do not segfault in cache generation on mmap failure

[apt.git] / apt-pkg / metaindex.cc

// Include Files                                                       /*{{{*/
#include <apt-pkg/pkgcachegen.h>
#include <apt-pkg/indexfile.h>
#include <apt-pkg/metaindex.h>

#include <apt-pkg/debmetaindex.h>

#include <string>
#include <vector>
                                                                       /*}}}*/

std::string metaIndex::Describe() const
{
   return "Release";
}

pkgCache::RlsFileIterator metaIndex::FindInCache(pkgCache &Cache, bool const) const
{
   return pkgCache::RlsFileIterator(Cache);
}

bool metaIndex::Merge(pkgCacheGenerator &Gen,OpProgress *) const
{
   return Gen.SelectReleaseFile("", "");
}

metaIndex::metaIndex(std::string const &URI, std::string const &Dist,
      char const * const Type)
: d(NULL), Indexes(NULL), Type(Type), URI(URI), Dist(Dist), Trusted(TRI_UNSET),
   Date(0), ValidUntil(0), SupportsAcquireByHash(false), LoadedSuccessfully(TRI_UNSET)
{
   /* nothing */
}

metaIndex::~metaIndex()
{
   if (Indexes != 0)
   {
      for (std::vector<pkgIndexFile *>::iterator I = (*Indexes).begin();
	    I != (*Indexes).end(); ++I)
	 delete *I;
      delete Indexes;
   }
   for (auto const &E: Entries)
      delete E.second;
}

// one line Getters for public fields					/*{{{*/
APT_PURE std::string metaIndex::GetURI() const { return URI; }
APT_PURE std::string metaIndex::GetDist() const { return Dist; }
APT_PURE const char* metaIndex::GetType() const { return Type; }
APT_PURE metaIndex::TriState metaIndex::GetTrusted() const { return Trusted; }
APT_PURE std::string metaIndex::GetSignedBy() const { return SignedBy; }
APT_PURE std::string metaIndex::GetCodename() const { return Codename; }
APT_PURE std::string metaIndex::GetSuite() const { return Suite; }
APT_PURE bool metaIndex::GetSupportsAcquireByHash() const { return SupportsAcquireByHash; }
APT_PURE time_t metaIndex::GetValidUntil() const { return ValidUntil; }
APT_PURE time_t metaIndex::GetDate() const { return this->Date; }
APT_PURE metaIndex::TriState metaIndex::GetLoadedSuccessfully() const { return LoadedSuccessfully; }

APT_PURE bool metaIndex::CheckDist(string const &MaybeDist) const
{
   return (this->Codename == MaybeDist
	   || this->Suite == MaybeDist);
}
APT_PURE std::string metaIndex::GetExpectedDist() const
{
   // TODO: Used to be an explicit value set in the constructor
   return "";
}
									/*}}}*/
APT_PURE metaIndex::checkSum *metaIndex::Lookup(string const &MetaKey) const /*{{{*/
{
   std::map<std::string, metaIndex::checkSum* >::const_iterator sum = Entries.find(MetaKey);
   if (sum == Entries.end())
      return NULL;
   return sum->second;
}
									/*}}}*/
APT_PURE bool metaIndex::Exists(string const &MetaKey) const		/*{{{*/
{
   return Entries.find(MetaKey) != Entries.end();
}
									/*}}}*/
std::vector<std::string> metaIndex::MetaKeys() const			/*{{{*/
{
   std::vector<std::string> keys;
   std::map<string,checkSum *>::const_iterator I = Entries.begin();
   while(I != Entries.end()) {
      keys.push_back((*I).first);
      ++I;
   }
   return keys;
}
									/*}}}*/
void metaIndex::swapLoad(metaIndex * const OldMetaIndex)		/*{{{*/
{
   std::swap(Entries, OldMetaIndex->Entries);
   std::swap(Date, OldMetaIndex->Date);
   std::swap(ValidUntil, OldMetaIndex->ValidUntil);
   std::swap(SupportsAcquireByHash, OldMetaIndex->SupportsAcquireByHash);
   std::swap(LoadedSuccessfully, OldMetaIndex->LoadedSuccessfully);
}
									/*}}}*/

bool metaIndex::IsArchitectureSupported(std::string const &arch) const	/*{{{*/
{
   debReleaseIndex const * const deb = dynamic_cast<debReleaseIndex const *>(this);
   if (deb != NULL)
      return deb->IsArchitectureSupported(arch);
   return true;
}
									/*}}}*/