+static int
+string_enum_compare(const char *str1, const char *str2, int len)
+{
+ size_t i;
+
+#define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
+
+ /* Diff-Header == DIFF_HEADER */
+ for (i = 0; i < len; i++) {
+ if (toupper(str1[i]) == toupper(str2[i]))
+ continue;
+
+ if (string_enum_sep(str1[i]) &&
+ string_enum_sep(str2[i]))
+ continue;
+
+ return str1[i] - str2[i];
+ }
+
+ return 0;
+}
+