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-rw-r--r--apt-pkg/cacheset.h38
1 files changed, 38 insertions, 0 deletions
diff --git a/apt-pkg/cacheset.h b/apt-pkg/cacheset.h
index 736dda3cf..2656727d4 100644
--- a/apt-pkg/cacheset.h
+++ b/apt-pkg/cacheset.h
@@ -428,6 +428,44 @@ template<> template<class Compare> inline bool PackageContainer<std::vector<pkgC
return true;
}
+// class PackageUniverse - pkgCache as PackageContainerInterface /*{{{*/
+/** \class PackageUniverse
+
+ Wraps around our usual pkgCache, so that it can be stuffed into methods
+ expecting a PackageContainer.
+
+ The wrapping is read-only in practice modeled by making erase and co
+ private methods. */
+class PackageUniverse : public PackageContainerInterface {
+ pkgCache * const _cont;
+public:
+ typedef pkgCache::PkgIterator iterator;
+ typedef pkgCache::PkgIterator const_iterator;
+
+ bool empty() const { return false; }
+ size_t size() const { return _cont->Head().PackageCount; }
+
+ const_iterator begin() const { return _cont->PkgBegin(); }
+ const_iterator end() const { return _cont->PkgEnd(); }
+ iterator begin() { return _cont->PkgBegin(); }
+ iterator end() { return _cont->PkgEnd(); }
+
+ PackageUniverse(pkgCache * const Owner) : _cont(Owner) { }
+
+private:
+ bool insert(pkgCache::PkgIterator const &) { return true; }
+ template<class Cont> void insert(PackageContainer<Cont> const &) { }
+ void insert(const_iterator, const_iterator) { }
+
+ void clear() { }
+ iterator& erase(iterator &iter) { return iter; }
+ size_t erase(const pkgCache::PkgIterator) { return 0; }
+ void erase(iterator, iterator) { }
+
+ void setConstructor(Constructor const &) { }
+ Constructor getConstructor() const { return UNKNOWN; }
+};
+ /*}}}*/
typedef PackageContainer<std::set<pkgCache::PkgIterator> > PackageSet;
typedef PackageContainer<std::list<pkgCache::PkgIterator> > PackageList;
typedef PackageContainer<std::vector<pkgCache::PkgIterator> > PackageVector;