Gammon Forum

/* something along these lines */

typedef the_data THE_DATA;
struct the_data {
  // variables
};
struct char_data {
  THE_DATA *linklist;
};

THE_DATA *temp;
temp = ch->linklist
while ( temp != NULL )
  temp = temp->next;
temp = memoryallocation;
temp->value = 20;
/* this would put the value 20 into the last object in the 'linklist' found in 'ch'. */

THE_DATA * temp = ch->linklist;  // start (first element) of existing list
THE_DATA * new_item = malloc (sizeof THE_DATA);  // new element for list

new_item->value = 20;  // put data into new element
new_item->next = NULL;  // end of the list now

// now insert into list


if (temp == NULL)   // empty list is special case
  ch->linklist = new_item;
else
  {
  while ( temp->next != NULL )
    temp = temp->next;
  temp->next = new_item;  // put new_item at end of existing list
  }

/* struct char_data {
**   LL_DATA *linklist;  
*/ }

do_something ( CHAR_DATA *ch ) {
  LL_DATA *new_obj = malloc ( sizeof(LL_DATA) );
  LL_DATA *all_objs = ch->linklist;

  new_obj->value = 10;
  new_obj->next = NULL;

  if ( all_objs != NULL ) {
    while (all_objs->next != NULL) {
      all_objs = all_objs->next;
    }
    all_objs->next = new_obj;
  }
  else {
    all_objs = new_obj;
  }  

  return;
}

  else {
    all_objs = new_obj;
  }  

else
{
  ch->linklist = new_obj; /* make sure to set the pointer in the struct instead of the local one */
}

void do_something ( CHAR_DATA *ch, char* arg )
{
  LL_DATA *new_obj = malloc ( sizeof(LL_DATA) );

  new_obj->value = 10;

  /* add to list */
  new_obj->next = ch->linklist;
  ch->linklist = new_obj;

  return;
}

 /* in the char_data struct */
 LL_DATA* first_link;
 LL_DATA* last_link;

 /* in the LL_DATA struct */
 LL_DATA* next;
 LL_DATA* prev;

void do_something( CHAR_DATA *ch, char* arg )
{
  LL_DATA* data = malloc( sizeof(LL_DATA) );

  data->value = 10;

  LINK( data, ch->first_link, ch->last_link, next, prev );
}

LL_DATA *linklist = ch->linklist;

if (temp == NULL)   // empty list is special case
  ch->linklist = new_item;
else

else {
    all_objs = new_obj;
  }  

a = 5

b = a

b = b + 1