forked from bblanchon/ArduinoJson
aa2ef79e55
* Removed `ArduinoJson::String` * Removed `JsonVariant::defaultValue<T>()` * Removed non-template `JsonObject::get()` and `JsonArray.get()` * Fixed support for `StringSumHelper` (issue #184) * Replaced `ARDUINOJSON_USE_ARDUINO_STRING` by `ARDUINOJSON_ENABLE_STD_STRING` and `ARDUINOJSON_ENABLE_ARDUINO_STRING` (issue #378) * Added example `StringExample.ino` to show where `String` can be used
95 lines
2.2 KiB
C++
95 lines
2.2 KiB
C++
// Copyright Benoit Blanchon 2014-2016
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// MIT License
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//
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// Arduino JSON library
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// https://github.com/bblanchon/ArduinoJson
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// If you like this project, please add a star!
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#pragma once
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#include "../Configuration.hpp"
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#if ARDUINOJSON_ENABLE_ARDUINO_STRING
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#include <WString.h>
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#endif
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#if ARDUINOJSON_ENABLE_STD_STRING
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#include <string>
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#endif
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namespace ArduinoJson {
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namespace Internals {
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template <typename TString>
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struct StringFuncs {};
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template <typename TString>
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struct StringFuncs<const TString> : StringFuncs<TString> {};
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template <typename TString>
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struct StringFuncs<TString&> : StringFuncs<TString> {};
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struct CharPtrFuncs {
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static bool equals(const char* str, const char* expected) {
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return strcmp(str, expected) == 0;
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}
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template <typename Buffer>
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static char* duplicate(const char* str, Buffer* buffer) {
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if (!str) return NULL;
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size_t size = strlen(str) + 1;
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void* dup = buffer->alloc(size);
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if (dup != NULL) memcpy(dup, str, size);
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return static_cast<char*>(dup);
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}
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static const bool has_append = false;
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static const bool should_duplicate = false;
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};
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template <>
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struct StringFuncs<const char*> : CharPtrFuncs {};
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template <>
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struct StringFuncs<char*> : CharPtrFuncs {};
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template <size_t N>
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struct StringFuncs<char[N]> : CharPtrFuncs {};
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template <typename TString>
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struct StdStringFuncs {
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template <typename Buffer>
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static char* duplicate(const TString& str, Buffer* buffer) {
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if (!str.c_str()) return NULL; // <- Arduino string can return NULL
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size_t size = str.length() + 1;
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void* dup = buffer->alloc(size);
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if (dup != NULL) memcpy(dup, str.c_str(), size);
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return static_cast<char*>(dup);
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}
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static bool equals(const TString& str, const char* expected) {
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return str == expected;
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}
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static void append(TString& str, char c) {
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str += c;
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}
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static const bool has_append = true;
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static const bool should_duplicate = true;
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};
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#if ARDUINOJSON_ENABLE_ARDUINO_STRING
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template <>
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struct StringFuncs<String> : StdStringFuncs<String> {};
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template <>
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struct StringFuncs<StringSumHelper> : StdStringFuncs<StringSumHelper> {};
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#endif
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#if ARDUINOJSON_ENABLE_STD_STRING
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template <>
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struct StringFuncs<std::string> : StdStringFuncs<std::string> {};
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#endif
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}
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}
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