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lib/Unicode/UCD.pm: Clarify pod
[perl5.git] / utf8.h
CommitLineData
a0ed51b3
LW		 1/* utf8.h
2 *
2eee27d7
SS		 3 * Copyright (C) 2000, 2001, 2002, 2005, 2006, 2007, 2009,
4 * 2010, 2011 by Larry Wall and others
a0ed51b3
LW		 5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
57f0e7e2
KW		 11#ifndef H_UTF8 /* Guard against recursive inclusion */
12#define H_UTF8 1
13
39e02b42 14/* Use UTF-8 as the default script encoding?
1e54db1a 15 * Turning this on will break scripts having non-UTF-8 binary
39e02b42
JH		 16 * data (such as Latin-1) in string literals. */
17#ifdef USE_UTF8_SCRIPTS
18# define USE_UTF8_IN_NAMES (!IN_BYTES)
19#else
20# define USE_UTF8_IN_NAMES (PL_hints & HINT_UTF8)
21#endif
22
051a06d4
KW		 23/* For to_utf8_fold_flags, q.v. */
24#define FOLD_FLAGS_LOCALE 0x1
25#define FOLD_FLAGS_FULL 0x2
a0270393 26#define FOLD_FLAGS_NOMIX_ASCII 0x4
051a06d4 27
83199d38
KW		 28/* For _core_swash_init(), internal core use only */
29#define _CORE_SWASH_INIT_USER_DEFINED_PROPERTY 0x1
5d3d13d1 30#define _CORE_SWASH_INIT_RETURN_IF_UNDEF 0x2
87367d5f 31#define _CORE_SWASH_INIT_ACCEPT_INVLIST 0x4
83199d38 32
a0270393 33#define to_uni_fold(c, p, lenp) _to_uni_fold_flags(c, p, lenp, FOLD_FLAGS_FULL)
051a06d4
KW		 34#define to_utf8_fold(c, p, lenp) _to_utf8_fold_flags(c, p, lenp, \
35 FOLD_FLAGS_FULL, NULL)
36#define to_utf8_lower(a,b,c) _to_utf8_lower_flags(a,b,c,0, NULL)
37#define to_utf8_upper(a,b,c) _to_utf8_upper_flags(a,b,c,0, NULL)
38#define to_utf8_title(a,b,c) _to_utf8_title_flags(a,b,c,0, NULL)
36bb2ab6 39
fd7cb289
RGS		 40/* Source backward compatibility. */
41#define uvuni_to_utf8(d, uv) uvuni_to_utf8_flags(d, uv, 0)
42#define is_utf8_string_loc(s, len, ep) is_utf8_string_loclen(s, len, ep, 0)
43
eda9cac1
KW		 44#define foldEQ_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2) \
45 foldEQ_utf8_flags(s1, pe1, l1, u1, s2, pe2, l2, u2, 0)
a33c29bc 46#define FOLDEQ_UTF8_NOMIX_ASCII (1 << 0)
5e64d0fa 47#define FOLDEQ_UTF8_LOCALE (1 << 1)
18f762c3
KW		 48#define FOLDEQ_S1_ALREADY_FOLDED (1 << 2)
49#define FOLDEQ_S2_ALREADY_FOLDED (1 << 3)
a33c29bc 50
e6226b18
KW		 51/*
52=for apidoc ibcmp_utf8
53
54This is a synonym for (! foldEQ_utf8())
55
56=cut
57*/
58#define ibcmp_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2) \
59 cBOOL(! foldEQ_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2))
60
1d72bdf6
NIS		 61#ifdef EBCDIC
62/* The equivalent of these macros but implementing UTF-EBCDIC
63 are in the following header file:
64 */
65
66#include "utfebcdic.h"
fd7cb289 67
d06134e5 68#else /* ! EBCDIC */
73c4f7a1
GS		 69START_EXTERN_C
70
a0ed51b3 71#ifdef DOINIT
6f06b55f 72EXTCONST unsigned char PL_utf8skip[] = {
b2635aa8
KW		 73/* 0x00 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
74/* 0x10 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
75/* 0x20 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
76/* 0x30 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
77/* 0x40 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
78/* 0x50 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
79/* 0x60 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
80/* 0x70 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
81/* 0x80 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */
82/* 0x90 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */
83/* 0xA0 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */
84/* 0xB0 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */
85/* 0xC0 */ 2,2, /* overlong */
86/* 0xC2 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* U+0080 to U+03FF */
87/* 0xD0 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* U+0400 to U+07FF */
88/* 0xE0 */ 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, /* U+0800 to U+FFFF */
89/* 0xF0 */ 4,4,4,4,4,4,4,4,5,5,5,5,6,6, /* above BMP to 2**31 - 1 */
90/* 0xFE */ 7,13, /* Perl extended (never was official UTF-8). Up to 72bit
91 allowed (64-bit + reserved). */
a0ed51b3
LW		 92};
93#else
6f06b55f 94EXTCONST unsigned char PL_utf8skip[];
a0ed51b3
LW		 95#endif
96
73c4f7a1 97END_EXTERN_C
7e2040f0 98
b96a92fb 99#include "regcharclass.h"
ec34087a
KW		 100#include "unicode_constants.h"
101
1d72bdf6
NIS		 102/* Native character to iso-8859-1 */
103#define NATIVE_TO_ASCII(ch) (ch)
104#define ASCII_TO_NATIVE(ch) (ch)
105/* Transform after encoding */
106#define NATIVE_TO_UTF(ch) (ch)
428921e5 107#define NATIVE_TO_I8(ch) NATIVE_TO_UTF(ch) /* a clearer synonym */
1d72bdf6 108#define UTF_TO_NATIVE(ch) (ch)
428921e5 109#define I8_TO_NATIVE(ch) UTF_TO_NATIVE(ch)
1d72bdf6
NIS		 110/* Transforms in wide UV chars */
111#define UNI_TO_NATIVE(ch) (ch)
112#define NATIVE_TO_UNI(ch) (ch)
113/* Transforms in invariant space */
114#define NATIVE_TO_NEED(enc,ch) (ch)
115#define ASCII_TO_NEED(enc,ch) (ch)
d7578b48 116
d06134e5 117/* As there are no translations, avoid the function wrapper */
1754c1a1 118#define utf8n_to_uvchr utf8n_to_uvuni
6dd9dce9 119#define valid_utf8_to_uvchr valid_utf8_to_uvuni
1754c1a1 120#define uvchr_to_utf8 uvuni_to_utf8
2b9d42f0 121
877d9f0d 122/*
9041c2e3 123
8c007b5a 124 The following table is from Unicode 3.2.
877d9f0d
JH		 125
126 Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
127
375122d7 128 U+0000..U+007F 00..7F
e1b711da 129 U+0080..U+07FF * C2..DF 80..BF
37e2e78e 130 U+0800..U+0FFF E0 * A0..BF 80..BF
375122d7 131 U+1000..U+CFFF E1..EC 80..BF 80..BF
e1b711da 132 U+D000..U+D7FF ED 80..9F 80..BF
37e2e78e 133 U+D800..U+DFFF +++++++ utf16 surrogates, not legal utf8 +++++++
375122d7 134 U+E000..U+FFFF EE..EF 80..BF 80..BF
37e2e78e 135 U+10000..U+3FFFF F0 * 90..BF 80..BF 80..BF
877d9f0d
JH		 136 U+40000..U+FFFFF F1..F3 80..BF 80..BF 80..BF
137 U+100000..U+10FFFF F4 80..8F 80..BF 80..BF
b2635aa8
KW		 138 Below are non-Unicode code points
139 U+110000..U+13FFFF F4 90..BF 80..BF 80..BF
140 U+110000..U+1FFFFF F5..F7 80..BF 80..BF 80..BF
141 U+200000: F8.. * 88..BF 80..BF 80..BF 80..BF
877d9f0d 142
e1b711da 143Note the gaps before several of the byte entries above marked by '*'. These are
37e2e78e
KW		 144caused by legal UTF-8 avoiding non-shortest encodings: it is technically
145possible to UTF-8-encode a single code point in different ways, but that is
146explicitly forbidden, and the shortest possible encoding should always be used
15824458 147(and that is what Perl does). The non-shortest ones are called 'overlongs'.
8c007b5a 148
877d9f0d
JH		 149 */
150
8c007b5a
JH		 151/*
152 Another way to look at it, as bits:
153
b2635aa8 154 Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
8c007b5a 155
b2635aa8
KW		 156 0aaa aaaa 0aaa aaaa
157 0000 0bbb bbaa aaaa 110b bbbb 10aa aaaa
158 cccc bbbb bbaa aaaa 1110 cccc 10bb bbbb 10aa aaaa
159 00 000d ddcc cccc bbbb bbaa aaaa 1111 0ddd 10cc cccc 10bb bbbb 10aa aaaa
8c007b5a
JH		 160
161As you can see, the continuation bytes all begin with C<10>, and the
e1b711da 162leading bits of the start byte tell how many bytes there are in the
8c007b5a
JH		 163encoded character.
164
65ab9279
TC		 165Perl's extended UTF-8 means we can have start bytes up to FF.
166
8c007b5a
JH		 167*/
168
15824458
KW		 169/* Is the representation of the Unicode code point 'c' the same regardless of
170 * being encoded in UTF-8 or not? */
c4d5f83a 171#define UNI_IS_INVARIANT(c) (((UV)c) < 0x80)
15824458
KW		 172
173/* Is the UTF8-encoded byte 'c' part of a variant sequence in UTF-8? This is
174 * the inverse of UTF8_IS_INVARIANT */
175#define UTF8_IS_CONTINUED(c) (((U8)c) & 0x80)
176
177/* Is the byte 'c' the first byte of a multi-byte UTF8-8 encoded sequence?
178 * This doesn't catch invariants (they are single-byte). It also excludes the
179 * illegal overlong sequences that begin with C0 and C1. */
0447e8df 180#define UTF8_IS_START(c) (((U8)c) >= 0xc2)
15824458
KW		 181
182/* Is the byte 'c' part of a multi-byte UTF8-8 encoded sequence, and not the
183 * first byte thereof? */
e021c6e6 184#define UTF8_IS_CONTINUATION(c) ((((U8)c) & 0xC0) == 0x80)
0ae1fa71 185
15824458
KW		 186/* Is the UTF8-encoded byte 'c' the first byte of a two byte sequence? Use
187 * UTF8_IS_NEXT_CHAR_DOWNGRADEABLE() instead if the input isn't known to
188 * be well-formed. Masking with 0xfe allows the low bit to be 0 or 1; thus
189 * this matches 0xc[23]. */
559c7f10 190#define UTF8_IS_DOWNGRADEABLE_START(c) (((U8)(c) & 0xfe) == 0xc2)
4ab10950 191
15824458
KW		 192/* Is the UTF8-encoded byte 'c' the first byte of a sequence of bytes that
193 * represent a code point > 255? */
7b4252f4 194#define UTF8_IS_ABOVE_LATIN1(c) ((U8)(c) >= 0xc4)
8850bf83 195
15824458
KW		 196/* This defines the 1-bits that are to be in the first byte of a multi-byte
197 * UTF-8 encoded character that give the number of bytes that comprise the
198 * character.
199 * */
22901f30 200#define UTF_START_MARK(len) (((len) > 7) ? 0xFF : (0xFE << (7-(len))))
b2635aa8
KW		 201
202/* Masks out the initial one bits in a start byte, leaving the real data ones.
203 * Doesn't work on an invariant byte */
22901f30 204#define UTF_START_MASK(len) (((len) >= 7) ? 0x00 : (0x1F >> ((len)-2)))
1d72bdf6 205
15824458
KW		 206/* This defines the bits that are to be in the continuation bytes of a multi-byte
207 * UTF-8 encoded character that indicate it is a continuation byte. */
1d72bdf6 208#define UTF_CONTINUATION_MARK 0x80
15824458
KW		 209
210/* This is the number of low-order bits a continuation byte in a UTF-8 encoded
211 * sequence contributes to the specification of the code point. In the bit
212 * maps above, you see that the first 2 bits are a constant '10', leaving 6 of
213 * real information */
1d72bdf6 214#define UTF_ACCUMULATION_SHIFT 6
b2635aa8
KW		 215
216/* 2**UTF_ACCUMULATION_SHIFT - 1 */
1d72bdf6 217#define UTF_CONTINUATION_MASK ((U8)0x3f)
c512ce4f 218
15824458
KW		 219/* If a value is anded with this, and the result is non-zero, then using the
220 * original value in UTF8_ACCUMULATE will overflow, shifting bits off the left
221 * */
eb83ed87 222#define UTF_ACCUMULATION_OVERFLOW_MASK \
bb88be5f
KW		 223 (((UV) UTF_CONTINUATION_MASK) << ((sizeof(UV) * CHARBITS) \
224 - UTF_ACCUMULATION_SHIFT))
eb83ed87 225
1d68d6cd 226#ifdef HAS_QUAD
5bbb0b5a 227#define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
1d68d6cd
SC		 228 (uv) < 0x800 ? 2 : \
229 (uv) < 0x10000 ? 3 : \
230 (uv) < 0x200000 ? 4 : \
231 (uv) < 0x4000000 ? 5 : \
232 (uv) < 0x80000000 ? 6 : \
9041c2e3 233 (uv) < UTF8_QUAD_MAX ? 7 : 13 )
1d68d6cd
SC		 234#else
235/* No, I'm not even going to *TRY* putting #ifdef inside a #define */
5bbb0b5a 236#define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
1d68d6cd
SC		 237 (uv) < 0x800 ? 2 : \
238 (uv) < 0x10000 ? 3 : \
239 (uv) < 0x200000 ? 4 : \
240 (uv) < 0x4000000 ? 5 : \
241 (uv) < 0x80000000 ? 6 : 7 )
242#endif
243
03c76984
KW		 244/* How wide can a single UTF-8 encoded character become in bytes. */
245/* NOTE: Strictly speaking Perl's UTF-8 should not be called UTF-8 since UTF-8
246 * is an encoding of Unicode, and Unicode's upper limit, 0x10FFFF, can be
247 * expressed with 4 bytes. However, Perl thinks of UTF-8 as a way to encode
248 * non-negative integers in a binary format, even those above Unicode */
249#define UTF8_MAXBYTES 13
250
251/* The maximum number of UTF-8 bytes a single Unicode character can
252 * uppercase/lowercase/fold into. Unicode guarantees that the maximum
253 * expansion is 3 characters. On ASCIIish platforms, the highest Unicode
254 * character occupies 4 bytes, therefore this number would be 12, but this is
255 * smaller than the maximum width a single above-Unicode character can occupy,
256 * so use that instead */
257#if UTF8_MAXBYTES < 12
258#error UTF8_MAXBYTES must be at least 12
259#endif
260
261#define UTF8_MAXBYTES_CASE UTF8_MAXBYTES
262
d06134e5
KW		 263#endif /* EBCDIC vs ASCII */
264
265/* Rest of these are attributes of Unicode and perl's internals rather than the
266 * encoding, or happen to be the same in both ASCII and EBCDIC (at least at
267 * this level; the macros that some of these call may have different
268 * definitions in the two encodings */
269
270#define NATIVE8_TO_UNI(ch) NATIVE_TO_ASCII(ch) /* a clearer synonym */
271
bb88be5f
KW		 272#define UTF8_ACCUMULATE(old, new) (((old) << UTF_ACCUMULATION_SHIFT) \
273 | (((U8)new) & UTF_CONTINUATION_MASK))
d06134e5 274
4ab10950
KW		 275/* This works in the face of malformed UTF-8. */
276#define UTF8_IS_NEXT_CHAR_DOWNGRADEABLE(s, e) (UTF8_IS_DOWNGRADEABLE_START(*s) \
277 && ( (e) - (s) > 1) \
278 && UTF8_IS_CONTINUATION(*((s)+1)))
279
2950f2a7
KW		 280/* Convert a two (not one) byte utf8 character to a unicode code point value.
281 * Needs just one iteration of accumulate. Should not be used unless it is
282 * known that the two bytes are legal: 1) two-byte start, and 2) continuation.
283 * Note that the result can be larger than 255 if the input character is not
284 * downgradable */
285#define TWO_BYTE_UTF8_TO_UNI(HI, LO) \
286 UTF8_ACCUMULATE((NATIVE_TO_UTF(HI) & UTF_START_MASK(2)), \
287 NATIVE_TO_UTF(LO))
288
15824458
KW		 289/* How many bytes in the UTF-8 encoded character whose first (perhaps only)
290 * byte is pointed to by 's' */
d06134e5
KW		 291#define UTF8SKIP(s) PL_utf8skip[*(const U8*)(s)]
292
15824458
KW		 293/* Is the byte 'c' the same character when encoded in UTF-8 as when not. This
294 * works on both UTF-8 encoded strings and non-encoded, as it returns TRUE in
295 * each for the exact same set of bit patterns. (And it works on any byte in a
296 * UTF-8 encoded string) */
d06134e5 297#define UTF8_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE_TO_UTF(c))
15824458 298
d06134e5
KW		 299#define NATIVE_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE8_TO_UNI(c))
300
301#define MAX_PORTABLE_UTF8_TWO_BYTE 0x3FF /* constrained by EBCDIC */
302
303/* The macros in the next sets are used to generate the two utf8 or utfebcdic
304 * bytes from an ordinal that is known to fit into two bytes; it must be less
305 * than 0x3FF to work across both encodings. */
306/* Nocast allows these to be used in the case label of a switch statement */
428921e5
KW		 307#define UTF8_TWO_BYTE_HI_nocast(c) NATIVE_TO_I8(((c) \
308 >> UTF_ACCUMULATION_SHIFT) | (0xFF & UTF_START_MARK(2)))
309#define UTF8_TWO_BYTE_LO_nocast(c) NATIVE_TO_I8(((c) & UTF_CONTINUATION_MASK) \
310 | UTF_CONTINUATION_MARK)
d06134e5
KW		 311
312#define UTF8_TWO_BYTE_HI(c) ((U8) (UTF8_TWO_BYTE_HI_nocast(c)))
313#define UTF8_TWO_BYTE_LO(c) ((U8) (UTF8_TWO_BYTE_LO_nocast(c)))
314
315/* This name is used when the source is a single byte */
316#define UTF8_EIGHT_BIT_HI(c) UTF8_TWO_BYTE_HI((U8)(c))
317#define UTF8_EIGHT_BIT_LO(c) UTF8_TWO_BYTE_LO((U8)(c))
318
7e2040f0 319/*
e3036cf4 320 * 'UTF' is whether or not p is encoded in UTF8. The names 'foo_lazy_if' stem
20df05f4
KW		 321 * from an earlier version of these macros in which they didn't call the
322 * foo_utf8() macros (i.e. were 'lazy') unless they decided that *p is the
323 * beginning of a utf8 character. Now that foo_utf8() determines that itself,
324 * no need to do it again here
7e2040f0 325 */
e3036cf4
KW		 326#define isIDFIRST_lazy_if(p,UTF) ((IN_BYTES || !UTF ) \
327 ? isIDFIRST(*(p)) \
328 : isIDFIRST_utf8((const U8*)p))
32636478
KW		 329#define isWORDCHAR_lazy_if(p,UTF) ((IN_BYTES || (!UTF )) \
330 ? isWORDCHAR(*(p)) \
331 : isWORDCHAR_utf8((const U8*)p))
332#define isALNUM_lazy_if(p,UTF) isWORDCHAR_lazy_if(p,UTF)
1d72bdf6 333
89ebb4a3
JH		 334#define UTF8_MAXLEN UTF8_MAXBYTES
335
8cb75cc8
KW		 336/* A Unicode character can fold to up to 3 characters */
337#define UTF8_MAX_FOLD_CHAR_EXPAND 3
338
a98fe34d 339#define IN_BYTES (CopHINTS_get(PL_curcop) & HINT_BYTES)
0064a8a9 340#define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTES)
66cbab2c 341#define IN_UNI_8_BIT \
b36bf33f
KW		 342 (CopHINTS_get(PL_curcop) & (HINT_UNI_8_BIT|HINT_LOCALE_NOT_CHARS) \
343 && ! IN_LOCALE_RUNTIME && ! IN_BYTES)
344
1d72bdf6 345
c76687c5
KW		 346#define UTF8_ALLOW_EMPTY 0x0001 /* Allow a zero length string */
347
348/* Allow first byte to be a continuation byte */
1d72bdf6 349#define UTF8_ALLOW_CONTINUATION 0x0002
c76687c5
KW		 350
351/* Allow second... bytes to be non-continuation bytes */
1d72bdf6 352#define UTF8_ALLOW_NON_CONTINUATION 0x0004
949cf498
KW		 353
354/* expecting more bytes than were available in the string */
355#define UTF8_ALLOW_SHORT 0x0008
356
357/* Overlong sequence; i.e., the code point can be specified in fewer bytes. */
358#define UTF8_ALLOW_LONG 0x0010
359
360#define UTF8_DISALLOW_SURROGATE 0x0020 /* Unicode surrogates */
361#define UTF8_WARN_SURROGATE 0x0040
362
363#define UTF8_DISALLOW_NONCHAR 0x0080 /* Unicode non-character */
364#define UTF8_WARN_NONCHAR 0x0100 /* code points */
365
366#define UTF8_DISALLOW_SUPER 0x0200 /* Super-set of Unicode: code */
367#define UTF8_WARN_SUPER 0x0400 /* points above the legal max */
368
369/* Code points which never were part of the original UTF-8 standard, the first
370 * byte of which is a FE or FF on ASCII platforms. */
371#define UTF8_DISALLOW_FE_FF 0x0800
372#define UTF8_WARN_FE_FF 0x1000
373
374#define UTF8_CHECK_ONLY 0x2000
375
376/* For backwards source compatibility. They do nothing, as the default now
377 * includes what they used to mean. The first one's meaning was to allow the
378 * just the single non-character 0xFFFF */
379#define UTF8_ALLOW_FFFF 0
380#define UTF8_ALLOW_SURROGATE 0
381
33d9abfb 382#define UTF8_DISALLOW_ILLEGAL_INTERCHANGE (UTF8_DISALLOW_SUPER|UTF8_DISALLOW_NONCHAR|UTF8_DISALLOW_SURROGATE|UTF8_DISALLOW_FE_FF)
949cf498 383#define UTF8_WARN_ILLEGAL_INTERCHANGE \
33d9abfb 384 (UTF8_WARN_SUPER|UTF8_WARN_NONCHAR|UTF8_WARN_SURROGATE|UTF8_WARN_FE_FF)
949cf498
KW		 385#define UTF8_ALLOW_ANY \
386 (~(UTF8_DISALLOW_ILLEGAL_INTERCHANGE|UTF8_WARN_ILLEGAL_INTERCHANGE))
387#define UTF8_ALLOW_ANYUV \
388 (UTF8_ALLOW_EMPTY \
389 & ~(UTF8_DISALLOW_ILLEGAL_INTERCHANGE|UTF8_WARN_ILLEGAL_INTERCHANGE))
9f7f3913
TS		 390#define UTF8_ALLOW_DEFAULT (ckWARN(WARN_UTF8) ? 0 : \
391 UTF8_ALLOW_ANYUV)
1d72bdf6 392
7131f24d
KW		 393/* Surrogates, non-character code points and above-Unicode code points are
394 * problematic in some contexts. This allows code that needs to check for
395 * those to to quickly exclude the vast majority of code points it will
396 * encounter */
b96a92fb
KW		 397#define UTF8_FIRST_PROBLEMATIC_CODE_POINT_FIRST_BYTE \
398 FIRST_SURROGATE_UTF8_FIRST_BYTE
7131f24d 399
b96a92fb
KW		 400#define UTF8_IS_SURROGATE(s) cBOOL(is_SURROGATE_utf8(s))
401#define UTF8_IS_REPLACEMENT(s, send) cBOOL(is_REPLACEMENT_utf8_safe(s,send))
7131f24d
KW		 402
403/* ASCII EBCDIC I8
404 * U+10FFFF: \xF4\x8F\xBF\xBF \xF9\xA1\xBF\xBF\xBF max legal Unicode
405 * U+110000: \xF4\x90\x80\x80 \xF9\xA2\xA0\xA0\xA0
406 * U+110001: \xF4\x90\x80\x81 \xF9\xA2\xA0\xA0\xA1
407 */
408#ifdef EBCDIC /* Both versions assume well-formed UTF8 */
0404c92a
KW		 409# define UTF8_IS_SUPER(s) (NATIVE_TO_I8(* (U8*) (s)) >= 0xF9 \
410 && (NATIVE_TO_I8(* (U8*) (s)) > 0xF9 \
411 || (NATIVE_TO_I8(* (U8*) ((s)) + 1 >= 0xA2))))
7131f24d 412#else
0404c92a
KW		 413# define UTF8_IS_SUPER(s) (*(U8*) (s) >= 0xF4 \
414 && (*(U8*) (s) > 0xF4 || (*((U8*) (s) + 1) >= 0x90)))
7131f24d
KW		 415#endif
416
b96a92fb
KW		 417/* These are now machine generated, and the 'given' clause is no longer
418 * applicable */
419#define UTF8_IS_NONCHAR_GIVEN_THAT_NON_SUPER_AND_GE_PROBLEMATIC(s) \
420 cBOOL(is_NONCHAR_utf8(s))
421#define UTF8_IS_NONCHAR_(s) \
422 UTF8_IS_NONCHAR_GIVEN_THAT_NON_SUPER_AND_GE_PROBLEMATIC(s)
7131f24d 423
c867b360
JH		 424#define UNICODE_SURROGATE_FIRST 0xD800
425#define UNICODE_SURROGATE_LAST 0xDFFF
426#define UNICODE_REPLACEMENT 0xFFFD
427#define UNICODE_BYTE_ORDER_MARK 0xFEFF
1d72bdf6 428
b851fbc1 429/* Though our UTF-8 encoding can go beyond this,
c76687c5 430 * let's be conservative and do as Unicode says. */
b851fbc1
JH		 431#define PERL_UNICODE_MAX 0x10FFFF
432
949cf498
KW		 433#define UNICODE_WARN_SURROGATE 0x0001 /* UTF-16 surrogates */
434#define UNICODE_WARN_NONCHAR 0x0002 /* Non-char code points */
435#define UNICODE_WARN_SUPER 0x0004 /* Above 0x10FFFF */
436#define UNICODE_WARN_FE_FF 0x0008 /* Above 0x10FFFF */
437#define UNICODE_DISALLOW_SURROGATE 0x0010
438#define UNICODE_DISALLOW_NONCHAR 0x0020
439#define UNICODE_DISALLOW_SUPER 0x0040
440#define UNICODE_DISALLOW_FE_FF 0x0080
bb88be5f
KW		 441#define UNICODE_WARN_ILLEGAL_INTERCHANGE \
442 (UNICODE_WARN_SURROGATE|UNICODE_WARN_NONCHAR|UNICODE_WARN_SUPER)
443#define UNICODE_DISALLOW_ILLEGAL_INTERCHANGE \
444 (UNICODE_DISALLOW_SURROGATE|UNICODE_DISALLOW_NONCHAR|UNICODE_DISALLOW_SUPER)
949cf498
KW		 445
446/* For backward source compatibility, as are now the default */
447#define UNICODE_ALLOW_SURROGATE 0
448#define UNICODE_ALLOW_SUPER 0
449#define UNICODE_ALLOW_ANY 0
b851fbc1 450
1d72bdf6
NIS		 451#define UNICODE_IS_SURROGATE(c) ((c) >= UNICODE_SURROGATE_FIRST && \
452 (c) <= UNICODE_SURROGATE_LAST)
a10ec373 453#define UNICODE_IS_REPLACEMENT(c) ((c) == UNICODE_REPLACEMENT)
872c91ae 454#define UNICODE_IS_BYTE_ORDER_MARK(c) ((c) == UNICODE_BYTE_ORDER_MARK)
7131f24d
KW		 455#define UNICODE_IS_NONCHAR(c) ((c >= 0xFDD0 && c <= 0xFDEF) \
456 /* The other noncharacters end in FFFE or FFFF, which \
457 * the mask below catches both of, but beyond the last \
458 * official unicode code point, they aren't \
459 * noncharacters, since those aren't Unicode \
460 * characters at all */ \
461 || ((((c & 0xFFFE) == 0xFFFE)) && ! UNICODE_IS_SUPER(c)))
462#define UNICODE_IS_SUPER(c) ((c) > PERL_UNICODE_MAX)
463#define UNICODE_IS_FE_FF(c) ((c) > 0x7FFFFFFF)
1d72bdf6 464
f067b878
NA		 465#ifdef HAS_QUAD
466# define UTF8_QUAD_MAX UINT64_C(0x1000000000)
467#endif
3bd709b1 468
ec34087a
KW		 469#define LATIN_SMALL_LETTER_SHARP_S LATIN_SMALL_LETTER_SHARP_S_NATIVE
470#define LATIN_SMALL_LETTER_Y_WITH_DIAERESIS \
471 LATIN_SMALL_LETTER_Y_WITH_DIAERESIS_NATIVE
472#define MICRO_SIGN MICRO_SIGN_NATIVE
473#define LATIN_CAPITAL_LETTER_A_WITH_RING_ABOVE \
474 LATIN_CAPITAL_LETTER_A_WITH_RING_ABOVE_NATIVE
475#define LATIN_SMALL_LETTER_A_WITH_RING_ABOVE \
476 LATIN_SMALL_LETTER_A_WITH_RING_ABOVE_NATIVE
09091399
JH		 477#define UNICODE_GREEK_CAPITAL_LETTER_SIGMA 0x03A3
478#define UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA 0x03C2
479#define UNICODE_GREEK_SMALL_LETTER_SIGMA 0x03C3
9dcbe121 480#define GREEK_SMALL_LETTER_MU 0x03BC
78a0d3cc
KW		 481#define GREEK_CAPITAL_LETTER_MU 0x039C /* Upper and title case of MICRON */
482#define LATIN_CAPITAL_LETTER_Y_WITH_DIAERESIS 0x0178 /* Also is title case */
97298f37 483#define LATIN_CAPITAL_LETTER_SHARP_S 0x1E9E
8d64d87f
KW		 484#define LATIN_SMALL_LETTER_LONG_S 0x017F
485#define KELVIN_SIGN 0x212A
486#define ANGSTROM_SIGN 0x212B
09091399 487
9e55ce06 488#define UNI_DISPLAY_ISPRINT 0x0001
c728cb41
JH		 489#define UNI_DISPLAY_BACKSLASH 0x0002
490#define UNI_DISPLAY_QQ (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
491#define UNI_DISPLAY_REGEX (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
9e55ce06 492
5cd46e1f
KW		 493#define ANYOF_FOLD_SHARP_S(node, input, end) \
494 (ANYOF_BITMAP_TEST(node, LATIN_SMALL_LETTER_SHARP_S) && \
137165a6 495 (ANYOF_NONBITMAP(node)) && \
39065660 496 (ANYOF_FLAGS(node) & ANYOF_LOC_NONBITMAP_FOLD) && \
07b6858f
JH		 497 ((end) > (input) + 1) && \
498 toLOWER((input)[0]) == 's' && \
499 toLOWER((input)[1]) == 's')
ebc501f0 500#define SHARP_S_SKIP 2
3b0fc154 501
a4f7a67c
KW		 502/* If you want to exclude surrogates, and beyond legal Unicode, see the blame
503 * log for earlier versions which gave details for these */
4d646140
KW		 504
505#ifndef EBCDIC
506/* This was generated by regen/regcharclass.pl, and then moved here. The lines
507 * that generated it were then commented out. This was done solely because it
508 * takes on the order of 10 minutes to generate, and is never going to change.
509 * The EBCDIC equivalent hasn't been commented out in regcharclass.pl, so it
510 * should generate and run the correct stuff */
39a0f513
YO		 511/*
512 UTF8_CHAR: Matches utf8 from 1 to 4 bytes
513
514 0x0 - 0x1FFFFF
515*/
4d646140
KW		 516/*** GENERATED CODE ***/
517#define is_UTF8_CHAR_utf8_safe(s,e) \
518( ((e)-(s) > 3) ? \
519 ( ( ( ((U8*)s)[0] & 0x80 ) == 0x00 ) ? 1 \
520 : ( 0xC2 <= ((U8*)s)[0] && ((U8*)s)[0] <= 0xDF ) ? \
521 ( ( ( ((U8*)s)[1] & 0xC0 ) == 0x80 ) ? 2 : 0 ) \
522 : ( 0xE0 == ((U8*)s)[0] ) ? \
523 ( ( ( ( ((U8*)s)[1] & 0xE0 ) == 0xA0 ) && ( ( ((U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\
524 : ( 0xE1 <= ((U8*)s)[0] && ((U8*)s)[0] <= 0xEF ) ? \
525 ( ( ( ( ((U8*)s)[1] & 0xC0 ) == 0x80 ) && ( ( ((U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\
526 : ( 0xF0 == ((U8*)s)[0] ) ? \
527 ( ( ( ( 0x90 <= ((U8*)s)[1] && ((U8*)s)[1] <= 0xBF ) && ( ( ((U8*)s)[2] & 0xC0 ) == 0x80 ) ) && ( ( ((U8*)s)[3] & 0xC0 ) == 0x80 ) ) ? 4 : 0 )\
39a0f513 528 : ( ( ( ( 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		 529: ((e)-(s) > 2) ? \
530 ( ( ( ((U8*)s)[0] & 0x80 ) == 0x00 ) ? 1 \
531 : ( 0xC2 <= ((U8*)s)[0] && ((U8*)s)[0] <= 0xDF ) ? \
532 ( ( ( ((U8*)s)[1] & 0xC0 ) == 0x80 ) ? 2 : 0 ) \
533 : ( 0xE0 == ((U8*)s)[0] ) ? \
534 ( ( ( ( ((U8*)s)[1] & 0xE0 ) == 0xA0 ) && ( ( ((U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\
39a0f513 535 : ( ( ( 0xE1 <= ((U8*)s)[0] && ((U8*)s)[0] <= 0xEF ) && ( ( ((U8*)s)[1] & 0xC0 ) == 0x80 ) ) && ( ( ((U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\
4d646140
KW		 536: ((e)-(s) > 1) ? \
537 ( ( ( ((U8*)s)[0] & 0x80 ) == 0x00 ) ? 1 \
39a0f513 538 : ( ( 0xC2 <= ((U8*)s)[0] && ((U8*)s)[0] <= 0xDF ) && ( ( ((U8*)s)[1] & 0xC0 ) == 0x80 ) ) ? 2 : 0 )\
4d646140
KW		 539: ((e)-(s) > 0) ? \
540 ( ( ((U8*)s)[0] & 0x80 ) == 0x00 ) \
541: 0 )
542#endif
3b0fc154
JH		 543
544/* IS_UTF8_CHAR(p) is strictly speaking wrong (not UTF-8) because it
545 * (1) allows UTF-8 encoded UTF-16 surrogates
546 * (2) it allows code points past U+10FFFF.
547 * The Perl_is_utf8_char() full "slow" code will handle the Perl
548 * "extended UTF-8". */
4d646140 549#define IS_UTF8_CHAR(p, n) (is_UTF8_CHAR_utf8_safe(p, (p) + (n)) == n)
2f454f11 550
4d646140
KW		 551/* regen/regcharclass.pl generates is_UTF8_CHAR_utf8_safe() macros for up to
552 * these number of bytes. So this has to be coordinated with it */
553#ifdef EBCDIC
2f454f11 554# define IS_UTF8_CHAR_FAST(n) ((n) <= 5)
4d646140
KW		 555#else
556# define IS_UTF8_CHAR_FAST(n) ((n) <= 4)
557#endif
e9a8c099 558
57f0e7e2
KW		 559#endif /* H_UTF8 */
560
e9a8c099
MHM		 561/*
562 * Local variables:
563 * c-indentation-style: bsd
564 * c-basic-offset: 4
14d04a33 565 * indent-tabs-mode: nil
e9a8c099
MHM		 566 * End:
567 *
14d04a33 568 * ex: set ts=8 sts=4 sw=4 et:
e9a8c099 569 */
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