Refactored string adapters: only one IsString<T> and adaptString()

src/ArduinoJson/Strings/Adapters/ConstRamStringAdapter.hpp

@@ -0,0 +1,55 @@
+// ArduinoJson - https://arduinojson.org
+// Copyright Benoit Blanchon 2014-2021
+// MIT License
+
+#pragma once
+
+#include <stddef.h>  // size_t
+#include <string.h>  // strcmp
+
+#include <ArduinoJson/Polyfills/safe_strcmp.hpp>
+#include <ArduinoJson/Strings/StoragePolicy.hpp>
+#include <ArduinoJson/Strings/StringAdapter.hpp>
+
+namespace ARDUINOJSON_NAMESPACE {
+
+template <>
+class StringAdapter<const char*> {
+ public:
+  StringAdapter(const char* str = 0) : _str(str) {}
+
+  int compare(const char* other) const {
+    return safe_strcmp(_str, other);
+  }
+
+  bool equals(const char* expected) const {
+    return compare(expected) == 0;
+  }
+
+  bool isNull() const {
+    return !_str;
+  }
+
+  size_t size() const {
+    if (!_str)
+      return 0;
+    return strlen(_str);
+  }
+
+  const char* data() const {
+    return _str;
+  }
+
+  typedef storage_policies::store_by_address storage_policy;
+
+ protected:
+  const char* _str;
+};
+
+template <int N>
+class StringAdapter<const char[N]> : public StringAdapter<const char*> {
+ public:
+  StringAdapter<const char[N]>(const char* s) : StringAdapter<const char*>(s) {}
+};
+
+}  // namespace ARDUINOJSON_NAMESPACE