail;
        p->tail=temp;
       


 
    }
   
    else
    {
     
      temp->key=item;
      p->iterator->previous->next=temp;  //pointing my former previous node next  to my new node
      temp->next=p->iterator;
      p->iterator->previous=temp; //iterator previous now points to my new nod
      temp->previous = p->iterator->previous; // new node previous  points tom my currents iterator previous
      temp->next = p->iterator; //new node next points to my iterator


    }


}

int main(int argc, char** argv) {
    struct listset  *src1;
    src1=listset_new();
   
   
listset_add(src1, 3);
 listset_add(src1, 15);
listset_add(src1, 21);
 listset_add(src1, 11);
list_add_before_current(src1,5);

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i keep losing my head but i dont know why

Quote:

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Originally Posted by sigur47

i keep losing my head but i dont know why

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Y'know what... I know people who would *pay* for straight lines like that one :D

Executing these two lines in this order is probably a mistake:

Quote:

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Code:

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      p->iterator->previous=temp; //iterator previous now points to my new nod
      temp->previous = p->iterator->previous; // new node previous  points tom my currents iterator previous

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temp->previous now points at temp!

Quote:

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Originally Posted by iMalc

Executing these two lines in this order is probably a mistake:temp->previous now points at temp!

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hi thanks for the tip, i checked it and changed this to this but i am still having the same problem

Code:

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void list_add_before_current(struct listset * p,char item){
   
    struct node *e;
  struct node * temp = (struct node*)malloc(sizeof (*temp));
 
    if(list_at_end(p)){
   
        temp->next=NULL;
        p->tail->next=temp;
        temp->key=item;
        temp->previous=p->tail;
        p->tail=temp;
       


 
    }
  // else if(p->iterator->previous==NULL){
  //    temp->key=item;
  //    p->iterator->previous=temp;
    //    temp->next=p->iterator;
    //    p->head=temp;
  //    temp->previous=NULL;
  // }
    else
    {
     
    //  temp->key=item;
      //p->iterator->previous->next=temp;  //pointing my former previous node next  to my new node
    // temp->next=p->iterator;
    // p->iterator->previous=temp; //iterator previous now points to my new nod
      //temp->previous = p->iterator->previous; // new node previous  points tom my currents iterator previous
     
      // e=p->iterator->previous;
        temp->previous=p->iterator->previous;//de previous  points tom my currents iterator previous
        temp->key=item;
        p->iterator->previous->next=temp;  //pointing my former previous node next  to my new node
        temp->next=p->iterator; //new node next points to my iterator
        p->iterator->previous=temp; //iterator previous now points to my new node
       
       
    }


}

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