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a0ed51b3 LW |
1 | /* utf8.h |
2 | * | |
f3cb6f94 KW |
3 | * This file contains definitions for use with the UTF-8 encoding. It |
4 | * actually also works with the variant UTF-8 encoding called UTF-EBCDIC, and | |
5 | * hides almost all of the differences between these from the caller. In other | |
6 | * words, someone should #include this file, and if the code is being compiled | |
7 | * on an EBCDIC platform, things should mostly just work. | |
8 | * | |
2eee27d7 SS |
9 | * Copyright (C) 2000, 2001, 2002, 2005, 2006, 2007, 2009, |
10 | * 2010, 2011 by Larry Wall and others | |
a0ed51b3 LW |
11 | * |
12 | * You may distribute under the terms of either the GNU General Public | |
13 | * License or the Artistic License, as specified in the README file. | |
14 | * | |
15 | */ | |
16 | ||
57f0e7e2 KW |
17 | #ifndef H_UTF8 /* Guard against recursive inclusion */ |
18 | #define H_UTF8 1 | |
19 | ||
39e02b42 | 20 | /* Use UTF-8 as the default script encoding? |
1e54db1a | 21 | * Turning this on will break scripts having non-UTF-8 binary |
39e02b42 JH |
22 | * data (such as Latin-1) in string literals. */ |
23 | #ifdef USE_UTF8_SCRIPTS | |
24 | # define USE_UTF8_IN_NAMES (!IN_BYTES) | |
25 | #else | |
26 | # define USE_UTF8_IN_NAMES (PL_hints & HINT_UTF8) | |
27 | #endif | |
28 | ||
3cd96634 KW |
29 | #include "regcharclass.h" |
30 | #include "unicode_constants.h" | |
31 | ||
051a06d4 KW |
32 | /* For to_utf8_fold_flags, q.v. */ |
33 | #define FOLD_FLAGS_LOCALE 0x1 | |
34 | #define FOLD_FLAGS_FULL 0x2 | |
a0270393 | 35 | #define FOLD_FLAGS_NOMIX_ASCII 0x4 |
051a06d4 | 36 | |
83199d38 KW |
37 | /* For _core_swash_init(), internal core use only */ |
38 | #define _CORE_SWASH_INIT_USER_DEFINED_PROPERTY 0x1 | |
5d3d13d1 | 39 | #define _CORE_SWASH_INIT_RETURN_IF_UNDEF 0x2 |
87367d5f | 40 | #define _CORE_SWASH_INIT_ACCEPT_INVLIST 0x4 |
83199d38 | 41 | |
de69f3af KW |
42 | #define uvchr_to_utf8(a,b) uvchr_to_utf8_flags(a,b,0) |
43 | #define uvchr_to_utf8_flags(d,uv,flags) \ | |
44 | uvoffuni_to_utf8_flags(d,NATIVE_TO_UNI(uv),flags) | |
45 | #define utf8_to_uvchr_buf(s, e, lenp) \ | |
842991ae | 46 | utf8n_to_uvchr(s, (U8*)(e) - (U8*)(s), lenp, \ |
de69f3af KW |
47 | ckWARN_d(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY) |
48 | ||
a0270393 | 49 | #define to_uni_fold(c, p, lenp) _to_uni_fold_flags(c, p, lenp, FOLD_FLAGS_FULL) |
445bf929 KW |
50 | #define to_utf8_fold(c, p, lenp) _to_utf8_fold_flags(c, p, lenp, FOLD_FLAGS_FULL) |
51 | #define to_utf8_lower(a,b,c) _to_utf8_lower_flags(a,b,c,0) | |
52 | #define to_utf8_upper(a,b,c) _to_utf8_upper_flags(a,b,c,0) | |
53 | #define to_utf8_title(a,b,c) _to_utf8_title_flags(a,b,c,0) | |
36bb2ab6 | 54 | |
fd7cb289 | 55 | /* Source backward compatibility. */ |
fd7cb289 RGS |
56 | #define is_utf8_string_loc(s, len, ep) is_utf8_string_loclen(s, len, ep, 0) |
57 | ||
eda9cac1 KW |
58 | #define foldEQ_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2) \ |
59 | foldEQ_utf8_flags(s1, pe1, l1, u1, s2, pe2, l2, u2, 0) | |
baa60164 | 60 | #define FOLDEQ_UTF8_NOMIX_ASCII (1 << 0) |
cea315b6 | 61 | #define FOLDEQ_LOCALE (1 << 1) |
18f762c3 KW |
62 | #define FOLDEQ_S1_ALREADY_FOLDED (1 << 2) |
63 | #define FOLDEQ_S2_ALREADY_FOLDED (1 << 3) | |
a33c29bc | 64 | |
e6226b18 KW |
65 | /* |
66 | =for apidoc ibcmp_utf8 | |
67 | ||
68 | This is a synonym for (! foldEQ_utf8()) | |
69 | ||
70 | =cut | |
71 | */ | |
72 | #define ibcmp_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2) \ | |
73 | cBOOL(! foldEQ_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2)) | |
74 | ||
1d72bdf6 NIS |
75 | #ifdef EBCDIC |
76 | /* The equivalent of these macros but implementing UTF-EBCDIC | |
77 | are in the following header file: | |
78 | */ | |
79 | ||
80 | #include "utfebcdic.h" | |
fd7cb289 | 81 | |
d06134e5 | 82 | #else /* ! EBCDIC */ |
73c4f7a1 GS |
83 | START_EXTERN_C |
84 | ||
a0ed51b3 | 85 | #ifdef DOINIT |
6f06b55f | 86 | EXTCONST unsigned char PL_utf8skip[] = { |
b2635aa8 KW |
87 | /* 0x00 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */ |
88 | /* 0x10 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */ | |
89 | /* 0x20 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */ | |
90 | /* 0x30 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */ | |
91 | /* 0x40 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */ | |
92 | /* 0x50 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */ | |
93 | /* 0x60 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */ | |
94 | /* 0x70 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */ | |
95 | /* 0x80 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */ | |
96 | /* 0x90 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */ | |
97 | /* 0xA0 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */ | |
98 | /* 0xB0 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */ | |
99 | /* 0xC0 */ 2,2, /* overlong */ | |
100 | /* 0xC2 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* U+0080 to U+03FF */ | |
101 | /* 0xD0 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* U+0400 to U+07FF */ | |
102 | /* 0xE0 */ 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, /* U+0800 to U+FFFF */ | |
103 | /* 0xF0 */ 4,4,4,4,4,4,4,4,5,5,5,5,6,6, /* above BMP to 2**31 - 1 */ | |
104 | /* 0xFE */ 7,13, /* Perl extended (never was official UTF-8). Up to 72bit | |
105 | allowed (64-bit + reserved). */ | |
a0ed51b3 LW |
106 | }; |
107 | #else | |
6f06b55f | 108 | EXTCONST unsigned char PL_utf8skip[]; |
a0ed51b3 LW |
109 | #endif |
110 | ||
73c4f7a1 | 111 | END_EXTERN_C |
7e2040f0 | 112 | |
59a449d5 KW |
113 | /* Native character to/from iso-8859-1. Are the identity functions on ASCII |
114 | * platforms */ | |
115 | #define NATIVE_TO_LATIN1(ch) (ch) | |
116 | #define LATIN1_TO_NATIVE(ch) (ch) | |
117 | ||
118 | /* I8 is an intermediate version of UTF-8 used only in UTF-EBCDIC. We thus | |
119 | * consider it to be identical to UTF-8 on ASCII platforms. Strictly speaking | |
120 | * UTF-8 and UTF-EBCDIC are two different things, but we often conflate them | |
121 | * because they are 8-bit encodings that serve the same purpose in Perl, and | |
122 | * rarely do we need to distinguish them. The term "NATIVE_UTF8" applies to | |
123 | * whichever one is applicable on the current platform */ | |
124 | #define NATIVE_UTF8_TO_I8(ch) (ch) | |
125 | #define I8_TO_NATIVE_UTF8(ch) (ch) | |
126 | ||
1d72bdf6 NIS |
127 | /* Transforms in wide UV chars */ |
128 | #define UNI_TO_NATIVE(ch) (ch) | |
129 | #define NATIVE_TO_UNI(ch) (ch) | |
d7578b48 | 130 | |
877d9f0d | 131 | /* |
9041c2e3 | 132 | |
8c007b5a | 133 | The following table is from Unicode 3.2. |
877d9f0d JH |
134 | |
135 | Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte | |
136 | ||
375122d7 | 137 | U+0000..U+007F 00..7F |
e1b711da | 138 | U+0080..U+07FF * C2..DF 80..BF |
37e2e78e | 139 | U+0800..U+0FFF E0 * A0..BF 80..BF |
375122d7 | 140 | U+1000..U+CFFF E1..EC 80..BF 80..BF |
e1b711da | 141 | U+D000..U+D7FF ED 80..9F 80..BF |
537124e4 | 142 | U+D800..U+DFFF ED A0..BF 80..BF (surrogates) |
375122d7 | 143 | U+E000..U+FFFF EE..EF 80..BF 80..BF |
37e2e78e | 144 | U+10000..U+3FFFF F0 * 90..BF 80..BF 80..BF |
877d9f0d JH |
145 | U+40000..U+FFFFF F1..F3 80..BF 80..BF 80..BF |
146 | U+100000..U+10FFFF F4 80..8F 80..BF 80..BF | |
b2635aa8 KW |
147 | Below are non-Unicode code points |
148 | U+110000..U+13FFFF F4 90..BF 80..BF 80..BF | |
149 | U+110000..U+1FFFFF F5..F7 80..BF 80..BF 80..BF | |
537124e4 | 150 | U+200000..: F8.. * 88..BF 80..BF 80..BF 80..BF |
877d9f0d | 151 | |
e1b711da | 152 | Note the gaps before several of the byte entries above marked by '*'. These are |
37e2e78e KW |
153 | caused by legal UTF-8 avoiding non-shortest encodings: it is technically |
154 | possible to UTF-8-encode a single code point in different ways, but that is | |
155 | explicitly forbidden, and the shortest possible encoding should always be used | |
15824458 | 156 | (and that is what Perl does). The non-shortest ones are called 'overlongs'. |
8c007b5a | 157 | |
877d9f0d JH |
158 | */ |
159 | ||
8c007b5a JH |
160 | /* |
161 | Another way to look at it, as bits: | |
162 | ||
b2635aa8 | 163 | Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte |
8c007b5a | 164 | |
b2635aa8 KW |
165 | 0aaa aaaa 0aaa aaaa |
166 | 0000 0bbb bbaa aaaa 110b bbbb 10aa aaaa | |
167 | cccc bbbb bbaa aaaa 1110 cccc 10bb bbbb 10aa aaaa | |
168 | 00 000d ddcc cccc bbbb bbaa aaaa 1111 0ddd 10cc cccc 10bb bbbb 10aa aaaa | |
8c007b5a JH |
169 | |
170 | As you can see, the continuation bytes all begin with C<10>, and the | |
e1b711da | 171 | leading bits of the start byte tell how many bytes there are in the |
8c007b5a JH |
172 | encoded character. |
173 | ||
65ab9279 TC |
174 | Perl's extended UTF-8 means we can have start bytes up to FF. |
175 | ||
8c007b5a JH |
176 | */ |
177 | ||
15824458 KW |
178 | /* Is the representation of the Unicode code point 'c' the same regardless of |
179 | * being encoded in UTF-8 or not? */ | |
c4d5f83a | 180 | #define UNI_IS_INVARIANT(c) (((UV)c) < 0x80) |
15824458 KW |
181 | |
182 | /* Is the UTF8-encoded byte 'c' part of a variant sequence in UTF-8? This is | |
183 | * the inverse of UTF8_IS_INVARIANT */ | |
184 | #define UTF8_IS_CONTINUED(c) (((U8)c) & 0x80) | |
185 | ||
186 | /* Is the byte 'c' the first byte of a multi-byte UTF8-8 encoded sequence? | |
187 | * This doesn't catch invariants (they are single-byte). It also excludes the | |
188 | * illegal overlong sequences that begin with C0 and C1. */ | |
0447e8df | 189 | #define UTF8_IS_START(c) (((U8)c) >= 0xc2) |
15824458 KW |
190 | |
191 | /* Is the byte 'c' part of a multi-byte UTF8-8 encoded sequence, and not the | |
192 | * first byte thereof? */ | |
e021c6e6 | 193 | #define UTF8_IS_CONTINUATION(c) ((((U8)c) & 0xC0) == 0x80) |
0ae1fa71 | 194 | |
15824458 KW |
195 | /* Is the UTF8-encoded byte 'c' the first byte of a two byte sequence? Use |
196 | * UTF8_IS_NEXT_CHAR_DOWNGRADEABLE() instead if the input isn't known to | |
197 | * be well-formed. Masking with 0xfe allows the low bit to be 0 or 1; thus | |
198 | * this matches 0xc[23]. */ | |
559c7f10 | 199 | #define UTF8_IS_DOWNGRADEABLE_START(c) (((U8)(c) & 0xfe) == 0xc2) |
4ab10950 | 200 | |
15824458 KW |
201 | /* Is the UTF8-encoded byte 'c' the first byte of a sequence of bytes that |
202 | * represent a code point > 255? */ | |
7b4252f4 | 203 | #define UTF8_IS_ABOVE_LATIN1(c) ((U8)(c) >= 0xc4) |
8850bf83 | 204 | |
15824458 KW |
205 | /* This defines the 1-bits that are to be in the first byte of a multi-byte |
206 | * UTF-8 encoded character that give the number of bytes that comprise the | |
f710bf0c | 207 | * character. 'len' is the number of bytes in the multi-byte sequence. */ |
ee372ee9 | 208 | #define UTF_START_MARK(len) (((len) > 7) ? 0xFF : (0xFF & (0xFE << (7-(len))))) |
b2635aa8 KW |
209 | |
210 | /* Masks out the initial one bits in a start byte, leaving the real data ones. | |
f710bf0c KW |
211 | * Doesn't work on an invariant byte. 'len' is the number of bytes in the |
212 | * multi-byte sequence that comprises the character. */ | |
22901f30 | 213 | #define UTF_START_MASK(len) (((len) >= 7) ? 0x00 : (0x1F >> ((len)-2))) |
1d72bdf6 | 214 | |
15824458 KW |
215 | /* This defines the bits that are to be in the continuation bytes of a multi-byte |
216 | * UTF-8 encoded character that indicate it is a continuation byte. */ | |
1d72bdf6 | 217 | #define UTF_CONTINUATION_MARK 0x80 |
15824458 KW |
218 | |
219 | /* This is the number of low-order bits a continuation byte in a UTF-8 encoded | |
220 | * sequence contributes to the specification of the code point. In the bit | |
221 | * maps above, you see that the first 2 bits are a constant '10', leaving 6 of | |
222 | * real information */ | |
1d72bdf6 | 223 | #define UTF_ACCUMULATION_SHIFT 6 |
b2635aa8 KW |
224 | |
225 | /* 2**UTF_ACCUMULATION_SHIFT - 1 */ | |
1d72bdf6 | 226 | #define UTF_CONTINUATION_MASK ((U8)0x3f) |
c512ce4f | 227 | |
15824458 KW |
228 | /* If a value is anded with this, and the result is non-zero, then using the |
229 | * original value in UTF8_ACCUMULATE will overflow, shifting bits off the left | |
230 | * */ | |
eb83ed87 | 231 | #define UTF_ACCUMULATION_OVERFLOW_MASK \ |
bb88be5f KW |
232 | (((UV) UTF_CONTINUATION_MASK) << ((sizeof(UV) * CHARBITS) \ |
233 | - UTF_ACCUMULATION_SHIFT)) | |
eb83ed87 | 234 | |
6588300d NC |
235 | #if UVSIZE >= 8 |
236 | # define UTF8_QUAD_MAX UINT64_C(0x1000000000) | |
237 | ||
5aaebcb3 KW |
238 | /* Input is a true Unicode (not-native) code point */ |
239 | #define OFFUNISKIP(uv) ( (uv) < 0x80 ? 1 : \ | |
1d68d6cd SC |
240 | (uv) < 0x800 ? 2 : \ |
241 | (uv) < 0x10000 ? 3 : \ | |
242 | (uv) < 0x200000 ? 4 : \ | |
243 | (uv) < 0x4000000 ? 5 : \ | |
244 | (uv) < 0x80000000 ? 6 : \ | |
9041c2e3 | 245 | (uv) < UTF8_QUAD_MAX ? 7 : 13 ) |
1d68d6cd SC |
246 | #else |
247 | /* No, I'm not even going to *TRY* putting #ifdef inside a #define */ | |
5aaebcb3 | 248 | #define OFFUNISKIP(uv) ( (uv) < 0x80 ? 1 : \ |
1d68d6cd SC |
249 | (uv) < 0x800 ? 2 : \ |
250 | (uv) < 0x10000 ? 3 : \ | |
251 | (uv) < 0x200000 ? 4 : \ | |
252 | (uv) < 0x4000000 ? 5 : \ | |
253 | (uv) < 0x80000000 ? 6 : 7 ) | |
254 | #endif | |
255 | ||
03c76984 KW |
256 | /* How wide can a single UTF-8 encoded character become in bytes. */ |
257 | /* NOTE: Strictly speaking Perl's UTF-8 should not be called UTF-8 since UTF-8 | |
258 | * is an encoding of Unicode, and Unicode's upper limit, 0x10FFFF, can be | |
259 | * expressed with 4 bytes. However, Perl thinks of UTF-8 as a way to encode | |
260 | * non-negative integers in a binary format, even those above Unicode */ | |
261 | #define UTF8_MAXBYTES 13 | |
262 | ||
263 | /* The maximum number of UTF-8 bytes a single Unicode character can | |
264 | * uppercase/lowercase/fold into. Unicode guarantees that the maximum | |
265 | * expansion is 3 characters. On ASCIIish platforms, the highest Unicode | |
266 | * character occupies 4 bytes, therefore this number would be 12, but this is | |
267 | * smaller than the maximum width a single above-Unicode character can occupy, | |
268 | * so use that instead */ | |
269 | #if UTF8_MAXBYTES < 12 | |
270 | #error UTF8_MAXBYTES must be at least 12 | |
271 | #endif | |
272 | ||
843a4590 KW |
273 | #define MAX_UTF8_TWO_BYTE 0x7FF |
274 | ||
03c76984 KW |
275 | #define UTF8_MAXBYTES_CASE UTF8_MAXBYTES |
276 | ||
d06134e5 KW |
277 | #endif /* EBCDIC vs ASCII */ |
278 | ||
279 | /* Rest of these are attributes of Unicode and perl's internals rather than the | |
280 | * encoding, or happen to be the same in both ASCII and EBCDIC (at least at | |
281 | * this level; the macros that some of these call may have different | |
282 | * definitions in the two encodings */ | |
283 | ||
59a449d5 KW |
284 | /* In domain restricted to ASCII, these may make more sense to the reader than |
285 | * the ones with Latin1 in the name */ | |
286 | #define NATIVE_TO_ASCII(ch) NATIVE_TO_LATIN1(ch) | |
287 | #define ASCII_TO_NATIVE(ch) LATIN1_TO_NATIVE(ch) | |
288 | ||
289 | /* More or less misleadingly-named defines, retained for back compat */ | |
290 | #define NATIVE_TO_UTF(ch) NATIVE_UTF8_TO_I8(ch) | |
291 | #define NATIVE_TO_I8(ch) NATIVE_UTF8_TO_I8(ch) | |
292 | #define UTF_TO_NATIVE(ch) I8_TO_NATIVE_UTF8(ch) | |
293 | #define I8_TO_NATIVE(ch) I8_TO_NATIVE_UTF8(ch) | |
294 | #define NATIVE8_TO_UNI(ch) NATIVE_TO_LATIN1(ch) | |
d06134e5 | 295 | |
537124e4 KW |
296 | /* Adds a UTF8 continuation byte 'new' of information to a running total code |
297 | * point 'old' of all the continuation bytes so far. This is designed to be | |
155d2738 KW |
298 | * used in a loop to convert from UTF-8 to the code point represented. Note |
299 | * that this is asymmetric on EBCDIC platforms, in that the 'new' parameter is | |
300 | * the UTF-EBCDIC byte, whereas the 'old' parameter is a Unicode (not EBCDIC) | |
301 | * code point in process of being generated */ | |
302 | #define UTF8_ACCUMULATE(old, new) (((old) << UTF_ACCUMULATION_SHIFT) \ | |
303 | | ((NATIVE_UTF8_TO_I8((U8)new)) \ | |
304 | & UTF_CONTINUATION_MASK)) | |
d06134e5 | 305 | |
4ab10950 KW |
306 | /* This works in the face of malformed UTF-8. */ |
307 | #define UTF8_IS_NEXT_CHAR_DOWNGRADEABLE(s, e) (UTF8_IS_DOWNGRADEABLE_START(*s) \ | |
308 | && ( (e) - (s) > 1) \ | |
309 | && UTF8_IS_CONTINUATION(*((s)+1))) | |
310 | ||
5aaebcb3 KW |
311 | /* Number of bytes a code point occupies in UTF-8. */ |
312 | #define NATIVE_SKIP(uv) OFFUNISKIP(NATIVE_TO_UNI(uv)) | |
313 | ||
314 | /* Most code which says UNISKIP is really thinking in terms of native code | |
315 | * points (0-255) plus all those beyond. This is an imprecise term, but having | |
316 | * it means existing code continues to work. For precision, use NATIVE_SKIP | |
317 | * and OFFUNISKIP */ | |
318 | #define UNISKIP(uv) NATIVE_SKIP(uv) | |
319 | ||
94bb8c36 | 320 | /* Convert a two (not one) byte utf8 character to a native code point value. |
2950f2a7 KW |
321 | * Needs just one iteration of accumulate. Should not be used unless it is |
322 | * known that the two bytes are legal: 1) two-byte start, and 2) continuation. | |
323 | * Note that the result can be larger than 255 if the input character is not | |
324 | * downgradable */ | |
94bb8c36 KW |
325 | #define TWO_BYTE_UTF8_TO_NATIVE(HI, LO) \ |
326 | UNI_TO_NATIVE(UTF8_ACCUMULATE((NATIVE_UTF8_TO_I8(HI) & UTF_START_MASK(2)), \ | |
155d2738 | 327 | (LO))) |
94bb8c36 KW |
328 | |
329 | /* Should never be used, and be deprecated */ | |
330 | #define TWO_BYTE_UTF8_TO_UNI(HI, LO) NATIVE_TO_UNI(TWO_BYTE_UTF8_TO_NATIVE(HI, LO)) | |
2950f2a7 | 331 | |
15824458 KW |
332 | /* How many bytes in the UTF-8 encoded character whose first (perhaps only) |
333 | * byte is pointed to by 's' */ | |
d06134e5 KW |
334 | #define UTF8SKIP(s) PL_utf8skip[*(const U8*)(s)] |
335 | ||
15824458 KW |
336 | /* Is the byte 'c' the same character when encoded in UTF-8 as when not. This |
337 | * works on both UTF-8 encoded strings and non-encoded, as it returns TRUE in | |
338 | * each for the exact same set of bit patterns. (And it works on any byte in a | |
339 | * UTF-8 encoded string) */ | |
bc3632a8 | 340 | #define UTF8_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE_UTF8_TO_I8(c)) |
15824458 | 341 | |
6f2d5cbc KW |
342 | /* Like the above, but its name implies a non-UTF8 input, and is implemented |
343 | * differently (for no particular reason) */ | |
344 | #define NATIVE_BYTE_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE_TO_LATIN1(c)) | |
345 | ||
346 | /* Like the above, but accepts any UV as input */ | |
347 | #define UVCHR_IS_INVARIANT(uv) UNI_IS_INVARIANT(NATIVE_TO_UNI(uv)) | |
d06134e5 KW |
348 | |
349 | #define MAX_PORTABLE_UTF8_TWO_BYTE 0x3FF /* constrained by EBCDIC */ | |
350 | ||
48ccf5e1 KW |
351 | /* The macros in the next 4 sets are used to generate the two utf8 or utfebcdic |
352 | * bytes from an ordinal that is known to fit into exactly two (not one) bytes; | |
353 | * it must be less than 0x3FF to work across both encodings. */ | |
354 | ||
355 | /* These two are helper macros for the other three sets, and should not be used | |
356 | * directly anywhere else. 'translate_function' is either NATIVE_TO_LATIN1 | |
357 | * (which works for code points up to 0xFF) or NATIVE_TO_UNI which works for any | |
358 | * code point */ | |
359 | #define __BASE_TWO_BYTE_HI(c, translate_function) \ | |
360 | I8_TO_NATIVE_UTF8((translate_function(c) >> UTF_ACCUMULATION_SHIFT) \ | |
361 | | UTF_START_MARK(2)) | |
362 | #define __BASE_TWO_BYTE_LO(c, translate_function) \ | |
363 | I8_TO_NATIVE_UTF8((translate_function(c) & UTF_CONTINUATION_MASK) \ | |
364 | | UTF_CONTINUATION_MARK) | |
365 | ||
48ccf5e1 KW |
366 | /* The next two macros should not be used. They were designed to be usable as |
367 | * the case label of a switch statement, but this doesn't work for EBCDIC. Use | |
9d0d3a03 | 368 | * regen/unicode_constants.pl instead */ |
48ccf5e1 KW |
369 | #define UTF8_TWO_BYTE_HI_nocast(c) __BASE_TWO_BYTE_HI(c, NATIVE_TO_UNI) |
370 | #define UTF8_TWO_BYTE_LO_nocast(c) __BASE_TWO_BYTE_LO(c, NATIVE_TO_UNI) | |
371 | ||
372 | /* The next two macros are used when the source should be a single byte | |
373 | * character; checked for under DEBUGGING */ | |
374 | #define UTF8_EIGHT_BIT_HI(c) (__ASSERT_(FITS_IN_8_BITS(c)) \ | |
375 | ((U8) __BASE_TWO_BYTE_HI(c, NATIVE_TO_LATIN1))) | |
376 | #define UTF8_EIGHT_BIT_LO(c) (__ASSERT_(FITS_IN_8_BITS(c)) \ | |
377 | ((U8) __BASE_TWO_BYTE_LO(c, NATIVE_TO_LATIN1))) | |
378 | ||
379 | /* These final two macros in the series are used when the source can be any | |
380 | * code point whose UTF-8 is known to occupy 2 bytes; they are less efficient | |
381 | * than the EIGHT_BIT versions on EBCDIC platforms. We use the logical '~' | |
382 | * operator instead of "<=" to avoid getting compiler warnings. | |
383 | * MAX_PORTABLE_UTF8_TWO_BYTE should be exactly all one bits in the lower few | |
384 | * places, so the ~ works */ | |
385 | #define UTF8_TWO_BYTE_HI(c) \ | |
386 | (__ASSERT_((sizeof(c) == 1) \ | |
387 | || !(((WIDEST_UTYPE)(c)) & ~MAX_PORTABLE_UTF8_TWO_BYTE)) \ | |
388 | ((U8) __BASE_TWO_BYTE_HI(c, NATIVE_TO_LATIN1))) | |
389 | #define UTF8_TWO_BYTE_LO(c) \ | |
390 | (__ASSERT_((sizeof(c) == 1) \ | |
391 | || !(((WIDEST_UTYPE)(c)) & ~MAX_PORTABLE_UTF8_TWO_BYTE)) \ | |
392 | ((U8) __BASE_TWO_BYTE_LO(c, NATIVE_TO_LATIN1))) | |
d06134e5 | 393 | |
e7214ce8 KW |
394 | /* This is illegal in any well-formed UTF-8 in both EBCDIC and ASCII |
395 | * as it is only in overlongs. */ | |
396 | #define ILLEGAL_UTF8_BYTE I8_TO_NATIVE_UTF8(0xC1) | |
397 | ||
7e2040f0 | 398 | /* |
e3036cf4 | 399 | * 'UTF' is whether or not p is encoded in UTF8. The names 'foo_lazy_if' stem |
20df05f4 KW |
400 | * from an earlier version of these macros in which they didn't call the |
401 | * foo_utf8() macros (i.e. were 'lazy') unless they decided that *p is the | |
402 | * beginning of a utf8 character. Now that foo_utf8() determines that itself, | |
403 | * no need to do it again here | |
7e2040f0 | 404 | */ |
e3036cf4 KW |
405 | #define isIDFIRST_lazy_if(p,UTF) ((IN_BYTES || !UTF ) \ |
406 | ? isIDFIRST(*(p)) \ | |
407 | : isIDFIRST_utf8((const U8*)p)) | |
32636478 KW |
408 | #define isWORDCHAR_lazy_if(p,UTF) ((IN_BYTES || (!UTF )) \ |
409 | ? isWORDCHAR(*(p)) \ | |
410 | : isWORDCHAR_utf8((const U8*)p)) | |
411 | #define isALNUM_lazy_if(p,UTF) isWORDCHAR_lazy_if(p,UTF) | |
1d72bdf6 | 412 | |
89ebb4a3 JH |
413 | #define UTF8_MAXLEN UTF8_MAXBYTES |
414 | ||
8cb75cc8 KW |
415 | /* A Unicode character can fold to up to 3 characters */ |
416 | #define UTF8_MAX_FOLD_CHAR_EXPAND 3 | |
417 | ||
a98fe34d | 418 | #define IN_BYTES (CopHINTS_get(PL_curcop) & HINT_BYTES) |
0064a8a9 | 419 | #define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTES) |
66cbab2c | 420 | #define IN_UNI_8_BIT \ |
b36bf33f KW |
421 | (CopHINTS_get(PL_curcop) & (HINT_UNI_8_BIT|HINT_LOCALE_NOT_CHARS) \ |
422 | && ! IN_LOCALE_RUNTIME && ! IN_BYTES) | |
423 | ||
1d72bdf6 | 424 | |
c76687c5 KW |
425 | #define UTF8_ALLOW_EMPTY 0x0001 /* Allow a zero length string */ |
426 | ||
427 | /* Allow first byte to be a continuation byte */ | |
1d72bdf6 | 428 | #define UTF8_ALLOW_CONTINUATION 0x0002 |
c76687c5 KW |
429 | |
430 | /* Allow second... bytes to be non-continuation bytes */ | |
1d72bdf6 | 431 | #define UTF8_ALLOW_NON_CONTINUATION 0x0004 |
949cf498 KW |
432 | |
433 | /* expecting more bytes than were available in the string */ | |
434 | #define UTF8_ALLOW_SHORT 0x0008 | |
435 | ||
436 | /* Overlong sequence; i.e., the code point can be specified in fewer bytes. */ | |
437 | #define UTF8_ALLOW_LONG 0x0010 | |
438 | ||
439 | #define UTF8_DISALLOW_SURROGATE 0x0020 /* Unicode surrogates */ | |
440 | #define UTF8_WARN_SURROGATE 0x0040 | |
441 | ||
442 | #define UTF8_DISALLOW_NONCHAR 0x0080 /* Unicode non-character */ | |
443 | #define UTF8_WARN_NONCHAR 0x0100 /* code points */ | |
444 | ||
445 | #define UTF8_DISALLOW_SUPER 0x0200 /* Super-set of Unicode: code */ | |
446 | #define UTF8_WARN_SUPER 0x0400 /* points above the legal max */ | |
447 | ||
448 | /* Code points which never were part of the original UTF-8 standard, the first | |
ea5ced44 KW |
449 | * byte of which is a FE or FF on ASCII platforms. If the first byte is FF, it |
450 | * will overflow a 32-bit word. If the first byte is FE, it will overflow a | |
451 | * signed 32-bit word. */ | |
949cf498 KW |
452 | #define UTF8_DISALLOW_FE_FF 0x0800 |
453 | #define UTF8_WARN_FE_FF 0x1000 | |
454 | ||
455 | #define UTF8_CHECK_ONLY 0x2000 | |
456 | ||
457 | /* For backwards source compatibility. They do nothing, as the default now | |
458 | * includes what they used to mean. The first one's meaning was to allow the | |
459 | * just the single non-character 0xFFFF */ | |
460 | #define UTF8_ALLOW_FFFF 0 | |
461 | #define UTF8_ALLOW_SURROGATE 0 | |
462 | ||
33d9abfb | 463 | #define UTF8_DISALLOW_ILLEGAL_INTERCHANGE (UTF8_DISALLOW_SUPER|UTF8_DISALLOW_NONCHAR|UTF8_DISALLOW_SURROGATE|UTF8_DISALLOW_FE_FF) |
949cf498 | 464 | #define UTF8_WARN_ILLEGAL_INTERCHANGE \ |
33d9abfb | 465 | (UTF8_WARN_SUPER|UTF8_WARN_NONCHAR|UTF8_WARN_SURROGATE|UTF8_WARN_FE_FF) |
949cf498 KW |
466 | #define UTF8_ALLOW_ANY \ |
467 | (~(UTF8_DISALLOW_ILLEGAL_INTERCHANGE|UTF8_WARN_ILLEGAL_INTERCHANGE)) | |
468 | #define UTF8_ALLOW_ANYUV \ | |
469 | (UTF8_ALLOW_EMPTY \ | |
470 | & ~(UTF8_DISALLOW_ILLEGAL_INTERCHANGE|UTF8_WARN_ILLEGAL_INTERCHANGE)) | |
9f7f3913 TS |
471 | #define UTF8_ALLOW_DEFAULT (ckWARN(WARN_UTF8) ? 0 : \ |
472 | UTF8_ALLOW_ANYUV) | |
1d72bdf6 | 473 | |
7131f24d KW |
474 | /* Surrogates, non-character code points and above-Unicode code points are |
475 | * problematic in some contexts. This allows code that needs to check for | |
476 | * those to to quickly exclude the vast majority of code points it will | |
477 | * encounter */ | |
b96a92fb KW |
478 | #define UTF8_FIRST_PROBLEMATIC_CODE_POINT_FIRST_BYTE \ |
479 | FIRST_SURROGATE_UTF8_FIRST_BYTE | |
7131f24d | 480 | |
b96a92fb KW |
481 | #define UTF8_IS_SURROGATE(s) cBOOL(is_SURROGATE_utf8(s)) |
482 | #define UTF8_IS_REPLACEMENT(s, send) cBOOL(is_REPLACEMENT_utf8_safe(s,send)) | |
7131f24d KW |
483 | |
484 | /* ASCII EBCDIC I8 | |
485 | * U+10FFFF: \xF4\x8F\xBF\xBF \xF9\xA1\xBF\xBF\xBF max legal Unicode | |
486 | * U+110000: \xF4\x90\x80\x80 \xF9\xA2\xA0\xA0\xA0 | |
487 | * U+110001: \xF4\x90\x80\x81 \xF9\xA2\xA0\xA0\xA1 | |
488 | */ | |
489 | #ifdef EBCDIC /* Both versions assume well-formed UTF8 */ | |
bc3632a8 KW |
490 | # define UTF8_IS_SUPER(s) (NATIVE_UTF8_TO_I8(* (U8*) (s)) >= 0xF9 \ |
491 | && (NATIVE_UTF8_TO_I8(* (U8*) (s)) > 0xF9 \ | |
a3481822 | 492 | || (NATIVE_UTF8_TO_I8(* ((U8*) (s) + 1)) >= 0xA2))) |
7131f24d | 493 | #else |
0404c92a KW |
494 | # define UTF8_IS_SUPER(s) (*(U8*) (s) >= 0xF4 \ |
495 | && (*(U8*) (s) > 0xF4 || (*((U8*) (s) + 1) >= 0x90))) | |
7131f24d KW |
496 | #endif |
497 | ||
b96a92fb KW |
498 | /* These are now machine generated, and the 'given' clause is no longer |
499 | * applicable */ | |
500 | #define UTF8_IS_NONCHAR_GIVEN_THAT_NON_SUPER_AND_GE_PROBLEMATIC(s) \ | |
501 | cBOOL(is_NONCHAR_utf8(s)) | |
502 | #define UTF8_IS_NONCHAR_(s) \ | |
503 | UTF8_IS_NONCHAR_GIVEN_THAT_NON_SUPER_AND_GE_PROBLEMATIC(s) | |
7131f24d | 504 | |
c867b360 JH |
505 | #define UNICODE_SURROGATE_FIRST 0xD800 |
506 | #define UNICODE_SURROGATE_LAST 0xDFFF | |
507 | #define UNICODE_REPLACEMENT 0xFFFD | |
508 | #define UNICODE_BYTE_ORDER_MARK 0xFEFF | |
1d72bdf6 | 509 | |
b851fbc1 | 510 | /* Though our UTF-8 encoding can go beyond this, |
c76687c5 | 511 | * let's be conservative and do as Unicode says. */ |
b851fbc1 JH |
512 | #define PERL_UNICODE_MAX 0x10FFFF |
513 | ||
949cf498 KW |
514 | #define UNICODE_WARN_SURROGATE 0x0001 /* UTF-16 surrogates */ |
515 | #define UNICODE_WARN_NONCHAR 0x0002 /* Non-char code points */ | |
516 | #define UNICODE_WARN_SUPER 0x0004 /* Above 0x10FFFF */ | |
517 | #define UNICODE_WARN_FE_FF 0x0008 /* Above 0x10FFFF */ | |
518 | #define UNICODE_DISALLOW_SURROGATE 0x0010 | |
519 | #define UNICODE_DISALLOW_NONCHAR 0x0020 | |
520 | #define UNICODE_DISALLOW_SUPER 0x0040 | |
521 | #define UNICODE_DISALLOW_FE_FF 0x0080 | |
bb88be5f KW |
522 | #define UNICODE_WARN_ILLEGAL_INTERCHANGE \ |
523 | (UNICODE_WARN_SURROGATE|UNICODE_WARN_NONCHAR|UNICODE_WARN_SUPER) | |
524 | #define UNICODE_DISALLOW_ILLEGAL_INTERCHANGE \ | |
525 | (UNICODE_DISALLOW_SURROGATE|UNICODE_DISALLOW_NONCHAR|UNICODE_DISALLOW_SUPER) | |
949cf498 KW |
526 | |
527 | /* For backward source compatibility, as are now the default */ | |
528 | #define UNICODE_ALLOW_SURROGATE 0 | |
529 | #define UNICODE_ALLOW_SUPER 0 | |
530 | #define UNICODE_ALLOW_ANY 0 | |
b851fbc1 | 531 | |
1d72bdf6 NIS |
532 | #define UNICODE_IS_SURROGATE(c) ((c) >= UNICODE_SURROGATE_FIRST && \ |
533 | (c) <= UNICODE_SURROGATE_LAST) | |
a10ec373 | 534 | #define UNICODE_IS_REPLACEMENT(c) ((c) == UNICODE_REPLACEMENT) |
872c91ae | 535 | #define UNICODE_IS_BYTE_ORDER_MARK(c) ((c) == UNICODE_BYTE_ORDER_MARK) |
7131f24d KW |
536 | #define UNICODE_IS_NONCHAR(c) ((c >= 0xFDD0 && c <= 0xFDEF) \ |
537 | /* The other noncharacters end in FFFE or FFFF, which \ | |
538 | * the mask below catches both of, but beyond the last \ | |
539 | * official unicode code point, they aren't \ | |
540 | * noncharacters, since those aren't Unicode \ | |
541 | * characters at all */ \ | |
542 | || ((((c & 0xFFFE) == 0xFFFE)) && ! UNICODE_IS_SUPER(c))) | |
543 | #define UNICODE_IS_SUPER(c) ((c) > PERL_UNICODE_MAX) | |
544 | #define UNICODE_IS_FE_FF(c) ((c) > 0x7FFFFFFF) | |
1d72bdf6 | 545 | |
ec34087a KW |
546 | #define LATIN_SMALL_LETTER_SHARP_S LATIN_SMALL_LETTER_SHARP_S_NATIVE |
547 | #define LATIN_SMALL_LETTER_Y_WITH_DIAERESIS \ | |
548 | LATIN_SMALL_LETTER_Y_WITH_DIAERESIS_NATIVE | |
549 | #define MICRO_SIGN MICRO_SIGN_NATIVE | |
550 | #define LATIN_CAPITAL_LETTER_A_WITH_RING_ABOVE \ | |
551 | LATIN_CAPITAL_LETTER_A_WITH_RING_ABOVE_NATIVE | |
552 | #define LATIN_SMALL_LETTER_A_WITH_RING_ABOVE \ | |
553 | LATIN_SMALL_LETTER_A_WITH_RING_ABOVE_NATIVE | |
09091399 JH |
554 | #define UNICODE_GREEK_CAPITAL_LETTER_SIGMA 0x03A3 |
555 | #define UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA 0x03C2 | |
556 | #define UNICODE_GREEK_SMALL_LETTER_SIGMA 0x03C3 | |
9dcbe121 | 557 | #define GREEK_SMALL_LETTER_MU 0x03BC |
9e682c18 KW |
558 | #define GREEK_CAPITAL_LETTER_MU 0x039C /* Upper and title case |
559 | of MICRON */ | |
560 | #define LATIN_CAPITAL_LETTER_Y_WITH_DIAERESIS 0x0178 /* Also is title case */ | |
561 | #define LATIN_CAPITAL_LETTER_SHARP_S 0x1E9E | |
562 | #define LATIN_SMALL_LETTER_LONG_S 0x017F | |
a9f50d33 KW |
563 | #define LATIN_SMALL_LIGATURE_LONG_S_T 0xFB05 |
564 | #define LATIN_SMALL_LIGATURE_ST 0xFB06 | |
9e682c18 KW |
565 | #define KELVIN_SIGN 0x212A |
566 | #define ANGSTROM_SIGN 0x212B | |
09091399 | 567 | |
9e55ce06 | 568 | #define UNI_DISPLAY_ISPRINT 0x0001 |
c728cb41 JH |
569 | #define UNI_DISPLAY_BACKSLASH 0x0002 |
570 | #define UNI_DISPLAY_QQ (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH) | |
571 | #define UNI_DISPLAY_REGEX (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH) | |
9e55ce06 | 572 | |
5cd46e1f KW |
573 | #define ANYOF_FOLD_SHARP_S(node, input, end) \ |
574 | (ANYOF_BITMAP_TEST(node, LATIN_SMALL_LETTER_SHARP_S) && \ | |
137165a6 | 575 | (ANYOF_NONBITMAP(node)) && \ |
39065660 | 576 | (ANYOF_FLAGS(node) & ANYOF_LOC_NONBITMAP_FOLD) && \ |
07b6858f | 577 | ((end) > (input) + 1) && \ |
d22b930b KW |
578 | toFOLD((input)[0]) == 's' && \ |
579 | toFOLD((input)[1]) == 's') | |
ebc501f0 | 580 | #define SHARP_S_SKIP 2 |
3b0fc154 | 581 | |
a4f7a67c KW |
582 | /* If you want to exclude surrogates, and beyond legal Unicode, see the blame |
583 | * log for earlier versions which gave details for these */ | |
4d646140 KW |
584 | |
585 | #ifndef EBCDIC | |
586 | /* This was generated by regen/regcharclass.pl, and then moved here. The lines | |
587 | * that generated it were then commented out. This was done solely because it | |
588 | * takes on the order of 10 minutes to generate, and is never going to change. | |
589 | * The EBCDIC equivalent hasn't been commented out in regcharclass.pl, so it | |
590 | * should generate and run the correct stuff */ | |
39a0f513 YO |
591 | /* |
592 | UTF8_CHAR: Matches utf8 from 1 to 4 bytes | |
593 | ||
594 | 0x0 - 0x1FFFFF | |
595 | */ | |
4d646140 KW |
596 | /*** GENERATED CODE ***/ |
597 | #define is_UTF8_CHAR_utf8_safe(s,e) \ | |
598 | ( ((e)-(s) > 3) ? \ | |
599 | ( ( ( ((U8*)s)[0] & 0x80 ) == 0x00 ) ? 1 \ | |
600 | : ( 0xC2 <= ((U8*)s)[0] && ((U8*)s)[0] <= 0xDF ) ? \ | |
601 | ( ( ( ((U8*)s)[1] & 0xC0 ) == 0x80 ) ? 2 : 0 ) \ | |
602 | : ( 0xE0 == ((U8*)s)[0] ) ? \ | |
603 | ( ( ( ( ((U8*)s)[1] & 0xE0 ) == 0xA0 ) && ( ( ((U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\ | |
604 | : ( 0xE1 <= ((U8*)s)[0] && ((U8*)s)[0] <= 0xEF ) ? \ | |
605 | ( ( ( ( ((U8*)s)[1] & 0xC0 ) == 0x80 ) && ( ( ((U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\ | |
606 | : ( 0xF0 == ((U8*)s)[0] ) ? \ | |
607 | ( ( ( ( 0x90 <= ((U8*)s)[1] && ((U8*)s)[1] <= 0xBF ) && ( ( ((U8*)s)[2] & 0xC0 ) == 0x80 ) ) && ( ( ((U8*)s)[3] & 0xC0 ) == 0x80 ) ) ? 4 : 0 )\ | |
39a0f513 | 608 | : ( ( ( ( 0xF1 <= ((U8*)s)[0] && ((U8*)s)[0] <= 0xF7 ) && ( ( ((U8*)s)[1] & 0xC0 ) == 0x80 ) ) && ( ( ((U8*)s)[2] & 0xC0 ) == 0x80 ) ) && ( ( ((U8*)s)[3] & 0xC0 ) == 0x80 ) ) ? 4 : 0 )\ |
4d646140 KW |
609 | : ((e)-(s) > 2) ? \ |
610 | ( ( ( ((U8*)s)[0] & 0x80 ) == 0x00 ) ? 1 \ | |
611 | : ( 0xC2 <= ((U8*)s)[0] && ((U8*)s)[0] <= 0xDF ) ? \ | |
612 | ( ( ( ((U8*)s)[1] & 0xC0 ) == 0x80 ) ? 2 : 0 ) \ | |
613 | : ( 0xE0 == ((U8*)s)[0] ) ? \ | |
614 | ( ( ( ( ((U8*)s)[1] & 0xE0 ) == 0xA0 ) && ( ( ((U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\ | |
39a0f513 | 615 | : ( ( ( 0xE1 <= ((U8*)s)[0] && ((U8*)s)[0] <= 0xEF ) && ( ( ((U8*)s)[1] & 0xC0 ) == 0x80 ) ) && ( ( ((U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\ |
4d646140 KW |
616 | : ((e)-(s) > 1) ? \ |
617 | ( ( ( ((U8*)s)[0] & 0x80 ) == 0x00 ) ? 1 \ | |
39a0f513 | 618 | : ( ( 0xC2 <= ((U8*)s)[0] && ((U8*)s)[0] <= 0xDF ) && ( ( ((U8*)s)[1] & 0xC0 ) == 0x80 ) ) ? 2 : 0 )\ |
4d646140 KW |
619 | : ((e)-(s) > 0) ? \ |
620 | ( ( ((U8*)s)[0] & 0x80 ) == 0x00 ) \ | |
621 | : 0 ) | |
622 | #endif | |
3b0fc154 JH |
623 | |
624 | /* IS_UTF8_CHAR(p) is strictly speaking wrong (not UTF-8) because it | |
625 | * (1) allows UTF-8 encoded UTF-16 surrogates | |
626 | * (2) it allows code points past U+10FFFF. | |
627 | * The Perl_is_utf8_char() full "slow" code will handle the Perl | |
628 | * "extended UTF-8". */ | |
4d646140 | 629 | #define IS_UTF8_CHAR(p, n) (is_UTF8_CHAR_utf8_safe(p, (p) + (n)) == n) |
2f454f11 | 630 | |
4d646140 KW |
631 | /* regen/regcharclass.pl generates is_UTF8_CHAR_utf8_safe() macros for up to |
632 | * these number of bytes. So this has to be coordinated with it */ | |
633 | #ifdef EBCDIC | |
2f454f11 | 634 | # define IS_UTF8_CHAR_FAST(n) ((n) <= 5) |
4d646140 KW |
635 | #else |
636 | # define IS_UTF8_CHAR_FAST(n) ((n) <= 4) | |
637 | #endif | |
e9a8c099 | 638 | |
57f0e7e2 KW |
639 | #endif /* H_UTF8 */ |
640 | ||
e9a8c099 MHM |
641 | /* |
642 | * Local variables: | |
643 | * c-indentation-style: bsd | |
644 | * c-basic-offset: 4 | |
14d04a33 | 645 | * indent-tabs-mode: nil |
e9a8c099 MHM |
646 | * End: |
647 | * | |
14d04a33 | 648 | * ex: set ts=8 sts=4 sw=4 et: |
e9a8c099 | 649 | */ |