Нарушение прав доступа при чтении

struct Catalog {
  unsigned long Name, RecordSize, Flags[4];
  void *Records;};
 
struct Record {
  unsigned long Name;
  unsigned short DataSize;
  void *Data;};
 
typedef Catalog *PCatalog;
typedef Record *PRecord;

class Parser {
  char *Buffer;
  unsigned long Count;
  public:
    PCatalog *Items;
    Parser(const TCHAR *FileName);
    virtual ~Parser() {if (Count) {delete[] Buffer; delete[] Items;}}
    virtual unsigned long GetCount() const {return Count;}};

Parser::Parser(const TCHAR *FileName) {
  LARGE_INTEGER fileSize;
  // Открываем файл FileName.
  void *handle = CreateFile(FileName, GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);
  if (handle == INVALID_HANDLE_VALUE) throw GetLastError();
  try {
    // Получаем размер файла.
    if (!GetFileSizeEx(handle, &fileSize)) throw GetLastError();
    if (fileSize.HighPart) throw (unsigned long)ERROR_FILE_TOO_LARGE;
    if (fileSize.LowPart) {
      unsigned long size;
      // Заполняем Buffer данными из файла.
      Buffer = new char[fileSize.LowPart];
      if (!readFile(handle, Buffer, fileSize.LowPart, &size, 0)) throw GetLastError();
      if (size != fileSize.LowPart) throw (unsigned long)ERROR_FILE_CORRUPT;
      // Считаем количество каталогов.
      Count = 0;
      for (unsigned long offset = 0; offset < size; offset += *(unsigned long *)&Buffer[offset + 4] + 24) Count++;
      // Заполняем Items указателями на начало каждого каталога в Buffer.
      Items = new PCatalog[Count];
      for (unsigned long index = 0, offset = 0; offset < size; offset += *(unsigned long *)&Buffer[offset + 4] + 24) Items[index++] = (Catalog *)&Buffer[offset];}
    else Count = 0;}
  catch (...) {
    СloseHandle(handle);
    throw;}
  if (!СloseHandle(handle)) throw GetLastError();}

class RecordParser {
  unsigned long Count;
  public:
    PRecord *Items;
    RecordParser(const Catalog *Parent);
    virtual ~RecordParser {if (Count) delete[] Items;}
    virtual unsigned long GetCount() const {return Count;}};

RecordParser::RecordParser (const Catalog *Parent) {
  const char *data = (char *)Parent->Records;
  const unsigned long size = Parent->RecordSize;
  // Считаем количество записей.
  Count = 0;
  if (size) {
    for (unsigned long offset = 0; offset < size; offset += *(unsigned short *)&data[offset + 4] + 6) Count++;
    // Заполняем Items указателями на начало каждой записи в data.
    Items = new PRecord[Count];
    for (unsigned long index = 0, offset = 0; offset < size; offset += *(unsigned short *)&data[offset + 4] + 6) Items[index++] = (Record *)&data[offset];}}

const char *data = (char *)Parent->Records;

const char *data = (char *)(unsigned long)Parent->Records;

(*data)

struct Catalog {
  unsigned long Name, RecordSize, Flags[4];
  void *Records;};