初始化

lib/ArduinoJson/src/ArduinoJson/Serialization/Writers/ArduinoStringWriter.hpp

@@ -0,0 +1,53 @@
+// ArduinoJson - https://arduinojson.org
+// Copyright © 2014-2023, Benoit BLANCHON
+// MIT License
+
+#pragma once
+
+#include <Arduino.h>
+
+ARDUINOJSON_BEGIN_PRIVATE_NAMESPACE
+
+template <>
+class Writer<::String, void> {
+  static const size_t bufferCapacity = ARDUINOJSON_STRING_BUFFER_SIZE;
+
+ public:
+  explicit Writer(::String& str) : _destination(&str) {
+    _size = 0;
+  }
+
+  ~Writer() {
+    flush();
+  }
+
+  size_t write(uint8_t c) {
+    if (_size + 1 >= bufferCapacity)
+      if (flush() != 0)
+        return 0;
+    _buffer[_size++] = static_cast<char>(c);
+    return 1;
+  }
+
+  size_t write(const uint8_t* s, size_t n) {
+    for (size_t i = 0; i < n; i++) {
+      write(s[i]);
+    }
+    return n;
+  }
+
+  size_t flush() {
+    ARDUINOJSON_ASSERT(_size < bufferCapacity);
+    _buffer[_size] = 0;
+    if (_destination->concat(_buffer))
+      _size = 0;
+    return _size;
+  }
+
+ private:
+  ::String* _destination;
+  char _buffer[bufferCapacity];
+  size_t _size;
+};
+
+ARDUINOJSON_END_PRIVATE_NAMESPACE