Convert char* to Byte*

In summary I am trying to pass a compressed file to an uncompress function...

The uncompress function is defined as follows

Code:

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/*------------------------------------------------------------------------------
--------------------------
int DecompressLZW(BYTE *pSrcData,DWORD dwSrcSize,BYTE* OutputBuffer,DWORD dwMaxOutput)

pSrcData - raw compressed data to be decompressed
dwSrcSize - the number of bytes of compressed data to decompress
OutputBuffer - the location to write the decompressed data into
dwMaxOutput - the maximum amount to write into the OutputBuffer
--------------------------------------------------------------------------------
---------------------*/

---

I then have an open file dialog....

Code:

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BYTE * OutputBuffer;
BYTE * pSrcData;
CString strl="Please Select a Compressed File to Decompress";

        char strFilter8[]= { "CMP Files(*.cmp)|*.cmp|All Files(*.*)|*.*||"};
        CFileDialog dlgFile8(TRUE, ".cmp", NULL,0,strFilter8);
        dlgFile8.m_ofn.lpstrTitle= strl;
                if (dlgFile8.DoModal() ==IDOK)
        {
               
               
               
               
        ifstream file9((LPCTSTR) dlgFile8.GetFileName(), ios::in|ios::binary);
                file9.seekg (0, ios::end);
                int sizecmp = file9.tellg();
                int sizecmp2 = sizecmp * 3;
                file9.seekg (0, ios::beg);
                pSrcData = new BYTE[sizecmp];
                file9.read (pSrcData, sizecmp);
                file9.close();
                OutputBuffer = new BYTE[sizecmp2];
        DecompressLZW(pSrcData,sizecmp, OutputBuffer,sizecmp2);
               
        }

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The problem is the file.read requires a char * buffer and if I use a char * buffer I cannot pass pSrcData to the function as the function requires a Byte *

I know the answer is staring me in the face but I cant seem to get it to work.

This is a common problem.

cast the byte* to char*.

Code:

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file9.read ((char*)pSrcData, sizecmp);

---

byte * is the same as unsigned char*.

I find myself doing this occasionally. Also I like to read my files byte by byte especially when dealing with binary data.

ahoodin

PS If this helped, don't forget to rate. Good things come to those who rate.

so basically if I use unsigned char * pSrcData I can pass that to the function.....I will give that a go...