From e8db619e631a5791fb6cd259754d1ad223504f48 Mon Sep 17 00:00:00 2001
From: Martin Brodbeck <martin@brodbeck-online.de>
Date: Wed, 8 Aug 2018 15:55:35 +0200
Subject: [PATCH] test

---
 src/core/utils.cpp | 47 ++++++++++++++++++++++++++++++++++++++++++++--
 src/core/utils.h   |  9 +++++++++
 2 files changed, 54 insertions(+), 2 deletions(-)

diff --git a/src/core/utils.cpp b/src/core/utils.cpp
index da33ada..95930c0 100644
--- a/src/core/utils.cpp
+++ b/src/core/utils.cpp
@@ -13,9 +13,52 @@ std::string formatCentAsEuroString(const int cent, int width)
         currStream << std::right << std::setw(width) << std::showbase
                    << std::put_money(cent, false);
     } catch (std::runtime_error& err) {
-        currStream << std::fixed << std::setw(width >= 4 ? width - 4 : width) << std::setprecision(2) << cent / 100.0L
-                   << " €";
+        currStream << std::fixed << std::setw(width >= 4 ? width - 4 : width)
+                   << std::setprecision(2) << cent / 100.0L << " €";
     }
 
     return currStream.str();
 }
+
+#ifdef _WIN32
+// UTF-16 -> UTF-8 conversion
+const std::string convert_to_utf8(const std::wstring& utf16_string)
+{
+    // get length
+    int length =
+        WideCharToMultiByte(CP_UTF8, 0, utf16_string.c_str(), static_cast<int>(utf16_string.size()),
+                            nullptr, 0, nullptr, nullptr);
+    if (!(length > 0))
+        return std::string();
+    else {
+        string result;
+        result.resize(static_cast<std::string::size_type>(length));
+
+        if (WideCharToMultiByte(CP_UTF8, 0, utf16_string.c_str(),
+                                static_cast<int>(utf16_string.size()), &result[0],
+                                static_cast<int>(result.size()), nullptr, nullptr) == 0)
+            throw error("Failure to execute convert_to_utf8: call to WideCharToMultiByte failed.");
+        else
+            return result;
+    }
+}
+// UTF-8 -> UTF-16 conversion
+const std::wstring convert_to_utf16(const std::string& utf8_string)
+{
+  // get length
+  int length = MultiByteToWideChar(CP_UTF8, 0, utf8_string.c_str(), static_cast<int>(utf8_string.size()), nullptr, 0);
+  if(!(length > 0))
+    return std::wstring();
+  else
+  {
+    wstring result;
+    result.resize(static_cast<std::string::size_type>(length));
+
+    if(MultiByteToWideChar(CP_UTF8, 0, utf8_string.c_str(), static_cast<int>(utf8_string.size()),
+                           &result[0], static_cast<int>(result.size())) == 0 )
+      throw error("Failure to execute convert_to_utf16: call to MultiByteToWideChar failed.");
+    else
+      return result;
+  }
+}
+#endif
\ No newline at end of file
diff --git a/src/core/utils.h b/src/core/utils.h
index a2adb20..565a257 100644
--- a/src/core/utils.h
+++ b/src/core/utils.h
@@ -3,6 +3,15 @@
 
 #include <string>
 
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
 std::string formatCentAsEuroString(const int cent, int width = 10);
 
+#ifdef __WIN32
+const std::string convert_to_utf8(const std::wstring& utf16_string);
+const std::wstring convert_to_utf16(const std::string& utf8_string);
+#endif
+
 #endif
\ No newline at end of file