+#define LOWERCASE(c) ((isalpha(UChar(c)) && isupper(UChar(c))) ? tolower(UChar(c)) : (c))
+
+static int
+CaselessCmp(const char *a, const char *b)
+{ /* strcasecmp isn't portable */
+ while (*a && *b) {
+ int cmp = LOWERCASE(*a) - LOWERCASE(*b);
+ if (cmp != 0)
+ break;
+ a++, b++;
+ }
+ return LOWERCASE(*a) - LOWERCASE(*b);
+}
+