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

src/ArduinoJson/Strings/Adapters/StringViewAdapter.hpp

@@ -0,0 +1,50 @@
+// ArduinoJson - https://arduinojson.org
+// Copyright Benoit Blanchon 2014-2021
+// MIT License
+
+#pragma once
+
+#include <ArduinoJson/Namespace.hpp>
+#include <ArduinoJson/Strings/StoragePolicy.hpp>
+#include <ArduinoJson/Strings/StringAdapter.hpp>
+
+#include <string_view>
+
+namespace ARDUINOJSON_NAMESPACE {
+
+template <>
+class StringAdapter<std::string_view> {
+ public:
+  StringAdapter(std::string_view str) : _str(str) {}
+
+  void copyTo(char* p, size_t n) const {
+    memcpy(p, _str.data(), n);
+  }
+
+  bool isNull() const {
+    return false;
+  }
+
+  int compare(const char* other) const {
+    if (!other)
+      return 1;
+    return _str.compare(other);
+  }
+
+  bool equals(const char* expected) const {
+    if (!expected)
+      return false;
+    return _str == expected;
+  }
+
+  size_t size() const {
+    return _str.size();
+  }
+
+  typedef storage_policies::store_by_copy storage_policy;
+
+ private:
+  std::string_view _str;
+};
+
+}  // namespace ARDUINOJSON_NAMESPACE