58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
/* Copyright (C) 2009 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* shared storage for strings
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*/
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#ifndef INCLUDED_STRING_POOL
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#define INCLUDED_STRING_POOL
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#include "lib/adts.h" // DynHashTbl
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#include "pool.h"
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class StringPool
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{
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public:
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StringPool(size_t maxSize);
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~StringPool();
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/**
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* allocate a copy of the string.
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*
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* @return a unique pointer for the string (addresses are equal iff
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* the string contents match). can return 0, but would raise a
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* warning first.
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**/
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const char* UniqueCopy(const char* string);
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bool Contains(const char* string) const;
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const char* RandomString() const;
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private:
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// rationale: we want an O(1) Contains() so that redundant UniqueCopy
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// calls are cheap. that requires allocating from one contiguous arena,
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// which is also more memory-efficient than the heap (no headers).
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Pool m_pool;
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typedef DynHashTbl<const char*, const char*> Map;
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Map m_map;
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};
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#endif // #ifndef INCLUDED_STRING_POOL
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