1 | /* utf8.h
|
---|
2 | *
|
---|
3 | * Copyright (C) 2000, 2001, 2002, 2005 by Larry Wall and others
|
---|
4 | *
|
---|
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.
|
---|
7 | *
|
---|
8 | */
|
---|
9 |
|
---|
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)
|
---|
15 | #else
|
---|
16 | # define USE_UTF8_IN_NAMES (PL_hints & HINT_UTF8)
|
---|
17 | #endif
|
---|
18 |
|
---|
19 | #ifdef EBCDIC
|
---|
20 | /* The equivalent of these macros but implementing UTF-EBCDIC
|
---|
21 | are in the following header file:
|
---|
22 | */
|
---|
23 |
|
---|
24 | #include "utfebcdic.h"
|
---|
25 | #else
|
---|
26 | START_EXTERN_C
|
---|
27 |
|
---|
28 | #ifdef DOINIT
|
---|
29 | EXTCONST unsigned char PL_utf8skip[] = {
|
---|
30 | 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 */
|
---|
31 | 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 */
|
---|
32 | 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 */
|
---|
33 | 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 */
|
---|
34 | 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 */
|
---|
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, /* bogus */
|
---|
36 | 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 */
|
---|
37 | 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. */
|
---|
38 | 7,13, /* Perl extended (not UTF-8). Up to 72bit allowed (64-bit + reserved). */
|
---|
39 | };
|
---|
40 | #else
|
---|
41 | EXTCONST unsigned char PL_utf8skip[];
|
---|
42 | #endif
|
---|
43 |
|
---|
44 | END_EXTERN_C
|
---|
45 | #define UTF8SKIP(s) PL_utf8skip[*(const U8*)s]
|
---|
46 |
|
---|
47 | /* Native character to iso-8859-1 */
|
---|
48 | #define NATIVE_TO_ASCII(ch) (ch)
|
---|
49 | #define ASCII_TO_NATIVE(ch) (ch)
|
---|
50 | /* Transform after encoding */
|
---|
51 | #define NATIVE_TO_UTF(ch) (ch)
|
---|
52 | #define UTF_TO_NATIVE(ch) (ch)
|
---|
53 | /* Transforms in wide UV chars */
|
---|
54 | #define UNI_TO_NATIVE(ch) (ch)
|
---|
55 | #define NATIVE_TO_UNI(ch) (ch)
|
---|
56 | /* Transforms in invariant space */
|
---|
57 | #define NATIVE_TO_NEED(enc,ch) (ch)
|
---|
58 | #define ASCII_TO_NEED(enc,ch) (ch)
|
---|
59 |
|
---|
60 | /* As there are no translations avoid the function wrapper */
|
---|
61 | #define Perl_utf8n_to_uvchr Perl_utf8n_to_uvuni
|
---|
62 | #define Perl_uvchr_to_utf8 Perl_uvuni_to_utf8
|
---|
63 |
|
---|
64 | /*
|
---|
65 |
|
---|
66 | The following table is from Unicode 3.2.
|
---|
67 |
|
---|
68 | Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
|
---|
69 |
|
---|
70 | U+0000..U+007F 00..7F
|
---|
71 | U+0080..U+07FF C2..DF 80..BF
|
---|
72 | U+0800..U+0FFF E0 A0..BF 80..BF
|
---|
73 | U+1000..U+CFFF E1..EC 80..BF 80..BF
|
---|
74 | U+D000..U+D7FF ED 80..9F 80..BF
|
---|
75 | U+D800..U+DFFF ******* ill-formed *******
|
---|
76 | U+E000..U+FFFF EE..EF 80..BF 80..BF
|
---|
77 | U+10000..U+3FFFF F0 90..BF 80..BF 80..BF
|
---|
78 | U+40000..U+FFFFF F1..F3 80..BF 80..BF 80..BF
|
---|
79 | U+100000..U+10FFFF F4 80..8F 80..BF 80..BF
|
---|
80 |
|
---|
81 | Note the A0..BF in U+0800..U+0FFF, the 80..9F in U+D000...U+D7FF,
|
---|
82 | the 90..BF in U+10000..U+3FFFF, and the 80...8F in U+100000..U+10FFFF.
|
---|
83 | The "gaps" are caused by legal UTF-8 avoiding non-shortest encodings:
|
---|
84 | it is technically possible to UTF-8-encode a single code point in different
|
---|
85 | ways, but that is explicitly forbidden, and the shortest possible encoding
|
---|
86 | should always be used (and that is what Perl does).
|
---|
87 |
|
---|
88 | */
|
---|
89 |
|
---|
90 | /*
|
---|
91 | Another way to look at it, as bits:
|
---|
92 |
|
---|
93 | Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
|
---|
94 |
|
---|
95 | 0aaaaaaa 0aaaaaaa
|
---|
96 | 00000bbbbbaaaaaa 110bbbbb 10aaaaaa
|
---|
97 | ccccbbbbbbaaaaaa 1110cccc 10bbbbbb 10aaaaaa
|
---|
98 | 00000dddccccccbbbbbbaaaaaa 11110ddd 10cccccc 10bbbbbb 10aaaaaa
|
---|
99 |
|
---|
100 | As you can see, the continuation bytes all begin with C<10>, and the
|
---|
101 | leading bits of the start byte tell how many bytes the are in the
|
---|
102 | encoded character.
|
---|
103 |
|
---|
104 | */
|
---|
105 |
|
---|
106 |
|
---|
107 | #define UNI_IS_INVARIANT(c) (((UV)c) < 0x80)
|
---|
108 | #define UTF8_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE_TO_UTF(c))
|
---|
109 | #define NATIVE_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE_TO_ASCII(c))
|
---|
110 | #define UTF8_IS_START(c) (((U8)c) >= 0xc0 && (((U8)c) <= 0xfd))
|
---|
111 | #define UTF8_IS_CONTINUATION(c) (((U8)c) >= 0x80 && (((U8)c) <= 0xbf))
|
---|
112 | #define UTF8_IS_CONTINUED(c) (((U8)c) & 0x80)
|
---|
113 | #define UTF8_IS_DOWNGRADEABLE_START(c) (((U8)c & 0xfc) == 0xc0)
|
---|
114 |
|
---|
115 | #define UTF_START_MARK(len) ((len > 7) ? 0xFF : (0xFE << (7-len)))
|
---|
116 | #define UTF_START_MASK(len) ((len >= 7) ? 0x00 : (0x1F >> (len-2)))
|
---|
117 |
|
---|
118 | #define UTF_CONTINUATION_MARK 0x80
|
---|
119 | #define UTF_ACCUMULATION_SHIFT 6
|
---|
120 | #define UTF_CONTINUATION_MASK ((U8)0x3f)
|
---|
121 | #define UTF8_ACCUMULATE(old, new) (((old) << UTF_ACCUMULATION_SHIFT) | (((U8)new) & UTF_CONTINUATION_MASK))
|
---|
122 |
|
---|
123 | #define UTF8_EIGHT_BIT_HI(c) ((((U8)(c))>>UTF_ACCUMULATION_SHIFT)|UTF_START_MARK(2))
|
---|
124 | #define UTF8_EIGHT_BIT_LO(c) (((((U8)(c)))&UTF_CONTINUATION_MASK)|UTF_CONTINUATION_MARK)
|
---|
125 |
|
---|
126 | #ifdef HAS_QUAD
|
---|
127 | #define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
|
---|
128 | (uv) < 0x800 ? 2 : \
|
---|
129 | (uv) < 0x10000 ? 3 : \
|
---|
130 | (uv) < 0x200000 ? 4 : \
|
---|
131 | (uv) < 0x4000000 ? 5 : \
|
---|
132 | (uv) < 0x80000000 ? 6 : \
|
---|
133 | (uv) < UTF8_QUAD_MAX ? 7 : 13 )
|
---|
134 | #else
|
---|
135 | /* No, I'm not even going to *TRY* putting #ifdef inside a #define */
|
---|
136 | #define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
|
---|
137 | (uv) < 0x800 ? 2 : \
|
---|
138 | (uv) < 0x10000 ? 3 : \
|
---|
139 | (uv) < 0x200000 ? 4 : \
|
---|
140 | (uv) < 0x4000000 ? 5 : \
|
---|
141 | (uv) < 0x80000000 ? 6 : 7 )
|
---|
142 | #endif
|
---|
143 |
|
---|
144 | /*
|
---|
145 | * Note: we try to be careful never to call the isXXX_utf8() functions
|
---|
146 | * unless we're pretty sure we've seen the beginning of a UTF-8 character
|
---|
147 | * (that is, the two high bits are set). Otherwise we risk loading in the
|
---|
148 | * heavy-duty SWASHINIT and SWASHGET routines unnecessarily.
|
---|
149 | */
|
---|
150 | #define isIDFIRST_lazy_if(p,c) ((IN_BYTES || (!c || (*((const U8*)p) < 0xc0))) \
|
---|
151 | ? isIDFIRST(*(p)) \
|
---|
152 | : isIDFIRST_utf8((U8*)p))
|
---|
153 | #define isALNUM_lazy_if(p,c) ((IN_BYTES || (!c || (*((const U8*)p) < 0xc0))) \
|
---|
154 | ? isALNUM(*(p)) \
|
---|
155 | : isALNUM_utf8((U8*)p))
|
---|
156 |
|
---|
157 |
|
---|
158 | #endif /* EBCDIC vs ASCII */
|
---|
159 |
|
---|
160 | /* Rest of these are attributes of Unicode and perl's internals rather than the encoding */
|
---|
161 |
|
---|
162 | #define isIDFIRST_lazy(p) isIDFIRST_lazy_if(p,1)
|
---|
163 | #define isALNUM_lazy(p) isALNUM_lazy_if(p,1)
|
---|
164 |
|
---|
165 | #define UTF8_MAXBYTES 13
|
---|
166 | /* How wide can a single UTF-8 encoded character become in bytes.
|
---|
167 | * NOTE: Strictly speaking Perl's UTF-8 should not be called UTF-8
|
---|
168 | * since UTF-8 is an encoding of Unicode and given Unicode's current
|
---|
169 | * upper limit only four bytes is possible. Perl thinks of UTF-8
|
---|
170 | * as a way to encode non-negative integers in a binary format. */
|
---|
171 | #define UTF8_MAXLEN UTF8_MAXBYTES
|
---|
172 |
|
---|
173 | #define UTF8_MAXLEN_UCLC 3 /* Obsolete, do not use. */
|
---|
174 | #define UTF8_MAXLEN_UCLC_MULT 39 /* Obsolete, do not use. */
|
---|
175 | #define UTF8_MAXLEN_FOLD 3 /* Obsolete, do not use. */
|
---|
176 | #define UTF8_MAXLEN_FOLD_MULT 39 /* Obsolete, do not use. */
|
---|
177 |
|
---|
178 | /* The maximum number of UTF-8 bytes a single Unicode character can
|
---|
179 | * uppercase/lowercase/fold into; this number depends on the Unicode
|
---|
180 | * version. An example of maximal expansion is the U+03B0 which
|
---|
181 | * uppercases to U+03C5 U+0308 U+0301. The Unicode databases that
|
---|
182 | * tell these things are UnicodeDatabase.txt, CaseFolding.txt, and
|
---|
183 | * SpecialCasing.txt. */
|
---|
184 | #define UTF8_MAXBYTES_CASE 6
|
---|
185 |
|
---|
186 | #define IN_BYTES (PL_curcop->op_private & HINT_BYTES)
|
---|
187 | #define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTES)
|
---|
188 |
|
---|
189 | #define UTF8_ALLOW_EMPTY 0x0001
|
---|
190 | #define UTF8_ALLOW_CONTINUATION 0x0002
|
---|
191 | #define UTF8_ALLOW_NON_CONTINUATION 0x0004
|
---|
192 | #define UTF8_ALLOW_FE_FF 0x0008
|
---|
193 | #define UTF8_ALLOW_SHORT 0x0010
|
---|
194 | #define UTF8_ALLOW_SURROGATE 0x0020
|
---|
195 | #define UTF8_ALLOW_FFFF 0x0040 /* Allows also FFFE. */
|
---|
196 | #define UTF8_ALLOW_LONG 0x0080
|
---|
197 | #define UTF8_ALLOW_ANYUV (UTF8_ALLOW_EMPTY|UTF8_ALLOW_FE_FF|\
|
---|
198 | UTF8_ALLOW_SURROGATE|UTF8_ALLOW_FFFF)
|
---|
199 | #define UTF8_ALLOW_ANY 0x00FF
|
---|
200 | #define UTF8_CHECK_ONLY 0x0200
|
---|
201 |
|
---|
202 | #define UNICODE_SURROGATE_FIRST 0xD800
|
---|
203 | #define UNICODE_SURROGATE_LAST 0xDFFF
|
---|
204 | #define UNICODE_REPLACEMENT 0xFFFD
|
---|
205 | #define UNICODE_BYTE_ORDER_MARK 0xFEFF
|
---|
206 | #define UNICODE_ILLEGAL 0xFFFF
|
---|
207 |
|
---|
208 | /* Though our UTF-8 encoding can go beyond this,
|
---|
209 | * let's be conservative and do as Unicode 3.2 says. */
|
---|
210 | #define PERL_UNICODE_MAX 0x10FFFF
|
---|
211 |
|
---|
212 | #define UNICODE_ALLOW_SURROGATE 0x0001 /* Allow UTF-16 surrogates (EVIL) */
|
---|
213 | #define UNICODE_ALLOW_FDD0 0x0002 /* Allow the U+FDD0...U+FDEF */
|
---|
214 | #define UNICODE_ALLOW_FFFF 0x0004 /* Allow 0xFFF[EF], 0x1FFF[EF], ... */
|
---|
215 | #define UNICODE_ALLOW_SUPER 0x0008 /* Allow past 10xFFFF */
|
---|
216 | #define UNICODE_ALLOW_ANY 0x000F
|
---|
217 |
|
---|
218 | #define UNICODE_IS_SURROGATE(c) ((c) >= UNICODE_SURROGATE_FIRST && \
|
---|
219 | (c) <= UNICODE_SURROGATE_LAST)
|
---|
220 | #define UNICODE_IS_REPLACEMENT(c) ((c) == UNICODE_REPLACEMENT)
|
---|
221 | #define UNICODE_IS_BYTE_ORDER_MARK(c) ((c) == UNICODE_BYTE_ORDER_MARK)
|
---|
222 | #define UNICODE_IS_ILLEGAL(c) ((c) == UNICODE_ILLEGAL)
|
---|
223 |
|
---|
224 | #ifdef HAS_QUAD
|
---|
225 | # define UTF8_QUAD_MAX UINT64_C(0x1000000000)
|
---|
226 | #endif
|
---|
227 |
|
---|
228 | #define UTF8_IS_ASCII(c) UTF8_IS_INVARIANT(c)
|
---|
229 |
|
---|
230 | #define UNICODE_LATIN_SMALL_LETTER_SHARP_S 0x00DF
|
---|
231 | #define UNICODE_GREEK_CAPITAL_LETTER_SIGMA 0x03A3
|
---|
232 | #define UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA 0x03C2
|
---|
233 | #define UNICODE_GREEK_SMALL_LETTER_SIGMA 0x03C3
|
---|
234 |
|
---|
235 | #define EBCDIC_LATIN_SMALL_LETTER_SHARP_S 0x0059
|
---|
236 |
|
---|
237 | #define UNI_DISPLAY_ISPRINT 0x0001
|
---|
238 | #define UNI_DISPLAY_BACKSLASH 0x0002
|
---|
239 | #define UNI_DISPLAY_QQ (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
|
---|
240 | #define UNI_DISPLAY_REGEX (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
|
---|
241 |
|
---|
242 | #ifdef EBCDIC
|
---|
243 | # define ANYOF_FOLD_SHARP_S(node, input, end) \
|
---|
244 | (ANYOF_BITMAP_TEST(node, EBCDIC_LATIN_SMALL_LETTER_SHARP_S) && \
|
---|
245 | (ANYOF_FLAGS(node) & ANYOF_UNICODE) && \
|
---|
246 | (ANYOF_FLAGS(node) & ANYOF_FOLD) && \
|
---|
247 | ((end) > (input) + 1) && \
|
---|
248 | toLOWER((input)[0]) == 's' && \
|
---|
249 | toLOWER((input)[1]) == 's')
|
---|
250 | #else
|
---|
251 | # define ANYOF_FOLD_SHARP_S(node, input, end) \
|
---|
252 | (ANYOF_BITMAP_TEST(node, UNICODE_LATIN_SMALL_LETTER_SHARP_S) && \
|
---|
253 | (ANYOF_FLAGS(node) & ANYOF_UNICODE) && \
|
---|
254 | (ANYOF_FLAGS(node) & ANYOF_FOLD) && \
|
---|
255 | ((end) > (input) + 1) && \
|
---|
256 | toLOWER((input)[0]) == 's' && \
|
---|
257 | toLOWER((input)[1]) == 's')
|
---|
258 | #endif
|
---|
259 | #define SHARP_S_SKIP 2
|
---|
260 |
|
---|
261 | #ifdef EBCDIC
|
---|
262 | /* IS_UTF8_CHAR() is not ported to EBCDIC */
|
---|
263 | #else
|
---|
264 | #define IS_UTF8_CHAR_1(p) \
|
---|
265 | ((p)[0] <= 0x7F)
|
---|
266 | #define IS_UTF8_CHAR_2(p) \
|
---|
267 | ((p)[0] >= 0xC2 && (p)[0] <= 0xDF && \
|
---|
268 | (p)[1] >= 0x80 && (p)[1] <= 0xBF)
|
---|
269 | #define IS_UTF8_CHAR_3a(p) \
|
---|
270 | ((p)[0] == 0xE0 && \
|
---|
271 | (p)[1] >= 0xA0 && (p)[1] <= 0xBF && \
|
---|
272 | (p)[2] >= 0x80 && (p)[2] <= 0xBF)
|
---|
273 | #define IS_UTF8_CHAR_3b(p) \
|
---|
274 | ((p)[0] >= 0xE1 && (p)[0] <= 0xEC && \
|
---|
275 | (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
|
---|
276 | (p)[2] >= 0x80 && (p)[2] <= 0xBF)
|
---|
277 | #define IS_UTF8_CHAR_3c(p) \
|
---|
278 | ((p)[0] == 0xED && \
|
---|
279 | (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
|
---|
280 | (p)[2] >= 0x80 && (p)[2] <= 0xBF)
|
---|
281 | /* In IS_UTF8_CHAR_3c(p) one could use
|
---|
282 | * (p)[1] >= 0x80 && (p)[1] <= 0x9F
|
---|
283 | * if one wanted to exclude surrogates. */
|
---|
284 | #define IS_UTF8_CHAR_3d(p) \
|
---|
285 | ((p)[0] >= 0xEE && (p)[0] <= 0xEF && \
|
---|
286 | (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
|
---|
287 | (p)[2] >= 0x80 && (p)[2] <= 0xBF)
|
---|
288 | #define IS_UTF8_CHAR_4a(p) \
|
---|
289 | ((p)[0] == 0xF0 && \
|
---|
290 | (p)[1] >= 0x90 && (p)[1] <= 0xBF && \
|
---|
291 | (p)[2] >= 0x80 && (p)[2] <= 0xBF && \
|
---|
292 | (p)[3] >= 0x80 && (p)[3] <= 0xBF)
|
---|
293 | #define IS_UTF8_CHAR_4b(p) \
|
---|
294 | ((p)[0] >= 0xF1 && (p)[0] <= 0xF3 && \
|
---|
295 | (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
|
---|
296 | (p)[2] >= 0x80 && (p)[2] <= 0xBF && \
|
---|
297 | (p)[3] >= 0x80 && (p)[3] <= 0xBF)
|
---|
298 | /* In IS_UTF8_CHAR_4c(p) one could use
|
---|
299 | * (p)[0] == 0xF4
|
---|
300 | * if one wanted to stop at the Unicode limit U+10FFFF.
|
---|
301 | * The 0xF7 allows us to go to 0x1fffff (0x200000 would
|
---|
302 | * require five bytes). Not doing any further code points
|
---|
303 | * since that is not needed (and that would not be strict
|
---|
304 | * UTF-8, anyway). The "slow path" in Perl_is_utf8_char()
|
---|
305 | * will take care of the "extended UTF-8". */
|
---|
306 | #define IS_UTF8_CHAR_4c(p) \
|
---|
307 | ((p)[0] == 0xF4 && (p)[0] <= 0xF7 && \
|
---|
308 | (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
|
---|
309 | (p)[2] >= 0x80 && (p)[2] <= 0xBF && \
|
---|
310 | (p)[3] >= 0x80 && (p)[3] <= 0xBF)
|
---|
311 |
|
---|
312 | #define IS_UTF8_CHAR_3(p) \
|
---|
313 | (IS_UTF8_CHAR_3a(p) || \
|
---|
314 | IS_UTF8_CHAR_3b(p) || \
|
---|
315 | IS_UTF8_CHAR_3c(p) || \
|
---|
316 | IS_UTF8_CHAR_3d(p))
|
---|
317 | #define IS_UTF8_CHAR_4(p) \
|
---|
318 | (IS_UTF8_CHAR_4a(p) || \
|
---|
319 | IS_UTF8_CHAR_4b(p) || \
|
---|
320 | IS_UTF8_CHAR_4c(p))
|
---|
321 |
|
---|
322 | /* IS_UTF8_CHAR(p) is strictly speaking wrong (not UTF-8) because it
|
---|
323 | * (1) allows UTF-8 encoded UTF-16 surrogates
|
---|
324 | * (2) it allows code points past U+10FFFF.
|
---|
325 | * The Perl_is_utf8_char() full "slow" code will handle the Perl
|
---|
326 | * "extended UTF-8". */
|
---|
327 | #define IS_UTF8_CHAR(p, n) \
|
---|
328 | ((n) == 1 ? IS_UTF8_CHAR_1(p) : \
|
---|
329 | (n) == 2 ? IS_UTF8_CHAR_2(p) : \
|
---|
330 | (n) == 3 ? IS_UTF8_CHAR_3(p) : \
|
---|
331 | (n) == 4 ? IS_UTF8_CHAR_4(p) : 0)
|
---|
332 |
|
---|
333 | #define IS_UTF8_CHAR_FAST(n) ((n) <= 4)
|
---|
334 |
|
---|
335 | #endif /* IS_UTF8_CHAR() for UTF-8 */
|
---|