Extracted StringReader and StringWriter from JsonParser

Split `Internals/` folder into `Data/`, `Deserialization/`, `Serialization/`

include/ArduinoJson/Serialization/Prettyfier.hpp

@@ -0,0 +1,130 @@
+// Copyright Benoit Blanchon 2014-2016
+// MIT License
+//
+// Arduino JSON library
+// https://github.com/bblanchon/ArduinoJson
+// If you like this project, please add a star!
+
+#pragma once
+
+#include "IndentedPrint.hpp"
+
+namespace ArduinoJson {
+namespace Internals {
+
+// Converts a compact JSON string into an indented one.
+class Prettyfier : public Print {
+ public:
+  explicit Prettyfier(IndentedPrint& p) : _sink(p) {
+    _previousChar = 0;
+    _inString = false;
+  }
+
+  virtual size_t write(uint8_t c) {
+    size_t n = _inString ? handleStringChar(c) : handleMarkupChar(c);
+    _previousChar = c;
+    return n;
+  }
+
+ private:
+  Prettyfier& operator=(const Prettyfier&);  // cannot be assigned
+
+  bool inEmptyBlock() {
+    return _previousChar == '{' || _previousChar == '[';
+  }
+
+  size_t handleStringChar(uint8_t c) {
+    bool isQuote = c == '"' && _previousChar != '\\';
+
+    if (isQuote) _inString = false;
+
+    return _sink.write(c);
+  }
+
+  size_t handleMarkupChar(uint8_t c) {
+    switch (c) {
+      case '{':
+      case '[':
+        return writeBlockOpen(c);
+
+      case '}':
+      case ']':
+        return writeBlockClose(c);
+
+      case ':':
+        return writeColon();
+
+      case ',':
+        return writeComma();
+
+      case '"':
+        return writeQuoteOpen();
+
+      default:
+        return writeNormalChar(c);
+    }
+  }
+
+  size_t writeBlockClose(uint8_t c) {
+    size_t n = 0;
+    n += unindentIfNeeded();
+    n += _sink.write(c);
+    return n;
+  }
+
+  size_t writeBlockOpen(uint8_t c) {
+    size_t n = 0;
+    n += indentIfNeeded();
+    n += _sink.write(c);
+    return n;
+  }
+
+  size_t writeColon() {
+    size_t n = 0;
+    n += _sink.write(':');
+    n += _sink.write(' ');
+    return n;
+  }
+
+  size_t writeComma() {
+    size_t n = 0;
+    n += _sink.write(',');
+    n += _sink.println();
+    return n;
+  }
+
+  size_t writeQuoteOpen() {
+    _inString = true;
+    size_t n = 0;
+    n += indentIfNeeded();
+    n += _sink.write('"');
+    return n;
+  }
+
+  size_t writeNormalChar(uint8_t c) {
+    size_t n = 0;
+    n += indentIfNeeded();
+    n += _sink.write(c);
+    return n;
+  }
+
+  size_t indentIfNeeded() {
+    if (!inEmptyBlock()) return 0;
+
+    _sink.indent();
+    return _sink.println();
+  }
+
+  size_t unindentIfNeeded() {
+    if (inEmptyBlock()) return 0;
+
+    _sink.unindent();
+    return _sink.println();
+  }
+
+  uint8_t _previousChar;
+  IndentedPrint& _sink;
+  bool _inString;
+};
+}
+}