int eRawFile::switchOffset(off_t off)
{
if (m_splitsize)
{
int filenr = off / m_splitsize;
if (filenr >= m_nrfiles)
filenr = m_nrfiles - 1;
if (filenr != m_current_file)
{
// eDebug("-> %d", filenr);
close();
m_fd = openFileUncached(filenr);
m_last_offset = m_base_offset = m_splitsize * filenr;
m_current_file = filenr;
}
} else
m_base_offset = 0;
if (off != m_last_offset)
{
m_last_offset = ::lseek(m_fd, off - m_base_offset, SEEK_SET) + m_base_offset;
return m_last_offset;
} else
{
return m_last_offset;
}
}
void eRawFile::scan()
{
m_nrfiles = 0;
m_totallength = 0;
while (m_nrfiles < 1000) /* .999 is the last possible */
{
if (!m_cached)
{
int f = openFileUncached(m_nrfiles);
if (f < 0)
break;
if (!m_nrfiles)
m_splitsize = ::lseek(f, 0, SEEK_END);
m_totallength += ::lseek(f, 0, SEEK_END);
::close(f);
} else
{
FILE *f = openFileCached(m_nrfiles);
if (!f)
break;
::fseeko(f, 0, SEEK_END);
if (!m_nrfiles)
m_splitsize = ::ftello(f);
m_totallength += ::ftello(f);
::fclose(f);
}
++m_nrfiles;
}
// eDebug("found %d files, splitsize: %llx, totallength: %llx", m_nrfiles, m_splitsize, m_totallength);
}