bool FileReader::ArchiveFiles(void)
{
#if PLATFORM == PLAT_WIN
return WindowsRead();
#else
return UnixRead();
#endif
}
/// Read the index contained in the file f. This function always reads all
/// bitvectors.
int ibis::skive::read(const char* f) {
std::string fnm;
indexFileName(fnm, f);
int fdes = UnixOpen(fnm.c_str(), OPEN_READONLY);
if (fdes < 0) {
LOGGER(ibis::gVerbose > 0)
<< "Warning -- skive[" << col->partition()->name() << '.'
<< col->name() << "]::read failed to open " << fnm;
return -1; // can not do anything else
}
char header[8];
IBIS_BLOCK_GUARD(UnixClose, fdes);
#if defined(_WIN32) && defined(_MSC_VER)
(void)_setmode(fdes, _O_BINARY);
#endif
int ierr = UnixRead(fdes, static_cast<void*>(header), 8);
if (ierr != 8) {
LOGGER(ibis::gVerbose > 0)
<< "Warning -- skive[" << col->partition()->name() << '.'
<< col->name() << "]::read failed to read 8 bytes from "
<< fnm;
return -2;
}
if (!(header[0] == '#' && header[1] == 'I' &&
header[2] == 'B' && header[3] == 'I' &&
header[4] == 'S' &&
(header[5] == static_cast<char>(ibis::index::SKIVE) ||
header[5] == static_cast<char>(ibis::index::SLICE)) &&
(header[6] == 8 || header[6] == 4) &&
header[7] == static_cast<char>(0))) {
if (ibis::gVerbose > 0) {
ibis::util::logger lg;
lg() << "Warning -- skive[" << col->partition()->name() << '.'
<< col->name() << "]::read the header from " << fnm << " (";
printHeader(lg(), header);
lg() << ") does not contain the expected values";
}
return -3;
}
uint32_t dim[3]; // nrows, nobs, card
size_t begin, end;
clear(); // clear the current content
ierr = UnixRead(fdes, static_cast<void*>(dim), 3*sizeof(uint32_t));
nrows = dim[0];
// read vals
begin = 8*((3*sizeof(uint32_t) + 15) / 8);
end = begin + dim[2] * sizeof(double);
{
array_t<double> dbl(fnm.c_str(), fdes, begin, end);
vals.swap(dbl);
}
// read the offsets
begin = end;
end += header[6] * (dim[1] + 1);
ierr = initOffsets(fdes, header[6], begin, dim[1]);
if (ierr < 0)
return ierr;
// cnts
begin = end;
end += sizeof(uint32_t) * dim[2];
{
array_t<uint32_t> szt(fnm.c_str(), fdes, begin, end);
cnts.swap(szt);
}
ibis::fileManager::instance().recordPages(0, end);
initBitmaps(fdes);
activate();
return 0;
} // ibis::skive::read
