This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
https://perl5.git.perl.org / perl5.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
regcomp.h: Create FILL_NODE macro and use it
[perl5.git] / utf8.h
... / ...
CommitLineData
1/* utf8.h
2 *
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 *
9 * Copyright (C) 2000, 2001, 2002, 2005, 2006, 2007, 2009,
10 * 2010, 2011 by Larry Wall and others
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
17#ifndef PERL_UTF8_H_ /* Guard against recursive inclusion */
18#define PERL_UTF8_H_ 1
19
20/* Use UTF-8 as the default script encoding?
21 * Turning this on will break scripts having non-UTF-8 binary
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
29#include "regcharclass.h"
30#include "unicode_constants.h"
31
32/* For to_utf8_fold_flags, q.v. */
33#define FOLD_FLAGS_LOCALE 0x1
34#define FOLD_FLAGS_FULL 0x2
35#define FOLD_FLAGS_NOMIX_ASCII 0x4
36
37/* For _core_swash_init(), internal core use only */
38#define _CORE_SWASH_INIT_USER_DEFINED_PROPERTY 0x1
39#define _CORE_SWASH_INIT_RETURN_IF_UNDEF 0x2
40#define _CORE_SWASH_INIT_ACCEPT_INVLIST 0x4
41
42/*
43=head1 Unicode Support
44L<perlguts/Unicode Support> has an introduction to this API.
45
46See also L</Character classification>,
47and L</Character case changing>.
48Various functions outside this section also work specially with Unicode.
49Search for the string "utf8" in this document.
50
51=for apidoc is_ascii_string
52
53This is a misleadingly-named synonym for L</is_utf8_invariant_string>.
54On ASCII-ish platforms, the name isn't misleading: the ASCII-range characters
55are exactly the UTF-8 invariants. But EBCDIC machines have more invariants
56than just the ASCII characters, so C<is_utf8_invariant_string> is preferred.
57
58=for apidoc is_invariant_string
59
60This is a somewhat misleadingly-named synonym for L</is_utf8_invariant_string>.
61C<is_utf8_invariant_string> is preferred, as it indicates under what conditions
62the string is invariant.
63
64=cut
65*/
66#define is_ascii_string(s, len) is_utf8_invariant_string(s, len)
67#define is_invariant_string(s, len) is_utf8_invariant_string(s, len)
68
69#define uvoffuni_to_utf8_flags(d,uv,flags) \
70 uvoffuni_to_utf8_flags_msgs(d, uv, flags, 0)
71#define uvchr_to_utf8(a,b) uvchr_to_utf8_flags(a,b,0)
72#define uvchr_to_utf8_flags(d,uv,flags) \
73 uvchr_to_utf8_flags_msgs(d,uv,flags, 0)
74#define uvchr_to_utf8_flags_msgs(d,uv,flags,msgs) \
75 uvoffuni_to_utf8_flags_msgs(d,NATIVE_TO_UNI(uv),flags, msgs)
76#define utf8_to_uvchr_buf(s, e, lenp) \
77 (__ASSERT_((U8*) (e) > (U8*) (s)) \
78 utf8n_to_uvchr(s, (U8*)(e) - (U8*)(s), lenp, \
79 ckWARN_d(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY))
80#define utf8n_to_uvchr(s, len, lenp, flags) \
81 utf8n_to_uvchr_error(s, len, lenp, flags, 0)
82#define utf8n_to_uvchr_error(s, len, lenp, flags, errors) \
83 utf8n_to_uvchr_msgs(s, len, lenp, flags, errors, 0)
84
85#define to_uni_fold(c, p, lenp) _to_uni_fold_flags(c, p, lenp, FOLD_FLAGS_FULL)
86
87#define to_utf8_fold(s, r, lenr) \
88 _to_utf8_fold_flags (s, NULL, r, lenr, FOLD_FLAGS_FULL, __FILE__, __LINE__)
89#define to_utf8_lower(s, r, lenr) \
90 _to_utf8_lower_flags(s, NULL, r ,lenr, 0, __FILE__, __LINE__)
91#define to_utf8_upper(s, r, lenr) \
92 _to_utf8_upper_flags(s, NULL, r, lenr, 0, __FILE__, __LINE__)
93#define to_utf8_title(s, r, lenr) \
94 _to_utf8_title_flags(s, NULL, r, lenr ,0, __FILE__, __LINE__)
95
96#define foldEQ_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2) \
97 foldEQ_utf8_flags(s1, pe1, l1, u1, s2, pe2, l2, u2, 0)
98#define FOLDEQ_UTF8_NOMIX_ASCII (1 << 0)
99#define FOLDEQ_LOCALE (1 << 1)
100#define FOLDEQ_S1_ALREADY_FOLDED (1 << 2)
101#define FOLDEQ_S2_ALREADY_FOLDED (1 << 3)
102#define FOLDEQ_S1_FOLDS_SANE (1 << 4)
103#define FOLDEQ_S2_FOLDS_SANE (1 << 5)
104
105#define ibcmp_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2) \
106 cBOOL(! foldEQ_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2))
107
108#ifdef EBCDIC
109/* The equivalent of these macros but implementing UTF-EBCDIC
110 are in the following header file:
111 */
112
113#include "utfebcdic.h"
114
115#else /* ! EBCDIC */
116START_EXTERN_C
117
118/* How wide can a single UTF-8 encoded character become in bytes. */
119/* NOTE: Strictly speaking Perl's UTF-8 should not be called UTF-8 since UTF-8
120 * is an encoding of Unicode, and Unicode's upper limit, 0x10FFFF, can be
121 * expressed with 4 bytes. However, Perl thinks of UTF-8 as a way to encode
122 * non-negative integers in a binary format, even those above Unicode */
123#define UTF8_MAXBYTES 13
124
125#ifdef DOINIT
126EXTCONST unsigned char PL_utf8skip[] = {
127/* 0x00 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
128/* 0x10 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
129/* 0x20 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
130/* 0x30 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
131/* 0x40 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
132/* 0x50 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
133/* 0x60 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
134/* 0x70 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
135/* 0x80 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */
136/* 0x90 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */
137/* 0xA0 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */
138/* 0xB0 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */
139/* 0xC0 */ 2,2, /* overlong */
140/* 0xC2 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* U+0080 to U+03FF */
141/* 0xD0 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* U+0400 to U+07FF */
142/* 0xE0 */ 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, /* U+0800 to U+FFFF */
143/* 0xF0 */ 4,4,4,4,4,4,4,4,5,5,5,5,6,6, /* above BMP to 2**31 - 1 */
144 /* Perl extended (never was official UTF-8). Up to 36 bit */
145/* 0xFE */ 7,
146 /* More extended, Up to 72 bits (64-bit + reserved) */
147/* 0xFF */ UTF8_MAXBYTES
148};
149#else
150EXTCONST unsigned char PL_utf8skip[];
151#endif
152
153END_EXTERN_C
154
155#if defined(_MSC_VER) && _MSC_VER < 1400
156/* older MSVC versions have a smallish macro buffer */
157#define PERL_SMALL_MACRO_BUFFER
158#endif
159
160/* Native character to/from iso-8859-1. Are the identity functions on ASCII
161 * platforms */
162#ifdef PERL_SMALL_MACRO_BUFFER
163#define NATIVE_TO_LATIN1(ch) ((U8)(ch))
164#define LATIN1_TO_NATIVE(ch) ((U8)(ch))
165#else
166#define NATIVE_TO_LATIN1(ch) (__ASSERT_(FITS_IN_8_BITS(ch)) ((U8) (ch)))
167#define LATIN1_TO_NATIVE(ch) (__ASSERT_(FITS_IN_8_BITS(ch)) ((U8) (ch)))
168#endif
169
170/* I8 is an intermediate version of UTF-8 used only in UTF-EBCDIC. We thus
171 * consider it to be identical to UTF-8 on ASCII platforms. Strictly speaking
172 * UTF-8 and UTF-EBCDIC are two different things, but we often conflate them
173 * because they are 8-bit encodings that serve the same purpose in Perl, and
174 * rarely do we need to distinguish them. The term "NATIVE_UTF8" applies to
175 * whichever one is applicable on the current platform */
176#ifdef PERL_SMALL_MACRO_BUFFER
177#define NATIVE_UTF8_TO_I8(ch) ((U8) (ch))
178#define I8_TO_NATIVE_UTF8(ch) ((U8) (ch))
179#else
180#define NATIVE_UTF8_TO_I8(ch) (__ASSERT_(FITS_IN_8_BITS(ch)) ((U8) (ch)))
181#define I8_TO_NATIVE_UTF8(ch) (__ASSERT_(FITS_IN_8_BITS(ch)) ((U8) (ch)))
182#endif
183
184/* Transforms in wide UV chars */
185#define UNI_TO_NATIVE(ch) ((UV) (ch))
186#define NATIVE_TO_UNI(ch) ((UV) (ch))
187
188/*
189
190 The following table is from Unicode 3.2, plus the Perl extensions for above
191 U+10FFFF
192
193 Code Points 1st Byte 2nd Byte 3rd 4th 5th 6th 7th 8th-13th
194
195 U+0000..U+007F 00..7F
196 U+0080..U+07FF * C2..DF 80..BF
197 U+0800..U+0FFF E0 * A0..BF 80..BF
198 U+1000..U+CFFF E1..EC 80..BF 80..BF
199 U+D000..U+D7FF ED 80..9F 80..BF
200 U+D800..U+DFFF ED A0..BF 80..BF (surrogates)
201 U+E000..U+FFFF EE..EF 80..BF 80..BF
202 U+10000..U+3FFFF F0 * 90..BF 80..BF 80..BF
203 U+40000..U+FFFFF F1..F3 80..BF 80..BF 80..BF
204 U+100000..U+10FFFF F4 80..8F 80..BF 80..BF
205 Below are above-Unicode code points
206 U+110000..U+13FFFF F4 90..BF 80..BF 80..BF
207 U+110000..U+1FFFFF F5..F7 80..BF 80..BF 80..BF
208 U+200000..U+FFFFFF F8 * 88..BF 80..BF 80..BF 80..BF
209U+1000000..U+3FFFFFF F9..FB 80..BF 80..BF 80..BF 80..BF
210U+4000000..U+3FFFFFFF FC * 84..BF 80..BF 80..BF 80..BF 80..BF
211U+40000000..U+7FFFFFFF FD 80..BF 80..BF 80..BF 80..BF 80..BF
212U+80000000..U+FFFFFFFFF FE * 82..BF 80..BF 80..BF 80..BF 80..BF 80..BF
213U+1000000000.. FF 80..BF 80..BF 80..BF 80..BF 80..BF * 81..BF 80..BF
214
215Note the gaps before several of the byte entries above marked by '*'. These are
216caused by legal UTF-8 avoiding non-shortest encodings: it is technically
217possible to UTF-8-encode a single code point in different ways, but that is
218explicitly forbidden, and the shortest possible encoding should always be used
219(and that is what Perl does). The non-shortest ones are called 'overlongs'.
220
221 */
222
223/*
224 Another way to look at it, as bits:
225
226 Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
227
228 0aaa aaaa 0aaa aaaa
229 0000 0bbb bbaa aaaa 110b bbbb 10aa aaaa
230 cccc bbbb bbaa aaaa 1110 cccc 10bb bbbb 10aa aaaa
231 00 000d ddcc cccc bbbb bbaa aaaa 1111 0ddd 10cc cccc 10bb bbbb 10aa aaaa
232
233As you can see, the continuation bytes all begin with C<10>, and the
234leading bits of the start byte tell how many bytes there are in the
235encoded character.
236
237Perl's extended UTF-8 means we can have start bytes up through FF, though any
238beginning with FF yields a code point that is too large for 32-bit ASCII
239platforms. FF signals to use 13 bytes for the encoded character. This breaks
240the paradigm that the number of leading bits gives how many total bytes there
241are in the character.
242
243*/
244
245/* Is the representation of the Unicode code point 'cp' the same regardless of
246 * being encoded in UTF-8 or not? */
247#define OFFUNI_IS_INVARIANT(cp) isASCII(cp)
248
249/*
250=for apidoc Am|bool|UVCHR_IS_INVARIANT|UV cp
251
252Evaluates to 1 if the representation of code point C<cp> is the same whether or
253not it is encoded in UTF-8; otherwise evaluates to 0. UTF-8 invariant
254characters can be copied as-is when converting to/from UTF-8, saving time.
255C<cp> is Unicode if above 255; otherwise is platform-native.
256
257=cut
258 */
259
260#define UVCHR_IS_INVARIANT(cp) OFFUNI_IS_INVARIANT(cp)
261
262/* This defines the bits that are to be in the continuation bytes of a multi-byte
263 * UTF-8 encoded character that mark it is a continuation byte. */
264#define UTF_CONTINUATION_MARK 0x80
265
266/* Misleadingly named: is the UTF8-encoded byte 'c' part of a variant sequence
267 * in UTF-8? This is the inverse of UTF8_IS_INVARIANT. The |0 makes sure this
268 * isn't mistakenly called with a ptr argument */
269#define UTF8_IS_CONTINUED(c) (__ASSERT_(FITS_IN_8_BITS(c)) \
270 ((U8)((c) | 0)) & UTF_CONTINUATION_MARK)
271
272/* Is the byte 'c' the first byte of a multi-byte UTF8-8 encoded sequence?
273 * This doesn't catch invariants (they are single-byte). It also excludes the
274 * illegal overlong sequences that begin with C0 and C1. The |0 makes sure
275 * this isn't mistakenly called with a ptr argument */
276#define UTF8_IS_START(c) (__ASSERT_(FITS_IN_8_BITS(c)) \
277 ((U8)((c) | 0)) >= 0xc2)
278
279/* For use in UTF8_IS_CONTINUATION() below */
280#define UTF_IS_CONTINUATION_MASK 0xC0
281
282/* Is the byte 'c' part of a multi-byte UTF8-8 encoded sequence, and not the
283 * first byte thereof? The |0 makes sure this isn't mistakenly called with a
284 * ptr argument */
285#define UTF8_IS_CONTINUATION(c) (__ASSERT_(FITS_IN_8_BITS(c)) \
286 (((U8)((c) | 0)) & UTF_IS_CONTINUATION_MASK) == UTF_CONTINUATION_MARK)
287
288/* Is the UTF8-encoded byte 'c' the first byte of a two byte sequence? Use
289 * UTF8_IS_NEXT_CHAR_DOWNGRADEABLE() instead if the input isn't known to
290 * be well-formed. Masking with 0xfe allows the low bit to be 0 or 1; thus
291 * this matches 0xc[23]. The |0 makes sure this isn't mistakenly called with a
292 * ptr argument */
293#define UTF8_IS_DOWNGRADEABLE_START(c) (__ASSERT_(FITS_IN_8_BITS(c)) \
294 (((U8)((c) | 0)) & 0xfe) == 0xc2)
295
296/* Is the UTF8-encoded byte 'c' the first byte of a sequence of bytes that
297 * represent a code point > 255? The |0 makes sure this isn't mistakenly
298 * called with a ptr argument */
299#define UTF8_IS_ABOVE_LATIN1(c) (__ASSERT_(FITS_IN_8_BITS(c)) \
300 ((U8)((c) | 0)) >= 0xc4)
301
302/* This is the number of low-order bits a continuation byte in a UTF-8 encoded
303 * sequence contributes to the specification of the code point. In the bit
304 * maps above, you see that the first 2 bits are a constant '10', leaving 6 of
305 * real information */
306#define UTF_ACCUMULATION_SHIFT 6
307
308/* ^? is defined to be DEL on ASCII systems. See the definition of toCTRL()
309 * for more */
310#define QUESTION_MARK_CTRL DEL_NATIVE
311
312/* Surrogates, non-character code points and above-Unicode code points are
313 * problematic in some contexts. This allows code that needs to check for
314 * those to to quickly exclude the vast majority of code points it will
315 * encounter */
316#define isUTF8_POSSIBLY_PROBLEMATIC(c) (__ASSERT_(FITS_IN_8_BITS(c)) \
317 (U8) c >= 0xED)
318
319#define UNICODE_IS_PERL_EXTENDED(uv) UNLIKELY((UV) (uv) > 0x7FFFFFFF)
320
321#endif /* EBCDIC vs ASCII */
322
323/* 2**UTF_ACCUMULATION_SHIFT - 1 */
324#define UTF_CONTINUATION_MASK ((U8) ((1U << UTF_ACCUMULATION_SHIFT) - 1))
325
326/* Internal macro to be used only in this file to aid in constructing other
327 * publicly accessible macros.
328 * The number of bytes required to express this uv in UTF-8, for just those
329 * uv's requiring 2 through 6 bytes, as these are common to all platforms and
330 * word sizes. The number of bytes needed is given by the number of leading 1
331 * bits in the start byte. There are 32 start bytes that have 2 initial 1 bits
332 * (C0-DF); there are 16 that have 3 initial 1 bits (E0-EF); 8 that have 4
333 * initial 1 bits (F0-F8); 4 that have 5 initial 1 bits (F9-FB), and 2 that
334 * have 6 initial 1 bits (FC-FD). The largest number a string of n bytes can
335 * represent is (the number of possible start bytes for 'n')
336 * * (the number of possiblities for each start byte
337 * The latter in turn is
338 * 2 ** ( (how many continuation bytes there are)
339 * * (the number of bits of information each
340 * continuation byte holds))
341 *
342 * If we were on a platform where we could use a fast find first set bit
343 * instruction (or count leading zeros instruction) this could be replaced by
344 * using that to find the log2 of the uv, and divide that by the number of bits
345 * of information in each continuation byte, adjusting for large cases and how
346 * much information is in a start byte for that length */
347#define __COMMON_UNI_SKIP(uv) \
348 (UV) (uv) < (32 * (1U << ( UTF_ACCUMULATION_SHIFT))) ? 2 : \
349 (UV) (uv) < (16 * (1U << (2 * UTF_ACCUMULATION_SHIFT))) ? 3 : \
350 (UV) (uv) < ( 8 * (1U << (3 * UTF_ACCUMULATION_SHIFT))) ? 4 : \
351 (UV) (uv) < ( 4 * (1U << (4 * UTF_ACCUMULATION_SHIFT))) ? 5 : \
352 (UV) (uv) < ( 2 * (1U << (5 * UTF_ACCUMULATION_SHIFT))) ? 6 :
353
354/* Internal macro to be used only in this file.
355 * This adds to __COMMON_UNI_SKIP the details at this platform's upper range.
356 * For any-sized EBCDIC platforms, or 64-bit ASCII ones, we need one more test
357 * to see if just 7 bytes is needed, or if the maximum is needed. For 32-bit
358 * ASCII platforms, everything is representable by 7 bytes */
359#if defined(UV_IS_QUAD) || defined(EBCDIC)
360# define __BASE_UNI_SKIP(uv) (__COMMON_UNI_SKIP(uv) \
361 (UV) (uv) < ((UV) 1U << (6 * UTF_ACCUMULATION_SHIFT)) ? 7 : UTF8_MAXBYTES)
362#else
363# define __BASE_UNI_SKIP(uv) (__COMMON_UNI_SKIP(uv) 7)
364#endif
365
366/* The next two macros use the base macro defined above, and add in the tests
367 * at the low-end of the range, for just 1 byte, yielding complete macros,
368 * publicly accessible. */
369
370/* Input is a true Unicode (not-native) code point */
371#define OFFUNISKIP(uv) (OFFUNI_IS_INVARIANT(uv) ? 1 : __BASE_UNI_SKIP(uv))
372
373/*
374
375=for apidoc Am|STRLEN|UVCHR_SKIP|UV cp
376returns the number of bytes required to represent the code point C<cp> when
377encoded as UTF-8. C<cp> is a native (ASCII or EBCDIC) code point if less than
378255; a Unicode code point otherwise.
379
380=cut
381 */
382#define UVCHR_SKIP(uv) ( UVCHR_IS_INVARIANT(uv) ? 1 : __BASE_UNI_SKIP(uv))
383
384/* The largest code point representable by two UTF-8 bytes on this platform.
385 * As explained in the comments for __COMMON_UNI_SKIP, 32 start bytes with
386 * UTF_ACCUMULATION_SHIFT bits of information each */
387#define MAX_UTF8_TWO_BYTE (32 * (1U << UTF_ACCUMULATION_SHIFT) - 1)
388
389/* The largest code point representable by two UTF-8 bytes on any platform that
390 * Perl runs on. This value is constrained by EBCDIC which has 5 bits per
391 * continuation byte */
392#define MAX_PORTABLE_UTF8_TWO_BYTE (32 * (1U << 5) - 1)
393
394/* The maximum number of UTF-8 bytes a single Unicode character can
395 * uppercase/lowercase/fold into. Unicode guarantees that the maximum
396 * expansion is UTF8_MAX_FOLD_CHAR_EXPAND characters, but any above-Unicode
397 * code point will fold to itself, so we only have to look at the expansion of
398 * the maximum Unicode code point. But this number may be less than the space
399 * occupied by a very large code point under Perl's extended UTF-8. We have to
400 * make it large enough to fit any single character. (It turns out that ASCII
401 * and EBCDIC differ in which is larger) */
402#define UTF8_MAXBYTES_CASE \
403 (UTF8_MAXBYTES >= (UTF8_MAX_FOLD_CHAR_EXPAND * OFFUNISKIP(0x10FFFF)) \
404 ? UTF8_MAXBYTES \
405 : (UTF8_MAX_FOLD_CHAR_EXPAND * OFFUNISKIP(0x10FFFF)))
406
407/* Rest of these are attributes of Unicode and perl's internals rather than the
408 * encoding, or happen to be the same in both ASCII and EBCDIC (at least at
409 * this level; the macros that some of these call may have different
410 * definitions in the two encodings */
411
412/* In domain restricted to ASCII, these may make more sense to the reader than
413 * the ones with Latin1 in the name */
414#define NATIVE_TO_ASCII(ch) NATIVE_TO_LATIN1(ch)
415#define ASCII_TO_NATIVE(ch) LATIN1_TO_NATIVE(ch)
416
417/* More or less misleadingly-named defines, retained for back compat */
418#define NATIVE_TO_UTF(ch) NATIVE_UTF8_TO_I8(ch)
419#define NATIVE_TO_I8(ch) NATIVE_UTF8_TO_I8(ch)
420#define UTF_TO_NATIVE(ch) I8_TO_NATIVE_UTF8(ch)
421#define I8_TO_NATIVE(ch) I8_TO_NATIVE_UTF8(ch)
422#define NATIVE8_TO_UNI(ch) NATIVE_TO_LATIN1(ch)
423
424/* This defines the 1-bits that are to be in the first byte of a multi-byte
425 * UTF-8 encoded character that mark it as a start byte and give the number of
426 * bytes that comprise the character. 'len' is the number of bytes in the
427 * multi-byte sequence. */
428#define UTF_START_MARK(len) (((len) > 7) ? 0xFF : (0xFF & (0xFE << (7-(len)))))
429
430/* Masks out the initial one bits in a start byte, leaving the real data ones.
431 * Doesn't work on an invariant byte. 'len' is the number of bytes in the
432 * multi-byte sequence that comprises the character. */
433#define UTF_START_MASK(len) (((len) >= 7) ? 0x00 : (0x1F >> ((len)-2)))
434
435/* Adds a UTF8 continuation byte 'new' of information to a running total code
436 * point 'old' of all the continuation bytes so far. This is designed to be
437 * used in a loop to convert from UTF-8 to the code point represented. Note
438 * that this is asymmetric on EBCDIC platforms, in that the 'new' parameter is
439 * the UTF-EBCDIC byte, whereas the 'old' parameter is a Unicode (not EBCDIC)
440 * code point in process of being generated */
441#define UTF8_ACCUMULATE(old, new) (__ASSERT_(FITS_IN_8_BITS(new)) \
442 ((old) << UTF_ACCUMULATION_SHIFT) \
443 | ((NATIVE_UTF8_TO_I8((U8)new)) \
444 & UTF_CONTINUATION_MASK))
445
446/* This works in the face of malformed UTF-8. */
447#define UTF8_IS_NEXT_CHAR_DOWNGRADEABLE(s, e) \
448 ( UTF8_IS_DOWNGRADEABLE_START(*(s)) \
449 && ( (e) - (s) > 1) \
450 && UTF8_IS_CONTINUATION(*((s)+1)))
451
452/* Number of bytes a code point occupies in UTF-8. */
453#define NATIVE_SKIP(uv) UVCHR_SKIP(uv)
454
455/* Most code which says UNISKIP is really thinking in terms of native code
456 * points (0-255) plus all those beyond. This is an imprecise term, but having
457 * it means existing code continues to work. For precision, use UVCHR_SKIP,
458 * NATIVE_SKIP, or OFFUNISKIP */
459#define UNISKIP(uv) UVCHR_SKIP(uv)
460
461/* Longer, but more accurate name */
462#define UTF8_IS_ABOVE_LATIN1_START(c) UTF8_IS_ABOVE_LATIN1(c)
463
464/* Convert a UTF-8 variant Latin1 character to a native code point value.
465 * Needs just one iteration of accumulate. Should be used only if it is known
466 * that the code point is < 256, and is not UTF-8 invariant. Use the slower
467 * but more general TWO_BYTE_UTF8_TO_NATIVE() which handles any code point
468 * representable by two bytes (which turns out to be up through
469 * MAX_PORTABLE_UTF8_TWO_BYTE). The two parameters are:
470 * HI: a downgradable start byte;
471 * LO: continuation.
472 * */
473#define EIGHT_BIT_UTF8_TO_NATIVE(HI, LO) \
474 ( __ASSERT_(UTF8_IS_DOWNGRADEABLE_START(HI)) \
475 __ASSERT_(UTF8_IS_CONTINUATION(LO)) \
476 LATIN1_TO_NATIVE(UTF8_ACCUMULATE(( \
477 NATIVE_UTF8_TO_I8(HI) & UTF_START_MASK(2)), (LO))))
478
479/* Convert a two (not one) byte utf8 character to a native code point value.
480 * Needs just one iteration of accumulate. Should not be used unless it is
481 * known that the two bytes are legal: 1) two-byte start, and 2) continuation.
482 * Note that the result can be larger than 255 if the input character is not
483 * downgradable */
484#define TWO_BYTE_UTF8_TO_NATIVE(HI, LO) \
485 (__ASSERT_(FITS_IN_8_BITS(HI)) \
486 __ASSERT_(FITS_IN_8_BITS(LO)) \
487 __ASSERT_(PL_utf8skip[HI] == 2) \
488 __ASSERT_(UTF8_IS_CONTINUATION(LO)) \
489 UNI_TO_NATIVE(UTF8_ACCUMULATE((NATIVE_UTF8_TO_I8(HI) & UTF_START_MASK(2)), \
490 (LO))))
491
492/* Should never be used, and be deprecated */
493#define TWO_BYTE_UTF8_TO_UNI(HI, LO) NATIVE_TO_UNI(TWO_BYTE_UTF8_TO_NATIVE(HI, LO))
494
495/*
496
497=for apidoc Am|STRLEN|UTF8SKIP|char* s
498returns the number of bytes in the UTF-8 encoded character whose first (perhaps
499only) byte is pointed to by C<s>.
500
501=cut
502 */
503#define UTF8SKIP(s) PL_utf8skip[*(const U8*)(s)]
504#define UTF8_SKIP(s) UTF8SKIP(s)
505
506/* Most code that says 'UNI_' really means the native value for code points up
507 * through 255 */
508#define UNI_IS_INVARIANT(cp) UVCHR_IS_INVARIANT(cp)
509
510/*
511=for apidoc Am|bool|UTF8_IS_INVARIANT|char c
512
513Evaluates to 1 if the byte C<c> represents the same character when encoded in
514UTF-8 as when not; otherwise evaluates to 0. UTF-8 invariant characters can be
515copied as-is when converting to/from UTF-8, saving time.
516
517In spite of the name, this macro gives the correct result if the input string
518from which C<c> comes is not encoded in UTF-8.
519
520See C<L</UVCHR_IS_INVARIANT>> for checking if a UV is invariant.
521
522=cut
523
524The reason it works on both UTF-8 encoded strings and non-UTF-8 encoded, is
525that it returns TRUE in each for the exact same set of bit patterns. It is
526valid on a subset of what UVCHR_IS_INVARIANT is valid on, so can just use that;
527and the compiler should optimize out anything extraneous given the
528implementation of the latter. The |0 makes sure this isn't mistakenly called
529with a ptr argument.
530*/
531#define UTF8_IS_INVARIANT(c) UVCHR_IS_INVARIANT((c) | 0)
532
533/* Like the above, but its name implies a non-UTF8 input, which as the comments
534 * above show, doesn't matter as to its implementation */
535#define NATIVE_BYTE_IS_INVARIANT(c) UVCHR_IS_INVARIANT(c)
536
537/* The macros in the next 4 sets are used to generate the two utf8 or utfebcdic
538 * bytes from an ordinal that is known to fit into exactly two (not one) bytes;
539 * it must be less than 0x3FF to work across both encodings. */
540
541/* These two are helper macros for the other three sets, and should not be used
542 * directly anywhere else. 'translate_function' is either NATIVE_TO_LATIN1
543 * (which works for code points up through 0xFF) or NATIVE_TO_UNI which works
544 * for any code point */
545#define __BASE_TWO_BYTE_HI(c, translate_function) \
546 (__ASSERT_(! UVCHR_IS_INVARIANT(c)) \
547 I8_TO_NATIVE_UTF8((translate_function(c) >> UTF_ACCUMULATION_SHIFT) \
548 | UTF_START_MARK(2)))
549#define __BASE_TWO_BYTE_LO(c, translate_function) \
550 (__ASSERT_(! UVCHR_IS_INVARIANT(c)) \
551 I8_TO_NATIVE_UTF8((translate_function(c) & UTF_CONTINUATION_MASK) \
552 | UTF_CONTINUATION_MARK))
553
554/* The next two macros should not be used. They were designed to be usable as
555 * the case label of a switch statement, but this doesn't work for EBCDIC. Use
556 * regen/unicode_constants.pl instead */
557#define UTF8_TWO_BYTE_HI_nocast(c) __BASE_TWO_BYTE_HI(c, NATIVE_TO_UNI)
558#define UTF8_TWO_BYTE_LO_nocast(c) __BASE_TWO_BYTE_LO(c, NATIVE_TO_UNI)
559
560/* The next two macros are used when the source should be a single byte
561 * character; checked for under DEBUGGING */
562#define UTF8_EIGHT_BIT_HI(c) (__ASSERT_(FITS_IN_8_BITS(c)) \
563 ( __BASE_TWO_BYTE_HI(c, NATIVE_TO_LATIN1)))
564#define UTF8_EIGHT_BIT_LO(c) (__ASSERT_(FITS_IN_8_BITS(c)) \
565 (__BASE_TWO_BYTE_LO(c, NATIVE_TO_LATIN1)))
566
567/* These final two macros in the series are used when the source can be any
568 * code point whose UTF-8 is known to occupy 2 bytes; they are less efficient
569 * than the EIGHT_BIT versions on EBCDIC platforms. We use the logical '~'
570 * operator instead of "<=" to avoid getting compiler warnings.
571 * MAX_UTF8_TWO_BYTE should be exactly all one bits in the lower few
572 * places, so the ~ works */
573#define UTF8_TWO_BYTE_HI(c) \
574 (__ASSERT_((sizeof(c) == 1) \
575 || !(((WIDEST_UTYPE)(c)) & ~MAX_UTF8_TWO_BYTE)) \
576 (__BASE_TWO_BYTE_HI(c, NATIVE_TO_UNI)))
577#define UTF8_TWO_BYTE_LO(c) \
578 (__ASSERT_((sizeof(c) == 1) \
579 || !(((WIDEST_UTYPE)(c)) & ~MAX_UTF8_TWO_BYTE)) \
580 (__BASE_TWO_BYTE_LO(c, NATIVE_TO_UNI)))
581
582/* This is illegal in any well-formed UTF-8 in both EBCDIC and ASCII
583 * as it is only in overlongs. */
584#define ILLEGAL_UTF8_BYTE I8_TO_NATIVE_UTF8(0xC1)
585
586/*
587 * 'UTF' is whether or not p is encoded in UTF8. The names 'foo_lazy_if' stem
588 * from an earlier version of these macros in which they didn't call the
589 * foo_utf8() macros (i.e. were 'lazy') unless they decided that *p is the
590 * beginning of a utf8 character. Now that foo_utf8() determines that itself,
591 * no need to do it again here
592 */
593#define isIDFIRST_lazy_if(p,UTF) \
594 _is_utf8_FOO(_CC_IDFIRST, (const U8 *) p, "isIDFIRST_lazy_if", \
595 "isIDFIRST_lazy_if_safe", \
596 cBOOL(UTF && ! IN_BYTES), 0, __FILE__,__LINE__)
597
598#define isIDFIRST_lazy_if_safe(p, e, UTF) \
599 ((IN_BYTES || !UTF) \
600 ? isIDFIRST(*(p)) \
601 : isIDFIRST_utf8_safe(p, e))
602
603#define isWORDCHAR_lazy_if(p,UTF) \
604 _is_utf8_FOO(_CC_IDFIRST, (const U8 *) p, "isWORDCHAR_lazy_if", \
605 "isWORDCHAR_lazy_if_safe", \
606 cBOOL(UTF && ! IN_BYTES), 0, __FILE__,__LINE__)
607
608#define isWORDCHAR_lazy_if_safe(p, e, UTF) \
609 ((IN_BYTES || !UTF) \
610 ? isWORDCHAR(*(p)) \
611 : isWORDCHAR_utf8_safe((U8 *) p, (U8 *) e))
612
613#define isALNUM_lazy_if(p,UTF) \
614 _is_utf8_FOO(_CC_IDFIRST, (const U8 *) p, "isALNUM_lazy_if", \
615 "isWORDCHAR_lazy_if_safe", \
616 cBOOL(UTF && ! IN_BYTES), 0, __FILE__,__LINE__)
617
618#define UTF8_MAXLEN UTF8_MAXBYTES
619
620/* A Unicode character can fold to up to 3 characters */
621#define UTF8_MAX_FOLD_CHAR_EXPAND 3
622
623#define IN_BYTES UNLIKELY(CopHINTS_get(PL_curcop) & HINT_BYTES)
624
625/*
626
627=for apidoc Am|bool|DO_UTF8|SV* sv
628Returns a bool giving whether or not the PV in C<sv> is to be treated as being
629encoded in UTF-8.
630
631You should use this I<after> a call to C<SvPV()> or one of its variants, in
632case any call to string overloading updates the internal UTF-8 encoding flag.
633
634=cut
635*/
636#define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTES)
637
638/* Should all strings be treated as Unicode, and not just UTF-8 encoded ones?
639 * Is so within 'feature unicode_strings' or 'locale :not_characters', and not
640 * within 'use bytes'. UTF-8 locales are not tested for here, but perhaps
641 * could be */
642#define IN_UNI_8_BIT \
643 (( ( (CopHINTS_get(PL_curcop) & HINT_UNI_8_BIT)) \
644 || ( CopHINTS_get(PL_curcop) & HINT_LOCALE_PARTIAL \
645 /* -1 below is for :not_characters */ \
646 && _is_in_locale_category(FALSE, -1))) \
647 && (! IN_BYTES))
648
649
650#define UTF8_ALLOW_EMPTY 0x0001 /* Allow a zero length string */
651#define UTF8_GOT_EMPTY UTF8_ALLOW_EMPTY
652
653/* Allow first byte to be a continuation byte */
654#define UTF8_ALLOW_CONTINUATION 0x0002
655#define UTF8_GOT_CONTINUATION UTF8_ALLOW_CONTINUATION
656
657/* Unexpected non-continuation byte */
658#define UTF8_ALLOW_NON_CONTINUATION 0x0004
659#define UTF8_GOT_NON_CONTINUATION UTF8_ALLOW_NON_CONTINUATION
660
661/* expecting more bytes than were available in the string */
662#define UTF8_ALLOW_SHORT 0x0008
663#define UTF8_GOT_SHORT UTF8_ALLOW_SHORT
664
665/* Overlong sequence; i.e., the code point can be specified in fewer bytes.
666 * First one will convert the overlong to the REPLACEMENT CHARACTER; second
667 * will return what the overlong evaluates to */
668#define UTF8_ALLOW_LONG 0x0010
669#define UTF8_ALLOW_LONG_AND_ITS_VALUE (UTF8_ALLOW_LONG|0x0020)
670#define UTF8_GOT_LONG UTF8_ALLOW_LONG
671
672#define UTF8_ALLOW_OVERFLOW 0x0080
673#define UTF8_GOT_OVERFLOW UTF8_ALLOW_OVERFLOW
674
675#define UTF8_DISALLOW_SURROGATE 0x0100 /* Unicode surrogates */
676#define UTF8_GOT_SURROGATE UTF8_DISALLOW_SURROGATE
677#define UTF8_WARN_SURROGATE 0x0200
678
679/* Unicode non-character code points */
680#define UTF8_DISALLOW_NONCHAR 0x0400
681#define UTF8_GOT_NONCHAR UTF8_DISALLOW_NONCHAR
682#define UTF8_WARN_NONCHAR 0x0800
683
684/* Super-set of Unicode: code points above the legal max */
685#define UTF8_DISALLOW_SUPER 0x1000
686#define UTF8_GOT_SUPER UTF8_DISALLOW_SUPER
687#define UTF8_WARN_SUPER 0x2000
688
689/* The original UTF-8 standard did not define UTF-8 with start bytes of 0xFE or
690 * 0xFF, though UTF-EBCDIC did. This allowed both versions to represent code
691 * points up to 2 ** 31 - 1. Perl extends UTF-8 so that 0xFE and 0xFF are
692 * usable on ASCII platforms, and 0xFF means something different than
693 * UTF-EBCDIC defines. These changes allow code points of 64 bits (actually
694 * somewhat more) to be represented on both platforms. But these are Perl
695 * extensions, and not likely to be interchangeable with other languages. Note
696 * that on ASCII platforms, FE overflows a signed 32-bit word, and FF an
697 * unsigned one. */
698#define UTF8_DISALLOW_PERL_EXTENDED 0x4000
699#define UTF8_GOT_PERL_EXTENDED UTF8_DISALLOW_PERL_EXTENDED
700#define UTF8_WARN_PERL_EXTENDED 0x8000
701
702/* For back compat, these old names are misleading for overlongs and
703 * UTF_EBCDIC. */
704#define UTF8_DISALLOW_ABOVE_31_BIT UTF8_DISALLOW_PERL_EXTENDED
705#define UTF8_GOT_ABOVE_31_BIT UTF8_GOT_PERL_EXTENDED
706#define UTF8_WARN_ABOVE_31_BIT UTF8_WARN_PERL_EXTENDED
707#define UTF8_DISALLOW_FE_FF UTF8_DISALLOW_PERL_EXTENDED
708#define UTF8_WARN_FE_FF UTF8_WARN_PERL_EXTENDED
709
710#define UTF8_CHECK_ONLY 0x10000
711#define _UTF8_NO_CONFIDENCE_IN_CURLEN 0x20000 /* Internal core use only */
712
713/* For backwards source compatibility. They do nothing, as the default now
714 * includes what they used to mean. The first one's meaning was to allow the
715 * just the single non-character 0xFFFF */
716#define UTF8_ALLOW_FFFF 0
717#define UTF8_ALLOW_FE_FF 0
718#define UTF8_ALLOW_SURROGATE 0
719
720/* C9 refers to Unicode Corrigendum #9: allows but discourages non-chars */
721#define UTF8_DISALLOW_ILLEGAL_C9_INTERCHANGE \
722 (UTF8_DISALLOW_SUPER|UTF8_DISALLOW_SURROGATE)
723#define UTF8_WARN_ILLEGAL_C9_INTERCHANGE (UTF8_WARN_SUPER|UTF8_WARN_SURROGATE)
724
725#define UTF8_DISALLOW_ILLEGAL_INTERCHANGE \
726 (UTF8_DISALLOW_ILLEGAL_C9_INTERCHANGE|UTF8_DISALLOW_NONCHAR)
727#define UTF8_WARN_ILLEGAL_INTERCHANGE \
728 (UTF8_WARN_ILLEGAL_C9_INTERCHANGE|UTF8_WARN_NONCHAR)
729
730/* This is typically used for code that processes UTF-8 input and doesn't want
731 * to have to deal with any malformations that might be present. All such will
732 * be safely replaced by the REPLACEMENT CHARACTER, unless other flags
733 * overriding this are also present. */
734#define UTF8_ALLOW_ANY ( UTF8_ALLOW_CONTINUATION \
735 |UTF8_ALLOW_NON_CONTINUATION \
736 |UTF8_ALLOW_SHORT \
737 |UTF8_ALLOW_LONG \
738 |UTF8_ALLOW_OVERFLOW)
739
740/* Accept any Perl-extended UTF-8 that evaluates to any UV on the platform, but
741 * not any malformed. This is the default. */
742#define UTF8_ALLOW_ANYUV 0
743#define UTF8_ALLOW_DEFAULT UTF8_ALLOW_ANYUV
744
745/*
746=for apidoc Am|bool|UTF8_IS_SURROGATE|const U8 *s|const U8 *e
747
748Evaluates to non-zero if the first few bytes of the string starting at C<s> and
749looking no further than S<C<e - 1>> are well-formed UTF-8 that represents one
750of the Unicode surrogate code points; otherwise it evaluates to 0. If
751non-zero, the value gives how many bytes starting at C<s> comprise the code
752point's representation.
753
754=cut
755 */
756#define UTF8_IS_SURROGATE(s, e) is_SURROGATE_utf8_safe(s, e)
757
758
759#define UTF8_IS_REPLACEMENT(s, send) is_REPLACEMENT_utf8_safe(s,send)
760
761#define MAX_LEGAL_CP IV_MAX
762
763/*
764=for apidoc Am|bool|UTF8_IS_SUPER|const U8 *s|const U8 *e
765
766Recall that Perl recognizes an extension to UTF-8 that can encode code
767points larger than the ones defined by Unicode, which are 0..0x10FFFF.
768
769This macro evaluates to non-zero if the first few bytes of the string starting
770at C<s> and looking no further than S<C<e - 1>> are from this UTF-8 extension;
771otherwise it evaluates to 0. If non-zero, the value gives how many bytes
772starting at C<s> comprise the code point's representation.
773
7740 is returned if the bytes are not well-formed extended UTF-8, or if they
775represent a code point that cannot fit in a UV on the current platform. Hence
776this macro can give different results when run on a 64-bit word machine than on
777one with a 32-bit word size.
778
779Note that it is illegal to have code points that are larger than what can
780fit in an IV on the current machine.
781
782=cut
783
784 * ASCII EBCDIC I8
785 * U+10FFFF: \xF4\x8F\xBF\xBF \xF9\xA1\xBF\xBF\xBF max legal Unicode
786 * U+110000: \xF4\x90\x80\x80 \xF9\xA2\xA0\xA0\xA0
787 * U+110001: \xF4\x90\x80\x81 \xF9\xA2\xA0\xA0\xA1
788 */
789#ifdef EBCDIC
790# define UTF8_IS_SUPER(s, e) \
791 (( LIKELY((e) > (s) + 4) \
792 && NATIVE_UTF8_TO_I8(*(s)) >= 0xF9 \
793 && ( NATIVE_UTF8_TO_I8(*(s)) > 0xF9 \
794 || (NATIVE_UTF8_TO_I8(*((s) + 1)) >= 0xA2)) \
795 && LIKELY((s) + UTF8SKIP(s) <= (e))) \
796 ? _is_utf8_char_helper(s, s + UTF8SKIP(s), 0) : 0)
797#else
798# define UTF8_IS_SUPER(s, e) \
799 (( LIKELY((e) > (s) + 3) \
800 && (*(U8*) (s)) >= 0xF4 \
801 && ((*(U8*) (s)) > 0xF4 || (*((U8*) (s) + 1) >= 0x90))\
802 && LIKELY((s) + UTF8SKIP(s) <= (e))) \
803 ? _is_utf8_char_helper(s, s + UTF8SKIP(s), 0) : 0)
804#endif
805
806/* These are now machine generated, and the 'given' clause is no longer
807 * applicable */
808#define UTF8_IS_NONCHAR_GIVEN_THAT_NON_SUPER_AND_GE_PROBLEMATIC(s, e) \
809 cBOOL(is_NONCHAR_utf8_safe(s,e))
810
811/*
812=for apidoc Am|bool|UTF8_IS_NONCHAR|const U8 *s|const U8 *e
813
814Evaluates to non-zero if the first few bytes of the string starting at C<s> and
815looking no further than S<C<e - 1>> are well-formed UTF-8 that represents one
816of the Unicode non-character code points; otherwise it evaluates to 0. If
817non-zero, the value gives how many bytes starting at C<s> comprise the code
818point's representation.
819
820=cut
821 */
822#define UTF8_IS_NONCHAR(s, e) \
823 UTF8_IS_NONCHAR_GIVEN_THAT_NON_SUPER_AND_GE_PROBLEMATIC(s, e)
824
825#define UNICODE_SURROGATE_FIRST 0xD800
826#define UNICODE_SURROGATE_LAST 0xDFFF
827#define UNICODE_REPLACEMENT 0xFFFD
828#define UNICODE_BYTE_ORDER_MARK 0xFEFF
829
830/* Though our UTF-8 encoding can go beyond this,
831 * let's be conservative and do as Unicode says. */
832#define PERL_UNICODE_MAX 0x10FFFF
833
834#define UNICODE_WARN_SURROGATE 0x0001 /* UTF-16 surrogates */
835#define UNICODE_WARN_NONCHAR 0x0002 /* Non-char code points */
836#define UNICODE_WARN_SUPER 0x0004 /* Above 0x10FFFF */
837#define UNICODE_WARN_PERL_EXTENDED 0x0008 /* Above 0x7FFF_FFFF */
838#define UNICODE_WARN_ABOVE_31_BIT UNICODE_WARN_PERL_EXTENDED
839#define UNICODE_DISALLOW_SURROGATE 0x0010
840#define UNICODE_DISALLOW_NONCHAR 0x0020
841#define UNICODE_DISALLOW_SUPER 0x0040
842#define UNICODE_DISALLOW_PERL_EXTENDED 0x0080
843#define UNICODE_DISALLOW_ABOVE_31_BIT UNICODE_DISALLOW_PERL_EXTENDED
844
845#define UNICODE_GOT_SURROGATE UNICODE_DISALLOW_SURROGATE
846#define UNICODE_GOT_NONCHAR UNICODE_DISALLOW_NONCHAR
847#define UNICODE_GOT_SUPER UNICODE_DISALLOW_SUPER
848#define UNICODE_GOT_PERL_EXTENDED UNICODE_DISALLOW_PERL_EXTENDED
849
850#define UNICODE_WARN_ILLEGAL_C9_INTERCHANGE \
851 (UNICODE_WARN_SURROGATE|UNICODE_WARN_SUPER)
852#define UNICODE_WARN_ILLEGAL_INTERCHANGE \
853 (UNICODE_WARN_ILLEGAL_C9_INTERCHANGE|UNICODE_WARN_NONCHAR)
854#define UNICODE_DISALLOW_ILLEGAL_C9_INTERCHANGE \
855 (UNICODE_DISALLOW_SURROGATE|UNICODE_DISALLOW_SUPER)
856#define UNICODE_DISALLOW_ILLEGAL_INTERCHANGE \
857 (UNICODE_DISALLOW_ILLEGAL_C9_INTERCHANGE|UNICODE_DISALLOW_NONCHAR)
858
859/* For backward source compatibility, as are now the default */
860#define UNICODE_ALLOW_SURROGATE 0
861#define UNICODE_ALLOW_SUPER 0
862#define UNICODE_ALLOW_ANY 0
863
864/* This matches the 2048 code points between UNICODE_SURROGATE_FIRST (0xD800) and
865 * UNICODE_SURROGATE_LAST (0xDFFF) */
866#define UNICODE_IS_SURROGATE(uv) (((UV) (uv) & (~0xFFFF | 0xF800)) \
867 == 0xD800)
868
869#define UNICODE_IS_REPLACEMENT(uv) ((UV) (uv) == UNICODE_REPLACEMENT)
870#define UNICODE_IS_BYTE_ORDER_MARK(uv) ((UV) (uv) == UNICODE_BYTE_ORDER_MARK)
871
872/* Is 'uv' one of the 32 contiguous-range noncharacters? */
873#define UNICODE_IS_32_CONTIGUOUS_NONCHARS(uv) ((UV) (uv) >= 0xFDD0 \
874 && (UV) (uv) <= 0xFDEF)
875
876/* Is 'uv' one of the 34 plane-ending noncharacters 0xFFFE, 0xFFFF, 0x1FFFE,
877 * 0x1FFFF, ... 0x10FFFE, 0x10FFFF, given that we know that 'uv' is not above
878 * the Unicode legal max */
879#define UNICODE_IS_END_PLANE_NONCHAR_GIVEN_NOT_SUPER(uv) \
880 (((UV) (uv) & 0xFFFE) == 0xFFFE)
881
882#define UNICODE_IS_NONCHAR(uv) \
883 ( UNICODE_IS_32_CONTIGUOUS_NONCHARS(uv) \
884 || ( LIKELY( ! UNICODE_IS_SUPER(uv)) \
885 && UNICODE_IS_END_PLANE_NONCHAR_GIVEN_NOT_SUPER(uv)))
886
887#define UNICODE_IS_SUPER(uv) ((UV) (uv) > PERL_UNICODE_MAX)
888
889#define LATIN_SMALL_LETTER_SHARP_S LATIN_SMALL_LETTER_SHARP_S_NATIVE
890#define LATIN_SMALL_LETTER_Y_WITH_DIAERESIS \
891 LATIN_SMALL_LETTER_Y_WITH_DIAERESIS_NATIVE
892#define MICRO_SIGN MICRO_SIGN_NATIVE
893#define LATIN_CAPITAL_LETTER_A_WITH_RING_ABOVE \
894 LATIN_CAPITAL_LETTER_A_WITH_RING_ABOVE_NATIVE
895#define LATIN_SMALL_LETTER_A_WITH_RING_ABOVE \
896 LATIN_SMALL_LETTER_A_WITH_RING_ABOVE_NATIVE
897#define UNICODE_GREEK_CAPITAL_LETTER_SIGMA 0x03A3
898#define UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA 0x03C2
899#define UNICODE_GREEK_SMALL_LETTER_SIGMA 0x03C3
900#define GREEK_SMALL_LETTER_MU 0x03BC
901#define GREEK_CAPITAL_LETTER_MU 0x039C /* Upper and title case
902 of MICRON */
903#define LATIN_CAPITAL_LETTER_Y_WITH_DIAERESIS 0x0178 /* Also is title case */
904#ifdef LATIN_CAPITAL_LETTER_SHARP_S_UTF8
905# define LATIN_CAPITAL_LETTER_SHARP_S 0x1E9E
906#endif
907#define LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE 0x130
908#define LATIN_SMALL_LETTER_DOTLESS_I 0x131
909#define LATIN_SMALL_LETTER_LONG_S 0x017F
910#define LATIN_SMALL_LIGATURE_LONG_S_T 0xFB05
911#define LATIN_SMALL_LIGATURE_ST 0xFB06
912#define KELVIN_SIGN 0x212A
913#define ANGSTROM_SIGN 0x212B
914
915#define UNI_DISPLAY_ISPRINT 0x0001
916#define UNI_DISPLAY_BACKSLASH 0x0002
917#define UNI_DISPLAY_QQ (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
918#define UNI_DISPLAY_REGEX (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
919
920#define ANYOF_FOLD_SHARP_S(node, input, end) \
921 (ANYOF_BITMAP_TEST(node, LATIN_SMALL_LETTER_SHARP_S) && \
922 (ANYOF_NONBITMAP(node)) && \
923 (ANYOF_FLAGS(node) & ANYOF_LOC_NONBITMAP_FOLD) && \
924 ((end) > (input) + 1) && \
925 isALPHA_FOLD_EQ((input)[0], 's'))
926
927#define SHARP_S_SKIP 2
928
929#define is_utf8_char_buf(buf, buf_end) isUTF8_CHAR(buf, buf_end)
930#define bytes_from_utf8(s, lenp, is_utf8p) \
931 bytes_from_utf8_loc(s, lenp, is_utf8p, 0)
932
933/*
934
935=for apidoc Am|STRLEN|isUTF8_CHAR_flags|const U8 *s|const U8 *e| const U32 flags
936
937Evaluates to non-zero if the first few bytes of the string starting at C<s> and
938looking no further than S<C<e - 1>> are well-formed UTF-8, as extended by Perl,
939that represents some code point, subject to the restrictions given by C<flags>;
940otherwise it evaluates to 0. If non-zero, the value gives how many bytes
941starting at C<s> comprise the code point's representation. Any bytes remaining
942before C<e>, but beyond the ones needed to form the first code point in C<s>,
943are not examined.
944
945If C<flags> is 0, this gives the same results as C<L</isUTF8_CHAR>>;
946if C<flags> is C<UTF8_DISALLOW_ILLEGAL_INTERCHANGE>, this gives the same results
947as C<L</isSTRICT_UTF8_CHAR>>;
948and if C<flags> is C<UTF8_DISALLOW_ILLEGAL_C9_INTERCHANGE>, this gives
949the same results as C<L</isC9_STRICT_UTF8_CHAR>>.
950Otherwise C<flags> may be any combination of the C<UTF8_DISALLOW_I<foo>> flags
951understood by C<L</utf8n_to_uvchr>>, with the same meanings.
952
953The three alternative macros are for the most commonly needed validations; they
954are likely to run somewhat faster than this more general one, as they can be
955inlined into your code.
956
957Use L</is_utf8_string_flags>, L</is_utf8_string_loc_flags>, and
958L</is_utf8_string_loclen_flags> to check entire strings.
959
960=cut
961*/
962
963#define isUTF8_CHAR_flags(s, e, flags) \
964 (UNLIKELY((e) <= (s)) \
965 ? 0 \
966 : (UTF8_IS_INVARIANT(*s)) \
967 ? 1 \
968 : UNLIKELY(((e) - (s)) < UTF8SKIP(s)) \
969 ? 0 \
970 : _is_utf8_char_helper(s, e, flags))
971
972/* Do not use; should be deprecated. Use isUTF8_CHAR() instead; this is
973 * retained solely for backwards compatibility */
974#define IS_UTF8_CHAR(p, n) (isUTF8_CHAR(p, (p) + (n)) == n)
975
976#endif /* PERL_UTF8_H_ */
977
978/*
979 * ex: set ts=8 sts=4 sw=4 et:
980 */
Unnamed repository; edit this file 'description' to name the repository.