1 files changed, 39 insertions, 0 deletions
diff --git a/um/service/src/windows_error.cpp b/um/service/src/windows_error.cpp
new file mode 100644
index 0000000..f27018b
--- /dev/null
+++ b/um/service/src/windows_error.cpp
@@ -0,0 +1,39 @@
+// Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
+// This file is part of the "Windows 7 drivers" project.
+// For details, see https://github.com/egor-tensin/windows7-drivers.
+// Distributed under the MIT License.
+
+#include "libservice/all.hpp"
+
+#include <Windows.h>
+
+#include <string>
+
+namespace libservice
+{
+    std::string WindowsErrorCategory::message(int code) const
+    {
+        char* buf_ptr;
+
+        const auto nbwritten = FormatMessageA(
+            FORMAT_MESSAGE_ALLOCATE_BUFFER
+                | FORMAT_MESSAGE_FROM_SYSTEM
+                | FORMAT_MESSAGE_IGNORE_INSERTS,
+            NULL,
+            code,
+            MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+            reinterpret_cast<char*>(&buf_ptr),
+            0,
+            NULL);
+
+        if (0 == nbwritten)
+        {
+            LocalFree(buf_ptr);
+            return "Couldn't format error message";
+        }
+
+        std::string str(buf_ptr, nbwritten - 2);
+        LocalFree(buf_ptr);
+        return str;
+    }
+}