X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/6f06b55ffd47b279dd1684acb9b556a45e4754a3..104a8018a78d3956ea3ab53f0abbda41773a7f35:/utf8.h diff --git a/utf8.h b/utf8.h index 51d0143..5ffee5b 100644 --- a/utf8.h +++ b/utf8.h @@ -1,12 +1,35 @@ /* utf8.h * - * Copyright (c) 1998, Larry Wall + * Copyright (C) 2000, 2001, 2002, 2005, 2006 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 + +/* Source backward compatibility. */ +#define uvuni_to_utf8(d, uv) uvuni_to_utf8_flags(d, uv, 0) +#define is_utf8_string_loc(s, len, ep) is_utf8_string_loclen(s, len, ep, 0) + +#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 */ @@ -16,12 +39,304 @@ 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, /* 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 */ -3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,6,7,8, /* cjk etc. */ +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 -#define IN_UTF8 (PL_curcop->op_private & HINT_UTF8) +END_EXTERN_C +#define UTF8SKIP(s) PL_utf8skip[*(const 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 utf8n_to_uvchr utf8n_to_uvuni +#define uvchr_to_utf8 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 swash_init and swash_fetch routines unnecessarily. + */ +#define isIDFIRST_lazy_if(p,c) ((IN_BYTES || (!c || (*((const U8*)p) < 0xc0))) \ + ? isIDFIRST(*(p)) \ + : isIDFIRST_utf8((const U8*)p)) +#define isALNUM_lazy_if(p,c) ((IN_BYTES || (!c || (*((const U8*)p) < 0xc0))) \ + ? isALNUM(*(p)) \ + : isALNUM_utf8((const 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) + +#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) + +#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 + +#ifdef EBCDIC +/* IS_UTF8_CHAR() is not ported to EBCDIC */ +#else +#define IS_UTF8_CHAR_1(p) \ + ((p)[0] <= 0x7F) +#define IS_UTF8_CHAR_2(p) \ + ((p)[0] >= 0xC2 && (p)[0] <= 0xDF && \ + (p)[1] >= 0x80 && (p)[1] <= 0xBF) +#define IS_UTF8_CHAR_3a(p) \ + ((p)[0] == 0xE0 && \ + (p)[1] >= 0xA0 && (p)[1] <= 0xBF && \ + (p)[2] >= 0x80 && (p)[2] <= 0xBF) +#define IS_UTF8_CHAR_3b(p) \ + ((p)[0] >= 0xE1 && (p)[0] <= 0xEC && \ + (p)[1] >= 0x80 && (p)[1] <= 0xBF && \ + (p)[2] >= 0x80 && (p)[2] <= 0xBF) +#define IS_UTF8_CHAR_3c(p) \ + ((p)[0] == 0xED && \ + (p)[1] >= 0x80 && (p)[1] <= 0xBF && \ + (p)[2] >= 0x80 && (p)[2] <= 0xBF) +/* In IS_UTF8_CHAR_3c(p) one could use + * (p)[1] >= 0x80 && (p)[1] <= 0x9F + * if one wanted to exclude surrogates. */ +#define IS_UTF8_CHAR_3d(p) \ + ((p)[0] >= 0xEE && (p)[0] <= 0xEF && \ + (p)[1] >= 0x80 && (p)[1] <= 0xBF && \ + (p)[2] >= 0x80 && (p)[2] <= 0xBF) +#define IS_UTF8_CHAR_4a(p) \ + ((p)[0] == 0xF0 && \ + (p)[1] >= 0x90 && (p)[1] <= 0xBF && \ + (p)[2] >= 0x80 && (p)[2] <= 0xBF && \ + (p)[3] >= 0x80 && (p)[3] <= 0xBF) +#define IS_UTF8_CHAR_4b(p) \ + ((p)[0] >= 0xF1 && (p)[0] <= 0xF3 && \ + (p)[1] >= 0x80 && (p)[1] <= 0xBF && \ + (p)[2] >= 0x80 && (p)[2] <= 0xBF && \ + (p)[3] >= 0x80 && (p)[3] <= 0xBF) +/* In IS_UTF8_CHAR_4c(p) one could use + * (p)[0] == 0xF4 + * if one wanted to stop at the Unicode limit U+10FFFF. + * The 0xF7 allows us to go to 0x1fffff (0x200000 would + * require five bytes). Not doing any further code points + * since that is not needed (and that would not be strict + * UTF-8, anyway). The "slow path" in Perl_is_utf8_char() + * will take care of the "extended UTF-8". */ +#define IS_UTF8_CHAR_4c(p) \ + ((p)[0] == 0xF4 && (p)[0] <= 0xF7 && \ + (p)[1] >= 0x80 && (p)[1] <= 0xBF && \ + (p)[2] >= 0x80 && (p)[2] <= 0xBF && \ + (p)[3] >= 0x80 && (p)[3] <= 0xBF) + +#define IS_UTF8_CHAR_3(p) \ + (IS_UTF8_CHAR_3a(p) || \ + IS_UTF8_CHAR_3b(p) || \ + IS_UTF8_CHAR_3c(p) || \ + IS_UTF8_CHAR_3d(p)) +#define IS_UTF8_CHAR_4(p) \ + (IS_UTF8_CHAR_4a(p) || \ + IS_UTF8_CHAR_4b(p) || \ + IS_UTF8_CHAR_4c(p)) + +/* IS_UTF8_CHAR(p) is strictly speaking wrong (not UTF-8) because it + * (1) allows UTF-8 encoded UTF-16 surrogates + * (2) it allows code points past U+10FFFF. + * The Perl_is_utf8_char() full "slow" code will handle the Perl + * "extended UTF-8". */ +#define IS_UTF8_CHAR(p, n) \ + ((n) == 1 ? IS_UTF8_CHAR_1(p) : \ + (n) == 2 ? IS_UTF8_CHAR_2(p) : \ + (n) == 3 ? IS_UTF8_CHAR_3(p) : \ + (n) == 4 ? IS_UTF8_CHAR_4(p) : 0) + +#define IS_UTF8_CHAR_FAST(n) ((n) <= 4) -#define UTF8SKIP(s) PL_utf8skip[*(U8*)s] +#endif /* IS_UTF8_CHAR() for UTF-8 */