1 // Copyright 2016 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #ifndef CORE_FXCRT_STRING_POOL_TEMPLATE_H_ 8 #define CORE_FXCRT_STRING_POOL_TEMPLATE_H_ 9 10 #include <unordered_set> 11 12 #include "core/fxcrt/fx_string.h" 13 14 namespace fxcrt { 15 16 template <typename StringType> 17 class StringPoolTemplate { 18 public: 19 StringType Intern(const StringType& str) { return *m_Pool.insert(str).first; } 20 void Clear() { m_Pool.clear(); } 21 22 private: 23 std::unordered_set<StringType> m_Pool; 24 }; 25 26 extern template class StringPoolTemplate<ByteString>; 27 extern template class StringPoolTemplate<WideString>; 28 29 } // namespace fxcrt 30 31 using fxcrt::StringPoolTemplate; 32 33 using ByteStringPool = StringPoolTemplate<ByteString>; 34 using WideStringPool = StringPoolTemplate<WideString>; 35 36 #endif // CORE_FXCRT_STRING_POOL_TEMPLATE_H_ 37
