OrcLib: Text: add enum class Encoding

src/OrcLib/CMakeLists.txt

@@ -531,8 +531,10 @@ source_group(In&Out\\TableOutput\\ApacheOrc
 set(SRC_TEXT
     "Text/Console.h"
     "Text/Console.cpp"
-    "Text/Iconv.cpp"
+    "Text/Encoding.h"
+    "Text/Encoding.cpp"
     "Text/Iconv.h"
+    "Text/Iconv.cpp"
     "Text/Format.h"
     "Text/HexDump.h"
     "Text/Tree.h"

src/OrcLib/Text/Encoding.cpp

@@ -0,0 +1,47 @@
+//
+// SPDX-License-Identifier: LGPL-2.1-or-later
+//
+// Copyright © 2021 ANSSI. All Rights Reserved.
+//
+// Author(s): fabienfl
+//
+
+#include "Encoding.h"
+
+#include <string>
+
+namespace Orc {
+
+constexpr std::wstring_view kUtf8 = L"utf-8";
+constexpr std::wstring_view kUtf16 = L"utf-16";
+constexpr std::wstring_view kUnknown = L"unknown";
+
+std::wstring_view ToString(Text::Encoding encoding)
+{
+    switch (encoding)
+    {
+        case Text::Encoding::Utf8:
+            return kUtf8;
+        case Text::Encoding::Utf16:
+            return kUtf16;
+        default:
+            return kUnknown;
+    }
+}
+
+Text::Encoding ToEncoding(const std::wstring& disposition, std::error_code& ec)
+{
+    const std::map<std::wstring_view, Text::Encoding> map = {
+        {kUtf8, Text::Encoding::Utf8}, {kUtf16, Text::Encoding::Utf16}};
+
+    auto it = map.find(disposition);
+    if (it == std::cend(map))
+    {
+        ec = std::make_error_code(std::errc::invalid_argument);
+        return Text::Encoding::Unknown;
+    }
+
+    return it->second;
+}
+
+}  // namespace Orc

src/OrcLib/Text/Encoding.h

@@ -0,0 +1,29 @@
+//
+// SPDX-License-Identifier: LGPL-2.1-or-later
+//
+// Copyright © 2021 ANSSI. All Rights Reserved.
+//
+// Author(s): fabienfl
+//
+
+#pragma once
+
+#include <string_view>
+#include <string>
+
+namespace Orc {
+namespace Text {
+
+enum class Encoding
+{
+    Unknown,
+    Utf8,
+    Utf16,
+};
+
+}  // namespace Text
+
+std::wstring_view ToString(Text::Encoding encoding);
+Text::Encoding ToEncoding(const std::wstring& encoding, std::error_code& ec = std::error_code());
+
+}  // namespace Orc