Don't try to use reserved device name on win32

moo/mooutils/moofiledialog.c

@@ -16,6 +16,7 @@
 #include "mooutils/mooprefs.h"
 #include "mooutils/mooutils-misc.h"
 #include "mooutils/moocompat.h"
+#include <string.h>
 
 
 struct _MooFileDialogPrivate {
@@ -454,6 +455,58 @@ set_filenames (MooFileDialog *dialog,
 }
 
 
+static gboolean
+filename_is_valid (G_GNUC_UNUSED const char *filename,
+                   G_GNUC_UNUSED char      **msg)
+{
+#ifndef __WIN32__
+    return TRUE;
+#else
+    struct name {
+        const char *name;
+        guint len;
+    } names[] = {
+        { "con", 3 }, { "aux", 3 }, { "prn", 3 }, { "nul", 3 },
+        { "com1", 4 }, { "com2", 4 }, { "com3", 4 }, { "com4", 4 },
+        { "lpt1", 4 }, { "lpt2", 4 }, { "lpt3", 4 }
+    };
+    guint i;
+    const char *basename;
+    gboolean invalid = FALSE;
+
+    basename = strrchr (filename, '\\');
+
+    if (!basename)
+        basename = strrchr (filename, '/');
+
+    if (!basename)
+        basename = filename;
+    else
+        basename += 1;
+
+    for (i = 0; i < G_N_ELEMENTS (names); ++i)
+    {
+        if (!g_ascii_strncasecmp (basename, names[i].name, names[i].len))
+        {
+            if (!basename[names[i].len] || basename[names[i].len] == '.')
+                invalid = TRUE;
+            break;
+        }
+    }
+
+    if (invalid)
+    {
+        char *base = g_path_get_basename (filename);
+        *msg = g_strdup_printf ("Filename '%s' is a reserved device name.\n"
+                                "Please choose another name", base);
+        g_free (base);
+        return FALSE;
+    }
+
+    return TRUE;
+#endif
+}
+
 
 gboolean
 moo_file_dialog_run (MooFileDialog *dialog)
@@ -493,9 +546,17 @@ moo_file_dialog_run (MooFileDialog *dialog)
             {
                 if (GTK_RESPONSE_OK == gtk_dialog_run (GTK_DIALOG (filechooser)))
                 {
+                    char *msg;
+
                     filename = file_chooser_get_filename (filechooser);
 
-                    if (g_file_test (filename, G_FILE_TEST_EXISTS) &&
+                    if (!filename_is_valid (filename, &msg))
+                    {
+                        moo_error_dialog (filechooser, msg, NULL);
+                        g_free (filename);
+                        g_free (msg);
+                    }
+                    else if (g_file_test (filename, G_FILE_TEST_EXISTS) &&
                              ! g_file_test (filename, G_FILE_TEST_IS_REGULAR))
                     {
                         moo_error_dialog (filechooser,