/*  Starshatter OpenSource Distribution
    Copyright (c) 1997-2004, Destroyer Studios LLC.
    All Rights Reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
    * Neither the name "Destroyer Studios" nor the names of its contributors
      may be used to endorse or promote products derived from this software
      without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.

    SUBSYSTEM:    FoundationEx
    FILE:         List.inl
    AUTHOR:       John DiCamillo


    OVERVIEW
    ========
    Implementation of the List class template
*/

// +-------------------------------------------------------------------+

void Print(const char* fmt, ...);

// +-------------------------------------------------------------------+

template <class T>
List<T>::List(const List<T>& l)
  : items(l.items), extent(l.extent)
{
#ifdef MEM_DEBUG
   array = new(__FILE__,__LINE__) PTR[extent];
#else
   array = new PTR[extent];
#endif

   for (int i = 0; i < extent; i++)
      array[i] = l.array[i];
}

template <class T>
void List<T>::clear()
{
   delete [] array;
   items       = 0;
   extent  = 0;
   array       = 0;
}

template <class T>
void List<T>::destroy()
{
   if (items) {
      items = 0;  // prevent dangerous re-entrancy

      for (int i = 0; i < extent; i++)
         delete array[i];

      delete [] array;
      items       = 0;
      extent  = 0;
      array       = 0;
   }
}

// +-------------------------------------------------------------------+

template <class T>
bool List<T>::check(int& index) const
{
   if (index < 0) {
      Print("Bounds error in List(%08x) T=%s index=%d min=0\n", (int)this, T::TYPENAME(), index);
      index = 0;
   }

   else if (index >= items) {
      Print("Bounds error in List(%08x) T=%s index=%d max=%d\n", (int)this, T::TYPENAME(), index, items-1);
      index = items-1;
   }

   return (index >= 0 && index < items);
}

// +-------------------------------------------------------------------+

template <class T>
T*& List<T>::operator[](int index)
{
   if (check(index))
      return array[index];

   if (!array || !extent)
      resize(1);

   return array[0];
}

template <class T>
T* List<T>::operator[](int index) const
{
   if (check(index))
      return array[index];
   return 0;
}

template <class T>
T*& List<T>::at(int index)
{
   if (check(index))
      return array[index];

   if (!array || !extent)
      resize(1);

   return array[0];
}

template <class T>
T* List<T>::at(int index) const
{
   if (check(index))
      return array[index];
   return 0;
}

// +-------------------------------------------------------------------+

template <class T>
void List<T>::resize(int newsize)
{
   if (newsize > extent) {
      extent = 16 * (newsize/16 + 1);

#ifdef MEM_DEBUG
      T** v = new(__FILE__,__LINE__) PTR[extent];
#else
      T** v = new PTR[extent];
#endif
      int i;
      for (i = 0; i < items; i++)
         v[i] = array[i];

      for (; i < extent; i++)
         v[i] = 0;

      delete [] array;
      array = v;
   }
}

// +-------------------------------------------------------------------+

template <class T>
void List<T>::append(const T* item)
{
   if (item) {
      if (items+1 > extent) resize(items+1);
      array[items++] = (T*)item;
   }
}

template <class T>
void List<T>::append(List<T>& list)
{
   if (&list != this && list.items > 0) {
      int need = items + list.items;
      if (need > extent) resize(need);

      for (int i = 0; i < list.items; i++)
         array[items++] = list.array[i];
   }
}

// +-------------------------------------------------------------------+

template <class T>
void List<T>::insert(const T* item, int index)
{
   if (item && index >= 0 && index <= items) {
      if (items+1 > extent) resize(items+1);

      // slide right:
      for (int i = items; i > index; i--)
         array[i] = array[i-1];

      array[index] = (T*)item;
      items++;
   }
}

// +-------------------------------------------------------------------+

template <class T>
void List<T>::insertSort(const T* item)
{
    if (item) {
        int i;
        for (i = 0; i < items; i++) {
            if (*item < *array[i])
                break;
        }

        insert(item, i);
    }
}

// +-------------------------------------------------------------------+

template <class T>
T* List<T>::remove(const T* val)
{
   if (items == 0 || val == 0)
      return 0;

   for (int i = 0; i < items; i++) {
      if (array[i] == val) {
         return removeIndex(i);
      }
   }

   return 0;
}

// +-------------------------------------------------------------------+

template <class T>
T* List<T>::removeIndex(int index)
{
   if (!check(index))
      return 0;

   T* tmp = array[index];
   array[index] = 0;

   // slide left:
   for (int i = index; i < items-1; i++)
      array[i] = array[i+1];

   // blank out the hole we just created:
   array[items-1] = 0;

   items--;
   return tmp;
}

// +-------------------------------------------------------------------+

template <class T>
bool List<T>::contains(const T* val) const
{
   if (val) {
      if (index(val) != -1)
          return true;
   }

   return false;
}

// +-------------------------------------------------------------------+

template <class T>
int List<T>::count(const T* val) const
{
   int c = 0;

   if (val) {
      for (int i = 0; i < items; i++) {
         if (array[i] && ((*array[i])==(*val)))
            c++;
      }
   }

   return c;
}

// +-------------------------------------------------------------------+

template <class T>
int List<T>::index(const T* val) const
{
   if (val) {
      for (int i = 0; i < items; i++) {
         if (array[i] && ((*array[i])==(*val)))
            return i;
      }
   }

   return -1;
}

// +-------------------------------------------------------------------+

template <class T>
T* List<T>::find(const T* val) const
{
   if (val) {
      for (int i = 0; i < items; i++) {
         if (array[i] && ((*array[i])==(*val)))
            return array[i];
      }
   }

   return 0;
}

// +-------------------------------------------------------------------+

template <class T>
void List<T>::swap(T** a, int i, int j)
{
   if (i >= 0 && i < items && j >= 0 && j < items && i != j) {
      T* t = a[i];
      a[i] = a[j];
      a[j] = t;
   }
}

template <class T>
void List<T>::qsort(T** a, int lo0, int hi0)
{
   int lo = lo0;
   int hi = hi0;

   // zero or one element list, nothing to do:
   if (lo >= hi) {
      return;
   }

   // two element list, swap if needed:
   else if (lo == hi-1) {
      if (*a[hi] < *a[lo]) {
         swap(a, lo, hi);
      }
      return;
   }

   // pick a pivot, and move it out of the way:
   int mid   = (lo+hi)/2;
   T*  pivot = a[mid];
   a[mid]    = a[hi];
   a[hi]     = pivot;

   while (lo < hi) {
      while ((*a[lo] <= *pivot) && lo < hi) lo++;
      while ((*pivot <= *a[hi]) && lo < hi) hi--;

      if (lo < hi) {
         swap(a, lo, hi);
      }
   }

   // Put the pivot into its final location:
   a[hi0] = a[hi];
   a[hi] = pivot;

    qsort(a, lo0, lo-1);
    qsort(a, hi+1, hi0);
}

template <class T>
void List<T>::sort()
{
   if (items < 2)
      return;

   qsort(array, 0, items-1);
}

template <class T>
void List<T>::shuffle()
{
   if (items < 3)
      return;

   for (int s = 0; s < 5; s++) {
      for (int i = 0; i < items; i++) {
         int j = (rand()>>4) % items;
         swap(array, i, j);
      }
   }
}

// +===================================================================+

template <class T>
T* ListIter<T>::value()
{
   if (list && step >= 0 && step < list->items)
      return list->array[step];

   return 0;
}

// +-------------------------------------------------------------------+

template <class T>
T* ListIter<T>::removeItem()
{
   if (list && step >= 0 && step < list->items)
      return list->removeIndex(step--);

   return 0;
}

// +-------------------------------------------------------------------+

template <class T>
T* ListIter<T>::next()
{
   if (list && step >= -1 && step < list->items-1)
      return list->array[++step];

   return 0;
}

template <class T>
T* ListIter<T>::prev()
{
   if (list && step > 0 && step < list->items)
      return list->array[--step];

   return 0;
}

// +-------------------------------------------------------------------+

template <class T>
void ListIter<T>::attach(List<T>& l)
{
   list = &l;
   step = -1;
}

// +-------------------------------------------------------------------+

template <class T>
int ListIter<T>::size()
{
   if (!list) return 0;
   return list->items;
}

// +-------------------------------------------------------------------+

template <class T>
List<T>& ListIter<T>::container()
{
   return *list;
}