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a0ed51b3 LW |
1 | /* utf8.c |
2 | * | |
1129b882 | 3 | * Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
b94e2f88 | 4 | * 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 | ||
11 | /* | |
4ac71550 TC |
12 | * 'What a fix!' said Sam. 'That's the one place in all the lands we've ever |
13 | * heard of that we don't want to see any closer; and that's the one place | |
14 | * we're trying to get to! And that's just where we can't get, nohow.' | |
15 | * | |
cdad3b53 | 16 | * [p.603 of _The Lord of the Rings_, IV/I: "The Taming of Sméagol"] |
a0ed51b3 LW |
17 | * |
18 | * 'Well do I understand your speech,' he answered in the same language; | |
19 | * 'yet few strangers do so. Why then do you not speak in the Common Tongue, | |
4ac71550 | 20 | * as is the custom in the West, if you wish to be answered?' |
cdad3b53 | 21 | * --Gandalf, addressing Théoden's door wardens |
4ac71550 TC |
22 | * |
23 | * [p.508 of _The Lord of the Rings_, III/vi: "The King of the Golden Hall"] | |
a0ed51b3 LW |
24 | * |
25 | * ...the travellers perceived that the floor was paved with stones of many | |
26 | * hues; branching runes and strange devices intertwined beneath their feet. | |
4ac71550 TC |
27 | * |
28 | * [p.512 of _The Lord of the Rings_, III/vi: "The King of the Golden Hall"] | |
a0ed51b3 LW |
29 | */ |
30 | ||
31 | #include "EXTERN.h" | |
864dbfa3 | 32 | #define PERL_IN_UTF8_C |
a0ed51b3 | 33 | #include "perl.h" |
b992490d | 34 | #include "invlist_inline.h" |
a0ed51b3 | 35 | |
806547a7 | 36 | static const char malformed_text[] = "Malformed UTF-8 character"; |
27da23d5 | 37 | static const char unees[] = |
806547a7 | 38 | "Malformed UTF-8 character (unexpected end of string)"; |
fb7e7255 KW |
39 | |
40 | /* Be sure to synchronize this message with the similar one in regcomp.c */ | |
760c7c2f | 41 | static const char cp_above_legal_max[] = |
d22ec717 KW |
42 | "Use of code point 0x%" UVXf " is not allowed; the" |
43 | " permissible max is 0x%" UVXf; | |
760c7c2f | 44 | |
48ef279e | 45 | /* |
ccfc67b7 | 46 | =head1 Unicode Support |
7fefc6c1 | 47 | These are various utility functions for manipulating UTF8-encoded |
72d33970 | 48 | strings. For the uninitiated, this is a method of representing arbitrary |
61296642 | 49 | Unicode characters as a variable number of bytes, in such a way that |
56da48f7 DM |
50 | characters in the ASCII range are unmodified, and a zero byte never appears |
51 | within non-zero characters. | |
166f8a29 | 52 | |
eaf7a4d2 CS |
53 | =cut |
54 | */ | |
55 | ||
dd051059 DM |
56 | /* helper for Perl__force_out_malformed_utf8_message(). Like |
57 | * SAVECOMPILEWARNINGS(), but works with PL_curcop rather than | |
58 | * PL_compiling */ | |
59 | ||
60 | static void | |
61 | S_restore_cop_warnings(pTHX_ void *p) | |
62 | { | |
63 | if (!specialWARN(PL_curcop->cop_warnings)) | |
64 | PerlMemShared_free(PL_curcop->cop_warnings); | |
65 | PL_curcop->cop_warnings = (STRLEN*)p; | |
66 | } | |
67 | ||
68 | ||
9cbfb8ab KW |
69 | void |
70 | Perl__force_out_malformed_utf8_message(pTHX_ | |
71 | const U8 *const p, /* First byte in UTF-8 sequence */ | |
72 | const U8 * const e, /* Final byte in sequence (may include | |
73 | multiple chars */ | |
74 | const U32 flags, /* Flags to pass to utf8n_to_uvchr(), | |
75 | usually 0, or some DISALLOW flags */ | |
76 | const bool die_here) /* If TRUE, this function does not return */ | |
77 | { | |
78 | /* This core-only function is to be called when a malformed UTF-8 character | |
79 | * is found, in order to output the detailed information about the | |
80 | * malformation before dieing. The reason it exists is for the occasions | |
81 | * when such a malformation is fatal, but warnings might be turned off, so | |
82 | * that normally they would not be actually output. This ensures that they | |
83 | * do get output. Because a sequence may be malformed in more than one | |
84 | * way, multiple messages may be generated, so we can't make them fatal, as | |
85 | * that would cause the first one to die. | |
86 | * | |
87 | * Instead we pretend -W was passed to perl, then die afterwards. The | |
88 | * flexibility is here to return to the caller so they can finish up and | |
89 | * die themselves */ | |
90 | U32 errors; | |
91 | ||
92 | PERL_ARGS_ASSERT__FORCE_OUT_MALFORMED_UTF8_MESSAGE; | |
93 | ||
94 | ENTER; | |
c15a80f3 | 95 | SAVEI8(PL_dowarn); |
9cbfb8ab KW |
96 | SAVESPTR(PL_curcop); |
97 | ||
98 | PL_dowarn = G_WARN_ALL_ON|G_WARN_ON; | |
99 | if (PL_curcop) { | |
dd051059 DM |
100 | /* this is like SAVECOMPILEWARNINGS() except with PL_curcop rather |
101 | * than PL_compiling */ | |
102 | SAVEDESTRUCTOR_X(S_restore_cop_warnings, | |
103 | (void*)PL_curcop->cop_warnings); | |
9cbfb8ab KW |
104 | PL_curcop->cop_warnings = pWARN_ALL; |
105 | } | |
106 | ||
107 | (void) utf8n_to_uvchr_error(p, e - p, NULL, flags & ~UTF8_CHECK_ONLY, &errors); | |
108 | ||
109 | LEAVE; | |
110 | ||
111 | if (! errors) { | |
112 | Perl_croak(aTHX_ "panic: _force_out_malformed_utf8_message should" | |
113 | " be called only when there are errors found"); | |
114 | } | |
115 | ||
116 | if (die_here) { | |
117 | Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)"); | |
118 | } | |
119 | } | |
120 | ||
bb07812e KW |
121 | STATIC HV * |
122 | S_new_msg_hv(pTHX_ const char * const message, /* The message text */ | |
123 | U32 categories, /* Packed warning categories */ | |
124 | U32 flag) /* Flag associated with this message */ | |
125 | { | |
126 | /* Creates, populates, and returns an HV* that describes an error message | |
127 | * for the translators between UTF8 and code point */ | |
128 | ||
129 | SV* msg_sv = newSVpv(message, 0); | |
130 | SV* category_sv = newSVuv(categories); | |
131 | SV* flag_bit_sv = newSVuv(flag); | |
132 | ||
133 | HV* msg_hv = newHV(); | |
134 | ||
135 | PERL_ARGS_ASSERT_NEW_MSG_HV; | |
136 | ||
2b672cf5 KW |
137 | (void) hv_stores(msg_hv, "text", msg_sv); |
138 | (void) hv_stores(msg_hv, "warn_categories", category_sv); | |
139 | (void) hv_stores(msg_hv, "flag_bit", flag_bit_sv); | |
bb07812e KW |
140 | |
141 | return msg_hv; | |
142 | } | |
143 | ||
eaf7a4d2 | 144 | /* |
378516de | 145 | =for apidoc uvoffuni_to_utf8_flags |
eebe1485 | 146 | |
a27992cc | 147 | THIS FUNCTION SHOULD BE USED IN ONLY VERY SPECIALIZED CIRCUMSTANCES. |
de69f3af KW |
148 | Instead, B<Almost all code should use L</uvchr_to_utf8> or |
149 | L</uvchr_to_utf8_flags>>. | |
a27992cc | 150 | |
de69f3af KW |
151 | This function is like them, but the input is a strict Unicode |
152 | (as opposed to native) code point. Only in very rare circumstances should code | |
153 | not be using the native code point. | |
949cf498 | 154 | |
efa9cd84 | 155 | For details, see the description for L</uvchr_to_utf8_flags>. |
949cf498 | 156 | |
eebe1485 SC |
157 | =cut |
158 | */ | |
159 | ||
33f38593 KW |
160 | U8 * |
161 | Perl_uvoffuni_to_utf8_flags(pTHX_ U8 *d, UV uv, const UV flags) | |
162 | { | |
163 | PERL_ARGS_ASSERT_UVOFFUNI_TO_UTF8_FLAGS; | |
164 | ||
165 | return uvoffuni_to_utf8_flags_msgs(d, uv, flags, NULL); | |
166 | } | |
167 | ||
c94c2f39 KW |
168 | /* All these formats take a single UV code point argument */ |
169 | const char surrogate_cp_format[] = "UTF-16 surrogate U+%04" UVXf; | |
170 | const char nonchar_cp_format[] = "Unicode non-character U+%04" UVXf | |
171 | " is not recommended for open interchange"; | |
172 | const char super_cp_format[] = "Code point 0x%" UVXf " is not Unicode," | |
173 | " may not be portable"; | |
57ff5f59 KW |
174 | const char perl_extended_cp_format[] = "Code point 0x%" UVXf " is not" \ |
175 | " Unicode, requires a Perl extension," \ | |
176 | " and so is not portable"; | |
c94c2f39 | 177 | |
33f38593 | 178 | #define HANDLE_UNICODE_SURROGATE(uv, flags, msgs) \ |
8ee1cdcb KW |
179 | STMT_START { \ |
180 | if (flags & UNICODE_WARN_SURROGATE) { \ | |
33f38593 KW |
181 | U32 category = packWARN(WARN_SURROGATE); \ |
182 | const char * format = surrogate_cp_format; \ | |
183 | if (msgs) { \ | |
184 | *msgs = new_msg_hv(Perl_form(aTHX_ format, uv), \ | |
185 | category, \ | |
186 | UNICODE_GOT_SURROGATE); \ | |
187 | } \ | |
188 | else { \ | |
189 | Perl_ck_warner_d(aTHX_ category, format, uv); \ | |
190 | } \ | |
8ee1cdcb KW |
191 | } \ |
192 | if (flags & UNICODE_DISALLOW_SURROGATE) { \ | |
193 | return NULL; \ | |
194 | } \ | |
195 | } STMT_END; | |
196 | ||
33f38593 | 197 | #define HANDLE_UNICODE_NONCHAR(uv, flags, msgs) \ |
8ee1cdcb KW |
198 | STMT_START { \ |
199 | if (flags & UNICODE_WARN_NONCHAR) { \ | |
33f38593 KW |
200 | U32 category = packWARN(WARN_NONCHAR); \ |
201 | const char * format = nonchar_cp_format; \ | |
202 | if (msgs) { \ | |
203 | *msgs = new_msg_hv(Perl_form(aTHX_ format, uv), \ | |
204 | category, \ | |
205 | UNICODE_GOT_NONCHAR); \ | |
206 | } \ | |
207 | else { \ | |
208 | Perl_ck_warner_d(aTHX_ category, format, uv); \ | |
209 | } \ | |
8ee1cdcb KW |
210 | } \ |
211 | if (flags & UNICODE_DISALLOW_NONCHAR) { \ | |
212 | return NULL; \ | |
213 | } \ | |
214 | } STMT_END; | |
215 | ||
ba6ed43c KW |
216 | /* Use shorter names internally in this file */ |
217 | #define SHIFT UTF_ACCUMULATION_SHIFT | |
218 | #undef MARK | |
219 | #define MARK UTF_CONTINUATION_MARK | |
220 | #define MASK UTF_CONTINUATION_MASK | |
221 | ||
33f38593 KW |
222 | /* |
223 | =for apidoc uvchr_to_utf8_flags_msgs | |
224 | ||
225 | THIS FUNCTION SHOULD BE USED IN ONLY VERY SPECIALIZED CIRCUMSTANCES. | |
226 | ||
227 | Most code should use C<L</uvchr_to_utf8_flags>()> rather than call this directly. | |
228 | ||
229 | This function is for code that wants any warning and/or error messages to be | |
230 | returned to the caller rather than be displayed. All messages that would have | |
884a31ee | 231 | been displayed if all lexical warnings are enabled will be returned. |
33f38593 KW |
232 | |
233 | It is just like C<L</uvchr_to_utf8_flags>> but it takes an extra parameter | |
234 | placed after all the others, C<msgs>. If this parameter is 0, this function | |
235 | behaves identically to C<L</uvchr_to_utf8_flags>>. Otherwise, C<msgs> should | |
236 | be a pointer to an C<HV *> variable, in which this function creates a new HV to | |
237 | contain any appropriate messages. The hash has three key-value pairs, as | |
238 | follows: | |
239 | ||
240 | =over 4 | |
241 | ||
242 | =item C<text> | |
243 | ||
244 | The text of the message as a C<SVpv>. | |
245 | ||
246 | =item C<warn_categories> | |
247 | ||
248 | The warning category (or categories) packed into a C<SVuv>. | |
249 | ||
250 | =item C<flag> | |
251 | ||
252 | A single flag bit associated with this message, in a C<SVuv>. | |
253 | The bit corresponds to some bit in the C<*errors> return value, | |
254 | such as C<UNICODE_GOT_SURROGATE>. | |
255 | ||
256 | =back | |
257 | ||
258 | It's important to note that specifying this parameter as non-null will cause | |
259 | any warnings this function would otherwise generate to be suppressed, and | |
260 | instead be placed in C<*msgs>. The caller can check the lexical warnings state | |
261 | (or not) when choosing what to do with the returned messages. | |
262 | ||
263 | The caller, of course, is responsible for freeing any returned HV. | |
264 | ||
265 | =cut | |
266 | */ | |
267 | ||
268 | /* Undocumented; we don't want people using this. Instead they should use | |
269 | * uvchr_to_utf8_flags_msgs() */ | |
dfe13c55 | 270 | U8 * |
33f38593 | 271 | Perl_uvoffuni_to_utf8_flags_msgs(pTHX_ U8 *d, UV uv, const UV flags, HV** msgs) |
a0ed51b3 | 272 | { |
33f38593 KW |
273 | PERL_ARGS_ASSERT_UVOFFUNI_TO_UTF8_FLAGS_MSGS; |
274 | ||
275 | if (msgs) { | |
276 | *msgs = NULL; | |
277 | } | |
7918f24d | 278 | |
2d1545e5 | 279 | if (OFFUNI_IS_INVARIANT(uv)) { |
4c8cd605 | 280 | *d++ = LATIN1_TO_NATIVE(uv); |
d9432125 KW |
281 | return d; |
282 | } | |
facc1dc2 | 283 | |
3ea68d71 | 284 | if (uv <= MAX_UTF8_TWO_BYTE) { |
facc1dc2 KW |
285 | *d++ = I8_TO_NATIVE_UTF8(( uv >> SHIFT) | UTF_START_MARK(2)); |
286 | *d++ = I8_TO_NATIVE_UTF8(( uv & MASK) | MARK); | |
3ea68d71 KW |
287 | return d; |
288 | } | |
d9432125 | 289 | |
ba6ed43c KW |
290 | /* Not 2-byte; test for and handle 3-byte result. In the test immediately |
291 | * below, the 16 is for start bytes E0-EF (which are all the possible ones | |
292 | * for 3 byte characters). The 2 is for 2 continuation bytes; these each | |
293 | * contribute SHIFT bits. This yields 0x4000 on EBCDIC platforms, 0x1_0000 | |
294 | * on ASCII; so 3 bytes covers the range 0x400-0x3FFF on EBCDIC; | |
295 | * 0x800-0xFFFF on ASCII */ | |
296 | if (uv < (16 * (1U << (2 * SHIFT)))) { | |
297 | *d++ = I8_TO_NATIVE_UTF8(( uv >> ((3 - 1) * SHIFT)) | UTF_START_MARK(3)); | |
298 | *d++ = I8_TO_NATIVE_UTF8(((uv >> ((2 - 1) * SHIFT)) & MASK) | MARK); | |
299 | *d++ = I8_TO_NATIVE_UTF8(( uv /* (1 - 1) */ & MASK) | MARK); | |
300 | ||
301 | #ifndef EBCDIC /* These problematic code points are 4 bytes on EBCDIC, so | |
302 | aren't tested here */ | |
303 | /* The most likely code points in this range are below the surrogates. | |
304 | * Do an extra test to quickly exclude those. */ | |
305 | if (UNLIKELY(uv >= UNICODE_SURROGATE_FIRST)) { | |
306 | if (UNLIKELY( UNICODE_IS_32_CONTIGUOUS_NONCHARS(uv) | |
307 | || UNICODE_IS_END_PLANE_NONCHAR_GIVEN_NOT_SUPER(uv))) | |
308 | { | |
33f38593 | 309 | HANDLE_UNICODE_NONCHAR(uv, flags, msgs); |
8ee1cdcb KW |
310 | } |
311 | else if (UNLIKELY(UNICODE_IS_SURROGATE(uv))) { | |
33f38593 | 312 | HANDLE_UNICODE_SURROGATE(uv, flags, msgs); |
760c7c2f | 313 | } |
ba6ed43c KW |
314 | } |
315 | #endif | |
316 | return d; | |
317 | } | |
318 | ||
319 | /* Not 3-byte; that means the code point is at least 0x1_0000 on ASCII | |
320 | * platforms, and 0x4000 on EBCDIC. There are problematic cases that can | |
321 | * happen starting with 4-byte characters on ASCII platforms. We unify the | |
322 | * code for these with EBCDIC, even though some of them require 5-bytes on | |
323 | * those, because khw believes the code saving is worth the very slight | |
324 | * performance hit on these high EBCDIC code points. */ | |
325 | ||
326 | if (UNLIKELY(UNICODE_IS_SUPER(uv))) { | |
40606899 KW |
327 | if (UNLIKELY(uv > MAX_LEGAL_CP)) { |
328 | Perl_croak(aTHX_ cp_above_legal_max, uv, MAX_LEGAL_CP); | |
a5bf80e0 | 329 | } |
33f38593 KW |
330 | if ( (flags & UNICODE_WARN_SUPER) |
331 | || ( (flags & UNICODE_WARN_PERL_EXTENDED) | |
0a8a1a5b | 332 | && UNICODE_IS_PERL_EXTENDED(uv))) |
a5bf80e0 | 333 | { |
33f38593 KW |
334 | const char * format = super_cp_format; |
335 | U32 category = packWARN(WARN_NON_UNICODE); | |
336 | U32 flag = UNICODE_GOT_SUPER; | |
337 | ||
338 | /* Choose the more dire applicable warning */ | |
339 | if (UNICODE_IS_PERL_EXTENDED(uv)) { | |
340 | format = perl_extended_cp_format; | |
341 | if (flags & (UNICODE_WARN_PERL_EXTENDED | |
342 | |UNICODE_DISALLOW_PERL_EXTENDED)) | |
343 | { | |
344 | flag = UNICODE_GOT_PERL_EXTENDED; | |
345 | } | |
346 | } | |
a5bf80e0 | 347 | |
33f38593 KW |
348 | if (msgs) { |
349 | *msgs = new_msg_hv(Perl_form(aTHX_ format, uv), | |
350 | category, flag); | |
351 | } | |
352 | else { | |
353 | Perl_ck_warner_d(aTHX_ packWARN(WARN_NON_UNICODE), format, uv); | |
354 | } | |
a5bf80e0 | 355 | } |
56576a04 | 356 | if ( (flags & UNICODE_DISALLOW_SUPER) |
0a8a1a5b KW |
357 | || ( (flags & UNICODE_DISALLOW_PERL_EXTENDED) |
358 | && UNICODE_IS_PERL_EXTENDED(uv))) | |
a5bf80e0 KW |
359 | { |
360 | return NULL; | |
361 | } | |
362 | } | |
ba6ed43c | 363 | else if (UNLIKELY(UNICODE_IS_END_PLANE_NONCHAR_GIVEN_NOT_SUPER(uv))) { |
33f38593 | 364 | HANDLE_UNICODE_NONCHAR(uv, flags, msgs); |
507b9800 | 365 | } |
d9432125 | 366 | |
ba6ed43c KW |
367 | /* Test for and handle 4-byte result. In the test immediately below, the |
368 | * 8 is for start bytes F0-F7 (which are all the possible ones for 4 byte | |
369 | * characters). The 3 is for 3 continuation bytes; these each contribute | |
370 | * SHIFT bits. This yields 0x4_0000 on EBCDIC platforms, 0x20_0000 on | |
371 | * ASCII, so 4 bytes covers the range 0x4000-0x3_FFFF on EBCDIC; | |
372 | * 0x1_0000-0x1F_FFFF on ASCII */ | |
373 | if (uv < (8 * (1U << (3 * SHIFT)))) { | |
374 | *d++ = I8_TO_NATIVE_UTF8(( uv >> ((4 - 1) * SHIFT)) | UTF_START_MARK(4)); | |
375 | *d++ = I8_TO_NATIVE_UTF8(((uv >> ((3 - 1) * SHIFT)) & MASK) | MARK); | |
376 | *d++ = I8_TO_NATIVE_UTF8(((uv >> ((2 - 1) * SHIFT)) & MASK) | MARK); | |
377 | *d++ = I8_TO_NATIVE_UTF8(( uv /* (1 - 1) */ & MASK) | MARK); | |
378 | ||
379 | #ifdef EBCDIC /* These were handled on ASCII platforms in the code for 3-byte | |
380 | characters. The end-plane non-characters for EBCDIC were | |
381 | handled just above */ | |
382 | if (UNLIKELY(UNICODE_IS_32_CONTIGUOUS_NONCHARS(uv))) { | |
33f38593 | 383 | HANDLE_UNICODE_NONCHAR(uv, flags, msgs); |
d528804a | 384 | } |
ba6ed43c | 385 | else if (UNLIKELY(UNICODE_IS_SURROGATE(uv))) { |
33f38593 | 386 | HANDLE_UNICODE_SURROGATE(uv, flags, msgs); |
ba6ed43c KW |
387 | } |
388 | #endif | |
389 | ||
390 | return d; | |
391 | } | |
392 | ||
393 | /* Not 4-byte; that means the code point is at least 0x20_0000 on ASCII | |
394 | * platforms, and 0x4000 on EBCDIC. At this point we switch to a loop | |
395 | * format. The unrolled version above turns out to not save all that much | |
396 | * time, and at these high code points (well above the legal Unicode range | |
397 | * on ASCII platforms, and well above anything in common use in EBCDIC), | |
398 | * khw believes that less code outweighs slight performance gains. */ | |
399 | ||
d9432125 | 400 | { |
5aaebcb3 | 401 | STRLEN len = OFFUNISKIP(uv); |
1d72bdf6 NIS |
402 | U8 *p = d+len-1; |
403 | while (p > d) { | |
957a9e81 KW |
404 | *p-- = I8_TO_NATIVE_UTF8((uv & MASK) | MARK); |
405 | uv >>= SHIFT; | |
1d72bdf6 | 406 | } |
4c8cd605 | 407 | *p = I8_TO_NATIVE_UTF8((uv & UTF_START_MASK(len)) | UTF_START_MARK(len)); |
1d72bdf6 NIS |
408 | return d+len; |
409 | } | |
a0ed51b3 | 410 | } |
a5bf80e0 | 411 | |
646ca15d | 412 | /* |
07693fe6 KW |
413 | =for apidoc uvchr_to_utf8 |
414 | ||
bcb1a2d4 | 415 | Adds the UTF-8 representation of the native code point C<uv> to the end |
f2fc1b45 | 416 | of the string C<d>; C<d> should have at least C<UVCHR_SKIP(uv)+1> (up to |
c749c9fd KW |
417 | C<UTF8_MAXBYTES+1>) free bytes available. The return value is the pointer to |
418 | the byte after the end of the new character. In other words, | |
07693fe6 KW |
419 | |
420 | d = uvchr_to_utf8(d, uv); | |
421 | ||
422 | is the recommended wide native character-aware way of saying | |
423 | ||
424 | *(d++) = uv; | |
425 | ||
d22ec717 KW |
426 | This function accepts any code point from 0..C<IV_MAX> as input. |
427 | C<IV_MAX> is typically 0x7FFF_FFFF in a 32-bit word. | |
760c7c2f KW |
428 | |
429 | It is possible to forbid or warn on non-Unicode code points, or those that may | |
430 | be problematic by using L</uvchr_to_utf8_flags>. | |
de69f3af | 431 | |
07693fe6 KW |
432 | =cut |
433 | */ | |
434 | ||
de69f3af KW |
435 | /* This is also a macro */ |
436 | PERL_CALLCONV U8* Perl_uvchr_to_utf8(pTHX_ U8 *d, UV uv); | |
437 | ||
07693fe6 KW |
438 | U8 * |
439 | Perl_uvchr_to_utf8(pTHX_ U8 *d, UV uv) | |
440 | { | |
de69f3af | 441 | return uvchr_to_utf8(d, uv); |
07693fe6 KW |
442 | } |
443 | ||
de69f3af KW |
444 | /* |
445 | =for apidoc uvchr_to_utf8_flags | |
446 | ||
447 | Adds the UTF-8 representation of the native code point C<uv> to the end | |
f2fc1b45 | 448 | of the string C<d>; C<d> should have at least C<UVCHR_SKIP(uv)+1> (up to |
c749c9fd KW |
449 | C<UTF8_MAXBYTES+1>) free bytes available. The return value is the pointer to |
450 | the byte after the end of the new character. In other words, | |
de69f3af KW |
451 | |
452 | d = uvchr_to_utf8_flags(d, uv, flags); | |
453 | ||
454 | or, in most cases, | |
455 | ||
456 | d = uvchr_to_utf8_flags(d, uv, 0); | |
457 | ||
458 | This is the Unicode-aware way of saying | |
459 | ||
460 | *(d++) = uv; | |
461 | ||
d22ec717 KW |
462 | If C<flags> is 0, this function accepts any code point from 0..C<IV_MAX> as |
463 | input. C<IV_MAX> is typically 0x7FFF_FFFF in a 32-bit word. | |
760c7c2f KW |
464 | |
465 | Specifying C<flags> can further restrict what is allowed and not warned on, as | |
466 | follows: | |
de69f3af | 467 | |
796b6530 | 468 | If C<uv> is a Unicode surrogate code point and C<UNICODE_WARN_SURROGATE> is set, |
7ee537e6 KW |
469 | the function will raise a warning, provided UTF8 warnings are enabled. If |
470 | instead C<UNICODE_DISALLOW_SURROGATE> is set, the function will fail and return | |
471 | NULL. If both flags are set, the function will both warn and return NULL. | |
de69f3af | 472 | |
760c7c2f KW |
473 | Similarly, the C<UNICODE_WARN_NONCHAR> and C<UNICODE_DISALLOW_NONCHAR> flags |
474 | affect how the function handles a Unicode non-character. | |
93e6dbd6 | 475 | |
760c7c2f KW |
476 | And likewise, the C<UNICODE_WARN_SUPER> and C<UNICODE_DISALLOW_SUPER> flags |
477 | affect the handling of code points that are above the Unicode maximum of | |
478 | 0x10FFFF. Languages other than Perl may not be able to accept files that | |
479 | contain these. | |
93e6dbd6 KW |
480 | |
481 | The flag C<UNICODE_WARN_ILLEGAL_INTERCHANGE> selects all three of | |
482 | the above WARN flags; and C<UNICODE_DISALLOW_ILLEGAL_INTERCHANGE> selects all | |
ecc1615f KW |
483 | three DISALLOW flags. C<UNICODE_DISALLOW_ILLEGAL_INTERCHANGE> restricts the |
484 | allowed inputs to the strict UTF-8 traditionally defined by Unicode. | |
485 | Similarly, C<UNICODE_WARN_ILLEGAL_C9_INTERCHANGE> and | |
486 | C<UNICODE_DISALLOW_ILLEGAL_C9_INTERCHANGE> are shortcuts to select the | |
487 | above-Unicode and surrogate flags, but not the non-character ones, as | |
488 | defined in | |
489 | L<Unicode Corrigendum #9|http://www.unicode.org/versions/corrigendum9.html>. | |
490 | See L<perlunicode/Noncharacter code points>. | |
93e6dbd6 | 491 | |
57ff5f59 KW |
492 | Extremely high code points were never specified in any standard, and require an |
493 | extension to UTF-8 to express, which Perl does. It is likely that programs | |
494 | written in something other than Perl would not be able to read files that | |
495 | contain these; nor would Perl understand files written by something that uses a | |
496 | different extension. For these reasons, there is a separate set of flags that | |
497 | can warn and/or disallow these extremely high code points, even if other | |
498 | above-Unicode ones are accepted. They are the C<UNICODE_WARN_PERL_EXTENDED> | |
499 | and C<UNICODE_DISALLOW_PERL_EXTENDED> flags. For more information see | |
500 | L</C<UTF8_GOT_PERL_EXTENDED>>. Of course C<UNICODE_DISALLOW_SUPER> will | |
501 | treat all above-Unicode code points, including these, as malformations. (Note | |
502 | that the Unicode standard considers anything above 0x10FFFF to be illegal, but | |
503 | there are standards predating it that allow up to 0x7FFF_FFFF (2**31 -1)) | |
504 | ||
505 | A somewhat misleadingly named synonym for C<UNICODE_WARN_PERL_EXTENDED> is | |
506 | retained for backward compatibility: C<UNICODE_WARN_ABOVE_31_BIT>. Similarly, | |
507 | C<UNICODE_DISALLOW_ABOVE_31_BIT> is usable instead of the more accurately named | |
7c4a22ed KW |
508 | C<UNICODE_DISALLOW_PERL_EXTENDED>. The names are misleading because on EBCDIC |
509 | platforms,these flags can apply to code points that actually do fit in 31 bits. | |
510 | The new names accurately describe the situation in all cases. | |
de69f3af | 511 | |
de69f3af KW |
512 | =cut |
513 | */ | |
514 | ||
515 | /* This is also a macro */ | |
516 | PERL_CALLCONV U8* Perl_uvchr_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags); | |
517 | ||
07693fe6 KW |
518 | U8 * |
519 | Perl_uvchr_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags) | |
520 | { | |
de69f3af | 521 | return uvchr_to_utf8_flags(d, uv, flags); |
07693fe6 KW |
522 | } |
523 | ||
57ff5f59 KW |
524 | #ifndef UV_IS_QUAD |
525 | ||
e050c007 KW |
526 | STATIC int |
527 | S_is_utf8_cp_above_31_bits(const U8 * const s, | |
528 | const U8 * const e, | |
529 | const bool consider_overlongs) | |
83dc0f42 KW |
530 | { |
531 | /* Returns TRUE if the first code point represented by the Perl-extended- | |
532 | * UTF-8-encoded string starting at 's', and looking no further than 'e - | |
533 | * 1' doesn't fit into 31 bytes. That is, that if it is >= 2**31. | |
534 | * | |
535 | * The function handles the case where the input bytes do not include all | |
536 | * the ones necessary to represent a full character. That is, they may be | |
537 | * the intial bytes of the representation of a code point, but possibly | |
538 | * the final ones necessary for the complete representation may be beyond | |
539 | * 'e - 1'. | |
540 | * | |
e050c007 KW |
541 | * The function also can handle the case where the input is an overlong |
542 | * sequence. If 'consider_overlongs' is 0, the function assumes the | |
543 | * input is not overlong, without checking, and will return based on that | |
544 | * assumption. If this parameter is 1, the function will go to the trouble | |
545 | * of figuring out if it actually evaluates to above or below 31 bits. | |
83dc0f42 | 546 | * |
e050c007 | 547 | * The sequence is otherwise assumed to be well-formed, without checking. |
83dc0f42 KW |
548 | */ |
549 | ||
e050c007 KW |
550 | const STRLEN len = e - s; |
551 | int is_overlong; | |
552 | ||
553 | PERL_ARGS_ASSERT_IS_UTF8_CP_ABOVE_31_BITS; | |
554 | ||
555 | assert(! UTF8_IS_INVARIANT(*s) && e > s); | |
556 | ||
83dc0f42 KW |
557 | #ifdef EBCDIC |
558 | ||
e050c007 | 559 | PERL_UNUSED_ARG(consider_overlongs); |
83dc0f42 | 560 | |
e050c007 KW |
561 | /* On the EBCDIC code pages we handle, only the native start byte 0xFE can |
562 | * mean a 32-bit or larger code point (0xFF is an invariant). 0xFE can | |
563 | * also be the start byte for a 31-bit code point; we need at least 2 | |
564 | * bytes, and maybe up through 8 bytes, to determine that. (It can also be | |
565 | * the start byte for an overlong sequence, but for 30-bit or smaller code | |
566 | * points, so we don't have to worry about overlongs on EBCDIC.) */ | |
567 | if (*s != 0xFE) { | |
568 | return 0; | |
569 | } | |
83dc0f42 | 570 | |
e050c007 KW |
571 | if (len == 1) { |
572 | return -1; | |
573 | } | |
83dc0f42 | 574 | |
e050c007 | 575 | #else |
83dc0f42 | 576 | |
e050c007 KW |
577 | /* On ASCII, FE and FF are the only start bytes that can evaluate to |
578 | * needing more than 31 bits. */ | |
579 | if (LIKELY(*s < 0xFE)) { | |
580 | return 0; | |
581 | } | |
83dc0f42 | 582 | |
e050c007 KW |
583 | /* What we have left are FE and FF. Both of these require more than 31 |
584 | * bits unless they are for overlongs. */ | |
585 | if (! consider_overlongs) { | |
586 | return 1; | |
587 | } | |
83dc0f42 | 588 | |
e050c007 KW |
589 | /* Here, we have FE or FF. If the input isn't overlong, it evaluates to |
590 | * above 31 bits. But we need more than one byte to discern this, so if | |
591 | * passed just the start byte, it could be an overlong evaluating to | |
592 | * smaller */ | |
593 | if (len == 1) { | |
594 | return -1; | |
595 | } | |
83dc0f42 | 596 | |
e050c007 KW |
597 | /* Having excluded len==1, and knowing that FE and FF are both valid start |
598 | * bytes, we can call the function below to see if the sequence is | |
599 | * overlong. (We don't need the full generality of the called function, | |
600 | * but for these huge code points, speed shouldn't be a consideration, and | |
601 | * the compiler does have enough information, since it's static to this | |
602 | * file, to optimize to just the needed parts.) */ | |
603 | is_overlong = is_utf8_overlong_given_start_byte_ok(s, len); | |
83dc0f42 | 604 | |
e050c007 KW |
605 | /* If it isn't overlong, more than 31 bits are required. */ |
606 | if (is_overlong == 0) { | |
607 | return 1; | |
608 | } | |
83dc0f42 | 609 | |
e050c007 KW |
610 | /* If it is indeterminate if it is overlong, return that */ |
611 | if (is_overlong < 0) { | |
612 | return -1; | |
613 | } | |
614 | ||
615 | /* Here is overlong. Such a sequence starting with FE is below 31 bits, as | |
616 | * the max it can be is 2**31 - 1 */ | |
617 | if (*s == 0xFE) { | |
618 | return 0; | |
83dc0f42 KW |
619 | } |
620 | ||
e050c007 KW |
621 | #endif |
622 | ||
623 | /* Here, ASCII and EBCDIC rejoin: | |
624 | * On ASCII: We have an overlong sequence starting with FF | |
625 | * On EBCDIC: We have a sequence starting with FE. */ | |
626 | ||
627 | { /* For C89, use a block so the declaration can be close to its use */ | |
628 | ||
629 | #ifdef EBCDIC | |
630 | ||
5f995336 KW |
631 | /* U+7FFFFFFF (2 ** 31 - 1) |
632 | * [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] 10 11 12 13 | |
633 | * IBM-1047: \xFE\x41\x41\x41\x41\x41\x41\x42\x73\x73\x73\x73\x73\x73 | |
634 | * IBM-037: \xFE\x41\x41\x41\x41\x41\x41\x42\x72\x72\x72\x72\x72\x72 | |
635 | * POSIX-BC: \xFE\x41\x41\x41\x41\x41\x41\x42\x75\x75\x75\x75\x75\x75 | |
636 | * I8: \xFF\xA0\xA0\xA0\xA0\xA0\xA0\xA1\xBF\xBF\xBF\xBF\xBF\xBF | |
637 | * U+80000000 (2 ** 31): | |
638 | * IBM-1047: \xFE\x41\x41\x41\x41\x41\x41\x43\x41\x41\x41\x41\x41\x41 | |
639 | * IBM-037: \xFE\x41\x41\x41\x41\x41\x41\x43\x41\x41\x41\x41\x41\x41 | |
640 | * POSIX-BC: \xFE\x41\x41\x41\x41\x41\x41\x43\x41\x41\x41\x41\x41\x41 | |
641 | * I8: \xFF\xA0\xA0\xA0\xA0\xA0\xA0\xA2\xA0\xA0\xA0\xA0\xA0\xA0 | |
e050c007 KW |
642 | * |
643 | * and since we know that *s = \xfe, any continuation sequcence | |
644 | * following it that is gt the below is above 31 bits | |
645 | [0] [1] [2] [3] [4] [5] [6] */ | |
646 | const U8 conts_for_highest_30_bit[] = "\x41\x41\x41\x41\x41\x41\x42"; | |
647 | ||
648 | #else | |
649 | ||
650 | /* FF overlong for U+7FFFFFFF (2 ** 31 - 1) | |
651 | * ASCII: \xFF\x80\x80\x80\x80\x80\x80\x81\xBF\xBF\xBF\xBF\xBF | |
652 | * FF overlong for U+80000000 (2 ** 31): | |
653 | * ASCII: \xFF\x80\x80\x80\x80\x80\x80\x82\x80\x80\x80\x80\x80 | |
654 | * and since we know that *s = \xff, any continuation sequcence | |
655 | * following it that is gt the below is above 30 bits | |
656 | [0] [1] [2] [3] [4] [5] [6] */ | |
657 | const U8 conts_for_highest_30_bit[] = "\x80\x80\x80\x80\x80\x80\x81"; | |
5f995336 | 658 | |
83dc0f42 KW |
659 | |
660 | #endif | |
e050c007 KW |
661 | const STRLEN conts_len = sizeof(conts_for_highest_30_bit) - 1; |
662 | const STRLEN cmp_len = MIN(conts_len, len - 1); | |
663 | ||
664 | /* Now compare the continuation bytes in s with the ones we have | |
665 | * compiled in that are for the largest 30 bit code point. If we have | |
666 | * enough bytes available to determine the answer, or the bytes we do | |
667 | * have differ from them, we can compare the two to get a definitive | |
668 | * answer (Note that in UTF-EBCDIC, the two lowest possible | |
669 | * continuation bytes are \x41 and \x42.) */ | |
670 | if (cmp_len >= conts_len || memNE(s + 1, | |
671 | conts_for_highest_30_bit, | |
672 | cmp_len)) | |
673 | { | |
674 | return cBOOL(memGT(s + 1, conts_for_highest_30_bit, cmp_len)); | |
675 | } | |
83dc0f42 | 676 | |
e050c007 KW |
677 | /* Here, all the bytes we have are the same as the highest 30-bit code |
678 | * point, but we are missing so many bytes that we can't make the | |
679 | * determination */ | |
680 | return -1; | |
681 | } | |
83dc0f42 KW |
682 | } |
683 | ||
57ff5f59 KW |
684 | #endif |
685 | ||
d6be65ae | 686 | PERL_STATIC_INLINE int |
12a4bed3 KW |
687 | S_is_utf8_overlong_given_start_byte_ok(const U8 * const s, const STRLEN len) |
688 | { | |
d6be65ae KW |
689 | /* Returns an int indicating whether or not the UTF-8 sequence from 's' to |
690 | * 's' + 'len' - 1 is an overlong. It returns 1 if it is an overlong; 0 if | |
691 | * it isn't, and -1 if there isn't enough information to tell. This last | |
692 | * return value can happen if the sequence is incomplete, missing some | |
693 | * trailing bytes that would form a complete character. If there are | |
694 | * enough bytes to make a definitive decision, this function does so. | |
695 | * Usually 2 bytes sufficient. | |
696 | * | |
697 | * Overlongs can occur whenever the number of continuation bytes changes. | |
698 | * That means whenever the number of leading 1 bits in a start byte | |
699 | * increases from the next lower start byte. That happens for start bytes | |
700 | * C0, E0, F0, F8, FC, FE, and FF. On modern perls, the following illegal | |
701 | * start bytes have already been excluded, so don't need to be tested here; | |
12a4bed3 KW |
702 | * ASCII platforms: C0, C1 |
703 | * EBCDIC platforms C0, C1, C2, C3, C4, E0 | |
d6be65ae | 704 | */ |
12a4bed3 KW |
705 | |
706 | const U8 s0 = NATIVE_UTF8_TO_I8(s[0]); | |
707 | const U8 s1 = NATIVE_UTF8_TO_I8(s[1]); | |
708 | ||
709 | PERL_ARGS_ASSERT_IS_UTF8_OVERLONG_GIVEN_START_BYTE_OK; | |
710 | assert(len > 1 && UTF8_IS_START(*s)); | |
711 | ||
712 | /* Each platform has overlongs after the start bytes given above (expressed | |
713 | * in I8 for EBCDIC). What constitutes an overlong varies by platform, but | |
714 | * the logic is the same, except the E0 overlong has already been excluded | |
715 | * on EBCDIC platforms. The values below were found by manually | |
716 | * inspecting the UTF-8 patterns. See the tables in utf8.h and | |
717 | * utfebcdic.h. */ | |
718 | ||
719 | # ifdef EBCDIC | |
720 | # define F0_ABOVE_OVERLONG 0xB0 | |
721 | # define F8_ABOVE_OVERLONG 0xA8 | |
722 | # define FC_ABOVE_OVERLONG 0xA4 | |
723 | # define FE_ABOVE_OVERLONG 0xA2 | |
724 | # define FF_OVERLONG_PREFIX "\xfe\x41\x41\x41\x41\x41\x41\x41" | |
725 | /* I8(0xfe) is FF */ | |
726 | # else | |
727 | ||
728 | if (s0 == 0xE0 && UNLIKELY(s1 < 0xA0)) { | |
d6be65ae | 729 | return 1; |
12a4bed3 KW |
730 | } |
731 | ||
732 | # define F0_ABOVE_OVERLONG 0x90 | |
733 | # define F8_ABOVE_OVERLONG 0x88 | |
734 | # define FC_ABOVE_OVERLONG 0x84 | |
735 | # define FE_ABOVE_OVERLONG 0x82 | |
736 | # define FF_OVERLONG_PREFIX "\xff\x80\x80\x80\x80\x80\x80" | |
737 | # endif | |
738 | ||
739 | ||
740 | if ( (s0 == 0xF0 && UNLIKELY(s1 < F0_ABOVE_OVERLONG)) | |
741 | || (s0 == 0xF8 && UNLIKELY(s1 < F8_ABOVE_OVERLONG)) | |
742 | || (s0 == 0xFC && UNLIKELY(s1 < FC_ABOVE_OVERLONG)) | |
743 | || (s0 == 0xFE && UNLIKELY(s1 < FE_ABOVE_OVERLONG))) | |
744 | { | |
d6be65ae | 745 | return 1; |
12a4bed3 KW |
746 | } |
747 | ||
b0b342d4 | 748 | /* Check for the FF overlong */ |
d6be65ae | 749 | return isFF_OVERLONG(s, len); |
b0b342d4 KW |
750 | } |
751 | ||
8d6204cc | 752 | PERL_STATIC_INLINE int |
b0b342d4 KW |
753 | S_isFF_OVERLONG(const U8 * const s, const STRLEN len) |
754 | { | |
8d6204cc KW |
755 | /* Returns an int indicating whether or not the UTF-8 sequence from 's' to |
756 | * 'e' - 1 is an overlong beginning with \xFF. It returns 1 if it is; 0 if | |
757 | * it isn't, and -1 if there isn't enough information to tell. This last | |
758 | * return value can happen if the sequence is incomplete, missing some | |
759 | * trailing bytes that would form a complete character. If there are | |
760 | * enough bytes to make a definitive decision, this function does so. */ | |
761 | ||
b0b342d4 | 762 | PERL_ARGS_ASSERT_ISFF_OVERLONG; |
12a4bed3 | 763 | |
8d6204cc KW |
764 | /* To be an FF overlong, all the available bytes must match */ |
765 | if (LIKELY(memNE(s, FF_OVERLONG_PREFIX, | |
766 | MIN(len, sizeof(FF_OVERLONG_PREFIX) - 1)))) | |
767 | { | |
768 | return 0; | |
769 | } | |
770 | ||
771 | /* To be an FF overlong sequence, all the bytes in FF_OVERLONG_PREFIX must | |
772 | * be there; what comes after them doesn't matter. See tables in utf8.h, | |
b0b342d4 | 773 | * utfebcdic.h. */ |
8d6204cc KW |
774 | if (len >= sizeof(FF_OVERLONG_PREFIX) - 1) { |
775 | return 1; | |
776 | } | |
12a4bed3 | 777 | |
8d6204cc KW |
778 | /* The missing bytes could cause the result to go one way or the other, so |
779 | * the result is indeterminate */ | |
780 | return -1; | |
12a4bed3 KW |
781 | } |
782 | ||
d22ec717 | 783 | #if defined(UV_IS_QUAD) /* These assume IV_MAX is 2**63-1 */ |
a77c906e KW |
784 | # ifdef EBCDIC /* Actually is I8 */ |
785 | # define HIGHEST_REPRESENTABLE_UTF8 \ | |
d22ec717 | 786 | "\xFF\xA7\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF" |
a77c906e KW |
787 | # else |
788 | # define HIGHEST_REPRESENTABLE_UTF8 \ | |
d22ec717 | 789 | "\xFF\x80\x87\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF" |
a77c906e KW |
790 | # endif |
791 | #endif | |
792 | ||
c285bbc4 | 793 | PERL_STATIC_INLINE int |
e050c007 KW |
794 | S_does_utf8_overflow(const U8 * const s, |
795 | const U8 * e, | |
796 | const bool consider_overlongs) | |
a77c906e | 797 | { |
c285bbc4 | 798 | /* Returns an int indicating whether or not the UTF-8 sequence from 's' to |
d22ec717 KW |
799 | * 'e' - 1 would overflow an IV on this platform; that is if it represents |
800 | * a code point larger than the highest representable code point. It | |
801 | * returns 1 if it does overflow; 0 if it doesn't, and -1 if there isn't | |
802 | * enough information to tell. This last return value can happen if the | |
803 | * sequence is incomplete, missing some trailing bytes that would form a | |
804 | * complete character. If there are enough bytes to make a definitive | |
805 | * decision, this function does so. | |
c285bbc4 | 806 | * |
e050c007 KW |
807 | * If 'consider_overlongs' is TRUE, the function checks for the possibility |
808 | * that the sequence is an overlong that doesn't overflow. Otherwise, it | |
809 | * assumes the sequence is not an overlong. This can give different | |
810 | * results only on ASCII 32-bit platforms. | |
811 | * | |
c285bbc4 KW |
812 | * (For ASCII platforms, we could use memcmp() because we don't have to |
813 | * convert each byte to I8, but it's very rare input indeed that would | |
814 | * approach overflow, so the loop below will likely only get executed once.) | |
815 | * | |
816 | * 'e' - 1 must not be beyond a full character. */ | |
a77c906e | 817 | |
a77c906e KW |
818 | |
819 | PERL_ARGS_ASSERT_DOES_UTF8_OVERFLOW; | |
820 | assert(s <= e && s + UTF8SKIP(s) >= e); | |
821 | ||
d22ec717 KW |
822 | #if ! defined(UV_IS_QUAD) |
823 | ||
824 | return is_utf8_cp_above_31_bits(s, e, consider_overlongs); | |
825 | ||
826 | #else | |
827 | ||
828 | PERL_UNUSED_ARG(consider_overlongs); | |
829 | ||
830 | { | |
831 | const STRLEN len = e - s; | |
832 | const U8 *x; | |
833 | const U8 * y = (const U8 *) HIGHEST_REPRESENTABLE_UTF8; | |
834 | ||
835 | for (x = s; x < e; x++, y++) { | |
836 | ||
837 | if (UNLIKELY(NATIVE_UTF8_TO_I8(*x) == *y)) { | |
838 | continue; | |
839 | } | |
840 | ||
841 | /* If this byte is larger than the corresponding highest UTF-8 | |
842 | * byte, the sequence overflow; otherwise the byte is less than, | |
843 | * and so the sequence doesn't overflow */ | |
844 | return NATIVE_UTF8_TO_I8(*x) > *y; | |
845 | ||
846 | } | |
847 | ||
848 | /* Got to the end and all bytes are the same. If the input is a whole | |
849 | * character, it doesn't overflow. And if it is a partial character, | |
850 | * there's not enough information to tell */ | |
851 | if (len < sizeof(HIGHEST_REPRESENTABLE_UTF8) - 1) { | |
852 | return -1; | |
853 | } | |
854 | ||
855 | return 0; | |
856 | } | |
857 | ||
858 | #endif | |
859 | ||
860 | } | |
861 | ||
862 | #if 0 | |
863 | ||
864 | /* This is the portions of the above function that deal with UV_MAX instead of | |
865 | * IV_MAX. They are left here in case we want to combine them so that internal | |
866 | * uses can have larger code points. The only logic difference is that the | |
867 | * 32-bit EBCDIC platform is treate like the 64-bit, and the 32-bit ASCII has | |
868 | * different logic. | |
869 | */ | |
870 | ||
871 | /* Anything larger than this will overflow the word if it were converted into a UV */ | |
872 | #if defined(UV_IS_QUAD) | |
873 | # ifdef EBCDIC /* Actually is I8 */ | |
874 | # define HIGHEST_REPRESENTABLE_UTF8 \ | |
875 | "\xFF\xAF\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF" | |
876 | # else | |
877 | # define HIGHEST_REPRESENTABLE_UTF8 \ | |
878 | "\xFF\x80\x8F\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF\xBF" | |
879 | # endif | |
880 | #else /* 32-bit */ | |
881 | # ifdef EBCDIC | |
882 | # define HIGHEST_REPRESENTABLE_UTF8 \ | |
883 | "\xFF\xA0\xA0\xA0\xA0\xA0\xA0\xA3\xBF\xBF\xBF\xBF\xBF\xBF" | |
884 | # else | |
885 | # define HIGHEST_REPRESENTABLE_UTF8 "\xFE\x83\xBF\xBF\xBF\xBF\xBF" | |
886 | # endif | |
887 | #endif | |
888 | ||
a77c906e KW |
889 | #if ! defined(UV_IS_QUAD) && ! defined(EBCDIC) |
890 | ||
891 | /* On 32 bit ASCII machines, many overlongs that start with FF don't | |
892 | * overflow */ | |
e050c007 | 893 | if (consider_overlongs && isFF_OVERLONG(s, len) > 0) { |
c285bbc4 KW |
894 | |
895 | /* To be such an overlong, the first bytes of 's' must match | |
896 | * FF_OVERLONG_PREFIX, which is "\xff\x80\x80\x80\x80\x80\x80". If we | |
897 | * don't have any additional bytes available, the sequence, when | |
898 | * completed might or might not fit in 32 bits. But if we have that | |
899 | * next byte, we can tell for sure. If it is <= 0x83, then it does | |
900 | * fit. */ | |
901 | if (len <= sizeof(FF_OVERLONG_PREFIX) - 1) { | |
902 | return -1; | |
903 | } | |
904 | ||
905 | return s[sizeof(FF_OVERLONG_PREFIX) - 1] > 0x83; | |
a77c906e KW |
906 | } |
907 | ||
d22ec717 KW |
908 | /* Starting with the #else, the rest of the function is identical except |
909 | * 1. we need to move the 'len' declaration to be global to the function | |
910 | * 2. the endif move to just after the UNUSED_ARG. | |
911 | * An empty endif is given just below to satisfy the preprocessor | |
912 | */ | |
a77c906e KW |
913 | #endif |
914 | ||
d22ec717 | 915 | #endif |
a77c906e | 916 | |
12a4bed3 KW |
917 | #undef F0_ABOVE_OVERLONG |
918 | #undef F8_ABOVE_OVERLONG | |
919 | #undef FC_ABOVE_OVERLONG | |
920 | #undef FE_ABOVE_OVERLONG | |
921 | #undef FF_OVERLONG_PREFIX | |
922 | ||
35f8c9bd | 923 | STRLEN |
edc2c47a | 924 | Perl__is_utf8_char_helper(const U8 * const s, const U8 * e, const U32 flags) |
35f8c9bd | 925 | { |
2b479609 | 926 | STRLEN len; |
12a4bed3 | 927 | const U8 *x; |
35f8c9bd | 928 | |
2b479609 KW |
929 | /* A helper function that should not be called directly. |
930 | * | |
931 | * This function returns non-zero if the string beginning at 's' and | |
932 | * looking no further than 'e - 1' is well-formed Perl-extended-UTF-8 for a | |
933 | * code point; otherwise it returns 0. The examination stops after the | |
934 | * first code point in 's' is validated, not looking at the rest of the | |
935 | * input. If 'e' is such that there are not enough bytes to represent a | |
936 | * complete code point, this function will return non-zero anyway, if the | |
937 | * bytes it does have are well-formed UTF-8 as far as they go, and aren't | |
938 | * excluded by 'flags'. | |
939 | * | |
940 | * A non-zero return gives the number of bytes required to represent the | |
941 | * code point. Be aware that if the input is for a partial character, the | |
942 | * return will be larger than 'e - s'. | |
943 | * | |
944 | * This function assumes that the code point represented is UTF-8 variant. | |
56576a04 KW |
945 | * The caller should have excluded the possibility of it being invariant |
946 | * before calling this function. | |
2b479609 KW |
947 | * |
948 | * 'flags' can be 0, or any combination of the UTF8_DISALLOW_foo flags | |
949 | * accepted by L</utf8n_to_uvchr>. If non-zero, this function will return | |
950 | * 0 if the code point represented is well-formed Perl-extended-UTF-8, but | |
951 | * disallowed by the flags. If the input is only for a partial character, | |
952 | * the function will return non-zero if there is any sequence of | |
953 | * well-formed UTF-8 that, when appended to the input sequence, could | |
954 | * result in an allowed code point; otherwise it returns 0. Non characters | |
955 | * cannot be determined based on partial character input. But many of the | |
956 | * other excluded types can be determined with just the first one or two | |
957 | * bytes. | |
958 | * | |
959 | */ | |
960 | ||
961 | PERL_ARGS_ASSERT__IS_UTF8_CHAR_HELPER; | |
962 | ||
963 | assert(0 == (flags & ~(UTF8_DISALLOW_ILLEGAL_INTERCHANGE | |
d044b7a7 | 964 | |UTF8_DISALLOW_PERL_EXTENDED))); |
2b479609 | 965 | assert(! UTF8_IS_INVARIANT(*s)); |
35f8c9bd | 966 | |
2b479609 | 967 | /* A variant char must begin with a start byte */ |
35f8c9bd KW |
968 | if (UNLIKELY(! UTF8_IS_START(*s))) { |
969 | return 0; | |
970 | } | |
971 | ||
edc2c47a KW |
972 | /* Examine a maximum of a single whole code point */ |
973 | if (e - s > UTF8SKIP(s)) { | |
974 | e = s + UTF8SKIP(s); | |
975 | } | |
976 | ||
2b479609 KW |
977 | len = e - s; |
978 | ||
979 | if (flags && isUTF8_POSSIBLY_PROBLEMATIC(*s)) { | |
980 | const U8 s0 = NATIVE_UTF8_TO_I8(s[0]); | |
35f8c9bd | 981 | |
56576a04 KW |
982 | /* Here, we are disallowing some set of largish code points, and the |
983 | * first byte indicates the sequence is for a code point that could be | |
984 | * in the excluded set. We generally don't have to look beyond this or | |
985 | * the second byte to see if the sequence is actually for one of the | |
986 | * excluded classes. The code below is derived from this table: | |
987 | * | |
2b479609 KW |
988 | * UTF-8 UTF-EBCDIC I8 |
989 | * U+D800: \xED\xA0\x80 \xF1\xB6\xA0\xA0 First surrogate | |
990 | * U+DFFF: \xED\xBF\xBF \xF1\xB7\xBF\xBF Final surrogate | |
991 | * U+110000: \xF4\x90\x80\x80 \xF9\xA2\xA0\xA0\xA0 First above Unicode | |
992 | * | |
56576a04 KW |
993 | * Keep in mind that legal continuation bytes range between \x80..\xBF |
994 | * for UTF-8, and \xA0..\xBF for I8. Anything above those aren't | |
995 | * continuation bytes. Hence, we don't have to test the upper edge | |
996 | * because if any of those is encountered, the sequence is malformed, | |
997 | * and would fail elsewhere in this function. | |
998 | * | |
999 | * The code here likewise assumes that there aren't other | |
1000 | * malformations; again the function should fail elsewhere because of | |
1001 | * these. For example, an overlong beginning with FC doesn't actually | |
1002 | * have to be a super; it could actually represent a small code point, | |
1003 | * even U+0000. But, since overlongs (and other malformations) are | |
1004 | * illegal, the function should return FALSE in either case. | |
2b479609 KW |
1005 | */ |
1006 | ||
1007 | #ifdef EBCDIC /* On EBCDIC, these are actually I8 bytes */ | |
1008 | # define FIRST_START_BYTE_THAT_IS_DEFINITELY_SUPER 0xFA | |
19794540 | 1009 | # define IS_UTF8_2_BYTE_SUPER(s0, s1) ((s0) == 0xF9 && (s1) >= 0xA2) |
2b479609 | 1010 | |
19794540 KW |
1011 | # define IS_UTF8_2_BYTE_SURROGATE(s0, s1) ((s0) == 0xF1 \ |
1012 | /* B6 and B7 */ \ | |
1013 | && ((s1) & 0xFE ) == 0xB6) | |
57ff5f59 | 1014 | # define isUTF8_PERL_EXTENDED(s) (*s == I8_TO_NATIVE_UTF8(0xFF)) |
2b479609 KW |
1015 | #else |
1016 | # define FIRST_START_BYTE_THAT_IS_DEFINITELY_SUPER 0xF5 | |
19794540 KW |
1017 | # define IS_UTF8_2_BYTE_SUPER(s0, s1) ((s0) == 0xF4 && (s1) >= 0x90) |
1018 | # define IS_UTF8_2_BYTE_SURROGATE(s0, s1) ((s0) == 0xED && (s1) >= 0xA0) | |
57ff5f59 | 1019 | # define isUTF8_PERL_EXTENDED(s) (*s >= 0xFE) |
2b479609 KW |
1020 | #endif |
1021 | ||
1022 | if ( (flags & UTF8_DISALLOW_SUPER) | |
ddb65933 KW |
1023 | && UNLIKELY(s0 >= FIRST_START_BYTE_THAT_IS_DEFINITELY_SUPER)) |
1024 | { | |
2b479609 KW |
1025 | return 0; /* Above Unicode */ |
1026 | } | |
1027 | ||
d044b7a7 | 1028 | if ( (flags & UTF8_DISALLOW_PERL_EXTENDED) |
57ff5f59 | 1029 | && UNLIKELY(isUTF8_PERL_EXTENDED(s))) |
2b479609 | 1030 | { |
57ff5f59 | 1031 | return 0; |
2b479609 KW |
1032 | } |
1033 | ||
1034 | if (len > 1) { | |
1035 | const U8 s1 = NATIVE_UTF8_TO_I8(s[1]); | |
1036 | ||
1037 | if ( (flags & UTF8_DISALLOW_SUPER) | |
19794540 | 1038 | && UNLIKELY(IS_UTF8_2_BYTE_SUPER(s0, s1))) |
2b479609 KW |
1039 | { |
1040 | return 0; /* Above Unicode */ | |
1041 | } | |
1042 | ||
1043 | if ( (flags & UTF8_DISALLOW_SURROGATE) | |
19794540 | 1044 | && UNLIKELY(IS_UTF8_2_BYTE_SURROGATE(s0, s1))) |
2b479609 KW |
1045 | { |
1046 | return 0; /* Surrogate */ | |
1047 | } | |
1048 | ||
1049 | if ( (flags & UTF8_DISALLOW_NONCHAR) | |
1050 | && UNLIKELY(UTF8_IS_NONCHAR(s, e))) | |
1051 | { | |
1052 | return 0; /* Noncharacter code point */ | |
1053 | } | |
1054 | } | |
1055 | } | |
1056 | ||
1057 | /* Make sure that all that follows are continuation bytes */ | |
35f8c9bd KW |
1058 | for (x = s + 1; x < e; x++) { |
1059 | if (UNLIKELY(! UTF8_IS_CONTINUATION(*x))) { | |
1060 | return 0; | |
1061 | } | |
1062 | } | |
1063 | ||
af13dd8a | 1064 | /* Here is syntactically valid. Next, make sure this isn't the start of an |
12a4bed3 | 1065 | * overlong. */ |
d6be65ae | 1066 | if (len > 1 && is_utf8_overlong_given_start_byte_ok(s, len) > 0) { |
12a4bed3 | 1067 | return 0; |
af13dd8a KW |
1068 | } |
1069 | ||
12a4bed3 KW |
1070 | /* And finally, that the code point represented fits in a word on this |
1071 | * platform */ | |
e050c007 KW |
1072 | if (0 < does_utf8_overflow(s, e, |
1073 | 0 /* Don't consider overlongs */ | |
1074 | )) | |
1075 | { | |
12a4bed3 | 1076 | return 0; |
35f8c9bd KW |
1077 | } |
1078 | ||
2b479609 | 1079 | return UTF8SKIP(s); |
35f8c9bd KW |
1080 | } |
1081 | ||
7e2f38b2 | 1082 | char * |
63ab03b3 | 1083 | Perl__byte_dump_string(pTHX_ const U8 * const start, const STRLEN len, const bool format) |
7cf8d05d KW |
1084 | { |
1085 | /* Returns a mortalized C string that is a displayable copy of the 'len' | |
63ab03b3 | 1086 | * bytes starting at 'start'. 'format' gives how to display each byte. |
7e2f38b2 KW |
1087 | * Currently, there are only two formats, so it is currently a bool: |
1088 | * 0 \xab | |
1089 | * 1 ab (that is a space between two hex digit bytes) | |
1090 | */ | |
7cf8d05d KW |
1091 | |
1092 | const STRLEN output_len = 4 * len + 1; /* 4 bytes per each input, plus a | |
1093 | trailing NUL */ | |
63ab03b3 KW |
1094 | const U8 * s = start; |
1095 | const U8 * const e = start + len; | |
7cf8d05d KW |
1096 | char * output; |
1097 | char * d; | |
1098 | ||
1099 | PERL_ARGS_ASSERT__BYTE_DUMP_STRING; | |
1100 | ||
1101 | Newx(output, output_len, char); | |
1102 | SAVEFREEPV(output); | |
1103 | ||
1104 | d = output; | |
63ab03b3 | 1105 | for (s = start; s < e; s++) { |
7cf8d05d KW |
1106 | const unsigned high_nibble = (*s & 0xF0) >> 4; |
1107 | const unsigned low_nibble = (*s & 0x0F); | |
1108 | ||
7e2f38b2 | 1109 | if (format) { |
63ab03b3 KW |
1110 | if (s > start) { |
1111 | *d++ = ' '; | |
1112 | } | |
7e2f38b2 KW |
1113 | } |
1114 | else { | |
1115 | *d++ = '\\'; | |
1116 | *d++ = 'x'; | |
1117 | } | |
7cf8d05d KW |
1118 | |
1119 | if (high_nibble < 10) { | |
1120 | *d++ = high_nibble + '0'; | |
1121 | } | |
1122 | else { | |
1123 | *d++ = high_nibble - 10 + 'a'; | |
1124 | } | |
1125 | ||
1126 | if (low_nibble < 10) { | |
1127 | *d++ = low_nibble + '0'; | |
1128 | } | |
1129 | else { | |
1130 | *d++ = low_nibble - 10 + 'a'; | |
1131 | } | |
1132 | } | |
1133 | ||
1134 | *d = '\0'; | |
1135 | return output; | |
1136 | } | |
1137 | ||
806547a7 | 1138 | PERL_STATIC_INLINE char * |
7cf8d05d KW |
1139 | S_unexpected_non_continuation_text(pTHX_ const U8 * const s, |
1140 | ||
421da25c | 1141 | /* Max number of bytes to print */ |
3cc6a05e | 1142 | STRLEN print_len, |
7cf8d05d KW |
1143 | |
1144 | /* Which one is the non-continuation */ | |
1145 | const STRLEN non_cont_byte_pos, | |
1146 | ||
1147 | /* How many bytes should there be? */ | |
1148 | const STRLEN expect_len) | |
806547a7 KW |
1149 | { |
1150 | /* Return the malformation warning text for an unexpected continuation | |
1151 | * byte. */ | |
1152 | ||
7cf8d05d | 1153 | const char * const where = (non_cont_byte_pos == 1) |
806547a7 | 1154 | ? "immediately" |
7cf8d05d KW |
1155 | : Perl_form(aTHX_ "%d bytes", |
1156 | (int) non_cont_byte_pos); | |
421da25c KW |
1157 | const U8 * x = s + non_cont_byte_pos; |
1158 | const U8 * e = s + print_len; | |
806547a7 KW |
1159 | |
1160 | PERL_ARGS_ASSERT_UNEXPECTED_NON_CONTINUATION_TEXT; | |
1161 | ||
7cf8d05d KW |
1162 | /* We don't need to pass this parameter, but since it has already been |
1163 | * calculated, it's likely faster to pass it; verify under DEBUGGING */ | |
1164 | assert(expect_len == UTF8SKIP(s)); | |
1165 | ||
421da25c KW |
1166 | /* As a defensive coding measure, don't output anything past a NUL. Such |
1167 | * bytes shouldn't be in the middle of a malformation, and could mark the | |
1168 | * end of the allocated string, and what comes after is undefined */ | |
1169 | for (; x < e; x++) { | |
1170 | if (*x == '\0') { | |
1171 | x++; /* Output this particular NUL */ | |
1172 | break; | |
1173 | } | |
1174 | } | |
1175 | ||
7cf8d05d KW |
1176 | return Perl_form(aTHX_ "%s: %s (unexpected non-continuation byte 0x%02x," |
1177 | " %s after start byte 0x%02x; need %d bytes, got %d)", | |
1178 | malformed_text, | |
421da25c | 1179 | _byte_dump_string(s, x - s, 0), |
7cf8d05d KW |
1180 | *(s + non_cont_byte_pos), |
1181 | where, | |
1182 | *s, | |
1183 | (int) expect_len, | |
1184 | (int) non_cont_byte_pos); | |
806547a7 KW |
1185 | } |
1186 | ||
35f8c9bd KW |
1187 | /* |
1188 | ||
de69f3af | 1189 | =for apidoc utf8n_to_uvchr |
378516de KW |
1190 | |
1191 | THIS FUNCTION SHOULD BE USED IN ONLY VERY SPECIALIZED CIRCUMSTANCES. | |
de69f3af | 1192 | Most code should use L</utf8_to_uvchr_buf>() rather than call this directly. |
67e989fb | 1193 | |
9041c2e3 | 1194 | Bottom level UTF-8 decode routine. |
de69f3af | 1195 | Returns the native code point value of the first character in the string C<s>, |
746afd53 KW |
1196 | which is assumed to be in UTF-8 (or UTF-EBCDIC) encoding, and no longer than |
1197 | C<curlen> bytes; C<*retlen> (if C<retlen> isn't NULL) will be set to | |
1198 | the length, in bytes, of that character. | |
949cf498 KW |
1199 | |
1200 | The value of C<flags> determines the behavior when C<s> does not point to a | |
2b5e7bc2 KW |
1201 | well-formed UTF-8 character. If C<flags> is 0, encountering a malformation |
1202 | causes zero to be returned and C<*retlen> is set so that (S<C<s> + C<*retlen>>) | |
1203 | is the next possible position in C<s> that could begin a non-malformed | |
1204 | character. Also, if UTF-8 warnings haven't been lexically disabled, a warning | |
1205 | is raised. Some UTF-8 input sequences may contain multiple malformations. | |
1206 | This function tries to find every possible one in each call, so multiple | |
56576a04 | 1207 | warnings can be raised for the same sequence. |
949cf498 KW |
1208 | |
1209 | Various ALLOW flags can be set in C<flags> to allow (and not warn on) | |
1210 | individual types of malformations, such as the sequence being overlong (that | |
1211 | is, when there is a shorter sequence that can express the same code point; | |
1212 | overlong sequences are expressly forbidden in the UTF-8 standard due to | |
1213 | potential security issues). Another malformation example is the first byte of | |
1214 | a character not being a legal first byte. See F<utf8.h> for the list of such | |
94953955 KW |
1215 | flags. Even if allowed, this function generally returns the Unicode |
1216 | REPLACEMENT CHARACTER when it encounters a malformation. There are flags in | |
1217 | F<utf8.h> to override this behavior for the overlong malformations, but don't | |
1218 | do that except for very specialized purposes. | |
949cf498 | 1219 | |
796b6530 | 1220 | The C<UTF8_CHECK_ONLY> flag overrides the behavior when a non-allowed (by other |
949cf498 KW |
1221 | flags) malformation is found. If this flag is set, the routine assumes that |
1222 | the caller will raise a warning, and this function will silently just set | |
d088425d KW |
1223 | C<retlen> to C<-1> (cast to C<STRLEN>) and return zero. |
1224 | ||
75200dff | 1225 | Note that this API requires disambiguation between successful decoding a C<NUL> |
796b6530 | 1226 | character, and an error return (unless the C<UTF8_CHECK_ONLY> flag is set), as |
111fa700 KW |
1227 | in both cases, 0 is returned, and, depending on the malformation, C<retlen> may |
1228 | be set to 1. To disambiguate, upon a zero return, see if the first byte of | |
1229 | C<s> is 0 as well. If so, the input was a C<NUL>; if not, the input had an | |
f9380377 | 1230 | error. Or you can use C<L</utf8n_to_uvchr_error>>. |
949cf498 KW |
1231 | |
1232 | Certain code points are considered problematic. These are Unicode surrogates, | |
746afd53 | 1233 | Unicode non-characters, and code points above the Unicode maximum of 0x10FFFF. |
949cf498 | 1234 | By default these are considered regular code points, but certain situations |
ecc1615f KW |
1235 | warrant special handling for them, which can be specified using the C<flags> |
1236 | parameter. If C<flags> contains C<UTF8_DISALLOW_ILLEGAL_INTERCHANGE>, all | |
1237 | three classes are treated as malformations and handled as such. The flags | |
1238 | C<UTF8_DISALLOW_SURROGATE>, C<UTF8_DISALLOW_NONCHAR>, and | |
1239 | C<UTF8_DISALLOW_SUPER> (meaning above the legal Unicode maximum) can be set to | |
1240 | disallow these categories individually. C<UTF8_DISALLOW_ILLEGAL_INTERCHANGE> | |
1241 | restricts the allowed inputs to the strict UTF-8 traditionally defined by | |
1242 | Unicode. Use C<UTF8_DISALLOW_ILLEGAL_C9_INTERCHANGE> to use the strictness | |
1243 | definition given by | |
1244 | L<Unicode Corrigendum #9|http://www.unicode.org/versions/corrigendum9.html>. | |
1245 | The difference between traditional strictness and C9 strictness is that the | |
1246 | latter does not forbid non-character code points. (They are still discouraged, | |
1247 | however.) For more discussion see L<perlunicode/Noncharacter code points>. | |
1248 | ||
1249 | The flags C<UTF8_WARN_ILLEGAL_INTERCHANGE>, | |
1250 | C<UTF8_WARN_ILLEGAL_C9_INTERCHANGE>, C<UTF8_WARN_SURROGATE>, | |
796b6530 KW |
1251 | C<UTF8_WARN_NONCHAR>, and C<UTF8_WARN_SUPER> will cause warning messages to be |
1252 | raised for their respective categories, but otherwise the code points are | |
1253 | considered valid (not malformations). To get a category to both be treated as | |
1254 | a malformation and raise a warning, specify both the WARN and DISALLOW flags. | |
949cf498 | 1255 | (But note that warnings are not raised if lexically disabled nor if |
796b6530 | 1256 | C<UTF8_CHECK_ONLY> is also specified.) |
949cf498 | 1257 | |
57ff5f59 KW |
1258 | Extremely high code points were never specified in any standard, and require an |
1259 | extension to UTF-8 to express, which Perl does. It is likely that programs | |
1260 | written in something other than Perl would not be able to read files that | |
1261 | contain these; nor would Perl understand files written by something that uses a | |
1262 | different extension. For these reasons, there is a separate set of flags that | |
1263 | can warn and/or disallow these extremely high code points, even if other | |
1264 | above-Unicode ones are accepted. They are the C<UTF8_WARN_PERL_EXTENDED> and | |
1265 | C<UTF8_DISALLOW_PERL_EXTENDED> flags. For more information see | |
1266 | L</C<UTF8_GOT_PERL_EXTENDED>>. Of course C<UTF8_DISALLOW_SUPER> will treat all | |
1267 | above-Unicode code points, including these, as malformations. | |
1268 | (Note that the Unicode standard considers anything above 0x10FFFF to be | |
1269 | illegal, but there are standards predating it that allow up to 0x7FFF_FFFF | |
1270 | (2**31 -1)) | |
1271 | ||
1272 | A somewhat misleadingly named synonym for C<UTF8_WARN_PERL_EXTENDED> is | |
1273 | retained for backward compatibility: C<UTF8_WARN_ABOVE_31_BIT>. Similarly, | |
1274 | C<UTF8_DISALLOW_ABOVE_31_BIT> is usable instead of the more accurately named | |
1275 | C<UTF8_DISALLOW_PERL_EXTENDED>. The names are misleading because these flags | |
1276 | can apply to code points that actually do fit in 31 bits. This happens on | |
1277 | EBCDIC platforms, and sometimes when the L<overlong | |
1278 | malformation|/C<UTF8_GOT_LONG>> is also present. The new names accurately | |
1279 | describe the situation in all cases. | |
1280 | ||
ab8e6d41 | 1281 | |
949cf498 KW |
1282 | All other code points corresponding to Unicode characters, including private |
1283 | use and those yet to be assigned, are never considered malformed and never | |
1284 | warn. | |
67e989fb | 1285 | |
37607a96 | 1286 | =cut |
f9380377 KW |
1287 | |
1288 | Also implemented as a macro in utf8.h | |
1289 | */ | |
1290 | ||
1291 | UV | |
e6a4ffc3 KW |
1292 | Perl_utf8n_to_uvchr(const U8 *s, |
1293 | STRLEN curlen, | |
1294 | STRLEN *retlen, | |
1295 | const U32 flags) | |
f9380377 KW |
1296 | { |
1297 | PERL_ARGS_ASSERT_UTF8N_TO_UVCHR; | |
1298 | ||
1299 | return utf8n_to_uvchr_error(s, curlen, retlen, flags, NULL); | |
1300 | } | |
1301 | ||
1302 | /* | |
1303 | ||
1304 | =for apidoc utf8n_to_uvchr_error | |
1305 | ||
1306 | THIS FUNCTION SHOULD BE USED IN ONLY VERY SPECIALIZED CIRCUMSTANCES. | |
1307 | Most code should use L</utf8_to_uvchr_buf>() rather than call this directly. | |
1308 | ||
1309 | This function is for code that needs to know what the precise malformation(s) | |
37657a5b KW |
1310 | are when an error is found. If you also need to know the generated warning |
1311 | messages, use L</utf8n_to_uvchr_msgs>() instead. | |
f9380377 KW |
1312 | |
1313 | It is like C<L</utf8n_to_uvchr>> but it takes an extra parameter placed after | |
1314 | all the others, C<errors>. If this parameter is 0, this function behaves | |
1315 | identically to C<L</utf8n_to_uvchr>>. Otherwise, C<errors> should be a pointer | |
1316 | to a C<U32> variable, which this function sets to indicate any errors found. | |
1317 | Upon return, if C<*errors> is 0, there were no errors found. Otherwise, | |
1318 | C<*errors> is the bit-wise C<OR> of the bits described in the list below. Some | |
1319 | of these bits will be set if a malformation is found, even if the input | |
7a65503b | 1320 | C<flags> parameter indicates that the given malformation is allowed; those |
f9380377 KW |
1321 | exceptions are noted: |
1322 | ||
1323 | =over 4 | |
1324 | ||
57ff5f59 | 1325 | =item C<UTF8_GOT_PERL_EXTENDED> |
f9380377 | 1326 | |
57ff5f59 KW |
1327 | The input sequence is not standard UTF-8, but a Perl extension. This bit is |
1328 | set only if the input C<flags> parameter contains either the | |
1329 | C<UTF8_DISALLOW_PERL_EXTENDED> or the C<UTF8_WARN_PERL_EXTENDED> flags. | |
1330 | ||
1331 | Code points above 0x7FFF_FFFF (2**31 - 1) were never specified in any standard, | |
1332 | and so some extension must be used to express them. Perl uses a natural | |
1333 | extension to UTF-8 to represent the ones up to 2**36-1, and invented a further | |
1334 | extension to represent even higher ones, so that any code point that fits in a | |
1335 | 64-bit word can be represented. Text using these extensions is not likely to | |
1336 | be portable to non-Perl code. We lump both of these extensions together and | |
1337 | refer to them as Perl extended UTF-8. There exist other extensions that people | |
1338 | have invented, incompatible with Perl's. | |
1339 | ||
1340 | On EBCDIC platforms starting in Perl v5.24, the Perl extension for representing | |
1341 | extremely high code points kicks in at 0x3FFF_FFFF (2**30 -1), which is lower | |
1342 | than on ASCII. Prior to that, code points 2**31 and higher were simply | |
1343 | unrepresentable, and a different, incompatible method was used to represent | |
1344 | code points between 2**30 and 2**31 - 1. | |
1345 | ||
1346 | On both platforms, ASCII and EBCDIC, C<UTF8_GOT_PERL_EXTENDED> is set if | |
1347 | Perl extended UTF-8 is used. | |
1348 | ||
1349 | In earlier Perls, this bit was named C<UTF8_GOT_ABOVE_31_BIT>, which you still | |
1350 | may use for backward compatibility. That name is misleading, as this flag may | |
1351 | be set when the code point actually does fit in 31 bits. This happens on | |
1352 | EBCDIC platforms, and sometimes when the L<overlong | |
1353 | malformation|/C<UTF8_GOT_LONG>> is also present. The new name accurately | |
1354 | describes the situation in all cases. | |
f9380377 KW |
1355 | |
1356 | =item C<UTF8_GOT_CONTINUATION> | |
1357 | ||
1358 | The input sequence was malformed in that the first byte was a a UTF-8 | |
1359 | continuation byte. | |
1360 | ||
1361 | =item C<UTF8_GOT_EMPTY> | |
1362 | ||
1363 | The input C<curlen> parameter was 0. | |
1364 | ||
1365 | =item C<UTF8_GOT_LONG> | |
1366 | ||
1367 | The input sequence was malformed in that there is some other sequence that | |
1368 | evaluates to the same code point, but that sequence is shorter than this one. | |
1369 | ||
fecaf136 KW |
1370 | Until Unicode 3.1, it was legal for programs to accept this malformation, but |
1371 | it was discovered that this created security issues. | |
1372 | ||
f9380377 KW |
1373 | =item C<UTF8_GOT_NONCHAR> |
1374 | ||
1375 | The code point represented by the input UTF-8 sequence is for a Unicode | |
1376 | non-character code point. | |
1377 | This bit is set only if the input C<flags> parameter contains either the | |
1378 | C<UTF8_DISALLOW_NONCHAR> or the C<UTF8_WARN_NONCHAR> flags. | |
1379 | ||
1380 | =item C<UTF8_GOT_NON_CONTINUATION> | |
1381 | ||
1382 | The input sequence was malformed in that a non-continuation type byte was found | |
00d976bb KW |
1383 | in a position where only a continuation type one should be. See also |
1384 | L</C<UTF8_GOT_SHORT>>. | |
f9380377 KW |
1385 | |
1386 | =item C<UTF8_GOT_OVERFLOW> | |
1387 | ||
1388 | The input sequence was malformed in that it is for a code point that is not | |
d22ec717 | 1389 | representable in the number of bits available in an IV on the current platform. |
f9380377 KW |
1390 | |
1391 | =item C<UTF8_GOT_SHORT> | |
1392 | ||
1393 | The input sequence was malformed in that C<curlen> is smaller than required for | |
1394 | a complete sequence. In other words, the input is for a partial character | |
1395 | sequence. | |
1396 | ||
00d976bb KW |
1397 | |
1398 | C<UTF8_GOT_SHORT> and C<UTF8_GOT_NON_CONTINUATION> both indicate a too short | |
1399 | sequence. The difference is that C<UTF8_GOT_NON_CONTINUATION> indicates always | |
1400 | that there is an error, while C<UTF8_GOT_SHORT> means that an incomplete | |
1401 | sequence was looked at. If no other flags are present, it means that the | |
1402 | sequence was valid as far as it went. Depending on the application, this could | |
1403 | mean one of three things: | |
1404 | ||
1405 | =over | |
1406 | ||
1407 | =item * | |
1408 | ||
1409 | The C<curlen> length parameter passed in was too small, and the function was | |
1410 | prevented from examining all the necessary bytes. | |
1411 | ||
1412 | =item * | |
1413 | ||
1414 | The buffer being looked at is based on reading data, and the data received so | |
1415 | far stopped in the middle of a character, so that the next read will | |
1416 | read the remainder of this character. (It is up to the caller to deal with the | |
1417 | split bytes somehow.) | |
1418 | ||
1419 | =item * | |
1420 | ||
1421 | This is a real error, and the partial sequence is all we're going to get. | |
1422 | ||
1423 | =back | |
1424 | ||
f9380377 KW |
1425 | =item C<UTF8_GOT_SUPER> |
1426 | ||
1427 | The input sequence was malformed in that it is for a non-Unicode code point; | |
1428 | that is, one above the legal Unicode maximum. | |
1429 | This bit is set only if the input C<flags> parameter contains either the | |
1430 | C<UTF8_DISALLOW_SUPER> or the C<UTF8_WARN_SUPER> flags. | |
1431 | ||
1432 | =item C<UTF8_GOT_SURROGATE> | |
1433 | ||
1434 | The input sequence was malformed in that it is for a -Unicode UTF-16 surrogate | |
1435 | code point. | |
1436 | This bit is set only if the input C<flags> parameter contains either the | |
1437 | C<UTF8_DISALLOW_SURROGATE> or the C<UTF8_WARN_SURROGATE> flags. | |
1438 | ||
1439 | =back | |
1440 | ||
133551d8 KW |
1441 | To do your own error handling, call this function with the C<UTF8_CHECK_ONLY> |
1442 | flag to suppress any warnings, and then examine the C<*errors> return. | |
1443 | ||
f9380377 | 1444 | =cut |
37657a5b KW |
1445 | |
1446 | Also implemented as a macro in utf8.h | |
37607a96 | 1447 | */ |
67e989fb | 1448 | |
a0ed51b3 | 1449 | UV |
e6a4ffc3 | 1450 | Perl_utf8n_to_uvchr_error(const U8 *s, |
37657a5b KW |
1451 | STRLEN curlen, |
1452 | STRLEN *retlen, | |
1453 | const U32 flags, | |
1454 | U32 * errors) | |
1455 | { | |
1456 | PERL_ARGS_ASSERT_UTF8N_TO_UVCHR_ERROR; | |
1457 | ||
1458 | return utf8n_to_uvchr_msgs(s, curlen, retlen, flags, errors, NULL); | |
1459 | } | |
1460 | ||
1461 | /* | |
1462 | ||
1463 | =for apidoc utf8n_to_uvchr_msgs | |
1464 | ||
1465 | THIS FUNCTION SHOULD BE USED IN ONLY VERY SPECIALIZED CIRCUMSTANCES. | |
1466 | Most code should use L</utf8_to_uvchr_buf>() rather than call this directly. | |
1467 | ||
1468 | This function is for code that needs to know what the precise malformation(s) | |
1469 | are when an error is found, and wants the corresponding warning and/or error | |
1470 | messages to be returned to the caller rather than be displayed. All messages | |
1471 | that would have been displayed if all lexcial warnings are enabled will be | |
1472 | returned. | |
1473 | ||
1474 | It is just like C<L</utf8n_to_uvchr_error>> but it takes an extra parameter | |
1475 | placed after all the others, C<msgs>. If this parameter is 0, this function | |
1476 | behaves identically to C<L</utf8n_to_uvchr_error>>. Otherwise, C<msgs> should | |
1477 | be a pointer to an C<AV *> variable, in which this function creates a new AV to | |
1478 | contain any appropriate messages. The elements of the array are ordered so | |
1479 | that the first message that would have been displayed is in the 0th element, | |
1480 | and so on. Each element is a hash with three key-value pairs, as follows: | |
1481 | ||
1482 | =over 4 | |
1483 | ||
1484 | =item C<text> | |
1485 | ||
1486 | The text of the message as a C<SVpv>. | |
1487 | ||
1488 | =item C<warn_categories> | |
1489 | ||
1490 | The warning category (or categories) packed into a C<SVuv>. | |
1491 | ||
1492 | =item C<flag> | |
1493 | ||
1494 | A single flag bit associated with this message, in a C<SVuv>. | |
1495 | The bit corresponds to some bit in the C<*errors> return value, | |
1496 | such as C<UTF8_GOT_LONG>. | |
1497 | ||
1498 | =back | |
1499 | ||
1500 | It's important to note that specifying this parameter as non-null will cause | |
1501 | any warnings this function would otherwise generate to be suppressed, and | |
1502 | instead be placed in C<*msgs>. The caller can check the lexical warnings state | |
1503 | (or not) when choosing what to do with the returned messages. | |
1504 | ||
1505 | If the flag C<UTF8_CHECK_ONLY> is passed, no warnings are generated, and hence | |
1506 | no AV is created. | |
1507 | ||
1508 | The caller, of course, is responsible for freeing any returned AV. | |
1509 | ||
1510 | =cut | |
1511 | */ | |
1512 | ||
1513 | UV | |
e6a4ffc3 | 1514 | Perl__utf8n_to_uvchr_msgs_helper(const U8 *s, |
37657a5b KW |
1515 | STRLEN curlen, |
1516 | STRLEN *retlen, | |
1517 | const U32 flags, | |
1518 | U32 * errors, | |
1519 | AV ** msgs) | |
a0ed51b3 | 1520 | { |
d4c19fe8 | 1521 | const U8 * const s0 = s; |
2b9519f0 | 1522 | const U8 * send = s0 + curlen; |
5af9f822 KW |
1523 | U32 possible_problems; /* A bit is set here for each potential problem |
1524 | found as we go along */ | |
1525 | UV uv; | |
1526 | STRLEN expectlen; /* How long should this sequence be? */ | |
1527 | STRLEN avail_len; /* When input is too short, gives what that is */ | |
1528 | U32 discard_errors; /* Used to save branches when 'errors' is NULL; this | |
1529 | gets set and discarded */ | |
a0dbb045 | 1530 | |
2b5e7bc2 KW |
1531 | /* The below are used only if there is both an overlong malformation and a |
1532 | * too short one. Otherwise the first two are set to 's0' and 'send', and | |
1533 | * the third not used at all */ | |
5af9f822 | 1534 | U8 * adjusted_s0; |
e9f2c446 KW |
1535 | U8 temp_char_buf[UTF8_MAXBYTES + 1]; /* Used to avoid a Newx in this |
1536 | routine; see [perl #130921] */ | |
5af9f822 | 1537 | UV uv_so_far; |
e6a4ffc3 | 1538 | dTHX; |
5af9f822 | 1539 | |
e6a4ffc3 | 1540 | PERL_ARGS_ASSERT__UTF8N_TO_UVCHR_MSGS_HELPER; |
5af9f822 KW |
1541 | |
1542 | /* Here, is one of: a) malformed; b) a problematic code point (surrogate, | |
1543 | * non-unicode, or nonchar); or c) on ASCII platforms, one of the Hangul | |
1544 | * syllables that the dfa doesn't properly handle. Quickly dispose of the | |
1545 | * final case. */ | |
1546 | ||
1547 | #ifndef EBCDIC | |
1548 | ||
1549 | /* Each of the affected Hanguls starts with \xED */ | |
1550 | ||
1551 | if (is_HANGUL_ED_utf8_safe(s0, send)) { | |
1552 | if (retlen) { | |
1553 | *retlen = 3; | |
1554 | } | |
1555 | if (errors) { | |
1556 | *errors = 0; | |
1557 | } | |
1558 | if (msgs) { | |
1559 | *msgs = NULL; | |
1560 | } | |
1561 | ||
1562 | return ((0xED & UTF_START_MASK(3)) << (2 * UTF_ACCUMULATION_SHIFT)) | |
1563 | | ((s0[1] & UTF_CONTINUATION_MASK) << UTF_ACCUMULATION_SHIFT) | |
1564 | | (s0[2] & UTF_CONTINUATION_MASK); | |
1565 | } | |
1566 | ||
1567 | #endif | |
1568 | ||
1569 | /* In conjunction with the exhaustive tests that can be enabled in | |
1570 | * APItest/t/utf8_warn_base.pl, this can make sure the dfa does precisely | |
1571 | * what it is intended to do, and that no flaws in it are masked by | |
1572 | * dropping down and executing the code below | |
1573 | assert(! isUTF8_CHAR(s0, send) | |
1574 | || UTF8_IS_SURROGATE(s0, send) | |
1575 | || UTF8_IS_SUPER(s0, send) | |
1576 | || UTF8_IS_NONCHAR(s0,send)); | |
1577 | */ | |
1578 | ||
1579 | s = s0; | |
1580 | uv = *s0; | |
1581 | possible_problems = 0; | |
1582 | expectlen = 0; | |
1583 | avail_len = 0; | |
1584 | discard_errors = 0; | |
1585 | adjusted_s0 = (U8 *) s0; | |
1586 | uv_so_far = 0; | |
1587 | ||
f9380377 KW |
1588 | if (errors) { |
1589 | *errors = 0; | |
1590 | } | |
1591 | else { | |
1592 | errors = &discard_errors; | |
1593 | } | |
a0dbb045 | 1594 | |
eb83ed87 KW |
1595 | /* The order of malformation tests here is important. We should consume as |
1596 | * few bytes as possible in order to not skip any valid character. This is | |
1597 | * required by the Unicode Standard (section 3.9 of Unicode 6.0); see also | |
1598 | * http://unicode.org/reports/tr36 for more discussion as to why. For | |
1599 | * example, once we've done a UTF8SKIP, we can tell the expected number of | |
1600 | * bytes, and could fail right off the bat if the input parameters indicate | |
1601 | * that there are too few available. But it could be that just that first | |
1602 | * byte is garbled, and the intended character occupies fewer bytes. If we | |
1603 | * blindly assumed that the first byte is correct, and skipped based on | |
1604 | * that number, we could skip over a valid input character. So instead, we | |
1605 | * always examine the sequence byte-by-byte. | |
1606 | * | |
1607 | * We also should not consume too few bytes, otherwise someone could inject | |
1608 | * things. For example, an input could be deliberately designed to | |
1609 | * overflow, and if this code bailed out immediately upon discovering that, | |
e2660c54 | 1610 | * returning to the caller C<*retlen> pointing to the very next byte (one |
eb83ed87 KW |
1611 | * which is actually part of of the overflowing sequence), that could look |
1612 | * legitimate to the caller, which could discard the initial partial | |
2b5e7bc2 KW |
1613 | * sequence and process the rest, inappropriately. |
1614 | * | |
1615 | * Some possible input sequences are malformed in more than one way. This | |
1616 | * function goes to lengths to try to find all of them. This is necessary | |
1617 | * for correctness, as the inputs may allow one malformation but not | |
1618 | * another, and if we abandon searching for others after finding the | |
1619 | * allowed one, we could allow in something that shouldn't have been. | |
1620 | */ | |
eb83ed87 | 1621 | |
b5b9af04 | 1622 | if (UNLIKELY(curlen == 0)) { |
2b5e7bc2 KW |
1623 | possible_problems |= UTF8_GOT_EMPTY; |
1624 | curlen = 0; | |
5a48568d | 1625 | uv = UNICODE_REPLACEMENT; |
2b5e7bc2 | 1626 | goto ready_to_handle_errors; |
0c443dc2 JH |
1627 | } |
1628 | ||
eb83ed87 KW |
1629 | expectlen = UTF8SKIP(s); |
1630 | ||
1631 | /* A well-formed UTF-8 character, as the vast majority of calls to this | |
1632 | * function will be for, has this expected length. For efficiency, set | |
1633 | * things up here to return it. It will be overriden only in those rare | |
1634 | * cases where a malformation is found */ | |
1635 | if (retlen) { | |
1636 | *retlen = expectlen; | |
1637 | } | |
1638 | ||
eb83ed87 | 1639 | /* A continuation character can't start a valid sequence */ |
b5b9af04 | 1640 | if (UNLIKELY(UTF8_IS_CONTINUATION(uv))) { |
2b5e7bc2 KW |
1641 | possible_problems |= UTF8_GOT_CONTINUATION; |
1642 | curlen = 1; | |
1643 | uv = UNICODE_REPLACEMENT; | |
1644 | goto ready_to_handle_errors; | |
ba210ebe | 1645 | } |
9041c2e3 | 1646 | |
dcd27b3c | 1647 | /* Here is not a continuation byte, nor an invariant. The only thing left |
ddb65933 KW |
1648 | * is a start byte (possibly for an overlong). (We can't use UTF8_IS_START |
1649 | * because it excludes start bytes like \xC0 that always lead to | |
1650 | * overlongs.) */ | |
dcd27b3c | 1651 | |
534752c1 KW |
1652 | /* Convert to I8 on EBCDIC (no-op on ASCII), then remove the leading bits |
1653 | * that indicate the number of bytes in the character's whole UTF-8 | |
1654 | * sequence, leaving just the bits that are part of the value. */ | |
1655 | uv = NATIVE_UTF8_TO_I8(uv) & UTF_START_MASK(expectlen); | |
ba210ebe | 1656 | |
e308b348 KW |
1657 | /* Setup the loop end point, making sure to not look past the end of the |
1658 | * input string, and flag it as too short if the size isn't big enough. */ | |
e308b348 KW |
1659 | if (UNLIKELY(curlen < expectlen)) { |
1660 | possible_problems |= UTF8_GOT_SHORT; | |
1661 | avail_len = curlen; | |
e308b348 KW |
1662 | } |
1663 | else { | |
2b9519f0 | 1664 | send = (U8*) s0 + expectlen; |
e308b348 | 1665 | } |
e308b348 | 1666 | |
eb83ed87 | 1667 | /* Now, loop through the remaining bytes in the character's sequence, |
e308b348 | 1668 | * accumulating each into the working value as we go. */ |
eb83ed87 | 1669 | for (s = s0 + 1; s < send; s++) { |
b5b9af04 | 1670 | if (LIKELY(UTF8_IS_CONTINUATION(*s))) { |
8850bf83 | 1671 | uv = UTF8_ACCUMULATE(uv, *s); |
2b5e7bc2 KW |
1672 | continue; |
1673 | } | |
1674 | ||
1675 | /* Here, found a non-continuation before processing all expected bytes. | |
1676 | * This byte indicates the beginning of a new character, so quit, even | |
1677 | * if allowing this malformation. */ | |
2b5e7bc2 | 1678 | possible_problems |= UTF8_GOT_NON_CONTINUATION; |
e308b348 | 1679 | break; |
eb83ed87 KW |
1680 | } /* End of loop through the character's bytes */ |
1681 | ||
1682 | /* Save how many bytes were actually in the character */ | |
1683 | curlen = s - s0; | |
1684 | ||
2b5e7bc2 KW |
1685 | /* Note that there are two types of too-short malformation. One is when |
1686 | * there is actual wrong data before the normal termination of the | |
1687 | * sequence. The other is that the sequence wasn't complete before the end | |
1688 | * of the data we are allowed to look at, based on the input 'curlen'. | |
1689 | * This means that we were passed data for a partial character, but it is | |
1690 | * valid as far as we saw. The other is definitely invalid. This | |
1691 | * distinction could be important to a caller, so the two types are kept | |
15b010f0 KW |
1692 | * separate. |
1693 | * | |
1694 | * A convenience macro that matches either of the too-short conditions. */ | |
1695 | # define UTF8_GOT_TOO_SHORT (UTF8_GOT_SHORT|UTF8_GOT_NON_CONTINUATION) | |
1696 | ||
1697 | if (UNLIKELY(possible_problems & UTF8_GOT_TOO_SHORT)) { | |
1698 | uv_so_far = uv; | |
1699 | uv = UNICODE_REPLACEMENT; | |
1700 | } | |
2b5e7bc2 | 1701 | |
08e73697 KW |
1702 | /* Check for overflow. The algorithm requires us to not look past the end |
1703 | * of the current character, even if partial, so the upper limit is 's' */ | |
e050c007 KW |
1704 | if (UNLIKELY(0 < does_utf8_overflow(s0, s, |
1705 | 1 /* Do consider overlongs */ | |
1706 | ))) | |
1707 | { | |
2b5e7bc2 KW |
1708 | possible_problems |= UTF8_GOT_OVERFLOW; |
1709 | uv = UNICODE_REPLACEMENT; | |
eb83ed87 | 1710 | } |
eb83ed87 | 1711 | |
2b5e7bc2 KW |
1712 | /* Check for overlong. If no problems so far, 'uv' is the correct code |
1713 | * point value. Simply see if it is expressible in fewer bytes. Otherwise | |
1714 | * we must look at the UTF-8 byte sequence itself to see if it is for an | |
1715 | * overlong */ | |
1716 | if ( ( LIKELY(! possible_problems) | |
1717 | && UNLIKELY(expectlen > (STRLEN) OFFUNISKIP(uv))) | |
56576a04 | 1718 | || ( UNLIKELY(possible_problems) |
2b5e7bc2 KW |
1719 | && ( UNLIKELY(! UTF8_IS_START(*s0)) |
1720 | || ( curlen > 1 | |
d6be65ae | 1721 | && UNLIKELY(0 < is_utf8_overlong_given_start_byte_ok(s0, |
08e73697 | 1722 | s - s0)))))) |
2f8f112e | 1723 | { |
2b5e7bc2 KW |
1724 | possible_problems |= UTF8_GOT_LONG; |
1725 | ||
abc28b54 | 1726 | if ( UNLIKELY( possible_problems & UTF8_GOT_TOO_SHORT) |
56576a04 | 1727 | |
abc28b54 KW |
1728 | /* The calculation in the 'true' branch of this 'if' |
1729 | * below won't work if overflows, and isn't needed | |
1730 | * anyway. Further below we handle all overflow | |
1731 | * cases */ | |
1732 | && LIKELY(! (possible_problems & UTF8_GOT_OVERFLOW))) | |
1733 | { | |
2b5e7bc2 KW |
1734 | UV min_uv = uv_so_far; |
1735 | STRLEN i; | |
1736 | ||
1737 | /* Here, the input is both overlong and is missing some trailing | |
1738 | * bytes. There is no single code point it could be for, but there | |
1739 | * may be enough information present to determine if what we have | |
1740 | * so far is for an unallowed code point, such as for a surrogate. | |
56576a04 KW |
1741 | * The code further below has the intelligence to determine this, |
1742 | * but just for non-overlong UTF-8 sequences. What we do here is | |
1743 | * calculate the smallest code point the input could represent if | |
1744 | * there were no too short malformation. Then we compute and save | |
1745 | * the UTF-8 for that, which is what the code below looks at | |
1746 | * instead of the raw input. It turns out that the smallest such | |
1747 | * code point is all we need. */ | |
2b5e7bc2 KW |
1748 | for (i = curlen; i < expectlen; i++) { |
1749 | min_uv = UTF8_ACCUMULATE(min_uv, | |
1750 | I8_TO_NATIVE_UTF8(UTF_CONTINUATION_MARK)); | |
1751 | } | |
1752 | ||
e9f2c446 | 1753 | adjusted_s0 = temp_char_buf; |
57ff5f59 | 1754 | (void) uvoffuni_to_utf8_flags(adjusted_s0, min_uv, 0); |
2b5e7bc2 | 1755 | } |
eb83ed87 KW |
1756 | } |
1757 | ||
56576a04 KW |
1758 | /* Here, we have found all the possible problems, except for when the input |
1759 | * is for a problematic code point not allowed by the input parameters. */ | |
1760 | ||
06188866 KW |
1761 | /* uv is valid for overlongs */ |
1762 | if ( ( ( LIKELY(! (possible_problems & ~UTF8_GOT_LONG)) | |
1763 | ||
1764 | /* isn't problematic if < this */ | |
1765 | && uv >= UNICODE_SURROGATE_FIRST) | |
2b5e7bc2 | 1766 | || ( UNLIKELY(possible_problems) |
d60baaa7 KW |
1767 | |
1768 | /* if overflow, we know without looking further | |
1769 | * precisely which of the problematic types it is, | |
1770 | * and we deal with those in the overflow handling | |
1771 | * code */ | |
1772 | && LIKELY(! (possible_problems & UTF8_GOT_OVERFLOW)) | |
57ff5f59 KW |
1773 | && ( isUTF8_POSSIBLY_PROBLEMATIC(*adjusted_s0) |
1774 | || UNLIKELY(isUTF8_PERL_EXTENDED(s0))))) | |
760c7c2f KW |
1775 | && ((flags & ( UTF8_DISALLOW_NONCHAR |
1776 | |UTF8_DISALLOW_SURROGATE | |
1777 | |UTF8_DISALLOW_SUPER | |
d044b7a7 | 1778 | |UTF8_DISALLOW_PERL_EXTENDED |
760c7c2f KW |
1779 | |UTF8_WARN_NONCHAR |
1780 | |UTF8_WARN_SURROGATE | |
1781 | |UTF8_WARN_SUPER | |
d22ec717 | 1782 | |UTF8_WARN_PERL_EXTENDED)))) |
eb83ed87 | 1783 | { |
2b5e7bc2 KW |
1784 | /* If there were no malformations, or the only malformation is an |
1785 | * overlong, 'uv' is valid */ | |
1786 | if (LIKELY(! (possible_problems & ~UTF8_GOT_LONG))) { | |
1787 | if (UNLIKELY(UNICODE_IS_SURROGATE(uv))) { | |
1788 | possible_problems |= UTF8_GOT_SURROGATE; | |
1789 | } | |
1790 | else if (UNLIKELY(uv > PERL_UNICODE_MAX)) { | |
1791 | possible_problems |= UTF8_GOT_SUPER; | |
1792 | } | |
1793 | else if (UNLIKELY(UNICODE_IS_NONCHAR(uv))) { | |
1794 | possible_problems |= UTF8_GOT_NONCHAR; | |
1795 | } | |
1796 | } | |
1797 | else { /* Otherwise, need to look at the source UTF-8, possibly | |
1798 | adjusted to be non-overlong */ | |
1799 | ||
1800 | if (UNLIKELY(NATIVE_UTF8_TO_I8(*adjusted_s0) | |
1801 | >= FIRST_START_BYTE_THAT_IS_DEFINITELY_SUPER)) | |
ea5ced44 | 1802 | { |
2b5e7bc2 KW |
1803 | possible_problems |= UTF8_GOT_SUPER; |
1804 | } | |
1805 | else if (curlen > 1) { | |
1806 | if (UNLIKELY(IS_UTF8_2_BYTE_SUPER( | |
1807 | NATIVE_UTF8_TO_I8(*adjusted_s0), | |
1808 | NATIVE_UTF8_TO_I8(*(adjusted_s0 + 1))))) | |
ea5ced44 | 1809 | { |
2b5e7bc2 | 1810 | possible_problems |= UTF8_GOT_SUPER; |
ea5ced44 | 1811 | } |
2b5e7bc2 KW |
1812 | else if (UNLIKELY(IS_UTF8_2_BYTE_SURROGATE( |
1813 | NATIVE_UTF8_TO_I8(*adjusted_s0), | |
1814 | NATIVE_UTF8_TO_I8(*(adjusted_s0 + 1))))) | |
1815 | { | |
1816 | possible_problems |= UTF8_GOT_SURROGATE; | |
ea5ced44 KW |
1817 | } |
1818 | } | |
c0236afe | 1819 | |
2b5e7bc2 KW |
1820 | /* We need a complete well-formed UTF-8 character to discern |
1821 | * non-characters, so can't look for them here */ | |
1822 | } | |
1823 | } | |
949cf498 | 1824 | |
2b5e7bc2 KW |
1825 | ready_to_handle_errors: |
1826 | ||
1827 | /* At this point: | |
1828 | * curlen contains the number of bytes in the sequence that | |
1829 | * this call should advance the input by. | |
e308b348 KW |
1830 | * avail_len gives the available number of bytes passed in, but |
1831 | * only if this is less than the expected number of | |
1832 | * bytes, based on the code point's start byte. | |
2b5e7bc2 KW |
1833 | * possible_problems' is 0 if there weren't any problems; otherwise a bit |
1834 | * is set in it for each potential problem found. | |
1835 | * uv contains the code point the input sequence | |
1836 | * represents; or if there is a problem that prevents | |
1837 | * a well-defined value from being computed, it is | |
1838 | * some subsitute value, typically the REPLACEMENT | |
1839 | * CHARACTER. | |
1840 | * s0 points to the first byte of the character | |
56576a04 KW |
1841 | * s points to just after were we left off processing |
1842 | * the character | |
1843 | * send points to just after where that character should | |
1844 | * end, based on how many bytes the start byte tells | |
1845 | * us should be in it, but no further than s0 + | |
1846 | * avail_len | |
2b5e7bc2 | 1847 | */ |
eb83ed87 | 1848 | |
2b5e7bc2 KW |
1849 | if (UNLIKELY(possible_problems)) { |
1850 | bool disallowed = FALSE; | |
1851 | const U32 orig_problems = possible_problems; | |
1852 | ||
37657a5b KW |
1853 | if (msgs) { |
1854 | *msgs = NULL; | |
1855 | } | |
1856 | ||
2b5e7bc2 KW |
1857 | while (possible_problems) { /* Handle each possible problem */ |
1858 | UV pack_warn = 0; | |
1859 | char * message = NULL; | |
37657a5b | 1860 | U32 this_flag_bit = 0; |
2b5e7bc2 KW |
1861 | |
1862 | /* Each 'if' clause handles one problem. They are ordered so that | |
1863 | * the first ones' messages will be displayed before the later | |
6c64cd9d KW |
1864 | * ones; this is kinda in decreasing severity order. But the |
1865 | * overlong must come last, as it changes 'uv' looked at by the | |
1866 | * others */ | |
2b5e7bc2 KW |
1867 | if (possible_problems & UTF8_GOT_OVERFLOW) { |
1868 | ||
56576a04 KW |
1869 | /* Overflow means also got a super and are using Perl's |
1870 | * extended UTF-8, but we handle all three cases here */ | |
2b5e7bc2 | 1871 | possible_problems |
d044b7a7 | 1872 | &= ~(UTF8_GOT_OVERFLOW|UTF8_GOT_SUPER|UTF8_GOT_PERL_EXTENDED); |
f9380377 KW |
1873 | *errors |= UTF8_GOT_OVERFLOW; |
1874 | ||
1875 | /* But the API says we flag all errors found */ | |
1876 | if (flags & (UTF8_WARN_SUPER|UTF8_DISALLOW_SUPER)) { | |
1877 | *errors |= UTF8_GOT_SUPER; | |
1878 | } | |
ddb65933 | 1879 | if (flags |
d044b7a7 | 1880 | & (UTF8_WARN_PERL_EXTENDED|UTF8_DISALLOW_PERL_EXTENDED)) |
ddb65933 | 1881 | { |
d044b7a7 | 1882 | *errors |= UTF8_GOT_PERL_EXTENDED; |
f9380377 | 1883 | } |
2b5e7bc2 | 1884 | |
d60baaa7 | 1885 | /* Disallow if any of the three categories say to */ |
56576a04 | 1886 | if ( ! (flags & UTF8_ALLOW_OVERFLOW) |
d60baaa7 | 1887 | || (flags & ( UTF8_DISALLOW_SUPER |
d044b7a7 | 1888 | |UTF8_DISALLOW_PERL_EXTENDED))) |
d60baaa7 KW |
1889 | { |
1890 | disallowed = TRUE; | |
1891 | } | |
1892 | ||
d22ec717 KW |
1893 | /* Likewise, warn if any say to */ |
1894 | if ( ! (flags & UTF8_ALLOW_OVERFLOW) | |
1895 | || (flags & (UTF8_WARN_SUPER|UTF8_WARN_PERL_EXTENDED))) | |
d60baaa7 | 1896 | { |
2b5e7bc2 | 1897 | |
ddb65933 KW |
1898 | /* The warnings code explicitly says it doesn't handle the |
1899 | * case of packWARN2 and two categories which have | |
1900 | * parent-child relationship. Even if it works now to | |
1901 | * raise the warning if either is enabled, it wouldn't | |
1902 | * necessarily do so in the future. We output (only) the | |
56576a04 | 1903 | * most dire warning */ |
ddb65933 | 1904 | if (! (flags & UTF8_CHECK_ONLY)) { |
37657a5b | 1905 | if (msgs || ckWARN_d(WARN_UTF8)) { |
ddb65933 KW |
1906 | pack_warn = packWARN(WARN_UTF8); |
1907 | } | |
37657a5b | 1908 | else if (msgs || ckWARN_d(WARN_NON_UNICODE)) { |
ddb65933 KW |
1909 | pack_warn = packWARN(WARN_NON_UNICODE); |
1910 | } | |
1911 | if (pack_warn) { | |
1912 | message = Perl_form(aTHX_ "%s: %s (overflows)", | |
1913 | malformed_text, | |
05b9033b | 1914 | _byte_dump_string(s0, curlen, 0)); |
37657a5b | 1915 | this_flag_bit = UTF8_GOT_OVERFLOW; |
ddb65933 | 1916 | } |
2b5e7bc2 KW |
1917 | } |
1918 | } | |
1919 | } | |
1920 | else if (possible_problems & UTF8_GOT_EMPTY) { | |
1921 | possible_problems &= ~UTF8_GOT_EMPTY; | |
f9380377 | 1922 | *errors |= UTF8_GOT_EMPTY; |
2b5e7bc2 KW |
1923 | |
1924 | if (! (flags & UTF8_ALLOW_EMPTY)) { | |
d1f8d421 KW |
1925 | |
1926 | /* This so-called malformation is now treated as a bug in | |
1927 | * the caller. If you have nothing to decode, skip calling | |
1928 | * this function */ | |
1929 | assert(0); | |
1930 | ||
2b5e7bc2 | 1931 | disallowed = TRUE; |
37657a5b KW |
1932 | if ( (msgs |
1933 | || ckWARN_d(WARN_UTF8)) && ! (flags & UTF8_CHECK_ONLY)) | |
1934 | { | |
2b5e7bc2 KW |
1935 | pack_warn = packWARN(WARN_UTF8); |
1936 | message = Perl_form(aTHX_ "%s (empty string)", | |
1937 | malformed_text); | |
37657a5b | 1938 | this_flag_bit = UTF8_GOT_EMPTY; |
2b5e7bc2 KW |
1939 | } |
1940 | } | |
1941 | } | |
1942 | else if (possible_problems & UTF8_GOT_CONTINUATION) { | |
1943 | possible_problems &= ~UTF8_GOT_CONTINUATION; | |
f9380377 | 1944 | *errors |= UTF8_GOT_CONTINUATION; |
2b5e7bc2 KW |
1945 | |
1946 | if (! (flags & UTF8_ALLOW_CONTINUATION)) { | |
1947 | disallowed = TRUE; | |
37657a5b KW |
1948 | if (( msgs |
1949 | || ckWARN_d(WARN_UTF8)) && ! (flags & UTF8_CHECK_ONLY)) | |
1950 | { | |
2b5e7bc2 KW |
1951 | pack_warn = packWARN(WARN_UTF8); |
1952 | message = Perl_form(aTHX_ | |
1953 | "%s: %s (unexpected continuation byte 0x%02x," | |
1954 | " with no preceding start byte)", | |
1955 | malformed_text, | |
7e2f38b2 | 1956 | _byte_dump_string(s0, 1, 0), *s0); |
37657a5b | 1957 | this_flag_bit = UTF8_GOT_CONTINUATION; |
2b5e7bc2 KW |
1958 | } |
1959 | } | |
1960 | } | |
2b5e7bc2 KW |
1961 | else if (possible_problems & UTF8_GOT_SHORT) { |
1962 | possible_problems &= ~UTF8_GOT_SHORT; | |
f9380377 | 1963 | *errors |= UTF8_GOT_SHORT; |
2b5e7bc2 KW |
1964 | |
1965 | if (! (flags & UTF8_ALLOW_SHORT)) { | |
1966 | disallowed = TRUE; | |
37657a5b KW |
1967 | if (( msgs |
1968 | || ckWARN_d(WARN_UTF8)) && ! (flags & UTF8_CHECK_ONLY)) | |
1969 | { | |
2b5e7bc2 KW |
1970 | pack_warn = packWARN(WARN_UTF8); |
1971 | message = Perl_form(aTHX_ | |
56576a04 KW |
1972 | "%s: %s (too short; %d byte%s available, need %d)", |
1973 | malformed_text, | |
1974 | _byte_dump_string(s0, send - s0, 0), | |
1975 | (int)avail_len, | |
1976 | avail_len == 1 ? "" : "s", | |
1977 | (int)expectlen); | |
37657a5b | 1978 | this_flag_bit = UTF8_GOT_SHORT; |
2b5e7bc2 KW |
1979 | } |
1980 | } | |
ba210ebe | 1981 | |
2b5e7bc2 | 1982 | } |
e308b348 KW |
1983 | else if (possible_problems & UTF8_GOT_NON_CONTINUATION) { |
1984 | possible_problems &= ~UTF8_GOT_NON_CONTINUATION; | |
1985 | *errors |= UTF8_GOT_NON_CONTINUATION; | |
1986 | ||
1987 | if (! (flags & UTF8_ALLOW_NON_CONTINUATION)) { | |
1988 | disallowed = TRUE; | |
37657a5b KW |
1989 | if (( msgs |
1990 | || ckWARN_d(WARN_UTF8)) && ! (flags & UTF8_CHECK_ONLY)) | |
1991 | { | |
99a765e9 KW |
1992 | |
1993 | /* If we don't know for sure that the input length is | |
1994 | * valid, avoid as much as possible reading past the | |
1995 | * end of the buffer */ | |
1996 | int printlen = (flags & _UTF8_NO_CONFIDENCE_IN_CURLEN) | |
1997 | ? s - s0 | |
1998 | : send - s0; | |
e308b348 KW |
1999 | pack_warn = packWARN(WARN_UTF8); |
2000 | message = Perl_form(aTHX_ "%s", | |
2001 | unexpected_non_continuation_text(s0, | |
99a765e9 | 2002 | printlen, |
e308b348 KW |
2003 | s - s0, |
2004 | (int) expectlen)); | |
37657a5b | 2005 | this_flag_bit = UTF8_GOT_NON_CONTINUATION; |
e308b348 KW |
2006 | } |
2007 | } | |
2008 | } | |
2b5e7bc2 KW |
2009 | else if (possible_problems & UTF8_GOT_SURROGATE) { |
2010 | possible_problems &= ~UTF8_GOT_SURROGATE; | |
2011 | ||
f9380377 KW |
2012 | if (flags & UTF8_WARN_SURROGATE) { |
2013 | *errors |= UTF8_GOT_SURROGATE; | |
2014 | ||
2015 | if ( ! (flags & UTF8_CHECK_ONLY) | |
37657a5b | 2016 | && (msgs || ckWARN_d(WARN_SURROGATE))) |
f9380377 | 2017 | { |
2b5e7bc2 KW |
2018 | pack_warn = packWARN(WARN_SURROGATE); |
2019 | ||
2020 | /* These are the only errors that can occur with a | |
2021 | * surrogate when the 'uv' isn't valid */ | |
2022 | if (orig_problems & UTF8_GOT_TOO_SHORT) { | |
2023 | message = Perl_form(aTHX_ | |
2024 | "UTF-16 surrogate (any UTF-8 sequence that" | |
2025 | " starts with \"%s\" is for a surrogate)", | |
7e2f38b2 | 2026 | _byte_dump_string(s0, curlen, 0)); |
2b5e7bc2 KW |
2027 | } |
2028 | else { | |
c94c2f39 | 2029 | message = Perl_form(aTHX_ surrogate_cp_format, uv); |
2b5e7bc2 | 2030 | } |
37657a5b | 2031 | this_flag_bit = UTF8_GOT_SURROGATE; |
f9380377 | 2032 | } |
2b5e7bc2 | 2033 | } |
ba210ebe | 2034 | |
2b5e7bc2 KW |
2035 | if (flags & UTF8_DISALLOW_SURROGATE) { |
2036 | disallowed = TRUE; | |
f9380377 | 2037 | *errors |= UTF8_GOT_SURROGATE; |
2b5e7bc2 KW |
2038 | } |
2039 | } | |
2040 | else if (possible_problems & UTF8_GOT_SUPER) { | |
2041 | possible_problems &= ~UTF8_GOT_SUPER; | |
949cf498 | 2042 | |
f9380377 KW |
2043 | if (flags & UTF8_WARN_SUPER) { |
2044 | *errors |= UTF8_GOT_SUPER; | |
2045 | ||
2046 | if ( ! (flags & UTF8_CHECK_ONLY) | |
37657a5b | 2047 | && (msgs || ckWARN_d(WARN_NON_UNICODE))) |
f9380377 | 2048 | { |
2b5e7bc2 KW |
2049 | pack_warn = packWARN(WARN_NON_UNICODE); |
2050 | ||
2051 | if (orig_problems & UTF8_GOT_TOO_SHORT) { | |
2052 | message = Perl_form(aTHX_ | |
2053 | "Any UTF-8 sequence that starts with" | |
2054 | " \"%s\" is for a non-Unicode code point," | |
2055 | " may not be portable", | |
7e2f38b2 | 2056 | _byte_dump_string(s0, curlen, 0)); |
2b5e7bc2 KW |
2057 | } |
2058 | else { | |
c94c2f39 | 2059 | message = Perl_form(aTHX_ super_cp_format, uv); |
2b5e7bc2 | 2060 | } |
37657a5b | 2061 | this_flag_bit = UTF8_GOT_SUPER; |
f9380377 | 2062 | } |
2b5e7bc2 | 2063 | } |
ba210ebe | 2064 | |
57ff5f59 KW |
2065 | /* Test for Perl's extended UTF-8 after the regular SUPER ones, |
2066 | * and before possibly bailing out, so that the more dire | |
2067 | * warning will override the regular one. */ | |
2068 | if (UNLIKELY(isUTF8_PERL_EXTENDED(s0))) { | |
2b5e7bc2 | 2069 | if ( ! (flags & UTF8_CHECK_ONLY) |
d044b7a7 | 2070 | && (flags & (UTF8_WARN_PERL_EXTENDED|UTF8_WARN_SUPER)) |
37657a5b | 2071 | && (msgs || ckWARN_d(WARN_NON_UNICODE))) |
2b5e7bc2 | 2072 | { |
db0f09e6 | 2073 | pack_warn = packWARN(WARN_NON_UNICODE); |
2b5e7bc2 | 2074 | |
57ff5f59 KW |
2075 | /* If it is an overlong that evaluates to a code point |
2076 | * that doesn't have to use the Perl extended UTF-8, it | |
2077 | * still used it, and so we output a message that | |
2078 | * doesn't refer to the code point. The same is true | |
2079 | * if there was a SHORT malformation where the code | |
2080 | * point is not valid. In that case, 'uv' will have | |
2081 | * been set to the REPLACEMENT CHAR, and the message | |
2082 | * below without the code point in it will be selected | |
2083 | * */ | |
2084 | if (UNICODE_IS_PERL_EXTENDED(uv)) { | |
2b5e7bc2 | 2085 | message = Perl_form(aTHX_ |
57ff5f59 | 2086 | perl_extended_cp_format, uv); |
2b5e7bc2 KW |
2087 | } |
2088 | else { | |
2089 | message = Perl_form(aTHX_ | |
57ff5f59 KW |
2090 | "Any UTF-8 sequence that starts with" |
2091 | " \"%s\" is a Perl extension, and" | |
2092 | " so is not portable", | |
2093 | _byte_dump_string(s0, curlen, 0)); | |
2b5e7bc2 | 2094 | } |
37657a5b | 2095 | this_flag_bit = UTF8_GOT_PERL_EXTENDED; |
2b5e7bc2 KW |
2096 | } |
2097 | ||
d044b7a7 KW |
2098 | if (flags & ( UTF8_WARN_PERL_EXTENDED |
2099 | |UTF8_DISALLOW_PERL_EXTENDED)) | |
ddb65933 | 2100 | { |
d044b7a7 | 2101 | *errors |= UTF8_GOT_PERL_EXTENDED; |
f9380377 | 2102 | |
d044b7a7 | 2103 | if (flags & UTF8_DISALLOW_PERL_EXTENDED) { |
f9380377 KW |
2104 | disallowed = TRUE; |
2105 | } | |
2b5e7bc2 KW |
2106 | } |
2107 | } | |
eb83ed87 | 2108 | |
2b5e7bc2 | 2109 | if (flags & UTF8_DISALLOW_SUPER) { |
f9380377 | 2110 | *errors |= UTF8_GOT_SUPER; |
2b5e7bc2 KW |
2111 | disallowed = TRUE; |
2112 | } | |
2b5e7bc2 KW |
2113 | } |
2114 | else if (possible_problems & UTF8_GOT_NONCHAR) { | |
2115 | possible_problems &= ~UTF8_GOT_NONCHAR; | |
ba210ebe | 2116 | |
f9380377 KW |
2117 | if (flags & UTF8_WARN_NONCHAR) { |
2118 | *errors |= UTF8_GOT_NONCHAR; | |
2119 | ||
2120 | if ( ! (flags & UTF8_CHECK_ONLY) | |
37657a5b | 2121 | && (msgs || ckWARN_d(WARN_NONCHAR))) |
f9380377 | 2122 | { |
2b5e7bc2 KW |
2123 | /* The code above should have guaranteed that we don't |
2124 | * get here with errors other than overlong */ | |
2125 | assert (! (orig_problems | |
2126 | & ~(UTF8_GOT_LONG|UTF8_GOT_NONCHAR))); | |
2127 | ||
2128 | pack_warn = packWARN(WARN_NONCHAR); | |
c94c2f39 | 2129 | message = Perl_form(aTHX_ nonchar_cp_format, uv); |
37657a5b | 2130 | this_flag_bit = UTF8_GOT_NONCHAR; |
f9380377 | 2131 | } |
2b5e7bc2 | 2132 | } |
5b311467 | 2133 | |
2b5e7bc2 KW |
2134 | if (flags & UTF8_DISALLOW_NONCHAR) { |
2135 | disallowed = TRUE; | |
f9380377 | 2136 | *errors |= UTF8_GOT_NONCHAR; |
2b5e7bc2 | 2137 | } |
6c64cd9d KW |
2138 | } |
2139 | else if (possible_problems & UTF8_GOT_LONG) { | |
2140 | possible_problems &= ~UTF8_GOT_LONG; | |
2141 | *errors |= UTF8_GOT_LONG; | |
2142 | ||
2143 | if (flags & UTF8_ALLOW_LONG) { | |
2144 | ||
2145 | /* We don't allow the actual overlong value, unless the | |
2146 | * special extra bit is also set */ | |
2147 | if (! (flags & ( UTF8_ALLOW_LONG_AND_ITS_VALUE | |
2148 | & ~UTF8_ALLOW_LONG))) | |
2149 | { | |
2150 | uv = UNICODE_REPLACEMENT; | |
2151 | } | |
2152 | } | |
2153 | else { | |
2154 | disallowed = TRUE; | |
2155 | ||
37657a5b KW |
2156 | if (( msgs |
2157 | || ckWARN_d(WARN_UTF8)) && ! (flags & UTF8_CHECK_ONLY)) | |
2158 | { | |
6c64cd9d KW |
2159 | pack_warn = packWARN(WARN_UTF8); |
2160 | ||
2161 | /* These error types cause 'uv' to be something that | |
2162 | * isn't what was intended, so can't use it in the | |
2163 | * message. The other error types either can't | |
2164 | * generate an overlong, or else the 'uv' is valid */ | |
2165 | if (orig_problems & | |
2166 | (UTF8_GOT_TOO_SHORT|UTF8_GOT_OVERFLOW)) | |
2167 | { | |
2168 | message = Perl_form(aTHX_ | |
2169 | "%s: %s (any UTF-8 sequence that starts" | |
2170 | " with \"%s\" is overlong which can and" | |
2171 | " should be represented with a" | |
2172 | " different, shorter sequence)", | |
2173 | malformed_text, | |
2174 | _byte_dump_string(s0, send - s0, 0), | |
2175 | _byte_dump_string(s0, curlen, 0)); | |
2176 | } | |
2177 | else { | |
2178 | U8 tmpbuf[UTF8_MAXBYTES+1]; | |
1be62ab9 KW |
2179 | const U8 * const e = uvoffuni_to_utf8_flags(tmpbuf, |
2180 | uv, 0); | |
d819dc50 KW |
2181 | /* Don't use U+ for non-Unicode code points, which |
2182 | * includes those in the Latin1 range */ | |
2183 | const char * preface = ( uv > PERL_UNICODE_MAX | |
2184 | #ifdef EBCDIC | |
2185 | || uv <= 0xFF | |
2186 | #endif | |
2187 | ) | |
2188 | ? "0x" | |
2189 | : "U+"; | |
6c64cd9d KW |
2190 | message = Perl_form(aTHX_ |
2191 | "%s: %s (overlong; instead use %s to represent" | |
2192 | " %s%0*" UVXf ")", | |
2193 | malformed_text, | |
2194 | _byte_dump_string(s0, send - s0, 0), | |
2195 | _byte_dump_string(tmpbuf, e - tmpbuf, 0), | |
2196 | preface, | |
2197 | ((uv < 256) ? 2 : 4), /* Field width of 2 for | |
2198 | small code points */ | |
1be62ab9 | 2199 | UNI_TO_NATIVE(uv)); |
6c64cd9d | 2200 | } |
37657a5b | 2201 | this_flag_bit = UTF8_GOT_LONG; |
6c64cd9d KW |
2202 | } |
2203 | } | |
2b5e7bc2 KW |
2204 | } /* End of looking through the possible flags */ |
2205 | ||
2206 | /* Display the message (if any) for the problem being handled in | |
2207 | * this iteration of the loop */ | |
2208 | if (message) { | |
37657a5b | 2209 | if (msgs) { |
37657a5b KW |
2210 | assert(this_flag_bit); |
2211 | ||
2212 | if (*msgs == NULL) { | |
2213 | *msgs = newAV(); | |
2214 | } | |
2215 | ||
bb07812e KW |
2216 | av_push(*msgs, newRV_noinc((SV*) new_msg_hv(message, |
2217 | pack_warn, | |
2218 | this_flag_bit))); | |
37657a5b KW |
2219 | } |
2220 | else if (PL_op) | |
2b5e7bc2 KW |
2221 | Perl_warner(aTHX_ pack_warn, "%s in %s", message, |
2222 | OP_DESC(PL_op)); | |
2223 | else | |
2224 | Perl_warner(aTHX_ pack_warn, "%s", message); | |
2225 | } | |
ddb65933 | 2226 | } /* End of 'while (possible_problems)' */ |
a0dbb045 | 2227 | |
2b5e7bc2 KW |
2228 | /* Since there was a possible problem, the returned length may need to |
2229 | * be changed from the one stored at the beginning of this function. | |
2230 | * Instead of trying to figure out if that's needed, just do it. */ | |
2231 | if (retlen) { | |
2232 | *retlen = curlen; | |
2233 | } | |
a0dbb045 | 2234 | |
2b5e7bc2 KW |
2235 | if (disallowed) { |
2236 | if (flags & UTF8_CHECK_ONLY && retlen) { | |
2237 | *retlen = ((STRLEN) -1); | |
2238 | } | |
2239 | return 0; | |
2240 | } | |
eb83ed87 | 2241 | } |
ba210ebe | 2242 | |
2b5e7bc2 | 2243 | return UNI_TO_NATIVE(uv); |
a0ed51b3 LW |
2244 | } |
2245 | ||
8e84507e | 2246 | /* |
ec5f19d0 KW |
2247 | =for apidoc utf8_to_uvchr_buf |
2248 | ||
2249 | Returns the native code point of the first character in the string C<s> which | |
2250 | is assumed to be in UTF-8 encoding; C<send> points to 1 beyond the end of C<s>. | |
524080c4 | 2251 | C<*retlen> will be set to the length, in bytes, of that character. |
ec5f19d0 | 2252 | |
524080c4 KW |
2253 | If C<s> does not point to a well-formed UTF-8 character and UTF8 warnings are |
2254 | enabled, zero is returned and C<*retlen> is set (if C<retlen> isn't | |
796b6530 | 2255 | C<NULL>) to -1. If those warnings are off, the computed value, if well-defined |
173db420 | 2256 | (or the Unicode REPLACEMENT CHARACTER if not), is silently returned, and |
796b6530 | 2257 | C<*retlen> is set (if C<retlen> isn't C<NULL>) so that (S<C<s> + C<*retlen>>) is |
173db420 | 2258 | the next possible position in C<s> that could begin a non-malformed character. |
de69f3af | 2259 | See L</utf8n_to_uvchr> for details on when the REPLACEMENT CHARACTER is |
173db420 | 2260 | returned. |
ec5f19d0 KW |
2261 | |
2262 | =cut | |
52be2536 KW |
2263 | |
2264 | Also implemented as a macro in utf8.h | |
2265 | ||
ec5f19d0 KW |
2266 | */ |
2267 | ||
2268 | ||
2269 | UV | |
2270 | Perl_utf8_to_uvchr_buf(pTHX_ const U8 *s, const U8 *send, STRLEN *retlen) | |
2271 | { | |
7f974d7e KW |
2272 | PERL_ARGS_ASSERT_UTF8_TO_UVCHR_BUF; |
2273 | ||
ec5f19d0 KW |
2274 | assert(s < send); |
2275 | ||
2276 | return utf8n_to_uvchr(s, send - s, retlen, | |
ddb65933 | 2277 | ckWARN_d(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY); |
ec5f19d0 KW |
2278 | } |
2279 | ||
52be2536 KW |
2280 | /* This is marked as deprecated |
2281 | * | |
ec5f19d0 KW |
2282 | =for apidoc utf8_to_uvuni_buf |
2283 | ||
de69f3af KW |
2284 | Only in very rare circumstances should code need to be dealing in Unicode |
2285 | (as opposed to native) code points. In those few cases, use | |
07dfe0a4 KW |
2286 | C<L<NATIVE_TO_UNI(utf8_to_uvchr_buf(...))|/utf8_to_uvchr_buf>> instead. If you |
2287 | are not absolutely sure this is one of those cases, then assume it isn't and | |
2288 | use plain C<utf8_to_uvchr_buf> instead. | |
4f83cdcd KW |
2289 | |
2290 | Returns the Unicode (not-native) code point of the first character in the | |
2291 | string C<s> which | |
ec5f19d0 KW |
2292 | is assumed to be in UTF-8 encoding; C<send> points to 1 beyond the end of C<s>. |
2293 | C<retlen> will be set to the length, in bytes, of that character. | |
2294 | ||
524080c4 KW |
2295 | If C<s> does not point to a well-formed UTF-8 character and UTF8 warnings are |
2296 | enabled, zero is returned and C<*retlen> is set (if C<retlen> isn't | |
2297 | NULL) to -1. If those warnings are off, the computed value if well-defined (or | |
2298 | the Unicode REPLACEMENT CHARACTER, if not) is silently returned, and C<*retlen> | |
2299 | is set (if C<retlen> isn't NULL) so that (S<C<s> + C<*retlen>>) is the | |
2300 | next possible position in C<s> that could begin a non-malformed character. | |
de69f3af | 2301 | See L</utf8n_to_uvchr> for details on when the REPLACEMENT CHARACTER is returned. |
ec5f19d0 KW |
2302 | |
2303 | =cut | |
2304 | */ | |
2305 | ||
2306 | UV | |
2307 | Perl_utf8_to_uvuni_buf(pTHX_ const U8 *s, const U8 *send, STRLEN *retlen) | |
2308 | { | |
2309 | PERL_ARGS_ASSERT_UTF8_TO_UVUNI_BUF; | |
2310 | ||
2311 | assert(send > s); | |
2312 | ||
5962d97e | 2313 | return NATIVE_TO_UNI(utf8_to_uvchr_buf(s, send, retlen)); |
ec5f19d0 KW |
2314 | } |
2315 | ||
b76347f2 | 2316 | /* |
87cea99e | 2317 | =for apidoc utf8_length |
b76347f2 | 2318 | |
b2e7ed74 KW |
2319 | Returns the number of characters in the sequence of UTF-8-encoded bytes starting |
2320 | at C<s> and ending at the byte just before C<e>. If <s> and <e> point to the | |
2321 | same place, it returns 0 with no warning raised. | |
2322 | ||
2323 | If C<e E<lt> s> or if the scan would end up past C<e>, it raises a UTF8 warning | |
2324 | and returns the number of valid characters. | |
b76347f2 JH |
2325 | |
2326 | =cut | |
2327 | */ | |
2328 | ||
2329 | STRLEN | |
35a4481c | 2330 | Perl_utf8_length(pTHX_ const U8 *s, const U8 *e) |
b76347f2 JH |
2331 | { |
2332 | STRLEN len = 0; | |
2333 | ||
7918f24d NC |
2334 | PERL_ARGS_ASSERT_UTF8_LENGTH; |
2335 | ||
8850bf83 JH |
2336 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g. |
2337 | * the bitops (especially ~) can create illegal UTF-8. | |
2338 | * In other words: in Perl UTF-8 is not just for Unicode. */ | |
2339 | ||
12c43b0a | 2340 | if (UNLIKELY(e < s)) |
a3b680e6 | 2341 | goto warn_and_return; |
b76347f2 | 2342 | while (s < e) { |
4cbf4130 | 2343 | s += UTF8SKIP(s); |
8e91ec7f AV |
2344 | len++; |
2345 | } | |
2346 | ||
12c43b0a | 2347 | if (UNLIKELY(e != s)) { |
8e91ec7f AV |
2348 | len--; |
2349 | warn_and_return: | |
9b387841 NC |
2350 | if (PL_op) |
2351 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), | |
2352 | "%s in %s", unees, OP_DESC(PL_op)); | |
2353 | else | |
61a12c31 | 2354 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "%s", unees); |
b76347f2 JH |
2355 | } |
2356 | ||
2357 | return len; | |
2358 | } | |
2359 | ||
b06226ff | 2360 | /* |
fed3ba5d NC |
2361 | =for apidoc bytes_cmp_utf8 |
2362 | ||
a1433954 | 2363 | Compares the sequence of characters (stored as octets) in C<b>, C<blen> with the |
72d33970 FC |
2364 | sequence of characters (stored as UTF-8) |
2365 | in C<u>, C<ulen>. Returns 0 if they are | |
fed3ba5d NC |
2366 | equal, -1 or -2 if the first string is less than the second string, +1 or +2 |
2367 | if the first string is greater than the second string. | |
2368 | ||
2369 | -1 or +1 is returned if the shorter string was identical to the start of the | |
72d33970 FC |
2370 | longer string. -2 or +2 is returned if |
2371 | there was a difference between characters | |
fed3ba5d NC |
2372 | within the strings. |
2373 | ||
2374 | =cut | |
2375 | */ | |
2376 | ||
2377 | int | |
2378 | Perl_bytes_cmp_utf8(pTHX_ const U8 *b, STRLEN blen, const U8 *u, STRLEN ulen) | |
2379 | { | |
2380 | const U8 *const bend = b + blen; | |
2381 | const U8 *const uend = u + ulen; | |
2382 | ||
2383 | PERL_ARGS_ASSERT_BYTES_CMP_UTF8; | |
fed3ba5d NC |
2384 | |
2385 | while (b < bend && u < uend) { | |
2386 | U8 c = *u++; | |
2387 | if (!UTF8_IS_INVARIANT(c)) { | |
2388 | if (UTF8_IS_DOWNGRADEABLE_START(c)) { | |
2389 | if (u < uend) { | |
2390 | U8 c1 = *u++; | |
2391 | if (UTF8_IS_CONTINUATION(c1)) { | |
a62b247b | 2392 | c = EIGHT_BIT_UTF8_TO_NATIVE(c, c1); |
fed3ba5d | 2393 | } else { |
2b5e7bc2 | 2394 | /* diag_listed_as: Malformed UTF-8 character%s */ |
fed3ba5d | 2395 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), |
56576a04 KW |
2396 | "%s %s%s", |
2397 | unexpected_non_continuation_text(u - 2, 2, 1, 2), | |
2398 | PL_op ? " in " : "", | |
2399 | PL_op ? OP_DESC(PL_op) : ""); | |
fed3ba5d NC |
2400 | return -2; |
2401 | } | |
2402 | } else { | |
2403 | if (PL_op) | |
2404 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), | |
2405 | "%s in %s", unees, OP_DESC(PL_op)); | |
2406 | else | |
61a12c31 | 2407 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "%s", unees); |
fed3ba5d NC |
2408 | return -2; /* Really want to return undef :-) */ |
2409 | } | |
2410 | } else { | |
2411 | return -2; | |
2412 | } | |
2413 | } | |
2414 | if (*b != c) { | |
2415 | return *b < c ? -2 : +2; | |
2416 | } | |
2417 | ++b; | |
2418 | } | |
2419 | ||
2420 | if (b == bend && u == uend) | |
2421 | return 0; | |
2422 | ||
2423 | return b < bend ? +1 : -1; | |
2424 | } | |
2425 | ||
2426 | /* | |
87cea99e | 2427 | =for apidoc utf8_to_bytes |
6940069f | 2428 | |
3bc0c78c | 2429 | Converts a string C<"s"> of length C<*lenp> from UTF-8 into native byte encoding. |
a1433954 | 2430 | Unlike L</bytes_to_utf8>, this over-writes the original string, and |
09af0336 | 2431 | updates C<*lenp> to contain the new length. |
3bc0c78c KW |
2432 | Returns zero on failure (leaving C<"s"> unchanged) setting C<*lenp> to -1. |
2433 | ||
2434 | Upon successful return, the number of variants in the string can be computed by | |
23b37b12 KW |
2435 | having saved the value of C<*lenp> before the call, and subtracting the |
2436 | after-call value of C<*lenp> from it. | |
6940069f | 2437 | |
a1433954 | 2438 | If you need a copy of the string, see L</bytes_from_utf8>. |
95be277c | 2439 | |
6940069f GS |
2440 | =cut |
2441 | */ | |
2442 | ||
2443 | U8 * | |
09af0336 | 2444 | Perl_utf8_to_bytes(pTHX_ U8 *s, STRLEN *lenp) |
6940069f | 2445 | { |
9fe0d3c2 | 2446 | U8 * first_variant; |
246fae53 | 2447 | |
7918f24d | 2448 | PERL_ARGS_ASSERT_UTF8_TO_BYTES; |
81611534 | 2449 | PERL_UNUSED_CONTEXT; |
7918f24d | 2450 | |
9fe0d3c2 | 2451 | /* This is a no-op if no variants at all in the input */ |
09af0336 | 2452 | if (is_utf8_invariant_string_loc(s, *lenp, (const U8 **) &first_variant)) { |
9fe0d3c2 KW |
2453 | return s; |
2454 | } | |
2455 | ||
2456 | { | |
3c5aa262 | 2457 | U8 * const save = s; |
09af0336 | 2458 | U8 * const send = s + *lenp; |
3c5aa262 KW |
2459 | U8 * d; |
2460 | ||
2461 | /* Nothing before the first variant needs to be changed, so start the real | |
2462 | * work there */ | |
2463 | s = first_variant; | |
2464 | while (s < send) { | |
2465 | if (! UTF8_IS_INVARIANT(*s)) { | |
2466 | if (! UTF8_IS_NEXT_CHAR_DOWNGRADEABLE(s, send)) { | |
09af0336 | 2467 | *lenp = ((STRLEN) -1); |
3c5aa262 KW |
2468 | return 0; |
2469 | } | |
2470 | s++; | |
d59937ca KW |
2471 | } |
2472 | s++; | |
dcad2880 | 2473 | } |
dcad2880 | 2474 | |
3c5aa262 KW |
2475 | /* Is downgradable, so do it */ |
2476 | d = s = first_variant; | |
2477 | while (s < send) { | |
2478 | U8 c = *s++; | |
2479 | if (! UVCHR_IS_INVARIANT(c)) { | |
2480 | /* Then it is two-byte encoded */ | |
2481 | c = EIGHT_BIT_UTF8_TO_NATIVE(c, *s); | |
2482 | s++; | |
2483 | } | |
2484 | *d++ = c; | |
2485 | } | |
2486 | *d = '\0'; | |
09af0336 | 2487 | *lenp = d - save; |
3c5aa262 KW |
2488 | |
2489 | return save; | |
9fe0d3c2 | 2490 | } |
6940069f GS |
2491 | } |
2492 | ||
2493 | /* | |
87cea99e | 2494 | =for apidoc bytes_from_utf8 |
f9a63242 | 2495 | |
09af0336 | 2496 | Converts a potentially UTF-8 encoded string C<s> of length C<*lenp> into native |
41ae6089 | 2497 | byte encoding. On input, the boolean C<*is_utf8p> gives whether or not C<s> is |
4f3d592d KW |
2498 | actually encoded in UTF-8. |
2499 | ||
2500 | Unlike L</utf8_to_bytes> but like L</bytes_to_utf8>, this is non-destructive of | |
2501 | the input string. | |
2502 | ||
41ae6089 KW |
2503 | Do nothing if C<*is_utf8p> is 0, or if there are code points in the string |
2504 | not expressible in native byte encoding. In these cases, C<*is_utf8p> and | |
09af0336 | 2505 | C<*lenp> are unchanged, and the return value is the original C<s>. |
4f3d592d | 2506 | |
41ae6089 | 2507 | Otherwise, C<*is_utf8p> is set to 0, and the return value is a pointer to a |
4f3d592d | 2508 | newly created string containing a downgraded copy of C<s>, and whose length is |
9ff99fb3 KW |
2509 | returned in C<*lenp>, updated. The new string is C<NUL>-terminated. The |
2510 | caller is responsible for arranging for the memory used by this string to get | |
2511 | freed. | |
f9a63242 | 2512 | |
3bc0c78c | 2513 | Upon successful return, the number of variants in the string can be computed by |
23b37b12 KW |
2514 | having saved the value of C<*lenp> before the call, and subtracting the |
2515 | after-call value of C<*lenp> from it. | |
3bc0c78c | 2516 | |
37607a96 | 2517 | =cut |
976c1b08 KW |
2518 | |
2519 | There is a macro that avoids this function call, but this is retained for | |
2520 | anyone who calls it with the Perl_ prefix */ | |
f9a63242 JH |
2521 | |
2522 | U8 * | |
41ae6089 | 2523 | Perl_bytes_from_utf8(pTHX_ const U8 *s, STRLEN *lenp, bool *is_utf8p) |
f9a63242 | 2524 | { |
7918f24d | 2525 | PERL_ARGS_ASSERT_BYTES_FROM_UTF8; |
96a5add6 | 2526 | PERL_UNUSED_CONTEXT; |
f9a63242 | 2527 | |
976c1b08 KW |
2528 | return bytes_from_utf8_loc(s, lenp, is_utf8p, NULL); |
2529 | } | |
2530 | ||
2531 | /* | |
2532 | No = here because currently externally undocumented | |
2533 | for apidoc bytes_from_utf8_loc | |
2534 | ||
2535 | Like C<L</bytes_from_utf8>()>, but takes an extra parameter, a pointer to where | |
2536 | to store the location of the first character in C<"s"> that cannot be | |
2537 | converted to non-UTF8. | |
2538 | ||
2539 | If that parameter is C<NULL>, this function behaves identically to | |
2540 | C<bytes_from_utf8>. | |
2541 | ||
2542 | Otherwise if C<*is_utf8p> is 0 on input, the function behaves identically to | |
2543 | C<bytes_from_utf8>, except it also sets C<*first_non_downgradable> to C<NULL>. | |
2544 | ||
2545 | Otherwise, the function returns a newly created C<NUL>-terminated string | |
2546 | containing the non-UTF8 equivalent of the convertible first portion of | |
2547 | C<"s">. C<*lenp> is set to its length, not including the terminating C<NUL>. | |
2548 | If the entire input string was converted, C<*is_utf8p> is set to a FALSE value, | |
2549 | and C<*first_non_downgradable> is set to C<NULL>. | |
2550 | ||
2551 | Otherwise, C<*first_non_downgradable> set to point to the first byte of the | |
2552 | first character in the original string that wasn't converted. C<*is_utf8p> is | |
2553 | unchanged. Note that the new string may have length 0. | |
2554 | ||
2555 | Another way to look at it is, if C<*first_non_downgradable> is non-C<NULL> and | |
2556 | C<*is_utf8p> is TRUE, this function starts at the beginning of C<"s"> and | |
2557 | converts as many characters in it as possible stopping at the first one it | |
385b74be | 2558 | finds that can't be converted to non-UTF-8. C<*first_non_downgradable> is |
976c1b08 KW |
2559 | set to point to that. The function returns the portion that could be converted |
2560 | in a newly created C<NUL>-terminated string, and C<*lenp> is set to its length, | |
2561 | not including the terminating C<NUL>. If the very first character in the | |
2562 | original could not be converted, C<*lenp> will be 0, and the new string will | |
2563 | contain just a single C<NUL>. If the entire input string was converted, | |
2564 | C<*is_utf8p> is set to FALSE and C<*first_non_downgradable> is set to C<NULL>. | |
2565 | ||
2566 | Upon successful return, the number of variants in the converted portion of the | |
2567 | string can be computed by having saved the value of C<*lenp> before the call, | |
2568 | and subtracting the after-call value of C<*lenp> from it. | |
2569 | ||
2570 | =cut | |
2571 | ||
2572 | ||
2573 | */ | |
2574 | ||
2575 | U8 * | |
2576 | Perl_bytes_from_utf8_loc(const U8 *s, STRLEN *lenp, bool *is_utf8p, const U8** first_unconverted) | |
2577 | { | |
2578 | U8 *d; | |
2579 | const U8 *original = s; | |
2580 | U8 *converted_start; | |
2581 | const U8 *send = s + *lenp; | |
f9a63242 | 2582 | |
976c1b08 | 2583 | PERL_ARGS_ASSERT_BYTES_FROM_UTF8_LOC; |
170a1c22 | 2584 | |
976c1b08 KW |
2585 | if (! *is_utf8p) { |
2586 | if (first_unconverted) { | |
2587 | *first_unconverted = NULL; | |
2588 | } | |
2589 | ||
2590 | return (U8 *) original; | |
2591 | } | |
2592 | ||
2593 | Newx(d, (*lenp) + 1, U8); | |
2594 | ||
2595 | converted_start = d; | |
7299a045 KW |
2596 | while (s < send) { |
2597 | U8 c = *s++; | |
2598 | if (! UTF8_IS_INVARIANT(c)) { | |
976c1b08 KW |
2599 | |
2600 | /* Then it is multi-byte encoded. If the code point is above 0xFF, | |
2601 | * have to stop now */ | |
2602 | if (UNLIKELY (! UTF8_IS_NEXT_CHAR_DOWNGRADEABLE(s - 1, send))) { | |
2603 | if (first_unconverted) { | |
2604 | *first_unconverted = s - 1; | |
2605 | goto finish_and_return; | |
2606 | } | |
2607 | else { | |
2608 | Safefree(converted_start); | |
2609 | return (U8 *) original; | |
2610 | } | |
2611 | } | |
2612 | ||
7299a045 KW |
2613 | c = EIGHT_BIT_UTF8_TO_NATIVE(c, *s); |
2614 | s++; | |
38af28cf | 2615 | } |
7299a045 KW |
2616 | *d++ = c; |
2617 | } | |
170a1c22 | 2618 | |
976c1b08 KW |
2619 | /* Here, converted the whole of the input */ |
2620 | *is_utf8p = FALSE; | |
2621 | if (first_unconverted) { | |
2622 | *first_unconverted = NULL; | |
170a1c22 | 2623 | } |
976c1b08 KW |
2624 | |
2625 | finish_and_return: | |
46a08a6f KW |
2626 | *d = '\0'; |
2627 | *lenp = d - converted_start; | |
976c1b08 KW |
2628 | |
2629 | /* Trim unused space */ | |
2630 | Renew(converted_start, *lenp + 1, U8); | |
2631 | ||
2632 | return converted_start; | |
f9a63242 JH |
2633 | } |
2634 | ||
2635 | /* | |
87cea99e | 2636 | =for apidoc bytes_to_utf8 |
6940069f | 2637 | |
09af0336 | 2638 | Converts a string C<s> of length C<*lenp> bytes from the native encoding into |
ff97e5cf | 2639 | UTF-8. |
09af0336 | 2640 | Returns a pointer to the newly-created string, and sets C<*lenp> to |
9ff99fb3 KW |
2641 | reflect the new length in bytes. The caller is responsible for arranging for |
2642 | the memory used by this string to get freed. | |
6940069f | 2643 | |
3bc0c78c | 2644 | Upon successful return, the number of variants in the string can be computed by |
23b37b12 | 2645 | having saved the value of C<*lenp> before the call, and subtracting it from the |
3bc0c78c KW |
2646 | after-call value of C<*lenp>. |
2647 | ||
75200dff | 2648 | A C<NUL> character will be written after the end of the string. |
2bbc8d55 SP |
2649 | |
2650 | If you want to convert to UTF-8 from encodings other than | |
2651 | the native (Latin1 or EBCDIC), | |
a1433954 | 2652 | see L</sv_recode_to_utf8>(). |
c9ada85f | 2653 | |
497711e7 | 2654 | =cut |
6940069f GS |
2655 | */ |
2656 | ||
2657 | U8* | |
09af0336 | 2658 | Perl_bytes_to_utf8(pTHX_ const U8 *s, STRLEN *lenp) |
6940069f | 2659 | { |
09af0336 | 2660 | const U8 * const send = s + (*lenp); |
6940069f GS |
2661 | U8 *d; |
2662 | U8 *dst; | |
7918f24d NC |
2663 | |
2664 | PERL_ARGS_ASSERT_BYTES_TO_UTF8; | |
96a5add6 | 2665 | PERL_UNUSED_CONTEXT; |
6940069f | 2666 | |
d4662719 KW |
2667 | /* 1 for each byte + 1 for each byte that expands to two, + trailing NUL */ |
2668 | Newx(d, (*lenp) + variant_under_utf8_count(s, send) + 1, U8); | |
6940069f GS |
2669 | dst = d; |
2670 | ||
2671 | while (s < send) { | |
55d09dc8 KW |
2672 | append_utf8_from_native_byte(*s, &d); |
2673 | s++; | |
6940069f | 2674 | } |
2e11cf67 | 2675 | |
6940069f | 2676 | *d = '\0'; |
09af0336 | 2677 | *lenp = d-dst; |
2e11cf67 | 2678 | |
6940069f GS |
2679 | return dst; |
2680 | } | |
2681 | ||
a0ed51b3 | 2682 | /* |
624504c5 KW |
2683 | * Convert native (big-endian) UTF-16 to UTF-8. For reversed (little-endian), |
2684 | * use utf16_to_utf8_reversed(). | |
a0ed51b3 | 2685 | * |
624504c5 KW |
2686 | * UTF-16 requires 2 bytes for every code point below 0x10000; otherwise 4 bytes. |
2687 | * UTF-8 requires 1-3 bytes for every code point below 0x1000; otherwise 4 bytes. | |
2688 | * UTF-EBCDIC requires 1-4 bytes for every code point below 0x1000; otherwise 4-5 bytes. | |
2689 | * | |
2690 | * These functions don't check for overflow. The worst case is every code | |
2691 | * point in the input is 2 bytes, and requires 4 bytes on output. (If the code | |
2692 | * is never going to run in EBCDIC, it is 2 bytes requiring 3 on output.) Therefore the | |
2693 | * destination must be pre-extended to 2 times the source length. | |
2694 | * | |
2695 | * Do not use in-place. We optimize for native, for obvious reasons. */ | |
a0ed51b3 LW |
2696 | |
2697 | U8* | |
dea0fc0b | 2698 | Perl_utf16_to_utf8(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 | 2699 | { |
dea0fc0b JH |
2700 | U8* pend; |
2701 | U8* dstart = d; | |
2702 | ||
7918f24d NC |
2703 | PERL_ARGS_ASSERT_UTF16_TO_UTF8; |
2704 | ||
dea0fc0b | 2705 | if (bytelen & 1) |
56576a04 KW |
2706 | Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen %" UVuf, |
2707 | (UV)bytelen); | |
dea0fc0b JH |
2708 | |
2709 | pend = p + bytelen; | |
2710 | ||
a0ed51b3 | 2711 | while (p < pend) { |
dea0fc0b JH |
2712 | UV uv = (p[0] << 8) + p[1]; /* UTF-16BE */ |
2713 | p += 2; | |
2d1545e5 | 2714 | if (OFFUNI_IS_INVARIANT(uv)) { |
56d37426 | 2715 | *d++ = LATIN1_TO_NATIVE((U8) uv); |
a0ed51b3 LW |
2716 | continue; |
2717 | } | |
56d37426 KW |
2718 | if (uv <= MAX_UTF8_TWO_BYTE) { |
2719 | *d++ = UTF8_TWO_BYTE_HI(UNI_TO_NATIVE(uv)); | |
2720 | *d++ = UTF8_TWO_BYTE_LO(UNI_TO_NATIVE(uv)); | |
a0ed51b3 LW |
2721 | continue; |
2722 | } | |
ffd0a9d3 | 2723 | |
46956fad KW |
2724 | #define FIRST_HIGH_SURROGATE UNICODE_SURROGATE_FIRST |
2725 | #define LAST_HIGH_SURROGATE 0xDBFF | |
2726 | #define FIRST_LOW_SURROGATE 0xDC00 | |
2727 | #define LAST_LOW_SURROGATE UNICODE_SURROGATE_LAST | |
ffd0a9d3 | 2728 | #define FIRST_IN_PLANE1 0x10000 |
e23c50db KW |
2729 | |
2730 | /* This assumes that most uses will be in the first Unicode plane, not | |
2731 | * needing surrogates */ | |
2732 | if (UNLIKELY(uv >= UNICODE_SURROGATE_FIRST | |
2733 | && uv <= UNICODE_SURROGATE_LAST)) | |
2734 | { | |
2735 | if (UNLIKELY(p >= pend) || UNLIKELY(uv > LAST_HIGH_SURROGATE)) { | |
2736 | Perl_croak(aTHX_ "Malformed UTF-16 surrogate"); | |
2737 | } | |
2738 | else { | |
01ea242b | 2739 | UV low = (p[0] << 8) + p[1]; |
e23c50db KW |
2740 | if ( UNLIKELY(low < FIRST_LOW_SURROGATE) |
2741 | || UNLIKELY(low > LAST_LOW_SURROGATE)) | |
2742 | { | |
01ea242b | 2743 | Perl_croak(aTHX_ "Malformed UTF-16 surrogate"); |
e23c50db KW |
2744 | } |
2745 | p += 2; | |
46956fad | 2746 | uv = ((uv - FIRST_HIGH_SURROGATE) << 10) |
ffd0a9d3 | 2747 | + (low - FIRST_LOW_SURROGATE) + FIRST_IN_PLANE1; |
01ea242b | 2748 | } |
a0ed51b3 | 2749 | } |
56d37426 KW |
2750 | #ifdef EBCDIC |
2751 | d = uvoffuni_to_utf8_flags(d, uv, 0); | |
2752 | #else | |
ffd0a9d3 | 2753 | if (uv < FIRST_IN_PLANE1) { |
eb160463 GS |
2754 | *d++ = (U8)(( uv >> 12) | 0xe0); |
2755 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); | |
2756 | *d++ = (U8)(( uv & 0x3f) | 0x80); | |
a0ed51b3 LW |
2757 | continue; |
2758 | } | |
2759 | else { | |
eb160463 GS |
2760 | *d++ = (U8)(( uv >> 18) | 0xf0); |
2761 | *d++ = (U8)(((uv >> 12) & 0x3f) | 0x80); | |
2762 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); | |
2763 | *d++ = (U8)(( uv & 0x3f) | 0x80); | |
a0ed51b3 LW |
2764 | continue; |
2765 | } | |
56d37426 | 2766 | #endif |
a0ed51b3 | 2767 | } |
dea0fc0b | 2768 | *newlen = d - dstart; |
a0ed51b3 LW |
2769 | return d; |
2770 | } | |
2771 | ||
2772 | /* Note: this one is slightly destructive of the source. */ | |
2773 | ||
2774 | U8* | |
dea0fc0b | 2775 | Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 LW |
2776 | { |
2777 | U8* s = (U8*)p; | |
d4c19fe8 | 2778 | U8* const send = s + bytelen; |
7918f24d NC |
2779 | |
2780 | PERL_ARGS_ASSERT_UTF16_TO_UTF8_REVERSED; | |
2781 | ||
e0ea5e2d | 2782 | if (bytelen & 1) |
147e3846 | 2783 | Perl_croak(aTHX_ "panic: utf16_to_utf8_reversed: odd bytelen %" UVuf, |
e0ea5e2d NC |
2784 | (UV)bytelen); |
2785 | ||
a0ed51b3 | 2786 | while (s < send) { |
d4c19fe8 | 2787 | const U8 tmp = s[0]; |
a0ed51b3 LW |
2788 | s[0] = s[1]; |
2789 | s[1] = tmp; | |
2790 | s += 2; | |
2791 | } | |
dea0fc0b | 2792 | return utf16_to_utf8(p, d, bytelen, newlen); |
a0ed51b3 LW |
2793 | } |
2794 | ||
922e8cb4 KW |
2795 | bool |
2796 | Perl__is_uni_FOO(pTHX_ const U8 classnum, const UV c) | |
2797 | { | |
1565c085 | 2798 | dVAR; |
dc31b55c | 2799 | return _invlist_contains_cp(PL_XPosix_ptrs[classnum], c); |
922e8cb4 KW |
2800 | } |
2801 | ||
f9ae8fb6 JD |
2802 | /* Internal function so we can deprecate the external one, and call |
2803 | this one from other deprecated functions in this file */ | |
2804 | ||
f2645549 KW |
2805 | bool |
2806 | Perl__is_utf8_idstart(pTHX_ const U8 *p) | |
61b19385 | 2807 | { |
1565c085 DM |
2808 | dVAR; |
2809 | ||
f2645549 | 2810 | PERL_ARGS_ASSERT__IS_UTF8_IDSTART; |
61b19385 KW |
2811 | |
2812 | if (*p == '_') | |
2813 | return TRUE; | |
eb1f4bb4 | 2814 | return is_utf8_common(p, PL_utf8_idstart); |
61b19385 KW |
2815 | } |
2816 | ||
5092f92a | 2817 | bool |
eba68aa0 KW |
2818 | Perl__is_uni_perl_idcont(pTHX_ UV c) |
2819 | { | |
1565c085 | 2820 | dVAR; |
c12658c9 | 2821 | return _invlist_contains_cp(PL_utf8_perl_idcont, c); |
eba68aa0 KW |
2822 | } |
2823 | ||
2824 | bool | |
f91dcd13 KW |
2825 | Perl__is_uni_perl_idstart(pTHX_ UV c) |
2826 | { | |
1565c085 | 2827 | dVAR; |
c12658c9 | 2828 | return _invlist_contains_cp(PL_utf8_perl_idstart, c); |
f91dcd13 KW |
2829 | } |
2830 | ||
3a4c58c9 | 2831 | UV |
56576a04 KW |
2832 | Perl__to_upper_title_latin1(pTHX_ const U8 c, U8* p, STRLEN *lenp, |
2833 | const char S_or_s) | |
3a4c58c9 KW |
2834 | { |
2835 | /* We have the latin1-range values compiled into the core, so just use | |
4a4088c4 | 2836 | * those, converting the result to UTF-8. The only difference between upper |
3a4c58c9 KW |
2837 | * and title case in this range is that LATIN_SMALL_LETTER_SHARP_S is |
2838 | * either "SS" or "Ss". Which one to use is passed into the routine in | |
2839 | * 'S_or_s' to avoid a test */ | |
2840 | ||
2841 | UV converted = toUPPER_LATIN1_MOD(c); | |
2842 | ||
2843 | PERL_ARGS_ASSERT__TO_UPPER_TITLE_LATIN1; | |
2844 | ||
2845 | assert(S_or_s == 'S' || S_or_s == 's'); | |
2846 | ||
6f2d5cbc | 2847 | if (UVCHR_IS_INVARIANT(converted)) { /* No difference between the two for |
f4cd282c | 2848 | characters in this range */ |
3a4c58c9 KW |
2849 | *p = (U8) converted; |
2850 | *lenp = 1; | |
2851 | return converted; | |
2852 | } | |
2853 | ||
2854 | /* toUPPER_LATIN1_MOD gives the correct results except for three outliers, | |
2855 | * which it maps to one of them, so as to only have to have one check for | |
2856 | * it in the main case */ | |
2857 | if (UNLIKELY(converted == LATIN_SMALL_LETTER_Y_WITH_DIAERESIS)) { | |
2858 | switch (c) { | |
2859 | case LATIN_SMALL_LETTER_Y_WITH_DIAERESIS: | |
2860 | converted = LATIN_CAPITAL_LETTER_Y_WITH_DIAERESIS; | |
2861 | break; | |
2862 | case MICRO_SIGN: | |
2863 | converted = GREEK_CAPITAL_LETTER_MU; | |
2864 | break; | |
79e064b9 KW |
2865 | #if UNICODE_MAJOR_VERSION > 2 \ |
2866 | || (UNICODE_MAJOR_VERSION == 2 && UNICODE_DOT_VERSION >= 1 \ | |
2867 | && UNICODE_DOT_DOT_VERSION >= 8) | |
3a4c58c9 KW |
2868 | case LATIN_SMALL_LETTER_SHARP_S: |
2869 | *(p)++ = 'S'; | |
2870 | *p = S_or_s; | |
2871 | *lenp = 2; | |
2872 | return 'S'; | |
79e064b9 | 2873 | #endif |
3a4c58c9 | 2874 | default: |
56576a04 KW |
2875 | Perl_croak(aTHX_ "panic: to_upper_title_latin1 did not expect" |
2876 | " '%c' to map to '%c'", | |
2877 | c, LATIN_SMALL_LETTER_Y_WITH_DIAERESIS); | |
e5964223 | 2878 | NOT_REACHED; /* NOTREACHED */ |
3a4c58c9 KW |
2879 | } |
2880 | } | |
2881 | ||
2882 | *(p)++ = UTF8_TWO_BYTE_HI(converted); | |
2883 | *p = UTF8_TWO_BYTE_LO(converted); | |
2884 | *lenp = 2; | |
2885 | ||
2886 | return converted; | |
2887 | } | |
2888 | ||
fe63c520 KW |
2889 | /* If compiled on an early Unicode version, there may not be auxiliary tables |
2890 | * */ | |
2891 | #ifndef HAS_UC_AUX_TABLES | |
2892 | # define UC_AUX_TABLE_ptrs NULL | |
2893 | # define UC_AUX_TABLE_lengths NULL | |
2894 | #endif | |
2895 | #ifndef HAS_TC_AUX_TABLES | |
2896 | # define TC_AUX_TABLE_ptrs NULL | |
2897 | # define TC_AUX_TABLE_lengths NULL | |
2898 | #endif | |
2899 | #ifndef HAS_LC_AUX_TABLES | |
2900 | # define LC_AUX_TABLE_ptrs NULL | |
2901 | # define LC_AUX_TABLE_lengths NULL | |
2902 | #endif | |
2903 | #ifndef HAS_CF_AUX_TABLES | |
2904 | # define CF_AUX_TABLE_ptrs NULL | |
2905 | # define CF_AUX_TABLE_lengths NULL | |
2906 | #endif | |
2907 | #ifndef HAS_UC_AUX_TABLES | |
2908 | # define UC_AUX_TABLE_ptrs NULL | |
2909 | # define UC_AUX_TABLE_lengths NULL | |
2910 | #endif | |
2911 | ||
50bda2c3 KW |
2912 | /* Call the function to convert a UTF-8 encoded character to the specified case. |
2913 | * Note that there may be more than one character in the result. | |
6fa2f9bc KW |
2914 | * 's' is a pointer to the first byte of the input character |
2915 | * 'd' will be set to the first byte of the string of changed characters. It | |
50bda2c3 | 2916 | * needs to have space for UTF8_MAXBYTES_CASE+1 bytes |
6fa2f9bc | 2917 | * 'lenp' will be set to the length in bytes of the string of changed characters |
50bda2c3 | 2918 | * |
56576a04 | 2919 | * The functions return the ordinal of the first character in the string of |
6fa2f9bc | 2920 | * 'd' */ |
56576a04 | 2921 | #define CALL_UPPER_CASE(uv, s, d, lenp) \ |
8946fcd9 KW |
2922 | _to_utf8_case(uv, s, d, lenp, PL_utf8_toupper, \ |
2923 | Uppercase_Mapping_invmap, \ | |
2924 | UC_AUX_TABLE_ptrs, \ | |
2925 | UC_AUX_TABLE_lengths, \ | |
2926 | "uppercase") | |
56576a04 | 2927 | #define CALL_TITLE_CASE(uv, s, d, lenp) \ |
8946fcd9 KW |
2928 | _to_utf8_case(uv, s, d, lenp, PL_utf8_totitle, \ |
2929 | Titlecase_Mapping_invmap, \ | |
2930 | TC_AUX_TABLE_ptrs, \ | |
2931 | TC_AUX_TABLE_lengths, \ | |
2932 | "titlecase") | |
56576a04 | 2933 | #define CALL_LOWER_CASE(uv, s, d, lenp) \ |
8946fcd9 KW |
2934 | _to_utf8_case(uv, s, d, lenp, PL_utf8_tolower, \ |
2935 | Lowercase_Mapping_invmap, \ | |
2936 | LC_AUX_TABLE_ptrs, \ | |
2937 | LC_AUX_TABLE_lengths, \ | |
2938 | "lowercase") | |
2939 | ||
50bda2c3 | 2940 | |
b9992569 KW |
2941 | /* This additionally has the input parameter 'specials', which if non-zero will |
2942 | * cause this to use the specials hash for folding (meaning get full case | |
50bda2c3 | 2943 | * folding); otherwise, when zero, this implies a simple case fold */ |
56576a04 | 2944 | #define CALL_FOLD_CASE(uv, s, d, lenp, specials) \ |
8946fcd9 KW |
2945 | (specials) \ |
2946 | ? _to_utf8_case(uv, s, d, lenp, PL_utf8_tofold, \ | |
2947 | Case_Folding_invmap, \ | |
2948 | CF_AUX_TABLE_ptrs, \ | |
2949 | CF_AUX_TABLE_lengths, \ | |
2950 | "foldcase") \ | |
2951 | : _to_utf8_case(uv, s, d, lenp, PL_utf8_tosimplefold, \ | |
2952 | Simple_Case_Folding_invmap, \ | |
2953 | NULL, NULL, \ | |
2954 | "foldcase") | |
c3fd2246 | 2955 | |
84afefe6 JH |
2956 | UV |
2957 | Perl_to_uni_upper(pTHX_ UV c, U8* p, STRLEN *lenp) | |
a0ed51b3 | 2958 | { |
a1433954 KW |
2959 | /* Convert the Unicode character whose ordinal is <c> to its uppercase |
2960 | * version and store that in UTF-8 in <p> and its length in bytes in <lenp>. | |
2961 | * Note that the <p> needs to be at least UTF8_MAXBYTES_CASE+1 bytes since | |
c3fd2246 KW |
2962 | * the changed version may be longer than the original character. |
2963 | * | |
2964 | * The ordinal of the first character of the changed version is returned | |
2965 | * (but note, as explained above, that there may be more.) */ | |
2966 | ||
1565c085 | 2967 | dVAR; |
7918f24d NC |
2968 | PERL_ARGS_ASSERT_TO_UNI_UPPER; |
2969 | ||
3a4c58c9 KW |
2970 | if (c < 256) { |
2971 | return _to_upper_title_latin1((U8) c, p, lenp, 'S'); | |
2972 | } | |
2973 | ||
a13f1de4 | 2974 | return CALL_UPPER_CASE(c, NULL, p, lenp); |
a0ed51b3 LW |
2975 | } |
2976 | ||
84afefe6 JH |
2977 | UV |
2978 | Perl_to_uni_title(pTHX_ UV c, U8* p, STRLEN *lenp) | |
a0ed51b3 | 2979 | { |
1565c085 | 2980 | dVAR; |
7918f24d NC |
2981 | PERL_ARGS_ASSERT_TO_UNI_TITLE; |
2982 | ||
3a4c58c9 KW |
2983 | if (c < 256) { |
2984 | return _to_upper_title_latin1((U8) c, p, lenp, 's'); | |
2985 | } | |
2986 | ||
a13f1de4 | 2987 | return CALL_TITLE_CASE(c, NULL, p, lenp); |
a0ed51b3 LW |
2988 | } |
2989 | ||
afc16117 | 2990 | STATIC U8 |
eaf412bf | 2991 | S_to_lower_latin1(const U8 c, U8* p, STRLEN *lenp, const char dummy) |
afc16117 KW |
2992 | { |
2993 | /* We have the latin1-range values compiled into the core, so just use | |
4a4088c4 | 2994 | * those, converting the result to UTF-8. Since the result is always just |
a1433954 | 2995 | * one character, we allow <p> to be NULL */ |
afc16117 KW |
2996 | |
2997 | U8 converted = toLOWER_LATIN1(c); | |
2998 | ||
eaf412bf KW |
2999 | PERL_UNUSED_ARG(dummy); |
3000 | ||
afc16117 | 3001 | if (p != NULL) { |
6f2d5cbc | 3002 | if (NATIVE_BYTE_IS_INVARIANT(converted)) { |
afc16117 KW |
3003 | *p = converted; |
3004 | *lenp = 1; | |
3005 | } | |
3006 | else { | |
430c9760 KW |
3007 | /* Result is known to always be < 256, so can use the EIGHT_BIT |
3008 | * macros */ | |
3009 | *p = UTF8_EIGHT_BIT_HI(converted); | |
3010 | *(p+1) = UTF8_EIGHT_BIT_LO(converted); | |
afc16117 KW |
3011 | *lenp = 2; |
3012 | } | |
3013 | } | |
3014 | return converted; | |
3015 | } | |
3016 | ||
84afefe6 JH |
3017 | UV |
3018 | Perl_to_uni_lower(pTHX_ UV c, U8* p, STRLEN *lenp) | |
a0ed51b3 | 3019 | { |
1565c085 | 3020 | dVAR; |
7918f24d NC |
3021 | PERL_ARGS_ASSERT_TO_UNI_LOWER; |
3022 | ||
afc16117 | 3023 | if (c < 256) { |
eaf412bf | 3024 | return to_lower_latin1((U8) c, p, lenp, 0 /* 0 is a dummy arg */ ); |
bca00c02 KW |
3025 | } |
3026 | ||
a13f1de4 | 3027 | return CALL_LOWER_CASE(c, NULL, p, lenp); |
a0ed51b3 LW |
3028 | } |
3029 | ||
84afefe6 | 3030 | UV |
7c0ab950 | 3031 | Perl__to_fold_latin1(const U8 c, U8* p, STRLEN *lenp, const unsigned int flags) |
a1dde8de | 3032 | { |
51910141 | 3033 | /* Corresponds to to_lower_latin1(); <flags> bits meanings: |
1ca267a5 | 3034 | * FOLD_FLAGS_NOMIX_ASCII iff non-ASCII to ASCII folds are prohibited |
51910141 | 3035 | * FOLD_FLAGS_FULL iff full folding is to be used; |
1ca267a5 KW |
3036 | * |
3037 | * Not to be used for locale folds | |
51910141 | 3038 | */ |
f673fad4 | 3039 | |
a1dde8de KW |
3040 | UV converted; |
3041 | ||
3042 | PERL_ARGS_ASSERT__TO_FOLD_LATIN1; | |
3043 | ||
1ca267a5 KW |
3044 | assert (! (flags & FOLD_FLAGS_LOCALE)); |
3045 | ||
659a7c2d | 3046 | if (UNLIKELY(c == MICRO_SIGN)) { |
a1dde8de KW |
3047 | converted = GREEK_SMALL_LETTER_MU; |
3048 | } | |
9b63e895 KW |
3049 | #if UNICODE_MAJOR_VERSION > 3 /* no multifolds in early Unicode */ \ |
3050 | || (UNICODE_MAJOR_VERSION == 3 && ( UNICODE_DOT_VERSION > 0) \ | |
3051 | || UNICODE_DOT_DOT_VERSION > 0) | |
659a7c2d KW |
3052 | else if ( (flags & FOLD_FLAGS_FULL) |
3053 | && UNLIKELY(c == LATIN_SMALL_LETTER_SHARP_S)) | |
3054 | { | |
1ca267a5 KW |
3055 | /* If can't cross 127/128 boundary, can't return "ss"; instead return |
3056 | * two U+017F characters, as fc("\df") should eq fc("\x{17f}\x{17f}") | |
3057 | * under those circumstances. */ | |
3058 | if (flags & FOLD_FLAGS_NOMIX_ASCII) { | |
3059 | *lenp = 2 * sizeof(LATIN_SMALL_LETTER_LONG_S_UTF8) - 2; | |
3060 | Copy(LATIN_SMALL_LETTER_LONG_S_UTF8 LATIN_SMALL_LETTER_LONG_S_UTF8, | |
3061 | p, *lenp, U8); | |
3062 | return LATIN_SMALL_LETTER_LONG_S; | |
3063 | } | |
3064 | else { | |
4f489194 KW |
3065 | *(p)++ = 's'; |
3066 | *p = 's'; | |
3067 | *lenp = 2; | |
3068 | return 's'; | |
1ca267a5 | 3069 | } |
a1dde8de | 3070 | } |
9b63e895 | 3071 | #endif |
a1dde8de KW |
3072 | else { /* In this range the fold of all other characters is their lower |
3073 | case */ | |
3074 | converted = toLOWER_LATIN1(c); | |
3075 | } | |
3076 | ||
6f2d5cbc | 3077 | if (UVCHR_IS_INVARIANT(converted)) { |
a1dde8de KW |
3078 | *p = (U8) converted; |
3079 | *lenp = 1; | |
3080 | } | |
3081 | else { | |
3082 | *(p)++ = UTF8_TWO_BYTE_HI(converted); | |
3083 | *p = UTF8_TWO_BYTE_LO(converted); | |
3084 | *lenp = 2; | |
3085 | } | |
3086 | ||
3087 | return converted; | |
3088 | } | |
3089 | ||
3090 | UV | |
31f05a37 | 3091 | Perl__to_uni_fold_flags(pTHX_ UV c, U8* p, STRLEN *lenp, U8 flags) |
84afefe6 | 3092 | { |
4b593389 | 3093 | |
a0270393 KW |
3094 | /* Not currently externally documented, and subject to change |
3095 | * <flags> bits meanings: | |
3096 | * FOLD_FLAGS_FULL iff full folding is to be used; | |
31f05a37 KW |
3097 | * FOLD_FLAGS_LOCALE is set iff the rules from the current underlying |
3098 | * locale are to be used. | |
a0270393 KW |
3099 | * FOLD_FLAGS_NOMIX_ASCII iff non-ASCII to ASCII folds are prohibited |
3100 | */ | |
4b593389 | 3101 | |
1565c085 | 3102 | dVAR; |
36bb2ab6 | 3103 | PERL_ARGS_ASSERT__TO_UNI_FOLD_FLAGS; |
7918f24d | 3104 | |
780fcc9f | 3105 | if (flags & FOLD_FLAGS_LOCALE) { |
b257a28c KW |
3106 | /* Treat a non-Turkic UTF-8 locale as not being in locale at all, |
3107 | * except for potentially warning */ | |
8b7358b9 | 3108 | _CHECK_AND_WARN_PROBLEMATIC_LOCALE; |
b257a28c | 3109 | if (IN_UTF8_CTYPE_LOCALE && ! PL_in_utf8_turkic_locale) { |
780fcc9f KW |
3110 | flags &= ~FOLD_FLAGS_LOCALE; |
3111 | } | |
3112 | else { | |
e7b7ac46 | 3113 | goto needs_full_generality; |
780fcc9f | 3114 | } |
31f05a37 KW |
3115 | } |
3116 | ||
a1dde8de | 3117 | if (c < 256) { |
e7b7ac46 | 3118 | return _to_fold_latin1((U8) c, p, lenp, |
31f05a37 | 3119 | flags & (FOLD_FLAGS_FULL | FOLD_FLAGS_NOMIX_ASCII)); |
a1dde8de KW |
3120 | } |
3121 | ||
2f306ab9 | 3122 | /* Here, above 255. If no special needs, just use the macro */ |
a0270393 | 3123 | if ( ! (flags & (FOLD_FLAGS_LOCALE|FOLD_FLAGS_NOMIX_ASCII))) { |
a13f1de4 | 3124 | return CALL_FOLD_CASE(c, NULL, p, lenp, flags & FOLD_FLAGS_FULL); |
a0270393 | 3125 | } |
567b353c | 3126 | else { /* Otherwise, _toFOLD_utf8_flags has the intelligence to deal with |
a0270393 KW |
3127 | the special flags. */ |
3128 | U8 utf8_c[UTF8_MAXBYTES + 1]; | |
e7b7ac46 KW |
3129 | |
3130 | needs_full_generality: | |
a0270393 | 3131 | uvchr_to_utf8(utf8_c, c); |
56576a04 KW |
3132 | return _toFOLD_utf8_flags(utf8_c, utf8_c + sizeof(utf8_c), |
3133 | p, lenp, flags); | |
a0270393 | 3134 | } |
84afefe6 JH |
3135 | } |
3136 | ||
26483009 | 3137 | PERL_STATIC_INLINE bool |
eb1f4bb4 | 3138 | S_is_utf8_common(pTHX_ const U8 *const p, SV* const invlist) |
bde6a22d | 3139 | { |
ea317ccb | 3140 | /* returns a boolean giving whether or not the UTF8-encoded character that |
eb1f4bb4 | 3141 | * starts at <p> is in the inversion list indicated by <invlist>. |
ea317ccb KW |
3142 | * |
3143 | * Note that it is assumed that the buffer length of <p> is enough to | |
3144 | * contain all the bytes that comprise the character. Thus, <*p> should | |
3145 | * have been checked before this call for mal-formedness enough to assure | |
016c8ffc KW |
3146 | * that. This function, does make sure to not look past any NUL, so it is |
3147 | * safe to use on C, NUL-terminated, strings */ | |
3148 | STRLEN len = my_strnlen((char *) p, UTF8SKIP(p)); | |
ea317ccb | 3149 | |
7918f24d NC |
3150 | PERL_ARGS_ASSERT_IS_UTF8_COMMON; |
3151 | ||
492a624f | 3152 | /* The API should have included a length for the UTF-8 character in <p>, |
28123549 | 3153 | * but it doesn't. We therefore assume that p has been validated at least |
492a624f KW |
3154 | * as far as there being enough bytes available in it to accommodate the |
3155 | * character without reading beyond the end, and pass that number on to the | |
3156 | * validating routine */ | |
016c8ffc KW |
3157 | if (! isUTF8_CHAR(p, p + len)) { |
3158 | _force_out_malformed_utf8_message(p, p + len, _UTF8_NO_CONFIDENCE_IN_CURLEN, | |
86ae6e94 KW |
3159 | 1 /* Die */ ); |
3160 | NOT_REACHED; /* NOTREACHED */ | |
28123549 | 3161 | } |
86ae6e94 | 3162 | |
eb1f4bb4 | 3163 | return is_utf8_common_with_len(p, p + len, invlist); |
bde6a22d NC |
3164 | } |
3165 | ||
da8c1a98 | 3166 | PERL_STATIC_INLINE bool |
56576a04 | 3167 | S_is_utf8_common_with_len(pTHX_ const U8 *const p, const U8 * const e, |
56576a04 | 3168 | SV* const invlist) |
da8c1a98 KW |
3169 | { |
3170 | /* returns a boolean giving whether or not the UTF8-encoded character that | |
eb1f4bb4 KW |
3171 | * starts at <p>, and extending no further than <e - 1> is in the inversion |
3172 | * list <invlist>. */ | |
da8c1a98 | 3173 | |
b68ffe0c KW |
3174 | UV cp = utf8n_to_uvchr(p, e - p, NULL, 0); |
3175 | ||
da8c1a98 KW |
3176 | PERL_ARGS_ASSERT_IS_UTF8_COMMON_WITH_LEN; |
3177 | ||
b68ffe0c | 3178 | if (cp == 0 && (p >= e || *p != '\0')) { |
da8c1a98 KW |
3179 | _force_out_malformed_utf8_message(p, e, 0, 1); |
3180 | NOT_REACHED; /* NOTREACHED */ | |
3181 | } | |
3182 | ||
eb1f4bb4 | 3183 | assert(invlist); |
b68ffe0c | 3184 | return _invlist_contains_cp(invlist, cp); |
da8c1a98 KW |
3185 | } |
3186 | ||
34aeb2e9 KW |
3187 | STATIC void |
3188 | S_warn_on_first_deprecated_use(pTHX_ const char * const name, | |
3189 | const char * const alternative, | |
3190 | const bool use_locale, | |
3191 | const char * const file, | |
3192 | const unsigned line) | |
3193 | { | |
3194 | const char * key; | |
3195 | ||
3196 | PERL_ARGS_ASSERT_WARN_ON_FIRST_DEPRECATED_USE; | |
3197 | ||
3198 | if (ckWARN_d(WARN_DEPRECATED)) { | |
3199 | ||
3200 | key = Perl_form(aTHX_ "%s;%d;%s;%d", name, use_locale, file, line); | |
3201 | if (! hv_fetch(PL_seen_deprecated_macro, key, strlen(key), 0)) { | |
3202 | if (! PL_seen_deprecated_macro) { | |
3203 | PL_seen_deprecated_macro = newHV(); | |
3204 | } | |
3205 | if (! hv_store(PL_seen_deprecated_macro, key, | |
3206 | strlen(key), &PL_sv_undef, 0)) | |
3207 | { | |
3208 | Perl_croak(aTHX_ "panic: hv_store() unexpectedly failed"); | |
3209 | } | |
3210 | ||
c44e9413 | 3211 | if (instr(file, "mathoms.c")) { |
607313a1 | 3212 | Perl_warner(aTHX_ WARN_DEPRECATED, |
5203d63d | 3213 | "In %s, line %d, starting in Perl v5.32, %s()" |
607313a1 KW |
3214 | " will be removed. Avoid this message by" |
3215 | " converting to use %s().\n", | |
3216 | file, line, name, alternative); | |
3217 | } | |
3218 | else { | |
34aeb2e9 | 3219 | Perl_warner(aTHX_ WARN_DEPRECATED, |
5203d63d | 3220 | "In %s, line %d, starting in Perl v5.32, %s() will" |
34aeb2e9 KW |
3221 | " require an additional parameter. Avoid this" |
3222 | " message by converting to use %s().\n", | |
3223 | file, line, name, alternative); | |
607313a1 | 3224 | } |
34aeb2e9 KW |
3225 | } |
3226 | } | |
3227 | } | |
3228 | ||
bde6a22d | 3229 | bool |
34aeb2e9 | 3230 | Perl__is_utf8_FOO(pTHX_ U8 classnum, |
be99e2c2 | 3231 | const U8 * const p, |
34aeb2e9 KW |
3232 | const char * const name, |
3233 | const char * const alternative, | |
3234 | const bool use_utf8, | |
3235 | const bool use_locale, | |
3236 | const char * const file, | |
3237 | const unsigned line) | |
922e8cb4 | 3238 | { |
1565c085 | 3239 | dVAR; |
922e8cb4 KW |
3240 | PERL_ARGS_ASSERT__IS_UTF8_FOO; |
3241 | ||
34aeb2e9 KW |
3242 | warn_on_first_deprecated_use(name, alternative, use_locale, file, line); |
3243 | ||
3244 | if (use_utf8 && UTF8_IS_ABOVE_LATIN1(*p)) { | |
34aeb2e9 KW |
3245 | |
3246 | switch (classnum) { | |
3247 | case _CC_WORDCHAR: | |
3248 | case _CC_DIGIT: | |
3249 | case _CC_ALPHA: | |
3250 | case _CC_LOWER: | |
3251 | case _CC_UPPER: | |
3252 | case _CC_PUNCT: | |
3253 | case _CC_PRINT: | |
3254 | case _CC_ALPHANUMERIC: | |
3255 | case _CC_GRAPH: | |
3256 | case _CC_CASED: | |
3257 | ||
eb1f4bb4 | 3258 | return is_utf8_common(p, PL_XPosix_ptrs[classnum]); |
34aeb2e9 KW |
3259 | |
3260 | case _CC_SPACE: | |
3261 | return is_XPERLSPACE_high(p); | |
3262 | case _CC_BLANK: | |
3263 | return is_HORIZWS_high(p); | |
3264 | case _CC_XDIGIT: | |
3265 | return is_XDIGIT_high(p); | |
3266 | case _CC_CNTRL: | |
3267 | return 0; | |
3268 | case _CC_ASCII: | |
3269 | return 0; | |
3270 | case _CC_VERTSPACE: | |
3271 | return is_VERTWS_high(p); | |
3272 | case _CC_IDFIRST: | |
eb1f4bb4 | 3273 | return is_utf8_common(p, PL_utf8_perl_idstart); |
34aeb2e9 | 3274 | case _CC_IDCONT: |
eb1f4bb4 | 3275 | return is_utf8_common(p, PL_utf8_perl_idcont); |
34aeb2e9 KW |
3276 | } |
3277 | } | |
3278 | ||
3279 | /* idcont is the same as wordchar below 256 */ | |
3280 | if (classnum == _CC_IDCONT) { | |
3281 | classnum = _CC_WORDCHAR; | |
3282 | } | |
3283 | else if (classnum == _CC_IDFIRST) { | |
3284 | if (*p == '_') { | |
3285 | return TRUE; | |
3286 | } | |
3287 | classnum = _CC_ALPHA; | |
3288 | } | |
3289 | ||
3290 | if (! use_locale) { | |
3291 | if (! use_utf8 || UTF8_IS_INVARIANT(*p)) { | |
3292 | return _generic_isCC(*p, classnum); | |
3293 | } | |
922e8cb4 | 3294 | |
34aeb2e9 KW |
3295 | return _generic_isCC(EIGHT_BIT_UTF8_TO_NATIVE(*p, *(p + 1 )), classnum); |
3296 | } | |
3297 | else { | |
3298 | if (! use_utf8 || UTF8_IS_INVARIANT(*p)) { | |
3299 | return isFOO_lc(classnum, *p); | |
3300 | } | |
3301 | ||
3302 | return isFOO_lc(classnum, EIGHT_BIT_UTF8_TO_NATIVE(*p, *(p + 1 ))); | |
3303 | } | |
3304 | ||
3305 | NOT_REACHED; /* NOTREACHED */ | |
922e8cb4 KW |
3306 | } |
3307 | ||
3308 | bool | |
da8c1a98 KW |
3309 | Perl__is_utf8_FOO_with_len(pTHX_ const U8 classnum, const U8 *p, |
3310 | const U8 * const e) | |
3311 | { | |
1565c085 | 3312 | dVAR; |
da8c1a98 KW |
3313 | PERL_ARGS_ASSERT__IS_UTF8_FOO_WITH_LEN; |
3314 | ||
eb1f4bb4 | 3315 | return is_utf8_common_with_len(p, e, PL_XPosix_ptrs[classnum]); |
da8c1a98 KW |
3316 | } |
3317 | ||
3318 | bool | |
da8c1a98 KW |
3319 | Perl__is_utf8_perl_idstart_with_len(pTHX_ const U8 *p, const U8 * const e) |
3320 | { | |
1565c085 | 3321 | dVAR; |
da8c1a98 KW |
3322 | PERL_ARGS_ASSERT__IS_UTF8_PERL_IDSTART_WITH_LEN; |
3323 | ||
eb1f4bb4 | 3324 | return is_utf8_common_with_len(p, e, PL_utf8_perl_idstart); |
da8c1a98 KW |
3325 | } |
3326 | ||
3327 | bool | |
f2645549 | 3328 | Perl__is_utf8_xidstart(pTHX_ const U8 *p) |
c11ff943 | 3329 | { |
1565c085 | 3330 | dVAR; |
f2645549 | 3331 | PERL_ARGS_ASSERT__IS_UTF8_XIDSTART; |
c11ff943 KW |
3332 | |
3333 | if (*p == '_') | |
3334 | return TRUE; | |
eb1f4bb4 | 3335 | return is_utf8_common(p, PL_utf8_xidstart); |
c11ff943 KW |
3336 | } |
3337 | ||
3338 | bool | |
da8c1a98 KW |
3339 | Perl__is_utf8_perl_idcont_with_len(pTHX_ const U8 *p, const U8 * const e) |
3340 | { | |
1565c085 | 3341 | dVAR; |
da8c1a98 KW |
3342 | PERL_ARGS_ASSERT__IS_UTF8_PERL_IDCONT_WITH_LEN; |
3343 | ||
eb1f4bb4 | 3344 | return is_utf8_common_with_len(p, e, PL_utf8_perl_idcont); |
da8c1a98 KW |
3345 | } |
3346 | ||
3347 | bool | |
f2645549 | 3348 | Perl__is_utf8_idcont(pTHX_ const U8 *p) |
82686b01 | 3349 | { |
1565c085 | 3350 | dVAR; |
f2645549 | 3351 | PERL_ARGS_ASSERT__IS_UTF8_IDCONT; |
7918f24d | 3352 | |
eb1f4bb4 | 3353 | return is_utf8_common(p, PL_utf8_idcont); |
a0ed51b3 LW |
3354 | } |
3355 | ||
3356 | bool | |
f2645549 | 3357 | Perl__is_utf8_xidcont(pTHX_ const U8 *p) |
c11ff943 | 3358 | { |
1565c085 | 3359 | dVAR; |
f2645549 | 3360 | PERL_ARGS_ASSERT__IS_UTF8_XIDCONT; |
c11ff943 | 3361 | |
eb1f4bb4 | 3362 | return is_utf8_common(p, PL_utf8_xidcont); |
c11ff943 KW |
3363 | } |
3364 | ||
3365 | bool | |
7dbf68d2 KW |
3366 | Perl__is_utf8_mark(pTHX_ const U8 *p) |
3367 | { | |
1565c085 | 3368 | dVAR; |
7dbf68d2 KW |
3369 | PERL_ARGS_ASSERT__IS_UTF8_MARK; |
3370 | ||
eb1f4bb4 | 3371 | return is_utf8_common(p, PL_utf8_mark); |
7dbf68d2 KW |
3372 | } |
3373 | ||
6a4a25f4 | 3374 | STATIC UV |
30613bdc KW |
3375 | S__to_utf8_case(pTHX_ const UV uv1, const U8 *p, |
3376 | U8* ustrp, STRLEN *lenp, | |
341bb5b7 | 3377 | SV *invlist, const int * const invmap, |
e39a4130 | 3378 | const unsigned int * const * const aux_tables, |
30613bdc KW |
3379 | const U8 * const aux_table_lengths, |
3380 | const char * const normal) | |
b9992569 | 3381 | { |
0134edef | 3382 | STRLEN len = 0; |
7918f24d | 3383 | |
30613bdc KW |
3384 | /* Change the case of code point 'uv1' whose UTF-8 representation (assumed |
3385 | * by this routine to be valid) begins at 'p'. 'normal' is a string to use | |
3386 | * to name the new case in any generated messages, as a fallback if the | |
3387 | * operation being used is not available. The new case is given by the | |
3388 | * data structures in the remaining arguments. | |
3389 | * | |
3390 | * On return 'ustrp' points to '*lenp' UTF-8 encoded bytes representing the | |
3391 | * entire changed case string, and the return value is the first code point | |
3392 | * in that string */ | |
3393 | ||
b9992569 | 3394 | PERL_ARGS_ASSERT__TO_UTF8_CASE; |
7918f24d | 3395 | |
36eaa811 KW |
3396 | /* For code points that don't change case, we already know that the output |
3397 | * of this function is the unchanged input, so we can skip doing look-ups | |
3398 | * for them. Unfortunately the case-changing code points are scattered | |
3399 | * around. But there are some long consecutive ranges where there are no | |
3400 | * case changing code points. By adding tests, we can eliminate the lookup | |
3401 | * for all the ones in such ranges. This is currently done here only for | |
3402 | * just a few cases where the scripts are in common use in modern commerce | |
3403 | * (and scripts adjacent to those which can be included without additional | |
3404 | * tests). */ | |
3405 | ||
3406 | if (uv1 >= 0x0590) { | |
3407 | /* This keeps from needing further processing the code points most | |
3408 | * likely to be used in the following non-cased scripts: Hebrew, | |
3409 | * Arabic, Syriac, Thaana, NKo, Samaritan, Mandaic, Devanagari, | |
3410 | * Bengali, Gurmukhi, Gujarati, Oriya, Tamil, Telugu, Kannada, | |
3411 | * Malayalam, Sinhala, Thai, Lao, Tibetan, Myanmar */ | |
3412 | if (uv1 < 0x10A0) { | |
3413 | goto cases_to_self; | |
3414 | } | |
3415 | ||
3416 | /* The following largish code point ranges also don't have case | |
3417 | * changes, but khw didn't think they warranted extra tests to speed | |
3418 | * them up (which would slightly slow down everything else above them): | |
3419 | * 1100..139F Hangul Jamo, Ethiopic | |
3420 | * 1400..1CFF Unified Canadian Aboriginal Syllabics, Ogham, Runic, | |
3421 | * Tagalog, Hanunoo, Buhid, Tagbanwa, Khmer, Mongolian, | |
3422 | * Limbu, Tai Le, New Tai Lue, Buginese, Tai Tham, | |
3423 | * Combining Diacritical Marks Extended, Balinese, | |
3424 | * Sundanese, Batak, Lepcha, Ol Chiki | |
3425 | * 2000..206F General Punctuation | |
3426 | */ | |
3427 | ||
3428 | if (uv1 >= 0x2D30) { | |
3429 | ||
3430 | /* This keeps the from needing further processing the code points | |
3431 | * most likely to be used in the following non-cased major scripts: | |
3432 | * CJK, Katakana, Hiragana, plus some less-likely scripts. | |
3433 | * | |
3434 | * (0x2D30 above might have to be changed to 2F00 in the unlikely | |
3435 | * event that Unicode eventually allocates the unused block as of | |
3436 | * v8.0 2FE0..2FEF to code points that are cased. khw has verified | |
3437 | * that the test suite will start having failures to alert you | |
3438 | * should that happen) */ | |
3439 | if (uv1 < 0xA640) { | |
3440 | goto cases_to_self; | |
3441 | } | |
3442 | ||
3443 | if (uv1 >= 0xAC00) { | |
3444 | if (UNLIKELY(UNICODE_IS_SURROGATE(uv1))) { | |
5af9bc97 KW |
3445 | if (ckWARN_d(WARN_SURROGATE)) { |
3446 | const char* desc = (PL_op) ? OP_DESC(PL_op) : normal; | |
3447 | Perl_warner(aTHX_ packWARN(WARN_SURROGATE), | |
56576a04 KW |
3448 | "Operation \"%s\" returns its argument for" |
3449 | " UTF-16 surrogate U+%04" UVXf, desc, uv1); | |
5af9bc97 KW |
3450 | } |
3451 | goto cases_to_self; | |
3452 | } | |
36eaa811 KW |
3453 | |
3454 | /* AC00..FAFF Catches Hangul syllables and private use, plus | |
3455 | * some others */ | |
3456 | if (uv1 < 0xFB00) { | |
3457 | goto cases_to_self; | |
36eaa811 KW |
3458 | } |
3459 | ||
5af9bc97 | 3460 | if (UNLIKELY(UNICODE_IS_SUPER(uv1))) { |
40606899 | 3461 | if (UNLIKELY(uv1 > MAX_LEGAL_CP)) { |
d22ec717 | 3462 | Perl_croak(aTHX_ cp_above_legal_max, uv1, |
40606899 | 3463 | MAX_LEGAL_CP); |
5af9bc97 KW |
3464 | } |
3465 | if (ckWARN_d(WARN_NON_UNICODE)) { | |
3466 | const char* desc = (PL_op) ? OP_DESC(PL_op) : normal; | |
3467 | Perl_warner(aTHX_ packWARN(WARN_NON_UNICODE), | |
56576a04 KW |
3468 | "Operation \"%s\" returns its argument for" |
3469 | " non-Unicode code point 0x%04" UVXf, desc, uv1); | |
5af9bc97 KW |
3470 | } |
3471 | goto cases_to_self; | |
3472 | } | |
3bfc1e70 KW |
3473 | #ifdef HIGHEST_CASE_CHANGING_CP_FOR_USE_ONLY_BY_UTF8_DOT_C |
3474 | if (UNLIKELY(uv1 | |
3475 | > HIGHEST_CASE_CHANGING_CP_FOR_USE_ONLY_BY_UTF8_DOT_C)) | |
3476 | { | |
3477 | ||
56576a04 KW |
3478 | /* As of Unicode 10.0, this means we avoid swash creation |
3479 | * for anything beyond high Plane 1 (below emojis) */ | |
3bfc1e70 KW |
3480 | goto cases_to_self; |
3481 | } | |
3482 | #endif | |
36eaa811 KW |
3483 | } |
3484 | } | |
9ae3ac1a | 3485 | |
36eaa811 | 3486 | /* Note that non-characters are perfectly legal, so no warning should |
8946fcd9 | 3487 | * be given. */ |
9ae3ac1a KW |
3488 | } |
3489 | ||
8946fcd9 KW |
3490 | { |
3491 | unsigned int i; | |
e39a4130 | 3492 | const unsigned int * cp_list; |
8946fcd9 | 3493 | U8 * d; |
69352d88 KW |
3494 | |
3495 | /* 'index' is guaranteed to be non-negative, as this is an inversion | |
3496 | * map that covers all possible inputs. See [perl #133365] */ | |
8946fcd9 KW |
3497 | SSize_t index = _invlist_search(invlist, uv1); |
3498 | IV base = invmap[index]; | |
0134edef | 3499 | |
30613bdc KW |
3500 | /* The data structures are set up so that if 'base' is non-negative, |
3501 | * the case change is 1-to-1; and if 0, the change is to itself */ | |
8946fcd9 KW |
3502 | if (base >= 0) { |
3503 | IV lc; | |
b08cf34e | 3504 | |
8946fcd9 KW |
3505 | if (base == 0) { |
3506 | goto cases_to_self; | |
4a8240a3 | 3507 | } |
4a8240a3 | 3508 | |
30613bdc | 3509 | /* This computes, e.g. lc(H) as 'H - A + a', using the lc table */ |
8946fcd9 KW |
3510 | lc = base + uv1 - invlist_array(invlist)[index]; |
3511 | *lenp = uvchr_to_utf8(ustrp, lc) - ustrp; | |
3512 | return lc; | |
3513 | } | |
1feea2c7 | 3514 | |
30613bdc KW |
3515 | /* Here 'base' is negative. That means the mapping is 1-to-many, and |
3516 | * requires an auxiliary table look up. abs(base) gives the index into | |
3517 | * a list of such tables which points to the proper aux table. And a | |
3518 | * parallel list gives the length of each corresponding aux table. */ | |
8946fcd9 | 3519 | cp_list = aux_tables[-base]; |
30613bdc KW |
3520 | |
3521 | /* Create the string of UTF-8 from the mapped-to code points */ | |
8946fcd9 KW |
3522 | d = ustrp; |
3523 | for (i = 0; i < aux_table_lengths[-base]; i++) { | |
3524 | d = uvchr_to_utf8(d, cp_list[i]); | |
cbe07460 | 3525 | } |
8946fcd9 KW |
3526 | *d = '\0'; |
3527 | *lenp = d - ustrp; | |
3528 | ||
3529 | return cp_list[0]; | |
cbe07460 KW |
3530 | } |
3531 | ||
3532 | /* Here, there was no mapping defined, which means that the code point maps | |
3533 | * to itself. Return the inputs */ | |
e24dfe9c | 3534 | cases_to_self: |
a13f1de4 KW |
3535 | if (p) { |
3536 | len = UTF8SKIP(p); | |
3537 | if (p != ustrp) { /* Don't copy onto itself */ | |
3538 | Copy(p, ustrp, len, U8); | |
3539 | } | |
3540 | *lenp = len; | |
3541 | } | |
3542 | else { | |
3543 | *lenp = uvchr_to_utf8(ustrp, uv1) - ustrp; | |
ca9fab46 | 3544 | } |
2a37f04d | 3545 | |
f4cd282c | 3546 | return uv1; |
cbe07460 | 3547 | |
a0ed51b3 LW |
3548 | } |
3549 | ||
b74fe592 | 3550 | Size_t |
e39a4130 KW |
3551 | Perl__inverse_folds(pTHX_ const UV cp, unsigned int * first_folds_to, |
3552 | const unsigned int ** remaining_folds_to) | |
b74fe592 KW |
3553 | { |
3554 | /* Returns the count of the number of code points that fold to the input | |
3555 | * 'cp' (besides itself). | |
3556 | * | |
3557 | * If the return is 0, there is nothing else that folds to it, and | |
3558 | * '*first_folds_to' is set to 0, and '*remaining_folds_to' is set to NULL. | |
3559 | * | |
3560 | * If the return is 1, '*first_folds_to' is set to the single code point, | |
3561 | * and '*remaining_folds_to' is set to NULL. | |
3562 | * | |
3563 | * Otherwise, '*first_folds_to' is set to a code point, and | |
3564 | * '*remaining_fold_to' is set to an array that contains the others. The | |
3565 | * length of this array is the returned count minus 1. | |
3566 | * | |
3567 | * The reason for this convolution is to avoid having to deal with | |
3568 | * allocating and freeing memory. The lists are already constructed, so | |
3569 | * the return can point to them, but single code points aren't, so would | |
3570 | * need to be constructed if we didn't employ something like this API */ | |
3571 | ||
1565c085 | 3572 | dVAR; |
69352d88 KW |
3573 | /* 'index' is guaranteed to be non-negative, as this is an inversion map |
3574 | * that covers all possible inputs. See [perl #133365] */ | |
b74fe592 KW |
3575 | SSize_t index = _invlist_search(PL_utf8_foldclosures, cp); |
3576 | int base = _Perl_IVCF_invmap[index]; | |
3577 | ||
3578 | PERL_ARGS_ASSERT__INVERSE_FOLDS; | |
3579 | ||
3580 | if (base == 0) { /* No fold */ | |
3581 | *first_folds_to = 0; | |
3582 | *remaining_folds_to = NULL; | |
3583 | return 0; | |
3584 | } | |
3585 | ||
3586 | #ifndef HAS_IVCF_AUX_TABLES /* This Unicode version only has 1-1 folds */ | |
3587 | ||
3588 | assert(base > 0); | |
3589 | ||
3590 | #else | |
3591 | ||
3592 | if (UNLIKELY(base < 0)) { /* Folds to more than one character */ | |
3593 | ||
3594 | /* The data structure is set up so that the absolute value of 'base' is | |
3595 | * an index into a table of pointers to arrays, with the array | |
3596 | * corresponding to the index being the list of code points that fold | |
3597 | * to 'cp', and the parallel array containing the length of the list | |
3598 | * array */ | |
3599 | *first_folds_to = IVCF_AUX_TABLE_ptrs[-base][0]; | |
3600 | *remaining_folds_to = IVCF_AUX_TABLE_ptrs[-base] + 1; /* +1 excludes | |
3601 | *first_folds_to | |
3602 | */ | |
3603 | return IVCF_AUX_TABLE_lengths[-base]; | |
3604 | } | |
3605 | ||
3606 | #endif | |
3607 | ||
3608 | /* Only the single code point. This works like 'fc(G) = G - A + a' */ | |
3609 | *first_folds_to = base + cp - invlist_array(PL_utf8_foldclosures)[index]; | |
3610 | *remaining_folds_to = NULL; | |
3611 | return 1; | |
3612 | } | |
3613 | ||
051a06d4 | 3614 | STATIC UV |
56576a04 KW |
3615 | S_check_locale_boundary_crossing(pTHX_ const U8* const p, const UV result, |
3616 | U8* const ustrp, STRLEN *lenp) | |
051a06d4 | 3617 | { |
4a4088c4 | 3618 | /* This is called when changing the case of a UTF-8-encoded character above |
31f05a37 KW |
3619 | * the Latin1 range, and the operation is in a non-UTF-8 locale. If the |
3620 | * result contains a character that crosses the 255/256 boundary, disallow | |
3621 | * the change, and return the original code point. See L<perlfunc/lc> for | |
3622 | * why; | |
051a06d4 | 3623 | * |
a1433954 KW |
3624 | * p points to the original string whose case was changed; assumed |
3625 | * by this routine to be well-formed | |
051a06d4 | 3626 | * result the code point of the first character in the changed-case string |
56576a04 KW |
3627 | * ustrp points to the changed-case string (<result> represents its |
3628 | * first char) | |
051a06d4 KW |
3629 | * lenp points to the length of <ustrp> */ |
3630 | ||
3631 | UV original; /* To store the first code point of <p> */ | |
3632 | ||
3633 | PERL_ARGS_ASSERT_CHECK_LOCALE_BOUNDARY_CROSSING; | |
3634 | ||
a4f12ed7 | 3635 | assert(UTF8_IS_ABOVE_LATIN1(*p)); |
051a06d4 KW |
3636 | |
3637 | /* We know immediately if the first character in the string crosses the | |
5e45c680 | 3638 | * boundary, so can skip testing */ |
051a06d4 KW |
3639 | if (result > 255) { |
3640 | ||
3641 | /* Look at every character in the result; if any cross the | |
3642 | * boundary, the whole thing is disallowed */ | |
3643 | U8* s = ustrp + UTF8SKIP(ustrp); | |
3644 | U8* e = ustrp + *lenp; | |
3645 | while (s < e) { | |
a4f12ed7 | 3646 | if (! UTF8_IS_ABOVE_LATIN1(*s)) { |
051a06d4 KW |
3647 | goto bad_crossing; |
3648 | } | |
3649 | s += UTF8SKIP(s); | |
3650 | } | |
3651 | ||
613abc6d KW |
3652 | /* Here, no characters crossed, result is ok as-is, but we warn. */ |
3653 | _CHECK_AND_OUTPUT_WIDE_LOCALE_UTF8_MSG(p, p + UTF8SKIP(p)); | |
051a06d4 KW |
3654 | return result; |
3655 | } | |
3656 | ||
7b52d656 | 3657 | bad_crossing: |
051a06d4 KW |
3658 | |
3659 | /* Failed, have to return the original */ | |
4b88fb76 | 3660 | original = valid_utf8_to_uvchr(p, lenp); |
ab0b796c KW |
3661 | |
3662 | /* diag_listed_as: Can't do %s("%s") on non-UTF-8 locale; resolved to "%s". */ | |
3663 | Perl_ck_warner(aTHX_ packWARN(WARN_LOCALE), | |
56576a04 KW |
3664 | "Can't do %s(\"\\x{%" UVXf "}\") on non-UTF-8" |
3665 | " locale; resolved to \"\\x{%" UVXf "}\".", | |
357aadde | 3666 | OP_DESC(PL_op), |
ab0b796c KW |
3667 | original, |
3668 | original); | |
051a06d4 KW |
3669 | Copy(p, ustrp, *lenp, char); |
3670 | return original; | |
3671 | } | |
3672 | ||
607313a1 KW |
3673 | STATIC U32 |
3674 | S_check_and_deprecate(pTHX_ const U8 *p, | |
3675 | const U8 **e, | |
3676 | const unsigned int type, /* See below */ | |
3677 | const bool use_locale, /* Is this a 'LC_' | |
3678 | macro call? */ | |
3679 | const char * const file, | |
3680 | const unsigned line) | |
3681 | { | |
3682 | /* This is a temporary function to deprecate the unsafe calls to the case | |
3683 | * changing macros and functions. It keeps all the special stuff in just | |
3684 | * one place. | |
3685 | * | |
3686 | * It updates *e with the pointer to the end of the input string. If using | |
3687 | * the old-style macros, *e is NULL on input, and so this function assumes | |
3688 | * the input string is long enough to hold the entire UTF-8 sequence, and | |
3689 | * sets *e accordingly, but it then returns a flag to pass the | |
3690 | * utf8n_to_uvchr(), to tell it that this size is a guess, and to avoid | |
3691 | * using the full length if possible. | |
3692 | * | |
3693 | * It also does the assert that *e > p when *e is not NULL. This should be | |
3694 | * migrated to the callers when this function gets deleted. | |
3695 | * | |
3696 | * The 'type' parameter is used for the caller to specify which case | |
3697 | * changing function this is called from: */ | |
3698 | ||
3699 | # define DEPRECATE_TO_UPPER 0 | |
3700 | # define DEPRECATE_TO_TITLE 1 | |
3701 | # define DEPRECATE_TO_LOWER 2 | |
3702 | # define DEPRECATE_TO_FOLD 3 | |
3703 | ||
3704 | U32 utf8n_flags = 0; | |
3705 | const char * name; | |
3706 | const char * alternative; | |
3707 | ||
3708 | PERL_ARGS_ASSERT_CHECK_AND_DEPRECATE; | |
3709 | ||
3710 | if (*e == NULL) { | |
3711 | utf8n_flags = _UTF8_NO_CONFIDENCE_IN_CURLEN; | |
6f7ce6e8 KW |
3712 | |
3713 | /* strnlen() makes this function safe for the common case of | |
3714 | * NUL-terminated strings */ | |
3715 | *e = p + my_strnlen((char *) p, UTF8SKIP(p)); | |
607313a1 KW |
3716 | |
3717 | /* For mathoms.c calls, we use the function name we know is stored | |
c44e9413 | 3718 | * there. It could be part of a larger path */ |
607313a1 | 3719 | if (type == DEPRECATE_TO_UPPER) { |
c44e9413 | 3720 | name = instr(file, "mathoms.c") |
607313a1 KW |
3721 | ? "to_utf8_upper" |
3722 | : "toUPPER_utf8"; | |
3723 | alternative = "toUPPER_utf8_safe"; | |
3724 | } | |
3725 | else if (type == DEPRECATE_TO_TITLE) { | |
c44e9413 | 3726 | name = instr(file, "mathoms.c") |
607313a1 KW |
3727 | ? "to_utf8_title" |
3728 | : "toTITLE_utf8"; | |
3729 | alternative = "toTITLE_utf8_safe"; | |
3730 | } | |
3731 | else if (type == DEPRECATE_TO_LOWER) { | |
c44e9413 | 3732 | name = instr(file, "mathoms.c") |
607313a1 KW |
3733 | ? "to_utf8_lower" |
3734 | : "toLOWER_utf8"; | |
3735 | alternative = "toLOWER_utf8_safe"; | |
3736 | } | |
3737 | else if (type == DEPRECATE_TO_FOLD) { | |
c44e9413 | 3738 | name = instr(file, "mathoms.c") |
607313a1 KW |
3739 | ? "to_utf8_fold" |
3740 | : "toFOLD_utf8"; | |
3741 | alternative = "toFOLD_utf8_safe"; | |
3742 | } | |
3743 | else Perl_croak(aTHX_ "panic: Unexpected case change type"); | |
3744 | ||
3745 | warn_on_first_deprecated_use(name, alternative, use_locale, file, line); | |
3746 | } | |
3747 | else { | |
3748 | assert (p < *e); | |
3749 | } | |
3750 | ||
3751 | return utf8n_flags; | |
3752 | } | |
3753 | ||
b257a28c KW |
3754 | STATIC UV |
3755 | S_turkic_fc(pTHX_ const U8 * const p, const U8 * const e, | |
3756 | U8 * ustrp, STRLEN *lenp) | |
3757 | { | |
3758 | /* Returns 0 if the foldcase of the input UTF-8 encoded sequence from | |
3759 | * p0..e-1 according to Turkic rules is the same as for non-Turkic. | |
3760 | * Otherwise, it returns the first code point of the Turkic foldcased | |
3761 | * sequence, and the entire sequence will be stored in *ustrp. ustrp will | |
3762 | * contain *lenp bytes | |
3763 | * | |
3764 | * Turkic differs only from non-Turkic in that 'i' and LATIN CAPITAL LETTER | |
3765 | * I WITH DOT ABOVE form a case pair, as do 'I' and LATIN SMALL LETTER | |
3766 | * DOTLESS I */ | |
3767 | ||
3768 | PERL_ARGS_ASSERT_TURKIC_FC; | |
3769 | assert(e > p); | |
3770 | ||
3771 | if (UNLIKELY(*p == 'I')) { | |
3772 | *lenp = 2; | |
3773 | ustrp[0] = UTF8_TWO_BYTE_HI(LATIN_SMALL_LETTER_DOTLESS_I); | |
3774 | ustrp[1] = UTF8_TWO_BYTE_LO(LATIN_SMALL_LETTER_DOTLESS_I); | |
3775 | return LATIN_SMALL_LETTER_DOTLESS_I; | |
3776 | } | |
3777 | ||
3778 | if (UNLIKELY(memBEGINs(p, e - p, | |
3779 | LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE_UTF8))) | |
3780 | { | |
3781 | *lenp = 1; | |
3782 | *ustrp = 'i'; | |
3783 | return 'i'; | |
3784 | } | |
3785 | ||
3786 | return 0; | |
3787 | } | |
3788 | ||
3789 | STATIC UV | |
3790 | S_turkic_lc(pTHX_ const U8 * const p0, const U8 * const e, | |
3791 | U8 * ustrp, STRLEN *lenp) | |
3792 | { | |
3793 | /* Returns 0 if the lowercase of the input UTF-8 encoded sequence from | |
3794 | * p0..e-1 according to Turkic rules is the same as for non-Turkic. | |
3795 | * Otherwise, it returns the first code point of the Turkic lowercased | |
3796 | * sequence, and the entire sequence will be stored in *ustrp. ustrp will | |
3797 | * contain *lenp bytes */ | |
3798 | ||
1565c085 | 3799 | dVAR; |
b257a28c KW |
3800 | PERL_ARGS_ASSERT_TURKIC_LC; |
3801 | assert(e > p0); | |
3802 | ||
3803 | /* A 'I' requires context as to what to do */ | |
3804 | if (UNLIKELY(*p0 == 'I')) { | |
3805 | const U8 * p = p0 + 1; | |
3806 | ||
3807 | /* According to the Unicode SpecialCasing.txt file, a capital 'I' | |
3808 | * modified by a dot above lowercases to 'i' even in turkic locales. */ | |
3809 | while (p < e) { | |
3810 | UV cp; | |
3811 | ||
3812 | if (memBEGINs(p, e - p, COMBINING_DOT_ABOVE_UTF8)) { | |
3813 | ustrp[0] = 'i'; | |
3814 | *lenp = 1; | |
3815 | return 'i'; | |
3816 | } | |
3817 | ||
3818 | /* For the dot above to modify the 'I', it must be part of a | |
3819 | * combining sequence immediately following the 'I', and no other | |
3820 | * modifier with a ccc of 230 may intervene */ | |
3821 | cp = utf8_to_uvchr_buf(p, e, NULL); | |
3822 | if (! _invlist_contains_cp(PL_CCC_non0_non230, cp)) { | |
3823 | break; | |
3824 | } | |
3825 | ||
3826 | /* Here the combining sequence continues */ | |
3827 | p += UTF8SKIP(p); | |
3828 | } | |
3829 | } | |
3830 | ||
3831 | /* In all other cases the lc is the same as the fold */ | |
3832 | return turkic_fc(p0, e, ustrp, lenp); | |
3833 | } | |
3834 | ||
3835 | STATIC UV | |
3836 | S_turkic_uc(pTHX_ const U8 * const p, const U8 * const e, | |
3837 | U8 * ustrp, STRLEN *lenp) | |
3838 | { | |
3839 | /* Returns 0 if the upper or title-case of the input UTF-8 encoded sequence | |
3840 | * from p0..e-1 according to Turkic rules is the same as for non-Turkic. | |
3841 | * Otherwise, it returns the first code point of the Turkic upper or | |
3842 | * title-cased sequence, and the entire sequence will be stored in *ustrp. | |
3843 | * ustrp will contain *lenp bytes | |
3844 | * | |
3845 | * Turkic differs only from non-Turkic in that 'i' and LATIN CAPITAL LETTER | |
3846 | * I WITH DOT ABOVE form a case pair, as do 'I' and and LATIN SMALL LETTER | |
3847 | * DOTLESS I */ | |
3848 | ||
3849 | PERL_ARGS_ASSERT_TURKIC_UC; | |
3850 | assert(e > p); | |
3851 | ||
3852 | if (*p == 'i') { | |
3853 | *lenp = 2; | |
3854 | ustrp[0] = UTF8_TWO_BYTE_HI(LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE); | |
3855 | ustrp[1] = UTF8_TWO_BYTE_LO(LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE); | |
3856 | return LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE; | |
3857 | } | |
3858 | ||
3859 | if (memBEGINs(p, e - p, LATIN_SMALL_LETTER_DOTLESS_I_UTF8)) { | |
3860 | *lenp = 1; | |
3861 | *ustrp = 'I'; | |
3862 | return 'I'; | |
3863 | } | |
3864 | ||
3865 | return 0; | |
3866 | } | |
3867 | ||
eaf412bf KW |
3868 | /* The process for changing the case is essentially the same for the four case |
3869 | * change types, except there are complications for folding. Otherwise the | |
3870 | * difference is only which case to change to. To make sure that they all do | |
3871 | * the same thing, the bodies of the functions are extracted out into the | |
3872 | * following two macros. The functions are written with the same variable | |
3873 | * names, and these are known and used inside these macros. It would be | |
3874 | * better, of course, to have inline functions to do it, but since different | |
3875 | * macros are called, depending on which case is being changed to, this is not | |
3876 | * feasible in C (to khw's knowledge). Two macros are created so that the fold | |
3877 | * function can start with the common start macro, then finish with its special | |
3878 | * handling; while the other three cases can just use the common end macro. | |
3879 | * | |
3880 | * The algorithm is to use the proper (passed in) macro or function to change | |
3881 | * the case for code points that are below 256. The macro is used if using | |
3882 | * locale rules for the case change; the function if not. If the code point is | |
3883 | * above 255, it is computed from the input UTF-8, and another macro is called | |
3884 | * to do the conversion. If necessary, the output is converted to UTF-8. If | |
3885 | * using a locale, we have to check that the change did not cross the 255/256 | |
3886 | * boundary, see check_locale_boundary_crossing() for further details. | |
3887 | * | |
3888 | * The macros are split with the correct case change for the below-256 case | |
3889 | * stored into 'result', and in the middle of an else clause for the above-255 | |
3890 | * case. At that point in the 'else', 'result' is not the final result, but is | |
3891 | * the input code point calculated from the UTF-8. The fold code needs to | |
3892 | * realize all this and take it from there. | |
3893 | * | |
b257a28c KW |
3894 | * To deal with Turkic locales, the function specified by the parameter |
3895 | * 'turkic' is called when appropriate. | |
3896 | * | |
eaf412bf KW |
3897 | * If you read the two macros as sequential, it's easier to understand what's |
3898 | * going on. */ | |
3899 | #define CASE_CHANGE_BODY_START(locale_flags, LC_L1_change_macro, L1_func, \ | |
b257a28c | 3900 | L1_func_extra_param, turkic) \ |
a239b1e2 | 3901 | \ |
eaf412bf | 3902 | if (flags & (locale_flags)) { \ |
8b7358b9 | 3903 | _CHECK_AND_WARN_PROBLEMATIC_LOCALE; \ |
eaf412bf | 3904 | if (IN_UTF8_CTYPE_LOCALE) { \ |
b257a28c KW |
3905 | if (UNLIKELY(PL_in_utf8_turkic_locale)) { \ |
3906 | UV ret = turkic(p, e, ustrp, lenp); \ | |
3907 | if (ret) return ret; \ | |
3908 | } \ | |
3909 | \ | |
3910 | /* Otherwise, treat a UTF-8 locale as not being in locale at \ | |
3911 | * all */ \ | |
eaf412bf KW |
3912 | flags &= ~(locale_flags); \ |
3913 | } \ | |
eaf412bf KW |
3914 | } \ |
3915 | \ | |
3916 | if (UTF8_IS_INVARIANT(*p)) { \ | |
3917 | if (flags & (locale_flags)) { \ | |
3918 | result = LC_L1_change_macro(*p); \ | |
3919 | } \ | |
3920 | else { \ | |
3921 | return L1_func(*p, ustrp, lenp, L1_func_extra_param); \ | |
3922 | } \ | |
3923 | } \ | |
a239b1e2 | 3924 | else if UTF8_IS_NEXT_CHAR_DOWNGRADEABLE(p, e) { \ |
1a751160 | 3925 | U8 c = EIGHT_BIT_UTF8_TO_NATIVE(*p, *(p+1)); \ |
eaf412bf | 3926 | if (flags & (locale_flags)) { \ |
1a751160 | 3927 | result = LC_L1_change_macro(c); \ |
eaf412bf KW |
3928 | } \ |
3929 | else { \ | |
1a751160 | 3930 | return L1_func(c, ustrp, lenp, L1_func_extra_param); \ |
eaf412bf KW |
3931 | } \ |
3932 | } \ | |
fa8ab374 KW |
3933 | else { /* malformed UTF-8 or ord above 255 */ \ |
3934 | STRLEN len_result; \ | |
fa8ab374 KW |
3935 | result = utf8n_to_uvchr(p, e - p, &len_result, UTF8_CHECK_ONLY); \ |
3936 | if (len_result == (STRLEN) -1) { \ | |
607313a1 KW |
3937 | _force_out_malformed_utf8_message(p, e, utf8n_flags, \ |
3938 | 1 /* Die */ ); \ | |
fa8ab374 | 3939 | } |
eaf412bf KW |
3940 | |
3941 | #define CASE_CHANGE_BODY_END(locale_flags, change_macro) \ | |
3942 | result = change_macro(result, p, ustrp, lenp); \ | |
3943 | \ | |
3944 | if (flags & (locale_flags)) { \ | |
3945 | result = check_locale_boundary_crossing(p, result, ustrp, lenp); \ | |
3946 | } \ | |
3947 | return result; \ | |
3948 | } \ | |
3949 | \ | |
3950 | /* Here, used locale rules. Convert back to UTF-8 */ \ | |
3951 | if (UTF8_IS_INVARIANT(result)) { \ | |
3952 | *ustrp = (U8) result; \ | |
3953 | *lenp = 1; \ | |
3954 | } \ | |
3955 | else { \ | |
3956 | *ustrp = UTF8_EIGHT_BIT_HI((U8) result); \ | |
3957 | *(ustrp + 1) = UTF8_EIGHT_BIT_LO((U8) result); \ | |
3958 | *lenp = 2; \ | |
3959 | } \ | |
3960 | \ | |
3961 | return result; | |
3962 | ||
d3e79532 | 3963 | /* |
87cea99e | 3964 | =for apidoc to_utf8_upper |
d3e79532 | 3965 | |
a239b1e2 | 3966 | Instead use L</toUPPER_utf8_safe>. |
a1433954 | 3967 | |
d3e79532 JH |
3968 | =cut */ |
3969 | ||
051a06d4 | 3970 | /* Not currently externally documented, and subject to change: |
31f05a37 KW |
3971 | * <flags> is set iff iff the rules from the current underlying locale are to |
3972 | * be used. */ | |
051a06d4 | 3973 | |
2104c8d9 | 3974 | UV |
607313a1 KW |
3975 | Perl__to_utf8_upper_flags(pTHX_ const U8 *p, |
3976 | const U8 *e, | |
3977 | U8* ustrp, | |
3978 | STRLEN *lenp, | |
3979 | bool flags, | |
3980 | const char * const file, | |
3981 | const int line) | |
a0ed51b3 | 3982 | { |
1565c085 | 3983 | dVAR; |
051a06d4 | 3984 | UV result; |
607313a1 KW |
3985 | const U32 utf8n_flags = check_and_deprecate(p, &e, DEPRECATE_TO_UPPER, |
3986 | cBOOL(flags), file, line); | |
051a06d4 KW |
3987 | |
3988 | PERL_ARGS_ASSERT__TO_UTF8_UPPER_FLAGS; | |
7918f24d | 3989 | |
eaf412bf KW |
3990 | /* ~0 makes anything non-zero in 'flags' mean we are using locale rules */ |
3991 | /* 2nd char of uc(U+DF) is 'S' */ | |
b257a28c KW |
3992 | CASE_CHANGE_BODY_START(~0, toUPPER_LC, _to_upper_title_latin1, 'S', |
3993 | turkic_uc); | |
eaf412bf | 3994 | CASE_CHANGE_BODY_END (~0, CALL_UPPER_CASE); |
983ffd37 | 3995 | } |
a0ed51b3 | 3996 | |
d3e79532 | 3997 | /* |
87cea99e | 3998 | =for apidoc to_utf8_title |
d3e79532 | 3999 | |
a239b1e2 | 4000 | Instead use L</toTITLE_utf8_safe>. |
a1433954 | 4001 | |
d3e79532 JH |
4002 | =cut */ |
4003 | ||
051a06d4 | 4004 | /* Not currently externally documented, and subject to change: |
31f05a37 KW |
4005 | * <flags> is set iff the rules from the current underlying locale are to be |
4006 | * used. Since titlecase is not defined in POSIX, for other than a | |
4007 | * UTF-8 locale, uppercase is used instead for code points < 256. | |
445bf929 | 4008 | */ |
051a06d4 | 4009 | |
983ffd37 | 4010 | UV |
607313a1 KW |
4011 | Perl__to_utf8_title_flags(pTHX_ const U8 *p, |
4012 | const U8 *e, | |
4013 | U8* ustrp, | |
4014 | STRLEN *lenp, | |
4015 | bool flags, | |
4016 | const char * const file, | |
4017 | const int line) | |
983ffd37 | 4018 | { |
1565c085 | 4019 | dVAR; |
051a06d4 | 4020 | UV result; |
607313a1 KW |
4021 | const U32 utf8n_flags = check_and_deprecate(p, &e, DEPRECATE_TO_TITLE, |
4022 | cBOOL(flags), file, line); | |
051a06d4 KW |
4023 | |
4024 | PERL_ARGS_ASSERT__TO_UTF8_TITLE_FLAGS; | |
7918f24d | 4025 | |
eaf412bf | 4026 | /* 2nd char of ucfirst(U+DF) is 's' */ |
b257a28c KW |
4027 | CASE_CHANGE_BODY_START(~0, toUPPER_LC, _to_upper_title_latin1, 's', |
4028 | turkic_uc); | |
eaf412bf | 4029 | CASE_CHANGE_BODY_END (~0, CALL_TITLE_CASE); |
a0ed51b3 LW |
4030 | } |
4031 | ||
d3e79532 | 4032 | /* |
87cea99e | 4033 | =for apidoc to_utf8_lower |
d3e79532 | 4034 | |
a239b1e2 | 4035 | Instead use L</toLOWER_utf8_safe>. |
a1433954 | 4036 | |
d3e79532 JH |
4037 | =cut */ |
4038 | ||
051a06d4 | 4039 | /* Not currently externally documented, and subject to change: |
31f05a37 KW |
4040 | * <flags> is set iff iff the rules from the current underlying locale are to |
4041 | * be used. | |
4042 | */ | |
051a06d4 | 4043 | |
2104c8d9 | 4044 | UV |
607313a1 KW |
4045 | Perl__to_utf8_lower_flags(pTHX_ const U8 *p, |
4046 | const U8 *e, | |
4047 | U8* ustrp, | |
4048 | STRLEN *lenp, | |
4049 | bool flags, | |
4050 | const char * const file, | |
4051 | const int line) | |
a0ed51b3 | 4052 | { |
1565c085 | 4053 | dVAR; |
051a06d4 | 4054 | UV result; |
607313a1 KW |
4055 | const U32 utf8n_flags = check_and_deprecate(p, &e, DEPRECATE_TO_LOWER, |
4056 | cBOOL(flags), file, line); | |
051a06d4 | 4057 | |
051a06d4 | 4058 | PERL_ARGS_ASSERT__TO_UTF8_LOWER_FLAGS; |
7918f24d | 4059 | |
b257a28c KW |
4060 | CASE_CHANGE_BODY_START(~0, toLOWER_LC, to_lower_latin1, 0 /* 0 is dummy */, |
4061 | turkic_lc); | |
eaf412bf | 4062 | CASE_CHANGE_BODY_END (~0, CALL_LOWER_CASE) |
b4e400f9 JH |
4063 | } |
4064 | ||
d3e79532 | 4065 | /* |
87cea99e | 4066 | =for apidoc to_utf8_fold |
d3e79532 | 4067 | |
a239b1e2 | 4068 | Instead use L</toFOLD_utf8_safe>. |
a1433954 | 4069 | |
d3e79532 JH |
4070 | =cut */ |
4071 | ||
051a06d4 KW |
4072 | /* Not currently externally documented, and subject to change, |
4073 | * in <flags> | |
31f05a37 KW |
4074 | * bit FOLD_FLAGS_LOCALE is set iff the rules from the current underlying |
4075 | * locale are to be used. | |
051a06d4 KW |
4076 | * bit FOLD_FLAGS_FULL is set iff full case folds are to be used; |
4077 | * otherwise simple folds | |
a0270393 KW |
4078 | * bit FOLD_FLAGS_NOMIX_ASCII is set iff folds of non-ASCII to ASCII are |
4079 | * prohibited | |
445bf929 | 4080 | */ |
36bb2ab6 | 4081 | |
b4e400f9 | 4082 | UV |
607313a1 KW |
4083 | Perl__to_utf8_fold_flags(pTHX_ const U8 *p, |
4084 | const U8 *e, | |
4085 | U8* ustrp, | |
4086 | STRLEN *lenp, | |
4087 | U8 flags, | |
4088 | const char * const file, | |
4089 | const int line) | |
b4e400f9 | 4090 | { |
1565c085 | 4091 | dVAR; |
051a06d4 | 4092 | UV result; |
607313a1 KW |
4093 | const U32 utf8n_flags = check_and_deprecate(p, &e, DEPRECATE_TO_FOLD, |
4094 | cBOOL(flags), file, line); | |
051a06d4 | 4095 | |
36bb2ab6 | 4096 | PERL_ARGS_ASSERT__TO_UTF8_FOLD_FLAGS; |
7918f24d | 4097 | |
a0270393 KW |
4098 | /* These are mutually exclusive */ |
4099 | assert (! ((flags & FOLD_FLAGS_LOCALE) && (flags & FOLD_FLAGS_NOMIX_ASCII))); | |
4100 | ||
50ba90ff KW |
4101 | assert(p != ustrp); /* Otherwise overwrites */ |
4102 | ||
eaf412bf | 4103 | CASE_CHANGE_BODY_START(FOLD_FLAGS_LOCALE, toFOLD_LC, _to_fold_latin1, |
b257a28c KW |
4104 | ((flags) & (FOLD_FLAGS_FULL | FOLD_FLAGS_NOMIX_ASCII)), |
4105 | turkic_fc); | |
31f05a37 | 4106 | |
eaf412bf | 4107 | result = CALL_FOLD_CASE(result, p, ustrp, lenp, flags & FOLD_FLAGS_FULL); |
a1dde8de | 4108 | |
1ca267a5 KW |
4109 | if (flags & FOLD_FLAGS_LOCALE) { |
4110 | ||
76f2ffcd | 4111 | # define LONG_S_T LATIN_SMALL_LIGATURE_LONG_S_T_UTF8 |
0766489e KW |
4112 | # ifdef LATIN_CAPITAL_LETTER_SHARP_S_UTF8 |
4113 | # define CAP_SHARP_S LATIN_CAPITAL_LETTER_SHARP_S_UTF8 | |
76f2ffcd | 4114 | |
538e84ed KW |
4115 | /* Special case these two characters, as what normally gets |
4116 | * returned under locale doesn't work */ | |
db540106 | 4117 | if (memBEGINs((char *) p, e - p, CAP_SHARP_S)) |
1ca267a5 | 4118 | { |
ab0b796c KW |
4119 | /* diag_listed_as: Can't do %s("%s") on non-UTF-8 locale; resolved to "%s". */ |
4120 | Perl_ck_warner(aTHX_ packWARN(WARN_LOCALE), | |
4121 | "Can't do fc(\"\\x{1E9E}\") on non-UTF-8 locale; " | |
4122 | "resolved to \"\\x{17F}\\x{17F}\"."); | |
1ca267a5 KW |
4123 | goto return_long_s; |
4124 | } | |
0766489e KW |
4125 | else |
4126 | #endif | |
db540106 | 4127 | if (memBEGINs((char *) p, e - p, LONG_S_T)) |
9fc2026f | 4128 | { |
ab0b796c KW |
4129 | /* diag_listed_as: Can't do %s("%s") on non-UTF-8 locale; resolved to "%s". */ |
4130 | Perl_ck_warner(aTHX_ packWARN(WARN_LOCALE), | |
4131 | "Can't do fc(\"\\x{FB05}\") on non-UTF-8 locale; " | |
4132 | "resolved to \"\\x{FB06}\"."); | |
9fc2026f KW |
4133 | goto return_ligature_st; |
4134 | } | |
74894415 KW |
4135 | |
4136 | #if UNICODE_MAJOR_VERSION == 3 \ | |
4137 | && UNICODE_DOT_VERSION == 0 \ | |
4138 | && UNICODE_DOT_DOT_VERSION == 1 | |
4139 | # define DOTTED_I LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE_UTF8 | |
4140 | ||
4141 | /* And special case this on this Unicode version only, for the same | |
4142 | * reaons the other two are special cased. They would cross the | |
4143 | * 255/256 boundary which is forbidden under /l, and so the code | |
4144 | * wouldn't catch that they are equivalent (which they are only in | |
4145 | * this release) */ | |
db540106 | 4146 | else if (memBEGINs((char *) p, e - p, DOTTED_I)) { |
74894415 KW |
4147 | /* diag_listed_as: Can't do %s("%s") on non-UTF-8 locale; resolved to "%s". */ |
4148 | Perl_ck_warner(aTHX_ packWARN(WARN_LOCALE), | |
4149 | "Can't do fc(\"\\x{0130}\") on non-UTF-8 locale; " | |
4150 | "resolved to \"\\x{0131}\"."); | |
4151 | goto return_dotless_i; | |
4152 | } | |
4153 | #endif | |
4154 | ||
357aadde | 4155 | return check_locale_boundary_crossing(p, result, ustrp, lenp); |
051a06d4 | 4156 | } |
a0270393 KW |
4157 | else if (! (flags & FOLD_FLAGS_NOMIX_ASCII)) { |
4158 | return result; | |
4159 | } | |
4160 | else { | |
4a4088c4 | 4161 | /* This is called when changing the case of a UTF-8-encoded |
9fc2026f KW |
4162 | * character above the ASCII range, and the result should not |
4163 | * contain an ASCII character. */ | |
a0270393 KW |
4164 | |
4165 | UV original; /* To store the first code point of <p> */ | |
4166 | ||
4167 | /* Look at every character in the result; if any cross the | |
4168 | * boundary, the whole thing is disallowed */ | |
4169 | U8* s = ustrp; | |
4170 | U8* e = ustrp + *lenp; | |
4171 | while (s < e) { | |
4172 | if (isASCII(*s)) { | |
4173 | /* Crossed, have to return the original */ | |
4174 | original = valid_utf8_to_uvchr(p, lenp); | |
1ca267a5 | 4175 | |
9fc2026f | 4176 | /* But in these instances, there is an alternative we can |
1ca267a5 | 4177 | * return that is valid */ |
0766489e KW |
4178 | if (original == LATIN_SMALL_LETTER_SHARP_S |
4179 | #ifdef LATIN_CAPITAL_LETTER_SHARP_S /* not defined in early Unicode releases */ | |
4180 | || original == LATIN_CAPITAL_LETTER_SHARP_S | |
4181 | #endif | |
4182 | ) { | |
1ca267a5 KW |
4183 | goto return_long_s; |
4184 | } | |
9fc2026f KW |
4185 | else if (original == LATIN_SMALL_LIGATURE_LONG_S_T) { |
4186 | goto return_ligature_st; | |
4187 | } | |
74894415 KW |
4188 | #if UNICODE_MAJOR_VERSION == 3 \ |
4189 | && UNICODE_DOT_VERSION == 0 \ | |
4190 | && UNICODE_DOT_DOT_VERSION == 1 | |
4191 | ||
4192 | else if (original == LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE) { | |
4193 | goto return_dotless_i; | |
4194 | } | |
4195 | #endif | |
a0270393 KW |
4196 | Copy(p, ustrp, *lenp, char); |
4197 | return original; | |
4198 | } | |
4199 | s += UTF8SKIP(s); | |
4200 | } | |
051a06d4 | 4201 | |
a0270393 KW |
4202 | /* Here, no characters crossed, result is ok as-is */ |
4203 | return result; | |
4204 | } | |
051a06d4 KW |
4205 | } |
4206 | ||
4a4088c4 | 4207 | /* Here, used locale rules. Convert back to UTF-8 */ |
051a06d4 KW |
4208 | if (UTF8_IS_INVARIANT(result)) { |
4209 | *ustrp = (U8) result; | |
4210 | *lenp = 1; | |
4211 | } | |
4212 | else { | |
62cb07ea KW |
4213 | *ustrp = UTF8_EIGHT_BIT_HI((U8) result); |
4214 | *(ustrp + 1) = UTF8_EIGHT_BIT_LO((U8) result); | |
051a06d4 KW |
4215 | *lenp = 2; |
4216 | } | |
4217 | ||
051a06d4 | 4218 | return result; |
1ca267a5 KW |
4219 | |
4220 | return_long_s: | |
4221 | /* Certain folds to 'ss' are prohibited by the options, but they do allow | |
4222 | * folds to a string of two of these characters. By returning this | |
4223 | * instead, then, e.g., | |
4224 | * fc("\x{1E9E}") eq fc("\x{17F}\x{17F}") | |
4225 | * works. */ | |
4226 | ||
4227 | *lenp = 2 * sizeof(LATIN_SMALL_LETTER_LONG_S_UTF8) - 2; | |
68a23e40 | 4228 | Copy(LATIN_SMALL_LETTER_LONG_S_UTF8 LATIN_SMALL_LETTER_LONG_S_UTF8, |
1ca267a5 KW |
4229 | ustrp, *lenp, U8); |
4230 | return LATIN_SMALL_LETTER_LONG_S; | |
9fc2026f KW |
4231 | |
4232 | return_ligature_st: | |
4233 | /* Two folds to 'st' are prohibited by the options; instead we pick one and | |
4234 | * have the other one fold to it */ | |
4235 | ||
4236 | *lenp = sizeof(LATIN_SMALL_LIGATURE_ST_UTF8) - 1; | |
4237 | Copy(LATIN_SMALL_LIGATURE_ST_UTF8, ustrp, *lenp, U8); | |
4238 | return LATIN_SMALL_LIGATURE_ST; | |
74894415 KW |
4239 | |
4240 | #if UNICODE_MAJOR_VERSION == 3 \ | |
4241 | && UNICODE_DOT_VERSION == 0 \ | |
4242 | && UNICODE_DOT_DOT_VERSION == 1 | |
4243 | ||
4244 | return_dotless_i: | |
4245 | *lenp = sizeof(LATIN_SMALL_LETTER_DOTLESS_I_UTF8) - 1; | |
4246 | Copy(LATIN_SMALL_LETTER_DOTLESS_I_UTF8, ustrp, *lenp, U8); | |
4247 | return LATIN_SMALL_LETTER_DOTLESS_I; | |
4248 | ||
4249 | #endif | |
4250 | ||
a0ed51b3 LW |
4251 | } |
4252 | ||
711a919c | 4253 | /* Note: |
f90a9a02 | 4254 | * Returns a "swash" which is a hash described in utf8.c:Perl_swash_fetch(). |
711a919c TS |
4255 | * C<pkg> is a pointer to a package name for SWASHNEW, should be "utf8". |
4256 | * For other parameters, see utf8::SWASHNEW in lib/utf8_heavy.pl. | |
4257 | */ | |
c4a5db0c | 4258 | |
a0ed51b3 | 4259 | SV* |
56576a04 KW |
4260 | Perl_swash_init(pTHX_ const char* pkg, const char* name, SV *listsv, |
4261 | I32 minbits, I32 none) | |
a0ed51b3 | 4262 | { |
c4a5db0c KW |
4263 | /* Returns a copy of a swash initiated by the called function. This is the |
4264 | * public interface, and returning a copy prevents others from doing | |
4c404f26 | 4265 | * mischief on the original. The only remaining use of this is in tr/// */ |
2c1f00b9 YO |
4266 | |
4267 | /*NOTE NOTE NOTE - If you want to use "return" in this routine you MUST | |
4268 | * use the following define */ | |
4269 | ||
4c404f26 | 4270 | #define SWASH_INIT_RETURN(x) \ |
2c1f00b9 | 4271 | PL_curpm= old_PL_curpm; \ |
4c404f26 | 4272 | return newSVsv(x) |
2c1f00b9 | 4273 | |
c4a5db0c | 4274 | /* Initialize and return a swash, creating it if necessary. It does this |
4c404f26 | 4275 | * by calling utf8_heavy.pl in the general case. |
c4a5db0c KW |
4276 | * |
4277 | * pkg is the name of the package that <name> should be in. | |
4c404f26 | 4278 | * name is the name of the swash to find. |
c4a5db0c KW |
4279 | * listsv is a string to initialize the swash with. It must be of the form |
4280 | * documented as the subroutine return value in | |
4281 | * L<perlunicode/User-Defined Character Properties> | |
4282 | * minbits is the number of bits required to represent each data element. | |
c4a5db0c | 4283 | * none I (khw) do not understand this one, but it is used only in tr///. |
9a53f6cf | 4284 | * |
4c404f26 KW |
4285 | * Thus there are two possible inputs to find the swash: <name> and |
4286 | * <listsv>. At least one must be specified. The result | |
9a53f6cf | 4287 | * will be the union of the specified ones, although <listsv>'s various |
aabbdbda KW |
4288 | * actions can intersect, etc. what <name> gives. To avoid going out to |
4289 | * disk at all, <invlist> should specify completely what the swash should | |
4290 | * have, and <listsv> should be &PL_sv_undef and <name> should be "". | |
4c404f26 | 4291 | */ |
c4a5db0c | 4292 | |
2c1f00b9 YO |
4293 | PMOP *old_PL_curpm= PL_curpm; /* save away the old PL_curpm */ |
4294 | ||
c4a5db0c | 4295 | SV* retval = &PL_sv_undef; |
9a53f6cf | 4296 | |
4c404f26 KW |
4297 | PERL_ARGS_ASSERT_SWASH_INIT; |
4298 | ||
4299 | assert(listsv != &PL_sv_undef || strNE(name, "")); | |
9a53f6cf | 4300 | |
56576a04 KW |
4301 | PL_curpm= NULL; /* reset PL_curpm so that we dont get confused between the |
4302 | regex that triggered the swash init and the swash init | |
4303 | perl logic itself. See perl #122747 */ | |
2c1f00b9 | 4304 | |
9a53f6cf KW |
4305 | /* If data was passed in to go out to utf8_heavy to find the swash of, do |
4306 | * so */ | |
4307 | if (listsv != &PL_sv_undef || strNE(name, "")) { | |
69794297 KW |
4308 | dSP; |
4309 | const size_t pkg_len = strlen(pkg); | |
4310 | const size_t name_len = strlen(name); | |
4311 | HV * const stash = gv_stashpvn(pkg, pkg_len, 0); | |
4312 | SV* errsv_save; | |
4313 | GV *method; | |
4314 | ||
69794297 KW |
4315 | |
4316 | PUSHSTACKi(PERLSI_MAGIC); | |
ce3b816e | 4317 | ENTER; |
69794297 | 4318 | SAVEHINTS(); |
2782061f | 4319 | save_re_context(); |
650f067c JL |
4320 | /* We might get here via a subroutine signature which uses a utf8 |
4321 | * parameter name, at which point PL_subname will have been set | |
4322 | * but not yet used. */ | |
4323 | save_item(PL_subname); | |
69794297 KW |
4324 | if (PL_parser && PL_parser->error_count) |
4325 | SAVEI8(PL_parser->error_count), PL_parser->error_count = 0; | |
4326 | method = gv_fetchmeth(stash, "SWASHNEW", 8, -1); | |
4a4088c4 | 4327 | if (!method) { /* demand load UTF-8 */ |
69794297 | 4328 | ENTER; |
db2c6cb3 FC |
4329 | if ((errsv_save = GvSV(PL_errgv))) SAVEFREESV(errsv_save); |
4330 | GvSV(PL_errgv) = NULL; | |
1a419e6b | 4331 | #ifndef NO_TAINT_SUPPORT |
69794297 KW |
4332 | /* It is assumed that callers of this routine are not passing in |
4333 | * any user derived data. */ | |
2782061f DM |
4334 | /* Need to do this after save_re_context() as it will set |
4335 | * PL_tainted to 1 while saving $1 etc (see the code after getrx: | |
4336 | * in Perl_magic_get). Even line to create errsv_save can turn on | |
4337 | * PL_tainted. */ | |
284167a5 S |
4338 | SAVEBOOL(TAINT_get); |
4339 | TAINT_NOT; | |
4340 | #endif | |
ebf06983 | 4341 | require_pv("utf8_heavy.pl"); |
eed484f9 | 4342 | { |
db2c6cb3 FC |
4343 | /* Not ERRSV, as there is no need to vivify a scalar we are |
4344 | about to discard. */ | |
4345 | SV * const errsv = GvSV(PL_errgv); | |
4346 | if (!SvTRUE(errsv)) { | |
4347 | GvSV(PL_errgv) = SvREFCNT_inc_simple(errsv_save); | |
4348 | SvREFCNT_dec(errsv); | |
4349 | } | |
eed484f9 | 4350 | } |
69794297 KW |
4351 | LEAVE; |
4352 | } | |
4353 | SPAGAIN; | |
4354 | PUSHMARK(SP); | |
4355 | EXTEND(SP,5); | |
4356 | mPUSHp(pkg, pkg_len); | |
4357 | mPUSHp(name, name_len); | |
4358 | PUSHs(listsv); | |
4359 | mPUSHi(minbits); | |
4360 | mPUSHi(none); | |
4361 | PUTBACK; | |
db2c6cb3 FC |
4362 | if ((errsv_save = GvSV(PL_errgv))) SAVEFREESV(errsv_save); |
4363 | GvSV(PL_errgv) = NULL; | |
69794297 KW |
4364 | /* If we already have a pointer to the method, no need to use |
4365 | * call_method() to repeat the lookup. */ | |
c41800a8 KW |
4366 | if (method |
4367 | ? call_sv(MUTABLE_SV(method), G_SCALAR) | |
69794297 KW |
4368 | : call_sv(newSVpvs_flags("SWASHNEW", SVs_TEMP), G_SCALAR | G_METHOD)) |
4369 | { | |
4370 | retval = *PL_stack_sp--; | |
4371 | SvREFCNT_inc(retval); | |
4372 | } | |
eed484f9 | 4373 | { |
db2c6cb3 FC |
4374 | /* Not ERRSV. See above. */ |
4375 | SV * const errsv = GvSV(PL_errgv); | |
4376 | if (!SvTRUE(errsv)) { | |
4377 | GvSV(PL_errgv) = SvREFCNT_inc_simple(errsv_save); | |
4378 | SvREFCNT_dec(errsv); | |
4379 | } | |
eed484f9 | 4380 | } |
ce3b816e | 4381 | LEAVE; |
69794297 KW |
4382 | POPSTACK; |
4383 | if (IN_PERL_COMPILETIME) { | |
4384 | CopHINTS_set(PL_curcop, PL_hints); | |
4385 | } | |
9a53f6cf | 4386 | } /* End of calling the module to find the swash */ |
36eb48b4 | 4387 | |
4c404f26 KW |
4388 | SWASH_INIT_RETURN(retval); |
4389 | #undef SWASH_INIT_RETURN | |
a0ed51b3 LW |
4390 | } |
4391 | ||
035d37be JH |
4392 | |
4393 | /* This API is wrong for special case conversions since we may need to | |
4394 | * return several Unicode characters for a single Unicode character | |
4395 | * (see lib/unicore/SpecCase.txt) The SWASHGET in lib/utf8_heavy.pl is | |
4396 | * the lower-level routine, and it is similarly broken for returning | |
38684baa | 4397 | * multiple values. --jhi |
b9992569 | 4398 | * For those, you should use S__to_utf8_case() instead */ |
b0e3252e | 4399 | /* Now SWASHGET is recasted into S_swatch_get in this file. */ |
680c470c TS |
4400 | |
4401 | /* Note: | |
4402 | * Returns the value of property/mapping C<swash> for the first character | |
4403 | * of the string C<ptr>. If C<do_utf8> is true, the string C<ptr> is | |
4a4088c4 | 4404 | * assumed to be in well-formed UTF-8. If C<do_utf8> is false, the string C<ptr> |
3d0f8846 | 4405 | * is assumed to be in native 8-bit encoding. Caches the swatch in C<swash>. |
af2af982 KW |
4406 | * |
4407 | * A "swash" is a hash which contains initially the keys/values set up by | |
4408 | * SWASHNEW. The purpose is to be able to completely represent a Unicode | |
4409 | * property for all possible code points. Things are stored in a compact form | |
4410 | * (see utf8_heavy.pl) so that calculation is required to find the actual | |
4411 | * property value for a given code point. As code points are looked up, new | |
4412 | * key/value pairs are added to the hash, so that the calculation doesn't have | |
4413 | * to ever be re-done. Further, each calculation is done, not just for the | |
4414 | * desired one, but for a whole block of code points adjacent to that one. | |
4415 | * For binary properties on ASCII machines, the block is usually for 64 code | |
4416 | * points, starting with a code point evenly divisible by 64. Thus if the | |
4417 | * property value for code point 257 is requested, the code goes out and | |
4418 | * calculates the property values for all 64 code points between 256 and 319, | |
4419 | * and stores these as a single 64-bit long bit vector, called a "swatch", | |
4420 | * under the key for code point 256. The key is the UTF-8 encoding for code | |
4421 | * point 256, minus the final byte. Thus, if the length of the UTF-8 encoding | |
4422 | * for a code point is 13 bytes, the key will be 12 bytes long. If the value | |
4423 | * for code point 258 is then requested, this code realizes that it would be | |
4424 | * stored under the key for 256, and would find that value and extract the | |
4425 | * relevant bit, offset from 256. | |
4426 | * | |
4427 | * Non-binary properties are stored in as many bits as necessary to represent | |
4428 | * their values (32 currently, though the code is more general than that), not | |
fc273927 | 4429 | * as single bits, but the principle is the same: the value for each key is a |
af2af982 KW |
4430 | * vector that encompasses the property values for all code points whose UTF-8 |
4431 | * representations are represented by the key. That is, for all code points | |
4432 | * whose UTF-8 representations are length N bytes, and the key is the first N-1 | |
4433 | * bytes of that. | |
680c470c | 4434 | */ |
a0ed51b3 | 4435 | UV |
680c470c | 4436 | Perl_swash_fetch(pTHX_ SV *swash, const U8 *ptr, bool do_utf8) |
a0ed51b3 | 4437 | { |
ef8f7699 | 4438 | HV *const hv = MUTABLE_HV(SvRV(swash)); |
3568d838 JH |
4439 | U32 klen; |
4440 | U32 off; | |
9b56a019 | 4441 | STRLEN slen = 0; |
7d85a32c | 4442 | STRLEN needents; |
cfd0369c | 4443 | const U8 *tmps = NULL; |
979f2922 | 4444 | SV *swatch; |
08fb1ac5 | 4445 | const U8 c = *ptr; |
3568d838 | 4446 | |
7918f24d NC |
4447 | PERL_ARGS_ASSERT_SWASH_FETCH; |
4448 | ||
87367d5f KW |
4449 | /* If it really isn't a hash, it isn't really swash; must be an inversion |
4450 | * list */ | |
4451 | if (SvTYPE(hv) != SVt_PVHV) { | |
4452 | return _invlist_contains_cp((SV*)hv, | |
4453 | (do_utf8) | |
4454 | ? valid_utf8_to_uvchr(ptr, NULL) | |
4455 | : c); | |
4456 | } | |
4457 | ||
08fb1ac5 KW |
4458 | /* We store the values in a "swatch" which is a vec() value in a swash |
4459 | * hash. Code points 0-255 are a single vec() stored with key length | |
4460 | * (klen) 0. All other code points have a UTF-8 representation | |
4461 | * 0xAA..0xYY,0xZZ. A vec() is constructed containing all of them which | |
4462 | * share 0xAA..0xYY, which is the key in the hash to that vec. So the key | |
4463 | * length for them is the length of the encoded char - 1. ptr[klen] is the | |
4464 | * final byte in the sequence representing the character */ | |
4465 | if (!do_utf8 || UTF8_IS_INVARIANT(c)) { | |
4466 | klen = 0; | |
4467 | needents = 256; | |
4468 | off = c; | |
3568d838 | 4469 | } |
08fb1ac5 KW |
4470 | else if (UTF8_IS_DOWNGRADEABLE_START(c)) { |
4471 | klen = 0; | |
4472 | needents = 256; | |
a62b247b | 4473 | off = EIGHT_BIT_UTF8_TO_NATIVE(c, *(ptr + 1)); |
979f2922 TS |
4474 | } |
4475 | else { | |
08fb1ac5 KW |
4476 | klen = UTF8SKIP(ptr) - 1; |
4477 | ||
4478 | /* Each vec() stores 2**UTF_ACCUMULATION_SHIFT values. The offset into | |
4479 | * the vec is the final byte in the sequence. (In EBCDIC this is | |
4480 | * converted to I8 to get consecutive values.) To help you visualize | |
4481 | * all this: | |
4482 | * Straight 1047 After final byte | |
4483 | * UTF-8 UTF-EBCDIC I8 transform | |
4484 | * U+0400: \xD0\x80 \xB8\x41\x41 \xB8\x41\xA0 | |
4485 | * U+0401: \xD0\x81 \xB8\x41\x42 \xB8\x41\xA1 | |
4486 | * ... | |
4487 | * U+0409: \xD0\x89 \xB8\x41\x4A \xB8\x41\xA9 | |
4488 | * U+040A: \xD0\x8A \xB8\x41\x51 \xB8\x41\xAA | |
4489 | * ... | |
4490 | * U+0412: \xD0\x92 \xB8\x41\x59 \xB8\x41\xB2 | |
4491 | * U+0413: \xD0\x93 \xB8\x41\x62 \xB8\x41\xB3 | |
4492 | * ... | |
4493 | * U+041B: \xD0\x9B \xB8\x41\x6A \xB8\x41\xBB | |
4494 | * U+041C: \xD0\x9C \xB8\x41\x70 \xB8\x41\xBC | |
4495 | * ... | |
4496 | * U+041F: \xD0\x9F \xB8\x41\x73 \xB8\x41\xBF | |
4497 | * U+0420: \xD0\xA0 \xB8\x42\x41 \xB8\x42\x41 | |
4498 | * | |
4499 | * (There are no discontinuities in the elided (...) entries.) | |
4500 | * The UTF-8 key for these 33 code points is '\xD0' (which also is the | |
4501 | * key for the next 31, up through U+043F, whose UTF-8 final byte is | |
4502 | * \xBF). Thus in UTF-8, each key is for a vec() for 64 code points. | |
4503 | * The final UTF-8 byte, which ranges between \x80 and \xBF, is an | |
4504 | * index into the vec() swatch (after subtracting 0x80, which we | |
4505 | * actually do with an '&'). | |
4506 | * In UTF-EBCDIC, each key is for a 32 code point vec(). The first 32 | |
4507 | * code points above have key '\xB8\x41'. The final UTF-EBCDIC byte has | |
4508 | * dicontinuities which go away by transforming it into I8, and we | |
4509 | * effectively subtract 0xA0 to get the index. */ | |
979f2922 | 4510 | needents = (1 << UTF_ACCUMULATION_SHIFT); |
bc3632a8 | 4511 | off = NATIVE_UTF8_TO_I8(ptr[klen]) & UTF_CONTINUATION_MASK; |
979f2922 | 4512 | } |
7d85a32c | 4513 | |
a0ed51b3 | 4514 | /* |
4a4088c4 | 4515 | * This single-entry cache saves about 1/3 of the UTF-8 overhead in test |
a0ed51b3 LW |
4516 | * suite. (That is, only 7-8% overall over just a hash cache. Still, |
4517 | * it's nothing to sniff at.) Pity we usually come through at least | |
4518 | * two function calls to get here... | |
4519 | * | |
4520 | * NB: this code assumes that swatches are never modified, once generated! | |
4521 | */ | |
4522 | ||
3568d838 | 4523 | if (hv == PL_last_swash_hv && |
a0ed51b3 | 4524 | klen == PL_last_swash_klen && |
27da23d5 | 4525 | (!klen || memEQ((char *)ptr, (char *)PL_last_swash_key, klen)) ) |
a0ed51b3 LW |
4526 | { |
4527 | tmps = PL_last_swash_tmps; | |
4528 | slen = PL_last_swash_slen; | |
4529 | } | |
4530 | else { | |
4531 | /* Try our second-level swatch cache, kept in a hash. */ | |
e1ec3a88 | 4532 | SV** svp = hv_fetch(hv, (const char*)ptr, klen, FALSE); |
a0ed51b3 | 4533 | |
b0e3252e | 4534 | /* If not cached, generate it via swatch_get */ |
979f2922 | 4535 | if (!svp || !SvPOK(*svp) |
08fb1ac5 KW |
4536 | || !(tmps = (const U8*)SvPV_const(*svp, slen))) |
4537 | { | |
4538 | if (klen) { | |
4539 | const UV code_point = valid_utf8_to_uvchr(ptr, NULL); | |
4540 | swatch = swatch_get(swash, | |
4541 | code_point & ~((UV)needents - 1), | |
4542 | needents); | |
4543 | } | |
4544 | else { /* For the first 256 code points, the swatch has a key of | |
4545 | length 0 */ | |
4546 | swatch = swatch_get(swash, 0, needents); | |
4547 | } | |
979f2922 | 4548 | |
923e4eb5 | 4549 | if (IN_PERL_COMPILETIME) |
623e6609 | 4550 | CopHINTS_set(PL_curcop, PL_hints); |
a0ed51b3 | 4551 | |
979f2922 | 4552 | svp = hv_store(hv, (const char *)ptr, klen, swatch, 0); |
a0ed51b3 | 4553 | |
979f2922 TS |
4554 | if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) |
4555 | || (slen << 3) < needents) | |
5637ef5b | 4556 | Perl_croak(aTHX_ "panic: swash_fetch got improper swatch, " |
147e3846 | 4557 | "svp=%p, tmps=%p, slen=%" UVuf ", needents=%" UVuf, |
5637ef5b | 4558 | svp, tmps, (UV)slen, (UV)needents); |
a0ed51b3 LW |
4559 | } |
4560 | ||
4561 | PL_last_swash_hv = hv; | |
16d8f38a | 4562 | assert(klen <= sizeof(PL_last_swash_key)); |
eac04b2e | 4563 | PL_last_swash_klen = (U8)klen; |
cfd0369c NC |
4564 | /* FIXME change interpvar.h? */ |
4565 | PL_last_swash_tmps = (U8 *) tmps; | |
a0ed51b3 LW |
4566 | PL_last_swash_slen = slen; |
4567 | if (klen) | |
4568 | Copy(ptr, PL_last_swash_key, klen, U8); | |
4569 | } | |
4570 | ||
9faf8d75 | 4571 | switch ((int)((slen << 3) / needents)) { |
a0ed51b3 | 4572 | case 1: |
e7aca353 | 4573 | return ((UV) tmps[off >> 3] & (1 << (off & 7))) != 0; |
a0ed51b3 | 4574 | case 8: |
e7aca353 | 4575 | return ((UV) tmps[off]); |
a0ed51b3 LW |
4576 | case 16: |
4577 | off <<= 1; | |
e7aca353 JH |
4578 | return |
4579 | ((UV) tmps[off ] << 8) + | |
4580 | ((UV) tmps[off + 1]); | |
a0ed51b3 LW |
4581 | case 32: |
4582 | off <<= 2; | |
e7aca353 JH |
4583 | return |
4584 | ((UV) tmps[off ] << 24) + | |
4585 | ((UV) tmps[off + 1] << 16) + | |
4586 | ((UV) tmps[off + 2] << 8) + | |
4587 | ((UV) tmps[off + 3]); | |
a0ed51b3 | 4588 | } |
5637ef5b | 4589 | Perl_croak(aTHX_ "panic: swash_fetch got swatch of unexpected bit width, " |
147e3846 | 4590 | "slen=%" UVuf ", needents=%" UVuf, (UV)slen, (UV)needents); |
670f1322 | 4591 | NORETURN_FUNCTION_END; |
a0ed51b3 | 4592 | } |
2b9d42f0 | 4593 | |
319009ee KW |
4594 | /* Read a single line of the main body of the swash input text. These are of |
4595 | * the form: | |
4596 | * 0053 0056 0073 | |
4597 | * where each number is hex. The first two numbers form the minimum and | |
4598 | * maximum of a range, and the third is the value associated with the range. | |
4599 | * Not all swashes should have a third number | |
4600 | * | |
4601 | * On input: l points to the beginning of the line to be examined; it points | |
4602 | * to somewhere in the string of the whole input text, and is | |
4603 | * terminated by a \n or the null string terminator. | |
4604 | * lend points to the null terminator of that string | |
4605 | * wants_value is non-zero if the swash expects a third number | |
4606 | * typestr is the name of the swash's mapping, like 'ToLower' | |
4607 | * On output: *min, *max, and *val are set to the values read from the line. | |
4608 | * returns a pointer just beyond the line examined. If there was no | |
4609 | * valid min number on the line, returns lend+1 | |
4610 | */ | |
4611 | ||
4612 | STATIC U8* | |
4613 | S_swash_scan_list_line(pTHX_ U8* l, U8* const lend, UV* min, UV* max, UV* val, | |
4614 | const bool wants_value, const U8* const typestr) | |
4615 | { | |
4616 | const int typeto = typestr[0] == 'T' && typestr[1] == 'o'; | |
4617 | STRLEN numlen; /* Length of the number */ | |
02470786 KW |
4618 | I32 flags = PERL_SCAN_SILENT_ILLDIGIT |
4619 | | PERL_SCAN_DISALLOW_PREFIX | |
4620 | | PERL_SCAN_SILENT_NON_PORTABLE; | |
319009ee KW |
4621 | |
4622 | /* nl points to the next \n in the scan */ | |
4623 | U8* const nl = (U8*)memchr(l, '\n', lend - l); | |
4624 | ||
95543e92 KW |
4625 | PERL_ARGS_ASSERT_SWASH_SCAN_LIST_LINE; |
4626 | ||
319009ee KW |
4627 | /* Get the first number on the line: the range minimum */ |
4628 | numlen = lend - l; | |
4629 | *min = grok_hex((char *)l, &numlen, &flags, NULL); | |
c88850db | 4630 | *max = *min; /* So can never return without setting max */ |
319009ee KW |
4631 | if (numlen) /* If found a hex number, position past it */ |
4632 | l += numlen; | |
4633 | else if (nl) { /* Else, go handle next line, if any */ | |
4634 | return nl + 1; /* 1 is length of "\n" */ | |
4635 | } | |
4636 | else { /* Else, no next line */ | |
4637 | return lend + 1; /* to LIST's end at which \n is not found */ | |
4638 | } | |
4639 | ||
4640 | /* The max range value follows, separated by a BLANK */ | |
4641 | if (isBLANK(*l)) { | |
4642 | ++l; | |
02470786 KW |
4643 | flags = PERL_SCAN_SILENT_ILLDIGIT |
4644 | | PERL_SCAN_DISALLOW_PREFIX | |
4645 | | PERL_SCAN_SILENT_NON_PORTABLE; | |
319009ee KW |
4646 | numlen = lend - l; |
4647 | *max = grok_hex((char *)l, &numlen, &flags, NULL); | |
4648 | if (numlen) | |
4649 | l += numlen; | |
4650 | else /* If no value here, it is a single element range */ | |
4651 | *max = *min; | |
4652 | ||
4653 | /* Non-binary tables have a third entry: what the first element of the | |
24303724 | 4654 | * range maps to. The map for those currently read here is in hex */ |
319009ee KW |
4655 | if (wants_value) { |
4656 | if (isBLANK(*l)) { | |
4657 | ++l; | |
f2a7d0fc KW |
4658 | flags = PERL_SCAN_SILENT_ILLDIGIT |
4659 | | PERL_SCAN_DISALLOW_PREFIX | |
4660 | | PERL_SCAN_SILENT_NON_PORTABLE; | |
4661 | numlen = lend - l; | |
4662 | *val = grok_hex((char *)l, &numlen, &flags, NULL); | |
4663 | if (numlen) | |
4664 | l += numlen; | |
4665 | else | |
4666 | *val = 0; | |
319009ee KW |
4667 | } |
4668 | else { | |
4669 | *val = 0; | |
4670 | if (typeto) { | |
dcbac5bb | 4671 | /* diag_listed_as: To%s: illegal mapping '%s' */ |
319009ee KW |
4672 | Perl_croak(aTHX_ "%s: illegal mapping '%s'", |
4673 | typestr, l); | |
4674 | } | |
4675 | } | |
4676 | } | |
4677 | else | |
4678 | *val = 0; /* bits == 1, then any val should be ignored */ | |
4679 | } | |
4680 | else { /* Nothing following range min, should be single element with no | |
4681 | mapping expected */ | |
319009ee KW |
4682 | if (wants_value) { |
4683 | *val = 0; | |
4684 | if (typeto) { | |
dcbac5bb | 4685 | /* diag_listed_as: To%s: illegal mapping '%s' */ |
319009ee KW |
4686 | Perl_croak(aTHX_ "%s: illegal mapping '%s'", typestr, l); |
4687 | } | |
4688 | } | |
4689 | else | |
4690 | *val = 0; /* bits == 1, then val should be ignored */ | |
4691 | } | |
4692 | ||
4693 | /* Position to next line if any, or EOF */ | |
4694 | if (nl) | |
4695 | l = nl + 1; | |
4696 | else | |
4697 | l = lend; | |
4698 | ||
4699 | return l; | |
4700 | } | |
4701 | ||
979f2922 TS |
4702 | /* Note: |
4703 | * Returns a swatch (a bit vector string) for a code point sequence | |
4704 | * that starts from the value C<start> and comprises the number C<span>. | |
4705 | * A C<swash> must be an object created by SWASHNEW (see lib/utf8_heavy.pl). | |
4706 | * Should be used via swash_fetch, which will cache the swatch in C<swash>. | |
4707 | */ | |
4708 | STATIC SV* | |
b0e3252e | 4709 | S_swatch_get(pTHX_ SV* swash, UV start, UV span) |
979f2922 TS |
4710 | { |
4711 | SV *swatch; | |
4c404f26 | 4712 | U8 *l, *lend, *x, *xend, *s; |
979f2922 | 4713 | STRLEN lcur, xcur, scur; |
ef8f7699 | 4714 | HV *const hv = MUTABLE_HV(SvRV(swash)); |
36eb48b4 | 4715 | |
88d45d28 KW |
4716 | SV** listsvp = NULL; /* The string containing the main body of the table */ |
4717 | SV** extssvp = NULL; | |
88d45d28 | 4718 | U8* typestr = NULL; |
4c404f26 | 4719 | STRLEN bits = 0; |
786861f5 KW |
4720 | STRLEN octets; /* if bits == 1, then octets == 0 */ |
4721 | UV none; | |
4722 | UV end = start + span; | |
972dd592 | 4723 | |
786861f5 KW |
4724 | SV** const bitssvp = hv_fetchs(hv, "BITS", FALSE); |
4725 | SV** const nonesvp = hv_fetchs(hv, "NONE", FALSE); | |
4726 | SV** const typesvp = hv_fetchs(hv, "TYPE", FALSE); | |
4727 | extssvp = hv_fetchs(hv, "EXTRAS", FALSE); | |
4728 | listsvp = hv_fetchs(hv, "LIST", FALSE); | |
786861f5 KW |
4729 | |
4730 | bits = SvUV(*bitssvp); | |
4731 | none = SvUV(*nonesvp); | |
4732 | typestr = (U8*)SvPV_nolen(*typesvp); | |
786861f5 | 4733 | octets = bits >> 3; /* if bits == 1, then octets == 0 */ |
979f2922 | 4734 | |
b0e3252e | 4735 | PERL_ARGS_ASSERT_SWATCH_GET; |
7918f24d | 4736 | |
4c404f26 | 4737 | if (bits != 8 && bits != 16 && bits != 32) { |
147e3846 | 4738 | Perl_croak(aTHX_ "panic: swatch_get doesn't expect bits %" UVuf, |
660a4616 | 4739 | (UV)bits); |
979f2922 TS |
4740 | } |
4741 | ||
84ea5ef6 KW |
4742 | /* If overflowed, use the max possible */ |
4743 | if (end < start) { | |
4744 | end = UV_MAX; | |
4745 | span = end - start; | |
4746 | } | |
4747 | ||
979f2922 | 4748 | /* create and initialize $swatch */ |
979f2922 | 4749 | scur = octets ? (span * octets) : (span + 7) / 8; |
e524fe40 NC |
4750 | swatch = newSV(scur); |
4751 | SvPOK_on(swatch); | |
979f2922 TS |
4752 | s = (U8*)SvPVX(swatch); |
4753 | if (octets && none) { | |
0bd48802 | 4754 | const U8* const e = s + scur; |
979f2922 TS |
4755 | while (s < e) { |
4756 | if (bits == 8) | |
4757 | *s++ = (U8)(none & 0xff); | |
4758 | else if (bits == 16) { | |
4759 | *s++ = (U8)((none >> 8) & 0xff); | |
4760 | *s++ = (U8)( none & 0xff); | |
4761 | } | |
4762 | else if (bits == 32) { | |
4763 | *s++ = (U8)((none >> 24) & 0xff); | |
4764 | *s++ = (U8)((none >> 16) & 0xff); | |
4765 | *s++ = (U8)((none >> 8) & 0xff); | |
4766 | *s++ = (U8)( none & 0xff); | |
4767 | } | |
4768 | } | |
4769 | *s = '\0'; | |
4770 | } | |
4771 | else { | |
4772 | (void)memzero((U8*)s, scur + 1); | |
4773 | } | |
4774 | SvCUR_set(swatch, scur); | |
4775 | s = (U8*)SvPVX(swatch); | |
4776 | ||
36eb48b4 | 4777 | /* read $swash->{LIST} */ |
979f2922 TS |
4778 | l = (U8*)SvPV(*listsvp, lcur); |
4779 | lend = l + lcur; | |
4780 | while (l < lend) { | |
4c404f26 | 4781 | UV min = 0, max = 0, val = 0, upper; |
95543e92 KW |
4782 | l = swash_scan_list_line(l, lend, &min, &max, &val, |
4783 | cBOOL(octets), typestr); | |
319009ee | 4784 | if (l > lend) { |
979f2922 TS |
4785 | break; |
4786 | } | |
4787 | ||
972dd592 | 4788 | /* If looking for something beyond this range, go try the next one */ |
979f2922 TS |
4789 | if (max < start) |
4790 | continue; | |
4791 | ||
8ed25d53 KW |
4792 | /* <end> is generally 1 beyond where we want to set things, but at the |
4793 | * platform's infinity, where we can't go any higher, we want to | |
4794 | * include the code point at <end> */ | |
4795 | upper = (max < end) | |
4796 | ? max | |
4797 | : (max != UV_MAX || end != UV_MAX) | |
4798 | ? end - 1 | |
4799 | : end; | |
4800 | ||
979f2922 | 4801 | if (octets) { |
35da51f7 | 4802 | UV key; |
979f2922 TS |
4803 | if (min < start) { |
4804 | if (!none || val < none) { | |
4805 | val += start - min; | |
4806 | } | |
4807 | min = start; | |
4808 | } | |
8ed25d53 | 4809 | for (key = min; key <= upper; key++) { |
979f2922 | 4810 | STRLEN offset; |
979f2922 TS |
4811 | /* offset must be non-negative (start <= min <= key < end) */ |
4812 | offset = octets * (key - start); | |
4813 | if (bits == 8) | |
4814 | s[offset] = (U8)(val & 0xff); | |
4815 | else if (bits == 16) { | |
4816 | s[offset ] = (U8)((val >> 8) & 0xff); | |
4817 | s[offset + 1] = (U8)( val & 0xff); | |
4818 | } | |
4819 | else if (bits == 32) { | |
4820 | s[offset ] = (U8)((val >> 24) & 0xff); | |
4821 | s[offset + 1] = (U8)((val >> 16) & 0xff); | |
4822 | s[offset + 2] = (U8)((val >> 8) & 0xff); | |
4823 | s[offset + 3] = (U8)( val & 0xff); | |
4824 | } | |
4825 | ||
4826 | if (!none || val < none) | |
4827 | ++val; | |
4828 | } | |
4829 | } | |
979f2922 | 4830 | } /* while */ |
979f2922 | 4831 | |
4c404f26 | 4832 | /* read $swash->{EXTRAS} */ |
979f2922 TS |
4833 | x = (U8*)SvPV(*extssvp, xcur); |
4834 | xend = x + xcur; | |
4835 | while (x < xend) { | |
4836 | STRLEN namelen; | |
4837 | U8 *namestr; | |
4838 | SV** othersvp; | |
4839 | HV* otherhv; | |
4840 | STRLEN otherbits; | |
4841 | SV **otherbitssvp, *other; | |
711a919c | 4842 | U8 *s, *o, *nl; |
979f2922 TS |
4843 | STRLEN slen, olen; |
4844 | ||
35da51f7 | 4845 | const U8 opc = *x++; |
979f2922 TS |
4846 | if (opc == '\n') |
4847 | continue; | |
4848 | ||
4849 | nl = (U8*)memchr(x, '\n', xend - x); | |
4850 | ||
4851 | if (opc != '-' && opc != '+' && opc != '!' && opc != '&') { | |
4852 | if (nl) { | |
4853 | x = nl + 1; /* 1 is length of "\n" */ | |
4854 | continue; | |
4855 | } | |
4856 | else { | |
4857 | x = xend; /* to EXTRAS' end at which \n is not found */ | |
4858 | break; | |
4859 | } | |
4860 | } | |
4861 | ||
4862 | namestr = x; | |
4863 | if (nl) { | |
4864 | namelen = nl - namestr; | |
4865 | x = nl + 1; | |
4866 | } | |
4867 | else { | |
4868 | namelen = xend - namestr; | |
4869 | x = xend; | |
4870 | } | |
4871 | ||
4872 | othersvp = hv_fetch(hv, (char *)namestr, namelen, FALSE); | |
ef8f7699 | 4873 | otherhv = MUTABLE_HV(SvRV(*othersvp)); |
017a3ce5 | 4874 | otherbitssvp = hv_fetchs(otherhv, "BITS", FALSE); |
979f2922 TS |
4875 | otherbits = (STRLEN)SvUV(*otherbitssvp); |
4876 | if (bits < otherbits) | |
5637ef5b | 4877 | Perl_croak(aTHX_ "panic: swatch_get found swatch size mismatch, " |
147e3846 | 4878 | "bits=%" UVuf ", otherbits=%" UVuf, (UV)bits, (UV)otherbits); |
979f2922 TS |
4879 | |
4880 | /* The "other" swatch must be destroyed after. */ | |
b0e3252e | 4881 | other = swatch_get(*othersvp, start, span); |
979f2922 TS |
4882 | o = (U8*)SvPV(other, olen); |
4883 | ||
4884 | if (!olen) | |
b0e3252e | 4885 | Perl_croak(aTHX_ "panic: swatch_get got improper swatch"); |
979f2922 TS |
4886 | |
4887 | s = (U8*)SvPV(swatch, slen); | |
4c404f26 | 4888 | { |
979f2922 TS |
4889 | STRLEN otheroctets = otherbits >> 3; |
4890 | STRLEN offset = 0; | |
35da51f7 | 4891 | U8* const send = s + slen; |
979f2922 TS |
4892 | |
4893 | while (s < send) { | |
4894 | UV otherval = 0; | |
4895 | ||
4896 | if (otherbits == 1) { | |
4897 | otherval = (o[offset >> 3] >> (offset & 7)) & 1; | |
4898 | ++offset; | |
4899 | } | |
4900 | else { | |
4901 | STRLEN vlen = otheroctets; | |
4902 | otherval = *o++; | |
4903 | while (--vlen) { | |
4904 | otherval <<= 8; | |
4905 | otherval |= *o++; | |
4906 | } | |
4907 | } | |
4908 | ||
711a919c | 4909 | if (opc == '+' && otherval) |
6f207bd3 | 4910 | NOOP; /* replace with otherval */ |
979f2922 TS |
4911 | else if (opc == '!' && !otherval) |
4912 | otherval = 1; | |
4913 | else if (opc == '-' && otherval) | |
4914 | otherval = 0; | |
4915 | else if (opc == '&' && !otherval) | |
4916 | otherval = 0; | |
4917 | else { | |
711a919c | 4918 | s += octets; /* no replacement */ |
979f2922 TS |
4919 | continue; |
4920 | } | |
4921 | ||
4922 | if (bits == 8) | |
4923 | *s++ = (U8)( otherval & 0xff); | |
4924 | else if (bits == 16) { | |
4925 | *s++ = (U8)((otherval >> 8) & 0xff); | |
4926 | *s++ = (U8)( otherval & 0xff); | |
4927 | } | |
4928 | else if (bits == 32) { | |
4929 | *s++ = (U8)((otherval >> 24) & 0xff); | |
4930 | *s++ = (U8)((otherval >> 16) & 0xff); | |
4931 | *s++ = (U8)((otherval >> 8) & 0xff); | |
4932 | *s++ = (U8)( otherval & 0xff); | |
4933 | } | |
4c404f26 | 4934 | } |
979f2922 TS |
4935 | } |
4936 | sv_free(other); /* through with it! */ | |
4937 | } /* while */ | |
4938 | return swatch; | |
4939 | } | |
4940 | ||
0876b9a0 | 4941 | bool |
5aaab254 | 4942 | Perl_check_utf8_print(pTHX_ const U8* s, const STRLEN len) |
0876b9a0 KW |
4943 | { |
4944 | /* May change: warns if surrogates, non-character code points, or | |
56576a04 KW |
4945 | * non-Unicode code points are in 's' which has length 'len' bytes. |
4946 | * Returns TRUE if none found; FALSE otherwise. The only other validity | |
d22ec717 KW |
4947 | * check is to make sure that this won't exceed the string's length nor |
4948 | * overflow */ | |
0876b9a0 KW |
4949 | |
4950 | const U8* const e = s + len; | |
4951 | bool ok = TRUE; | |
4952 | ||
4953 | PERL_ARGS_ASSERT_CHECK_UTF8_PRINT; | |
4954 | ||
4955 | while (s < e) { | |
4956 | if (UTF8SKIP(s) > len) { | |
4957 | Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), | |
4958 | "%s in %s", unees, PL_op ? OP_DESC(PL_op) : "print"); | |
4959 | return FALSE; | |
4960 | } | |
ac6f1fbe | 4961 | if (UNLIKELY(isUTF8_POSSIBLY_PROBLEMATIC(*s))) { |
f2bf18cc | 4962 | if (UNLIKELY(UTF8_IS_SUPER(s, e))) { |
760c7c2f | 4963 | if ( ckWARN_d(WARN_NON_UNICODE) |
e050c007 KW |
4964 | || UNLIKELY(0 < does_utf8_overflow(s, s + len, |
4965 | 0 /* Don't consider overlongs */ | |
4966 | ))) | |
4967 | { | |
15ca5930 | 4968 | /* A side effect of this function will be to warn */ |
2db24202 | 4969 | (void) utf8n_to_uvchr(s, e - s, NULL, UTF8_WARN_SUPER); |
7ee537e6 KW |
4970 | ok = FALSE; |
4971 | } | |
0876b9a0 | 4972 | } |
f2bf18cc | 4973 | else if (UNLIKELY(UTF8_IS_SURROGATE(s, e))) { |
8457b38f | 4974 | if (ckWARN_d(WARN_SURROGATE)) { |
15ca5930 KW |
4975 | /* This has a different warning than the one the called |
4976 | * function would output, so can't just call it, unlike we | |
4977 | * do for the non-chars and above-unicodes */ | |
2db24202 | 4978 | UV uv = utf8_to_uvchr_buf(s, e, NULL); |
8457b38f | 4979 | Perl_warner(aTHX_ packWARN(WARN_SURROGATE), |
56576a04 KW |
4980 | "Unicode surrogate U+%04" UVXf " is illegal in UTF-8", |
4981 | uv); | |
8457b38f KW |
4982 | ok = FALSE; |
4983 | } | |
0876b9a0 | 4984 | } |
56576a04 KW |
4985 | else if ( UNLIKELY(UTF8_IS_NONCHAR(s, e)) |
4986 | && (ckWARN_d(WARN_NONCHAR))) | |
4987 | { | |
15ca5930 | 4988 | /* A side effect of this function will be to warn */ |
2db24202 | 4989 | (void) utf8n_to_uvchr(s, e - s, NULL, UTF8_WARN_NONCHAR); |
0876b9a0 KW |
4990 | ok = FALSE; |
4991 | } | |
4992 | } | |
4993 | s += UTF8SKIP(s); | |
4994 | } | |
4995 | ||
4996 | return ok; | |
4997 | } | |
4998 | ||
0f830e0b | 4999 | /* |
87cea99e | 5000 | =for apidoc pv_uni_display |
d2cc3551 | 5001 | |
a1433954 KW |
5002 | Build to the scalar C<dsv> a displayable version of the string C<spv>, |
5003 | length C<len>, the displayable version being at most C<pvlim> bytes long | |
796b6530 | 5004 | (if longer, the rest is truncated and C<"..."> will be appended). |
0a2ef054 | 5005 | |
796b6530 KW |
5006 | The C<flags> argument can have C<UNI_DISPLAY_ISPRINT> set to display |
5007 | C<isPRINT()>able characters as themselves, C<UNI_DISPLAY_BACKSLASH> | |
5008 | to display the C<\\[nrfta\\]> as the backslashed versions (like C<"\n">) | |
5009 | (C<UNI_DISPLAY_BACKSLASH> is preferred over C<UNI_DISPLAY_ISPRINT> for C<"\\">). | |
5010 | C<UNI_DISPLAY_QQ> (and its alias C<UNI_DISPLAY_REGEX>) have both | |
5011 | C<UNI_DISPLAY_BACKSLASH> and C<UNI_DISPLAY_ISPRINT> turned on. | |
0a2ef054 | 5012 | |
a1433954 | 5013 | The pointer to the PV of the C<dsv> is returned. |
d2cc3551 | 5014 | |
119bc988 KW |
5015 | See also L</sv_uni_display>. |
5016 | ||
d2cc3551 | 5017 | =cut */ |
e6b2e755 | 5018 | char * |
56576a04 KW |
5019 | Perl_pv_uni_display(pTHX_ SV *dsv, const U8 *spv, STRLEN len, STRLEN pvlim, |
5020 | UV flags) | |
e6b2e755 JH |
5021 | { |
5022 | int truncated = 0; | |
e1ec3a88 | 5023 | const char *s, *e; |
e6b2e755 | 5024 | |
7918f24d NC |
5025 | PERL_ARGS_ASSERT_PV_UNI_DISPLAY; |
5026 | ||
9e2aa2e7 | 5027 | SvPVCLEAR(dsv); |
7fddd944 | 5028 | SvUTF8_off(dsv); |
e1ec3a88 | 5029 | for (s = (const char *)spv, e = s + len; s < e; s += UTF8SKIP(s)) { |
e6b2e755 | 5030 | UV u; |
a49f32c6 NC |
5031 | /* This serves double duty as a flag and a character to print after |
5032 | a \ when flags & UNI_DISPLAY_BACKSLASH is true. | |
5033 | */ | |
5034 | char ok = 0; | |
c728cb41 | 5035 | |
e6b2e755 JH |
5036 | if (pvlim && SvCUR(dsv) >= pvlim) { |
5037 | truncated++; | |
5038 | break; | |
5039 | } | |
4b88fb76 | 5040 | u = utf8_to_uvchr_buf((U8*)s, (U8*)e, 0); |
c728cb41 | 5041 | if (u < 256) { |
a3b680e6 | 5042 | const unsigned char c = (unsigned char)u & 0xFF; |
0bd48802 | 5043 | if (flags & UNI_DISPLAY_BACKSLASH) { |
a49f32c6 | 5044 | switch (c) { |
c728cb41 | 5045 | case '\n': |
a49f32c6 | 5046 | ok = 'n'; break; |
c728cb41 | 5047 | case '\r': |
a49f32c6 | 5048 | ok = 'r'; break; |
c728cb41 | 5049 | case '\t': |
a49f32c6 | 5050 | ok = 't'; break; |
c728cb41 | 5051 | case '\f': |
a49f32c6 | 5052 | ok = 'f'; break; |
c728cb41 | 5053 | case '\a': |
a49f32c6 | 5054 | ok = 'a'; break; |
c728cb41 | 5055 | case '\\': |
a49f32c6 | 5056 | ok = '\\'; break; |
c728cb41 JH |
5057 | default: break; |
5058 | } | |
a49f32c6 | 5059 | if (ok) { |
88c9ea1e | 5060 | const char string = ok; |
76f68e9b | 5061 | sv_catpvs(dsv, "\\"); |
5e7aa789 | 5062 | sv_catpvn(dsv, &string, 1); |
a49f32c6 | 5063 | } |
c728cb41 | 5064 | } |
00e86452 | 5065 | /* isPRINT() is the locale-blind version. */ |
a49f32c6 | 5066 | if (!ok && (flags & UNI_DISPLAY_ISPRINT) && isPRINT(c)) { |
88c9ea1e | 5067 | const char string = c; |
5e7aa789 | 5068 | sv_catpvn(dsv, &string, 1); |
a49f32c6 | 5069 | ok = 1; |
0a2ef054 | 5070 | } |
c728cb41 JH |
5071 | } |
5072 | if (!ok) | |
147e3846 | 5073 | Perl_sv_catpvf(aTHX_ dsv, "\\x{%" UVxf "}", u); |
e6b2e755 JH |
5074 | } |
5075 | if (truncated) | |
396482e1 | 5076 | sv_catpvs(dsv, "..."); |
48ef279e | 5077 | |
e6b2e755 JH |
5078 | return SvPVX(dsv); |
5079 | } | |
2b9d42f0 | 5080 | |
d2cc3551 | 5081 | /* |
87cea99e | 5082 | =for apidoc sv_uni_display |
d2cc3551 | 5083 | |
a1433954 KW |
5084 | Build to the scalar C<dsv> a displayable version of the scalar C<sv>, |
5085 | the displayable version being at most C<pvlim> bytes long | |
d2cc3551 | 5086 | (if longer, the rest is truncated and "..." will be appended). |
0a2ef054 | 5087 | |
a1433954 | 5088 | The C<flags> argument is as in L</pv_uni_display>(). |
0a2ef054 | 5089 | |
a1433954 | 5090 | The pointer to the PV of the C<dsv> is returned. |
d2cc3551 | 5091 | |
d4c19fe8 AL |
5092 | =cut |
5093 | */ | |
e6b2e755 JH |
5094 | char * |
5095 | Perl_sv_uni_display(pTHX_ SV *dsv, SV *ssv, STRLEN pvlim, UV flags) | |
5096 | { | |
8cdde9f8 NC |
5097 | const char * const ptr = |
5098 | isREGEXP(ssv) ? RX_WRAPPED((REGEXP*)ssv) : SvPVX_const(ssv); | |
5099 | ||
7918f24d NC |
5100 | PERL_ARGS_ASSERT_SV_UNI_DISPLAY; |
5101 | ||
8cdde9f8 | 5102 | return Perl_pv_uni_display(aTHX_ dsv, (const U8*)ptr, |
cfd0369c | 5103 | SvCUR(ssv), pvlim, flags); |
701a277b JH |
5104 | } |
5105 | ||
d2cc3551 | 5106 | /* |
e6226b18 | 5107 | =for apidoc foldEQ_utf8 |
d2cc3551 | 5108 | |
56576a04 KW |
5109 | Returns true if the leading portions of the strings C<s1> and C<s2> (either or |
5110 | both of which may be in UTF-8) are the same case-insensitively; false | |
5111 | otherwise. How far into the strings to compare is determined by other input | |
5112 | parameters. | |
8b35872c | 5113 | |
a1433954 | 5114 | If C<u1> is true, the string C<s1> is assumed to be in UTF-8-encoded Unicode; |
56576a04 KW |
5115 | otherwise it is assumed to be in native 8-bit encoding. Correspondingly for |
5116 | C<u2> with respect to C<s2>. | |
5117 | ||
5118 | If the byte length C<l1> is non-zero, it says how far into C<s1> to check for | |
5119 | fold equality. In other words, C<s1>+C<l1> will be used as a goal to reach. | |
5120 | The scan will not be considered to be a match unless the goal is reached, and | |
5121 | scanning won't continue past that goal. Correspondingly for C<l2> with respect | |
5122 | to C<s2>. | |
5123 | ||
5124 | If C<pe1> is non-C<NULL> and the pointer it points to is not C<NULL>, that | |
5125 | pointer is considered an end pointer to the position 1 byte past the maximum | |
5126 | point in C<s1> beyond which scanning will not continue under any circumstances. | |
03bb5c85 | 5127 | (This routine assumes that UTF-8 encoded input strings are not malformed; |
56576a04 KW |
5128 | malformed input can cause it to read past C<pe1>). This means that if both |
5129 | C<l1> and C<pe1> are specified, and C<pe1> is less than C<s1>+C<l1>, the match | |
5130 | will never be successful because it can never | |
d51c1b21 | 5131 | get as far as its goal (and in fact is asserted against). Correspondingly for |
a1433954 | 5132 | C<pe2> with respect to C<s2>. |
8b35872c | 5133 | |
a1433954 KW |
5134 | At least one of C<s1> and C<s2> must have a goal (at least one of C<l1> and |
5135 | C<l2> must be non-zero), and if both do, both have to be | |
8b35872c KW |
5136 | reached for a successful match. Also, if the fold of a character is multiple |
5137 | characters, all of them must be matched (see tr21 reference below for | |
5138 | 'folding'). | |
5139 | ||
796b6530 | 5140 | Upon a successful match, if C<pe1> is non-C<NULL>, |
a1433954 KW |
5141 | it will be set to point to the beginning of the I<next> character of C<s1> |
5142 | beyond what was matched. Correspondingly for C<pe2> and C<s2>. | |
d2cc3551 JH |
5143 | |
5144 | For case-insensitiveness, the "casefolding" of Unicode is used | |
5145 | instead of upper/lowercasing both the characters, see | |
a1433954 | 5146 | L<http://www.unicode.org/unicode/reports/tr21/> (Case Mappings). |
d2cc3551 JH |
5147 | |
5148 | =cut */ | |
a33c29bc KW |
5149 | |
5150 | /* A flags parameter has been added which may change, and hence isn't | |
5151 | * externally documented. Currently it is: | |
5152 | * 0 for as-documented above | |
5153 | * FOLDEQ_UTF8_NOMIX_ASCII meaning that if a non-ASCII character folds to an | |
5154 | ASCII one, to not match | |
31f05a37 KW |
5155 | * FOLDEQ_LOCALE is set iff the rules from the current underlying |
5156 | * locale are to be used. | |
5157 | * FOLDEQ_S1_ALREADY_FOLDED s1 has already been folded before calling this | |
aa8ebe62 KW |
5158 | * routine. This allows that step to be skipped. |
5159 | * Currently, this requires s1 to be encoded as UTF-8 | |
5160 | * (u1 must be true), which is asserted for. | |
d635b710 KW |
5161 | * FOLDEQ_S1_FOLDS_SANE With either NOMIX_ASCII or LOCALE, no folds may |
5162 | * cross certain boundaries. Hence, the caller should | |
5163 | * let this function do the folding instead of | |
5164 | * pre-folding. This code contains an assertion to | |
5165 | * that effect. However, if the caller knows what | |
5166 | * it's doing, it can pass this flag to indicate that, | |
5167 | * and the assertion is skipped. | |
b4408913 KW |
5168 | * FOLDEQ_S2_ALREADY_FOLDED Similar to FOLDEQ_S1_ALREADY_FOLDED, but applies |
5169 | * to s2, and s2 doesn't have to be UTF-8 encoded. | |
5170 | * This introduces an asymmetry to save a few branches | |
5171 | * in a loop. Currently, this is not a problem, as | |
5172 | * never are both inputs pre-folded. Simply call this | |
5173 | * function with the pre-folded one as the second | |
5174 | * string. | |
d635b710 | 5175 | * FOLDEQ_S2_FOLDS_SANE |
a33c29bc | 5176 | */ |
701a277b | 5177 | I32 |
56576a04 KW |
5178 | Perl_foldEQ_utf8_flags(pTHX_ const char *s1, char **pe1, UV l1, bool u1, |
5179 | const char *s2, char **pe2, UV l2, bool u2, | |
5180 | U32 flags) | |
332ddc25 | 5181 | { |
eb578fdb KW |
5182 | const U8 *p1 = (const U8*)s1; /* Point to current char */ |
5183 | const U8 *p2 = (const U8*)s2; | |
5184 | const U8 *g1 = NULL; /* goal for s1 */ | |
5185 | const U8 *g2 = NULL; | |
5186 | const U8 *e1 = NULL; /* Don't scan s1 past this */ | |
5187 | U8 *f1 = NULL; /* Point to current folded */ | |
5188 | const U8 *e2 = NULL; | |
5189 | U8 *f2 = NULL; | |
48ef279e | 5190 | STRLEN n1 = 0, n2 = 0; /* Number of bytes in current char */ |
8b35872c KW |
5191 | U8 foldbuf1[UTF8_MAXBYTES_CASE+1]; |
5192 | U8 foldbuf2[UTF8_MAXBYTES_CASE+1]; | |
1d39b2cd | 5193 | U8 flags_for_folder = FOLD_FLAGS_FULL; |
8b35872c | 5194 | |
eda9cac1 | 5195 | PERL_ARGS_ASSERT_FOLDEQ_UTF8_FLAGS; |
8b35872c | 5196 | |
68a23e40 KW |
5197 | assert( ! ( (flags & (FOLDEQ_UTF8_NOMIX_ASCII | FOLDEQ_LOCALE)) |
5198 | && (( (flags & FOLDEQ_S1_ALREADY_FOLDED) | |
5199 | && !(flags & FOLDEQ_S1_FOLDS_SANE)) | |
5200 | || ( (flags & FOLDEQ_S2_ALREADY_FOLDED) | |
5201 | && !(flags & FOLDEQ_S2_FOLDS_SANE))))); | |
b08f1bd5 KW |
5202 | /* The algorithm is to trial the folds without regard to the flags on |
5203 | * the first line of the above assert(), and then see if the result | |
5204 | * violates them. This means that the inputs can't be pre-folded to a | |
5205 | * violating result, hence the assert. This could be changed, with the | |
5206 | * addition of extra tests here for the already-folded case, which would | |
5207 | * slow it down. That cost is more than any possible gain for when these | |
5208 | * flags are specified, as the flags indicate /il or /iaa matching which | |
5209 | * is less common than /iu, and I (khw) also believe that real-world /il | |
5210 | * and /iaa matches are most likely to involve code points 0-255, and this | |
5211 | * function only under rare conditions gets called for 0-255. */ | |
18f762c3 | 5212 | |
1d39b2cd KW |
5213 | if (flags & FOLDEQ_LOCALE) { |
5214 | if (IN_UTF8_CTYPE_LOCALE) { | |
35b8412f KW |
5215 | if (UNLIKELY(PL_in_utf8_turkic_locale)) { |
5216 | flags_for_folder |= FOLD_FLAGS_LOCALE; | |
5217 | } | |
5218 | else { | |
5219 | flags &= ~FOLDEQ_LOCALE; | |
5220 | } | |
1d39b2cd KW |
5221 | } |
5222 | else { | |
5223 | flags_for_folder |= FOLD_FLAGS_LOCALE; | |
5224 | } | |
31f05a37 | 5225 | } |
cfd23983 KW |
5226 | if (flags & FOLDEQ_UTF8_NOMIX_ASCII) { |
5227 | flags_for_folder |= FOLD_FLAGS_NOMIX_ASCII; | |
5228 | } | |
31f05a37 | 5229 | |
8b35872c | 5230 | if (pe1) { |
48ef279e | 5231 | e1 = *(U8**)pe1; |
8b35872c KW |
5232 | } |
5233 | ||
5234 | if (l1) { | |
48ef279e | 5235 | g1 = (const U8*)s1 + l1; |
8b35872c KW |
5236 | } |
5237 | ||
5238 | if (pe2) { | |
48ef279e | 5239 | e2 = *(U8**)pe2; |
8b35872c KW |
5240 | } |
5241 | ||
5242 | if (l2) { | |
48ef279e | 5243 | g2 = (const U8*)s2 + l2; |
8b35872c KW |
5244 | } |
5245 | ||
5246 | /* Must have at least one goal */ | |
5247 | assert(g1 || g2); | |
5248 | ||
5249 | if (g1) { | |
5250 | ||
48ef279e KW |
5251 | /* Will never match if goal is out-of-bounds */ |
5252 | assert(! e1 || e1 >= g1); | |
8b35872c | 5253 | |
48ef279e KW |
5254 | /* Here, there isn't an end pointer, or it is beyond the goal. We |
5255 | * only go as far as the goal */ | |
5256 | e1 = g1; | |
8b35872c | 5257 | } |
313b38e5 NC |
5258 | else { |
5259 | assert(e1); /* Must have an end for looking at s1 */ | |
5260 | } | |
8b35872c KW |
5261 | |
5262 | /* Same for goal for s2 */ | |
5263 | if (g2) { | |
48ef279e KW |
5264 | assert(! e2 || e2 >= g2); |
5265 | e2 = g2; | |
8b35872c | 5266 | } |
313b38e5 NC |
5267 | else { |
5268 | assert(e2); | |
5269 | } | |
8b35872c | 5270 | |
18f762c3 KW |
5271 | /* If both operands are already folded, we could just do a memEQ on the |
5272 | * whole strings at once, but it would be better if the caller realized | |
5273 | * this and didn't even call us */ | |
5274 | ||
8b35872c KW |
5275 | /* Look through both strings, a character at a time */ |
5276 | while (p1 < e1 && p2 < e2) { | |
5277 | ||
d51c1b21 | 5278 | /* If at the beginning of a new character in s1, get its fold to use |
1d39b2cd | 5279 | * and the length of the fold. */ |
48ef279e | 5280 | if (n1 == 0) { |
18f762c3 KW |
5281 | if (flags & FOLDEQ_S1_ALREADY_FOLDED) { |
5282 | f1 = (U8 *) p1; | |
aa8ebe62 | 5283 | assert(u1); |
18f762c3 | 5284 | n1 = UTF8SKIP(f1); |
18f762c3 KW |
5285 | } |
5286 | else { | |
1d39b2cd KW |
5287 | if (isASCII(*p1) && ! (flags & FOLDEQ_LOCALE)) { |
5288 | ||
5289 | /* We have to forbid mixing ASCII with non-ASCII if the | |
5290 | * flags so indicate. And, we can short circuit having to | |
5291 | * call the general functions for this common ASCII case, | |
5292 | * all of whose non-locale folds are also ASCII, and hence | |
5293 | * UTF-8 invariants, so the UTF8ness of the strings is not | |
5294 | * relevant. */ | |
5295 | if ((flags & FOLDEQ_UTF8_NOMIX_ASCII) && ! isASCII(*p2)) { | |
5296 | return 0; | |
5297 | } | |
5298 | n1 = 1; | |
5299 | *foldbuf1 = toFOLD(*p1); | |
5300 | } | |
5301 | else if (u1) { | |
a1a5ec35 | 5302 | _toFOLD_utf8_flags(p1, e1, foldbuf1, &n1, flags_for_folder); |
1d39b2cd | 5303 | } |
4a4088c4 | 5304 | else { /* Not UTF-8, get UTF-8 fold */ |
1d39b2cd KW |
5305 | _to_uni_fold_flags(*p1, foldbuf1, &n1, flags_for_folder); |
5306 | } | |
5307 | f1 = foldbuf1; | |
5308 | } | |
48ef279e | 5309 | } |
8b35872c | 5310 | |
48ef279e | 5311 | if (n2 == 0) { /* Same for s2 */ |
18f762c3 | 5312 | if (flags & FOLDEQ_S2_ALREADY_FOLDED) { |
b4408913 KW |
5313 | |
5314 | /* Point to the already-folded character. But for non-UTF-8 | |
5315 | * variants, convert to UTF-8 for the algorithm below */ | |
5316 | if (UTF8_IS_INVARIANT(*p2)) { | |
5317 | f2 = (U8 *) p2; | |
5318 | n2 = 1; | |
5319 | } | |
5320 | else if (u2) { | |
5321 | f2 = (U8 *) p2; | |
5322 | n2 = UTF8SKIP(f2); | |
5323 | } | |
5324 | else { | |
5325 | foldbuf2[0] = UTF8_EIGHT_BIT_HI(*p2); | |
5326 | foldbuf2[1] = UTF8_EIGHT_BIT_LO(*p2); | |
5327 | f2 = foldbuf2; | |
5328 | n2 = 2; | |
5329 | } | |
18f762c3 KW |
5330 | } |
5331 | else { | |
1d39b2cd KW |
5332 | if (isASCII(*p2) && ! (flags & FOLDEQ_LOCALE)) { |
5333 | if ((flags & FOLDEQ_UTF8_NOMIX_ASCII) && ! isASCII(*p1)) { | |
5334 | return 0; | |
5335 | } | |
5336 | n2 = 1; | |
5337 | *foldbuf2 = toFOLD(*p2); | |
5338 | } | |
5339 | else if (u2) { | |
a1a5ec35 | 5340 | _toFOLD_utf8_flags(p2, e2, foldbuf2, &n2, flags_for_folder); |
1d39b2cd KW |
5341 | } |
5342 | else { | |
5343 | _to_uni_fold_flags(*p2, foldbuf2, &n2, flags_for_folder); | |
5344 | } | |
5345 | f2 = foldbuf2; | |
18f762c3 | 5346 | } |
48ef279e | 5347 | } |
8b35872c | 5348 | |
5001101e | 5349 | /* Here f1 and f2 point to the beginning of the strings to compare. |
227968da | 5350 | * These strings are the folds of the next character from each input |
4a4088c4 | 5351 | * string, stored in UTF-8. */ |
5e64d0fa | 5352 | |
48ef279e KW |
5353 | /* While there is more to look for in both folds, see if they |
5354 | * continue to match */ | |
5355 | while (n1 && n2) { | |
5356 | U8 fold_length = UTF8SKIP(f1); | |
5357 | if (fold_length != UTF8SKIP(f2) | |
5358 | || (fold_length == 1 && *f1 != *f2) /* Short circuit memNE | |
5359 | function call for single | |
a6d5f321 | 5360 | byte */ |
48ef279e KW |
5361 | || memNE((char*)f1, (char*)f2, fold_length)) |
5362 | { | |
e6226b18 | 5363 | return 0; /* mismatch */ |
48ef279e KW |
5364 | } |
5365 | ||
5366 | /* Here, they matched, advance past them */ | |
5367 | n1 -= fold_length; | |
5368 | f1 += fold_length; | |
5369 | n2 -= fold_length; | |
5370 | f2 += fold_length; | |
5371 | } | |
8b35872c | 5372 | |
48ef279e KW |
5373 | /* When reach the end of any fold, advance the input past it */ |
5374 | if (n1 == 0) { | |
5375 | p1 += u1 ? UTF8SKIP(p1) : 1; | |
5376 | } | |
5377 | if (n2 == 0) { | |
5378 | p2 += u2 ? UTF8SKIP(p2) : 1; | |
5379 | } | |
8b35872c KW |
5380 | } /* End of loop through both strings */ |
5381 | ||
5382 | /* A match is defined by each scan that specified an explicit length | |
5383 | * reaching its final goal, and the other not having matched a partial | |
5384 | * character (which can happen when the fold of a character is more than one | |
5385 | * character). */ | |
5386 | if (! ((g1 == 0 || p1 == g1) && (g2 == 0 || p2 == g2)) || n1 || n2) { | |
e6226b18 | 5387 | return 0; |
8b35872c KW |
5388 | } |
5389 | ||
5390 | /* Successful match. Set output pointers */ | |
5391 | if (pe1) { | |
48ef279e | 5392 | *pe1 = (char*)p1; |
8b35872c KW |
5393 | } |
5394 | if (pe2) { | |
48ef279e | 5395 | *pe2 = (char*)p2; |
8b35872c | 5396 | } |
e6226b18 | 5397 | return 1; |
e6b2e755 | 5398 | } |
701a277b | 5399 | |
f2645549 | 5400 | /* XXX The next two functions should likely be moved to mathoms.c once all |
37e7596b KW |
5401 | * occurrences of them are removed from the core; some cpan-upstream modules |
5402 | * still use them */ | |
5403 | ||
5404 | U8 * | |
5405 | Perl_uvuni_to_utf8(pTHX_ U8 *d, UV uv) | |
5406 | { | |
5407 | PERL_ARGS_ASSERT_UVUNI_TO_UTF8; | |
5408 | ||
33f38593 | 5409 | return uvoffuni_to_utf8_flags(d, uv, 0); |
37e7596b KW |
5410 | } |
5411 | ||
e505af10 KW |
5412 | /* |
5413 | =for apidoc utf8n_to_uvuni | |
5414 | ||
5415 | Instead use L</utf8_to_uvchr_buf>, or rarely, L</utf8n_to_uvchr>. | |
5416 | ||
5417 | This function was useful for code that wanted to handle both EBCDIC and | |
5418 | ASCII platforms with Unicode properties, but starting in Perl v5.20, the | |
5419 | distinctions between the platforms have mostly been made invisible to most | |
5420 | code, so this function is quite unlikely to be what you want. If you do need | |
5421 | this precise functionality, use instead | |
5422 | C<L<NATIVE_TO_UNI(utf8_to_uvchr_buf(...))|/utf8_to_uvchr_buf>> | |
5423 | or C<L<NATIVE_TO_UNI(utf8n_to_uvchr(...))|/utf8n_to_uvchr>>. | |
5424 | ||
5425 | =cut | |
5426 | */ | |
5427 | ||
37e7596b KW |
5428 | UV |
5429 | Perl_utf8n_to_uvuni(pTHX_ const U8 *s, STRLEN curlen, STRLEN *retlen, U32 flags) | |
5430 | { | |
5431 | PERL_ARGS_ASSERT_UTF8N_TO_UVUNI; | |
5432 | ||
5433 | return NATIVE_TO_UNI(utf8n_to_uvchr(s, curlen, retlen, flags)); | |
5434 | } | |
5435 | ||
5436 | /* | |
5437 | =for apidoc uvuni_to_utf8_flags | |
5438 | ||
5439 | Instead you almost certainly want to use L</uvchr_to_utf8> or | |
efa9cd84 | 5440 | L</uvchr_to_utf8_flags>. |
37e7596b KW |
5441 | |
5442 | This function is a deprecated synonym for L</uvoffuni_to_utf8_flags>, | |
5443 | which itself, while not deprecated, should be used only in isolated | |
5444 | circumstances. These functions were useful for code that wanted to handle | |
5445 | both EBCDIC and ASCII platforms with Unicode properties, but starting in Perl | |
5446 | v5.20, the distinctions between the platforms have mostly been made invisible | |
5447 | to most code, so this function is quite unlikely to be what you want. | |
5448 | ||
5449 | =cut | |
5450 | */ | |
5451 | ||
5452 | U8 * | |
5453 | Perl_uvuni_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags) | |
5454 | { | |
5455 | PERL_ARGS_ASSERT_UVUNI_TO_UTF8_FLAGS; | |
5456 | ||
5457 | return uvoffuni_to_utf8_flags(d, uv, flags); | |
5458 | } | |
5459 | ||
5460 | /* | |
7723e007 KW |
5461 | =for apidoc utf8_to_uvchr |
5462 | ||
5463 | Returns the native code point of the first character in the string C<s> | |
5464 | which is assumed to be in UTF-8 encoding; C<retlen> will be set to the | |
5465 | length, in bytes, of that character. | |
5466 | ||
5467 | Some, but not all, UTF-8 malformations are detected, and in fact, some | |
5468 | malformed input could cause reading beyond the end of the input buffer, which | |
5469 | is why this function is deprecated. Use L</utf8_to_uvchr_buf> instead. | |
5470 | ||
5471 | If C<s> points to one of the detected malformations, and UTF8 warnings are | |
5472 | enabled, zero is returned and C<*retlen> is set (if C<retlen> isn't | |
5473 | C<NULL>) to -1. If those warnings are off, the computed value if well-defined (or | |
5474 | the Unicode REPLACEMENT CHARACTER, if not) is silently returned, and C<*retlen> | |
5475 | is set (if C<retlen> isn't NULL) so that (S<C<s> + C<*retlen>>) is the | |
5476 | next possible position in C<s> that could begin a non-malformed character. | |
5477 | See L</utf8n_to_uvchr> for details on when the REPLACEMENT CHARACTER is returned. | |
5478 | ||
5479 | =cut | |
5480 | */ | |
5481 | ||
5482 | UV | |
5483 | Perl_utf8_to_uvchr(pTHX_ const U8 *s, STRLEN *retlen) | |
5484 | { | |
5485 | PERL_ARGS_ASSERT_UTF8_TO_UVCHR; | |
5486 | ||
aa3c16bd KW |
5487 | /* This function is unsafe if malformed UTF-8 input is given it, which is |
5488 | * why the function is deprecated. If the first byte of the input | |
5489 | * indicates that there are more bytes remaining in the sequence that forms | |
5490 | * the character than there are in the input buffer, it can read past the | |
5491 | * end. But we can make it safe if the input string happens to be | |
5492 | * NUL-terminated, as many strings in Perl are, by refusing to read past a | |
5493 | * NUL. A NUL indicates the start of the next character anyway. If the | |
5494 | * input isn't NUL-terminated, the function remains unsafe, as it always | |
5495 | * has been. | |
5496 | * | |
5497 | * An initial NUL has to be handled separately, but all ASCIIs can be | |
5498 | * handled the same way, speeding up this common case */ | |
5499 | ||
5500 | if (UTF8_IS_INVARIANT(*s)) { /* Assumes 's' contains at least 1 byte */ | |
b7502288 KW |
5501 | if (retlen) { |
5502 | *retlen = 1; | |
5503 | } | |
aa3c16bd KW |
5504 | return (UV) *s; |
5505 | } | |
5506 | ||
5507 | return utf8_to_uvchr_buf(s, | |
2951abb4 KW |
5508 | s + my_strnlen((char *) s, UTF8SKIP(s)), |
5509 | retlen); | |
7723e007 KW |
5510 | } |
5511 | ||
5512 | /* | |
14d04a33 | 5513 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 5514 | */ |