+#define UTF8_MAXBYTES 13
+/* How wide can a single UTF-8 encoded character become in bytes.
+ * NOTE: Strictly speaking Perl's UTF-8 should not be called UTF-8
+ * since UTF-8 is an encoding of Unicode and given Unicode's current
+ * upper limit only four bytes is possible. Perl thinks of UTF-8
+ * as a way to encode non-negative integers in a binary format. */
+#define UTF8_MAXLEN UTF8_MAXBYTES
+
+#define UTF8_MAXLEN_UCLC 3 /* Obsolete, do not use. */
+#define UTF8_MAXLEN_UCLC_MULT 39 /* Obsolete, do not use. */
+#define UTF8_MAXLEN_FOLD 3 /* Obsolete, do not use. */
+#define UTF8_MAXLEN_FOLD_MULT 39 /* Obsolete, do not use. */
+
+/* The maximum number of UTF-8 bytes a single Unicode character can
+ * uppercase/lowercase/fold into; this number depends on the Unicode
+ * version. An example of maximal expansion is the U+03B0 which
+ * uppercases to U+03C5 U+0308 U+0301. The Unicode databases that
+ * tell these things are UnicodeDatabase.txt, CaseFolding.txt, and
+ * SpecialCasing.txt. */
+#define UTF8_MAXBYTES_CASE 6
+
+#define IN_BYTES (CopHINTS_get(PL_curcop) & HINT_BYTES)
+#define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTES)
+
+#define UTF8_ALLOW_EMPTY 0x0001
+#define UTF8_ALLOW_CONTINUATION 0x0002
+#define UTF8_ALLOW_NON_CONTINUATION 0x0004
+#define UTF8_ALLOW_FE_FF 0x0008 /* Allow above 0x7fffFFFF */
+#define UTF8_ALLOW_SHORT 0x0010
+#define UTF8_ALLOW_SURROGATE 0x0020
+#define UTF8_ALLOW_FFFF 0x0040 /* Allow UNICODE_ILLEGAL */
+#define UTF8_ALLOW_LONG 0x0080
+#define UTF8_ALLOW_ANYUV (UTF8_ALLOW_EMPTY|UTF8_ALLOW_FE_FF|\
+ UTF8_ALLOW_SURROGATE|UTF8_ALLOW_FFFF)
+#define UTF8_ALLOW_ANY 0x00FF
+#define UTF8_CHECK_ONLY 0x0200
+#define UTF8_ALLOW_DEFAULT (ckWARN(WARN_UTF8) ? 0 : \
+ UTF8_ALLOW_ANYUV)
+
+#define UNICODE_SURROGATE_FIRST 0xD800
+#define UNICODE_SURROGATE_LAST 0xDFFF
+#define UNICODE_REPLACEMENT 0xFFFD
+#define UNICODE_BYTE_ORDER_MARK 0xFEFF
+#define UNICODE_ILLEGAL 0xFFFF
+
+/* Though our UTF-8 encoding can go beyond this,
+ * let's be conservative and do as Unicode 3.2 says. */
+#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_FFFF 0x0004 /* Allow U+FFF[EF], U+1FFF[EF], ... */
+#define UNICODE_ALLOW_SUPER 0x0008 /* Allow past 0x10FFFF */
+#define UNICODE_ALLOW_ANY 0x000F
+
+#define UNICODE_IS_SURROGATE(c) ((c) >= UNICODE_SURROGATE_FIRST && \
+ (c) <= UNICODE_SURROGATE_LAST)
+#define UNICODE_IS_REPLACEMENT(c) ((c) == UNICODE_REPLACEMENT)
+#define UNICODE_IS_BYTE_ORDER_MARK(c) ((c) == UNICODE_BYTE_ORDER_MARK)
+#define UNICODE_IS_ILLEGAL(c) ((c) == UNICODE_ILLEGAL)
+
+#ifdef HAS_QUAD
+# define UTF8_QUAD_MAX UINT64_C(0x1000000000)
+#endif
+
+#define UTF8_IS_ASCII(c) UTF8_IS_INVARIANT(c)
+
+#define UNICODE_LATIN_SMALL_LETTER_SHARP_S 0x00DF
+#define UNICODE_GREEK_CAPITAL_LETTER_SIGMA 0x03A3
+#define UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA 0x03C2
+#define UNICODE_GREEK_SMALL_LETTER_SIGMA 0x03C3
+
+#define EBCDIC_LATIN_SMALL_LETTER_SHARP_S 0x0059
+
+#define UNI_DISPLAY_ISPRINT 0x0001
+#define UNI_DISPLAY_BACKSLASH 0x0002
+#define UNI_DISPLAY_QQ (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
+#define UNI_DISPLAY_REGEX (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)