To Ascii conversion error - c++-cli

Question

#include "stdafx.h"
typedef unsigned char byte;
typedef unsigned char BYTE;
using namespace System::Runtime::InteropServices;
using namespace System;
public ref class CRsiComBase {
public :
static int ToAsciiHex(BYTE* pToBuf, BYTE* pFromBuf, int iStartingIndex, int iLength);
static int ToAsciiHex(cli::array<byte>^ baToBuf, cli::array<byte>^ baFromBuf, int iStartingIndex, int iLength);
static cli::array<BYTE>^ hexTable = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
};
int CRsiComBase::ToAsciiHex(BYTE* pToBuf, BYTE* pFromBuf, int iStartingIndex, int iLength)
{
BYTE* pOutBuf = pToBuf;
for (int j = 0; j < iStartingIndex; j++)
{
*pOutBuf++ = pFromBuf[j];
}
for (int i = iStartingIndex; i < iLength; i++) {
BYTE b = pFromBuf[i];
BYTE hb = b >> 4;
BYTE lb = b & 0x0F;
*pOutBuf++ = hexTable[(int)hb];
*pOutBuf++ = hexTable[(int)lb];
}
return static_cast<int>(pOutBuf - pToBuf); // Length of message in pToBuf;
}
int CRsiComBase::ToAsciiHex(cli::array<byte>^ baToBuf, cli::array<byte>^ baFromBuf, int iStartingIndex, int iLength) {
int iRtn = 0;
int fromLength = sizeof(baFromBuf);
IntPtr pFromBuf = Marshal::AllocHGlobal(fromLength);
Marshal::Copy(baFromBuf, 0, pFromBuf, fromLength);
BYTE* pbFromBuf = (BYTE*)pFromBuf.ToPointer();
int toLength = sizeof(baToBuf);
BYTE* pbToBuf = new BYTE[toLength];
iRtn = ToAsciiHex(pbToBuf, pbFromBuf, iStartingIndex, iLength);
Marshal::Copy(static_cast<IntPtr>(pbToBuf), baToBuf, 0, iLength * 2);
Marshal::FreeHGlobal(pFromBuf);
delete[] pbToBuf;
return iRtn;
}
int main(array<System::String ^> ^args)
{
Console::WriteLine(L"Hello World");
cli::array<byte>^ fromArray = gcnew cli::array<byte>(8);
fromArray[0] = 1;
fromArray[1] = 2;
fromArray[2] = 3;
fromArray[3] = 4;
fromArray[4] = 5;
fromArray[5] = 6;
fromArray[6] = 7;
fromArray[7] = 8;
cli::array<byte>^ toArray = gcnew cli::array<byte>(16);
CRsiComBase::ToAsciiHex(toArray, fromArray, 0, 8);
Console::WriteLine(L"{0}", toArray[0]);
Console::WriteLine(L"{0}", toArray[1]);
Console::WriteLine(L"{0}", toArray[2]);
Console::WriteLine(L"{0}", toArray[3]);
Console::WriteLine(L"{0}", toArray[4]);
Console::WriteLine(L"{0}", toArray[5]);
Console::WriteLine(L"{0}", toArray[6]);
Console::WriteLine(L"{0}", toArray[7]);
return 0;
}
For the above code i am getting error ]1
In the above code i am trying to convert Byte to AsciiHex .
I am not able to figure why delete is causing Heap corruption ?
If i remove delete it will cause exceptions at later part
I am getting error at "delete[] pbToBuf"; line ! please help me by pointing what i am doing wrong :(

Answer 1

sizeof paToBuf ist not the size of the array.
Use the method Length to get the logical size of the array.