symboltable.hh
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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */ 00002 /* 00003 * Main authors: 00004 * Guido Tack <tack@gecode.org> 00005 * 00006 * Copyright: 00007 * Guido Tack, 2007 00008 * 00009 * Last modified: 00010 * $Date: 2010-07-28 16:43:32 +0200 (Wed, 28 Jul 2010) $ by $Author: tack $ 00011 * $Revision: 11293 $ 00012 * 00013 * This file is part of Gecode, the generic constraint 00014 * development environment: 00015 * http://www.gecode.org 00016 * 00017 * Permission is hereby granted, free of charge, to any person obtaining 00018 * a copy of this software and associated documentation files (the 00019 * "Software"), to deal in the Software without restriction, including 00020 * without limitation the rights to use, copy, modify, merge, publish, 00021 * distribute, sublicense, and/or sell copies of the Software, and to 00022 * permit persons to whom the Software is furnished to do so, subject to 00023 * the following conditions: 00024 * 00025 * The above copyright notice and this permission notice shall be 00026 * included in all copies or substantial portions of the Software. 00027 * 00028 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00029 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00030 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00031 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00032 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00033 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00034 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00035 * 00036 */ 00037 00038 #ifndef __GECODE_FLATZINC_SYMBOLTABLE_HH__ 00039 #define __GECODE_FLATZINC_SYMBOLTABLE_HH__ 00040 00041 #include <vector> 00042 00043 #ifdef GECODE_HAS_GNU_HASH_MAP 00044 #include <ext/hash_map> 00045 #else 00046 #include <map> 00047 #endif 00048 00049 namespace Gecode { namespace FlatZinc { 00050 00052 template<class Val> 00053 class SymbolTable { 00054 private: 00055 #ifdef GECODE_HAS_GNU_HASH_MAP 00056 class hashString { 00057 public: 00058 size_t operator ()(const std::string& x) const { 00059 return __gnu_cxx::hash<const char*>()(x.c_str()); 00060 } 00061 }; 00062 typedef __gnu_cxx::hash_map<std::string,Val,hashString> mymap; 00063 #else 00064 typedef std::map<std::string,Val> mymap; 00065 #endif 00066 mymap m; 00067 public: 00069 bool put(const std::string& key, const Val& val); 00071 bool get(const std::string& key, Val& val) const; 00072 }; 00073 00074 template<class Val> 00075 bool 00076 SymbolTable<Val>::put(const std::string& key, const Val& val) { 00077 typename mymap::const_iterator i = m.find(key); 00078 bool fresh = (i == m.end()); 00079 m[key] = val; 00080 return fresh; 00081 } 00082 00083 template<class Val> 00084 bool 00085 SymbolTable<Val>::get(const std::string& key, Val& val) const { 00086 typename mymap::const_iterator i = m.find(key); 00087 if (i == m.end()) 00088 return false; 00089 val = i->second; 00090 return true; 00091 } 00092 00093 }} 00094 #endif 00095 00096 // STATISTICS: flatzinc-any