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Prepare for Unicode 6.2
[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
39e02b42 11/* Use UTF-8 as the default script encoding?
1e54db1a 12 * Turning this on will break scripts having non-UTF-8 binary
39e02b42
JH		 13 * data (such as Latin-1) in string literals. */
14#ifdef USE_UTF8_SCRIPTS
15# define USE_UTF8_IN_NAMES (!IN_BYTES)
16#else
17# define USE_UTF8_IN_NAMES (PL_hints & HINT_UTF8)
18#endif
19
051a06d4
KW		 20/* For to_utf8_fold_flags, q.v. */
21#define FOLD_FLAGS_LOCALE 0x1
22#define FOLD_FLAGS_FULL 0x2
a0270393 23#define FOLD_FLAGS_NOMIX_ASCII 0x4
051a06d4 24
83199d38
KW		 25/* For _core_swash_init(), internal core use only */
26#define _CORE_SWASH_INIT_USER_DEFINED_PROPERTY 0x1
5d3d13d1 27#define _CORE_SWASH_INIT_RETURN_IF_UNDEF 0x2
87367d5f 28#define _CORE_SWASH_INIT_ACCEPT_INVLIST 0x4
83199d38 29
a0270393 30#define to_uni_fold(c, p, lenp) _to_uni_fold_flags(c, p, lenp, FOLD_FLAGS_FULL)
051a06d4
KW		 31#define to_utf8_fold(c, p, lenp) _to_utf8_fold_flags(c, p, lenp, \
32 FOLD_FLAGS_FULL, NULL)
33#define to_utf8_lower(a,b,c) _to_utf8_lower_flags(a,b,c,0, NULL)
34#define to_utf8_upper(a,b,c) _to_utf8_upper_flags(a,b,c,0, NULL)
35#define to_utf8_title(a,b,c) _to_utf8_title_flags(a,b,c,0, NULL)
36bb2ab6 36
fd7cb289
RGS		 37/* Source backward compatibility. */
38#define uvuni_to_utf8(d, uv) uvuni_to_utf8_flags(d, uv, 0)
39#define is_utf8_string_loc(s, len, ep) is_utf8_string_loclen(s, len, ep, 0)
40
eda9cac1
KW		 41#define foldEQ_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2) \
42 foldEQ_utf8_flags(s1, pe1, l1, u1, s2, pe2, l2, u2, 0)
a33c29bc 43#define FOLDEQ_UTF8_NOMIX_ASCII (1 << 0)
5e64d0fa 44#define FOLDEQ_UTF8_LOCALE (1 << 1)
18f762c3
KW		 45#define FOLDEQ_S1_ALREADY_FOLDED (1 << 2)
46#define FOLDEQ_S2_ALREADY_FOLDED (1 << 3)
a33c29bc 47
e6226b18
KW		 48/*
49=for apidoc ibcmp_utf8
50
51This is a synonym for (! foldEQ_utf8())
52
53=cut
54*/
55#define ibcmp_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2) \
56 cBOOL(! foldEQ_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2))
57
1d72bdf6
NIS		 58#ifdef EBCDIC
59/* The equivalent of these macros but implementing UTF-EBCDIC
60 are in the following header file:
61 */
62
63#include "utfebcdic.h"
fd7cb289 64
d06134e5 65#else /* ! EBCDIC */
73c4f7a1
GS		 66START_EXTERN_C
67
a0ed51b3 68#ifdef DOINIT
6f06b55f 69EXTCONST unsigned char PL_utf8skip[] = {
b2635aa8
KW		 70/* 0x00 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
71/* 0x10 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
72/* 0x20 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
73/* 0x30 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
74/* 0x40 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
75/* 0x50 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
76/* 0x60 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
77/* 0x70 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
78/* 0x80 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */
79/* 0x90 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */
80/* 0xA0 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */
81/* 0xB0 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */
82/* 0xC0 */ 2,2, /* overlong */
83/* 0xC2 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* U+0080 to U+03FF */
84/* 0xD0 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* U+0400 to U+07FF */
85/* 0xE0 */ 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, /* U+0800 to U+FFFF */
86/* 0xF0 */ 4,4,4,4,4,4,4,4,5,5,5,5,6,6, /* above BMP to 2**31 - 1 */
87/* 0xFE */ 7,13, /* Perl extended (never was official UTF-8). Up to 72bit
88 allowed (64-bit + reserved). */
a0ed51b3
LW		 89};
90#else
6f06b55f 91EXTCONST unsigned char PL_utf8skip[];
a0ed51b3
LW		 92#endif
93
73c4f7a1 94END_EXTERN_C
7e2040f0 95
1d72bdf6
NIS		 96/* Native character to iso-8859-1 */
97#define NATIVE_TO_ASCII(ch) (ch)
98#define ASCII_TO_NATIVE(ch) (ch)
99/* Transform after encoding */
100#define NATIVE_TO_UTF(ch) (ch)
101#define UTF_TO_NATIVE(ch) (ch)
102/* Transforms in wide UV chars */
103#define UNI_TO_NATIVE(ch) (ch)
104#define NATIVE_TO_UNI(ch) (ch)
105/* Transforms in invariant space */
106#define NATIVE_TO_NEED(enc,ch) (ch)
107#define ASCII_TO_NEED(enc,ch) (ch)
d7578b48 108
d06134e5 109/* As there are no translations, avoid the function wrapper */
1754c1a1 110#define utf8n_to_uvchr utf8n_to_uvuni
6dd9dce9 111#define valid_utf8_to_uvchr valid_utf8_to_uvuni
1754c1a1 112#define uvchr_to_utf8 uvuni_to_utf8
2b9d42f0 113
877d9f0d 114/*
9041c2e3 115
8c007b5a 116 The following table is from Unicode 3.2.
877d9f0d
JH		 117
118 Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
119
375122d7 120 U+0000..U+007F 00..7F
e1b711da 121 U+0080..U+07FF * C2..DF 80..BF
37e2e78e 122 U+0800..U+0FFF E0 * A0..BF 80..BF
375122d7 123 U+1000..U+CFFF E1..EC 80..BF 80..BF
e1b711da 124 U+D000..U+D7FF ED 80..9F 80..BF
37e2e78e 125 U+D800..U+DFFF +++++++ utf16 surrogates, not legal utf8 +++++++
375122d7 126 U+E000..U+FFFF EE..EF 80..BF 80..BF
37e2e78e 127 U+10000..U+3FFFF F0 * 90..BF 80..BF 80..BF
877d9f0d
JH		 128 U+40000..U+FFFFF F1..F3 80..BF 80..BF 80..BF
129 U+100000..U+10FFFF F4 80..8F 80..BF 80..BF
b2635aa8
KW		 130 Below are non-Unicode code points
131 U+110000..U+13FFFF F4 90..BF 80..BF 80..BF
132 U+110000..U+1FFFFF F5..F7 80..BF 80..BF 80..BF
133 U+200000: F8.. * 88..BF 80..BF 80..BF 80..BF
877d9f0d 134
e1b711da 135Note the gaps before several of the byte entries above marked by '*'. These are
37e2e78e
KW		 136caused by legal UTF-8 avoiding non-shortest encodings: it is technically
137possible to UTF-8-encode a single code point in different ways, but that is
138explicitly forbidden, and the shortest possible encoding should always be used
139(and that is what Perl does).
8c007b5a 140
877d9f0d
JH		 141 */
142
8c007b5a
JH		 143/*
144 Another way to look at it, as bits:
145
b2635aa8 146 Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
8c007b5a 147
b2635aa8
KW		 148 0aaa aaaa 0aaa aaaa
149 0000 0bbb bbaa aaaa 110b bbbb 10aa aaaa
150 cccc bbbb bbaa aaaa 1110 cccc 10bb bbbb 10aa aaaa
151 00 000d ddcc cccc bbbb bbaa aaaa 1111 0ddd 10cc cccc 10bb bbbb 10aa aaaa
8c007b5a
JH		 152
153As you can see, the continuation bytes all begin with C<10>, and the
e1b711da 154leading bits of the start byte tell how many bytes there are in the
8c007b5a
JH		 155encoded character.
156
65ab9279
TC		 157Perl's extended UTF-8 means we can have start bytes up to FF.
158
8c007b5a
JH		 159*/
160
c4d5f83a 161#define UNI_IS_INVARIANT(c) (((UV)c) < 0x80)
0447e8df 162#define UTF8_IS_START(c) (((U8)c) >= 0xc2)
c512ce4f
JH		 163#define UTF8_IS_CONTINUATION(c) (((U8)c) >= 0x80 && (((U8)c) <= 0xbf))
164#define UTF8_IS_CONTINUED(c) (((U8)c) & 0x80)
0ae1fa71
CH		 165
166/* Masking with 0xfe allows low bit to be 0 or 1; thus this matches 0xc[23] */
167#define UTF8_IS_DOWNGRADEABLE_START(c) (((U8)c & 0xfe) == 0xc2)
8850bf83 168
22901f30 169#define UTF_START_MARK(len) (((len) > 7) ? 0xFF : (0xFE << (7-(len))))
b2635aa8
KW		 170
171/* Masks out the initial one bits in a start byte, leaving the real data ones.
172 * Doesn't work on an invariant byte */
22901f30 173#define UTF_START_MASK(len) (((len) >= 7) ? 0x00 : (0x1F >> ((len)-2)))
1d72bdf6
NIS		 174
175#define UTF_CONTINUATION_MARK 0x80
176#define UTF_ACCUMULATION_SHIFT 6
b2635aa8
KW		 177
178/* 2**UTF_ACCUMULATION_SHIFT - 1 */
1d72bdf6 179#define UTF_CONTINUATION_MASK ((U8)0x3f)
c512ce4f 180
eb83ed87
KW		 181/* This sets the UTF_CONTINUATION_MASK in the upper bits of a word. If a value
182 * is anded with it, and the result is non-zero, then using the original value
183 * in UTF8_ACCUMULATE will overflow, shifting bits off the left */
184#define UTF_ACCUMULATION_OVERFLOW_MASK \
185 (((UV) UTF_CONTINUATION_MASK) << ((sizeof(UV) * CHARBITS) - UTF_ACCUMULATION_SHIFT))
186
1d68d6cd 187#ifdef HAS_QUAD
5bbb0b5a 188#define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
1d68d6cd
SC		 189 (uv) < 0x800 ? 2 : \
190 (uv) < 0x10000 ? 3 : \
191 (uv) < 0x200000 ? 4 : \
192 (uv) < 0x4000000 ? 5 : \
193 (uv) < 0x80000000 ? 6 : \
9041c2e3 194 (uv) < UTF8_QUAD_MAX ? 7 : 13 )
1d68d6cd
SC		 195#else
196/* No, I'm not even going to *TRY* putting #ifdef inside a #define */
5bbb0b5a 197#define UNISKIP(uv) ( (uv) < 0x80 ? 1 : \
1d68d6cd
SC		 198 (uv) < 0x800 ? 2 : \
199 (uv) < 0x10000 ? 3 : \
200 (uv) < 0x200000 ? 4 : \
201 (uv) < 0x4000000 ? 5 : \
202 (uv) < 0x80000000 ? 6 : 7 )
203#endif
204
d06134e5
KW		 205#endif /* EBCDIC vs ASCII */
206
207/* Rest of these are attributes of Unicode and perl's internals rather than the
208 * encoding, or happen to be the same in both ASCII and EBCDIC (at least at
209 * this level; the macros that some of these call may have different
210 * definitions in the two encodings */
211
212#define NATIVE8_TO_UNI(ch) NATIVE_TO_ASCII(ch) /* a clearer synonym */
213
214#define UTF8_ACCUMULATE(old, new) (((old) << UTF_ACCUMULATION_SHIFT) | (((U8)new) & UTF_CONTINUATION_MASK))
215
2950f2a7
KW		 216/* Convert a two (not one) byte utf8 character to a unicode code point value.
217 * Needs just one iteration of accumulate. Should not be used unless it is
218 * known that the two bytes are legal: 1) two-byte start, and 2) continuation.
219 * Note that the result can be larger than 255 if the input character is not
220 * downgradable */
221#define TWO_BYTE_UTF8_TO_UNI(HI, LO) \
222 UTF8_ACCUMULATE((NATIVE_TO_UTF(HI) & UTF_START_MASK(2)), \
223 NATIVE_TO_UTF(LO))
224
d06134e5
KW		 225#define UTF8SKIP(s) PL_utf8skip[*(const U8*)(s)]
226
227#define UTF8_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE_TO_UTF(c))
228#define NATIVE_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE8_TO_UNI(c))
229
230#define MAX_PORTABLE_UTF8_TWO_BYTE 0x3FF /* constrained by EBCDIC */
231
232/* The macros in the next sets are used to generate the two utf8 or utfebcdic
233 * bytes from an ordinal that is known to fit into two bytes; it must be less
234 * than 0x3FF to work across both encodings. */
235/* Nocast allows these to be used in the case label of a switch statement */
0072151e 236#define UTF8_TWO_BYTE_HI_nocast(c) UTF_TO_NATIVE(((c) >> UTF_ACCUMULATION_SHIFT) | (0xFF & UTF_START_MARK(2)))
14c28784 237#define UTF8_TWO_BYTE_LO_nocast(c) UTF_TO_NATIVE(((c) & UTF_CONTINUATION_MASK) | UTF_CONTINUATION_MARK)
d06134e5
KW		 238
239#define UTF8_TWO_BYTE_HI(c) ((U8) (UTF8_TWO_BYTE_HI_nocast(c)))
240#define UTF8_TWO_BYTE_LO(c) ((U8) (UTF8_TWO_BYTE_LO_nocast(c)))
241
242/* This name is used when the source is a single byte */
243#define UTF8_EIGHT_BIT_HI(c) UTF8_TWO_BYTE_HI((U8)(c))
244#define UTF8_EIGHT_BIT_LO(c) UTF8_TWO_BYTE_LO((U8)(c))
245
7e2040f0 246/*
e3036cf4 247 * 'UTF' is whether or not p is encoded in UTF8. The names 'foo_lazy_if' stem
20df05f4
KW		 248 * from an earlier version of these macros in which they didn't call the
249 * foo_utf8() macros (i.e. were 'lazy') unless they decided that *p is the
250 * beginning of a utf8 character. Now that foo_utf8() determines that itself,
251 * no need to do it again here
7e2040f0 252 */
e3036cf4
KW		 253#define isIDFIRST_lazy_if(p,UTF) ((IN_BYTES || !UTF ) \
254 ? isIDFIRST(*(p)) \
255 : isIDFIRST_utf8((const U8*)p))
256#define isALNUM_lazy_if(p,UTF) ((IN_BYTES || (!UTF )) \
257 ? isALNUM(*(p)) \
258 : isALNUM_utf8((const U8*)p))
1d72bdf6 259
7e2040f0
GS		 260#define isIDFIRST_lazy(p) isIDFIRST_lazy_if(p,1)
261#define isALNUM_lazy(p) isALNUM_lazy_if(p,1)
3bd709b1 262
89ebb4a3
JH		 263#define UTF8_MAXBYTES 13
264/* How wide can a single UTF-8 encoded character become in bytes.
265 * NOTE: Strictly speaking Perl's UTF-8 should not be called UTF-8
266 * since UTF-8 is an encoding of Unicode and given Unicode's current
267 * upper limit only four bytes is possible. Perl thinks of UTF-8
268 * as a way to encode non-negative integers in a binary format. */
269#define UTF8_MAXLEN UTF8_MAXBYTES
270
89ebb4a3
JH		 271/* The maximum number of UTF-8 bytes a single Unicode character can
272 * uppercase/lowercase/fold into; this number depends on the Unicode
273 * version. An example of maximal expansion is the U+03B0 which
274 * uppercases to U+03C5 U+0308 U+0301. The Unicode databases that
d06134e5 275 * tell these things are UnicodeData.txt, CaseFolding.txt, and
88d45ddf
KW		 276 * SpecialCasing.txt. The value is 6 for strict Unicode characters, but it has
277 * to be as big as Perl allows for a single character */
278#define UTF8_MAXBYTES_CASE UTF8_MAXBYTES
3bd709b1 279
8cb75cc8
KW		 280/* A Unicode character can fold to up to 3 characters */
281#define UTF8_MAX_FOLD_CHAR_EXPAND 3
282
a98fe34d 283#define IN_BYTES (CopHINTS_get(PL_curcop) & HINT_BYTES)
0064a8a9 284#define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTES)
66cbab2c 285#define IN_UNI_8_BIT \
b36bf33f
KW		 286 (CopHINTS_get(PL_curcop) & (HINT_UNI_8_BIT|HINT_LOCALE_NOT_CHARS) \
287 && ! IN_LOCALE_RUNTIME && ! IN_BYTES)
288
1d72bdf6 289
c76687c5
KW		 290#define UTF8_ALLOW_EMPTY 0x0001 /* Allow a zero length string */
291
292/* Allow first byte to be a continuation byte */
1d72bdf6 293#define UTF8_ALLOW_CONTINUATION 0x0002
c76687c5
KW		 294
295/* Allow second... bytes to be non-continuation bytes */
1d72bdf6 296#define UTF8_ALLOW_NON_CONTINUATION 0x0004
949cf498
KW		 297
298/* expecting more bytes than were available in the string */
299#define UTF8_ALLOW_SHORT 0x0008
300
301/* Overlong sequence; i.e., the code point can be specified in fewer bytes. */
302#define UTF8_ALLOW_LONG 0x0010
303
304#define UTF8_DISALLOW_SURROGATE 0x0020 /* Unicode surrogates */
305#define UTF8_WARN_SURROGATE 0x0040
306
307#define UTF8_DISALLOW_NONCHAR 0x0080 /* Unicode non-character */
308#define UTF8_WARN_NONCHAR 0x0100 /* code points */
309
310#define UTF8_DISALLOW_SUPER 0x0200 /* Super-set of Unicode: code */
311#define UTF8_WARN_SUPER 0x0400 /* points above the legal max */
312
313/* Code points which never were part of the original UTF-8 standard, the first
314 * byte of which is a FE or FF on ASCII platforms. */
315#define UTF8_DISALLOW_FE_FF 0x0800
316#define UTF8_WARN_FE_FF 0x1000
317
318#define UTF8_CHECK_ONLY 0x2000
319
320/* For backwards source compatibility. They do nothing, as the default now
321 * includes what they used to mean. The first one's meaning was to allow the
322 * just the single non-character 0xFFFF */
323#define UTF8_ALLOW_FFFF 0
324#define UTF8_ALLOW_SURROGATE 0
325
33d9abfb 326#define UTF8_DISALLOW_ILLEGAL_INTERCHANGE (UTF8_DISALLOW_SUPER|UTF8_DISALLOW_NONCHAR|UTF8_DISALLOW_SURROGATE|UTF8_DISALLOW_FE_FF)
949cf498 327#define UTF8_WARN_ILLEGAL_INTERCHANGE \
33d9abfb 328 (UTF8_WARN_SUPER|UTF8_WARN_NONCHAR|UTF8_WARN_SURROGATE|UTF8_WARN_FE_FF)
949cf498
KW		 329#define UTF8_ALLOW_ANY \
330 (~(UTF8_DISALLOW_ILLEGAL_INTERCHANGE|UTF8_WARN_ILLEGAL_INTERCHANGE))
331#define UTF8_ALLOW_ANYUV \
332 (UTF8_ALLOW_EMPTY \
333 & ~(UTF8_DISALLOW_ILLEGAL_INTERCHANGE|UTF8_WARN_ILLEGAL_INTERCHANGE))
9f7f3913
TS		 334#define UTF8_ALLOW_DEFAULT (ckWARN(WARN_UTF8) ? 0 : \
335 UTF8_ALLOW_ANYUV)
1d72bdf6 336
7131f24d
KW		 337/* Surrogates, non-character code points and above-Unicode code points are
338 * problematic in some contexts. This allows code that needs to check for
339 * those to to quickly exclude the vast majority of code points it will
340 * encounter */
341#ifdef EBCDIC
342# define UTF8_FIRST_PROBLEMATIC_CODE_POINT_FIRST_BYTE UTF_TO_NATIVE(0xF1)
343#else
344# define UTF8_FIRST_PROBLEMATIC_CODE_POINT_FIRST_BYTE 0xED
345#endif
346
347/* ASCII EBCDIC I8
348 * U+D7FF: \xED\x9F\xBF \xF1\xB5\xBF\xBF last before surrogates
349 * U+D800: \xED\xA0\x80 \xF1\xB6\xA0\xA0 1st surrogate
350 * U+DFFF: \xED\xBF\xBF \xF1\xB7\xBF\xBF final surrogate
351 * U+E000: \xEE\x80\x80 \xF1\xB8\xA0\xA0 next after surrogates
352 */
353#ifdef EBCDIC /* Both versions assume well-formed UTF8 */
b2635aa8
KW		 354# define UTF8_IS_SURROGATE(s) (*(s) == UTF_TO_NATIVE(0xF1) \
355 && ((*((s) +1) == UTF_TO_NATIVE(0xB6)) \
356 || *((s) + 1) == UTF_TO_NATIVE(0xB7)))
28936164
KW		 357 /* <send> points to one beyond the end of the string that starts at <s> */
358# define UTF8_IS_REPLACEMENT(s, send) (*(s) == UTF_TO_NATIVE(0xEF) \
359 && (send - s) >= 4 \
360 && *((s) + 1) == UTF_TO_NATIVE(0xBF) \
361 && *((s) + 2) == UTF_TO_NATIVE(0xBF) \
362 && *((s) + 3) == UTF_TO_NATIVE(0xBD)
7131f24d
KW		 363#else
364# define UTF8_IS_SURROGATE(s) (*(s) == 0xED && *((s) + 1) >= 0xA0)
28936164
KW		 365# define UTF8_IS_REPLACEMENT(s, send) (*(s) == 0xEF \
366 && (send - s) >= 3 \
367 && *((s) + 1) == 0xBF \
368 && *((s) + 2) == 0xBD)
7131f24d
KW		 369#endif
370
371/* ASCII EBCDIC I8
372 * U+10FFFF: \xF4\x8F\xBF\xBF \xF9\xA1\xBF\xBF\xBF max legal Unicode
373 * U+110000: \xF4\x90\x80\x80 \xF9\xA2\xA0\xA0\xA0
374 * U+110001: \xF4\x90\x80\x81 \xF9\xA2\xA0\xA0\xA1
375 */
376#ifdef EBCDIC /* Both versions assume well-formed UTF8 */
377# define UTF8_IS_SUPER(s) (*(s) >= UTF_TO_NATIVE(0xF9) \
378 && (*(s) > UTF_TO_NATIVE(0xF9) || (*((s) + 1) >= UTF_TO_NATIVE(0xA2))))
379#else
380# define UTF8_IS_SUPER(s) (*(s) >= 0xF4 \
381 && (*(s) > 0xF4 || (*((s) + 1) >= 0x90)))
382#endif
383
384/* ASCII EBCDIC I8
385 * U+FDCF: \xEF\xB7\x8F \xF1\xBF\xAE\xAF last before non-char block
386 * U+FDD0: \xEF\xB7\x90 \xF1\xBF\xAE\xB0 first non-char in block
387 * U+FDEF: \xEF\xB7\xAF \xF1\xBF\xAF\xAF last non-char in block
388 * U+FDF0: \xEF\xB7\xB0 \xF1\xBF\xAF\xB0 first after non-char block
389 * U+FFFF: \xEF\xBF\xBF \xF1\xBF\xBF\xBF
390 * U+1FFFF: \xF0\x9F\xBF\xBF \xF3\xBF\xBF\xBF
391 * U+2FFFF: \xF0\xAF\xBF\xBF \xF5\xBF\xBF\xBF
392 * U+3FFFF: \xF0\xBF\xBF\xBF \xF7\xBF\xBF\xBF
393 * U+4FFFF: \xF1\x8F\xBF\xBF \xF8\xA9\xBF\xBF\xBF
394 * U+5FFFF: \xF1\x9F\xBF\xBF \xF8\xAB\xBF\xBF\xBF
395 * U+6FFFF: \xF1\xAF\xBF\xBF \xF8\xAD\xBF\xBF\xBF
396 * U+7FFFF: \xF1\xBF\xBF\xBF \xF8\xAF\xBF\xBF\xBF
397 * U+8FFFF: \xF2\x8F\xBF\xBF \xF8\xB1\xBF\xBF\xBF
398 * U+9FFFF: \xF2\x9F\xBF\xBF \xF8\xB3\xBF\xBF\xBF
399 * U+AFFFF: \xF2\xAF\xBF\xBF \xF8\xB5\xBF\xBF\xBF
400 * U+BFFFF: \xF2\xBF\xBF\xBF \xF8\xB7\xBF\xBF\xBF
401 * U+CFFFF: \xF3\x8F\xBF\xBF \xF8\xB9\xBF\xBF\xBF
402 * U+DFFFF: \xF3\x9F\xBF\xBF \xF8\xBB\xBF\xBF\xBF
403 * U+EFFFF: \xF3\xAF\xBF\xBF \xF8\xBD\xBF\xBF\xBF
404 * U+FFFFF: \xF3\xBF\xBF\xBF \xF8\xBF\xBF\xBF\xBF
405 * U+10FFFF: \xF4\x8F\xBF\xBF \xF9\xA1\xBF\xBF\xBF
406 */
407#define UTF8_IS_NONCHAR_(s) ( \
408 *(s) >= UTF8_FIRST_PROBLEMATIC_CODE_POINT_FIRST_BYTE \
409 && ! UTF8_IS_SUPER(s) \
410 && UTF8_IS_NONCHAR_GIVEN_THAT_NON_SUPER_AND_GE_FIRST_PROBLEMATIC(s) \
411
412#ifdef EBCDIC /* Both versions assume well-formed UTF8 */
413# define UTF8_IS_NONCHAR_GIVEN_THAT_NON_SUPER_AND_GE_PROBLEMATIC(s) \
414 ((*(s) == UTF_TO_NATIVE(0xF1) \
415 && (*((s) + 1) == UTF_TO_NATIVE(0xBF) \
416 && ((*((s) + 2) == UTF_TO_NATIVE(0xAE) \
417 && *((s) + 3) >= UTF_TO_NATIVE(0xB0)) \
418 || (*((s) + 2) == UTF_TO_NATIVE(0xAF) \
419 && *((s) + 3) <= UTF_TO_NATIVE(0xAF))))) \
420 || (UTF8SKIP(*(s)) > 3 \
421 /* (These were all derived by inspection and experimentation with an */ \
422 /* editor) The next line checks the next to final byte in the char */ \
423 && *((s) + UTF8SKIP(*(s)) - 2) == UTF_TO_NATIVE(0xBF) \
424 && *((s) + UTF8SKIP(*(s)) - 3) == UTF_TO_NATIVE(0xBF) \
425 && (NATIVE_TO_UTF(*((s) + UTF8SKIP(*(s)) - 4)) & 0x81) == 0x81 \
426 && (NATIVE_TO_UTF(*((s) + UTF8SKIP(*(s)) - 1)) & 0xBE) == 0XBE))
427#else
428# define UTF8_IS_NONCHAR_GIVEN_THAT_NON_SUPER_AND_GE_PROBLEMATIC(s) \
429 ((*(s) == 0xEF \
430 && ((*((s) + 1) == 0xB7 && (*((s) + 2) >= 0x90 && (*((s) + 2) <= 0xAF)))\
431 /* Gets U+FFF[EF] */ \
432 || (*((s) + 1) == 0xBF && ((*((s) + 2) & 0xBE) == 0xBE)))) \
433 || ((*((s) + 2) == 0xBF \
434 && (*((s) + 3) & 0xBE) == 0xBE \
435 /* Excludes things like U+10FFE = \xF0\x90\xBF\xBE */ \
436 && (*((s) + 1) & 0x8F) == 0x8F)))
437#endif
438
c867b360
JH		 439#define UNICODE_SURROGATE_FIRST 0xD800
440#define UNICODE_SURROGATE_LAST 0xDFFF
441#define UNICODE_REPLACEMENT 0xFFFD
442#define UNICODE_BYTE_ORDER_MARK 0xFEFF
1d72bdf6 443
b851fbc1 444/* Though our UTF-8 encoding can go beyond this,
c76687c5 445 * let's be conservative and do as Unicode says. */
b851fbc1
JH		 446#define PERL_UNICODE_MAX 0x10FFFF
447
949cf498
KW		 448#define UNICODE_WARN_SURROGATE 0x0001 /* UTF-16 surrogates */
449#define UNICODE_WARN_NONCHAR 0x0002 /* Non-char code points */
450#define UNICODE_WARN_SUPER 0x0004 /* Above 0x10FFFF */
451#define UNICODE_WARN_FE_FF 0x0008 /* Above 0x10FFFF */
452#define UNICODE_DISALLOW_SURROGATE 0x0010
453#define UNICODE_DISALLOW_NONCHAR 0x0020
454#define UNICODE_DISALLOW_SUPER 0x0040
455#define UNICODE_DISALLOW_FE_FF 0x0080
456#define UNICODE_WARN_ILLEGAL_INTERCHANGE \
457 (UNICODE_WARN_SURROGATE|UNICODE_WARN_NONCHAR|UNICODE_WARN_SUPER)
458#define UNICODE_DISALLOW_ILLEGAL_INTERCHANGE \
459 (UNICODE_DISALLOW_SURROGATE|UNICODE_DISALLOW_NONCHAR|UNICODE_DISALLOW_SUPER)
460
461/* For backward source compatibility, as are now the default */
462#define UNICODE_ALLOW_SURROGATE 0
463#define UNICODE_ALLOW_SUPER 0
464#define UNICODE_ALLOW_ANY 0
b851fbc1 465
1d72bdf6
NIS		 466#define UNICODE_IS_SURROGATE(c) ((c) >= UNICODE_SURROGATE_FIRST && \
467 (c) <= UNICODE_SURROGATE_LAST)
a10ec373 468#define UNICODE_IS_REPLACEMENT(c) ((c) == UNICODE_REPLACEMENT)
872c91ae 469#define UNICODE_IS_BYTE_ORDER_MARK(c) ((c) == UNICODE_BYTE_ORDER_MARK)
7131f24d
KW		 470#define UNICODE_IS_NONCHAR(c) ((c >= 0xFDD0 && c <= 0xFDEF) \
471 /* The other noncharacters end in FFFE or FFFF, which \
472 * the mask below catches both of, but beyond the last \
473 * official unicode code point, they aren't \
474 * noncharacters, since those aren't Unicode \
475 * characters at all */ \
476 || ((((c & 0xFFFE) == 0xFFFE)) && ! UNICODE_IS_SUPER(c)))
477#define UNICODE_IS_SUPER(c) ((c) > PERL_UNICODE_MAX)
478#define UNICODE_IS_FE_FF(c) ((c) > 0x7FFFFFFF)
1d72bdf6 479
f067b878
NA		 480#ifdef HAS_QUAD
481# define UTF8_QUAD_MAX UINT64_C(0x1000000000)
482#endif
3bd709b1 483
09091399
JH		 484#define UNICODE_GREEK_CAPITAL_LETTER_SIGMA 0x03A3
485#define UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA 0x03C2
486#define UNICODE_GREEK_SMALL_LETTER_SIGMA 0x03C3
9dcbe121 487#define GREEK_SMALL_LETTER_MU 0x03BC
78a0d3cc
KW		 488#define GREEK_CAPITAL_LETTER_MU 0x039C /* Upper and title case of MICRON */
489#define LATIN_CAPITAL_LETTER_Y_WITH_DIAERESIS 0x0178 /* Also is title case */
97298f37 490#define LATIN_CAPITAL_LETTER_SHARP_S 0x1E9E
8d64d87f
KW		 491#define LATIN_SMALL_LETTER_LONG_S 0x017F
492#define KELVIN_SIGN 0x212A
493#define ANGSTROM_SIGN 0x212B
09091399 494
9e55ce06 495#define UNI_DISPLAY_ISPRINT 0x0001
c728cb41
JH		 496#define UNI_DISPLAY_BACKSLASH 0x0002
497#define UNI_DISPLAY_QQ (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
498#define UNI_DISPLAY_REGEX (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
9e55ce06 499
5cd46e1f
KW		 500#ifndef EBCDIC
501# define LATIN_SMALL_LETTER_SHARP_S 0x00DF
502# define LATIN_SMALL_LETTER_Y_WITH_DIAERESIS 0x00FF
503# define MICRO_SIGN 0x00B5
f508a607
KW		 504# define LATIN_CAPITAL_LETTER_A_WITH_RING_ABOVE 0x00C5
505# define LATIN_SMALL_LETTER_A_WITH_RING_ABOVE 0x00E5
5cd46e1f
KW		 506#endif
507
508#define ANYOF_FOLD_SHARP_S(node, input, end) \
509 (ANYOF_BITMAP_TEST(node, LATIN_SMALL_LETTER_SHARP_S) && \
137165a6 510 (ANYOF_NONBITMAP(node)) && \
39065660 511 (ANYOF_FLAGS(node) & ANYOF_LOC_NONBITMAP_FOLD) && \
07b6858f
JH		 512 ((end) > (input) + 1) && \
513 toLOWER((input)[0]) == 's' && \
514 toLOWER((input)[1]) == 's')
ebc501f0 515#define SHARP_S_SKIP 2
3b0fc154 516
2f454f11 517#ifndef EBCDIC
a4f7a67c
KW		 518/* If you want to exclude surrogates, and beyond legal Unicode, see the blame
519 * log for earlier versions which gave details for these */
c78f6c49 520# define IS_UTF8_CHAR_1(p) \
3b0fc154 521 ((p)[0] <= 0x7F)
c78f6c49 522# define IS_UTF8_CHAR_2(p) \
3b0fc154
JH		 523 ((p)[0] >= 0xC2 && (p)[0] <= 0xDF && \
524 (p)[1] >= 0x80 && (p)[1] <= 0xBF)
c78f6c49 525# define IS_UTF8_CHAR_3a(p) \
3b0fc154
JH		 526 ((p)[0] == 0xE0 && \
527 (p)[1] >= 0xA0 && (p)[1] <= 0xBF && \
528 (p)[2] >= 0x80 && (p)[2] <= 0xBF)
c78f6c49 529# define IS_UTF8_CHAR_3b(p) \
a4f7a67c 530 ((p)[0] >= 0xE1 && (p)[0] <= 0xEF && \
3b0fc154
JH		 531 (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
532 (p)[2] >= 0x80 && (p)[2] <= 0xBF)
c78f6c49 533# define IS_UTF8_CHAR_4a(p) \
3b0fc154
JH		 534 ((p)[0] == 0xF0 && \
535 (p)[1] >= 0x90 && (p)[1] <= 0xBF && \
536 (p)[2] >= 0x80 && (p)[2] <= 0xBF && \
537 (p)[3] >= 0x80 && (p)[3] <= 0xBF)
a4f7a67c 538/* The 0xF7 allows us to go to 0x1fffff (0x200000 would
3b0fc154
JH		 539 * require five bytes). Not doing any further code points
540 * since that is not needed (and that would not be strict
541 * UTF-8, anyway). The "slow path" in Perl_is_utf8_char()
542 * will take care of the "extended UTF-8". */
a4f7a67c
KW		 543# define IS_UTF8_CHAR_4b(p) \
544 ((p)[0] >= 0xF1 && (p)[0] <= 0xF7 && \
3b0fc154
JH		 545 (p)[1] >= 0x80 && (p)[1] <= 0xBF && \
546 (p)[2] >= 0x80 && (p)[2] <= 0xBF && \
547 (p)[3] >= 0x80 && (p)[3] <= 0xBF)
548
c78f6c49 549# define IS_UTF8_CHAR_3(p) \
3b0fc154 550 (IS_UTF8_CHAR_3a(p) || \
a4f7a67c 551 IS_UTF8_CHAR_3b(p))
c78f6c49 552# define IS_UTF8_CHAR_4(p) \
3b0fc154 553 (IS_UTF8_CHAR_4a(p) || \
a4f7a67c 554 IS_UTF8_CHAR_4b(p))
3b0fc154
JH		 555
556/* IS_UTF8_CHAR(p) is strictly speaking wrong (not UTF-8) because it
557 * (1) allows UTF-8 encoded UTF-16 surrogates
558 * (2) it allows code points past U+10FFFF.
559 * The Perl_is_utf8_char() full "slow" code will handle the Perl
560 * "extended UTF-8". */
c78f6c49 561# define IS_UTF8_CHAR(p, n) \
3b0fc154
JH		 562 ((n) == 1 ? IS_UTF8_CHAR_1(p) : \
563 (n) == 2 ? IS_UTF8_CHAR_2(p) : \
564 (n) == 3 ? IS_UTF8_CHAR_3(p) : \
565 (n) == 4 ? IS_UTF8_CHAR_4(p) : 0)
566
c78f6c49 567# define IS_UTF8_CHAR_FAST(n) ((n) <= 4)
768c67ee 568
2f454f11
KW		 569#else /* EBCDIC */
570
571/* This is an attempt to port IS_UTF8_CHAR to EBCDIC based on eyeballing.
572 * untested. If want to exclude surrogates and above-Unicode, see the
573 * definitions for UTF8_IS_SURROGATE and UTF8_IS_SUPER */
574# define IS_UTF8_CHAR_1(p) \
575 (NATIVE_TO_ASCII((p)[0]) <= 0x9F)
576# define IS_UTF8_CHAR_2(p) \
577 (NATIVE_TO_I8((p)[0]) >= 0xC5 && NATIVE_TO_I8((p)[0]) <= 0xDF && \
578 NATIVE_TO_I8((p)[1]) >= 0xA0 && NATIVE_TO_I8((p)[1]) <= 0xBF)
579# define IS_UTF8_CHAR_3(p) \
580 (NATIVE_TO_I8((p)[0]) == 0xE1 && NATIVE_TO_I8((p)[1]) <= 0xEF && \
581 NATIVE_TO_I8((p)[1]) >= 0xA0 && NATIVE_TO_I8((p)[1]) <= 0xBF && \
582 NATIVE_TO_I8((p)[2]) >= 0xA0 && NATIVE_TO_I8((p)[2]) <= 0xBF)
583# define IS_UTF8_CHAR_4a(p) \
584 (NATIVE_TO_I8((p)[0]) == 0xF0 && \
585 NATIVE_TO_I8((p)[1]) >= 0xB0 && NATIVE_TO_I8((p)[1]) <= 0xBF && \
586 NATIVE_TO_I8((p)[2]) >= 0xA0 && NATIVE_TO_I8((p)[2]) <= 0xBF && \
587 NATIVE_TO_I8((p)[3]) >= 0xA0 && NATIVE_TO_I8((p)[3]) <= 0xBF)
588# define IS_UTF8_CHAR_4b(p) \
589 (NATIVE_TO_I8((p)[0]) >= 0xF1 && NATIVE_TO_I8((p)[0]) <= 0xF7 && \
590 NATIVE_TO_I8((p)[1]) >= 0xA0 && NATIVE_TO_I8((p)[1]) <= 0xBF && \
591 NATIVE_TO_I8((p)[2]) >= 0xA0 && NATIVE_TO_I8((p)[2]) <= 0xBF && \
592 NATIVE_TO_I8((p)[3]) >= 0xA0 && NATIVE_TO_I8((p)[3]) <= 0xBF)
593# define IS_UTF8_CHAR_5a(p) \
594 (NATIVE_TO_I8((p)[0]) == 0xF8 && \
595 NATIVE_TO_I8((p)[1]) >= 0xA8 && NATIVE_TO_I8((p)[1]) <= 0xBF && \
596 NATIVE_TO_I8((p)[1]) >= 0xA0 && NATIVE_TO_I8((p)[1]) <= 0xBF && \
597 NATIVE_TO_I8((p)[2]) >= 0xA0 && NATIVE_TO_I8((p)[2]) <= 0xBF && \
598 NATIVE_TO_I8((p)[3]) >= 0xA0 && NATIVE_TO_I8((p)[3]) <= 0xBF)
599# define IS_UTF8_CHAR_5b(p) \
600 (NATIVE_TO_I8((p)[0]) >= 0xF9 && NATIVE_TO_I8((p)[1]) <= 0xFB && \
601 NATIVE_TO_I8((p)[1]) >= 0xA0 && NATIVE_TO_I8((p)[1]) <= 0xBF && \
602 NATIVE_TO_I8((p)[1]) >= 0xA0 && NATIVE_TO_I8((p)[1]) <= 0xBF && \
603 NATIVE_TO_I8((p)[2]) >= 0xA0 && NATIVE_TO_I8((p)[2]) <= 0xBF && \
604 NATIVE_TO_I8((p)[3]) >= 0xA0 && NATIVE_TO_I8((p)[3]) <= 0xBF)
605
606# define IS_UTF8_CHAR_4(p) \
607 (IS_UTF8_CHAR_4a(p) || \
608 IS_UTF8_CHAR_4b(p))
609# define IS_UTF8_CHAR_5(p) \
610 (IS_UTF8_CHAR_5a(p) || \
611 IS_UTF8_CHAR_5b(p))
612# define IS_UTF8_CHAR(p, n) \
613 ((n) == 1 ? IS_UTF8_CHAR_1(p) : \
614 (n) == 2 ? IS_UTF8_CHAR_2(p) : \
615 (n) == 3 ? IS_UTF8_CHAR_3(p) : \
616 (n) == 4 ? IS_UTF8_CHAR_4(p) : \
617 (n) == 5 ? IS_UTF8_CHAR_5(p) : 0)
618
619# define IS_UTF8_CHAR_FAST(n) ((n) <= 5)
620
77263263 621#endif /* IS_UTF8_CHAR() for UTF-8 */
e9a8c099
MHM		 622
623/*
624 * Local variables:
625 * c-indentation-style: bsd
626 * c-basic-offset: 4
14d04a33 627 * indent-tabs-mode: nil
e9a8c099
MHM		 628 * End:
629 *
14d04a33 630 * ex: set ts=8 sts=4 sw=4 et:
e9a8c099 631 */
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