#define IN_BYTE (PL_curcop->op_private & HINT_BYTE)
#define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTE)
-#define UTF8_ALLOW_CONTINUATION 0x0001
-#define UTF8_ALLOW_NON_CONTINUATION 0x0002
-#define UTF8_ALLOW_FE_FF 0x0004
-#define UTF8_ALLOW_SHORT 0x0008
-#define UTF8_ALLOW_SURROGATE 0x0010
-#define UTF8_ALLOW_BOM 0x0020
-#define UTF8_ALLOW_FFFF 0x0040
-#define UTF8_ALLOW_LONG 0x0080
-#define UTF8_ALLOW_ANYUV (UTF8_ALLOW_FE_FF|UTF8_ALLOW_FFFF \
- |UTF8_ALLOW_BOM|UTF8_ALLOW_SURROGATE)
+#define UTF8_ALLOW_EMPTY 0x0001
+#define UTF8_ALLOW_CONTINUATION 0x0002
+#define UTF8_ALLOW_NON_CONTINUATION 0x0004
+#define UTF8_ALLOW_FE_FF 0x0008
+#define UTF8_ALLOW_SHORT 0x0010
+#define UTF8_ALLOW_SURROGATE 0x0020
+#define UTF8_ALLOW_BOM 0x0040
+#define UTF8_ALLOW_FFFF 0x0080
+#define UTF8_ALLOW_LONG 0x0100
+#define UTF8_ALLOW_ANYUV (UTF8_ALLOW_EMPTY|UTF8_ALLOW_FE_FF|\
+ UTF8_ALLOW_SURROGATE|UTF8_ALLOW_BOM|\
+ UTF8_ALLOW_FFFF|UTF8_ALLOW_LONG)
#define UTF8_ALLOW_ANY 0x00ff
#define UTF8_CHECK_ONLY 0x0100