ArduinoJson/include/ArduinoJson/Data/Encoding.hpp

// Copyright Benoit Blanchon 2014-2017
// MIT License
//
// Arduino JSON library
// https://github.com/bblanchon/ArduinoJson
// If you like this project, please add a star!

#pragma once

#include "../Print.hpp"

namespace ArduinoJson {
namespace Internals {

class Encoding {
 public:
  // Optimized for code size on a 8-bit AVR
  static char escapeChar(char c) {
    const char *p = escapeTable(false);
    while (p[0] && p[1] != c) {
      p += 2;
    }
    return p[0];
  }

  // Optimized for code size on a 8-bit AVR
  static char unescapeChar(char c) {
    const char *p = escapeTable(true);
    for (;;) {
      if (p[0] == '\0') return c;
      if (p[0] == c) return p[1];
      p += 2;
    }
  }

 private:
  static const char *escapeTable(bool excludeIdenticals) {
    return &"\"\"\\\\b\bf\fn\nr\rt\t"[excludeIdenticals ? 4 : 0];
  }
};
}
}