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String.hpp
00001 // ArduinoJson - arduinojson.org 00002 // Copyright Benoit Blanchon 2014-2021 00003 // MIT License 00004 00005 #pragma once 00006 00007 #include <ArduinoJson/Strings/ConstRamStringAdapter.hpp> 00008 #include <ArduinoJson/Strings/IsString.hpp> 00009 #include <ArduinoJson/Strings/StoragePolicy.hpp> 00010 00011 namespace ARDUINOJSON_NAMESPACE { 00012 00013 class String { 00014 public: 00015 String() : _data(0), _isStatic(true) {} 00016 String(const char* data, bool isStaticData = true) 00017 : _data(data), _isStatic(isStaticData) {} 00018 00019 const char* c_str() const { 00020 return _data; 00021 } 00022 00023 bool isNull() const { 00024 return !_data; 00025 } 00026 00027 bool isStatic() const { 00028 return _isStatic; 00029 } 00030 00031 friend bool operator==(String lhs, String rhs) { 00032 if (lhs._data == rhs._data) 00033 return true; 00034 if (!lhs._data) 00035 return false; 00036 if (!rhs._data) 00037 return false; 00038 return strcmp(lhs._data, rhs._data) == 0; 00039 } 00040 00041 friend bool operator!=(String lhs, String rhs) { 00042 if (lhs._data == rhs._data) 00043 return false; 00044 if (!lhs._data) 00045 return true; 00046 if (!rhs._data) 00047 return true; 00048 return strcmp(lhs._data, rhs._data) != 0; 00049 } 00050 00051 private: 00052 const char* _data; 00053 bool _isStatic; 00054 }; 00055 00056 class StringAdapter : public RamStringAdapter { 00057 public: 00058 StringAdapter(const String& str) 00059 : RamStringAdapter(str.c_str()), _isStatic(str.isStatic()) {} 00060 00061 bool isStatic() const { 00062 return _isStatic; 00063 } 00064 00065 typedef storage_policies::decide_at_runtime storage_policy; 00066 00067 private: 00068 bool _isStatic; 00069 }; 00070 00071 template <> 00072 struct IsString<String> : true_type {}; 00073 00074 inline StringAdapter adaptString(const String& str) { 00075 return StringAdapter(str); 00076 } 00077 } // namespace ARDUINOJSON_NAMESPACE
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