StdStringWriter.hpp

00001 // ArduinoJson - arduinojson.org
00002 // Copyright Benoit Blanchon 2014-2021
00003 // MIT License
00004 
00005 #pragma once
00006 
00007 #include <ArduinoJson/Namespace.hpp>
00008 #include <ArduinoJson/Polyfills/type_traits.hpp>
00009 
00010 #include <string>
00011 
00012 namespace ARDUINOJSON_NAMESPACE {
00013 
00014 template <class T>
00015 struct is_std_string : false_type {};
00016 
00017 template <class TCharTraits, class TAllocator>
00018 struct is_std_string<std::basic_string<char, TCharTraits, TAllocator> >
00019     : true_type {};
00020 
00021 template <typename TDestination>
00022 class Writer<TDestination,
00023              typename enable_if<is_std_string<TDestination>::value>::type> {
00024  public:
00025   Writer(TDestination &str) : _str(&str) {}
00026 
00027   size_t write(uint8_t c) {
00028     _str->operator+=(static_cast<char>(c));
00029     return 1;
00030   }
00031 
00032   size_t write(const uint8_t *s, size_t n) {
00033     _str->append(reinterpret_cast<const char *>(s), n);
00034     return n;
00035   }
00036 
00037  private:
00038   TDestination *_str;
00039 };
00040 }  // namespace ARDUINOJSON_NAMESPACE