// ArduinoJson - arduinojson.org // Copyright Benoit Blanchon 2014-2018 // MIT License #pragma once #if ARDUINOJSON_ENABLE_STD_STRING || ARDUINOJSON_ENABLE_ARDUINO_STRING #if ARDUINOJSON_ENABLE_ARDUINO_STRING #include <WString.h> #endif #if ARDUINOJSON_ENABLE_STD_STRING #include <string> #endif namespace ArduinoJson { namespace Internals { template <typename TString> struct StdStringTraits { typedef const char* duplicate_t; template <typename Buffer> static duplicate_t duplicate(const TString& str, Buffer* buffer) { if (!str.c_str()) return NULL; // <- Arduino string can return NULL size_t size = str.length() + 1; void* dup = buffer->alloc(size); if (dup != NULL) memcpy(dup, str.c_str(), size); return static_cast<duplicate_t>(dup); } static bool is_null(const TString& str) { // Arduino's String::c_str() can return NULL return !str.c_str(); } struct Reader : CharPointerTraits<char>::Reader { Reader(const TString& str) : CharPointerTraits<char>::Reader(str.c_str()) {} }; static bool equals(const TString& str, const char* expected) { // Arduino's String::c_str() can return NULL const char* actual = str.c_str(); if (!actual || !expected) return actual == expected; return 0 == strcmp(actual, expected); } static void append(TString& str, char c) { str += c; } static void append(TString& str, const char* s) { str += s; } static const bool has_append = true; static const bool has_equals = true; static const bool should_duplicate = true; }; #if ARDUINOJSON_ENABLE_ARDUINO_STRING template <> struct StringTraits<String, void> : StdStringTraits<String> {}; template <> struct StringTraits<StringSumHelper, void> : StdStringTraits<StringSumHelper> { }; #endif #if ARDUINOJSON_ENABLE_STD_STRING template <> struct StringTraits<std::string, void> : StdStringTraits<std::string> {}; #endif } // namespace Internals } // namespace ArduinoJson #endif