simplewallet: Add Unicode input_line [Ryo backport]

src/common/util.cpp

@@ -939,4 +939,32 @@ std::string get_nix_version_display_string()
     }
     return newval;
   }
+  
+#ifdef _WIN32
+  std::string input_line_win()
+  {
+    HANDLE hConIn = CreateFileW(L"CONIN$", GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, nullptr, OPEN_EXISTING, 0, nullptr);
+    DWORD oldMode;
+
+    FlushConsoleInputBuffer(hConIn);
+    GetConsoleMode(hConIn, &oldMode);
+    SetConsoleMode(hConIn, ENABLE_LINE_INPUT | ENABLE_ECHO_INPUT | ENABLE_PROCESSED_INPUT);
+
+    wchar_t buffer[1024];
+    DWORD read;
+
+    ReadConsoleW(hConIn, buffer, sizeof(buffer)/sizeof(wchar_t)-1, &read, nullptr);
+    buffer[read] = 0;
+
+    SetConsoleMode(hConIn, oldMode);
+    CloseHandle(hConIn);
+  
+    int size_needed = WideCharToMultiByte(CP_UTF8, 0, buffer, -1, NULL, 0, NULL, NULL);
+    std::string buf(size_needed, '\0');
+    WideCharToMultiByte(CP_UTF8, 0, buffer, -1, &buf[0], size_needed, NULL, NULL);
+    buf.pop_back(); //size_needed includes null that we needed to have space for
+    return buf;
+  }
+#endif
+
 }

src/common/util.h

@@ -235,4 +235,7 @@ namespace tools
   boost::optional<std::pair<uint32_t, uint32_t>> parse_subaddress_lookahead(const std::string& str);
 
   std::string glob_to_regex(const std::string &val);
+#ifdef _WIN32
+  std::string input_line_win();
+#endif
 }