+int check_submodule_name(const char *name)
+{
+ /* Disallow empty names */
+ if (!*name)
+ return -1;
+
+ /*
+ * Look for '..' as a path component. Check both '/' and '\\' as
+ * separators rather than is_dir_sep(), because we want the name rules
+ * to be consistent across platforms.
+ */
+ goto in_component; /* always start inside component */
+ while (*name) {
+ char c = *name++;
+ if (c == '/' || c == '\\') {
+in_component:
+ if (name[0] == '.' && name[1] == '.' &&
+ (!name[2] || name[2] == '/' || name[2] == '\\'))
+ return -1;
+ }
+ }
+
+ return 0;
+}
+