windows-server-2003/base/ntsetup/spsetup/regdiff/regstringbuffer.cpp

// RegStringArray.cpp: implementation of the CRegStringBuffer class.
//
//////////////////////////////////////////////////////////////////////

#include "RegStringBuffer.h"

#include <stdlib.h>


//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CRegStringBuffer::CRegStringBuffer(int arraySize, int elementSize)
: m_arraySize(arraySize), m_elementSize(elementSize), m_cellsUsed(0)
{
	m_Array = new TCHAR*[arraySize];

	if (m_Array == NULL)
	{
		LOG0(LOG_ERROR, "Couldn't allocate CRegStringBuffer");
	}
	else
	{
		for (int i=0; i<arraySize; i++)
		{
			m_Array[i] = new TCHAR[elementSize];
		
			if (m_Array[i] == NULL)
			{
				LOG0(LOG_ERROR, "Couldn't allocate CRegStringBuffer");
				break;
			}
		}
	}
}

CRegStringBuffer::~CRegStringBuffer()
{
	for (int i=0; i<m_arraySize; i++)
	{
		delete[] m_Array[i];
	}

	delete[] m_Array;
}


int mMax(int a, int b)
{
	if (a > b)
		return a;
	else
		return b;
}


TCHAR** CRegStringBuffer::Access(int NumElements, int ElementSize)
{
	if ((NumElements > m_arraySize)
		|| (ElementSize > m_elementSize))
	{
		//delete the data structure
		for (int i=0; i<m_arraySize; i++)
		{
			delete[] m_Array[i];
		}

		delete[] m_Array;

		//assign new larger dimensions
		m_arraySize = mMax(m_arraySize, NumElements);
		m_elementSize = mMax(m_elementSize, ElementSize);

		//reallocate the array
		/*m_Array = new TCHAR*[m_arraySize];

		for (int i=0; i<m_arraySize; i++)
		{
			m_Array[i] = new TCHAR[m_elementSize];
		}*/

		m_Array = new TCHAR*[m_arraySize];

		if (m_Array == NULL)
		{
			LOG0(LOG_ERROR, "Couldn't allocate CRegStringBuffer");
		}
		else
		{
			for (int i=0; i<m_arraySize; i++)
			{
				m_Array[i] = new TCHAR[m_elementSize];
			
				if (m_Array[i] == NULL)
				{
					LOG0(LOG_ERROR, "Couldn't allocate CRegStringBuffer");
					break;
				}
			}
		}
	}

	return m_Array;
}



int __cdecl compare( const void *arg1, const void *arg2 )
{
   /* Compare all of both strings: */
   return _tcscmp( * ( TCHAR** ) arg1, * ( TCHAR** ) arg2 );
}

void CRegStringBuffer::Sort(int NumElements)
{
	qsort( (void *)m_Array, NumElements, sizeof(TCHAR*), compare );
}