Introduce WindowsScopedCodePage RAII class

src/bitcoin-cli.cpp

@@ -1315,6 +1315,7 @@ MAIN_FUNCTION
 #ifdef WIN32
     common::WinCmdLineArgs winArgs;
     std::tie(argc, argv) = winArgs.get();
+    common::WindowsScopedCodePage windows_terminal_output_code_page{CP_UTF8};
 #endif
     SetupEnvironment();
     if (!SetupNetworking()) {

src/bitcoin-wallet.cpp

@@ -100,6 +100,7 @@ MAIN_FUNCTION
 #ifdef WIN32
     common::WinCmdLineArgs winArgs;
     std::tie(argc, argv) = winArgs.get();
+    common::WindowsScopedCodePage windows_terminal_output_code_page{CP_UTF8};
 #endif
 
     int exit_status;

src/bitcoind.cpp

@@ -257,6 +257,7 @@ MAIN_FUNCTION
 #ifdef WIN32
     common::WinCmdLineArgs winArgs;
     std::tie(argc, argv) = winArgs.get();
+    common::WindowsScopedCodePage windows_terminal_output_code_page{CP_UTF8};
 #endif
 
     NodeContext node;

src/common/args.cpp

@@ -889,5 +889,16 @@ std::pair<int, char**> WinCmdLineArgs::get()
 {
     return std::make_pair(argc, argv);
 }
+
+WindowsScopedCodePage::WindowsScopedCodePage(UINT new_console_outp_code_page)
+    : m_original_code_page{GetConsoleOutputCP()}
+{
+    SetConsoleOutputCP(new_console_outp_code_page);
+}
+
+WindowsScopedCodePage::~WindowsScopedCodePage()
+{
+    SetConsoleOutputCP(m_original_code_page);
+}
 #endif
 } // namespace common

src/common/args.h

@@ -492,6 +492,19 @@ private:
     char** argv;
     std::vector<std::string> args;
 };
+
+/**
+ * A RAII-style class for temporarily changing the terminal output code page during runtime.
+ */
+class WindowsScopedCodePage
+{
+public:
+    WindowsScopedCodePage(UINT new_console_outp_code_page);
+    ~WindowsScopedCodePage();
+
+private:
+    UINT m_original_code_page;
+};
 #endif
 } // namespace common
 

src/qt/bitcoin.cpp

@@ -481,6 +481,7 @@ int GuiMain(int argc, char* argv[])
 #ifdef WIN32
     common::WinCmdLineArgs winArgs;
     std::tie(argc, argv) = winArgs.get();
+    common::WindowsScopedCodePage windows_terminal_output_code_page{CP_UTF8};
 #endif
 
     std::unique_ptr<interfaces::Init> init = interfaces::MakeGuiInit(argc, argv);