silentbob/gclib/src/elist.cxx

   1 /*
   2  * (c) Oleg Puchinin 2006
   3  * graycardinalster@gmail.com
   4  *
   5  */
   6
   7 #include <gclib/gclib.h>
   8
   9 EList::EList ()
  10 {
  11         pos = NULL;
  12 }
  13
  14 EList::~EList ()
  15 {
  16 }
  17
  18 char * EList::get ()
  19 {
  20         if (! pos)
  21                 return NULL;
  22         else
  23                 return pos->data;
  24 }
  25
  26 char * EList::first ()
  27 {
  28         pos = get_head ();
  29         return get ();
  30 }
  31
  32 char * EList::last ()
  33 {
  34         pos = get_tail ();
  35         return get ();
  36 }
  37
  38 char * EList::next ()
  39 {
  40         if (! pos->next)
  41                 pos = NULL;
  42         else
  43                 pos = pos->next;
  44         return get ();
  45 }
  46
  47 char * EList::prev ()
  48 {
  49         if (! pos->prev)
  50                 pos = NULL;
  51         else
  52                 pos = pos->prev;
  53         return get ();
  54 }
  55
  56 char * EList::rm ()
  57 {
  58         __dlist_entry_t *ptr;
  59         char * Ret;
  60
  61         if (! pos)
  62                 return NULL;
  63
  64         ptr = pos;
  65         Ret = ptr->data;
  66
  67         if (ptr->next)
  68                 pos = ptr->next;
  69         else if (ptr->prev)
  70                 pos = ptr->prev;
  71         else
  72                 pos = NULL;
  73
  74         DList::rm (ptr);
  75         return Ret;
  76 }
  77
  78 EList & EList::operator << (char * S)
  79 {
  80         add_tail (S);
  81         return *this;
  82 }
  83
  84 bool EList::eol ()
  85 {
  86         return pos ? false : true;
  87 }
  88