#define isIDFIRST_lazy(p) isIDFIRST_lazy_if(p,1)
#define isALNUM_lazy(p) isALNUM_lazy_if(p,1)
-#define UTF8_MAXLEN 13 /* how wide can a single UTF8 encoded character become */
+/* how wide can a single UTF8 encoded character become */
+#define UTF8_MAXLEN 13
+/* how wide a character can become when upper/lowercased */
+#define UTF8_MAXLEN_UCLC (UTF8_MAXLEN*2)
+/* how wide a character can become when casefolded */
+#define UTF8_MAXLEN_FOLD (UTF8_MAXLEN*3)
#define IN_BYTES (PL_curcop->op_private & HINT_BYTES)
#define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTES)
UTF8_ALLOW_SURROGATE|UTF8_ALLOW_BOM|\
UTF8_ALLOW_FFFF|UTF8_ALLOW_LONG)
#define UTF8_ALLOW_ANY 0x00ff
-#define UTF8_CHECK_ONLY 0x0100
+#define UTF8_CHECK_ONLY 0x0200
#define UNICODE_SURROGATE_FIRST 0xd800
#define UNICODE_SURROGATE_LAST 0xdfff
#define UNICODE_BYTER_ORDER_MARK 0xfffe
#define UNICODE_ILLEGAL 0xffff
+/* Though our UTF-8 encoding can go beyond this,
+ * let's be conservative. */
+#define PERL_UNICODE_MAX 0x10FFFF
+
+#define UNICODE_ALLOW_SURROGATE 0x0001 /* Allow UTF-16 surrogates (EVIL) */
+#define UNICODE_ALLOW_FDD0 0x0002 /* Allow the U+FDD0...U+FDEF */
+#define UNICODE_ALLOW_FFFE 0x0004 /* Allow 0xFFFE, 0x1FFFE, ... */
+#define UNICODE_ALLOW_FFFF 0x0008 /* Allow 0xFFFE, 0x1FFFE, ... */
+#define UNICODE_ALLOW_SUPER 0x0010 /* Allow past 10xFFFF */
+#define UNICODE_ALLOW_ANY 0xFFFF
+
#define UNICODE_IS_SURROGATE(c) ((c) >= UNICODE_SURROGATE_FIRST && \
(c) <= UNICODE_SURROGATE_LAST)
#define UNICODE_IS_REPLACEMENT(c) ((c) == UNICODE_REPLACEMENT)