1 files changed, 30 insertions, 0 deletions
diff --git a/libgo/go/os/error_windows.go b/libgo/go/os/error_windows.go
new file mode 100644
index 00000000000..5d692b07362
--- /dev/null
+++ b/libgo/go/os/error_windows.go
@@ -0,0 +1,30 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package os
+
+import "syscall"
+
+func isExist(err error) bool {
+	if pe, ok := err.(*PathError); ok {
+		err = pe.Err
+	}
+	return err == syscall.ERROR_ALREADY_EXISTS ||
+		err == syscall.ERROR_FILE_EXISTS || err == ErrExist
+}
+
+func isNotExist(err error) bool {
+	if pe, ok := err.(*PathError); ok {
+		err = pe.Err
+	}
+	return err == syscall.ERROR_FILE_NOT_FOUND ||
+		err == syscall.ERROR_PATH_NOT_FOUND || err == ErrNotExist
+}
+
+func isPermission(err error) bool {
+	if pe, ok := err.(*PathError); ok {
+		err = pe.Err
+	}
+	return err == ErrPermission
+}