QSort for CStringArray

Environment: Tested on VC5

These three routines can be used to perform a qsort on a CStringArray.  It is
a fairly simple hack, but still a hack.  It sure is fast, though.


// first, declare these somewhere
void SortStringArray (CStringArray& ar, BOOL bDescending);
int CompareDescending(const void *a, const void *b);
int CompareAscending(const void *a, const void *b);

// put something in your CString array
CStringArray bob;
bob.Add(“Are”);
bob.Add(“You”);
bob.Add(“Talking”);
bob.Add(“To”);
bob.Add(“Me?”);

// sort it
SortStringArray(bob, TRUE);

// here’s the code!

//////////////////////////////////////////////////////////////////////////
int CompareAscending(const void *a, const void *b)
{
CString *pA = (CString*)a;
CString *pB = (CString*)b;
return (pA->Compare(*pB));
}

//////////////////////////////////////////////////////////////////////////
int CompareDescending(const void *a, const void *b)
{
CString *pA = (CString*)a;
CString *pB = (CString*)b;
return (-1 * (pA->Compare(*pB)));
}

//////////////////////////////////////////////////////////////////////////
void SortStringArray (CStringArray& csa, BOOL bDescending)
{
int iArraySize = csa.GetSize();
if (iArraySize <= 0) return; int iCSSize = sizeof (CString*); void* pArrayStart = (void *)&csa[0]; if (bDescending) qsort (pArrayStart, iArraySize, iCSSize, CompareDescending); else qsort (pArrayStart, iArraySize, iCSSize, CompareAscending); }

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