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[perl #118091] Split gv_fetchpvn_flags into smaller functions
[perl5.git] / utf8.h
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1/* utf8.h
2 *
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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 *
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9 * Copyright (C) 2000, 2001, 2002, 2005, 2006, 2007, 2009,
10 * 2010, 2011 by Larry Wall and others
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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
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17#ifndef H_UTF8 /* Guard against recursive inclusion */
18#define H_UTF8 1
19
39e02b42 20/* Use UTF-8 as the default script encoding?
1e54db1a 21 * Turning this on will break scripts having non-UTF-8 binary
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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
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29#include "regcharclass.h"
30#include "unicode_constants.h"
31
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32/* For to_utf8_fold_flags, q.v. */
33#define FOLD_FLAGS_LOCALE 0x1
34#define FOLD_FLAGS_FULL 0x2
a0270393 35#define FOLD_FLAGS_NOMIX_ASCII 0x4
051a06d4 36
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37/* For _core_swash_init(), internal core use only */
38#define _CORE_SWASH_INIT_USER_DEFINED_PROPERTY 0x1
5d3d13d1 39#define _CORE_SWASH_INIT_RETURN_IF_UNDEF 0x2
87367d5f 40#define _CORE_SWASH_INIT_ACCEPT_INVLIST 0x4
83199d38 41
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42#define uvchr_to_utf8(a,b) uvchr_to_utf8_flags(a,b,0)
43#define uvchr_to_utf8_flags(d,uv,flags) \
44 uvoffuni_to_utf8_flags(d,NATIVE_TO_UNI(uv),flags)
45#define utf8_to_uvchr_buf(s, e, lenp) \
842991ae 46 utf8n_to_uvchr(s, (U8*)(e) - (U8*)(s), lenp, \
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47 ckWARN_d(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY)
48
a0270393 49#define to_uni_fold(c, p, lenp) _to_uni_fold_flags(c, p, lenp, FOLD_FLAGS_FULL)
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50#define to_utf8_fold(c, p, lenp) _to_utf8_fold_flags(c, p, lenp, \
51 FOLD_FLAGS_FULL, NULL)
52#define to_utf8_lower(a,b,c) _to_utf8_lower_flags(a,b,c,0, NULL)
53#define to_utf8_upper(a,b,c) _to_utf8_upper_flags(a,b,c,0, NULL)
54#define to_utf8_title(a,b,c) _to_utf8_title_flags(a,b,c,0, NULL)
36bb2ab6 55
fd7cb289 56/* Source backward compatibility. */
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57#define is_utf8_string_loc(s, len, ep) is_utf8_string_loclen(s, len, ep, 0)
58
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59#define foldEQ_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2) \
60 foldEQ_utf8_flags(s1, pe1, l1, u1, s2, pe2, l2, u2, 0)
a33c29bc 61#define FOLDEQ_UTF8_NOMIX_ASCII (1 << 0)
5e64d0fa 62#define FOLDEQ_UTF8_LOCALE (1 << 1)
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63#define FOLDEQ_S1_ALREADY_FOLDED (1 << 2)
64#define FOLDEQ_S2_ALREADY_FOLDED (1 << 3)
a33c29bc 65
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66/*
67=for apidoc ibcmp_utf8
68
69This is a synonym for (! foldEQ_utf8())
70
71=cut
72*/
73#define ibcmp_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2) \
74 cBOOL(! foldEQ_utf8(s1, pe1, l1, u1, s2, pe2, l2, u2))
75
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76#ifdef EBCDIC
77/* The equivalent of these macros but implementing UTF-EBCDIC
78 are in the following header file:
79 */
80
81#include "utfebcdic.h"
fd7cb289 82
d06134e5 83#else /* ! EBCDIC */
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84START_EXTERN_C
85
a0ed51b3 86#ifdef DOINIT
6f06b55f 87EXTCONST unsigned char PL_utf8skip[] = {
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88/* 0x00 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
89/* 0x10 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
90/* 0x20 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
91/* 0x30 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
92/* 0x40 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
93/* 0x50 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
94/* 0x60 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
95/* 0x70 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ascii */
96/* 0x80 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */
97/* 0x90 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */
98/* 0xA0 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */
99/* 0xB0 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* bogus: continuation byte */
100/* 0xC0 */ 2,2, /* overlong */
101/* 0xC2 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* U+0080 to U+03FF */
102/* 0xD0 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* U+0400 to U+07FF */
103/* 0xE0 */ 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, /* U+0800 to U+FFFF */
104/* 0xF0 */ 4,4,4,4,4,4,4,4,5,5,5,5,6,6, /* above BMP to 2**31 - 1 */
105/* 0xFE */ 7,13, /* Perl extended (never was official UTF-8). Up to 72bit
106 allowed (64-bit + reserved). */
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107};
108#else
6f06b55f 109EXTCONST unsigned char PL_utf8skip[];
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110#endif
111
73c4f7a1 112END_EXTERN_C
7e2040f0 113
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114/* Native character to/from iso-8859-1. Are the identity functions on ASCII
115 * platforms */
116#define NATIVE_TO_LATIN1(ch) (ch)
117#define LATIN1_TO_NATIVE(ch) (ch)
118
119/* I8 is an intermediate version of UTF-8 used only in UTF-EBCDIC. We thus
120 * consider it to be identical to UTF-8 on ASCII platforms. Strictly speaking
121 * UTF-8 and UTF-EBCDIC are two different things, but we often conflate them
122 * because they are 8-bit encodings that serve the same purpose in Perl, and
123 * rarely do we need to distinguish them. The term "NATIVE_UTF8" applies to
124 * whichever one is applicable on the current platform */
125#define NATIVE_UTF8_TO_I8(ch) (ch)
126#define I8_TO_NATIVE_UTF8(ch) (ch)
127
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128/* Transforms in wide UV chars */
129#define UNI_TO_NATIVE(ch) (ch)
130#define NATIVE_TO_UNI(ch) (ch)
d7578b48 131
877d9f0d 132/*
9041c2e3 133
8c007b5a 134 The following table is from Unicode 3.2.
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135
136 Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
137
375122d7 138 U+0000..U+007F 00..7F
e1b711da 139 U+0080..U+07FF * C2..DF 80..BF
37e2e78e 140 U+0800..U+0FFF E0 * A0..BF 80..BF
375122d7 141 U+1000..U+CFFF E1..EC 80..BF 80..BF
e1b711da 142 U+D000..U+D7FF ED 80..9F 80..BF
537124e4 143 U+D800..U+DFFF ED A0..BF 80..BF (surrogates)
375122d7 144 U+E000..U+FFFF EE..EF 80..BF 80..BF
37e2e78e 145 U+10000..U+3FFFF F0 * 90..BF 80..BF 80..BF
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146 U+40000..U+FFFFF F1..F3 80..BF 80..BF 80..BF
147 U+100000..U+10FFFF F4 80..8F 80..BF 80..BF
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148 Below are non-Unicode code points
149 U+110000..U+13FFFF F4 90..BF 80..BF 80..BF
150 U+110000..U+1FFFFF F5..F7 80..BF 80..BF 80..BF
537124e4 151 U+200000..: F8.. * 88..BF 80..BF 80..BF 80..BF
877d9f0d 152
e1b711da 153Note the gaps before several of the byte entries above marked by '*'. These are
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154caused by legal UTF-8 avoiding non-shortest encodings: it is technically
155possible to UTF-8-encode a single code point in different ways, but that is
156explicitly forbidden, and the shortest possible encoding should always be used
15824458 157(and that is what Perl does). The non-shortest ones are called 'overlongs'.
8c007b5a 158
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159 */
160
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161/*
162 Another way to look at it, as bits:
163
b2635aa8 164 Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
8c007b5a 165
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166 0aaa aaaa 0aaa aaaa
167 0000 0bbb bbaa aaaa 110b bbbb 10aa aaaa
168 cccc bbbb bbaa aaaa 1110 cccc 10bb bbbb 10aa aaaa
169 00 000d ddcc cccc bbbb bbaa aaaa 1111 0ddd 10cc cccc 10bb bbbb 10aa aaaa
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170
171As you can see, the continuation bytes all begin with C<10>, and the
e1b711da 172leading bits of the start byte tell how many bytes there are in the
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173encoded character.
174
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175Perl's extended UTF-8 means we can have start bytes up to FF.
176
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177*/
178
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179/* Is the representation of the Unicode code point 'c' the same regardless of
180 * being encoded in UTF-8 or not? */
c4d5f83a 181#define UNI_IS_INVARIANT(c) (((UV)c) < 0x80)
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182
183/* Is the UTF8-encoded byte 'c' part of a variant sequence in UTF-8? This is
184 * the inverse of UTF8_IS_INVARIANT */
185#define UTF8_IS_CONTINUED(c) (((U8)c) & 0x80)
186
187/* Is the byte 'c' the first byte of a multi-byte UTF8-8 encoded sequence?
188 * This doesn't catch invariants (they are single-byte). It also excludes the
189 * illegal overlong sequences that begin with C0 and C1. */
0447e8df 190#define UTF8_IS_START(c) (((U8)c) >= 0xc2)
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191
192/* Is the byte 'c' part of a multi-byte UTF8-8 encoded sequence, and not the
193 * first byte thereof? */
e021c6e6 194#define UTF8_IS_CONTINUATION(c) ((((U8)c) & 0xC0) == 0x80)
0ae1fa71 195
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196/* Is the UTF8-encoded byte 'c' the first byte of a two byte sequence? Use
197 * UTF8_IS_NEXT_CHAR_DOWNGRADEABLE() instead if the input isn't known to
198 * be well-formed. Masking with 0xfe allows the low bit to be 0 or 1; thus
199 * this matches 0xc[23]. */
559c7f10 200#define UTF8_IS_DOWNGRADEABLE_START(c) (((U8)(c) & 0xfe) == 0xc2)
4ab10950 201
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202/* Is the UTF8-encoded byte 'c' the first byte of a sequence of bytes that
203 * represent a code point > 255? */
7b4252f4 204#define UTF8_IS_ABOVE_LATIN1(c) ((U8)(c) >= 0xc4)
8850bf83 205
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206/* This defines the 1-bits that are to be in the first byte of a multi-byte
207 * UTF-8 encoded character that give the number of bytes that comprise the
f710bf0c 208 * character. 'len' is the number of bytes in the multi-byte sequence. */
ee372ee9 209#define UTF_START_MARK(len) (((len) > 7) ? 0xFF : (0xFF & (0xFE << (7-(len)))))
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210
211/* Masks out the initial one bits in a start byte, leaving the real data ones.
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212 * Doesn't work on an invariant byte. 'len' is the number of bytes in the
213 * multi-byte sequence that comprises the character. */
22901f30 214#define UTF_START_MASK(len) (((len) >= 7) ? 0x00 : (0x1F >> ((len)-2)))
1d72bdf6 215
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216/* This defines the bits that are to be in the continuation bytes of a multi-byte
217 * UTF-8 encoded character that indicate it is a continuation byte. */
1d72bdf6 218#define UTF_CONTINUATION_MARK 0x80
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219
220/* This is the number of low-order bits a continuation byte in a UTF-8 encoded
221 * sequence contributes to the specification of the code point. In the bit
222 * maps above, you see that the first 2 bits are a constant '10', leaving 6 of
223 * real information */
1d72bdf6 224#define UTF_ACCUMULATION_SHIFT 6
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225
226/* 2**UTF_ACCUMULATION_SHIFT - 1 */
1d72bdf6 227#define UTF_CONTINUATION_MASK ((U8)0x3f)
c512ce4f 228
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229/* If a value is anded with this, and the result is non-zero, then using the
230 * original value in UTF8_ACCUMULATE will overflow, shifting bits off the left
231 * */
eb83ed87 232#define UTF_ACCUMULATION_OVERFLOW_MASK \
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233 (((UV) UTF_CONTINUATION_MASK) << ((sizeof(UV) * CHARBITS) \
234 - UTF_ACCUMULATION_SHIFT))
eb83ed87 235
1d68d6cd 236#ifdef HAS_QUAD
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237/* Input is a true Unicode (not-native) code point */
238#define OFFUNISKIP(uv) ( (uv) < 0x80 ? 1 : \
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239 (uv) < 0x800 ? 2 : \
240 (uv) < 0x10000 ? 3 : \
241 (uv) < 0x200000 ? 4 : \
242 (uv) < 0x4000000 ? 5 : \
243 (uv) < 0x80000000 ? 6 : \
9041c2e3 244 (uv) < UTF8_QUAD_MAX ? 7 : 13 )
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245#else
246/* No, I'm not even going to *TRY* putting #ifdef inside a #define */
5aaebcb3 247#define OFFUNISKIP(uv) ( (uv) < 0x80 ? 1 : \
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248 (uv) < 0x800 ? 2 : \
249 (uv) < 0x10000 ? 3 : \
250 (uv) < 0x200000 ? 4 : \
251 (uv) < 0x4000000 ? 5 : \
252 (uv) < 0x80000000 ? 6 : 7 )
253#endif
254
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255/* How wide can a single UTF-8 encoded character become in bytes. */
256/* NOTE: Strictly speaking Perl's UTF-8 should not be called UTF-8 since UTF-8
257 * is an encoding of Unicode, and Unicode's upper limit, 0x10FFFF, can be
258 * expressed with 4 bytes. However, Perl thinks of UTF-8 as a way to encode
259 * non-negative integers in a binary format, even those above Unicode */
260#define UTF8_MAXBYTES 13
261
262/* The maximum number of UTF-8 bytes a single Unicode character can
263 * uppercase/lowercase/fold into. Unicode guarantees that the maximum
264 * expansion is 3 characters. On ASCIIish platforms, the highest Unicode
265 * character occupies 4 bytes, therefore this number would be 12, but this is
266 * smaller than the maximum width a single above-Unicode character can occupy,
267 * so use that instead */
268#if UTF8_MAXBYTES < 12
269#error UTF8_MAXBYTES must be at least 12
270#endif
271
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272#define MAX_UTF8_TWO_BYTE 0x7FF
273
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274#define UTF8_MAXBYTES_CASE UTF8_MAXBYTES
275
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276#endif /* EBCDIC vs ASCII */
277
278/* Rest of these are attributes of Unicode and perl's internals rather than the
279 * encoding, or happen to be the same in both ASCII and EBCDIC (at least at
280 * this level; the macros that some of these call may have different
281 * definitions in the two encodings */
282
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283/* In domain restricted to ASCII, these may make more sense to the reader than
284 * the ones with Latin1 in the name */
285#define NATIVE_TO_ASCII(ch) NATIVE_TO_LATIN1(ch)
286#define ASCII_TO_NATIVE(ch) LATIN1_TO_NATIVE(ch)
287
288/* More or less misleadingly-named defines, retained for back compat */
289#define NATIVE_TO_UTF(ch) NATIVE_UTF8_TO_I8(ch)
290#define NATIVE_TO_I8(ch) NATIVE_UTF8_TO_I8(ch)
291#define UTF_TO_NATIVE(ch) I8_TO_NATIVE_UTF8(ch)
292#define I8_TO_NATIVE(ch) I8_TO_NATIVE_UTF8(ch)
293#define NATIVE8_TO_UNI(ch) NATIVE_TO_LATIN1(ch)
d06134e5 294
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295/* Adds a UTF8 continuation byte 'new' of information to a running total code
296 * point 'old' of all the continuation bytes so far. This is designed to be
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297 * used in a loop to convert from UTF-8 to the code point represented. Note
298 * that this is asymmetric on EBCDIC platforms, in that the 'new' parameter is
299 * the UTF-EBCDIC byte, whereas the 'old' parameter is a Unicode (not EBCDIC)
300 * code point in process of being generated */
301#define UTF8_ACCUMULATE(old, new) (((old) << UTF_ACCUMULATION_SHIFT) \
302 | ((NATIVE_UTF8_TO_I8((U8)new)) \
303 & UTF_CONTINUATION_MASK))
d06134e5 304
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305/* This works in the face of malformed UTF-8. */
306#define UTF8_IS_NEXT_CHAR_DOWNGRADEABLE(s, e) (UTF8_IS_DOWNGRADEABLE_START(*s) \
307 && ( (e) - (s) > 1) \
308 && UTF8_IS_CONTINUATION(*((s)+1)))
309
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310/* Number of bytes a code point occupies in UTF-8. */
311#define NATIVE_SKIP(uv) OFFUNISKIP(NATIVE_TO_UNI(uv))
312
313/* Most code which says UNISKIP is really thinking in terms of native code
314 * points (0-255) plus all those beyond. This is an imprecise term, but having
315 * it means existing code continues to work. For precision, use NATIVE_SKIP
316 * and OFFUNISKIP */
317#define UNISKIP(uv) NATIVE_SKIP(uv)
318
94bb8c36 319/* Convert a two (not one) byte utf8 character to a native code point value.
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320 * Needs just one iteration of accumulate. Should not be used unless it is
321 * known that the two bytes are legal: 1) two-byte start, and 2) continuation.
322 * Note that the result can be larger than 255 if the input character is not
323 * downgradable */
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324#define TWO_BYTE_UTF8_TO_NATIVE(HI, LO) \
325 UNI_TO_NATIVE(UTF8_ACCUMULATE((NATIVE_UTF8_TO_I8(HI) & UTF_START_MASK(2)), \
155d2738 326 (LO)))
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327
328/* Should never be used, and be deprecated */
329#define TWO_BYTE_UTF8_TO_UNI(HI, LO) NATIVE_TO_UNI(TWO_BYTE_UTF8_TO_NATIVE(HI, LO))
2950f2a7 330
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331/* How many bytes in the UTF-8 encoded character whose first (perhaps only)
332 * byte is pointed to by 's' */
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333#define UTF8SKIP(s) PL_utf8skip[*(const U8*)(s)]
334
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335/* Is the byte 'c' the same character when encoded in UTF-8 as when not. This
336 * works on both UTF-8 encoded strings and non-encoded, as it returns TRUE in
337 * each for the exact same set of bit patterns. (And it works on any byte in a
338 * UTF-8 encoded string) */
bc3632a8 339#define UTF8_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE_UTF8_TO_I8(c))
15824458 340
bc3632a8 341#define NATIVE_IS_INVARIANT(c) UNI_IS_INVARIANT(NATIVE_TO_LATIN1(c))
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342
343#define MAX_PORTABLE_UTF8_TWO_BYTE 0x3FF /* constrained by EBCDIC */
344
345/* The macros in the next sets are used to generate the two utf8 or utfebcdic
346 * bytes from an ordinal that is known to fit into two bytes; it must be less
347 * than 0x3FF to work across both encodings. */
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348/* Nocast allows these to be used in the case label of a switch statement;
349 * however this doesn't won't work for ebcdic, and should be avoided. Use
350 * regen/unicode_constants instead */
351#define UTF8_TWO_BYTE_HI_nocast(c) I8_TO_NATIVE_UTF8((NATIVE_TO_UNI(c) \
ee372ee9 352 >> UTF_ACCUMULATION_SHIFT) | UTF_START_MARK(2))
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353#define UTF8_TWO_BYTE_LO_nocast(c) I8_TO_NATIVE_UTF8((NATIVE_TO_UNI(c) \
354 & UTF_CONTINUATION_MASK) \
355 | UTF_CONTINUATION_MARK)
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356
357#define UTF8_TWO_BYTE_HI(c) ((U8) (UTF8_TWO_BYTE_HI_nocast(c)))
358#define UTF8_TWO_BYTE_LO(c) ((U8) (UTF8_TWO_BYTE_LO_nocast(c)))
359
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360/* This name is used when the source is a single byte (input not checked).
361 * These expand identically to the TWO_BYTE versions on ASCII platforms, but
362 * use to/from LATIN1 instead of UNI, which on EBCDIC eliminates tests */
363#define UTF8_EIGHT_BIT_HI(c) I8_TO_NATIVE_UTF8((NATIVE_TO_LATIN1(c) \
ee372ee9 364 >> UTF_ACCUMULATION_SHIFT) | UTF_START_MARK(2))
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365#define UTF8_EIGHT_BIT_LO(c) I8_TO_NATIVE_UTF8((NATIVE_TO_LATIN1(c) \
366 & UTF_CONTINUATION_MASK) \
367 | UTF_CONTINUATION_MARK)
d06134e5 368
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369/* This is illegal in any well-formed UTF-8 in both EBCDIC and ASCII
370 * as it is only in overlongs. */
371#define ILLEGAL_UTF8_BYTE I8_TO_NATIVE_UTF8(0xC1)
372
7e2040f0 373/*
e3036cf4 374 * 'UTF' is whether or not p is encoded in UTF8. The names 'foo_lazy_if' stem
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375 * from an earlier version of these macros in which they didn't call the
376 * foo_utf8() macros (i.e. were 'lazy') unless they decided that *p is the
377 * beginning of a utf8 character. Now that foo_utf8() determines that itself,
378 * no need to do it again here
7e2040f0 379 */
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380#define isIDFIRST_lazy_if(p,UTF) ((IN_BYTES || !UTF ) \
381 ? isIDFIRST(*(p)) \
382 : isIDFIRST_utf8((const U8*)p))
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383#define isWORDCHAR_lazy_if(p,UTF) ((IN_BYTES || (!UTF )) \
384 ? isWORDCHAR(*(p)) \
385 : isWORDCHAR_utf8((const U8*)p))
386#define isALNUM_lazy_if(p,UTF) isWORDCHAR_lazy_if(p,UTF)
1d72bdf6 387
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388#define UTF8_MAXLEN UTF8_MAXBYTES
389
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390/* A Unicode character can fold to up to 3 characters */
391#define UTF8_MAX_FOLD_CHAR_EXPAND 3
392
a98fe34d 393#define IN_BYTES (CopHINTS_get(PL_curcop) & HINT_BYTES)
0064a8a9 394#define DO_UTF8(sv) (SvUTF8(sv) && !IN_BYTES)
66cbab2c 395#define IN_UNI_8_BIT \
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KW
396 (CopHINTS_get(PL_curcop) & (HINT_UNI_8_BIT|HINT_LOCALE_NOT_CHARS) \
397 && ! IN_LOCALE_RUNTIME && ! IN_BYTES)
398
1d72bdf6 399
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400#define UTF8_ALLOW_EMPTY 0x0001 /* Allow a zero length string */
401
402/* Allow first byte to be a continuation byte */
1d72bdf6 403#define UTF8_ALLOW_CONTINUATION 0x0002
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404
405/* Allow second... bytes to be non-continuation bytes */
1d72bdf6 406#define UTF8_ALLOW_NON_CONTINUATION 0x0004
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407
408/* expecting more bytes than were available in the string */
409#define UTF8_ALLOW_SHORT 0x0008
410
411/* Overlong sequence; i.e., the code point can be specified in fewer bytes. */
412#define UTF8_ALLOW_LONG 0x0010
413
414#define UTF8_DISALLOW_SURROGATE 0x0020 /* Unicode surrogates */
415#define UTF8_WARN_SURROGATE 0x0040
416
417#define UTF8_DISALLOW_NONCHAR 0x0080 /* Unicode non-character */
418#define UTF8_WARN_NONCHAR 0x0100 /* code points */
419
420#define UTF8_DISALLOW_SUPER 0x0200 /* Super-set of Unicode: code */
421#define UTF8_WARN_SUPER 0x0400 /* points above the legal max */
422
423/* Code points which never were part of the original UTF-8 standard, the first
424 * byte of which is a FE or FF on ASCII platforms. */
425#define UTF8_DISALLOW_FE_FF 0x0800
426#define UTF8_WARN_FE_FF 0x1000
427
428#define UTF8_CHECK_ONLY 0x2000
429
430/* For backwards source compatibility. They do nothing, as the default now
431 * includes what they used to mean. The first one's meaning was to allow the
432 * just the single non-character 0xFFFF */
433#define UTF8_ALLOW_FFFF 0
434#define UTF8_ALLOW_SURROGATE 0
435
33d9abfb 436#define UTF8_DISALLOW_ILLEGAL_INTERCHANGE (UTF8_DISALLOW_SUPER|UTF8_DISALLOW_NONCHAR|UTF8_DISALLOW_SURROGATE|UTF8_DISALLOW_FE_FF)
949cf498 437#define UTF8_WARN_ILLEGAL_INTERCHANGE \
33d9abfb 438 (UTF8_WARN_SUPER|UTF8_WARN_NONCHAR|UTF8_WARN_SURROGATE|UTF8_WARN_FE_FF)
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KW
439#define UTF8_ALLOW_ANY \
440 (~(UTF8_DISALLOW_ILLEGAL_INTERCHANGE|UTF8_WARN_ILLEGAL_INTERCHANGE))
441#define UTF8_ALLOW_ANYUV \
442 (UTF8_ALLOW_EMPTY \
443 & ~(UTF8_DISALLOW_ILLEGAL_INTERCHANGE|UTF8_WARN_ILLEGAL_INTERCHANGE))
9f7f3913
ST
444#define UTF8_ALLOW_DEFAULT (ckWARN(WARN_UTF8) ? 0 : \
445 UTF8_ALLOW_ANYUV)
1d72bdf6 446
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447/* Surrogates, non-character code points and above-Unicode code points are
448 * problematic in some contexts. This allows code that needs to check for
449 * those to to quickly exclude the vast majority of code points it will
450 * encounter */
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451#define UTF8_FIRST_PROBLEMATIC_CODE_POINT_FIRST_BYTE \
452 FIRST_SURROGATE_UTF8_FIRST_BYTE
7131f24d 453
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454#define UTF8_IS_SURROGATE(s) cBOOL(is_SURROGATE_utf8(s))
455#define UTF8_IS_REPLACEMENT(s, send) cBOOL(is_REPLACEMENT_utf8_safe(s,send))
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456
457/* ASCII EBCDIC I8
458 * U+10FFFF: \xF4\x8F\xBF\xBF \xF9\xA1\xBF\xBF\xBF max legal Unicode
459 * U+110000: \xF4\x90\x80\x80 \xF9\xA2\xA0\xA0\xA0
460 * U+110001: \xF4\x90\x80\x81 \xF9\xA2\xA0\xA0\xA1
461 */
462#ifdef EBCDIC /* Both versions assume well-formed UTF8 */
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463# define UTF8_IS_SUPER(s) (NATIVE_UTF8_TO_I8(* (U8*) (s)) >= 0xF9 \
464 && (NATIVE_UTF8_TO_I8(* (U8*) (s)) > 0xF9 \
a3481822 465 || (NATIVE_UTF8_TO_I8(* ((U8*) (s) + 1)) >= 0xA2)))
7131f24d 466#else
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467# define UTF8_IS_SUPER(s) (*(U8*) (s) >= 0xF4 \
468 && (*(U8*) (s) > 0xF4 || (*((U8*) (s) + 1) >= 0x90)))
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469#endif
470
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471/* These are now machine generated, and the 'given' clause is no longer
472 * applicable */
473#define UTF8_IS_NONCHAR_GIVEN_THAT_NON_SUPER_AND_GE_PROBLEMATIC(s) \
474 cBOOL(is_NONCHAR_utf8(s))
475#define UTF8_IS_NONCHAR_(s) \
476 UTF8_IS_NONCHAR_GIVEN_THAT_NON_SUPER_AND_GE_PROBLEMATIC(s)
7131f24d 477
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JH
478#define UNICODE_SURROGATE_FIRST 0xD800
479#define UNICODE_SURROGATE_LAST 0xDFFF
480#define UNICODE_REPLACEMENT 0xFFFD
481#define UNICODE_BYTE_ORDER_MARK 0xFEFF
1d72bdf6 482
b851fbc1 483/* Though our UTF-8 encoding can go beyond this,
c76687c5 484 * let's be conservative and do as Unicode says. */
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JH
485#define PERL_UNICODE_MAX 0x10FFFF
486
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KW
487#define UNICODE_WARN_SURROGATE 0x0001 /* UTF-16 surrogates */
488#define UNICODE_WARN_NONCHAR 0x0002 /* Non-char code points */
489#define UNICODE_WARN_SUPER 0x0004 /* Above 0x10FFFF */
490#define UNICODE_WARN_FE_FF 0x0008 /* Above 0x10FFFF */
491#define UNICODE_DISALLOW_SURROGATE 0x0010
492#define UNICODE_DISALLOW_NONCHAR 0x0020
493#define UNICODE_DISALLOW_SUPER 0x0040
494#define UNICODE_DISALLOW_FE_FF 0x0080
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495#define UNICODE_WARN_ILLEGAL_INTERCHANGE \
496 (UNICODE_WARN_SURROGATE|UNICODE_WARN_NONCHAR|UNICODE_WARN_SUPER)
497#define UNICODE_DISALLOW_ILLEGAL_INTERCHANGE \
498 (UNICODE_DISALLOW_SURROGATE|UNICODE_DISALLOW_NONCHAR|UNICODE_DISALLOW_SUPER)
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499
500/* For backward source compatibility, as are now the default */
501#define UNICODE_ALLOW_SURROGATE 0
502#define UNICODE_ALLOW_SUPER 0
503#define UNICODE_ALLOW_ANY 0
b851fbc1 504
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NIS
505#define UNICODE_IS_SURROGATE(c) ((c) >= UNICODE_SURROGATE_FIRST && \
506 (c) <= UNICODE_SURROGATE_LAST)
a10ec373 507#define UNICODE_IS_REPLACEMENT(c) ((c) == UNICODE_REPLACEMENT)
872c91ae 508#define UNICODE_IS_BYTE_ORDER_MARK(c) ((c) == UNICODE_BYTE_ORDER_MARK)
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509#define UNICODE_IS_NONCHAR(c) ((c >= 0xFDD0 && c <= 0xFDEF) \
510 /* The other noncharacters end in FFFE or FFFF, which \
511 * the mask below catches both of, but beyond the last \
512 * official unicode code point, they aren't \
513 * noncharacters, since those aren't Unicode \
514 * characters at all */ \
515 || ((((c & 0xFFFE) == 0xFFFE)) && ! UNICODE_IS_SUPER(c)))
516#define UNICODE_IS_SUPER(c) ((c) > PERL_UNICODE_MAX)
517#define UNICODE_IS_FE_FF(c) ((c) > 0x7FFFFFFF)
1d72bdf6 518
f067b878
NA
519#ifdef HAS_QUAD
520# define UTF8_QUAD_MAX UINT64_C(0x1000000000)
521#endif
3bd709b1 522
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523#define LATIN_SMALL_LETTER_SHARP_S LATIN_SMALL_LETTER_SHARP_S_NATIVE
524#define LATIN_SMALL_LETTER_Y_WITH_DIAERESIS \
525 LATIN_SMALL_LETTER_Y_WITH_DIAERESIS_NATIVE
526#define MICRO_SIGN MICRO_SIGN_NATIVE
527#define LATIN_CAPITAL_LETTER_A_WITH_RING_ABOVE \
528 LATIN_CAPITAL_LETTER_A_WITH_RING_ABOVE_NATIVE
529#define LATIN_SMALL_LETTER_A_WITH_RING_ABOVE \
530 LATIN_SMALL_LETTER_A_WITH_RING_ABOVE_NATIVE
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JH
531#define UNICODE_GREEK_CAPITAL_LETTER_SIGMA 0x03A3
532#define UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA 0x03C2
533#define UNICODE_GREEK_SMALL_LETTER_SIGMA 0x03C3
9dcbe121 534#define GREEK_SMALL_LETTER_MU 0x03BC
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KW
535#define GREEK_CAPITAL_LETTER_MU 0x039C /* Upper and title case
536 of MICRON */
537#define LATIN_CAPITAL_LETTER_Y_WITH_DIAERESIS 0x0178 /* Also is title case */
538#define LATIN_CAPITAL_LETTER_SHARP_S 0x1E9E
539#define LATIN_SMALL_LETTER_LONG_S 0x017F
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KW
540#define LATIN_SMALL_LIGATURE_LONG_S_T 0xFB05
541#define LATIN_SMALL_LIGATURE_ST 0xFB06
9e682c18
KW
542#define KELVIN_SIGN 0x212A
543#define ANGSTROM_SIGN 0x212B
09091399 544
9e55ce06 545#define UNI_DISPLAY_ISPRINT 0x0001
c728cb41
JH
546#define UNI_DISPLAY_BACKSLASH 0x0002
547#define UNI_DISPLAY_QQ (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
548#define UNI_DISPLAY_REGEX (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
9e55ce06 549
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550#define ANYOF_FOLD_SHARP_S(node, input, end) \
551 (ANYOF_BITMAP_TEST(node, LATIN_SMALL_LETTER_SHARP_S) && \
137165a6 552 (ANYOF_NONBITMAP(node)) && \
39065660 553 (ANYOF_FLAGS(node) & ANYOF_LOC_NONBITMAP_FOLD) && \
07b6858f 554 ((end) > (input) + 1) && \
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KW
555 toFOLD((input)[0]) == 's' && \
556 toFOLD((input)[1]) == 's')
ebc501f0 557#define SHARP_S_SKIP 2
3b0fc154 558
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KW
559/* If you want to exclude surrogates, and beyond legal Unicode, see the blame
560 * log for earlier versions which gave details for these */
4d646140
KW
561
562#ifndef EBCDIC
563/* This was generated by regen/regcharclass.pl, and then moved here. The lines
564 * that generated it were then commented out. This was done solely because it
565 * takes on the order of 10 minutes to generate, and is never going to change.
566 * The EBCDIC equivalent hasn't been commented out in regcharclass.pl, so it
567 * should generate and run the correct stuff */
39a0f513
YO
568/*
569 UTF8_CHAR: Matches utf8 from 1 to 4 bytes
570
571 0x0 - 0x1FFFFF
572*/
4d646140
KW
573/*** GENERATED CODE ***/
574#define is_UTF8_CHAR_utf8_safe(s,e) \
575( ((e)-(s) > 3) ? \
576 ( ( ( ((U8*)s)[0] & 0x80 ) == 0x00 ) ? 1 \
577 : ( 0xC2 <= ((U8*)s)[0] && ((U8*)s)[0] <= 0xDF ) ? \
578 ( ( ( ((U8*)s)[1] & 0xC0 ) == 0x80 ) ? 2 : 0 ) \
579 : ( 0xE0 == ((U8*)s)[0] ) ? \
580 ( ( ( ( ((U8*)s)[1] & 0xE0 ) == 0xA0 ) && ( ( ((U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\
581 : ( 0xE1 <= ((U8*)s)[0] && ((U8*)s)[0] <= 0xEF ) ? \
582 ( ( ( ( ((U8*)s)[1] & 0xC0 ) == 0x80 ) && ( ( ((U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\
583 : ( 0xF0 == ((U8*)s)[0] ) ? \
584 ( ( ( ( 0x90 <= ((U8*)s)[1] && ((U8*)s)[1] <= 0xBF ) && ( ( ((U8*)s)[2] & 0xC0 ) == 0x80 ) ) && ( ( ((U8*)s)[3] & 0xC0 ) == 0x80 ) ) ? 4 : 0 )\
39a0f513 585 : ( ( ( ( 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
586: ((e)-(s) > 2) ? \
587 ( ( ( ((U8*)s)[0] & 0x80 ) == 0x00 ) ? 1 \
588 : ( 0xC2 <= ((U8*)s)[0] && ((U8*)s)[0] <= 0xDF ) ? \
589 ( ( ( ((U8*)s)[1] & 0xC0 ) == 0x80 ) ? 2 : 0 ) \
590 : ( 0xE0 == ((U8*)s)[0] ) ? \
591 ( ( ( ( ((U8*)s)[1] & 0xE0 ) == 0xA0 ) && ( ( ((U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\
39a0f513 592 : ( ( ( 0xE1 <= ((U8*)s)[0] && ((U8*)s)[0] <= 0xEF ) && ( ( ((U8*)s)[1] & 0xC0 ) == 0x80 ) ) && ( ( ((U8*)s)[2] & 0xC0 ) == 0x80 ) ) ? 3 : 0 )\
4d646140
KW
593: ((e)-(s) > 1) ? \
594 ( ( ( ((U8*)s)[0] & 0x80 ) == 0x00 ) ? 1 \
39a0f513 595 : ( ( 0xC2 <= ((U8*)s)[0] && ((U8*)s)[0] <= 0xDF ) && ( ( ((U8*)s)[1] & 0xC0 ) == 0x80 ) ) ? 2 : 0 )\
4d646140
KW
596: ((e)-(s) > 0) ? \
597 ( ( ((U8*)s)[0] & 0x80 ) == 0x00 ) \
598: 0 )
599#endif
3b0fc154
JH
600
601/* IS_UTF8_CHAR(p) is strictly speaking wrong (not UTF-8) because it
602 * (1) allows UTF-8 encoded UTF-16 surrogates
603 * (2) it allows code points past U+10FFFF.
604 * The Perl_is_utf8_char() full "slow" code will handle the Perl
605 * "extended UTF-8". */
4d646140 606#define IS_UTF8_CHAR(p, n) (is_UTF8_CHAR_utf8_safe(p, (p) + (n)) == n)
2f454f11 607
4d646140
KW
608/* regen/regcharclass.pl generates is_UTF8_CHAR_utf8_safe() macros for up to
609 * these number of bytes. So this has to be coordinated with it */
610#ifdef EBCDIC
2f454f11 611# define IS_UTF8_CHAR_FAST(n) ((n) <= 5)
4d646140
KW
612#else
613# define IS_UTF8_CHAR_FAST(n) ((n) <= 4)
614#endif
e9a8c099 615
57f0e7e2
KW
616#endif /* H_UTF8 */
617
e9a8c099
MHM
618/*
619 * Local variables:
620 * c-indentation-style: bsd
621 * c-basic-offset: 4
14d04a33 622 * indent-tabs-mode: nil
e9a8c099
MHM
623 * End:
624 *
14d04a33 625 * ex: set ts=8 sts=4 sw=4 et:
e9a8c099 626 */