BOOL LoadResourcePacket()

in tools/ExeView/res.cpp [29:123]
74 lines of code
11 McCabe index (conditional complexity)

BOOL LoadResourcePacket(PEXEINFO pExeInfo, PRESTYPE prt, PRESINFO pri, LPRESPACKET lprp)
{
    int      fFile;
    OFSTRUCT of;
    int      nErr = 0;
    LONG     lSize;
    LONG     lOffset;
    HANDLE   hMem;
    LPSTR    lpMem;
    char    *lpTMem;

    if (!pExeInfo || !prt || !pri)
    {
        MessageBox(ghWndMain,"Unable to display resource!","EXEVIEW",MB_OK);
        return FALSE;
    }

    if (pExeInfo->NewHdr.wExpVersion < 0x0300)  // Win 2.x app??
    {
        MessageBox(ghWndMain,"Unable to display resource!  Windows 2.X app.","EXEVIEW",MB_OK);
        return FALSE;
    }

    fFile = OpenFile( pExeInfo->pFilename, &of, OF_READ );
    if (!fFile)
    {
        MessageBox(ghWndMain,"Could not open file!","EXEVIEW",MB_OK);
        return FALSE;
    }

    // Calculate the position in the the file and move file pointer
    lOffset = ((LONG)pri->wOffset)<<(pExeInfo->wShiftCount);

    _llseek( fFile, lOffset, 0 );

    // Allocate memory for resource
    lSize   = ((LONG)pri->wLength)<<(pExeInfo->wShiftCount);
    hMem = GlobalAlloc( GHND, lSize );

    if (!hMem)
    {
        _lclose( fFile );
        MessageBox(ghWndMain,"Could not allocate memory for resource!","EXEVIEW",MB_OK);
        return FALSE;
    }

    lpMem = (LPSTR)GlobalLock(hMem);
    if (!lpMem)
    {
        _lclose( fFile );
        MessageBox(ghWndMain,"Could not lock memory for resource!","EXEVIEW",MB_OK);
        GlobalFree( hMem );
        return FALSE;
    }

    // Read in resource from file
    lpTMem = (char *)lpMem;

    SetCursor( LoadCursor(NULL, IDC_WAIT) );
    while (lSize)
    {
        WORD wSize;

        if (lSize>=32767)
            wSize = 32767;
        else
            wSize = (WORD)lSize;

        // _lread is limited to 32K chunks, thus these gyrations
        if (_lread(fFile, (LPSTR)lpTMem, wSize) != wSize)
        {
            _lclose( fFile );
            MessageBox(ghWndMain,"Error reading from file!","EXEVIEW",MB_OK);
            GlobalUnlock( hMem );
            GlobalFree( hMem );
            return FALSE;
        }
        lSize -= wSize;
        lpTMem += wSize;
    }
    SetCursor( LoadCursor(NULL, IDC_ARROW) );


    // Build a resource packet.  This allows the passing of all the
    // the needed info with one 32 bit pointer.
    lprp->pExeInfo = pExeInfo;
    lprp->prt = prt;
    lprp->pri = pri;
    lprp->lSize = ((LONG)pri->wLength)<<(pExeInfo->wShiftCount);
    lprp->lpMem = lpMem;
    lprp->fFile = fFile;
    lprp->hMem = hMem;

    return TRUE;
}