C++ (Cpp) FX_SAFE_FILESIZE Examples

Example #1

File: fpdfview.cpp Project: Gottox/pdfium

FX_BOOL CPDF_CustomAccess::ReadBlock(void* buffer, FX_FILESIZE offset, size_t size)
{
    if (offset < 0) {
        return FALSE;
    }
    FX_SAFE_FILESIZE newPos = base::checked_cast<FX_FILESIZE, size_t>(size);
    newPos += offset;
    if (!newPos.IsValid() || newPos.ValueOrDie() > m_FileAccess.m_FileLen) {
        return FALSE;
    }
    return m_FileAccess.m_GetBlock(m_FileAccess.m_Param, offset,(FX_LPBYTE) buffer, size);
}

Example #2

File: fpdfview.cpp Project: mariospr/chromium-browser

	virtual FX_BOOL			ReadBlock(void* buffer, FX_FILESIZE offset, size_t size)
	{
            if (offset < 0) {
                return FALSE;
            }
            FX_SAFE_FILESIZE newPos = pdfium::base::checked_cast<FX_FILESIZE, size_t>(size);
            newPos += offset;
            if (!newPos.IsValid() || newPos.ValueOrDie() > (FX_DWORD)m_size) {
                return FALSE;
            }
	    FXSYS_memcpy(buffer, m_pBuf+offset, size);
	    return TRUE;
	}

Example #3

File: cpdf_data_avail.cpp Project: documentcloud/pdfium

bool CPDF_DataAvail::IsDataAvail(FX_FILESIZE offset,
                                 uint32_t size,
                                 DownloadHints* pHints) {
  if (offset < 0 || offset > m_dwFileLen)
    return true;

  FX_SAFE_FILESIZE safeSize = offset;
  safeSize += size;
  safeSize += 512;
  if (!safeSize.IsValid() || safeSize.ValueOrDie() > m_dwFileLen)
    size = m_dwFileLen - offset;
  else
    size += 512;

  if (!m_pFileAvail->IsDataAvail(offset, size)) {
    if (pHints)
      pHints->AddSegment(offset, size);
    return false;
  }
  return true;
}