#include "stdafx.h"

#include <stdlib.h>
#include <string.h>
#include "MemoryUtils.h"
#include "List.h"

//------------------------------------------------------------------------
// CList
//------------------------------------------------------------------------

CList::CList() 
{
	m_nItemSize = 8;
	m_ppData = (void **)MemUtilsMallocArray(m_nItemSize, sizeof(void*));
	m_nCount = 0;
	m_nIncreament = 0;
}

CList::CList(int nSize) 
{
	m_nItemSize = nSize;
	m_ppData = (void **)MemUtilsMallocArray(m_nItemSize, sizeof(void*));
	m_nCount = 0;
	m_nIncreament = 0;
}

CList::~CList() 
{
	MemUtilsFree(m_ppData);
}

void CList::Append(void *pItem) 
{
	if (m_nCount >= m_nItemSize)
	    Expand();
	m_ppData[m_nCount++] = pItem;
}

void CList::Append(CList *pList) 
{
	while ( m_nCount + pList->m_nCount > m_nItemSize )
		Expand();
	for (int nIndex = 0; nIndex < pList->m_nCount; ++nIndex )
		m_ppData[m_nCount++] = pList->m_ppData[ nIndex ];
}

void CList::Insert(int nIndex, void *pItem) 
{
	if ( 0 > nIndex  || nIndex > m_nCount )
		return;
	if ( m_nCount >= m_nItemSize ) 
		Expand();
	if ( nIndex < m_nCount ) 
		memmove( m_ppData + nIndex + 1, m_ppData + nIndex, ( m_nCount - nIndex ) * sizeof(void *));
	m_ppData[ nIndex ] = pItem;
	++m_nCount;
}

void *CList::Delete(int nIndex) 
{
	void *pItem = m_ppData[ nIndex ];
	if ( nIndex < m_nCount - 1 ) 
		memmove( m_ppData + nIndex, m_ppData + nIndex + 1, (m_nCount - nIndex - 1) * sizeof(void *));
	--m_nCount;
	if ( m_nItemSize - m_nCount >= ((m_nIncreament > 0) ? m_nIncreament : m_nItemSize / 2 ) )
		Shrink();
	return pItem;
}

void CList::Sort(int (*CompareFunc)(const void *pItem1, const void *pItem2 ) ) 
{
	qsort( m_ppData, m_nCount, sizeof(void *), CompareFunc);
}

void CList::Expand() 
{
	m_nItemSize += ( m_nIncreament > 0 ) ? m_nIncreament : m_nItemSize;
	m_ppData = (void **)MemUtilsReallocArray( m_ppData, m_nItemSize, sizeof(void*) );
}

void CList::Shrink() 
{
	m_nItemSize -= ( m_nIncreament > 0 ) ? m_nIncreament : m_nItemSize / 2;
	m_ppData = (void **)MemUtilsReallocArray( m_ppData, m_nItemSize, sizeof(void*) );
}