1 files changed, 110 insertions, 0 deletions
diff --git a/zen/last_error.h b/zen/last_error.h
new file mode 100644
index 00000000..d2eaebfc
--- /dev/null
+++ b/zen/last_error.h
@@ -0,0 +1,110 @@
+// **************************************************************************
+// * This file is part of the FreeFileSync project. It is distributed under *
+// * GNU General Public License: http://www.gnu.org/licenses/gpl.html       *
+// * Copyright (C) 2008-2011 ZenJu (zhnmju123 AT gmx.de)                    *
+// **************************************************************************
+
+#ifndef SYSTEMFUNCTIONS_H_INCLUDED
+#define SYSTEMFUNCTIONS_H_INCLUDED
+
+#include <string>
+#include "utf8.h"
+#include "i18n.h"
+
+#ifdef FFS_WIN
+#include "win.h" //includes "windows.h"
+
+#elif defined FFS_LINUX
+#include <cstring>
+#include <cerrno>
+#endif
+
+
+
+namespace zen
+{
+//evaluate GetLastError()/errno and assemble specific error message
+#ifdef FFS_WIN
+std::wstring getLastErrorFormatted(DWORD lastError = 0);
+#elif defined FFS_LINUX
+std::wstring getLastErrorFormatted(int lastError = 0);
+#endif
+
+
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+
+//######################## Implementation ########################
+
+#ifdef FFS_WIN
+inline
+std::wstring getLastErrorFormatted(DWORD lastError) //try to get additional Windows error information
+{
+    //determine error code if none was specified
+    if (lastError == 0)
+        lastError = ::GetLastError();
+
+    std::wstring output = _("Windows Error Code %x:");
+    replace(output, L"%x", toString<std::wstring>(lastError));
+
+    LPWSTR buffer = NULL;
+    if (::FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM    |
+                        FORMAT_MESSAGE_MAX_WIDTH_MASK |
+                        FORMAT_MESSAGE_IGNORE_INSERTS | //important: without this flag ::FormatMessage() will fail if message contains placeholders
+                        FORMAT_MESSAGE_ALLOCATE_BUFFER, NULL, lastError, 0, reinterpret_cast<LPWSTR>(&buffer), 0, NULL) != 0)
+    {
+        if (buffer) //just to be sure
+        {
+            output += L" ";
+            output += buffer;
+            ::LocalFree(buffer);
+        }
+    }
+    ::SetLastError(lastError); //restore last error
+    return output;
+}
+
+#elif defined FFS_LINUX
+inline
+std::wstring getLastErrorFormatted(int lastError) //try to get additional Linux error information
+{
+    //determine error code if none was specified
+    if (lastError == 0)
+        lastError = errno; //don't use "::", errno is a macro!
+
+    std::wstring output = _("Linux Error Code %x:");
+    replace(output, L"%x", toString<std::wstring>(lastError));
+
+    output += L" ";
+    output += utf8CvrtTo<std::wstring>(::strerror(lastError));
+
+    errno = lastError; //restore errno
+    return output;
+}
+#endif
+}
+
+
+#endif // SYSTEMFUNCTIONS_H_INCLUDED