69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
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// Copyright (c) 1994 James Clark
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// See the file COPYING for copying permission.
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#ifndef PointerTable_INCLUDED
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#define PointerTable_INCLUDED 1
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#include "Vector.h"
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#include "Boolean.h"
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#include <stddef.h>
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#ifdef SP_NAMESPACE
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namespace SP_NAMESPACE {
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#endif
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template<class P, class K, class HF, class KF> class PointerTableIter;
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template<class P, class K, class HF, class KF>
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class PointerTable {
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void constraints() {
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P p(0);
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const K &key = KF::key(*p);
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unsigned long n = HF::hash(key);
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n = 0; // prevent warning
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}
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public:
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PointerTable();
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P insert(P, Boolean replace = 0);
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// Return a reference so that it is possible to do
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// lookups into a table of smart-pointers from multiple threads.
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const P &lookup(const K &) const;
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P remove(const K &);
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size_t count() const { return used_; }
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void clear();
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void swap(PointerTable<P, K, HF, KF> &);
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protected:
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size_t used_;
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size_t usedLimit_;
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Vector<P> vec_;
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P null_;
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size_t startIndex(const K &k) const {
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return size_t(HF::hash(k) & (vec_.size() - 1));
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}
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size_t nextIndex(size_t i) const {
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return i == 0 ? vec_.size() - 1 : i - 1;
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}
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friend class PointerTableIter<P, K, HF, KF>;
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};
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template<class P, class K, class HF, class KF>
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class PointerTableIter {
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public:
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PointerTableIter(const PointerTable<P, K, HF, KF> &);
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const P &next();
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private:
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const PointerTable<P, K, HF, KF> *tablePtr_;
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size_t i_;
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};
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#ifdef SP_NAMESPACE
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}
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#endif
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#endif /* not PointerTable_INCLUDED */
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#ifdef SP_DEFINE_TEMPLATES
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#include "PointerTable.cxx"
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#endif
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