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- /* utf8.h
- *
- * Copyright (C) 2000, 2001, 2002, by Larry Wall and others
- *
- * You may distribute under the terms of either the GNU General Public
- * License or the Artistic License, as specified in the README file.
- *
- */
-
- /* Use UTF-8 as the default script encoding?
- * Turning this on will break scripts having non-UTF-8 binary
- * data (such as Latin-1) in string literals. */
- #ifdef USE_UTF8_SCRIPTS
- # define USE_UTF8_IN_NAMES (!IN_BYTES)
- #else
- # define USE_UTF8_IN_NAMES (PL_hints & HINT_UTF8)
- #endif
-
- #ifdef EBCDIC
- /* The equivalent of these macros but implementing UTF-EBCDIC
- are in the following header file:
- */
-
- #include "utfebcdic.h"
- #else
- START_EXTERN_C
-
- #ifdef DOINIT
- EXTCONST unsigned char PL_utf8skip[] = {
- 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
- 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
- 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
- 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
- 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus */
- 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus */
- 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* scripts */
- 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,6, /* cjk etc. */
- 7,13, /* Perl extended (not UTF-8). Up to 72bit allowed (64-bit + reserved). */
- };
- #else
- EXTCONST unsigned char PL_utf8skip[];
- #endif
-
- END_EXTERN_C
- #define UTF8SKIP(s) PL_utf8skip[*(U8*)s]
-
- /* Native character to iso-8859-1 */
- #define NATIVE_TO_ASCII(ch) (ch)
- #define ASCII_TO_NATIVE(ch) (ch)
- /* Transform after encoding */
- #define NATIVE_TO_UTF(ch) (ch)
- #define UTF_TO_NATIVE(ch) (ch)
- /* Transforms in wide UV chars */
- #define UNI_TO_NATIVE(ch) (ch)
- #define NATIVE_TO_UNI(ch) (ch)
- /* Transforms in invariant space */
- #define NATIVE_TO_NEED(enc,ch) (ch)
- #define ASCII_TO_NEED(enc,ch) (ch)
-
- /* As there are no translations avoid the function wrapper */
- #define Perl_utf8n_to_uvchr Perl_utf8n_to_uvuni
- #define Perl_uvchr_to_utf8 Perl_uvuni_to_utf8
-
- /*
-
- The following table is from Unicode 3.2.
-
- Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
-
- U+0000..U+007F 00..7F
- U+0080..U+07FF C2..DF 80..BF
- U+0800..U+0FFF E0 A0..BF 80..BF
- U+1000..U+CFFF E1..EC 80..BF 80..BF
- U+D000..U+D7FF ED 80..9F 80..BF
- U+D800..U+DFFF ******* ill-formed *******
- U+E000..U+FFFF EE..EF 80..BF 80..BF
- U+10000..U+3FFFF F0 90..BF 80..BF 80..BF
- U+40000..U+FFFFF F1..F3 80..BF 80..BF 80..BF
- U+100000..U+10FFFF F4 80..8F 80..BF 80..BF
-
- Note the A0..BF in U+0800..U+0FFF, the 80..9F in U+D000...U+D7FF,
- the 90..BF in U+10000..U+3FFFF, and the 80...8F in U+100000..U+10FFFF.
- The "gaps" are caused by legal UTF-8 avoiding non-shortest encodings:
- it is technically possible to UTF-8-encode a single code point in different
- ways, but that is explicitly forbidden, and the shortest possible encoding
- should always be used (and that is what Perl does).
-
- */
-
- /*
- Another way to look at it, as bits:
-
- Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
-
- 0aaaaaaa 0aaaaaaa
- 00000bbbbbaaaaaa 110bbbbb 10aaaaaa
- ccccbbbbbbaaaaaa 1110cccc 10bbbbbb 10aaaaaa
- 00000dddccccccbbbbbbaaaaaa 11110ddd 10cccccc 10bbbbbb 10aaaaaa
-
- As you can see, the continuation bytes all begin with C<10>, and the
- leading bits of the start byte tell how many bytes the are in the
- encoded character.
-
- */
-
-
- #define UNI_IS_INVARIANT(c) (((UV)c) < 0x80)
- #define UTF8_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE_TO_UTF(c))
- #define NATIVE_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE_TO_ASCII(c))
- #define UTF8_IS_START(c) (((U8)c) >= 0xc0 && (((U8)c) <= 0xfd))
- #define UTF8_IS_CONTINUATION(c) (((U8)c) >= 0x80 && (((U8)c) <= 0xbf))
- #define UTF8_IS_CONTINUED(c) (((U8)c) & 0x80)
- #define UTF8_IS_DOWNGRADEABLE_START(c) (((U8)c & 0xfc) == 0xc0)
-
- #define UTF_START_MARK(len) ((len > 7) ? 0xFF : (0xFE << (7-len)))
- #define UTF_START_MASK(len) ((len >= 7) ? 0x00 : (0x1F >> (len-2)))
-
- #define UTF_CONTINUATION_MARK 0x80
- #define UTF_ACCUMULATION_SHIFT 6
- #define UTF_CONTINUATION_MASK ((U8)0x3f)
- #define UTF8_ACCUMULATE(old, new) (((old) << UTF_ACCUMULATION_SHIFT) | (((U8)new) & UTF_CONTINUATION_MASK))
-
- #define UTF8_EIGHT_BIT_HI(c) ((((U8)(c))>>UTF_ACCUMULATION_SHIFT)|UTF_START_MARK(2))
- #define UTF8_EIGHT_BIT_LO(c) (((((U8)(c)))&UTF_CONTINUATION_MASK)|UTF_CONTINUATION_MARK)
-
- #ifdef HAS_QUAD
- #define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
- (uv) < 0x800 ? 2 : \
- (uv) < 0x10000 ? 3 : \
- (uv) < 0x200000 ? 4 : \
- (uv) < 0x4000000 ? 5 : \
- (uv) < 0x80000000 ? 6 : \
- (uv) < UTF8_QUAD_MAX ? 7 : 13 )
- #else
- /* No, I'm not even going to *TRY* putting #ifdef inside a #define */
- #define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
- (uv) < 0x800 ? 2 : \
- (uv) < 0x10000 ? 3 : \
- (uv) < 0x200000 ? 4 : \
- (uv) < 0x4000000 ? 5 : \
- (uv) < 0x80000000 ? 6 : 7 )
- #endif
-
- /*
- * Note: we try to be careful never to call the isXXX_utf8() functions
- * unless we're pretty sure we've seen the beginning of a UTF-8 character
- * (that is, the two high bits are set). Otherwise we risk loading in the
- * heavy-duty SWASHINIT and SWASHGET routines unnecessarily.
- */
- #define isIDFIRST_lazy_if(p,c) ((IN_BYTES || (!c || (*((U8*)p) < 0xc0))) \
- ? isIDFIRST(*(p)) \
- : isIDFIRST_utf8((U8*)p))
- #define isALNUM_lazy_if(p,c) ((IN_BYTES || (!c || (*((U8*)p) < 0xc0))) \
- ? isALNUM(*(p)) \
- : isALNUM_utf8((U8*)p))
-
-
- #endif /* EBCDIC vs ASCII */
-
- /* Rest of these are attributes of Unicode and perl's internals rather than the encoding */
-
- #define isIDFIRST_lazy(p) isIDFIRST_lazy_if(p,1)
- #define isALNUM_lazy(p) isALNUM_lazy_if(p,1)
-
- /* how wide can a single UTF-8 encoded character become */
- #define UTF8_MAXLEN 13
- /* how wide a character can become when upper/lowercased */
- #define UTF8_MAXLEN_UCLC_MULT 3
- #define UTF8_MAXLEN_UCLC (UTF8_MAXLEN*UTF8_MAXLEN_UCLC_MULT)
- /* how wide a character can become when casefolded */
- #define UTF8_MAXLEN_FOLD_MULT 3
- #define UTF8_MAXLEN_FOLD (UTF8_MAXLEN*UTF8_MAXLEN_FOLD_MULT)
-
- #define IN_BYTES (PL_curcop->op_private & 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
- #define UTF8_ALLOW_SHORT 0x0010
- #define UTF8_ALLOW_SURROGATE 0x0020
- #define UTF8_ALLOW_FFFF 0x0040 /* Allows also FFFE. */
- #define UTF8_ALLOW_LONG 0x0080
- #define UTF8_ALLOW_ANYUV (UTF8_ALLOW_EMPTY|UTF8_ALLOW_FE_FF|\
- UTF8_ALLOW_SURROGATE|\
- UTF8_ALLOW_FFFF|UTF8_ALLOW_LONG)
- #define UTF8_ALLOW_ANY 0x00FF
- #define UTF8_CHECK_ONLY 0x0200
-
- #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 0xFFF[EF], 0x1FFF[EF], ... */
- #define UNICODE_ALLOW_SUPER 0x0008 /* Allow past 10xFFFF */
- #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)
-
- #ifdef EBCDIC
- # define ANYOF_FOLD_SHARP_S(node, input, end) \
- (ANYOF_BITMAP_TEST(node, EBCDIC_LATIN_SMALL_LETTER_SHARP_S) && \
- (ANYOF_FLAGS(node) & ANYOF_UNICODE) && \
- (ANYOF_FLAGS(node) & ANYOF_FOLD) && \
- ((end) > (input) + 1) && \
- toLOWER((input)[0]) == 's' && \
- toLOWER((input)[1]) == 's')
- #else
- # define ANYOF_FOLD_SHARP_S(node, input, end) \
- (ANYOF_BITMAP_TEST(node, UNICODE_LATIN_SMALL_LETTER_SHARP_S) && \
- (ANYOF_FLAGS(node) & ANYOF_UNICODE) && \
- (ANYOF_FLAGS(node) & ANYOF_FOLD) && \
- ((end) > (input) + 1) && \
- toLOWER((input)[0]) == 's' && \
- toLOWER((input)[1]) == 's')
- #endif
- #define SHARP_S_SKIP 2
-