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/* Copyright (c) <2003-2011> <Julio Jerez, Newton Game Dynamics>
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*/
/****************************************************************************
*
* Visual C++ 6.0 created by: Julio Jerez
*
****************************************************************************/
#ifndef __dgArray__
#define __dgArray__
#include "dgTypes.h"
template<class T>
class dgArray
{
public:
dgArray (int32_t granulatitySize,int32_t aligmentInBytes = DG_MEMORY_GRANULARITY);
~dgArray ();
T& operator[] (int32_t i);
const T& operator[] (int32_t i) const;
void Resize (int32_t size) const;
int32_t GetBytesCapacity () const;
int32_t GetElementsCapacity () const;
bool ExpandCapacityIfNeessesary (int32_t index, int32_t stride) const;
private:
int32_t m_granulatity;
int32_t m_aligmentInByte;
mutable int32_t m_maxSize;
mutable T *m_array;
};
template<class T>
dgArray<T>::dgArray (int32_t granulatitySize,int32_t aligmentInBytes)
:m_granulatity(granulatitySize), m_aligmentInByte(aligmentInBytes), m_maxSize(0), m_array(NULL)
{
if (m_aligmentInByte <= 0) {
m_aligmentInByte = 8;
}
m_aligmentInByte = 1 << exp_2(m_aligmentInByte);
}
template<class T>
dgArray<T>::~dgArray ()
{
if (m_array) {
HACD_FREE(m_array);
}
}
template<class T>
const T& dgArray<T>::operator[] (int32_t i) const
{
HACD_ASSERT (i >= 0);
while (i >= m_maxSize) {
Resize (i);
}
return m_array[i];
}
template<class T>
T& dgArray<T>::operator[] (int32_t i)
{
HACD_ASSERT (i >= 0);
while (i >= m_maxSize) {
Resize (i);
}
return m_array[i];
}
template<class T>
int32_t dgArray<T>::GetElementsCapacity () const
{
return m_maxSize;
}
template<class T>
int32_t dgArray<T>::GetBytesCapacity () const
{
return m_maxSize * int32_t (sizeof (T));
}
template<class T>
void dgArray<T>::Resize (int32_t size) const
{
if (size >= m_maxSize) {
size = size + m_granulatity - (size + m_granulatity) % m_granulatity;
T* const newArray = (T*) HACD_ALLOC_ALIGNED(size_t(sizeof (T) * size), m_aligmentInByte);
if (m_array) {
for (int32_t i = 0; i < m_maxSize; i ++) {
newArray[i] = m_array[i];
}
HACD_FREE(m_array);
}
m_array = newArray;
m_maxSize = size;
} else if (size < m_maxSize) {
size = size + m_granulatity - (size + m_granulatity) % m_granulatity;
T* const newArray = (T*) HACD_ALLOC_ALIGNED(size_t(sizeof (T) * size), m_aligmentInByte);
if (m_array) {
for (int32_t i = 0; i < size; i ++) {
newArray[i] = m_array[i];
}
HACD_FREE(m_array);
}
m_array = newArray;
m_maxSize = size;
}
}
template<class T>
bool dgArray<T>::ExpandCapacityIfNeessesary (int32_t index, int32_t stride) const
{
bool ret = false;
int32_t size = (index + 1) * stride;
while (size >= m_maxSize) {
ret = true;
Resize (m_maxSize * 2);
}
return ret;
}
#endif
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