Document a bunch of foo_nocontext functions

[perl5.git] / utf8.h

diff --git a/utf8.h b/utf8.h
index 0fbe4b7..9a2aea9 100644 (file)
--- a/utf8.h
+++ b/utf8.h
@@ -14,8 +14,8 @@
  *
  */
 
  *
  */
 

-#ifndef H_UTF8      /* Guard against recursive inclusion */
-#define H_UTF8 1
+#ifndef PERL_UTF8_H_      /* Guard against recursive inclusion */
+#define PERL_UTF8_H_ 1

 
 /* Use UTF-8 as the default script encoding?
  * Turning this on will break scripts having non-UTF-8 binary
 
 /* Use UTF-8 as the default script encoding?
  * Turning this on will break scripts having non-UTF-8 binary


@@ -34,11 +34,6 @@
 #define FOLD_FLAGS_FULL         0x2
 #define FOLD_FLAGS_NOMIX_ASCII  0x4
 
 #define FOLD_FLAGS_FULL         0x2
 #define FOLD_FLAGS_NOMIX_ASCII  0x4
 

-/* For _core_swash_init(), internal core use only */
-#define _CORE_SWASH_INIT_USER_DEFINED_PROPERTY 0x1
-#define _CORE_SWASH_INIT_RETURN_IF_UNDEF       0x2
-#define _CORE_SWASH_INIT_ACCEPT_INVLIST        0x4
-

 /*
 =head1 Unicode Support
 L<perlguts/Unicode Support> has an introduction to this API.
 /*
 =head1 Unicode Support
 L<perlguts/Unicode Support> has an introduction to this API.


@@ -66,26 +61,22 @@ the string is invariant.
 #define is_ascii_string(s, len)     is_utf8_invariant_string(s, len)
 #define is_invariant_string(s, len) is_utf8_invariant_string(s, len)
 
 #define is_ascii_string(s, len)     is_utf8_invariant_string(s, len)
 #define is_invariant_string(s, len) is_utf8_invariant_string(s, len)
 

+#define uvoffuni_to_utf8_flags(d,uv,flags)                                     \
+                               uvoffuni_to_utf8_flags_msgs(d, uv, flags, 0)

 #define uvchr_to_utf8(a,b)          uvchr_to_utf8_flags(a,b,0)
 #define uvchr_to_utf8_flags(d,uv,flags)                                        \
 #define uvchr_to_utf8(a,b)          uvchr_to_utf8_flags(a,b,0)
 #define uvchr_to_utf8_flags(d,uv,flags)                                        \

-                            uvoffuni_to_utf8_flags(d,NATIVE_TO_UNI(uv),flags)
+                                    uvchr_to_utf8_flags_msgs(d,uv,flags, 0)
+#define uvchr_to_utf8_flags_msgs(d,uv,flags,msgs)                              \
+                uvoffuni_to_utf8_flags_msgs(d,NATIVE_TO_UNI(uv),flags, msgs)

 #define utf8_to_uvchr_buf(s, e, lenp)                                          \
 #define utf8_to_uvchr_buf(s, e, lenp)                                          \

-                     utf8n_to_uvchr(s, (U8*)(e) - (U8*)(s), lenp,              \
-                                    ckWARN_d(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY)
+            utf8_to_uvchr_buf_helper((const U8 *) (s), (const U8 *) e, lenp)

 #define utf8n_to_uvchr(s, len, lenp, flags)                                    \
                                 utf8n_to_uvchr_error(s, len, lenp, flags, 0)
 #define utf8n_to_uvchr(s, len, lenp, flags)                                    \
                                 utf8n_to_uvchr_error(s, len, lenp, flags, 0)

+#define utf8n_to_uvchr_error(s, len, lenp, flags, errors)                      \
+                        utf8n_to_uvchr_msgs(s, len, lenp, flags, errors, 0)

 
 #define to_uni_fold(c, p, lenp) _to_uni_fold_flags(c, p, lenp, FOLD_FLAGS_FULL)
 
 
 #define to_uni_fold(c, p, lenp) _to_uni_fold_flags(c, p, lenp, FOLD_FLAGS_FULL)
 

-#define to_utf8_fold(s, r, lenr)                                                \
-    _to_utf8_fold_flags (s, NULL, r, lenr, FOLD_FLAGS_FULL, __FILE__, __LINE__)
-#define to_utf8_lower(s, r, lenr)                                               \
-                  _to_utf8_lower_flags(s, NULL, r ,lenr, 0, __FILE__, __LINE__)
-#define to_utf8_upper(s, r, lenr)                                               \
-                  _to_utf8_upper_flags(s, NULL, r, lenr, 0, __FILE__, __LINE__)
-#define to_utf8_title(s, r, lenr)                                               \
-                  _to_utf8_title_flags(s, NULL, r, lenr ,0, __FILE__, __LINE__)
-

 #define foldEQ_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2) \
                    foldEQ_utf8_flags(s1, pe1, l1, u1, s2, pe2, l2, u2, 0)
 #define FOLDEQ_UTF8_NOMIX_ASCII   (1 << 0)
 #define foldEQ_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2) \
                    foldEQ_utf8_flags(s1, pe1, l1, u1, s2, pe2, l2, u2, 0)
 #define FOLDEQ_UTF8_NOMIX_ASCII   (1 << 0)


@@ -95,9 +86,6 @@ the string is invariant.
 #define FOLDEQ_S1_FOLDS_SANE      (1 << 4)
 #define FOLDEQ_S2_FOLDS_SANE      (1 << 5)
 
 #define FOLDEQ_S1_FOLDS_SANE      (1 << 4)
 #define FOLDEQ_S2_FOLDS_SANE      (1 << 5)
 

-#define ibcmp_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2) \
-                   cBOOL(! foldEQ_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2))
-

 #ifdef EBCDIC
 /* The equivalent of these macros but implementing UTF-EBCDIC
    are in the following header file:
 #ifdef EBCDIC
 /* The equivalent of these macros but implementing UTF-EBCDIC
    are in the following header file:


@@ -108,11 +96,19 @@ the string is invariant.
 #else  /* ! EBCDIC */
 START_EXTERN_C
 
 #else  /* ! EBCDIC */
 START_EXTERN_C
 

-/* 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 Unicode's upper limit, 0x10FFFF, can be
- * expressed with 4 bytes.  However, Perl thinks of UTF-8 as a way to encode
- * non-negative integers in a binary format, even those above Unicode */
+/*
+
+=for apidoc AmnU|STRLEN|UTF8_MAXBYTES
+
+The maximum width of a single UTF-8 encoded character, in bytes.
+
+NOTE: Strictly speaking Perl's UTF-8 should not be called UTF-8 since UTF-8
+is an encoding of Unicode, and Unicode's upper limit, 0x10FFFF, can be
+expressed with 4 bytes.  However, Perl thinks of UTF-8 as a way to encode
+non-negative integers in a binary format, even those above Unicode.
+
+=cut
+ */

 #define UTF8_MAXBYTES 13
 
 #ifdef DOINIT
 #define UTF8_MAXBYTES 13
 
 #ifdef DOINIT


@@ -145,20 +141,53 @@ EXTCONST unsigned char PL_utf8skip[];
 
 END_EXTERN_C
 
 
 END_EXTERN_C
 

-#if defined(_MSC_VER) && _MSC_VER < 1400
-/* older MSVC versions have a smallish macro buffer */
-#define PERL_SMALL_MACRO_BUFFER
-#endif
+/*

 
 

-/* Native character to/from iso-8859-1.  Are the identity functions on ASCII
- * platforms */
-#ifdef PERL_SMALL_MACRO_BUFFER
-#define NATIVE_TO_LATIN1(ch)     ((U8)(ch))
-#define LATIN1_TO_NATIVE(ch)     ((U8)(ch))
-#else
-#define NATIVE_TO_LATIN1(ch)     (__ASSERT_(FITS_IN_8_BITS(ch)) ((U8) (ch)))
-#define LATIN1_TO_NATIVE(ch)     (__ASSERT_(FITS_IN_8_BITS(ch)) ((U8) (ch)))
-#endif
+=for apidoc Am|U8|NATIVE_TO_LATIN1|U8 ch
+
+Returns the Latin-1 (including ASCII and control characters) equivalent of the
+input native code point given by C<ch>.  Thus, C<NATIVE_TO_LATIN1(193)> on
+EBCDIC platforms returns 65.  These each represent the character C<"A"> on
+their respective platforms.  On ASCII platforms no conversion is needed, so
+this macro expands to just its input, adding no time nor space requirements to
+the implementation.
+
+For conversion of code points potentially larger than will fit in a character,
+use L</NATIVE_TO_UNI>.
+
+=for apidoc Am|U8|LATIN1_TO_NATIVE|U8 ch
+
+Returns the native  equivalent of the input Latin-1 code point (including ASCII
+and control characters) given by C<ch>.  Thus, C<LATIN1_TO_NATIVE(66)> on
+EBCDIC platforms returns 194.  These each represent the character C<"B"> on
+their respective platforms.  On ASCII platforms no conversion is needed, so
+this macro expands to just its input, adding no time nor space requirements to
+the implementation.
+
+For conversion of code points potentially larger than will fit in a character,
+use L</UNI_TO_NATIVE>.
+
+=for apidoc Am|UV|NATIVE_TO_UNI|UV ch
+
+Returns the Unicode  equivalent of the input native code point given by C<ch>.
+Thus, C<NATIVE_TO_UNI(195)> on EBCDIC platforms returns 67.  These each
+represent the character C<"C"> on their respective platforms.  On ASCII
+platforms no conversion is needed, so this macro expands to just its input,
+adding no time nor space requirements to the implementation.
+
+=for apidoc Am|UV|UNI_TO_NATIVE|UV ch
+
+Returns the native  equivalent of the input Unicode code point  given by C<ch>.
+Thus, C<UNI_TO_NATIVE(68)> on EBCDIC platforms returns 196.  These each
+represent the character C<"D"> on their respective platforms.  On ASCII
+platforms no conversion is needed, so this macro expands to just its input,
+adding no time nor space requirements to the implementation.
+
+=cut
+*/
+
+#define NATIVE_TO_LATIN1(ch)     (__ASSERT_(FITS_IN_8_BITS(ch)) ((U8) ((ch) | 0)))
+#define LATIN1_TO_NATIVE(ch)     (__ASSERT_(FITS_IN_8_BITS(ch)) ((U8) ((ch) | 0)))

 
 /* I8 is an intermediate version of UTF-8 used only in UTF-EBCDIC.  We thus
  * consider it to be identical to UTF-8 on ASCII platforms.  Strictly speaking
 
 /* I8 is an intermediate version of UTF-8 used only in UTF-EBCDIC.  We thus
  * consider it to be identical to UTF-8 on ASCII platforms.  Strictly speaking


@@ -166,17 +195,11 @@ END_EXTERN_C
  * because they are 8-bit encodings that serve the same purpose in Perl, and
  * rarely do we need to distinguish them.  The term "NATIVE_UTF8" applies to
  * whichever one is applicable on the current platform */
  * because they are 8-bit encodings that serve the same purpose in Perl, and
  * rarely do we need to distinguish them.  The term "NATIVE_UTF8" applies to
  * whichever one is applicable on the current platform */

-#ifdef PERL_SMALL_MACRO_BUFFER
-#define NATIVE_UTF8_TO_I8(ch) ((U8) (ch))
-#define I8_TO_NATIVE_UTF8(ch) ((U8) (ch))
-#else
-#define NATIVE_UTF8_TO_I8(ch) (__ASSERT_(FITS_IN_8_BITS(ch)) ((U8) (ch)))
-#define I8_TO_NATIVE_UTF8(ch) (__ASSERT_(FITS_IN_8_BITS(ch)) ((U8) (ch)))
-#endif
+#define NATIVE_UTF8_TO_I8(ch) (__ASSERT_(FITS_IN_8_BITS(ch)) ((U8) ((ch) | 0)))
+#define I8_TO_NATIVE_UTF8(ch) (__ASSERT_(FITS_IN_8_BITS(ch)) ((U8) ((ch) | 0)))

 
 

-/* Transforms in wide UV chars */
-#define UNI_TO_NATIVE(ch)        ((UV) (ch))
-#define NATIVE_TO_UNI(ch)        ((UV) (ch))
+#define UNI_TO_NATIVE(ch)        ((UV) ((ch) | 0))
+#define NATIVE_TO_UNI(ch)        ((UV) ((ch) | 0))

 
 /*
 
 
 /*
 


@@ -231,69 +254,7 @@ Perl's extended UTF-8 means we can have start bytes up through FF, though any
 beginning with FF yields a code point that is too large for 32-bit ASCII
 platforms.  FF signals to use 13 bytes for the encoded character.  This breaks
 the paradigm that the number of leading bits gives how many total bytes there
 beginning with FF yields a code point that is too large for 32-bit ASCII
 platforms.  FF signals to use 13 bytes for the encoded character.  This breaks
 the paradigm that the number of leading bits gives how many total bytes there

-are in the character.
-
-*/
-
-/* Anything larger than this will overflow the word if it were converted into a UV */
-#if defined(UV_IS_QUAD)
-#   define HIGHEST_REPRESENTABLE_UTF8  "\xFF\x80\x8F\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF"
-#else
-#   define HIGHEST_REPRESENTABLE_UTF8  "\xFE\x83\xBF\xBF\xBF\xBF\xBF"
-#endif
-
-/* Is the representation of the Unicode code point 'cp' the same regardless of
- * being encoded in UTF-8 or not? */
-#define OFFUNI_IS_INVARIANT(cp)     isASCII(cp)
-
-/*
-=for apidoc Am|bool|UVCHR_IS_INVARIANT|UV cp
-
-Evaluates to 1 if the representation of code point C<cp> is the same whether or
-not it is encoded in UTF-8; otherwise evaluates to 0.  UTF-8 invariant
-characters can be copied as-is when converting to/from UTF-8, saving time.
-C<cp> is Unicode if above 255; otherwise is platform-native.
-
-=cut
- */
-
-#define UVCHR_IS_INVARIANT(cp)      OFFUNI_IS_INVARIANT(cp)
-
-/* This defines the bits that are to be in the continuation bytes of a multi-byte
- * UTF-8 encoded character that mark it is a continuation byte. */
-#define UTF_CONTINUATION_MARK          0x80
-
-/* Misleadingly named: is the UTF8-encoded byte 'c' part of a variant sequence
- * in UTF-8?  This is the inverse of UTF8_IS_INVARIANT.  The |0 makes sure this
- * isn't mistakenly called with a ptr argument */
-#define UTF8_IS_CONTINUED(c)        (((U8)((c) | 0)) &  UTF_CONTINUATION_MARK)
-
-/* Is the byte 'c' the first byte of a multi-byte UTF8-8 encoded sequence?
- * This doesn't catch invariants (they are single-byte).  It also excludes the
- * illegal overlong sequences that begin with C0 and C1.  The |0 makes sure
- * this isn't mistakenly called with a ptr argument */
-#define UTF8_IS_START(c)            (((U8)((c) | 0)) >= 0xc2)
-
-/* For use in UTF8_IS_CONTINUATION() below */
-#define UTF_IS_CONTINUATION_MASK    0xC0
-
-/* Is the byte 'c' part of a multi-byte UTF8-8 encoded sequence, and not the
- * first byte thereof?  The |0 makes sure this isn't mistakenly called with a
- * ptr argument */
-#define UTF8_IS_CONTINUATION(c)                                             \
-    ((((U8)((c) | 0)) & UTF_IS_CONTINUATION_MASK) == UTF_CONTINUATION_MARK)
-
-/* Is the UTF8-encoded byte 'c' the first byte of a two byte sequence?  Use
- * UTF8_IS_NEXT_CHAR_DOWNGRADEABLE() instead if the input isn't known to
- * be well-formed.  Masking with 0xfe allows the low bit to be 0 or 1; thus
- * this matches 0xc[23].  The |0 makes sure this isn't mistakenly called with a
- * ptr argument */
-#define UTF8_IS_DOWNGRADEABLE_START(c) ((((U8)((c) | 0)) & 0xfe) == 0xc2)
-
-/* Is the UTF8-encoded byte 'c' the first byte of a sequence of bytes that
- * represent a code point > 255?  The |0 makes sure this isn't mistakenly
- * called with a ptr argument */
-#define UTF8_IS_ABOVE_LATIN1(c)     (((U8)((c) | 0)) >= 0xc4)
+are in the character. */

 
 /* This is the number of low-order bits a continuation byte in a UTF-8 encoded
  * sequence contributes to the specification of the code point.  In the bit
 
 /* This is the number of low-order bits a continuation byte in a UTF-8 encoded
  * sequence contributes to the specification of the code point.  In the bit


@@ -307,112 +268,52 @@ C<cp> is Unicode if above 255; otherwise is platform-native.
 
 /* Surrogates, non-character code points and above-Unicode code points are
  * problematic in some contexts.  This allows code that needs to check for
 
 /* Surrogates, non-character code points and above-Unicode code points are
  * problematic in some contexts.  This allows code that needs to check for

- * those to to quickly exclude the vast majority of code points it will
+ * those to quickly exclude the vast majority of code points it will

  * encounter */
  * encounter */

-#define isUTF8_POSSIBLY_PROBLEMATIC(c) ((U8) c >= 0xED)
-
-/* A helper macro for isUTF8_CHAR, so use that one instead of this.  This was
- * generated by regen/regcharclass.pl, and then moved here.  Then it was
- * hand-edited to add some LIKELY() calls, presuming that malformations are
- * unlikely.  The lines that generated it were then commented out.  This was
- * done because it takes on the order of 10 minutes to generate, and is never
- * going to change, unless the generated code is improved, and figuring out
- * the LIKELYs there would be hard.
- *
-        UTF8_CHAR: Matches legal UTF-8 variant code points up through 0x1FFFFFF
+#define isUTF8_POSSIBLY_PROBLEMATIC(c) (__ASSERT_(FITS_IN_8_BITS(c))        \
+                                        (U8) c >= 0xED)

 
 

-       0x80 - 0x1FFFFF
-*/
-/*** GENERATED CODE ***/
-#define is_UTF8_CHAR_utf8_no_length_checks(s)                               \
-( ( 0xC2 <= ((const U8*)s)[0] && ((const U8*)s)[0] <= 0xDF ) ?                          \
-    ( LIKELY( ( ((const U8*)s)[1] & 0xC0 ) == 0x80 ) ? 2 : 0 )                    \
-: ( 0xE0 == ((const U8*)s)[0] ) ?                                                 \
-    ( LIKELY( ( ( ((const U8*)s)[1] & 0xE0 ) == 0xA0 ) && ( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\
-: ( 0xE1 <= ((const U8*)s)[0] && ((const U8*)s)[0] <= 0xEF ) ?                          \
-    ( LIKELY( ( ( ((const U8*)s)[1] & 0xC0 ) == 0x80 ) && ( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\
-: ( 0xF0 == ((const U8*)s)[0] ) ?                                                 \
-    ( LIKELY( ( ( 0x90 <= ((const U8*)s)[1] && ((const U8*)s)[1] <= 0xBF ) && ( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) ) && ( ( ((const U8*)s)[3] & 0xC0 ) == 0x80 ) ) ? 4 : 0 )\
-: ( ( ( ( 0xF1 <= ((const U8*)s)[0] && ((const U8*)s)[0] <= 0xF7 ) && LIKELY( ( ((const U8*)s)[1] & 0xC0 ) == 0x80 ) ) && LIKELY( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) ) && LIKELY( ( ((const U8*)s)[3] & 0xC0 ) == 0x80 ) ) ? 4 : 0 )
-
-/* The above macro handles UTF-8 that has this start byte as the maximum */
-#define _IS_UTF8_CHAR_HIGHEST_START_BYTE 0xF7
-
-/* A helper macro for isSTRICT_UTF8_CHAR, so use that one instead of this.
- * Like is_UTF8_CHAR_utf8_no_length_checks(), this was moved here and LIKELYs
- * added manually.
- *
-       STRICT_UTF8_CHAR: Matches legal Unicode UTF-8 variant code points, no
-                          surrrogates nor non-character code points
-*/
-/*** GENERATED CODE ***/
-#define is_STRICT_UTF8_CHAR_utf8_no_length_checks(s)                        \
-( ( 0xC2 <= ((const U8*)s)[0] && ((const U8*)s)[0] <= 0xDF ) ?                          \
-    ( LIKELY( ( ((const U8*)s)[1] & 0xC0 ) == 0x80 ) ? 2 : 0 )                          \
-: ( 0xE0 == ((const U8*)s)[0] ) ?                                                 \
-    ( LIKELY( ( ( ((const U8*)s)[1] & 0xE0 ) == 0xA0 ) && ( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\
-: ( ( 0xE1 <= ((const U8*)s)[0] && ((const U8*)s)[0] <= 0xEC ) || 0xEE == ((const U8*)s)[0] ) ?\
-    ( ( ( ( ((const U8*)s)[1] & 0xC0 ) == 0x80 ) && ( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\
-: ( 0xED == ((const U8*)s)[0] ) ?                                                 \
-    ( LIKELY( ( ( ((const U8*)s)[1] & 0xE0 ) == 0x80 ) && ( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\
-: ( 0xEF == ((const U8*)s)[0] ) ?                                                 \
-    ( ( ( 0x80 <= ((const U8*)s)[1] && ((const U8*)s)[1] <= 0xB6 ) || ( 0xB8 <= ((const U8*)s)[1] && ((const U8*)s)[1] <= 0xBE ) ) ?\
-       ( LIKELY( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) ? 3 : 0 )                      \
-    : ( 0xB7 == ((const U8*)s)[1] ) ?                                             \
-       ( LIKELY( ( ((const U8*)s)[2] & 0xF0 ) == 0x80 || ( ((const U8*)s)[2] & 0xF0 ) == 0xB0 ) ? 3 : 0 )\
-    : ( ( 0xBF == ((const U8*)s)[1] ) && ( 0x80 <= ((const U8*)s)[2] && ((const U8*)s)[2] <= 0xBD ) ) ? 3 : 0 )\
-: ( 0xF0 == ((const U8*)s)[0] ) ?                                                 \
-    ( ( ( 0x90 <= ((const U8*)s)[1] && ((const U8*)s)[1] <= 0x9E ) || ( 0xA0 <= ((const U8*)s)[1] && ((const U8*)s)[1] <= 0xAE ) || ( 0xB0 <= ((const U8*)s)[1] && ((const U8*)s)[1] <= 0xBE ) ) ?\
-       ( LIKELY( ( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) && ( ( ((const U8*)s)[3] & 0xC0 ) == 0x80 ) ) ? 4 : 0 )\
-    : ( ((const U8*)s)[1] == 0x9F || ( ( ((const U8*)s)[1] & 0xEF ) == 0xAF ) ) ?       \
-       ( ( 0x80 <= ((const U8*)s)[2] && ((const U8*)s)[2] <= 0xBE ) ?                  \
-           ( LIKELY( ( ((const U8*)s)[3] & 0xC0 ) == 0x80 ) ? 4 : 0 )                  \
-       : LIKELY( ( 0xBF == ((const U8*)s)[2] ) && ( 0x80 <= ((const U8*)s)[3] && ((const U8*)s)[3] <= 0xBD ) ) ? 4 : 0 )\
-    : 0 )                                                                   \
-: ( 0xF1 <= ((const U8*)s)[0] && ((const U8*)s)[0] <= 0xF3 ) ?                          \
-    ( ( ( ( ((const U8*)s)[1] & 0xC8 ) == 0x80 ) || ( ( ((const U8*)s)[1] & 0xCC ) == 0x88 ) || ( ( ((const U8*)s)[1] & 0xCE ) == 0x8C ) || ( ( ((const U8*)s)[1] & 0xCF ) == 0x8E ) ) ?\
-       ( LIKELY( ( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) && ( ( ((const U8*)s)[3] & 0xC0 ) == 0x80 ) ) ? 4 : 0 )\
-    : ( ( ((const U8*)s)[1] & 0xCF ) == 0x8F ) ?                                  \
-       ( ( 0x80 <= ((const U8*)s)[2] && ((const U8*)s)[2] <= 0xBE ) ?                  \
-           ( LIKELY( ( ((const U8*)s)[3] & 0xC0 ) == 0x80 ) ? 4 : 0 )                  \
-       : LIKELY( ( 0xBF == ((const U8*)s)[2] ) && ( 0x80 <= ((const U8*)s)[3] && ((const U8*)s)[3] <= 0xBD ) ) ? 4 : 0 )\
-    : 0 )                                                                   \
-: ( 0xF4 == ((const U8*)s)[0] ) ?                                                 \
-    ( ( 0x80 <= ((const U8*)s)[1] && ((const U8*)s)[1] <= 0x8E ) ?                      \
-       ( LIKELY( ( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) && ( ( ((const U8*)s)[3] & 0xC0 ) == 0x80 ) ) ? 4 : 0 )\
-    : ( 0x8F == ((const U8*)s)[1] ) ?                                             \
-       ( ( 0x80 <= ((const U8*)s)[2] && ((const U8*)s)[2] <= 0xBE ) ?                  \
-           ( LIKELY( ( ((const U8*)s)[3] & 0xC0 ) == 0x80 ) ? 4 : 0 )                  \
-       : LIKELY( ( 0xBF == ((const U8*)s)[2] ) && ( 0x80 <= ((const U8*)s)[3] && ((const U8*)s)[3] <= 0xBD ) ) ? 4 : 0 )\
-    : 0 )                                                                   \
-: 0 )
-
-/*  Similarly,
-        C9_STRICT_UTF8_CHAR: Matches legal Unicode UTF-8 variant code
-                                     points, no surrogates
-       0x0080 - 0xD7FF
-       0xE000 - 0x10FFFF
-*/
-/*** GENERATED CODE ***/
-#define is_C9_STRICT_UTF8_CHAR_utf8_no_length_checks(s)                     \
-( ( 0xC2 <= ((const U8*)s)[0] && ((const U8*)s)[0] <= 0xDF ) ?                          \
-    ( LIKELY( ( ((const U8*)s)[1] & 0xC0 ) == 0x80 ) ? 2 : 0 )                    \
-: ( 0xE0 == ((const U8*)s)[0] ) ?                                                 \
-    ( LIKELY( ( ( ((const U8*)s)[1] & 0xE0 ) == 0xA0 ) && ( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\
-: ( ( 0xE1 <= ((const U8*)s)[0] && ((const U8*)s)[0] <= 0xEC ) || ( ((const U8*)s)[0] & 0xFE ) == 0xEE ) ?\
-    ( LIKELY( ( ( ((const U8*)s)[1] & 0xC0 ) == 0x80 ) && ( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\
-: ( 0xED == ((const U8*)s)[0] ) ?                                                 \
-    ( LIKELY( ( ( ((const U8*)s)[1] & 0xE0 ) == 0x80 ) && ( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\
-: ( 0xF0 == ((const U8*)s)[0] ) ?                                                 \
-    ( LIKELY( ( ( 0x90 <= ((const U8*)s)[1] && ((const U8*)s)[1] <= 0xBF ) && ( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) ) && ( ( ((const U8*)s)[3] & 0xC0 ) == 0x80 ) ) ? 4 : 0 )\
-: ( 0xF1 <= ((const U8*)s)[0] && ((const U8*)s)[0] <= 0xF3 ) ?                          \
-    ( LIKELY( ( ( ( ((const U8*)s)[1] & 0xC0 ) == 0x80 ) && ( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) ) && ( ( ((const U8*)s)[3] & 0xC0 ) == 0x80 ) ) ? 4 : 0 )\
-: LIKELY( ( ( ( 0xF4 == ((const U8*)s)[0] ) && ( ( ((const U8*)s)[1] & 0xF0 ) == 0x80 ) ) && ( ( ((const U8*)s)[2] & 0xC0 ) == 0x80 ) ) && ( ( ((const U8*)s)[3] & 0xC0 ) == 0x80 ) ) ? 4 : 0 )
+#define UNICODE_IS_PERL_EXTENDED(uv)    UNLIKELY((UV) (uv) > 0x7FFFFFFF)

 
 #endif /* EBCDIC vs ASCII */
 
 
 #endif /* EBCDIC vs ASCII */
 

-/* 2**UTF_ACCUMULATION_SHIFT - 1 */
-#define UTF_CONTINUATION_MASK  ((U8) ((1U << UTF_ACCUMULATION_SHIFT) - 1))
+/* 2**UTF_ACCUMULATION_SHIFT - 1.  This masks out all but the bits that carry
+ * real information in a continuation byte.  This turns out to be 0x3F in
+ * UTF-8, 0x1F in UTF-EBCDIC. */
+#define UTF_CONTINUATION_MASK  ((U8) (nBIT_MASK(UTF_ACCUMULATION_SHIFT)))
+
+/* For use in UTF8_IS_CONTINUATION().  This turns out to be 0xC0 in UTF-8,
+ * E0 in UTF-EBCDIC */
+#define UTF_IS_CONTINUATION_MASK    ((U8) (0xFF << UTF_ACCUMULATION_SHIFT))
+
+/* This defines the bits that are to be in the continuation bytes of a
+ * multi-byte UTF-8 encoded character that mark it is a continuation byte.
+ * This turns out to be 0x80 in UTF-8, 0xA0 in UTF-EBCDIC.  (khw doesn't know
+ * the underlying reason that B0 works here) */
+#define UTF_CONTINUATION_MARK       (UTF_IS_CONTINUATION_MASK & 0xB0)
+
+/* Is the byte 'c' part of a multi-byte UTF8-8 encoded sequence, and not the
+ * first byte thereof? */
+#define UTF8_IS_CONTINUATION(c)     (__ASSERT_(FITS_IN_8_BITS(c))           \
+            (((NATIVE_UTF8_TO_I8(c) & UTF_IS_CONTINUATION_MASK)             \
+                                                == UTF_CONTINUATION_MARK)))
+
+/* Is the representation of the Unicode code point 'cp' the same regardless of
+ * being encoded in UTF-8 or not? This is a fundamental property of
+ * UTF-8,EBCDIC */
+#define OFFUNI_IS_INVARIANT(c) (((WIDEST_UTYPE)(c)) < UTF_CONTINUATION_MARK)
+
+/*
+=for apidoc Am|bool|UVCHR_IS_INVARIANT|UV cp
+
+Evaluates to 1 if the representation of code point C<cp> is the same whether or
+not it is encoded in UTF-8; otherwise evaluates to 0.  UTF-8 invariant
+characters can be copied as-is when converting to/from UTF-8, saving time.
+C<cp> is Unicode if above 255; otherwise is platform-native.
+
+=cut
+ */
+#define UVCHR_IS_INVARIANT(cp)  (OFFUNI_IS_INVARIANT(NATIVE_TO_UNI(cp)))

 
 /* Internal macro to be used only in this file to aid in constructing other
  * publicly accessible macros.
 
 /* Internal macro to be used only in this file to aid in constructing other
  * publicly accessible macros.


@@ -449,7 +350,9 @@ C<cp> is Unicode if above 255; otherwise is platform-native.
  * ASCII platforms, everything is representable by 7 bytes */
 #if defined(UV_IS_QUAD) || defined(EBCDIC)
 #   define __BASE_UNI_SKIP(uv) (__COMMON_UNI_SKIP(uv)                       \
  * ASCII platforms, everything is representable by 7 bytes */
 #if defined(UV_IS_QUAD) || defined(EBCDIC)
 #   define __BASE_UNI_SKIP(uv) (__COMMON_UNI_SKIP(uv)                       \

-     (UV) (uv) < ((UV) 1U << (6 * UTF_ACCUMULATION_SHIFT)) ? 7 : UTF8_MAXBYTES)
+     LIKELY((UV) (uv) < ((UV) 1U << (6 * UTF_ACCUMULATION_SHIFT)))          \
+     ? 7                                                                    \
+     : UTF8_MAXBYTES)

 #else
 #   define __BASE_UNI_SKIP(uv) (__COMMON_UNI_SKIP(uv) 7)
 #endif
 #else
 #   define __BASE_UNI_SKIP(uv) (__COMMON_UNI_SKIP(uv) 7)
 #endif


@@ -472,6 +375,39 @@ encoded as UTF-8.  C<cp> is a native (ASCII or EBCDIC) code point if less than
  */
 #define UVCHR_SKIP(uv) ( UVCHR_IS_INVARIANT(uv) ? 1 : __BASE_UNI_SKIP(uv))
 
  */
 #define UVCHR_SKIP(uv) ( UVCHR_IS_INVARIANT(uv) ? 1 : __BASE_UNI_SKIP(uv))
 

+#define UTF_MIN_START_BYTE                                                  \
+     ((UTF_CONTINUATION_MARK >> UTF_ACCUMULATION_SHIFT) | UTF_START_MARK(2))
+
+/* Is the byte 'c' the first byte of a multi-byte UTF8-8 encoded sequence?
+ * This excludes invariants (they are single-byte).  It also excludes the
+ * illegal overlong sequences that begin with C0 and C1 on ASCII platforms, and
+ * C0-C4 I8 start bytes on EBCDIC ones.  On EBCDIC E0 can't start a
+ * non-overlong sequence, so we define a base macro and for those platforms,
+ * extend it to also exclude E0 */
+#define UTF8_IS_START_base(c)    (__ASSERT_(FITS_IN_8_BITS(c))              \
+                             (NATIVE_UTF8_TO_I8(c) >= UTF_MIN_START_BYTE))
+#ifdef EBCDIC
+#  define UTF8_IS_START(c)                                                  \
+                (UTF8_IS_START_base(c) && (c) != I8_TO_NATIVE_UTF8(0xE0))
+#else
+#  define UTF8_IS_START(c)  UTF8_IS_START_base(c)
+#endif
+
+#define UTF_MIN_ABOVE_LATIN1_BYTE                                           \
+                    ((0x100 >> UTF_ACCUMULATION_SHIFT) | UTF_START_MARK(2))
+
+/* Is the UTF8-encoded byte 'c' the first byte of a sequence of bytes that
+ * represent a code point > 255? */
+#define UTF8_IS_ABOVE_LATIN1(c)     (__ASSERT_(FITS_IN_8_BITS(c))           \
+                        (NATIVE_UTF8_TO_I8(c) >= UTF_MIN_ABOVE_LATIN1_BYTE))
+
+/* Is the UTF8-encoded byte 'c' the first byte of a two byte sequence?  Use
+ * UTF8_IS_NEXT_CHAR_DOWNGRADEABLE() instead if the input isn't known to
+ * be well-formed. */
+#define UTF8_IS_DOWNGRADEABLE_START(c) (__ASSERT_(FITS_IN_8_BITS(c))       \
+                inRANGE(NATIVE_UTF8_TO_I8(c),                               \
+                        UTF_MIN_START_BYTE, UTF_MIN_ABOVE_LATIN1_BYTE - 1))
+

 /* The largest code point representable by two UTF-8 bytes on this platform.
  * As explained in the comments for __COMMON_UNI_SKIP, 32 start bytes with
  * UTF_ACCUMULATION_SHIFT bits of information each */
 /* The largest code point representable by two UTF-8 bytes on this platform.
  * As explained in the comments for __COMMON_UNI_SKIP, 32 start bytes with
  * UTF_ACCUMULATION_SHIFT bits of information each */


@@ -480,20 +416,28 @@ encoded as UTF-8.  C<cp> is a native (ASCII or EBCDIC) code point if less than
 /* The largest code point representable by two UTF-8 bytes on any platform that
  * Perl runs on.  This value is constrained by EBCDIC which has 5 bits per
  * continuation byte */
 /* The largest code point representable by two UTF-8 bytes on any platform that
  * Perl runs on.  This value is constrained by EBCDIC which has 5 bits per
  * continuation byte */

-#define MAX_PORTABLE_UTF8_TWO_BYTE (32 * (1U << 5) - 1)
-
-/* The maximum number of UTF-8 bytes a single Unicode character can
- * uppercase/lowercase/fold into.  Unicode guarantees that the maximum
- * expansion is UTF8_MAX_FOLD_CHAR_EXPAND characters, but any above-Unicode
- * code point will fold to itself, so we only have to look at the expansion of
- * the maximum Unicode code point.  But this number may be less than the space
- * occupied by a very large code point under Perl's extended UTF-8.  We have to
- * make it large enough to fit any single character.  (It turns out that ASCII
- * and EBCDIC differ in which is larger) */
+#define MAX_PORTABLE_UTF8_TWO_BYTE (32 * nBIT_UMAX(5))
+
+/*
+
+=for apidoc AmnU|STRLEN|UTF8_MAXBYTES_CASE
+
+The maximum number of UTF-8 bytes a single Unicode character can
+uppercase/lowercase/titlecase/fold into.
+
+=cut
+
+ * Unicode guarantees that the maximum expansion is UTF8_MAX_FOLD_CHAR_EXPAND
+ * characters, but any above-Unicode code point will fold to itself, so we only
+ * have to look at the expansion of the maximum Unicode code point.  But this
+ * number may be less than the space occupied by a very large code point under
+ * Perl's extended UTF-8.  We have to make it large enough to fit any single
+ * character.  (It turns out that ASCII and EBCDIC differ in which is larger)
+ *
+=cut
+*/

 #define UTF8_MAXBYTES_CASE                                                     \
 #define UTF8_MAXBYTES_CASE                                                     \

-        (UTF8_MAXBYTES >= (UTF8_MAX_FOLD_CHAR_EXPAND * OFFUNISKIP(0x10FFFF))    \
-                           ? UTF8_MAXBYTES                                      \
-                           : (UTF8_MAX_FOLD_CHAR_EXPAND * OFFUNISKIP(0x10FFFF)))
+            MAX(UTF8_MAXBYTES, UTF8_MAX_FOLD_CHAR_EXPAND * OFFUNISKIP(0x10FFFF))

 
 /* Rest of these are attributes of Unicode and perl's internals rather than the
  * encoding, or happen to be the same in both ASCII and EBCDIC (at least at
 
 /* Rest of these are attributes of Unicode and perl's internals rather than the
  * encoding, or happen to be the same in both ASCII and EBCDIC (at least at


@@ -516,12 +460,14 @@ encoded as UTF-8.  C<cp> is a native (ASCII or EBCDIC) code point if less than
  * UTF-8 encoded character that mark it as a start byte and give the number of
  * bytes that comprise the character. 'len' is the number of bytes in the
  * multi-byte sequence. */
  * UTF-8 encoded character that mark it as a start byte and give the number of
  * bytes that comprise the character. 'len' is the number of bytes in the
  * multi-byte sequence. */

-#define UTF_START_MARK(len) (((len) >  7) ? 0xFF : (0xFF & (0xFE << (7-(len)))))
+#define UTF_START_MARK(len) (UNLIKELY((len) >  7)           \
+                            ? 0xFF                          \
+                            : ((U8) (0xFE << (7-(len)))))

 
 /* Masks out the initial one bits in a start byte, leaving the real data ones.
  * Doesn't work on an invariant byte.  'len' is the number of bytes in the
  * multi-byte sequence that comprises the character. */
 
 /* Masks out the initial one bits in a start byte, leaving the real data ones.
  * Doesn't work on an invariant byte.  'len' is the number of bytes in the
  * multi-byte sequence that comprises the character. */

-#define UTF_START_MASK(len) (((len) >= 7) ? 0x00 : (0x1F >> ((len)-2)))
+#define UTF_START_MASK(len) (UNLIKELY((len) >= 7) ? 0x00 : (0x1F >> ((len)-2)))

 
 /* Adds a UTF8 continuation byte 'new' of information to a running total code
  * point 'old' of all the continuation bytes so far.  This is designed to be
 
 /* Adds a UTF8 continuation byte 'new' of information to a running total code
  * point 'old' of all the continuation bytes so far.  This is designed to be


@@ -529,14 +475,16 @@ encoded as UTF-8.  C<cp> is a native (ASCII or EBCDIC) code point if less than
  * that this is asymmetric on EBCDIC platforms, in that the 'new' parameter is
  * the UTF-EBCDIC byte, whereas the 'old' parameter is a Unicode (not EBCDIC)
  * code point in process of being generated */
  * that this is asymmetric on EBCDIC platforms, in that the 'new' parameter is
  * the UTF-EBCDIC byte, whereas the 'old' parameter is a Unicode (not EBCDIC)
  * code point in process of being generated */

-#define UTF8_ACCUMULATE(old, new) (((old) << UTF_ACCUMULATION_SHIFT)           \
-                                   | ((NATIVE_UTF8_TO_I8((U8)new))             \
+#define UTF8_ACCUMULATE(old, new) (__ASSERT_(FITS_IN_8_BITS(new))              \
+                                   ((old) << UTF_ACCUMULATION_SHIFT)           \
+                                   | ((NATIVE_UTF8_TO_I8(new))                 \

                                        & UTF_CONTINUATION_MASK))
 
 /* This works in the face of malformed UTF-8. */
                                        & UTF_CONTINUATION_MASK))
 
 /* This works in the face of malformed UTF-8. */

-#define UTF8_IS_NEXT_CHAR_DOWNGRADEABLE(s, e) (UTF8_IS_DOWNGRADEABLE_START(*s) \
-                                               && ( (e) - (s) > 1)             \
-                                               && UTF8_IS_CONTINUATION(*((s)+1)))
+#define UTF8_IS_NEXT_CHAR_DOWNGRADEABLE(s, e)                                 \
+                                       (   UTF8_IS_DOWNGRADEABLE_START(*(s))  \
+                                        && ( (e) - (s) > 1)                   \
+                                        && UTF8_IS_CONTINUATION(*((s)+1)))

 
 /* Number of bytes a code point occupies in UTF-8. */
 #define NATIVE_SKIP(uv) UVCHR_SKIP(uv)
 
 /* Number of bytes a code point occupies in UTF-8. */
 #define NATIVE_SKIP(uv) UVCHR_SKIP(uv)


@@ -571,8 +519,10 @@ encoded as UTF-8.  C<cp> is a native (ASCII or EBCDIC) code point if less than
  * Note that the result can be larger than 255 if the input character is not
  * downgradable */
 #define TWO_BYTE_UTF8_TO_NATIVE(HI, LO) \
  * Note that the result can be larger than 255 if the input character is not
  * downgradable */
 #define TWO_BYTE_UTF8_TO_NATIVE(HI, LO) \

-    ( __ASSERT_(PL_utf8skip[HI] == 2)                                           \
-      __ASSERT_(UTF8_IS_CONTINUATION(LO))                                       \
+    (__ASSERT_(FITS_IN_8_BITS(HI))                                              \
+     __ASSERT_(FITS_IN_8_BITS(LO))                                              \
+     __ASSERT_(PL_utf8skip[HI] == 2)                                            \
+     __ASSERT_(UTF8_IS_CONTINUATION(LO))                                        \

      UNI_TO_NATIVE(UTF8_ACCUMULATE((NATIVE_UTF8_TO_I8(HI) & UTF_START_MASK(2)), \
                                    (LO))))
 
      UNI_TO_NATIVE(UTF8_ACCUMULATE((NATIVE_UTF8_TO_I8(HI) & UTF_START_MASK(2)), \
                                    (LO))))
 


@@ -582,14 +532,75 @@ encoded as UTF-8.  C<cp> is a native (ASCII or EBCDIC) code point if less than
 /*
 
 =for apidoc Am|STRLEN|UTF8SKIP|char* s
 /*
 
 =for apidoc Am|STRLEN|UTF8SKIP|char* s

-returns the number of bytes in the UTF-8 encoded character whose first (perhaps
-only) byte is pointed to by C<s>.
+returns the number of bytes a non-malformed UTF-8 encoded character whose first
+(perhaps only) byte is pointed to by C<s>.
+
+If there is a possibility of malformed input, use instead:
+
+=over
+
+=item L</C<UTF8_SAFE_SKIP>> if you know the maximum ending pointer in the
+buffer pointed to by C<s>; or
+
+=item L</C<UTF8_CHK_SKIP>> if you don't know it.
+
+=back
+
+It is better to restructure your code so the end pointer is passed down so that
+you know what it actually is at the point of this call, but if that isn't
+possible, L</C<UTF8_CHK_SKIP>> can minimize the chance of accessing beyond the end
+of the input buffer.

 
 =cut
  */
 #define UTF8SKIP(s)  PL_utf8skip[*(const U8*)(s)]
 
 =cut
  */
 #define UTF8SKIP(s)  PL_utf8skip[*(const U8*)(s)]

+
+/*
+=for apidoc Am|STRLEN|UTF8_SKIP|char* s
+This is a synonym for L</C<UTF8SKIP>>
+
+=cut
+*/
+

 #define UTF8_SKIP(s) UTF8SKIP(s)
 
 #define UTF8_SKIP(s) UTF8SKIP(s)
 

+/*
+=for apidoc Am|STRLEN|UTF8_CHK_SKIP|char* s
+
+This is a safer version of L</C<UTF8SKIP>>, but still not as safe as
+L</C<UTF8_SAFE_SKIP>>.  This version doesn't blindly assume that the input
+string pointed to by C<s> is well-formed, but verifies that there isn't a NUL
+terminating character before the expected end of the next character in C<s>.
+The length C<UTF8_CHK_SKIP> returns stops just before any such NUL.
+
+Perl tends to add NULs, as an insurance policy, after the end of strings in
+SV's, so it is likely that using this macro will prevent inadvertent reading
+beyond the end of the input buffer, even if it is malformed UTF-8.
+
+This macro is intended to be used by XS modules where the inputs could be
+malformed, and it isn't feasible to restructure to use the safer
+L</C<UTF8_SAFE_SKIP>>, for example when interfacing with a C library.
+
+=cut
+*/
+
+#define UTF8_CHK_SKIP(s)                                                       \
+            (UNLIKELY(s[0] == '\0') ? 1 : MIN(UTF8SKIP(s),                     \
+                                    my_strnlen((char *) (s), UTF8SKIP(s))))
+/*
+
+=for apidoc Am|STRLEN|UTF8_SAFE_SKIP|char* s|char* e
+returns 0 if S<C<s E<gt>= e>>; otherwise returns the number of bytes in the
+UTF-8 encoded character whose first  byte is pointed to by C<s>.  But it never
+returns beyond C<e>.  On DEBUGGING builds, it asserts that S<C<s E<lt>= e>>.
+
+=cut
+ */
+#define UTF8_SAFE_SKIP(s, e)  (__ASSERT_((e) >= (s))                \
+                              UNLIKELY(((e) - (s)) <= 0)            \
+                               ? 0                                  \
+                               : MIN(((e) - (s)), UTF8_SKIP(s)))
+

 /* Most code that says 'UNI_' really means the native value for code points up
  * through 255 */
 #define UNI_IS_INVARIANT(cp)   UVCHR_IS_INVARIANT(cp)
 /* Most code that says 'UNI_' really means the native value for code points up
  * through 255 */
 #define UNI_IS_INVARIANT(cp)   UVCHR_IS_INVARIANT(cp)


@@ -621,6 +632,11 @@ with a ptr argument.
  * above show, doesn't matter as to its implementation */
 #define NATIVE_BYTE_IS_INVARIANT(c)    UVCHR_IS_INVARIANT(c)
 
  * above show, doesn't matter as to its implementation */
 #define NATIVE_BYTE_IS_INVARIANT(c)    UVCHR_IS_INVARIANT(c)
 

+/* Misleadingly named: is the UTF8-encoded byte 'c' part of a variant sequence
+ * in UTF-8?  This is the inverse of UTF8_IS_INVARIANT. */
+#define UTF8_IS_CONTINUED(c)  (__ASSERT_(FITS_IN_8_BITS(c))                 \
+                               (! UTF8_IS_INVARIANT(c)))
+

 /* The macros in the next 4 sets are used to generate the two utf8 or utfebcdic
  * bytes from an ordinal that is known to fit into exactly two (not one) bytes;
  * it must be less than 0x3FF to work across both encodings. */
 /* The macros in the next 4 sets are used to generate the two utf8 or utfebcdic
  * bytes from an ordinal that is known to fit into exactly two (not one) bytes;
  * it must be less than 0x3FF to work across both encodings. */


@@ -677,37 +693,22 @@ with a ptr argument.
  * beginning of a utf8 character.  Now that foo_utf8() determines that itself,
  * no need to do it again here
  */
  * beginning of a utf8 character.  Now that foo_utf8() determines that itself,
  * no need to do it again here
  */

-#define isIDFIRST_lazy_if(p,UTF)                                            \
-            _is_utf8_FOO(_CC_IDFIRST, (const U8 *) p, "isIDFIRST_lazy_if",  \
-                         "isIDFIRST_lazy_if_safe",                          \
-                         cBOOL(UTF && ! IN_BYTES), 0, __FILE__,__LINE__)
-

 #define isIDFIRST_lazy_if_safe(p, e, UTF)                                   \
                    ((IN_BYTES || !UTF)                                      \
                      ? isIDFIRST(*(p))                                      \
                      : isIDFIRST_utf8_safe(p, e))
 #define isIDFIRST_lazy_if_safe(p, e, UTF)                                   \
                    ((IN_BYTES || !UTF)                                      \
                      ? isIDFIRST(*(p))                                      \
                      : isIDFIRST_utf8_safe(p, e))

-
-#define isWORDCHAR_lazy_if(p,UTF)                                           \
-            _is_utf8_FOO(_CC_IDFIRST, (const U8 *) p, "isWORDCHAR_lazy_if", \
-                         "isWORDCHAR_lazy_if_safe",                         \
-                         cBOOL(UTF && ! IN_BYTES), 0, __FILE__,__LINE__)
-

 #define isWORDCHAR_lazy_if_safe(p, e, UTF)                                  \
                    ((IN_BYTES || !UTF)                                      \
                      ? isWORDCHAR(*(p))                                     \
                      : isWORDCHAR_utf8_safe((U8 *) p, (U8 *) e))
 #define isWORDCHAR_lazy_if_safe(p, e, UTF)                                  \
                    ((IN_BYTES || !UTF)                                      \
                      ? isWORDCHAR(*(p))                                     \
                      : isWORDCHAR_utf8_safe((U8 *) p, (U8 *) e))

-
-#define isALNUM_lazy_if(p,UTF)                                              \
-            _is_utf8_FOO(_CC_IDFIRST, (const U8 *) p, "isALNUM_lazy_if",    \
-                         "isWORDCHAR_lazy_if_safe",                         \
-                         cBOOL(UTF && ! IN_BYTES), 0, __FILE__,__LINE__)
+#define isALNUM_lazy_if_safe(p, e, UTF) isWORDCHAR_lazy_if_safe(p, e, UTF)

 
 #define UTF8_MAXLEN UTF8_MAXBYTES
 
 /* A Unicode character can fold to up to 3 characters */
 #define UTF8_MAX_FOLD_CHAR_EXPAND 3
 
 
 #define UTF8_MAXLEN UTF8_MAXBYTES
 
 /* A Unicode character can fold to up to 3 characters */
 #define UTF8_MAX_FOLD_CHAR_EXPAND 3
 

-#define IN_BYTES (CopHINTS_get(PL_curcop) & HINT_BYTES)
+#define IN_BYTES UNLIKELY(CopHINTS_get(PL_curcop) & HINT_BYTES)

 
 /*
 
 
 /*
 


@@ -726,12 +727,12 @@ case any call to string overloading updates the internal UTF-8 encoding flag.
  * Is so within 'feature unicode_strings' or 'locale :not_characters', and not
  * within 'use bytes'.  UTF-8 locales are not tested for here, but perhaps
  * could be */
  * Is so within 'feature unicode_strings' or 'locale :not_characters', and not
  * within 'use bytes'.  UTF-8 locales are not tested for here, but perhaps
  * could be */

-#define IN_UNI_8_BIT                                                             \
-           (((CopHINTS_get(PL_curcop) & (HINT_UNI_8_BIT))                       \
-               || (CopHINTS_get(PL_curcop) & HINT_LOCALE_PARTIAL                 \
-                   /* -1 below is for :not_characters */                         \
-                   && _is_in_locale_category(FALSE, -1)))                        \
-              && ! IN_BYTES)
+#define IN_UNI_8_BIT                                                    \
+           ((    (      (CopHINTS_get(PL_curcop) & HINT_UNI_8_BIT))    \
+                   || (   CopHINTS_get(PL_curcop) & HINT_LOCALE_PARTIAL \
+                            /* -1 below is for :not_characters */       \
+                       && _is_in_locale_category(FALSE, -1)))           \
+              && (! IN_BYTES))

 
 
 #define UTF8_ALLOW_EMPTY               0x0001  /* Allow a zero length string */
 
 
 #define UTF8_ALLOW_EMPTY               0x0001  /* Allow a zero length string */


@@ -741,7 +742,7 @@ case any call to string overloading updates the internal UTF-8 encoding flag.
 #define UTF8_ALLOW_CONTINUATION                0x0002
 #define UTF8_GOT_CONTINUATION          UTF8_ALLOW_CONTINUATION
 
 #define UTF8_ALLOW_CONTINUATION                0x0002
 #define UTF8_GOT_CONTINUATION          UTF8_ALLOW_CONTINUATION
 

-/* Unexpected continuation byte */
+/* Unexpected non-continuation byte */

 #define UTF8_ALLOW_NON_CONTINUATION    0x0004
 #define UTF8_GOT_NON_CONTINUATION      UTF8_ALLOW_NON_CONTINUATION
 
 #define UTF8_ALLOW_NON_CONTINUATION    0x0004
 #define UTF8_GOT_NON_CONTINUATION      UTF8_ALLOW_NON_CONTINUATION
 


@@ -763,25 +764,36 @@ case any call to string overloading updates the internal UTF-8 encoding flag.
 #define UTF8_GOT_SURROGATE             UTF8_DISALLOW_SURROGATE
 #define UTF8_WARN_SURROGATE            0x0200
 
 #define UTF8_GOT_SURROGATE             UTF8_DISALLOW_SURROGATE
 #define UTF8_WARN_SURROGATE            0x0200
 

-#define UTF8_DISALLOW_NONCHAR           0x0400 /* Unicode non-character */
+/* Unicode non-character  code points */
+#define UTF8_DISALLOW_NONCHAR           0x0400

 #define UTF8_GOT_NONCHAR                UTF8_DISALLOW_NONCHAR
 #define UTF8_GOT_NONCHAR                UTF8_DISALLOW_NONCHAR

-#define UTF8_WARN_NONCHAR               0x0800 /*  code points */
+#define UTF8_WARN_NONCHAR               0x0800

 
 

-#define UTF8_DISALLOW_SUPER            0x1000  /* Super-set of Unicode: code */
+/* Super-set of Unicode: code points above the legal max */
+#define UTF8_DISALLOW_SUPER            0x1000

 #define UTF8_GOT_SUPER                 UTF8_DISALLOW_SUPER
 #define UTF8_GOT_SUPER                 UTF8_DISALLOW_SUPER

-#define UTF8_WARN_SUPER                        0x2000  /* points above the legal max */
-
-/* Code points which never were part of the original UTF-8 standard, which only
- * went up to 2 ** 31 - 1.  Note that these all overflow a signed 32-bit word,
- * The first byte of these code points is FE or FF on ASCII platforms.  If the
- * first byte is FF, it will overflow a 32-bit word. */
-#define UTF8_DISALLOW_ABOVE_31_BIT      0x4000
-#define UTF8_GOT_ABOVE_31_BIT           UTF8_DISALLOW_ABOVE_31_BIT
-#define UTF8_WARN_ABOVE_31_BIT          0x8000
-
-/* For back compat, these old names are misleading for UTF_EBCDIC */
-#define UTF8_DISALLOW_FE_FF             UTF8_DISALLOW_ABOVE_31_BIT
-#define UTF8_WARN_FE_FF                 UTF8_WARN_ABOVE_31_BIT
+#define UTF8_WARN_SUPER                        0x2000
+
+/* The original UTF-8 standard did not define UTF-8 with start bytes of 0xFE or
+ * 0xFF, though UTF-EBCDIC did.  This allowed both versions to represent code
+ * points up to 2 ** 31 - 1.  Perl extends UTF-8 so that 0xFE and 0xFF are
+ * usable on ASCII platforms, and 0xFF means something different than
+ * UTF-EBCDIC defines.  These changes allow code points of 64 bits (actually
+ * somewhat more) to be represented on both platforms.  But these are Perl
+ * extensions, and not likely to be interchangeable with other languages.  Note
+ * that on ASCII platforms, FE overflows a signed 32-bit word, and FF an
+ * unsigned one. */
+#define UTF8_DISALLOW_PERL_EXTENDED     0x4000
+#define UTF8_GOT_PERL_EXTENDED          UTF8_DISALLOW_PERL_EXTENDED
+#define UTF8_WARN_PERL_EXTENDED         0x8000
+
+/* For back compat, these old names are misleading for overlongs and
+ * UTF_EBCDIC. */
+#define UTF8_DISALLOW_ABOVE_31_BIT      UTF8_DISALLOW_PERL_EXTENDED
+#define UTF8_GOT_ABOVE_31_BIT           UTF8_GOT_PERL_EXTENDED
+#define UTF8_WARN_ABOVE_31_BIT          UTF8_WARN_PERL_EXTENDED
+#define UTF8_DISALLOW_FE_FF             UTF8_DISALLOW_PERL_EXTENDED
+#define UTF8_WARN_FE_FF                 UTF8_WARN_PERL_EXTENDED

 
 #define UTF8_CHECK_ONLY                        0x10000
 #define _UTF8_NO_CONFIDENCE_IN_CURLEN   0x20000  /* Internal core use only */
 
 #define UTF8_CHECK_ONLY                        0x10000
 #define _UTF8_NO_CONFIDENCE_IN_CURLEN   0x20000  /* Internal core use only */


@@ -790,6 +802,7 @@ case any call to string overloading updates the internal UTF-8 encoding flag.
  * includes what they used to mean.  The first one's meaning was to allow the
  * just the single non-character 0xFFFF */
 #define UTF8_ALLOW_FFFF 0
  * includes what they used to mean.  The first one's meaning was to allow the
  * just the single non-character 0xFFFF */
 #define UTF8_ALLOW_FFFF 0

+#define UTF8_ALLOW_FE_FF 0

 #define UTF8_ALLOW_SURROGATE 0
 
 /* C9 refers to Unicode Corrigendum #9: allows but discourages non-chars */
 #define UTF8_ALLOW_SURROGATE 0
 
 /* C9 refers to Unicode Corrigendum #9: allows but discourages non-chars */


@@ -802,10 +815,10 @@ case any call to string overloading updates the internal UTF-8 encoding flag.
 #define UTF8_WARN_ILLEGAL_INTERCHANGE \
                           (UTF8_WARN_ILLEGAL_C9_INTERCHANGE|UTF8_WARN_NONCHAR)
 
 #define UTF8_WARN_ILLEGAL_INTERCHANGE \
                           (UTF8_WARN_ILLEGAL_C9_INTERCHANGE|UTF8_WARN_NONCHAR)
 

-/* This is used typically for code that is willing to accept inputs of
- * illformed UTF-8 sequences, for whatever reason.  However, all such sequences
- * evaluate to the REPLACEMENT CHARACTER unless other flags overriding this are
- * also present. */
+/* This is typically used for code that processes UTF-8 input and doesn't want
+ * to have to deal with any malformations that might be present.  All such will
+ * be safely replaced by the REPLACEMENT CHARACTER, unless other flags
+ * overriding this are also present. */

 #define UTF8_ALLOW_ANY ( UTF8_ALLOW_CONTINUATION                                \
                         |UTF8_ALLOW_NON_CONTINUATION                            \
                         |UTF8_ALLOW_SHORT                                       \
 #define UTF8_ALLOW_ANY ( UTF8_ALLOW_CONTINUATION                                \
                         |UTF8_ALLOW_NON_CONTINUATION                            \
                         |UTF8_ALLOW_SHORT                                       \


@@ -813,8 +826,7 @@ case any call to string overloading updates the internal UTF-8 encoding flag.
                         |UTF8_ALLOW_OVERFLOW)
 
 /* Accept any Perl-extended UTF-8 that evaluates to any UV on the platform, but
                         |UTF8_ALLOW_OVERFLOW)
 
 /* Accept any Perl-extended UTF-8 that evaluates to any UV on the platform, but

- * not any malformed.  This is the default.  (Note that UVs above IV_MAX are
- * deprecated. */
+ * not any malformed.  This is the default. */

 #define UTF8_ALLOW_ANYUV   0
 #define UTF8_ALLOW_DEFAULT UTF8_ALLOW_ANYUV
 
 #define UTF8_ALLOW_ANYUV   0
 #define UTF8_ALLOW_DEFAULT UTF8_ALLOW_ANYUV
 


@@ -834,6 +846,8 @@ point's representation.
 
 #define UTF8_IS_REPLACEMENT(s, send) is_REPLACEMENT_utf8_safe(s,send)
 
 
 #define UTF8_IS_REPLACEMENT(s, send) is_REPLACEMENT_utf8_safe(s,send)
 

+#define MAX_LEGAL_CP  ((UV)IV_MAX)
+

 /*
 =for apidoc Am|bool|UTF8_IS_SUPER|const U8 *s|const U8 *e
 
 /*
 =for apidoc Am|bool|UTF8_IS_SUPER|const U8 *s|const U8 *e
 


@@ -850,7 +864,7 @@ represent a code point that cannot fit in a UV on the current platform.  Hence
 this macro can give different results when run on a 64-bit word machine than on
 one with a 32-bit word size.
 
 this macro can give different results when run on a 64-bit word machine than on
 one with a 32-bit word size.
 

-Note that it is deprecated to have code points that are larger than what can
+Note that it is illegal to have code points that are larger than what can

 fit in an IV on the current machine.
 
 =cut
 fit in an IV on the current machine.
 
 =cut


@@ -862,19 +876,20 @@ fit in an IV on the current machine.
  */
 #ifdef EBCDIC
 #   define UTF8_IS_SUPER(s, e)                                              \
  */
 #ifdef EBCDIC
 #   define UTF8_IS_SUPER(s, e)                                              \

-                  ((    LIKELY((e) > (s) + 4)                               \
-                    &&      NATIVE_UTF8_TO_I8(*(s)) >= 0xF9                 \
-                    && (    NATIVE_UTF8_TO_I8(*(s)) >  0xF9                 \
-                        || (NATIVE_UTF8_TO_I8(*((s) + 1)) >= 0xA2))         \
-                    &&  LIKELY((s) + UTF8SKIP(s) <= (e)))                   \
-                    ? _is_utf8_char_helper(s, s + UTF8SKIP(s), 0) : 0)
+                 ((    ((e) > (s) + 4)                                      \
+                   &&          (NATIVE_UTF8_TO_I8(*(s)) >= 0xF9)            \
+                   &&  UNLIKELY(    NATIVE_UTF8_TO_I8(*(s)) >  0xF9         \
+                                || (NATIVE_UTF8_TO_I8(*((s) + 1)) >= 0xA2)) \
+                   &&  LIKELY((s) + UTF8SKIP(s) <= (e)))                    \
+                 ?  is_utf8_char_helper(s, s + UTF8SKIP(s), 0) : 0

 #else
 #   define UTF8_IS_SUPER(s, e)                                              \
 #else
 #   define UTF8_IS_SUPER(s, e)                                              \

-                   ((    LIKELY((e) > (s) + 3)                              \
+                   ((    ((e) > (s) + 3)                                    \

                      &&  (*(U8*) (s)) >= 0xF4                               \
                      &&  (*(U8*) (s)) >= 0xF4                               \

-                     && ((*(U8*) (s)) >  0xF4 || (*((U8*) (s) + 1) >= 0x90))\
+                     && (UNLIKELY(   ((*(U8*) (s)) >  0xF4)                 \
+                                  || (*((U8*) (s) + 1) >= 0x90)))           \

                      &&  LIKELY((s) + UTF8SKIP(s) <= (e)))                  \
                      &&  LIKELY((s) + UTF8SKIP(s) <= (e)))                  \

-                    ? _is_utf8_char_helper(s, s + UTF8SKIP(s), 0) : 0)
+                    ?  is_utf8_char_helper(s, s + UTF8SKIP(s), 0) : 0)

 #endif
 
 /* These are now machine generated, and the 'given' clause is no longer
 #endif
 
 /* These are now machine generated, and the 'given' clause is no longer


@@ -891,6 +906,10 @@ of the Unicode non-character code points; otherwise it evaluates to 0.  If
 non-zero, the value gives how many bytes starting at C<s> comprise the code
 point's representation.
 
 non-zero, the value gives how many bytes starting at C<s> comprise the code
 point's representation.
 

+=for apidoc AmnU|UV|UNICODE_REPLACEMENT
+
+Evaluates to 0xFFFD, the code point of the Unicode REPLACEMENT CHARACTER
+

 =cut
  */
 #define UTF8_IS_NONCHAR(s, e)                                                  \
 =cut
  */
 #define UTF8_IS_NONCHAR(s, e)                                                  \


@@ -905,14 +924,26 @@ point's representation.
  * let's be conservative and do as Unicode says. */
 #define PERL_UNICODE_MAX       0x10FFFF
 
  * let's be conservative and do as Unicode says. */
 #define PERL_UNICODE_MAX       0x10FFFF
 

-#define UNICODE_WARN_SURROGATE        0x0001   /* UTF-16 surrogates */
-#define UNICODE_WARN_NONCHAR          0x0002   /* Non-char code points */
-#define UNICODE_WARN_SUPER            0x0004   /* Above 0x10FFFF */
-#define UNICODE_WARN_ABOVE_31_BIT     0x0008   /* Above 0x7FFF_FFFF */
-#define UNICODE_DISALLOW_SURROGATE    0x0010
-#define UNICODE_DISALLOW_NONCHAR      0x0020
-#define UNICODE_DISALLOW_SUPER        0x0040
-#define UNICODE_DISALLOW_ABOVE_31_BIT 0x0080
+#define UNICODE_WARN_SURROGATE         0x0001  /* UTF-16 surrogates */
+#define UNICODE_WARN_NONCHAR           0x0002  /* Non-char code points */
+#define UNICODE_WARN_SUPER             0x0004  /* Above 0x10FFFF */
+#define UNICODE_WARN_PERL_EXTENDED     0x0008  /* Above 0x7FFF_FFFF */
+#define UNICODE_WARN_ABOVE_31_BIT      UNICODE_WARN_PERL_EXTENDED
+#define UNICODE_DISALLOW_SURROGATE     0x0010
+#define UNICODE_DISALLOW_NONCHAR       0x0020
+#define UNICODE_DISALLOW_SUPER         0x0040
+#define UNICODE_DISALLOW_PERL_EXTENDED 0x0080
+
+#ifdef PERL_CORE
+#  define UNICODE_ALLOW_ABOVE_IV_MAX   0x0100
+#endif
+#define UNICODE_DISALLOW_ABOVE_31_BIT  UNICODE_DISALLOW_PERL_EXTENDED
+
+#define UNICODE_GOT_SURROGATE       UNICODE_DISALLOW_SURROGATE
+#define UNICODE_GOT_NONCHAR         UNICODE_DISALLOW_NONCHAR
+#define UNICODE_GOT_SUPER           UNICODE_DISALLOW_SUPER
+#define UNICODE_GOT_PERL_EXTENDED   UNICODE_DISALLOW_PERL_EXTENDED
+

 #define UNICODE_WARN_ILLEGAL_C9_INTERCHANGE                                   \
                                   (UNICODE_WARN_SURROGATE|UNICODE_WARN_SUPER)
 #define UNICODE_WARN_ILLEGAL_INTERCHANGE                                      \
 #define UNICODE_WARN_ILLEGAL_C9_INTERCHANGE                                   \
                                   (UNICODE_WARN_SURROGATE|UNICODE_WARN_SUPER)
 #define UNICODE_WARN_ILLEGAL_INTERCHANGE                                      \


@@ -929,29 +960,29 @@ point's representation.
 
 /* This matches the 2048 code points between UNICODE_SURROGATE_FIRST (0xD800) and
  * UNICODE_SURROGATE_LAST (0xDFFF) */
 
 /* This matches the 2048 code points between UNICODE_SURROGATE_FIRST (0xD800) and
  * UNICODE_SURROGATE_LAST (0xDFFF) */

-#define UNICODE_IS_SURROGATE(uv)        (((UV) (uv) & (~0xFFFF | 0xF800))       \
+#define UNICODE_IS_SURROGATE(uv)  UNLIKELY(((UV) (uv) & (~0xFFFF | 0xF800))     \

                                                                     == 0xD800)
 
                                                                     == 0xD800)
 

-#define UNICODE_IS_REPLACEMENT(uv)     ((UV) (uv) == UNICODE_REPLACEMENT)
-#define UNICODE_IS_BYTE_ORDER_MARK(uv) ((UV) (uv) == UNICODE_BYTE_ORDER_MARK)
+#define UNICODE_IS_REPLACEMENT(uv)  UNLIKELY((UV) (uv) == UNICODE_REPLACEMENT)
+#define UNICODE_IS_BYTE_ORDER_MARK(uv) UNLIKELY((UV) (uv)                      \
+                                                    == UNICODE_BYTE_ORDER_MARK)

 
 /* Is 'uv' one of the 32 contiguous-range noncharacters? */
 
 /* Is 'uv' one of the 32 contiguous-range noncharacters? */

-#define UNICODE_IS_32_CONTIGUOUS_NONCHARS(uv)      ((UV) (uv) >= 0xFDD0         \
-                                                 && (UV) (uv) <= 0xFDEF)
+#define UNICODE_IS_32_CONTIGUOUS_NONCHARS(uv)   UNLIKELY((UV) (uv) >= 0xFDD0    \
+                                                      && (UV) (uv) <= 0xFDEF)

 
 /* Is 'uv' one of the 34 plane-ending noncharacters 0xFFFE, 0xFFFF, 0x1FFFE,
  * 0x1FFFF, ... 0x10FFFE, 0x10FFFF, given that we know that 'uv' is not above
  * the Unicode legal max */
 #define UNICODE_IS_END_PLANE_NONCHAR_GIVEN_NOT_SUPER(uv)                        \
 
 /* Is 'uv' one of the 34 plane-ending noncharacters 0xFFFE, 0xFFFF, 0x1FFFE,
  * 0x1FFFF, ... 0x10FFFE, 0x10FFFF, given that we know that 'uv' is not above
  * the Unicode legal max */
 #define UNICODE_IS_END_PLANE_NONCHAR_GIVEN_NOT_SUPER(uv)                        \

-                                              (((UV) (uv) & 0xFFFE) == 0xFFFE)
+                                      UNLIKELY(((UV) (uv) & 0xFFFE) == 0xFFFE)

 
 #define UNICODE_IS_NONCHAR(uv)                                                  \
     (   UNICODE_IS_32_CONTIGUOUS_NONCHARS(uv)                                   \
      || (   LIKELY( ! UNICODE_IS_SUPER(uv))                                     \
          && UNICODE_IS_END_PLANE_NONCHAR_GIVEN_NOT_SUPER(uv)))
 
 
 #define UNICODE_IS_NONCHAR(uv)                                                  \
     (   UNICODE_IS_32_CONTIGUOUS_NONCHARS(uv)                                   \
      || (   LIKELY( ! UNICODE_IS_SUPER(uv))                                     \
          && UNICODE_IS_END_PLANE_NONCHAR_GIVEN_NOT_SUPER(uv)))
 

-#define UNICODE_IS_SUPER(uv)    ((UV) (uv) > PERL_UNICODE_MAX)
-#define UNICODE_IS_ABOVE_31_BIT(uv)    ((UV) (uv) > 0x7FFFFFFF)
+#define UNICODE_IS_SUPER(uv)    UNLIKELY((UV) (uv) > PERL_UNICODE_MAX)

 
 #define LATIN_SMALL_LETTER_SHARP_S      LATIN_SMALL_LETTER_SHARP_S_NATIVE
 #define LATIN_SMALL_LETTER_Y_WITH_DIAERESIS                                  \
 
 #define LATIN_SMALL_LETTER_SHARP_S      LATIN_SMALL_LETTER_SHARP_S_NATIVE
 #define LATIN_SMALL_LETTER_Y_WITH_DIAERESIS                                  \


@@ -981,141 +1012,21 @@ point's representation.
 
 #define UNI_DISPLAY_ISPRINT    0x0001
 #define UNI_DISPLAY_BACKSLASH  0x0002
 
 #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)
+#define UNI_DISPLAY_BACKSPACE  0x0004  /* Allow \b when also
+                                           UNI_DISPLAY_BACKSLASH */
+#define UNI_DISPLAY_QQ         (UNI_DISPLAY_ISPRINT                \
+                                |UNI_DISPLAY_BACKSLASH              \
+                                |UNI_DISPLAY_BACKSPACE)

 
 

-#define ANYOF_FOLD_SHARP_S(node, input, end)   \
-       (ANYOF_BITMAP_TEST(node, LATIN_SMALL_LETTER_SHARP_S) && \
-        (ANYOF_NONBITMAP(node)) && \
-        (ANYOF_FLAGS(node) & ANYOF_LOC_NONBITMAP_FOLD) && \
-        ((end) > (input) + 1) && \
-        isALPHA_FOLD_EQ((input)[0], 's'))
+/* Character classes could also allow \b, but not patterns in general */
+#define UNI_DISPLAY_REGEX      (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)

 
 

+/* Should be removed; maybe deprecated, but not used in CPAN */

 #define SHARP_S_SKIP 2
 
 #define SHARP_S_SKIP 2
 

-/*
-
-=for apidoc Am|STRLEN|isUTF8_CHAR|const U8 *s|const U8 *e
-
-Evaluates to non-zero if the first few bytes of the string starting at C<s> and
-looking no further than S<C<e - 1>> are well-formed UTF-8, as extended by Perl,
-that represents some code point; otherwise it evaluates to 0.  If non-zero, the
-value gives how many bytes starting at C<s> comprise the code point's
-representation.  Any bytes remaining before C<e>, but beyond the ones needed to
-form the first code point in C<s>, are not examined.
-
-The code point can be any that will fit in a UV on this machine, using Perl's
-extension to official UTF-8 to represent those higher than the Unicode maximum
-of 0x10FFFF.  That means that this macro is used to efficiently decide if the
-next few bytes in C<s> is legal UTF-8 for a single character.
-
-Use C<L</isSTRICT_UTF8_CHAR>> to restrict the acceptable code points to those
-defined by Unicode to be fully interchangeable across applications;
-C<L</isC9_STRICT_UTF8_CHAR>> to use the L<Unicode Corrigendum
-#9|http://www.unicode.org/versions/corrigendum9.html> definition of allowable
-code points; and C<L</isUTF8_CHAR_flags>> for a more customized definition.
-
-Use C<L</is_utf8_string>>, C<L</is_utf8_string_loc>>, and
-C<L</is_utf8_string_loclen>> to check entire strings.
-
-Note that it is deprecated to use code points higher than what will fit in an
-IV.  This macro does not raise any warnings for such code points, treating them
-as valid.
-
-Note also that a UTF-8 INVARIANT character (i.e. ASCII on non-EBCDIC machines)
-is a valid UTF-8 character.
-
-=cut
-*/
-
-#define isUTF8_CHAR(s, e)                                                   \
-    (UNLIKELY((e) <= (s))                                                   \
-    ? 0                                                                     \
-    : (UTF8_IS_INVARIANT(*s))                                               \
-      ? 1                                                                   \
-      : UNLIKELY(((e) - (s)) < UTF8SKIP(s))                                 \
-        ? 0                                                                 \
-        : LIKELY(NATIVE_UTF8_TO_I8(*s) <= _IS_UTF8_CHAR_HIGHEST_START_BYTE) \
-          ? is_UTF8_CHAR_utf8_no_length_checks(s)                           \
-          : _is_utf8_char_helper(s, e, 0))
-

 #define is_utf8_char_buf(buf, buf_end) isUTF8_CHAR(buf, buf_end)
 #define is_utf8_char_buf(buf, buf_end) isUTF8_CHAR(buf, buf_end)

-
-/*
-
-=for apidoc Am|STRLEN|isSTRICT_UTF8_CHAR|const U8 *s|const U8 *e
-
-Evaluates to non-zero if the first few bytes of the string starting at C<s> and
-looking no further than S<C<e - 1>> are well-formed UTF-8 that represents some
-Unicode code point completely acceptable for open interchange between all
-applications; otherwise it evaluates to 0.  If non-zero, the value gives how
-many bytes starting at C<s> comprise the code point's representation.  Any
-bytes remaining before C<e>, but beyond the ones needed to form the first code
-point in C<s>, are not examined.
-
-The largest acceptable code point is the Unicode maximum 0x10FFFF, and must not
-be a surrogate nor a non-character code point.  Thus this excludes any code
-point from Perl's extended UTF-8.
-
-This is used to efficiently decide if the next few bytes in C<s> is
-legal Unicode-acceptable UTF-8 for a single character.
-
-Use C<L</isC9_STRICT_UTF8_CHAR>> to use the L<Unicode Corrigendum
-#9|http://www.unicode.org/versions/corrigendum9.html> definition of allowable
-code points; C<L</isUTF8_CHAR>> to check for Perl's extended UTF-8;
-and C<L</isUTF8_CHAR_flags>> for a more customized definition.
-
-Use C<L</is_strict_utf8_string>>, C<L</is_strict_utf8_string_loc>>, and
-C<L</is_strict_utf8_string_loclen>> to check entire strings.
-
-=cut
-*/
-
-#define isSTRICT_UTF8_CHAR(s, e)                                            \
-    (UNLIKELY((e) <= (s))                                                   \
-    ? 0                                                                     \
-    : (UTF8_IS_INVARIANT(*s))                                               \
-      ? 1                                                                   \
-      : UNLIKELY(((e) - (s)) < UTF8SKIP(s))                                 \
-        ? 0                                                                 \
-        : is_STRICT_UTF8_CHAR_utf8_no_length_checks(s))
-
-/*
-
-=for apidoc Am|STRLEN|isC9_STRICT_UTF8_CHAR|const U8 *s|const U8 *e
-
-Evaluates to non-zero if the first few bytes of the string starting at C<s> and
-looking no further than S<C<e - 1>> are well-formed UTF-8 that represents some
-Unicode non-surrogate code point; otherwise it evaluates to 0.  If non-zero,
-the value gives how many bytes starting at C<s> comprise the code point's
-representation.  Any bytes remaining before C<e>, but beyond the ones needed to
-form the first code point in C<s>, are not examined.
-
-The largest acceptable code point is the Unicode maximum 0x10FFFF.  This
-differs from C<L</isSTRICT_UTF8_CHAR>> only in that it accepts non-character
-code points.  This corresponds to
-L<Unicode Corrigendum #9|http://www.unicode.org/versions/corrigendum9.html>.
-which said that non-character code points are merely discouraged rather than
-completely forbidden in open interchange.  See
-L<perlunicode/Noncharacter code points>.
-
-Use C<L</isUTF8_CHAR>> to check for Perl's extended UTF-8; and
-C<L</isUTF8_CHAR_flags>> for a more customized definition.
-
-Use C<L</is_c9strict_utf8_string>>, C<L</is_c9strict_utf8_string_loc>>, and
-C<L</is_c9strict_utf8_string_loclen>> to check entire strings.
-
-=cut
-*/
-
-#define isC9_STRICT_UTF8_CHAR(s, e)                                         \
-    (UNLIKELY((e) <= (s))                                                   \
-    ? 0                                                                     \
-    : (UTF8_IS_INVARIANT(*s))                                               \
-      ? 1                                                                   \
-      : UNLIKELY(((e) - (s)) < UTF8SKIP(s))                                 \
-        ? 0                                                                 \
-        : is_C9_STRICT_UTF8_CHAR_utf8_no_length_checks(s))
+#define bytes_from_utf8(s, lenp, is_utf8p)                                  \
+                            bytes_from_utf8_loc(s, lenp, is_utf8p, 0)

 
 /*
 
 
 /*
 


@@ -1154,13 +1065,13 @@ L</is_utf8_string_loclen_flags> to check entire strings.
       ? 1                                                                   \
       : UNLIKELY(((e) - (s)) < UTF8SKIP(s))                                 \
         ? 0                                                                 \
       ? 1                                                                   \
       : UNLIKELY(((e) - (s)) < UTF8SKIP(s))                                 \
         ? 0                                                                 \

-        : _is_utf8_char_helper(s, e, flags))
+        : is_utf8_char_helper(s, e, flags))

 
 /* Do not use; should be deprecated.  Use isUTF8_CHAR() instead; this is
  * retained solely for backwards compatibility */
 #define IS_UTF8_CHAR(p, n)      (isUTF8_CHAR(p, (p) + (n)) == n)
 
 
 /* Do not use; should be deprecated.  Use isUTF8_CHAR() instead; this is
  * retained solely for backwards compatibility */
 #define IS_UTF8_CHAR(p, n)      (isUTF8_CHAR(p, (p) + (n)) == n)
 

-#endif /* H_UTF8 */
+#endif /* PERL_UTF8_H_ */

 
 /*
  * ex: set ts=8 sts=4 sw=4 et:
 
 /*
  * ex: set ts=8 sts=4 sw=4 et: