From 0e4c7408596ecad7888cc138046420e7e4ac2bfb Mon Sep 17 00:00:00 2001
From: Nodir Temirkhodjaev <nodir.temir@gmail.com>
Date: Sun, 3 Sep 2017 22:50:15 +0500
Subject: [PATCH] Add Device.getLastErrorMessage()

---
 src/ui/util/device.cpp | 19 +++++++++++++++++++
 src/ui/util/device.h   |  2 ++
 2 files changed, 21 insertions(+)

diff --git a/src/ui/util/device.cpp b/src/ui/util/device.cpp
index 703be99d..fb09f271 100644
--- a/src/ui/util/device.cpp
+++ b/src/ui/util/device.cpp
@@ -56,3 +56,22 @@ bool Device::ioctl(int code, char *in, int inSize,
 
     return res;
 }
+
+QString Device::getLastErrorMessage()
+{
+    const DWORD err = GetLastError();
+    LPWSTR buf = nullptr;
+
+    FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER
+                   | FORMAT_MESSAGE_FROM_SYSTEM
+                   | FORMAT_MESSAGE_IGNORE_INSERTS,
+                   NULL, err, 0, (LPWSTR) &buf, 0, NULL);
+
+    if (!buf) {
+        return QString("System Error %1").arg(err);
+    }
+
+    const QString text = QString::fromUtf16((const ushort *) buf).trimmed();
+    LocalFree(buf);
+    return text;
+}
diff --git a/src/ui/util/device.h b/src/ui/util/device.h
index 87f005fa..a1ddf7d9 100644
--- a/src/ui/util/device.h
+++ b/src/ui/util/device.h
@@ -11,6 +11,8 @@ public:
     explicit Device(QObject *parent = nullptr);
     virtual ~Device();
 
+    static QString getLastErrorMessage();
+
 signals:
 
 public slots: