3 * Copyright (C) 2000, 2001, 2002, 2005, 2006, 2007, 2009 by Larry Wall and others
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
10 /* Use UTF-8 as the default script encoding?
11 * Turning this on will break scripts having non-UTF-8 binary
12 * data (such as Latin-1) in string literals. */
13 #ifdef USE_UTF8_SCRIPTS
14 # define USE_UTF8_IN_NAMES (!IN_BYTES)
16 # define USE_UTF8_IN_NAMES (PL_hints & HINT_UTF8)
19 /* Source backward compatibility. */
20 #define uvuni_to_utf8(d, uv) uvuni_to_utf8_flags(d, uv, 0)
21 #define is_utf8_string_loc(s, len, ep) is_utf8_string_loclen(s, len, ep, 0)
24 /* The equivalent of these macros but implementing UTF-EBCDIC
25 are in the following header file:
28 #include "utfebcdic.h"
34 EXTCONST unsigned char PL_utf8skip[] = {
35 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 */
36 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 */
37 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 */
38 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 */
39 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 */
40 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 */
41 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 */
42 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. */
43 7,13, /* Perl extended (not UTF-8). Up to 72bit allowed (64-bit + reserved). */
46 EXTCONST unsigned char PL_utf8skip[];
51 /* Native character to iso-8859-1 */
52 #define NATIVE_TO_ASCII(ch) (ch)
53 #define ASCII_TO_NATIVE(ch) (ch)
54 /* Transform after encoding */
55 #define NATIVE_TO_UTF(ch) (ch)
56 #define UTF_TO_NATIVE(ch) (ch)
57 /* Transforms in wide UV chars */
58 #define UNI_TO_NATIVE(ch) (ch)
59 #define NATIVE_TO_UNI(ch) (ch)
60 /* Transforms in invariant space */
61 #define NATIVE_TO_NEED(enc,ch) (ch)
62 #define ASCII_TO_NEED(enc,ch) (ch)
64 /* As there are no translations, avoid the function wrapper */
65 #define utf8n_to_uvchr utf8n_to_uvuni
66 #define uvchr_to_utf8 uvuni_to_utf8
70 The following table is from Unicode 3.2.
72 Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
75 U+0080..U+07FF * C2..DF 80..BF
76 U+0800..U+0FFF E0 * A0..BF 80..BF
77 U+1000..U+CFFF E1..EC 80..BF 80..BF
78 U+D000..U+D7FF ED 80..9F 80..BF
79 U+D800..U+DFFF +++++++ utf16 surrogates, not legal utf8 +++++++
80 U+E000..U+FFFF EE..EF 80..BF 80..BF
81 U+10000..U+3FFFF F0 * 90..BF 80..BF 80..BF
82 U+40000..U+FFFFF F1..F3 80..BF 80..BF 80..BF
83 U+100000..U+10FFFF F4 80..8F 80..BF 80..BF
85 Note the gaps before several of the byte entries above marked by '*'. These are
86 caused by legal UTF-8 avoiding non-shortest encodings: it is technically
87 possible to UTF-8-encode a single code point in different ways, but that is
88 explicitly forbidden, and the shortest possible encoding should always be used
89 (and that is what Perl does).
94 Another way to look at it, as bits:
96 Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
99 00000bbbbbaaaaaa 110bbbbb 10aaaaaa
100 ccccbbbbbbaaaaaa 1110cccc 10bbbbbb 10aaaaaa
101 00000dddccccccbbbbbbaaaaaa 11110ddd 10cccccc 10bbbbbb 10aaaaaa
103 As you can see, the continuation bytes all begin with C<10>, and the
104 leading bits of the start byte tell how many bytes there are in the
110 #define UNI_IS_INVARIANT(c) (((UV)c) < 0x80)
111 /* Note that C0 and C1 are invalid in legal UTF8, so the lower bound of the
112 * below might ought to be C2 */
113 #define UTF8_IS_START(c) (((U8)c) >= 0xc0 && (((U8)c) <= 0xfd))
114 #define UTF8_IS_CONTINUATION(c) (((U8)c) >= 0x80 && (((U8)c) <= 0xbf))
115 #define UTF8_IS_CONTINUED(c) (((U8)c) & 0x80)
116 #define UTF8_IS_DOWNGRADEABLE_START(c) (((U8)c & 0xfc) == 0xc0)
118 #define UTF_START_MARK(len) (((len) > 7) ? 0xFF : (0xFE << (7-(len))))
119 #define UTF_START_MASK(len) (((len) >= 7) ? 0x00 : (0x1F >> ((len)-2)))
121 #define UTF_CONTINUATION_MARK 0x80
122 #define UTF_ACCUMULATION_SHIFT 6
123 #define UTF_CONTINUATION_MASK ((U8)0x3f)
126 #define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
128 (uv) < 0x10000 ? 3 : \
129 (uv) < 0x200000 ? 4 : \
130 (uv) < 0x4000000 ? 5 : \
131 (uv) < 0x80000000 ? 6 : \
132 (uv) < UTF8_QUAD_MAX ? 7 : 13 )
134 /* No, I'm not even going to *TRY* putting #ifdef inside a #define */
135 #define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
137 (uv) < 0x10000 ? 3 : \
138 (uv) < 0x200000 ? 4 : \
139 (uv) < 0x4000000 ? 5 : \
140 (uv) < 0x80000000 ? 6 : 7 )
143 #endif /* EBCDIC vs ASCII */
145 /* Rest of these are attributes of Unicode and perl's internals rather than the
146 * encoding, or happen to be the same in both ASCII and EBCDIC (at least at
147 * this level; the macros that some of these call may have different
148 * definitions in the two encodings */
150 #define NATIVE8_TO_UNI(ch) NATIVE_TO_ASCII(ch) /* a clearer synonym */
152 #define UTF8_ACCUMULATE(old, new) (((old) << UTF_ACCUMULATION_SHIFT) | (((U8)new) & UTF_CONTINUATION_MASK))
154 #define UTF8SKIP(s) PL_utf8skip[*(const U8*)(s)]
156 #define UTF8_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE_TO_UTF(c))
157 #define NATIVE_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE8_TO_UNI(c))
159 #define MAX_PORTABLE_UTF8_TWO_BYTE 0x3FF /* constrained by EBCDIC */
161 /* The macros in the next sets are used to generate the two utf8 or utfebcdic
162 * bytes from an ordinal that is known to fit into two bytes; it must be less
163 * than 0x3FF to work across both encodings. */
164 /* Nocast allows these to be used in the case label of a switch statement */
165 #define UTF8_TWO_BYTE_HI_nocast(c) UTF_TO_NATIVE(((c)>>UTF_ACCUMULATION_SHIFT)|UTF_START_MARK(2))
166 #define UTF8_TWO_BYTE_LO_nocast(c) UTF_TO_NATIVE(((c)&UTF_CONTINUATION_MASK)|UTF_CONTINUATION_MARK)
168 #define UTF8_TWO_BYTE_HI(c) ((U8) (UTF8_TWO_BYTE_HI_nocast(c)))
169 #define UTF8_TWO_BYTE_LO(c) ((U8) (UTF8_TWO_BYTE_LO_nocast(c)))
171 /* This name is used when the source is a single byte */
172 #define UTF8_EIGHT_BIT_HI(c) UTF8_TWO_BYTE_HI((U8)(c))
173 #define UTF8_EIGHT_BIT_LO(c) UTF8_TWO_BYTE_LO((U8)(c))
176 * Note: we try to be careful never to call the isXXX_utf8() functions
177 * unless we're pretty sure we've seen the beginning of a UTF-8 or UTFEBCDIC
178 * character. Otherwise we risk loading in the heavy-duty swash_init and
179 * swash_fetch routines unnecessarily.
181 #define isIDFIRST_lazy_if(p,c) ((IN_BYTES || (!c || ! UTF8_IS_START(*((const U8*)p)))) \
183 : isIDFIRST_utf8((const U8*)p))
184 #define isALNUM_lazy_if(p,c) ((IN_BYTES || (!c || ! UTF8_IS_START(*((const U8*)p)))) \
186 : isALNUM_utf8((const U8*)p))
188 #define isIDFIRST_lazy(p) isIDFIRST_lazy_if(p,1)
189 #define isALNUM_lazy(p) isALNUM_lazy_if(p,1)
191 #define UTF8_MAXBYTES 13
192 /* How wide can a single UTF-8 encoded character become in bytes.
193 * NOTE: Strictly speaking Perl's UTF-8 should not be called UTF-8
194 * since UTF-8 is an encoding of Unicode and given Unicode's current
195 * upper limit only four bytes is possible. Perl thinks of UTF-8
196 * as a way to encode non-negative integers in a binary format. */
197 #define UTF8_MAXLEN UTF8_MAXBYTES
199 /* The maximum number of UTF-8 bytes a single Unicode character can
200 * uppercase/lowercase/fold into; this number depends on the Unicode
201 * version. An example of maximal expansion is the U+03B0 which
202 * uppercases to U+03C5 U+0308 U+0301. The Unicode databases that
203 * tell these things are UnicodeData.txt, CaseFolding.txt, and
204 * SpecialCasing.txt. */
205 #define UTF8_MAXBYTES_CASE 6
207 #define IN_BYTES (CopHINTS_get(PL_curcop) & HINT_BYTES)
208 #define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTES)
209 #define IN_UNI_8_BIT ( (CopHINTS_get(PL_curcop) & HINT_UNI_8_BIT) \
210 && ! IN_LOCALE_RUNTIME && ! IN_BYTES)
212 #define UTF8_ALLOW_EMPTY 0x0001
213 #define UTF8_ALLOW_CONTINUATION 0x0002
214 #define UTF8_ALLOW_NON_CONTINUATION 0x0004
215 #define UTF8_ALLOW_FE_FF 0x0008 /* Allow FE or FF start bytes, \
216 yields above 0x7fffFFFF */
217 #define UTF8_ALLOW_SHORT 0x0010 /* expecting more bytes */
218 #define UTF8_ALLOW_SURROGATE 0x0020
219 #define UTF8_ALLOW_FFFF 0x0040 /* Allow UNICODE_ILLEGAL */
220 #define UTF8_ALLOW_LONG 0x0080 /* expecting fewer bytes */
221 #define UTF8_ALLOW_ANYUV (UTF8_ALLOW_EMPTY|UTF8_ALLOW_FE_FF|\
222 UTF8_ALLOW_SURROGATE|UTF8_ALLOW_FFFF)
223 #define UTF8_ALLOW_ANY 0x00FF
224 #define UTF8_CHECK_ONLY 0x0200
225 #define UTF8_ALLOW_DEFAULT (ckWARN(WARN_UTF8) ? 0 : \
228 #define UNICODE_SURROGATE_FIRST 0xD800
229 #define UNICODE_SURROGATE_LAST 0xDFFF
230 #define UNICODE_REPLACEMENT 0xFFFD
231 #define UNICODE_BYTE_ORDER_MARK 0xFEFF
232 #define UNICODE_ILLEGAL 0xFFFF
234 /* Though our UTF-8 encoding can go beyond this,
235 * let's be conservative and do as Unicode 5.1 says. */
236 #define PERL_UNICODE_MAX 0x10FFFF
238 #define UNICODE_ALLOW_SURROGATE 0x0001 /* Allow UTF-16 surrogates (EVIL) */
239 #define UNICODE_ALLOW_FDD0 0x0002 /* Allow the U+FDD0...U+FDEF */
240 #define UNICODE_ALLOW_FFFF 0x0004 /* Allow U+FFF[EF], U+1FFF[EF], ... */
241 #define UNICODE_ALLOW_SUPER 0x0008 /* Allow past 0x10FFFF */
242 #define UNICODE_ALLOW_ANY 0x000F
244 #define UNICODE_IS_SURROGATE(c) ((c) >= UNICODE_SURROGATE_FIRST && \
245 (c) <= UNICODE_SURROGATE_LAST)
246 #define UNICODE_IS_REPLACEMENT(c) ((c) == UNICODE_REPLACEMENT)
247 #define UNICODE_IS_BYTE_ORDER_MARK(c) ((c) == UNICODE_BYTE_ORDER_MARK)
248 #define UNICODE_IS_ILLEGAL(c) ((c) == UNICODE_ILLEGAL)
251 # define UTF8_QUAD_MAX UINT64_C(0x1000000000)
254 #define UTF8_IS_ASCII(c) UTF8_IS_INVARIANT(c)
256 #define UNICODE_GREEK_CAPITAL_LETTER_SIGMA 0x03A3
257 #define UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA 0x03C2
258 #define UNICODE_GREEK_SMALL_LETTER_SIGMA 0x03C3
260 #define UNI_DISPLAY_ISPRINT 0x0001
261 #define UNI_DISPLAY_BACKSLASH 0x0002
262 #define UNI_DISPLAY_QQ (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
263 #define UNI_DISPLAY_REGEX (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
266 # define LATIN_SMALL_LETTER_SHARP_S 0x00DF
267 # define LATIN_SMALL_LETTER_Y_WITH_DIAERESIS 0x00FF
268 # define MICRO_SIGN 0x00B5
271 #define ANYOF_FOLD_SHARP_S(node, input, end) \
272 (ANYOF_BITMAP_TEST(node, LATIN_SMALL_LETTER_SHARP_S) && \
273 (ANYOF_FLAGS(node) & ANYOF_UNICODE) && \
274 (ANYOF_FLAGS(node) & ANYOF_FOLD) && \
275 ((end) > (input) + 1) && \
276 toLOWER((input)[0]) == 's' && \
277 toLOWER((input)[1]) == 's')
278 #define SHARP_S_SKIP 2
281 /* IS_UTF8_CHAR() is not ported to EBCDIC */
283 #define IS_UTF8_CHAR_1(p) \
285 #define IS_UTF8_CHAR_2(p) \
286 ((p)[0] >= 0xC2 && (p)[0] <= 0xDF && \
287 (p)[1] >= 0x80 && (p)[1] <= 0xBF)
288 #define IS_UTF8_CHAR_3a(p) \
290 (p)[1] >= 0xA0 && (p)[1] <= 0xBF && \
291 (p)[2] >= 0x80 && (p)[2] <= 0xBF)
292 #define IS_UTF8_CHAR_3b(p) \
293 ((p)[0] >= 0xE1 && (p)[0] <= 0xEC && \
294 (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
295 (p)[2] >= 0x80 && (p)[2] <= 0xBF)
296 #define IS_UTF8_CHAR_3c(p) \
298 (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
299 (p)[2] >= 0x80 && (p)[2] <= 0xBF)
300 /* In IS_UTF8_CHAR_3c(p) one could use
301 * (p)[1] >= 0x80 && (p)[1] <= 0x9F
302 * if one wanted to exclude surrogates. */
303 #define IS_UTF8_CHAR_3d(p) \
304 ((p)[0] >= 0xEE && (p)[0] <= 0xEF && \
305 (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
306 (p)[2] >= 0x80 && (p)[2] <= 0xBF)
307 #define IS_UTF8_CHAR_4a(p) \
309 (p)[1] >= 0x90 && (p)[1] <= 0xBF && \
310 (p)[2] >= 0x80 && (p)[2] <= 0xBF && \
311 (p)[3] >= 0x80 && (p)[3] <= 0xBF)
312 #define IS_UTF8_CHAR_4b(p) \
313 ((p)[0] >= 0xF1 && (p)[0] <= 0xF3 && \
314 (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
315 (p)[2] >= 0x80 && (p)[2] <= 0xBF && \
316 (p)[3] >= 0x80 && (p)[3] <= 0xBF)
317 /* In IS_UTF8_CHAR_4c(p) one could use
319 * if one wanted to stop at the Unicode limit U+10FFFF.
320 * The 0xF7 allows us to go to 0x1fffff (0x200000 would
321 * require five bytes). Not doing any further code points
322 * since that is not needed (and that would not be strict
323 * UTF-8, anyway). The "slow path" in Perl_is_utf8_char()
324 * will take care of the "extended UTF-8". */
325 #define IS_UTF8_CHAR_4c(p) \
326 ((p)[0] == 0xF4 && (p)[0] <= 0xF7 && \
327 (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
328 (p)[2] >= 0x80 && (p)[2] <= 0xBF && \
329 (p)[3] >= 0x80 && (p)[3] <= 0xBF)
331 #define IS_UTF8_CHAR_3(p) \
332 (IS_UTF8_CHAR_3a(p) || \
333 IS_UTF8_CHAR_3b(p) || \
334 IS_UTF8_CHAR_3c(p) || \
336 #define IS_UTF8_CHAR_4(p) \
337 (IS_UTF8_CHAR_4a(p) || \
338 IS_UTF8_CHAR_4b(p) || \
341 /* IS_UTF8_CHAR(p) is strictly speaking wrong (not UTF-8) because it
342 * (1) allows UTF-8 encoded UTF-16 surrogates
343 * (2) it allows code points past U+10FFFF.
344 * The Perl_is_utf8_char() full "slow" code will handle the Perl
345 * "extended UTF-8". */
346 #define IS_UTF8_CHAR(p, n) \
347 ((n) == 1 ? IS_UTF8_CHAR_1(p) : \
348 (n) == 2 ? IS_UTF8_CHAR_2(p) : \
349 (n) == 3 ? IS_UTF8_CHAR_3(p) : \
350 (n) == 4 ? IS_UTF8_CHAR_4(p) : 0)
352 #define IS_UTF8_CHAR_FAST(n) ((n) <= 4)
354 #endif /* IS_UTF8_CHAR() for UTF-8 */
358 * c-indentation-style: bsd
360 * indent-tabs-mode: t
363 * ex: set ts=8 sts=4 sw=4 noet: