Serious-Engine/Sources/Engine/Templates/StaticStackArray.cpp

/* Copyright (c) 2002-2012 Croteam Ltd. All rights reserved. */


#ifndef SE_INCL_STATICSTACKARRAY_CPP
#define SE_INCL_STATICSTACKARRAY_CPP
#ifdef PRAGMA_ONCE
  #pragma once
#endif

#include <Engine/Templates/StaticStackArray.h>
#include <Engine/Templates/StaticArray.cpp>

/*
 * Default constructor.
 */
template<class Type>
inline CStaticStackArray<Type>::CStaticStackArray(void) : CStaticArray<Type>() {
  sa_UsedCount=0;
  sa_ctAllocationStep = 256;
}

/*
 * Destructor.
 */
template<class Type>
inline CStaticStackArray<Type>::~CStaticStackArray(void) {
};

/* Destroy all objects, and reset the array to initial (empty) state. */
template<class Type>
inline void CStaticStackArray<Type>::Clear(void) {
  if (CStaticArray<Type>::Count()!=0) Delete(); 
}

  /*
 * Set how many elements to allocate when stack overflows.
 */
template<class Type>
inline void CStaticStackArray<Type>::SetAllocationStep(INDEX ctStep) 
{
  ASSERT(ctStep>0);
  sa_ctAllocationStep = ctStep;
};

/*
 * Create a given number of objects.
 */
template<class Type>
inline void CStaticStackArray<Type>::New(INDEX iCount) {
  CStaticArray<Type>::New(iCount);
  sa_UsedCount = 0;
};

/*
 * Destroy all objects.
 */
template<class Type>
inline void CStaticStackArray<Type>::Delete(void) {
  CStaticArray<Type>::Delete();
  sa_UsedCount = 0;
}

/*
 * Add new object(s) on top of stack.
 */
template<class Type>
inline Type &CStaticStackArray<Type>::Push(void) {
  sa_UsedCount++;
  if (sa_UsedCount>CStaticArray<Type>::Count()) {
    Expand(CStaticArray<Type>::Count()+sa_ctAllocationStep);
  }
  ASSERT(sa_UsedCount <= CStaticArray<Type>::Count());
  return CStaticArray<Type>::operator[](sa_UsedCount-1);
}
template<class Type>
inline Type *CStaticStackArray<Type>::Push(INDEX ct) {
  sa_UsedCount+=ct;
  while(sa_UsedCount>CStaticArray<Type>::Count()) {
    Expand(CStaticArray<Type>::Count()+sa_ctAllocationStep);
  }
  ASSERT(sa_UsedCount <= CStaticArray<Type>::Count());
  return &CStaticArray<Type>::operator[](sa_UsedCount-ct);
}

/* Remove one object from top of stack and return it. */
template<class Type>
inline Type &CStaticStackArray<Type>::Pop(void)
{
  ASSERT(sa_UsedCount>0);
  sa_UsedCount--;
  return CStaticArray<Type>::operator[](sa_UsedCount);
}
/*
 * Remove objects higher than the given index from stack, but keep stack space.
 */
template<class Type>
inline void CStaticStackArray<Type>::PopUntil(INDEX iNewTop)
{
  ASSERT(iNewTop < sa_UsedCount);
  sa_UsedCount = iNewTop+1;
}
/*
 * Remove all objects from stack, but keep stack space.
 */
template<class Type>
inline void CStaticStackArray<Type>::PopAll(void) {
  sa_UsedCount = 0;
}

/*
 * Random access operator.
 */
template<class Type>
inline Type &CStaticStackArray<Type>::operator[](INDEX i) {
  ASSERT(this!=NULL);
  ASSERT(i<sa_UsedCount);     // check bounds
  return CStaticArray<Type>::operator[](i);
}
template<class Type>
inline const Type &CStaticStackArray<Type>::operator[](INDEX i) const {
  ASSERT(this!=NULL);
  ASSERT(i<sa_UsedCount);     // check bounds
  return CStaticArray<Type>::operator[](i);
}

/*
 * Get number of elements in array.
 */
template<class Type>
INDEX CStaticStackArray<Type>::Count(void) const {
  ASSERT(this!=NULL);
  return sa_UsedCount;
}

/*
 * Get index of a member from it's pointer
 */
template<class Type>
INDEX CStaticStackArray<Type>::Index(Type *ptMember) {
  ASSERT(this!=NULL);
  INDEX i = CStaticArray<Type>::Index(ptMember);
  ASSERTMSG(i<sa_UsedCount, "CStaticStackArray<>::Index(): Not a member of this array!");
  return i;
}

/*
 * Assignment operator.
 */
template<class Type>
CStaticStackArray<Type> &CStaticStackArray<Type>::operator=(const CStaticStackArray<Type> &arOriginal)
{
  ASSERT(this!=NULL);
  ASSERT(&arOriginal!=NULL);
  ASSERT(this!=&arOriginal);

  // copy stack arrays
  CStaticArray<Type>::operator=(arOriginal);
  // copy used count
  sa_UsedCount = arOriginal.sa_UsedCount;

  return *this;
}


/* Move all elements of another array into this one. */
template<class Type>
void CStaticStackArray<Type>::MoveArray(CStaticStackArray<Type> &arOther)
{
  ASSERT(this!=NULL);
  ASSERT(&arOther!=NULL);
  ASSERT(this!=&arOther);

  // clear previous contents
  Clear();
  // if the other array has no elements
  if (arOther.Count()==0) {
    // no assignment
    return;
  }
  // move data from the other array into this one and clear the other one
  CStaticArray<Type>::MoveArray(arOther);
  sa_UsedCount        = arOther.sa_UsedCount        ;
  sa_ctAllocationStep = arOther.sa_ctAllocationStep ;
  arOther.sa_UsedCount        = 0;
}

#endif  /* include-once check. */