Commit | Line | Data |
---|---|---|
a0ed51b3 LW |
1 | /* utf8.c |
2 | * | |
2c351e65 NC |
3 | * Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, |
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 | /* | |
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 | * | |
16 | * 'Well do I understand your speech,' he answered in the same language; | |
17 | * 'yet few strangers do so. Why then do you not speak in the Common Tongue, | |
18 | * as is the custom in the West, if you wish to be answered?' | |
19 | * | |
20 | * ...the travellers perceived that the floor was paved with stones of many | |
21 | * hues; branching runes and strange devices intertwined beneath their feet. | |
22 | */ | |
23 | ||
24 | #include "EXTERN.h" | |
864dbfa3 | 25 | #define PERL_IN_UTF8_C |
a0ed51b3 LW |
26 | #include "perl.h" |
27 | ||
0bfdb59a NC |
28 | #ifndef EBCDIC |
29 | /* Separate prototypes needed because in ASCII systems these | |
30 | * usually macros but they still are compiled as code, too. */ | |
31 | PERL_CALLCONV UV Perl_utf8n_to_uvchr(pTHX_ U8 *s, STRLEN curlen, STRLEN *retlen, U32 flags); | |
32 | PERL_CALLCONV U8* Perl_uvchr_to_utf8(pTHX_ U8 *d, UV uv); | |
33 | #endif | |
34 | ||
fe20fd30 JH |
35 | static const char unees[] = |
36 | "Malformed UTF-8 character (unexpected end of string)"; | |
901b21bf | 37 | |
ccfc67b7 JH |
38 | /* |
39 | =head1 Unicode Support | |
a0ed51b3 | 40 | |
40d34c0d SB |
41 | This file contains various utility functions for manipulating UTF8-encoded |
42 | strings. For the uninitiated, this is a method of representing arbitrary | |
43 | Unicode characters as a variable number of bytes, in such a way that | |
44 | characters in the ASCII range are unmodified, and a zero byte never appears | |
45 | within non-zero characters. | |
46 | ||
b851fbc1 | 47 | =for apidoc A|U8 *|uvuni_to_utf8_flags|U8 *d|UV uv|UV flags |
eebe1485 | 48 | |
cd458e05 | 49 | Adds the UTF-8 representation of the Unicode codepoint C<uv> to the end |
a2a469f9 | 50 | of the string C<d>; C<d> should be have at least C<UTF8_MAXBYTES+1> free |
eebe1485 | 51 | bytes available. The return value is the pointer to the byte after the |
9041c2e3 | 52 | end of the new character. In other words, |
eebe1485 | 53 | |
b851fbc1 JH |
54 | d = uvuni_to_utf8_flags(d, uv, flags); |
55 | ||
56 | or, in most cases, | |
57 | ||
9041c2e3 | 58 | d = uvuni_to_utf8(d, uv); |
eebe1485 | 59 | |
b851fbc1 JH |
60 | (which is equivalent to) |
61 | ||
62 | d = uvuni_to_utf8_flags(d, uv, 0); | |
63 | ||
eebe1485 SC |
64 | is the recommended Unicode-aware way of saying |
65 | ||
66 | *(d++) = uv; | |
67 | ||
68 | =cut | |
69 | */ | |
70 | ||
dfe13c55 | 71 | U8 * |
b851fbc1 | 72 | Perl_uvuni_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags) |
a0ed51b3 | 73 | { |
62961d2e | 74 | if (ckWARN(WARN_UTF8)) { |
b851fbc1 JH |
75 | if (UNICODE_IS_SURROGATE(uv) && |
76 | !(flags & UNICODE_ALLOW_SURROGATE)) | |
9014280d | 77 | Perl_warner(aTHX_ packWARN(WARN_UTF8), "UTF-16 surrogate 0x%04"UVxf, uv); |
b851fbc1 JH |
78 | else if ( |
79 | ((uv >= 0xFDD0 && uv <= 0xFDEF && | |
80 | !(flags & UNICODE_ALLOW_FDD0)) | |
81 | || | |
c867b360 | 82 | ((uv & 0xFFFE) == 0xFFFE && /* Either FFFE or FFFF. */ |
b851fbc1 JH |
83 | !(flags & UNICODE_ALLOW_FFFF))) && |
84 | /* UNICODE_ALLOW_SUPER includes | |
2a20b9da | 85 | * FFFEs and FFFFs beyond 0x10FFFF. */ |
b851fbc1 JH |
86 | ((uv <= PERL_UNICODE_MAX) || |
87 | !(flags & UNICODE_ALLOW_SUPER)) | |
88 | ) | |
9014280d | 89 | Perl_warner(aTHX_ packWARN(WARN_UTF8), |
507b9800 JH |
90 | "Unicode character 0x%04"UVxf" is illegal", uv); |
91 | } | |
c4d5f83a | 92 | if (UNI_IS_INVARIANT(uv)) { |
eb160463 | 93 | *d++ = (U8)UTF_TO_NATIVE(uv); |
a0ed51b3 LW |
94 | return d; |
95 | } | |
2d331972 | 96 | #if defined(EBCDIC) |
1d72bdf6 NIS |
97 | else { |
98 | STRLEN len = UNISKIP(uv); | |
99 | U8 *p = d+len-1; | |
100 | while (p > d) { | |
eb160463 | 101 | *p-- = (U8)UTF_TO_NATIVE((uv & UTF_CONTINUATION_MASK) | UTF_CONTINUATION_MARK); |
1d72bdf6 NIS |
102 | uv >>= UTF_ACCUMULATION_SHIFT; |
103 | } | |
eb160463 | 104 | *p = (U8)UTF_TO_NATIVE((uv & UTF_START_MASK(len)) | UTF_START_MARK(len)); |
1d72bdf6 NIS |
105 | return d+len; |
106 | } | |
107 | #else /* Non loop style */ | |
a0ed51b3 | 108 | if (uv < 0x800) { |
eb160463 GS |
109 | *d++ = (U8)(( uv >> 6) | 0xc0); |
110 | *d++ = (U8)(( uv & 0x3f) | 0x80); | |
a0ed51b3 LW |
111 | return d; |
112 | } | |
113 | if (uv < 0x10000) { | |
eb160463 GS |
114 | *d++ = (U8)(( uv >> 12) | 0xe0); |
115 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); | |
116 | *d++ = (U8)(( uv & 0x3f) | 0x80); | |
a0ed51b3 LW |
117 | return d; |
118 | } | |
119 | if (uv < 0x200000) { | |
eb160463 GS |
120 | *d++ = (U8)(( uv >> 18) | 0xf0); |
121 | *d++ = (U8)(((uv >> 12) & 0x3f) | 0x80); | |
122 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); | |
123 | *d++ = (U8)(( uv & 0x3f) | 0x80); | |
a0ed51b3 LW |
124 | return d; |
125 | } | |
126 | if (uv < 0x4000000) { | |
eb160463 GS |
127 | *d++ = (U8)(( uv >> 24) | 0xf8); |
128 | *d++ = (U8)(((uv >> 18) & 0x3f) | 0x80); | |
129 | *d++ = (U8)(((uv >> 12) & 0x3f) | 0x80); | |
130 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); | |
131 | *d++ = (U8)(( uv & 0x3f) | 0x80); | |
a0ed51b3 LW |
132 | return d; |
133 | } | |
134 | if (uv < 0x80000000) { | |
eb160463 GS |
135 | *d++ = (U8)(( uv >> 30) | 0xfc); |
136 | *d++ = (U8)(((uv >> 24) & 0x3f) | 0x80); | |
137 | *d++ = (U8)(((uv >> 18) & 0x3f) | 0x80); | |
138 | *d++ = (U8)(((uv >> 12) & 0x3f) | 0x80); | |
139 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); | |
140 | *d++ = (U8)(( uv & 0x3f) | 0x80); | |
a0ed51b3 LW |
141 | return d; |
142 | } | |
6b8eaf93 | 143 | #ifdef HAS_QUAD |
d7578b48 | 144 | if (uv < UTF8_QUAD_MAX) |
a0ed51b3 LW |
145 | #endif |
146 | { | |
eb160463 GS |
147 | *d++ = 0xfe; /* Can't match U+FEFF! */ |
148 | *d++ = (U8)(((uv >> 30) & 0x3f) | 0x80); | |
149 | *d++ = (U8)(((uv >> 24) & 0x3f) | 0x80); | |
150 | *d++ = (U8)(((uv >> 18) & 0x3f) | 0x80); | |
151 | *d++ = (U8)(((uv >> 12) & 0x3f) | 0x80); | |
152 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); | |
153 | *d++ = (U8)(( uv & 0x3f) | 0x80); | |
a0ed51b3 LW |
154 | return d; |
155 | } | |
6b8eaf93 | 156 | #ifdef HAS_QUAD |
a0ed51b3 | 157 | { |
eb160463 GS |
158 | *d++ = 0xff; /* Can't match U+FFFE! */ |
159 | *d++ = 0x80; /* 6 Reserved bits */ | |
160 | *d++ = (U8)(((uv >> 60) & 0x0f) | 0x80); /* 2 Reserved bits */ | |
161 | *d++ = (U8)(((uv >> 54) & 0x3f) | 0x80); | |
162 | *d++ = (U8)(((uv >> 48) & 0x3f) | 0x80); | |
163 | *d++ = (U8)(((uv >> 42) & 0x3f) | 0x80); | |
164 | *d++ = (U8)(((uv >> 36) & 0x3f) | 0x80); | |
165 | *d++ = (U8)(((uv >> 30) & 0x3f) | 0x80); | |
166 | *d++ = (U8)(((uv >> 24) & 0x3f) | 0x80); | |
167 | *d++ = (U8)(((uv >> 18) & 0x3f) | 0x80); | |
168 | *d++ = (U8)(((uv >> 12) & 0x3f) | 0x80); | |
169 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); | |
170 | *d++ = (U8)(( uv & 0x3f) | 0x80); | |
a0ed51b3 LW |
171 | return d; |
172 | } | |
173 | #endif | |
1d72bdf6 | 174 | #endif /* Loop style */ |
a0ed51b3 | 175 | } |
9041c2e3 | 176 | |
9041c2e3 | 177 | /* |
eebe1485 | 178 | |
5da9da9e | 179 | Tests if some arbitrary number of bytes begins in a valid UTF-8 |
82686b01 JH |
180 | character. Note that an INVARIANT (i.e. ASCII) character is a valid |
181 | UTF-8 character. The actual number of bytes in the UTF-8 character | |
182 | will be returned if it is valid, otherwise 0. | |
9041c2e3 | 183 | |
d7a71dc3 NC |
184 | This is the "slow" version as opposed to the "fast" version which is |
185 | the "unrolled" IS_UTF8_CHAR(). E.g. for t/uni/class.t the speed | |
186 | difference is a factor of 2 to 3. For lengths (UTF8SKIP(s)) of four | |
187 | or less you should use the IS_UTF8_CHAR(), for lengths of five or more | |
188 | you should use the _slow(). In practice this means that the _slow() | |
189 | will be used very rarely, since the maximum Unicode code point (as of | |
190 | Unicode 4.1) is U+10FFFF, which encodes in UTF-8 to four bytes. Only | |
191 | the "Perl extended UTF-8" (the infamous 'v-strings') will encode into | |
192 | five bytes or more. | |
193 | ||
82686b01 | 194 | =cut */ |
767c9e37 | 195 | STATIC STRLEN |
5900599a | 196 | S_is_utf8_char_slow(const U8 *s, const STRLEN len) |
386d01d6 GS |
197 | { |
198 | U8 u = *s; | |
d7a71dc3 | 199 | STRLEN slen; |
067a85ef | 200 | UV uv, ouv; |
386d01d6 | 201 | |
1d72bdf6 | 202 | if (UTF8_IS_INVARIANT(u)) |
386d01d6 GS |
203 | return 1; |
204 | ||
60006e79 | 205 | if (!UTF8_IS_START(u)) |
386d01d6 GS |
206 | return 0; |
207 | ||
60006e79 | 208 | if (len < 2 || !UTF8_IS_CONTINUATION(s[1])) |
067a85ef A |
209 | return 0; |
210 | ||
386d01d6 GS |
211 | slen = len - 1; |
212 | s++; | |
48ea04fa TS |
213 | #ifdef EBCDIC |
214 | u = NATIVE_TO_UTF(u); | |
215 | #endif | |
6eb6869e | 216 | u &= UTF_START_MASK(len); |
1d72bdf6 | 217 | uv = u; |
067a85ef | 218 | ouv = uv; |
386d01d6 | 219 | while (slen--) { |
60006e79 | 220 | if (!UTF8_IS_CONTINUATION(*s)) |
386d01d6 | 221 | return 0; |
8850bf83 | 222 | uv = UTF8_ACCUMULATE(uv, *s); |
209a9bc1 | 223 | if (uv < ouv) |
067a85ef A |
224 | return 0; |
225 | ouv = uv; | |
386d01d6 GS |
226 | s++; |
227 | } | |
067a85ef | 228 | |
eb160463 | 229 | if ((STRLEN)UNISKIP(uv) < len) |
067a85ef A |
230 | return 0; |
231 | ||
386d01d6 GS |
232 | return len; |
233 | } | |
234 | ||
6662521e | 235 | /* |
d7a71dc3 NC |
236 | =for apidoc A|STRLEN|is_utf8_char|U8 *s |
237 | ||
238 | Tests if some arbitrary number of bytes begins in a valid UTF-8 | |
239 | character. Note that an INVARIANT (i.e. ASCII) character is a valid | |
240 | UTF-8 character. The actual number of bytes in the UTF-8 character | |
241 | will be returned if it is valid, otherwise 0. | |
242 | ||
243 | =cut */ | |
244 | STRLEN | |
245 | Perl_is_utf8_char(pTHX_ U8 *s) | |
246 | { | |
d015a557 | 247 | const STRLEN len = UTF8SKIP(s); |
1e7ed80e | 248 | PERL_UNUSED_CONTEXT; |
d7a71dc3 NC |
249 | #ifdef IS_UTF8_CHAR |
250 | if (IS_UTF8_CHAR_FAST(len)) | |
251 | return IS_UTF8_CHAR(s, len) ? len : 0; | |
252 | #endif /* #ifdef IS_UTF8_CHAR */ | |
253 | return is_utf8_char_slow(s, len); | |
254 | } | |
255 | ||
256 | /* | |
eebe1485 | 257 | =for apidoc A|bool|is_utf8_string|U8 *s|STRLEN len |
6662521e | 258 | |
5835a535 | 259 | Returns true if first C<len> bytes of the given string form a valid |
cd458e05 JH |
260 | UTF-8 string, false otherwise. Note that 'a valid UTF-8 string' does |
261 | not mean 'a string that contains code points above 0x7F encoded in UTF-8' | |
262 | because a valid ASCII string is a valid UTF-8 string. | |
6662521e | 263 | |
d7a71dc3 NC |
264 | See also is_utf8_string_loclen() and is_utf8_string_loc(). |
265 | ||
6662521e GS |
266 | =cut |
267 | */ | |
268 | ||
8e84507e | 269 | bool |
6662521e GS |
270 | Perl_is_utf8_string(pTHX_ U8 *s, STRLEN len) |
271 | { | |
8e7b0921 | 272 | const U8* const send = s + (len ? len : strlen((const char *)s)); |
1f49be52 | 273 | const U8* x = s; |
067a85ef | 274 | |
1e7ed80e | 275 | PERL_UNUSED_CONTEXT; |
1aa99e6b | 276 | |
6662521e | 277 | while (x < send) { |
8c18bf38 | 278 | STRLEN c; |
1acdb0da JH |
279 | /* Inline the easy bits of is_utf8_char() here for speed... */ |
280 | if (UTF8_IS_INVARIANT(*x)) | |
281 | c = 1; | |
282 | else if (!UTF8_IS_START(*x)) | |
d7a71dc3 | 283 | goto out; |
1acdb0da JH |
284 | else { |
285 | /* ... and call is_utf8_char() only if really needed. */ | |
d7a71dc3 NC |
286 | #ifdef IS_UTF8_CHAR |
287 | c = UTF8SKIP(x); | |
288 | if (IS_UTF8_CHAR_FAST(c)) { | |
289 | if (!IS_UTF8_CHAR(x, c)) | |
161d0ac1 NC |
290 | c = 0; |
291 | } | |
292 | else | |
293 | c = is_utf8_char_slow(x, c); | |
d7a71dc3 NC |
294 | #else |
295 | c = is_utf8_char(x); | |
296 | #endif /* #ifdef IS_UTF8_CHAR */ | |
1acdb0da | 297 | if (!c) |
d7a71dc3 | 298 | goto out; |
1acdb0da | 299 | } |
6662521e | 300 | x += c; |
6662521e | 301 | } |
d7a71dc3 NC |
302 | |
303 | out: | |
60006e79 JH |
304 | if (x != send) |
305 | return FALSE; | |
067a85ef A |
306 | |
307 | return TRUE; | |
6662521e GS |
308 | } |
309 | ||
67e989fb | 310 | /* |
5082993f NC |
311 | Implemented as a macro in utf8.h |
312 | ||
313 | =for apidoc A|bool|is_utf8_string_loc|const U8 *s|STRLEN len|const U8 **ep | |
314 | ||
315 | Like is_utf8_string() but stores the location of the failure (in the | |
316 | case of "utf8ness failure") or the location s+len (in the case of | |
317 | "utf8ness success") in the C<ep>. | |
318 | ||
319 | See also is_utf8_string_loclen() and is_utf8_string(). | |
320 | ||
d7a71dc3 | 321 | =for apidoc A|bool|is_utf8_string_loclen|const U8 *s|STRLEN len|const U8 **ep|const STRLEN *el |
9c20fa4a | 322 | |
8f53e8d5 | 323 | Like is_utf8_string() but stores the location of the failure (in the |
d7a71dc3 NC |
324 | case of "utf8ness failure") or the location s+len (in the case of |
325 | "utf8ness success") in the C<ep>, and the number of UTF-8 | |
326 | encoded characters in the C<el>. | |
327 | ||
328 | See also is_utf8_string_loc() and is_utf8_string(). | |
9c20fa4a JH |
329 | |
330 | =cut | |
331 | */ | |
332 | ||
333 | bool | |
d7a71dc3 | 334 | Perl_is_utf8_string_loclen(pTHX_ const U8 *s, STRLEN len, const U8 **ep, STRLEN *el) |
9c20fa4a | 335 | { |
8e7b0921 | 336 | const U8* const send = s + (len ? len : strlen((const char *)s)); |
1f49be52 | 337 | const U8* x = s; |
9c20fa4a | 338 | STRLEN c; |
86d06bda | 339 | STRLEN outlen = 0; |
1e7ed80e | 340 | PERL_UNUSED_CONTEXT; |
9c20fa4a | 341 | |
9c20fa4a JH |
342 | while (x < send) { |
343 | /* Inline the easy bits of is_utf8_char() here for speed... */ | |
344 | if (UTF8_IS_INVARIANT(*x)) | |
d7a71dc3 NC |
345 | c = 1; |
346 | else if (!UTF8_IS_START(*x)) | |
347 | goto out; | |
9c20fa4a | 348 | else { |
d7a71dc3 NC |
349 | /* ... and call is_utf8_char() only if really needed. */ |
350 | #ifdef IS_UTF8_CHAR | |
351 | c = UTF8SKIP(x); | |
352 | if (IS_UTF8_CHAR_FAST(c)) { | |
353 | if (!IS_UTF8_CHAR(x, c)) | |
354 | c = 0; | |
355 | } else | |
356 | c = is_utf8_char_slow(x, c); | |
357 | #else | |
358 | c = is_utf8_char(x); | |
359 | #endif /* #ifdef IS_UTF8_CHAR */ | |
360 | if (!c) | |
361 | goto out; | |
9c20fa4a | 362 | } |
d7a71dc3 | 363 | x += c; |
86d06bda | 364 | outlen++; |
9c20fa4a | 365 | } |
d7a71dc3 NC |
366 | |
367 | out: | |
86d06bda AL |
368 | if (el) |
369 | *el = outlen; | |
370 | ||
d7a71dc3 NC |
371 | if (ep) |
372 | *ep = x; | |
86d06bda | 373 | return (x == send); |
9c20fa4a JH |
374 | } |
375 | ||
376 | /* | |
d7a71dc3 | 377 | |
9041c2e3 | 378 | =for apidoc A|UV|utf8n_to_uvuni|U8 *s|STRLEN curlen|STRLEN *retlen|U32 flags |
67e989fb | 379 | |
9041c2e3 NIS |
380 | Bottom level UTF-8 decode routine. |
381 | Returns the unicode code point value of the first character in the string C<s> | |
cd458e05 | 382 | which is assumed to be in UTF-8 encoding and no longer than C<curlen>; |
7df053ec | 383 | C<retlen> will be set to the length, in bytes, of that character. |
67e989fb | 384 | |
cd458e05 | 385 | If C<s> does not point to a well-formed UTF-8 character, the behaviour |
dcad2880 JH |
386 | is dependent on the value of C<flags>: if it contains UTF8_CHECK_ONLY, |
387 | it is assumed that the caller will raise a warning, and this function | |
28d3d195 JH |
388 | will silently just set C<retlen> to C<-1> and return zero. If the |
389 | C<flags> does not contain UTF8_CHECK_ONLY, warnings about | |
390 | malformations will be given, C<retlen> will be set to the expected | |
391 | length of the UTF-8 character in bytes, and zero will be returned. | |
392 | ||
393 | The C<flags> can also contain various flags to allow deviations from | |
394 | the strict UTF-8 encoding (see F<utf8.h>). | |
67e989fb | 395 | |
9041c2e3 NIS |
396 | Most code should use utf8_to_uvchr() rather than call this directly. |
397 | ||
37607a96 PK |
398 | =cut |
399 | */ | |
67e989fb | 400 | |
a0ed51b3 | 401 | UV |
37607a96 | 402 | Perl_utf8n_to_uvuni(pTHX_ U8 *s, STRLEN curlen, STRLEN *retlen, U32 flags) |
a0ed51b3 | 403 | { |
43b2f713 | 404 | const U8 * const s0 = s; |
9c5ffd7c | 405 | UV uv = *s, ouv = 0; |
ba210ebe | 406 | STRLEN len = 1; |
1f49be52 AL |
407 | const bool dowarn = ckWARN_d(WARN_UTF8); |
408 | const UV startbyte = *s; | |
ba210ebe | 409 | STRLEN expectlen = 0; |
a0dbb045 JH |
410 | U32 warning = 0; |
411 | ||
412 | /* This list is a superset of the UTF8_ALLOW_XXX. */ | |
413 | ||
414 | #define UTF8_WARN_EMPTY 1 | |
415 | #define UTF8_WARN_CONTINUATION 2 | |
416 | #define UTF8_WARN_NON_CONTINUATION 3 | |
417 | #define UTF8_WARN_FE_FF 4 | |
418 | #define UTF8_WARN_SHORT 5 | |
419 | #define UTF8_WARN_OVERFLOW 6 | |
420 | #define UTF8_WARN_SURROGATE 7 | |
c867b360 JH |
421 | #define UTF8_WARN_LONG 8 |
422 | #define UTF8_WARN_FFFF 9 /* Also FFFE. */ | |
a0dbb045 JH |
423 | |
424 | if (curlen == 0 && | |
425 | !(flags & UTF8_ALLOW_EMPTY)) { | |
426 | warning = UTF8_WARN_EMPTY; | |
0c443dc2 JH |
427 | goto malformed; |
428 | } | |
429 | ||
1d72bdf6 | 430 | if (UTF8_IS_INVARIANT(uv)) { |
a0ed51b3 LW |
431 | if (retlen) |
432 | *retlen = 1; | |
c4d5f83a | 433 | return (UV) (NATIVE_TO_UTF(*s)); |
a0ed51b3 | 434 | } |
67e989fb | 435 | |
421a8bf2 | 436 | if (UTF8_IS_CONTINUATION(uv) && |
fcc8fcf6 | 437 | !(flags & UTF8_ALLOW_CONTINUATION)) { |
a0dbb045 | 438 | warning = UTF8_WARN_CONTINUATION; |
ba210ebe JH |
439 | goto malformed; |
440 | } | |
441 | ||
421a8bf2 | 442 | if (UTF8_IS_START(uv) && curlen > 1 && !UTF8_IS_CONTINUATION(s[1]) && |
fcc8fcf6 | 443 | !(flags & UTF8_ALLOW_NON_CONTINUATION)) { |
a0dbb045 | 444 | warning = UTF8_WARN_NON_CONTINUATION; |
ba210ebe JH |
445 | goto malformed; |
446 | } | |
9041c2e3 | 447 | |
1d72bdf6 | 448 | #ifdef EBCDIC |
75383841 | 449 | uv = NATIVE_TO_UTF(uv); |
1d72bdf6 | 450 | #else |
fcc8fcf6 JH |
451 | if ((uv == 0xfe || uv == 0xff) && |
452 | !(flags & UTF8_ALLOW_FE_FF)) { | |
a0dbb045 | 453 | warning = UTF8_WARN_FE_FF; |
ba210ebe | 454 | goto malformed; |
a0ed51b3 | 455 | } |
1d72bdf6 NIS |
456 | #endif |
457 | ||
ba210ebe JH |
458 | if (!(uv & 0x20)) { len = 2; uv &= 0x1f; } |
459 | else if (!(uv & 0x10)) { len = 3; uv &= 0x0f; } | |
460 | else if (!(uv & 0x08)) { len = 4; uv &= 0x07; } | |
461 | else if (!(uv & 0x04)) { len = 5; uv &= 0x03; } | |
1d72bdf6 NIS |
462 | #ifdef EBCDIC |
463 | else if (!(uv & 0x02)) { len = 6; uv &= 0x01; } | |
464 | else { len = 7; uv &= 0x01; } | |
465 | #else | |
ba210ebe JH |
466 | else if (!(uv & 0x02)) { len = 6; uv &= 0x01; } |
467 | else if (!(uv & 0x01)) { len = 7; uv = 0; } | |
1d72bdf6 NIS |
468 | else { len = 13; uv = 0; } /* whoa! */ |
469 | #endif | |
470 | ||
a0ed51b3 LW |
471 | if (retlen) |
472 | *retlen = len; | |
9041c2e3 | 473 | |
ba210ebe JH |
474 | expectlen = len; |
475 | ||
fcc8fcf6 JH |
476 | if ((curlen < expectlen) && |
477 | !(flags & UTF8_ALLOW_SHORT)) { | |
a0dbb045 | 478 | warning = UTF8_WARN_SHORT; |
ba210ebe JH |
479 | goto malformed; |
480 | } | |
481 | ||
482 | len--; | |
a0ed51b3 | 483 | s++; |
ba210ebe JH |
484 | ouv = uv; |
485 | ||
a0ed51b3 | 486 | while (len--) { |
421a8bf2 JH |
487 | if (!UTF8_IS_CONTINUATION(*s) && |
488 | !(flags & UTF8_ALLOW_NON_CONTINUATION)) { | |
a0dbb045 JH |
489 | s--; |
490 | warning = UTF8_WARN_NON_CONTINUATION; | |
ba210ebe | 491 | goto malformed; |
a0ed51b3 LW |
492 | } |
493 | else | |
8850bf83 | 494 | uv = UTF8_ACCUMULATE(uv, *s); |
a0dbb045 JH |
495 | if (!(uv > ouv)) { |
496 | /* These cannot be allowed. */ | |
497 | if (uv == ouv) { | |
f66b99ab | 498 | if (expectlen != 13 && !(flags & UTF8_ALLOW_LONG)) { |
a0dbb045 JH |
499 | warning = UTF8_WARN_LONG; |
500 | goto malformed; | |
501 | } | |
502 | } | |
503 | else { /* uv < ouv */ | |
504 | /* This cannot be allowed. */ | |
505 | warning = UTF8_WARN_OVERFLOW; | |
506 | goto malformed; | |
507 | } | |
ba210ebe JH |
508 | } |
509 | s++; | |
510 | ouv = uv; | |
511 | } | |
512 | ||
421a8bf2 | 513 | if (UNICODE_IS_SURROGATE(uv) && |
fcc8fcf6 | 514 | !(flags & UTF8_ALLOW_SURROGATE)) { |
a0dbb045 | 515 | warning = UTF8_WARN_SURROGATE; |
ba210ebe | 516 | goto malformed; |
eb160463 | 517 | } else if ((expectlen > (STRLEN)UNISKIP(uv)) && |
fcc8fcf6 | 518 | !(flags & UTF8_ALLOW_LONG)) { |
a0dbb045 | 519 | warning = UTF8_WARN_LONG; |
ba210ebe | 520 | goto malformed; |
421a8bf2 | 521 | } else if (UNICODE_IS_ILLEGAL(uv) && |
a9917092 | 522 | !(flags & UTF8_ALLOW_FFFF)) { |
a0dbb045 | 523 | warning = UTF8_WARN_FFFF; |
a9917092 | 524 | goto malformed; |
a0ed51b3 | 525 | } |
ba210ebe | 526 | |
a0ed51b3 | 527 | return uv; |
ba210ebe JH |
528 | |
529 | malformed: | |
530 | ||
fcc8fcf6 | 531 | if (flags & UTF8_CHECK_ONLY) { |
ba210ebe | 532 | if (retlen) |
d2ae4405 | 533 | *retlen = ((STRLEN) -1); |
ba210ebe JH |
534 | return 0; |
535 | } | |
536 | ||
a0dbb045 | 537 | if (dowarn) { |
d7559646 | 538 | SV* const sv = sv_2mortal(newSVpvs("Malformed UTF-8 character ")); |
a0dbb045 JH |
539 | |
540 | switch (warning) { | |
541 | case 0: /* Intentionally empty. */ break; | |
542 | case UTF8_WARN_EMPTY: | |
d7559646 | 543 | sv_catpvs(sv, "(empty string)"); |
a0dbb045 JH |
544 | break; |
545 | case UTF8_WARN_CONTINUATION: | |
097fb8e2 | 546 | Perl_sv_catpvf(aTHX_ sv, "(unexpected continuation byte 0x%02"UVxf", with no preceding start byte)", uv); |
a0dbb045 JH |
547 | break; |
548 | case UTF8_WARN_NON_CONTINUATION: | |
097fb8e2 JH |
549 | if (s == s0) |
550 | Perl_sv_catpvf(aTHX_ sv, "(unexpected non-continuation byte 0x%02"UVxf", immediately after start byte 0x%02"UVxf")", | |
551 | (UV)s[1], startbyte); | |
78fd745e AL |
552 | else { |
553 | const int len = (int)(s-s0); | |
097fb8e2 | 554 | Perl_sv_catpvf(aTHX_ sv, "(unexpected non-continuation byte 0x%02"UVxf", %d byte%s after start byte 0x%02"UVxf", expected %d bytes)", |
78fd745e AL |
555 | (UV)s[1], len, len > 1 ? "s" : "", startbyte, (int)expectlen); |
556 | } | |
557 | ||
a0dbb045 JH |
558 | break; |
559 | case UTF8_WARN_FE_FF: | |
560 | Perl_sv_catpvf(aTHX_ sv, "(byte 0x%02"UVxf")", uv); | |
561 | break; | |
562 | case UTF8_WARN_SHORT: | |
097fb8e2 | 563 | Perl_sv_catpvf(aTHX_ sv, "(%d byte%s, need %d, after start byte 0x%02"UVxf")", |
228fe6e6 | 564 | (int)curlen, curlen == 1 ? "" : "s", (int)expectlen, startbyte); |
b31f83c2 | 565 | expectlen = curlen; /* distance for caller to skip */ |
a0dbb045 JH |
566 | break; |
567 | case UTF8_WARN_OVERFLOW: | |
097fb8e2 JH |
568 | Perl_sv_catpvf(aTHX_ sv, "(overflow at 0x%"UVxf", byte 0x%02x, after start byte 0x%02"UVxf")", |
569 | ouv, *s, startbyte); | |
a0dbb045 JH |
570 | break; |
571 | case UTF8_WARN_SURROGATE: | |
572 | Perl_sv_catpvf(aTHX_ sv, "(UTF-16 surrogate 0x%04"UVxf")", uv); | |
573 | break; | |
a0dbb045 | 574 | case UTF8_WARN_LONG: |
097fb8e2 | 575 | Perl_sv_catpvf(aTHX_ sv, "(%d byte%s, need %d, after start byte 0x%02"UVxf")", |
228fe6e6 | 576 | (int)expectlen, expectlen == 1 ? "": "s", UNISKIP(uv), startbyte); |
a0dbb045 JH |
577 | break; |
578 | case UTF8_WARN_FFFF: | |
579 | Perl_sv_catpvf(aTHX_ sv, "(character 0x%04"UVxf")", uv); | |
580 | break; | |
581 | default: | |
d7559646 | 582 | sv_catpvs(sv, "(unknown reason)"); |
a0dbb045 JH |
583 | break; |
584 | } | |
585 | ||
586 | if (warning) { | |
d015a557 | 587 | const char * const s = SvPVX_const(sv); |
a0dbb045 JH |
588 | |
589 | if (PL_op) | |
9014280d | 590 | Perl_warner(aTHX_ packWARN(WARN_UTF8), |
53e06cf0 | 591 | "%s in %s", s, OP_DESC(PL_op)); |
a0dbb045 | 592 | else |
9014280d | 593 | Perl_warner(aTHX_ packWARN(WARN_UTF8), "%s", s); |
a0dbb045 JH |
594 | } |
595 | } | |
596 | ||
ba210ebe | 597 | if (retlen) |
28d3d195 | 598 | *retlen = expectlen ? expectlen : len; |
ba210ebe | 599 | |
28d3d195 | 600 | return 0; |
a0ed51b3 LW |
601 | } |
602 | ||
8e84507e | 603 | /* |
37607a96 | 604 | =for apidoc A|UV|utf8_to_uvchr|U8 *s|STRLEN *retlen |
9041c2e3 NIS |
605 | |
606 | Returns the native character value of the first character in the string C<s> | |
cd458e05 | 607 | which is assumed to be in UTF-8 encoding; C<retlen> will be set to the |
9041c2e3 NIS |
608 | length, in bytes, of that character. |
609 | ||
cd458e05 | 610 | If C<s> does not point to a well-formed UTF-8 character, zero is |
9041c2e3 NIS |
611 | returned and retlen is set, if possible, to -1. |
612 | ||
613 | =cut | |
614 | */ | |
615 | ||
616 | UV | |
37607a96 | 617 | Perl_utf8_to_uvchr(pTHX_ U8 *s, STRLEN *retlen) |
9041c2e3 | 618 | { |
5082993f NC |
619 | return utf8n_to_uvchr(s, UTF8_MAXBYTES, retlen, |
620 | ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY); | |
9041c2e3 NIS |
621 | } |
622 | ||
623 | /* | |
37607a96 | 624 | =for apidoc A|UV|utf8_to_uvuni|U8 *s|STRLEN *retlen |
9041c2e3 NIS |
625 | |
626 | Returns the Unicode code point of the first character in the string C<s> | |
cd458e05 | 627 | which is assumed to be in UTF-8 encoding; C<retlen> will be set to the |
9041c2e3 NIS |
628 | length, in bytes, of that character. |
629 | ||
630 | This function should only be used when returned UV is considered | |
631 | an index into the Unicode semantic tables (e.g. swashes). | |
632 | ||
cd458e05 | 633 | If C<s> does not point to a well-formed UTF-8 character, zero is |
ba210ebe | 634 | returned and retlen is set, if possible, to -1. |
8e84507e NIS |
635 | |
636 | =cut | |
637 | */ | |
638 | ||
639 | UV | |
37607a96 | 640 | Perl_utf8_to_uvuni(pTHX_ U8 *s, STRLEN *retlen) |
8e84507e | 641 | { |
9041c2e3 | 642 | /* Call the low level routine asking for checks */ |
a2a469f9 | 643 | return Perl_utf8n_to_uvuni(aTHX_ s, UTF8_MAXBYTES, retlen, |
872c91ae | 644 | ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY); |
8e84507e NIS |
645 | } |
646 | ||
b76347f2 | 647 | /* |
37607a96 | 648 | =for apidoc A|STRLEN|utf8_length|U8 *s|U8 *e |
b76347f2 JH |
649 | |
650 | Return the length of the UTF-8 char encoded string C<s> in characters. | |
02eb7b47 JH |
651 | Stops at C<e> (inclusive). If C<e E<lt> s> or if the scan would end |
652 | up past C<e>, croaks. | |
b76347f2 JH |
653 | |
654 | =cut | |
655 | */ | |
656 | ||
657 | STRLEN | |
37607a96 | 658 | Perl_utf8_length(pTHX_ U8 *s, U8 *e) |
b76347f2 JH |
659 | { |
660 | STRLEN len = 0; | |
d2ae4405 | 661 | U8 t = 0; |
b76347f2 | 662 | |
8850bf83 JH |
663 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g. |
664 | * the bitops (especially ~) can create illegal UTF-8. | |
665 | * In other words: in Perl UTF-8 is not just for Unicode. */ | |
666 | ||
8c18bf38 AL |
667 | if (e < s) |
668 | goto warn_and_return; | |
b76347f2 | 669 | while (s < e) { |
d2ae4405 | 670 | t = UTF8SKIP(s); |
901b21bf | 671 | if (e - s < t) { |
8c18bf38 | 672 | warn_and_return: |
901b21bf JH |
673 | if (ckWARN_d(WARN_UTF8)) { |
674 | if (PL_op) | |
675 | Perl_warner(aTHX_ packWARN(WARN_UTF8), | |
8c18bf38 | 676 | "%s in %s", unees, OP_DESC(PL_op)); |
901b21bf JH |
677 | else |
678 | Perl_warner(aTHX_ packWARN(WARN_UTF8), unees); | |
679 | } | |
680 | return len; | |
681 | } | |
b76347f2 JH |
682 | s += t; |
683 | len++; | |
684 | } | |
685 | ||
686 | return len; | |
687 | } | |
688 | ||
b06226ff | 689 | /* |
eebe1485 | 690 | =for apidoc A|IV|utf8_distance|U8 *a|U8 *b |
b06226ff | 691 | |
cd458e05 | 692 | Returns the number of UTF-8 characters between the UTF-8 pointers C<a> |
b06226ff JH |
693 | and C<b>. |
694 | ||
695 | WARNING: use only if you *know* that the pointers point inside the | |
696 | same UTF-8 buffer. | |
697 | ||
37607a96 PK |
698 | =cut |
699 | */ | |
a0ed51b3 | 700 | |
02eb7b47 | 701 | IV |
864dbfa3 | 702 | Perl_utf8_distance(pTHX_ U8 *a, U8 *b) |
a0ed51b3 | 703 | { |
2f583b3c | 704 | return (a < b) ? -1 * (IV) utf8_length(a, b) : (IV) utf8_length(b, a); |
a0ed51b3 LW |
705 | } |
706 | ||
b06226ff | 707 | /* |
37607a96 | 708 | =for apidoc A|U8 *|utf8_hop|U8 *s|I32 off |
b06226ff | 709 | |
8850bf83 JH |
710 | Return the UTF-8 pointer C<s> displaced by C<off> characters, either |
711 | forward or backward. | |
b06226ff JH |
712 | |
713 | WARNING: do not use the following unless you *know* C<off> is within | |
8850bf83 JH |
714 | the UTF-8 data pointed to by C<s> *and* that on entry C<s> is aligned |
715 | on the first byte of character or just after the last byte of a character. | |
b06226ff | 716 | |
37607a96 PK |
717 | =cut |
718 | */ | |
a0ed51b3 LW |
719 | |
720 | U8 * | |
864dbfa3 | 721 | Perl_utf8_hop(pTHX_ U8 *s, I32 off) |
a0ed51b3 | 722 | { |
1e7ed80e | 723 | PERL_UNUSED_CONTEXT; |
8850bf83 JH |
724 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g |
725 | * the bitops (especially ~) can create illegal UTF-8. | |
726 | * In other words: in Perl UTF-8 is not just for Unicode. */ | |
727 | ||
a0ed51b3 LW |
728 | if (off >= 0) { |
729 | while (off--) | |
730 | s += UTF8SKIP(s); | |
731 | } | |
732 | else { | |
733 | while (off++) { | |
734 | s--; | |
8850bf83 JH |
735 | while (UTF8_IS_CONTINUATION(*s)) |
736 | s--; | |
a0ed51b3 LW |
737 | } |
738 | } | |
065cbbe5 | 739 | return (U8 *)s; |
a0ed51b3 LW |
740 | } |
741 | ||
6940069f | 742 | /* |
eebe1485 | 743 | =for apidoc A|U8 *|utf8_to_bytes|U8 *s|STRLEN *len |
6940069f | 744 | |
cd458e05 | 745 | Converts a string C<s> of length C<len> from UTF-8 into byte encoding. |
246fae53 MG |
746 | Unlike C<bytes_to_utf8>, this over-writes the original string, and |
747 | updates len to contain the new length. | |
67e989fb | 748 | Returns zero on failure, setting C<len> to -1. |
6940069f GS |
749 | |
750 | =cut | |
751 | */ | |
752 | ||
753 | U8 * | |
37607a96 | 754 | Perl_utf8_to_bytes(pTHX_ U8 *s, STRLEN *len) |
6940069f | 755 | { |
43b2f713 AL |
756 | U8 * const save = s; |
757 | U8 * const send = s + *len; | |
6940069f | 758 | U8 *d; |
246fae53 | 759 | |
cd458e05 | 760 | /* ensure valid UTF-8 and chars < 256 before updating string */ |
43b2f713 | 761 | while (s < send) { |
dcad2880 JH |
762 | U8 c = *s++; |
763 | ||
1d72bdf6 NIS |
764 | if (!UTF8_IS_INVARIANT(c) && |
765 | (!UTF8_IS_DOWNGRADEABLE_START(c) || (s >= send) | |
766 | || !(c = *s++) || !UTF8_IS_CONTINUATION(c))) { | |
d2ae4405 | 767 | *len = ((STRLEN) -1); |
dcad2880 JH |
768 | return 0; |
769 | } | |
246fae53 | 770 | } |
dcad2880 JH |
771 | |
772 | d = s = save; | |
6940069f | 773 | while (s < send) { |
ed646e6e | 774 | STRLEN ulen; |
9041c2e3 | 775 | *d++ = (U8)utf8_to_uvchr(s, &ulen); |
ed646e6e | 776 | s += ulen; |
6940069f GS |
777 | } |
778 | *d = '\0'; | |
246fae53 | 779 | *len = d - save; |
6940069f GS |
780 | return save; |
781 | } | |
782 | ||
783 | /* | |
c05e0e2f | 784 | =for apidoc A|U8 *|bytes_from_utf8|const U8 *s|STRLEN *len|bool *is_utf8 |
f9a63242 | 785 | |
cd458e05 | 786 | Converts a string C<s> of length C<len> from UTF-8 into byte encoding. |
7120cae1 | 787 | Unlike C<utf8_to_bytes> but like C<bytes_to_utf8>, returns a pointer to |
ef9edfd0 JH |
788 | the newly-created string, and updates C<len> to contain the new |
789 | length. Returns the original string if no conversion occurs, C<len> | |
790 | is unchanged. Do nothing if C<is_utf8> points to 0. Sets C<is_utf8> to | |
791 | 0 if C<s> is converted or contains all 7bit characters. | |
f9a63242 | 792 | |
37607a96 PK |
793 | =cut |
794 | */ | |
f9a63242 JH |
795 | |
796 | U8 * | |
37607a96 | 797 | Perl_bytes_from_utf8(pTHX_ U8 *s, STRLEN *len, bool *is_utf8) |
f9a63242 | 798 | { |
f9a63242 | 799 | U8 *d; |
c05e0e2f AL |
800 | const U8 *start = s; |
801 | const U8 *send; | |
f9a63242 | 802 | I32 count = 0; |
ed6a78eb | 803 | const U8 *s2; |
f9a63242 | 804 | |
1e7ed80e | 805 | PERL_UNUSED_CONTEXT; |
f9a63242 | 806 | if (!*is_utf8) |
e2b56717 | 807 | return (U8 *)start; |
f9a63242 | 808 | |
cd458e05 | 809 | /* ensure valid UTF-8 and chars < 256 before converting string */ |
f9a63242 | 810 | for (send = s + *len; s < send;) { |
c05e0e2f | 811 | U8 c = *s++; |
1d72bdf6 | 812 | if (!UTF8_IS_INVARIANT(c)) { |
db42d148 NIS |
813 | if (UTF8_IS_DOWNGRADEABLE_START(c) && s < send && |
814 | (c = *s++) && UTF8_IS_CONTINUATION(c)) | |
815 | count++; | |
816 | else | |
e2b56717 | 817 | return (U8 *)start; |
db42d148 | 818 | } |
f9a63242 JH |
819 | } |
820 | ||
8e7b0921 | 821 | *is_utf8 = FALSE; |
f9a63242 | 822 | |
e4720ea4 | 823 | Newx(d, (*len) - count + 1, U8); |
ed6a78eb NC |
824 | s2 = start; start = d; |
825 | while (s2 < send) { | |
826 | U8 c = *s2++; | |
c4d5f83a NIS |
827 | if (!UTF8_IS_INVARIANT(c)) { |
828 | /* Then it is two-byte encoded */ | |
ed6a78eb | 829 | c = UTF8_ACCUMULATE(NATIVE_TO_UTF(c), *s2++); |
c4d5f83a NIS |
830 | c = ASCII_TO_NATIVE(c); |
831 | } | |
832 | *d++ = c; | |
f9a63242 JH |
833 | } |
834 | *d = '\0'; | |
835 | *len = d - start; | |
e2b56717 | 836 | return (U8 *)start; |
f9a63242 JH |
837 | } |
838 | ||
839 | /* | |
eebe1485 | 840 | =for apidoc A|U8 *|bytes_to_utf8|U8 *s|STRLEN *len |
6940069f | 841 | |
cd458e05 | 842 | Converts a string C<s> of length C<len> from ASCII into UTF-8 encoding. |
6662521e GS |
843 | Returns a pointer to the newly-created string, and sets C<len> to |
844 | reflect the new length. | |
6940069f | 845 | |
cd458e05 | 846 | If you want to convert to UTF-8 from other encodings than ASCII, |
5835a535 JH |
847 | see sv_recode_to_utf8(). |
848 | ||
497711e7 | 849 | =cut |
6940069f GS |
850 | */ |
851 | ||
852 | U8* | |
37607a96 | 853 | Perl_bytes_to_utf8(pTHX_ U8 *s, STRLEN *len) |
6940069f | 854 | { |
7120cae1 | 855 | const U8 * const send = s + (*len); |
6940069f GS |
856 | U8 *d; |
857 | U8 *dst; | |
1e7ed80e | 858 | PERL_UNUSED_CONTEXT; |
6940069f | 859 | |
e4720ea4 | 860 | Newx(d, (*len) * 2 + 1, U8); |
6940069f GS |
861 | dst = d; |
862 | ||
863 | while (s < send) { | |
7120cae1 | 864 | const UV uv = NATIVE_TO_ASCII(*s++); |
c4d5f83a | 865 | if (UNI_IS_INVARIANT(uv)) |
eb160463 | 866 | *d++ = (U8)UTF_TO_NATIVE(uv); |
6940069f | 867 | else { |
eb160463 GS |
868 | *d++ = (U8)UTF8_EIGHT_BIT_HI(uv); |
869 | *d++ = (U8)UTF8_EIGHT_BIT_LO(uv); | |
6940069f GS |
870 | } |
871 | } | |
872 | *d = '\0'; | |
6662521e | 873 | *len = d-dst; |
6940069f GS |
874 | return dst; |
875 | } | |
876 | ||
a0ed51b3 | 877 | /* |
dea0fc0b | 878 | * Convert native (big-endian) or reversed (little-endian) UTF-16 to UTF-8. |
a0ed51b3 LW |
879 | * |
880 | * Destination must be pre-extended to 3/2 source. Do not use in-place. | |
881 | * We optimize for native, for obvious reasons. */ | |
882 | ||
883 | U8* | |
dea0fc0b | 884 | Perl_utf16_to_utf8(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 | 885 | { |
dea0fc0b JH |
886 | U8* pend; |
887 | U8* dstart = d; | |
888 | ||
6dc97886 NC |
889 | if (bytelen == 1 && p[0] == 0) { /* Be understanding. */ |
890 | d[0] = 0; | |
891 | *newlen = 1; | |
892 | return d; | |
893 | } | |
894 | ||
dea0fc0b | 895 | if (bytelen & 1) |
481ddcff | 896 | Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen %"UVuf, (UV)bytelen); |
dea0fc0b JH |
897 | |
898 | pend = p + bytelen; | |
899 | ||
a0ed51b3 | 900 | while (p < pend) { |
dea0fc0b JH |
901 | UV uv = (p[0] << 8) + p[1]; /* UTF-16BE */ |
902 | p += 2; | |
a0ed51b3 | 903 | if (uv < 0x80) { |
209f66d7 NC |
904 | #ifdef EBCDIC |
905 | *d++ = UNI_TO_NATIVE(uv); | |
906 | #else | |
eb160463 | 907 | *d++ = (U8)uv; |
209f66d7 | 908 | #endif |
a0ed51b3 LW |
909 | continue; |
910 | } | |
911 | if (uv < 0x800) { | |
eb160463 GS |
912 | *d++ = (U8)(( uv >> 6) | 0xc0); |
913 | *d++ = (U8)(( uv & 0x3f) | 0x80); | |
a0ed51b3 LW |
914 | continue; |
915 | } | |
916 | if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */ | |
ac388100 JH |
917 | UV low = (p[0] << 8) + p[1]; |
918 | p += 2; | |
dea0fc0b JH |
919 | if (low < 0xdc00 || low >= 0xdfff) |
920 | Perl_croak(aTHX_ "Malformed UTF-16 surrogate"); | |
a0ed51b3 LW |
921 | uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000; |
922 | } | |
923 | if (uv < 0x10000) { | |
eb160463 GS |
924 | *d++ = (U8)(( uv >> 12) | 0xe0); |
925 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); | |
926 | *d++ = (U8)(( uv & 0x3f) | 0x80); | |
a0ed51b3 LW |
927 | continue; |
928 | } | |
929 | else { | |
eb160463 GS |
930 | *d++ = (U8)(( uv >> 18) | 0xf0); |
931 | *d++ = (U8)(((uv >> 12) & 0x3f) | 0x80); | |
932 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); | |
933 | *d++ = (U8)(( uv & 0x3f) | 0x80); | |
a0ed51b3 LW |
934 | continue; |
935 | } | |
936 | } | |
dea0fc0b | 937 | *newlen = d - dstart; |
a0ed51b3 LW |
938 | return d; |
939 | } | |
940 | ||
941 | /* Note: this one is slightly destructive of the source. */ | |
942 | ||
943 | U8* | |
dea0fc0b | 944 | Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 LW |
945 | { |
946 | U8* s = (U8*)p; | |
43b2f713 | 947 | U8* const send = s + bytelen; |
a0ed51b3 | 948 | while (s < send) { |
43b2f713 | 949 | const U8 tmp = s[0]; |
a0ed51b3 LW |
950 | s[0] = s[1]; |
951 | s[1] = tmp; | |
952 | s += 2; | |
953 | } | |
dea0fc0b | 954 | return utf16_to_utf8(p, d, bytelen, newlen); |
a0ed51b3 LW |
955 | } |
956 | ||
957 | /* for now these are all defined (inefficiently) in terms of the utf8 versions */ | |
958 | ||
959 | bool | |
84afefe6 | 960 | Perl_is_uni_alnum(pTHX_ UV c) |
a0ed51b3 | 961 | { |
a2a469f9 | 962 | U8 tmpbuf[UTF8_MAXBYTES+1]; |
230880c1 | 963 | uvchr_to_utf8(tmpbuf, c); |
a0ed51b3 LW |
964 | return is_utf8_alnum(tmpbuf); |
965 | } | |
966 | ||
967 | bool | |
84afefe6 | 968 | Perl_is_uni_alnumc(pTHX_ UV c) |
b8c5462f | 969 | { |
a2a469f9 | 970 | U8 tmpbuf[UTF8_MAXBYTES+1]; |
230880c1 | 971 | uvchr_to_utf8(tmpbuf, c); |
b8c5462f JH |
972 | return is_utf8_alnumc(tmpbuf); |
973 | } | |
974 | ||
975 | bool | |
84afefe6 | 976 | Perl_is_uni_idfirst(pTHX_ UV c) |
a0ed51b3 | 977 | { |
a2a469f9 | 978 | U8 tmpbuf[UTF8_MAXBYTES+1]; |
230880c1 | 979 | uvchr_to_utf8(tmpbuf, c); |
a0ed51b3 LW |
980 | return is_utf8_idfirst(tmpbuf); |
981 | } | |
982 | ||
983 | bool | |
84afefe6 | 984 | Perl_is_uni_alpha(pTHX_ UV c) |
a0ed51b3 | 985 | { |
a2a469f9 | 986 | U8 tmpbuf[UTF8_MAXBYTES+1]; |
230880c1 | 987 | uvchr_to_utf8(tmpbuf, c); |
a0ed51b3 LW |
988 | return is_utf8_alpha(tmpbuf); |
989 | } | |
990 | ||
991 | bool | |
84afefe6 | 992 | Perl_is_uni_ascii(pTHX_ UV c) |
4d61ec05 | 993 | { |
a2a469f9 | 994 | U8 tmpbuf[UTF8_MAXBYTES+1]; |
230880c1 | 995 | uvchr_to_utf8(tmpbuf, c); |
4d61ec05 GS |
996 | return is_utf8_ascii(tmpbuf); |
997 | } | |
998 | ||
999 | bool | |
84afefe6 | 1000 | Perl_is_uni_space(pTHX_ UV c) |
a0ed51b3 | 1001 | { |
a2a469f9 | 1002 | U8 tmpbuf[UTF8_MAXBYTES+1]; |
230880c1 | 1003 | uvchr_to_utf8(tmpbuf, c); |
a0ed51b3 LW |
1004 | return is_utf8_space(tmpbuf); |
1005 | } | |
1006 | ||
1007 | bool | |
84afefe6 | 1008 | Perl_is_uni_digit(pTHX_ UV c) |
a0ed51b3 | 1009 | { |
a2a469f9 | 1010 | U8 tmpbuf[UTF8_MAXBYTES+1]; |
230880c1 | 1011 | uvchr_to_utf8(tmpbuf, c); |
a0ed51b3 LW |
1012 | return is_utf8_digit(tmpbuf); |
1013 | } | |
1014 | ||
1015 | bool | |
84afefe6 | 1016 | Perl_is_uni_upper(pTHX_ UV c) |
a0ed51b3 | 1017 | { |
a2a469f9 | 1018 | U8 tmpbuf[UTF8_MAXBYTES+1]; |
230880c1 | 1019 | uvchr_to_utf8(tmpbuf, c); |
a0ed51b3 LW |
1020 | return is_utf8_upper(tmpbuf); |
1021 | } | |
1022 | ||
1023 | bool | |
84afefe6 | 1024 | Perl_is_uni_lower(pTHX_ UV c) |
a0ed51b3 | 1025 | { |
a2a469f9 | 1026 | U8 tmpbuf[UTF8_MAXBYTES+1]; |
230880c1 | 1027 | uvchr_to_utf8(tmpbuf, c); |
a0ed51b3 LW |
1028 | return is_utf8_lower(tmpbuf); |
1029 | } | |
1030 | ||
1031 | bool | |
84afefe6 | 1032 | Perl_is_uni_cntrl(pTHX_ UV c) |
b8c5462f | 1033 | { |
a2a469f9 | 1034 | U8 tmpbuf[UTF8_MAXBYTES+1]; |
230880c1 | 1035 | uvchr_to_utf8(tmpbuf, c); |
b8c5462f JH |
1036 | return is_utf8_cntrl(tmpbuf); |
1037 | } | |
1038 | ||
1039 | bool | |
84afefe6 | 1040 | Perl_is_uni_graph(pTHX_ UV c) |
b8c5462f | 1041 | { |
a2a469f9 | 1042 | U8 tmpbuf[UTF8_MAXBYTES+1]; |
230880c1 | 1043 | uvchr_to_utf8(tmpbuf, c); |
b8c5462f JH |
1044 | return is_utf8_graph(tmpbuf); |
1045 | } | |
1046 | ||
1047 | bool | |
84afefe6 | 1048 | Perl_is_uni_print(pTHX_ UV c) |
a0ed51b3 | 1049 | { |
a2a469f9 | 1050 | U8 tmpbuf[UTF8_MAXBYTES+1]; |
230880c1 | 1051 | uvchr_to_utf8(tmpbuf, c); |
a0ed51b3 LW |
1052 | return is_utf8_print(tmpbuf); |
1053 | } | |
1054 | ||
b8c5462f | 1055 | bool |
84afefe6 | 1056 | Perl_is_uni_punct(pTHX_ UV c) |
b8c5462f | 1057 | { |
a2a469f9 | 1058 | U8 tmpbuf[UTF8_MAXBYTES+1]; |
230880c1 | 1059 | uvchr_to_utf8(tmpbuf, c); |
b8c5462f JH |
1060 | return is_utf8_punct(tmpbuf); |
1061 | } | |
1062 | ||
4d61ec05 | 1063 | bool |
84afefe6 | 1064 | Perl_is_uni_xdigit(pTHX_ UV c) |
4d61ec05 | 1065 | { |
a2a469f9 | 1066 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1]; |
230880c1 | 1067 | uvchr_to_utf8(tmpbuf, c); |
4d61ec05 GS |
1068 | return is_utf8_xdigit(tmpbuf); |
1069 | } | |
1070 | ||
84afefe6 JH |
1071 | UV |
1072 | Perl_to_uni_upper(pTHX_ UV c, U8* p, STRLEN *lenp) | |
a0ed51b3 | 1073 | { |
0ebc6274 JH |
1074 | uvchr_to_utf8(p, c); |
1075 | return to_utf8_upper(p, p, lenp); | |
a0ed51b3 LW |
1076 | } |
1077 | ||
84afefe6 JH |
1078 | UV |
1079 | Perl_to_uni_title(pTHX_ UV c, U8* p, STRLEN *lenp) | |
a0ed51b3 | 1080 | { |
0ebc6274 JH |
1081 | uvchr_to_utf8(p, c); |
1082 | return to_utf8_title(p, p, lenp); | |
a0ed51b3 LW |
1083 | } |
1084 | ||
84afefe6 JH |
1085 | UV |
1086 | Perl_to_uni_lower(pTHX_ UV c, U8* p, STRLEN *lenp) | |
a0ed51b3 | 1087 | { |
0ebc6274 JH |
1088 | uvchr_to_utf8(p, c); |
1089 | return to_utf8_lower(p, p, lenp); | |
a0ed51b3 LW |
1090 | } |
1091 | ||
84afefe6 JH |
1092 | UV |
1093 | Perl_to_uni_fold(pTHX_ UV c, U8* p, STRLEN *lenp) | |
1094 | { | |
0ebc6274 JH |
1095 | uvchr_to_utf8(p, c); |
1096 | return to_utf8_fold(p, p, lenp); | |
84afefe6 JH |
1097 | } |
1098 | ||
a0ed51b3 LW |
1099 | /* for now these all assume no locale info available for Unicode > 255 */ |
1100 | ||
1101 | bool | |
84afefe6 | 1102 | Perl_is_uni_alnum_lc(pTHX_ UV c) |
a0ed51b3 LW |
1103 | { |
1104 | return is_uni_alnum(c); /* XXX no locale support yet */ | |
1105 | } | |
1106 | ||
1107 | bool | |
84afefe6 | 1108 | Perl_is_uni_alnumc_lc(pTHX_ UV c) |
b8c5462f JH |
1109 | { |
1110 | return is_uni_alnumc(c); /* XXX no locale support yet */ | |
1111 | } | |
1112 | ||
1113 | bool | |
84afefe6 | 1114 | Perl_is_uni_idfirst_lc(pTHX_ UV c) |
a0ed51b3 LW |
1115 | { |
1116 | return is_uni_idfirst(c); /* XXX no locale support yet */ | |
1117 | } | |
1118 | ||
1119 | bool | |
84afefe6 | 1120 | Perl_is_uni_alpha_lc(pTHX_ UV c) |
a0ed51b3 LW |
1121 | { |
1122 | return is_uni_alpha(c); /* XXX no locale support yet */ | |
1123 | } | |
1124 | ||
1125 | bool | |
84afefe6 | 1126 | Perl_is_uni_ascii_lc(pTHX_ UV c) |
4d61ec05 GS |
1127 | { |
1128 | return is_uni_ascii(c); /* XXX no locale support yet */ | |
1129 | } | |
1130 | ||
1131 | bool | |
84afefe6 | 1132 | Perl_is_uni_space_lc(pTHX_ UV c) |
a0ed51b3 LW |
1133 | { |
1134 | return is_uni_space(c); /* XXX no locale support yet */ | |
1135 | } | |
1136 | ||
1137 | bool | |
84afefe6 | 1138 | Perl_is_uni_digit_lc(pTHX_ UV c) |
a0ed51b3 LW |
1139 | { |
1140 | return is_uni_digit(c); /* XXX no locale support yet */ | |
1141 | } | |
1142 | ||
1143 | bool | |
84afefe6 | 1144 | Perl_is_uni_upper_lc(pTHX_ UV c) |
a0ed51b3 LW |
1145 | { |
1146 | return is_uni_upper(c); /* XXX no locale support yet */ | |
1147 | } | |
1148 | ||
1149 | bool | |
84afefe6 | 1150 | Perl_is_uni_lower_lc(pTHX_ UV c) |
a0ed51b3 LW |
1151 | { |
1152 | return is_uni_lower(c); /* XXX no locale support yet */ | |
1153 | } | |
1154 | ||
1155 | bool | |
84afefe6 | 1156 | Perl_is_uni_cntrl_lc(pTHX_ UV c) |
b8c5462f JH |
1157 | { |
1158 | return is_uni_cntrl(c); /* XXX no locale support yet */ | |
1159 | } | |
1160 | ||
1161 | bool | |
84afefe6 | 1162 | Perl_is_uni_graph_lc(pTHX_ UV c) |
b8c5462f JH |
1163 | { |
1164 | return is_uni_graph(c); /* XXX no locale support yet */ | |
1165 | } | |
1166 | ||
1167 | bool | |
84afefe6 | 1168 | Perl_is_uni_print_lc(pTHX_ UV c) |
a0ed51b3 LW |
1169 | { |
1170 | return is_uni_print(c); /* XXX no locale support yet */ | |
1171 | } | |
1172 | ||
b8c5462f | 1173 | bool |
84afefe6 | 1174 | Perl_is_uni_punct_lc(pTHX_ UV c) |
b8c5462f JH |
1175 | { |
1176 | return is_uni_punct(c); /* XXX no locale support yet */ | |
1177 | } | |
1178 | ||
4d61ec05 | 1179 | bool |
84afefe6 | 1180 | Perl_is_uni_xdigit_lc(pTHX_ UV c) |
4d61ec05 GS |
1181 | { |
1182 | return is_uni_xdigit(c); /* XXX no locale support yet */ | |
1183 | } | |
1184 | ||
b7ac61fa JH |
1185 | U32 |
1186 | Perl_to_uni_upper_lc(pTHX_ U32 c) | |
1187 | { | |
ee099d14 JH |
1188 | /* XXX returns only the first character -- do not use XXX */ |
1189 | /* XXX no locale support yet */ | |
1190 | STRLEN len; | |
a2a469f9 | 1191 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1]; |
ee099d14 | 1192 | return (U32)to_uni_upper(c, tmpbuf, &len); |
b7ac61fa JH |
1193 | } |
1194 | ||
1195 | U32 | |
1196 | Perl_to_uni_title_lc(pTHX_ U32 c) | |
1197 | { | |
ee099d14 JH |
1198 | /* XXX returns only the first character XXX -- do not use XXX */ |
1199 | /* XXX no locale support yet */ | |
1200 | STRLEN len; | |
a2a469f9 | 1201 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1]; |
ee099d14 | 1202 | return (U32)to_uni_title(c, tmpbuf, &len); |
b7ac61fa JH |
1203 | } |
1204 | ||
1205 | U32 | |
1206 | Perl_to_uni_lower_lc(pTHX_ U32 c) | |
1207 | { | |
ee099d14 JH |
1208 | /* XXX returns only the first character -- do not use XXX */ |
1209 | /* XXX no locale support yet */ | |
1210 | STRLEN len; | |
a2a469f9 | 1211 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1]; |
ee099d14 | 1212 | return (U32)to_uni_lower(c, tmpbuf, &len); |
b7ac61fa JH |
1213 | } |
1214 | ||
6d29369a | 1215 | static bool |
4127a31c RH |
1216 | S_is_utf8_common(pTHX_ const U8 *const p, SV **swash, |
1217 | const char *const swashname) | |
a0ed51b3 | 1218 | { |
4127a31c | 1219 | if (!is_utf8_char((U8 *)p)) |
386d01d6 | 1220 | return FALSE; |
5082993f | 1221 | if (!*swash) |
ef049b7c | 1222 | *swash = swash_init("utf8", (char *)swashname, &PL_sv_undef, 1, 0); |
4127a31c | 1223 | return swash_fetch(*swash, (U8 *)p, TRUE) != 0; |
5082993f NC |
1224 | } |
1225 | ||
1226 | bool | |
1227 | Perl_is_utf8_alnum(pTHX_ U8 *p) | |
1228 | { | |
1229 | /* NOTE: "IsWord", not "IsAlnum", since Alnum is a true | |
1230 | * descendant of isalnum(3), in other words, it doesn't | |
1231 | * contain the '_'. --jhi */ | |
43b2f713 | 1232 | return is_utf8_common(p, &PL_utf8_alnum, "IsWord"); |
a0ed51b3 LW |
1233 | } |
1234 | ||
1235 | bool | |
b8c5462f JH |
1236 | Perl_is_utf8_alnumc(pTHX_ U8 *p) |
1237 | { | |
43b2f713 | 1238 | return is_utf8_common(p, &PL_utf8_alnumc, "IsAlnumC"); |
b8c5462f JH |
1239 | } |
1240 | ||
1241 | bool | |
82686b01 | 1242 | Perl_is_utf8_idfirst(pTHX_ U8 *p) /* The naming is historical. */ |
a0ed51b3 | 1243 | { |
82686b01 JH |
1244 | if (*p == '_') |
1245 | return TRUE; | |
5082993f | 1246 | /* is_utf8_idstart would be more logical. */ |
43b2f713 | 1247 | return is_utf8_common(p, &PL_utf8_idstart, "IdStart"); |
82686b01 JH |
1248 | } |
1249 | ||
1250 | bool | |
1251 | Perl_is_utf8_idcont(pTHX_ U8 *p) | |
1252 | { | |
1253 | if (*p == '_') | |
1254 | return TRUE; | |
43b2f713 | 1255 | return is_utf8_common(p, &PL_utf8_idcont, "IdContinue"); |
a0ed51b3 LW |
1256 | } |
1257 | ||
1258 | bool | |
864dbfa3 | 1259 | Perl_is_utf8_alpha(pTHX_ U8 *p) |
a0ed51b3 | 1260 | { |
43b2f713 | 1261 | return is_utf8_common(p, &PL_utf8_alpha, "IsAlpha"); |
a0ed51b3 LW |
1262 | } |
1263 | ||
1264 | bool | |
b8c5462f JH |
1265 | Perl_is_utf8_ascii(pTHX_ U8 *p) |
1266 | { | |
43b2f713 | 1267 | return is_utf8_common(p, &PL_utf8_ascii, "IsAscii"); |
b8c5462f JH |
1268 | } |
1269 | ||
1270 | bool | |
864dbfa3 | 1271 | Perl_is_utf8_space(pTHX_ U8 *p) |
a0ed51b3 | 1272 | { |
43b2f713 | 1273 | return is_utf8_common(p, &PL_utf8_space, "IsSpacePerl"); |
a0ed51b3 LW |
1274 | } |
1275 | ||
1276 | bool | |
864dbfa3 | 1277 | Perl_is_utf8_digit(pTHX_ U8 *p) |
a0ed51b3 | 1278 | { |
43b2f713 | 1279 | return is_utf8_common(p, &PL_utf8_digit, "IsDigit"); |
a0ed51b3 LW |
1280 | } |
1281 | ||
1282 | bool | |
864dbfa3 | 1283 | Perl_is_utf8_upper(pTHX_ U8 *p) |
a0ed51b3 | 1284 | { |
43b2f713 | 1285 | return is_utf8_common(p, &PL_utf8_upper, "IsUppercase"); |
a0ed51b3 LW |
1286 | } |
1287 | ||
1288 | bool | |
864dbfa3 | 1289 | Perl_is_utf8_lower(pTHX_ U8 *p) |
a0ed51b3 | 1290 | { |
43b2f713 | 1291 | return is_utf8_common(p, &PL_utf8_lower, "IsLowercase"); |
a0ed51b3 LW |
1292 | } |
1293 | ||
1294 | bool | |
b8c5462f JH |
1295 | Perl_is_utf8_cntrl(pTHX_ U8 *p) |
1296 | { | |
43b2f713 | 1297 | return is_utf8_common(p, &PL_utf8_cntrl, "IsCntrl"); |
b8c5462f JH |
1298 | } |
1299 | ||
1300 | bool | |
1301 | Perl_is_utf8_graph(pTHX_ U8 *p) | |
1302 | { | |
43b2f713 | 1303 | return is_utf8_common(p, &PL_utf8_graph, "IsGraph"); |
b8c5462f JH |
1304 | } |
1305 | ||
1306 | bool | |
864dbfa3 | 1307 | Perl_is_utf8_print(pTHX_ U8 *p) |
a0ed51b3 | 1308 | { |
43b2f713 | 1309 | return is_utf8_common(p, &PL_utf8_print, "IsPrint"); |
a0ed51b3 LW |
1310 | } |
1311 | ||
1312 | bool | |
b8c5462f JH |
1313 | Perl_is_utf8_punct(pTHX_ U8 *p) |
1314 | { | |
43b2f713 | 1315 | return is_utf8_common(p, &PL_utf8_punct, "IsPunct"); |
b8c5462f JH |
1316 | } |
1317 | ||
1318 | bool | |
1319 | Perl_is_utf8_xdigit(pTHX_ U8 *p) | |
1320 | { | |
43b2f713 | 1321 | return is_utf8_common(p, &PL_utf8_xdigit, "Isxdigit"); |
b8c5462f JH |
1322 | } |
1323 | ||
1324 | bool | |
864dbfa3 | 1325 | Perl_is_utf8_mark(pTHX_ U8 *p) |
a0ed51b3 | 1326 | { |
43b2f713 | 1327 | return is_utf8_common(p, &PL_utf8_mark, "IsM"); |
a0ed51b3 LW |
1328 | } |
1329 | ||
6b5c0936 JH |
1330 | /* |
1331 | =for apidoc A|UV|to_utf8_case|U8 *p|U8* ustrp|STRLEN *lenp|SV **swash|char *normal|char *special | |
1332 | ||
1333 | The "p" contains the pointer to the UTF-8 string encoding | |
1334 | the character that is being converted. | |
1335 | ||
1336 | The "ustrp" is a pointer to the character buffer to put the | |
1337 | conversion result to. The "lenp" is a pointer to the length | |
1338 | of the result. | |
1339 | ||
0134edef | 1340 | The "swashp" is a pointer to the swash to use. |
6b5c0936 | 1341 | |
0134edef | 1342 | Both the special and normal mappings are stored lib/unicore/To/Foo.pl, |
ef049b7c | 1343 | and loaded by SWASHNEW, using lib/utf8_heavy.pl. The special (usually, |
0134edef | 1344 | but not always, a multicharacter mapping), is tried first. |
6b5c0936 | 1345 | |
0134edef JH |
1346 | The "special" is a string like "utf8::ToSpecLower", which means the |
1347 | hash %utf8::ToSpecLower. The access to the hash is through | |
1348 | Perl_to_utf8_case(). | |
6b5c0936 | 1349 | |
0134edef JH |
1350 | The "normal" is a string like "ToLower" which means the swash |
1351 | %utf8::ToLower. | |
1352 | ||
1353 | =cut */ | |
6b5c0936 | 1354 | |
2104c8d9 | 1355 | UV |
a6872d42 | 1356 | Perl_to_utf8_case(pTHX_ U8 *p, U8* ustrp, STRLEN *lenp, SV **swashp, char *normal, char *special) |
a0ed51b3 | 1357 | { |
a2a469f9 | 1358 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1]; |
0134edef | 1359 | STRLEN len = 0; |
a0ed51b3 | 1360 | |
c9dc1ff4 | 1361 | const UV uv0 = utf8_to_uvchr(p, NULL); |
1feea2c7 JH |
1362 | /* The NATIVE_TO_UNI() and UNI_TO_NATIVE() mappings |
1363 | * are necessary in EBCDIC, they are redundant no-ops | |
1364 | * in ASCII-ish platforms, and hopefully optimized away. */ | |
24c2fff4 | 1365 | const UV uv1 = NATIVE_TO_UNI(uv0); |
1feea2c7 | 1366 | uvuni_to_utf8(tmpbuf, uv1); |
0134edef JH |
1367 | |
1368 | if (!*swashp) /* load on-demand */ | |
1369 | *swashp = swash_init("utf8", normal, &PL_sv_undef, 4, 0); | |
1370 | ||
08952adc JH |
1371 | /* The 0xDF is the only special casing Unicode code point below 0x100. */ |
1372 | if (special && (uv1 == 0xDF || uv1 > 0xFF)) { | |
0134edef | 1373 | /* It might be "special" (sometimes, but not always, |
2a37f04d | 1374 | * a multicharacter mapping) */ |
8e7b0921 | 1375 | HV * const hv = get_hv(special, FALSE); |
08952adc JH |
1376 | SV **svp; |
1377 | ||
8e7b0921 | 1378 | if (hv && |
08952adc JH |
1379 | (svp = hv_fetch(hv, (const char*)tmpbuf, UNISKIP(uv1), FALSE)) && |
1380 | (*svp)) { | |
71a0dd65 | 1381 | const char *s; |
47654450 | 1382 | |
71a0dd65 | 1383 | s = SvPV_const(*svp, len); |
47654450 JH |
1384 | if (len == 1) |
1385 | len = uvuni_to_utf8(ustrp, NATIVE_TO_UNI(*(U8*)s)) - ustrp; | |
2a37f04d | 1386 | else { |
2f9475ad JH |
1387 | #ifdef EBCDIC |
1388 | /* If we have EBCDIC we need to remap the characters | |
1389 | * since any characters in the low 256 are Unicode | |
1390 | * code points, not EBCDIC. */ | |
7cda7a3d | 1391 | U8 *t = (U8*)s, *tend = t + len, *d; |
2f9475ad JH |
1392 | |
1393 | d = tmpbuf; | |
08952adc | 1394 | if (SvUTF8(*svp)) { |
2f9475ad JH |
1395 | STRLEN tlen = 0; |
1396 | ||
1397 | while (t < tend) { | |
43b2f713 | 1398 | const UV c = utf8_to_uvchr(t, &tlen); |
2f9475ad JH |
1399 | if (tlen > 0) { |
1400 | d = uvchr_to_utf8(d, UNI_TO_NATIVE(c)); | |
1401 | t += tlen; | |
1402 | } | |
1403 | else | |
1404 | break; | |
1405 | } | |
1406 | } | |
1407 | else { | |
36fec512 JH |
1408 | while (t < tend) { |
1409 | d = uvchr_to_utf8(d, UNI_TO_NATIVE(*t)); | |
1410 | t++; | |
1411 | } | |
2f9475ad JH |
1412 | } |
1413 | len = d - tmpbuf; | |
1414 | Copy(tmpbuf, ustrp, len, U8); | |
1415 | #else | |
d2dcd0fb | 1416 | Copy(s, ustrp, len, U8); |
2f9475ad | 1417 | #endif |
29e98929 | 1418 | } |
983ffd37 | 1419 | } |
0134edef JH |
1420 | } |
1421 | ||
1422 | if (!len && *swashp) { | |
43b2f713 AL |
1423 | const UV uv2 = swash_fetch(*swashp, tmpbuf, TRUE); |
1424 | ||
0134edef JH |
1425 | if (uv2) { |
1426 | /* It was "normal" (a single character mapping). */ | |
43b2f713 | 1427 | const UV uv3 = UNI_TO_NATIVE(uv2); |
e9101d72 | 1428 | len = uvchr_to_utf8(ustrp, uv3) - ustrp; |
2a37f04d JH |
1429 | } |
1430 | } | |
1feea2c7 | 1431 | |
0134edef JH |
1432 | if (!len) /* Neither: just copy. */ |
1433 | len = uvchr_to_utf8(ustrp, uv0) - ustrp; | |
1434 | ||
2a37f04d JH |
1435 | if (lenp) |
1436 | *lenp = len; | |
1437 | ||
0134edef | 1438 | return len ? utf8_to_uvchr(ustrp, 0) : 0; |
a0ed51b3 LW |
1439 | } |
1440 | ||
d3e79532 JH |
1441 | /* |
1442 | =for apidoc A|UV|to_utf8_upper|U8 *p|U8 *ustrp|STRLEN *lenp | |
1443 | ||
1444 | Convert the UTF-8 encoded character at p to its uppercase version and | |
1445 | store that in UTF-8 in ustrp and its length in bytes in lenp. Note | |
a2a469f9 JH |
1446 | that the ustrp needs to be at least UTF8_MAXBYTES_CASE+1 bytes since |
1447 | the uppercase version may be longer than the original character. | |
d3e79532 JH |
1448 | |
1449 | The first character of the uppercased version is returned | |
1450 | (but note, as explained above, that there may be more.) | |
1451 | ||
1452 | =cut */ | |
1453 | ||
2104c8d9 | 1454 | UV |
983ffd37 | 1455 | Perl_to_utf8_upper(pTHX_ U8 *p, U8* ustrp, STRLEN *lenp) |
a0ed51b3 | 1456 | { |
983ffd37 | 1457 | return Perl_to_utf8_case(aTHX_ p, ustrp, lenp, |
b4e400f9 | 1458 | &PL_utf8_toupper, "ToUpper", "utf8::ToSpecUpper"); |
983ffd37 | 1459 | } |
a0ed51b3 | 1460 | |
d3e79532 JH |
1461 | /* |
1462 | =for apidoc A|UV|to_utf8_title|U8 *p|U8 *ustrp|STRLEN *lenp | |
1463 | ||
1464 | Convert the UTF-8 encoded character at p to its titlecase version and | |
1465 | store that in UTF-8 in ustrp and its length in bytes in lenp. Note | |
a2a469f9 JH |
1466 | that the ustrp needs to be at least UTF8_MAXBYTES_CASE+1 bytes since the |
1467 | titlecase version may be longer than the original character. | |
d3e79532 JH |
1468 | |
1469 | The first character of the titlecased version is returned | |
1470 | (but note, as explained above, that there may be more.) | |
1471 | ||
1472 | =cut */ | |
1473 | ||
983ffd37 JH |
1474 | UV |
1475 | Perl_to_utf8_title(pTHX_ U8 *p, U8* ustrp, STRLEN *lenp) | |
1476 | { | |
1477 | return Perl_to_utf8_case(aTHX_ p, ustrp, lenp, | |
b4e400f9 | 1478 | &PL_utf8_totitle, "ToTitle", "utf8::ToSpecTitle"); |
a0ed51b3 LW |
1479 | } |
1480 | ||
d3e79532 JH |
1481 | /* |
1482 | =for apidoc A|UV|to_utf8_lower|U8 *p|U8 *ustrp|STRLEN *lenp | |
1483 | ||
1484 | Convert the UTF-8 encoded character at p to its lowercase version and | |
1485 | store that in UTF-8 in ustrp and its length in bytes in lenp. Note | |
a2a469f9 JH |
1486 | that the ustrp needs to be at least UTF8_MAXBYTES_CASE+1 bytes since the |
1487 | lowercase version may be longer than the original character. | |
d3e79532 JH |
1488 | |
1489 | The first character of the lowercased version is returned | |
1490 | (but note, as explained above, that there may be more.) | |
1491 | ||
1492 | =cut */ | |
1493 | ||
2104c8d9 | 1494 | UV |
a2a2844f | 1495 | Perl_to_utf8_lower(pTHX_ U8 *p, U8* ustrp, STRLEN *lenp) |
a0ed51b3 | 1496 | { |
983ffd37 | 1497 | return Perl_to_utf8_case(aTHX_ p, ustrp, lenp, |
b4e400f9 JH |
1498 | &PL_utf8_tolower, "ToLower", "utf8::ToSpecLower"); |
1499 | } | |
1500 | ||
d3e79532 JH |
1501 | /* |
1502 | =for apidoc A|UV|to_utf8_fold|U8 *p|U8 *ustrp|STRLEN *lenp | |
1503 | ||
1504 | Convert the UTF-8 encoded character at p to its foldcase version and | |
1505 | store that in UTF-8 in ustrp and its length in bytes in lenp. Note | |
a2a469f9 | 1506 | that the ustrp needs to be at least UTF8_MAXBYTES_CASE+1 bytes since the |
d3e79532 JH |
1507 | foldcase version may be longer than the original character (up to |
1508 | three characters). | |
1509 | ||
1510 | The first character of the foldcased version is returned | |
1511 | (but note, as explained above, that there may be more.) | |
1512 | ||
1513 | =cut */ | |
1514 | ||
b4e400f9 JH |
1515 | UV |
1516 | Perl_to_utf8_fold(pTHX_ U8 *p, U8* ustrp, STRLEN *lenp) | |
1517 | { | |
1518 | return Perl_to_utf8_case(aTHX_ p, ustrp, lenp, | |
1519 | &PL_utf8_tofold, "ToFold", "utf8::ToSpecFold"); | |
a0ed51b3 LW |
1520 | } |
1521 | ||
ef049b7c TS |
1522 | /* Note: |
1523 | * A "swash" is a swatch hash. | |
1524 | * A "swatch" is a bit vector generated by utf8.c:S_swash_get(). | |
1525 | * C<pkg> is a pointer to a package name for SWASHNEW, should be "utf8". | |
1526 | * For other parameters, see utf8::SWASHNEW in lib/utf8_heavy.pl. | |
1527 | */ | |
a0ed51b3 | 1528 | SV* |
864dbfa3 | 1529 | Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none) |
a0ed51b3 LW |
1530 | { |
1531 | SV* retval; | |
e7b555a6 | 1532 | SV* const tokenbufsv = sv_newmortal(); |
8e84507e | 1533 | dSP; |
1f49be52 AL |
1534 | const size_t pkg_len = strlen(pkg); |
1535 | const size_t name_len = strlen(name); | |
c9dc1ff4 | 1536 | HV * const stash = gv_stashpvn(pkg, pkg_len, FALSE); |
f8be5cf0 | 1537 | SV* errsv_save; |
ce3b816e | 1538 | |
f66b99ab NC |
1539 | PUSHSTACKi(PERLSI_MAGIC); |
1540 | ENTER; | |
1541 | SAVEI32(PL_hints); | |
1542 | PL_hints = 0; | |
1543 | save_re_context(); | |
1b026014 | 1544 | if (!gv_fetchmeth(stash, "SWASHNEW", 8, -1)) { /* demand load utf8 */ |
ce3b816e | 1545 | ENTER; |
f8be5cf0 | 1546 | errsv_save = newSVsv(ERRSV); |
50dbc71b NC |
1547 | /* It is assumed that callers of this routine are not passing in any |
1548 | user derived data. */ | |
1549 | /* Need to do this after save_re_context() as it will set PL_tainted to | |
1550 | 1 while saving $1 etc (see the code after getrx: in Perl_magic_get). | |
1551 | Even line to create errsv_save can turn on PL_tainted. */ | |
1552 | SAVEBOOL(PL_tainted); | |
1553 | PL_tainted = 0; | |
b035a42e | 1554 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpvn(pkg,pkg_len), |
0e2d6244 | 1555 | NULL); |
f8be5cf0 JH |
1556 | if (!SvTRUE(ERRSV)) |
1557 | sv_setsv(ERRSV, errsv_save); | |
1558 | SvREFCNT_dec(errsv_save); | |
ce3b816e GS |
1559 | LEAVE; |
1560 | } | |
1561 | SPAGAIN; | |
a0ed51b3 LW |
1562 | PUSHMARK(SP); |
1563 | EXTEND(SP,5); | |
b035a42e NC |
1564 | PUSHs(sv_2mortal(newSVpvn(pkg, pkg_len))); |
1565 | PUSHs(sv_2mortal(newSVpvn(name, name_len))); | |
a0ed51b3 LW |
1566 | PUSHs(listsv); |
1567 | PUSHs(sv_2mortal(newSViv(minbits))); | |
1568 | PUSHs(sv_2mortal(newSViv(none))); | |
1569 | PUTBACK; | |
ef7b71f0 | 1570 | if (IN_PERL_COMPILETIME) { |
bf1fed83 | 1571 | /* XXX ought to be handled by lex_start */ |
82686b01 | 1572 | SAVEI32(PL_in_my); |
5b7ea690 | 1573 | PL_in_my = 0; |
bf1fed83 | 1574 | sv_setpv(tokenbufsv, PL_tokenbuf); |
82686b01 | 1575 | } |
f8be5cf0 | 1576 | errsv_save = newSVsv(ERRSV); |
864dbfa3 | 1577 | if (call_method("SWASHNEW", G_SCALAR)) |
8e84507e | 1578 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 | 1579 | else |
e24b16f9 | 1580 | retval = &PL_sv_undef; |
f8be5cf0 JH |
1581 | if (!SvTRUE(ERRSV)) |
1582 | sv_setsv(ERRSV, errsv_save); | |
1583 | SvREFCNT_dec(errsv_save); | |
a0ed51b3 LW |
1584 | LEAVE; |
1585 | POPSTACK; | |
ef7b71f0 | 1586 | if (IN_PERL_COMPILETIME) { |
bf1fed83 | 1587 | STRLEN len; |
c9dc1ff4 | 1588 | const char* const pv = SvPV_const(tokenbufsv, len); |
bf1fed83 JH |
1589 | |
1590 | Copy(pv, PL_tokenbuf, len+1, char); | |
2cb86c03 | 1591 | CopHINTS_set(PL_curcop, PL_hints); |
a0ed51b3 | 1592 | } |
bc45ce41 JH |
1593 | if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV) { |
1594 | if (SvPOK(retval)) | |
c293eb2b | 1595 | Perl_croak(aTHX_ "Can't find Unicode property definition \"%"SVf"\"", |
f2139bd3 | 1596 | (void*)retval); |
cea2e8a9 | 1597 | Perl_croak(aTHX_ "SWASHNEW didn't return an HV ref"); |
bc45ce41 | 1598 | } |
a0ed51b3 LW |
1599 | return retval; |
1600 | } | |
1601 | ||
035d37be JH |
1602 | |
1603 | /* This API is wrong for special case conversions since we may need to | |
1604 | * return several Unicode characters for a single Unicode character | |
1605 | * (see lib/unicore/SpecCase.txt) The SWASHGET in lib/utf8_heavy.pl is | |
1606 | * the lower-level routine, and it is similarly broken for returning | |
1607 | * multiple values. --jhi */ | |
ef049b7c TS |
1608 | /* Now SWASHGET is recasted into S_swash_get in this file. */ |
1609 | ||
1610 | /* Note: | |
1611 | * Returns the value of property/mapping C<swash> for the first character | |
1612 | * of the string C<ptr>. If C<do_utf8> is true, the string C<ptr> is | |
1613 | * assumed to be in utf8. If C<do_utf8> is false, the string C<ptr> is | |
1614 | * assumed to be in native 8-bit encoding. Caches the swatch in C<swash>. | |
1615 | */ | |
a0ed51b3 | 1616 | UV |
ef049b7c | 1617 | Perl_swash_fetch(pTHX_ SV *swash, U8 *ptr, bool do_utf8) |
a0ed51b3 | 1618 | { |
ef049b7c | 1619 | HV* const hv = (HV*)SvRV(swash); |
3568d838 JH |
1620 | U32 klen; |
1621 | U32 off; | |
a0ed51b3 | 1622 | STRLEN slen; |
7d85a32c | 1623 | STRLEN needents; |
71a0dd65 | 1624 | const U8 *tmps = NULL; |
a0ed51b3 | 1625 | U32 bit; |
ef049b7c | 1626 | SV *swatch; |
3568d838 | 1627 | U8 tmputf8[2]; |
8e7b0921 | 1628 | const UV c = NATIVE_TO_ASCII(*ptr); |
3568d838 JH |
1629 | |
1630 | if (!do_utf8 && !UNI_IS_INVARIANT(c)) { | |
ef049b7c TS |
1631 | tmputf8[0] = (U8)UTF8_EIGHT_BIT_HI(c); |
1632 | tmputf8[1] = (U8)UTF8_EIGHT_BIT_LO(c); | |
1633 | ptr = tmputf8; | |
3568d838 JH |
1634 | } |
1635 | /* Given a UTF-X encoded char 0xAA..0xYY,0xZZ | |
1636 | * then the "swatch" is a vec() for al the chars which start | |
1637 | * with 0xAA..0xYY | |
1638 | * So the key in the hash (klen) is length of encoded char -1 | |
1639 | */ | |
1640 | klen = UTF8SKIP(ptr) - 1; | |
1641 | off = ptr[klen]; | |
a0ed51b3 | 1642 | |
ef049b7c | 1643 | if (klen == 0) { |
7d85a32c | 1644 | /* If char in invariant then swatch is for all the invariant chars |
cd458e05 | 1645 | * In both UTF-8 and UTF-8-MOD that happens to be UTF_CONTINUATION_MARK |
7d85a32c | 1646 | */ |
ef049b7c TS |
1647 | needents = UTF_CONTINUATION_MARK; |
1648 | off = NATIVE_TO_UTF(ptr[klen]); | |
1649 | } | |
1650 | else { | |
7d85a32c | 1651 | /* If char is encoded then swatch is for the prefix */ |
ef049b7c TS |
1652 | needents = (1 << UTF_ACCUMULATION_SHIFT); |
1653 | off = NATIVE_TO_UTF(ptr[klen]) & UTF_CONTINUATION_MASK; | |
1654 | } | |
7d85a32c | 1655 | |
a0ed51b3 LW |
1656 | /* |
1657 | * This single-entry cache saves about 1/3 of the utf8 overhead in test | |
1658 | * suite. (That is, only 7-8% overall over just a hash cache. Still, | |
1659 | * it's nothing to sniff at.) Pity we usually come through at least | |
1660 | * two function calls to get here... | |
1661 | * | |
1662 | * NB: this code assumes that swatches are never modified, once generated! | |
1663 | */ | |
1664 | ||
3568d838 | 1665 | if (hv == PL_last_swash_hv && |
a0ed51b3 | 1666 | klen == PL_last_swash_klen && |
fe20fd30 | 1667 | (!klen || memEQ((char *)ptr, (char *)PL_last_swash_key, klen)) ) |
a0ed51b3 LW |
1668 | { |
1669 | tmps = PL_last_swash_tmps; | |
1670 | slen = PL_last_swash_slen; | |
1671 | } | |
1672 | else { | |
1673 | /* Try our second-level swatch cache, kept in a hash. */ | |
c05e0e2f | 1674 | SV** svp = hv_fetch(hv, (const char*)ptr, klen, FALSE); |
a0ed51b3 | 1675 | |
ef049b7c TS |
1676 | /* If not cached, generate it via swash_get */ |
1677 | if (!svp || !SvPOK(*svp) | |
1678 | || !(tmps = (const U8*)SvPV_const(*svp, slen))) { | |
2b9d42f0 NIS |
1679 | /* We use utf8n_to_uvuni() as we want an index into |
1680 | Unicode tables, not a native character number. | |
1681 | */ | |
c9dc1ff4 | 1682 | const UV code_point = utf8n_to_uvuni(ptr, UTF8_MAXBYTES, 0, |
872c91ae JH |
1683 | ckWARN(WARN_UTF8) ? |
1684 | 0 : UTF8_ALLOW_ANY); | |
ef049b7c TS |
1685 | swatch = swash_get(swash, |
1686 | /* On EBCDIC & ~(0xA0-1) isn't a useful thing to do */ | |
1687 | (klen) ? (code_point & ~(needents - 1)) : 0, | |
1688 | needents); | |
1689 | ||
ef7b71f0 | 1690 | if (IN_PERL_COMPILETIME) |
2cb86c03 | 1691 | CopHINTS_set(PL_curcop, PL_hints); |
a0ed51b3 | 1692 | |
ef049b7c | 1693 | svp = hv_store(hv, (const char *)ptr, klen, swatch, 0); |
a0ed51b3 | 1694 | |
ef049b7c TS |
1695 | if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) |
1696 | || (slen << 3) < needents) | |
1697 | Perl_croak(aTHX_ "panic: swash_fetch got improper swatch"); | |
a0ed51b3 LW |
1698 | } |
1699 | ||
1700 | PL_last_swash_hv = hv; | |
1701 | PL_last_swash_klen = klen; | |
71a0dd65 NC |
1702 | /* FIXME change interpvar.h? */ |
1703 | PL_last_swash_tmps = (U8 *) tmps; | |
a0ed51b3 LW |
1704 | PL_last_swash_slen = slen; |
1705 | if (klen) | |
1706 | Copy(ptr, PL_last_swash_key, klen, U8); | |
1707 | } | |
1708 | ||
9faf8d75 | 1709 | switch ((int)((slen << 3) / needents)) { |
a0ed51b3 LW |
1710 | case 1: |
1711 | bit = 1 << (off & 7); | |
1712 | off >>= 3; | |
1713 | return (tmps[off] & bit) != 0; | |
1714 | case 8: | |
1715 | return tmps[off]; | |
1716 | case 16: | |
1717 | off <<= 1; | |
1718 | return (tmps[off] << 8) + tmps[off + 1] ; | |
1719 | case 32: | |
1720 | off <<= 2; | |
1721 | return (tmps[off] << 24) + (tmps[off+1] << 16) + (tmps[off+2] << 8) + tmps[off + 3] ; | |
1722 | } | |
ef049b7c | 1723 | Perl_croak(aTHX_ "panic: swash_fetch got swatch of unexpected bit width"); |
75056b2a | 1724 | NORETURN_FUNCTION_END; |
a0ed51b3 | 1725 | } |
2b9d42f0 | 1726 | |
ef049b7c TS |
1727 | /* Note: |
1728 | * Returns a swatch (a bit vector string) for a code point sequence | |
1729 | * that starts from the value C<start> and comprises the number C<span>. | |
1730 | * A C<swash> must be an object created by SWASHNEW (see lib/utf8_heavy.pl). | |
1731 | * Should be used via swash_fetch, which will cache the swatch in C<swash>. | |
1732 | */ | |
1733 | STATIC SV* | |
1734 | S_swash_get(pTHX_ SV* swash, UV start, UV span) | |
1735 | { | |
1736 | SV *swatch; | |
1737 | U8 *l, *lend, *x, *xend, *s; | |
1738 | STRLEN lcur, xcur, scur; | |
1739 | ||
1740 | HV* const hv = (HV*)SvRV(swash); | |
d7559646 AL |
1741 | SV** const listsvp = hv_fetchs(hv, "LIST", FALSE); |
1742 | SV** const typesvp = hv_fetchs(hv, "TYPE", FALSE); | |
1743 | SV** const bitssvp = hv_fetchs(hv, "BITS", FALSE); | |
1744 | SV** const nonesvp = hv_fetchs(hv, "NONE", FALSE); | |
1745 | SV** const extssvp = hv_fetchs(hv, "EXTRAS", FALSE); | |
8c89da26 AL |
1746 | const U8* const typestr = (U8*)SvPV_nolen(*typesvp); |
1747 | const int typeto = typestr[0] == 'T' && typestr[1] == 'o'; | |
1748 | const STRLEN bits = SvUV(*bitssvp); | |
1749 | const STRLEN octets = bits >> 3; /* if bits == 1, then octets == 0 */ | |
1750 | const UV none = SvUV(*nonesvp); | |
1751 | const UV end = start + span; | |
ef049b7c TS |
1752 | |
1753 | if (bits != 1 && bits != 8 && bits != 16 && bits != 32) { | |
1754 | Perl_croak(aTHX_ "panic: swash_get doesn't expect bits %"UVuf, | |
1755 | (UV)bits); | |
1756 | } | |
1757 | ||
1758 | /* create and initialize $swatch */ | |
d7559646 | 1759 | swatch = newSVpvs(""); |
ef049b7c TS |
1760 | scur = octets ? (span * octets) : (span + 7) / 8; |
1761 | SvGROW(swatch, scur + 1); | |
1762 | s = (U8*)SvPVX(swatch); | |
1763 | if (octets && none) { | |
8c89da26 | 1764 | const U8* const e = s + scur; |
ef049b7c TS |
1765 | while (s < e) { |
1766 | if (bits == 8) | |
1767 | *s++ = (U8)(none & 0xff); | |
1768 | else if (bits == 16) { | |
1769 | *s++ = (U8)((none >> 8) & 0xff); | |
1770 | *s++ = (U8)( none & 0xff); | |
1771 | } | |
1772 | else if (bits == 32) { | |
1773 | *s++ = (U8)((none >> 24) & 0xff); | |
1774 | *s++ = (U8)((none >> 16) & 0xff); | |
1775 | *s++ = (U8)((none >> 8) & 0xff); | |
1776 | *s++ = (U8)( none & 0xff); | |
1777 | } | |
1778 | } | |
1779 | *s = '\0'; | |
1780 | } | |
1781 | else { | |
1782 | (void)memzero((U8*)s, scur + 1); | |
1783 | } | |
1784 | SvCUR_set(swatch, scur); | |
1785 | s = (U8*)SvPVX(swatch); | |
1786 | ||
1787 | /* read $swash->{LIST} */ | |
1788 | l = (U8*)SvPV(*listsvp, lcur); | |
1789 | lend = l + lcur; | |
1790 | while (l < lend) { | |
8e7b0921 | 1791 | UV min, max, val; |
ef049b7c TS |
1792 | STRLEN numlen; |
1793 | I32 flags = PERL_SCAN_SILENT_ILLDIGIT | PERL_SCAN_DISALLOW_PREFIX; | |
1794 | ||
8c89da26 | 1795 | U8* const nl = (U8*)memchr(l, '\n', lend - l); |
ef049b7c TS |
1796 | |
1797 | numlen = lend - l; | |
1798 | min = grok_hex((char *)l, &numlen, &flags, NULL); | |
1799 | if (numlen) | |
1800 | l += numlen; | |
1801 | else if (nl) { | |
1802 | l = nl + 1; /* 1 is length of "\n" */ | |
1803 | continue; | |
1804 | } | |
1805 | else { | |
1806 | l = lend; /* to LIST's end at which \n is not found */ | |
1807 | break; | |
1808 | } | |
1809 | ||
1810 | if (isBLANK(*l)) { | |
1811 | ++l; | |
1812 | flags = PERL_SCAN_SILENT_ILLDIGIT | PERL_SCAN_DISALLOW_PREFIX; | |
1813 | numlen = lend - l; | |
1814 | max = grok_hex((char *)l, &numlen, &flags, NULL); | |
1815 | if (numlen) | |
1816 | l += numlen; | |
1817 | else | |
1818 | max = min; | |
1819 | ||
1820 | if (octets) { | |
1821 | if (isBLANK(*l)) { | |
1822 | ++l; | |
1823 | flags = PERL_SCAN_SILENT_ILLDIGIT | | |
1824 | PERL_SCAN_DISALLOW_PREFIX; | |
1825 | numlen = lend - l; | |
1826 | val = grok_hex((char *)l, &numlen, &flags, NULL); | |
1827 | if (numlen) | |
1828 | l += numlen; | |
1829 | else | |
1830 | val = 0; | |
1831 | } | |
1832 | else { | |
1833 | val = 0; | |
1834 | if (typeto) { | |
1835 | Perl_croak(aTHX_ "%s: illegal mapping '%s'", | |
1836 | typestr, l); | |
1837 | } | |
1838 | } | |
1839 | } | |
1840 | else | |
1841 | val = 0; /* bits == 1, then val should be ignored */ | |
1842 | } | |
1843 | else { | |
1844 | max = min; | |
1845 | if (octets) { | |
1846 | val = 0; | |
1847 | if (typeto) { | |
1848 | Perl_croak(aTHX_ "%s: illegal mapping '%s'", typestr, l); | |
1849 | } | |
1850 | } | |
1851 | else | |
1852 | val = 0; /* bits == 1, then val should be ignored */ | |
1853 | } | |
1854 | ||
1855 | if (nl) | |
1856 | l = nl + 1; | |
1857 | else | |
1858 | l = lend; | |
1859 | ||
1860 | if (max < start) | |
1861 | continue; | |
1862 | ||
1863 | if (octets) { | |
8e7b0921 | 1864 | UV key; |
ef049b7c TS |
1865 | if (min < start) { |
1866 | if (!none || val < none) { | |
1867 | val += start - min; | |
1868 | } | |
1869 | min = start; | |
1870 | } | |
1871 | for (key = min; key <= max; key++) { | |
1872 | STRLEN offset; | |
1873 | if (key >= end) | |
1874 | goto go_out_list; | |
1875 | /* offset must be non-negative (start <= min <= key < end) */ | |
1876 | offset = octets * (key - start); | |
1877 | if (bits == 8) | |
1878 | s[offset] = (U8)(val & 0xff); | |
1879 | else if (bits == 16) { | |
1880 | s[offset ] = (U8)((val >> 8) & 0xff); | |
1881 | s[offset + 1] = (U8)( val & 0xff); | |
1882 | } | |
1883 | else if (bits == 32) { | |
1884 | s[offset ] = (U8)((val >> 24) & 0xff); | |
1885 | s[offset + 1] = (U8)((val >> 16) & 0xff); | |
1886 | s[offset + 2] = (U8)((val >> 8) & 0xff); | |
1887 | s[offset + 3] = (U8)( val & 0xff); | |
1888 | } | |
1889 | ||
1890 | if (!none || val < none) | |
1891 | ++val; | |
1892 | } | |
1893 | } | |
1894 | else { /* bits == 1, then val should be ignored */ | |
8e7b0921 | 1895 | UV key; |
ef049b7c TS |
1896 | if (min < start) |
1897 | min = start; | |
1898 | for (key = min; key <= max; key++) { | |
8c89da26 | 1899 | const STRLEN offset = (STRLEN)(key - start); |
ef049b7c TS |
1900 | if (key >= end) |
1901 | goto go_out_list; | |
1902 | s[offset >> 3] |= 1 << (offset & 7); | |
1903 | } | |
1904 | } | |
1905 | } /* while */ | |
1906 | go_out_list: | |
1907 | ||
1908 | /* read $swash->{EXTRAS} */ | |
1909 | x = (U8*)SvPV(*extssvp, xcur); | |
1910 | xend = x + xcur; | |
1911 | while (x < xend) { | |
1912 | STRLEN namelen; | |
1913 | U8 *namestr; | |
1914 | SV** othersvp; | |
1915 | HV* otherhv; | |
1916 | STRLEN otherbits; | |
1917 | SV **otherbitssvp, *other; | |
1918 | U8 *s, *o, *nl; | |
1919 | STRLEN slen, olen; | |
1920 | ||
8e7b0921 | 1921 | const U8 opc = *x++; |
ef049b7c TS |
1922 | if (opc == '\n') |
1923 | continue; | |
1924 | ||
1925 | nl = (U8*)memchr(x, '\n', xend - x); | |
1926 | ||
1927 | if (opc != '-' && opc != '+' && opc != '!' && opc != '&') { | |
1928 | if (nl) { | |
1929 | x = nl + 1; /* 1 is length of "\n" */ | |
1930 | continue; | |
1931 | } | |
1932 | else { | |
1933 | x = xend; /* to EXTRAS' end at which \n is not found */ | |
1934 | break; | |
1935 | } | |
1936 | } | |
1937 | ||
1938 | namestr = x; | |
1939 | if (nl) { | |
1940 | namelen = nl - namestr; | |
1941 | x = nl + 1; | |
1942 | } | |
1943 | else { | |
1944 | namelen = xend - namestr; | |
1945 | x = xend; | |
1946 | } | |
1947 | ||
1948 | othersvp = hv_fetch(hv, (char *)namestr, namelen, FALSE); | |
1949 | otherhv = (HV*)SvRV(*othersvp); | |
d7559646 | 1950 | otherbitssvp = hv_fetchs(otherhv, "BITS", FALSE); |
ef049b7c TS |
1951 | otherbits = (STRLEN)SvUV(*otherbitssvp); |
1952 | if (bits < otherbits) | |
1953 | Perl_croak(aTHX_ "panic: swash_get found swatch size mismatch"); | |
1954 | ||
1955 | /* The "other" swatch must be destroyed after. */ | |
1956 | other = swash_get(*othersvp, start, span); | |
1957 | o = (U8*)SvPV(other, olen); | |
1958 | ||
1959 | if (!olen) | |
1960 | Perl_croak(aTHX_ "panic: swash_get got improper swatch"); | |
1961 | ||
1962 | s = (U8*)SvPV(swatch, slen); | |
1963 | if (bits == 1 && otherbits == 1) { | |
1964 | if (slen != olen) | |
1965 | Perl_croak(aTHX_ "panic: swash_get found swatch length mismatch"); | |
1966 | ||
1967 | switch (opc) { | |
1968 | case '+': | |
1969 | while (slen--) | |
1970 | *s++ |= *o++; | |
1971 | break; | |
1972 | case '!': | |
1973 | while (slen--) | |
1974 | *s++ |= ~*o++; | |
1975 | break; | |
1976 | case '-': | |
1977 | while (slen--) | |
1978 | *s++ &= ~*o++; | |
1979 | break; | |
1980 | case '&': | |
1981 | while (slen--) | |
1982 | *s++ &= *o++; | |
1983 | break; | |
1984 | default: | |
1985 | break; | |
1986 | } | |
1987 | } | |
1988 | else { | |
1989 | STRLEN otheroctets = otherbits >> 3; | |
1990 | STRLEN offset = 0; | |
8e7b0921 | 1991 | U8* const send = s + slen; |
ef049b7c TS |
1992 | |
1993 | while (s < send) { | |
1994 | UV otherval = 0; | |
1995 | ||
1996 | if (otherbits == 1) { | |
1997 | otherval = (o[offset >> 3] >> (offset & 7)) & 1; | |
1998 | ++offset; | |
1999 | } | |
2000 | else { | |
2001 | STRLEN vlen = otheroctets; | |
2002 | otherval = *o++; | |
2003 | while (--vlen) { | |
2004 | otherval <<= 8; | |
2005 | otherval |= *o++; | |
2006 | } | |
2007 | } | |
2008 | ||
2009 | if (opc == '+' && otherval) | |
c9c8c8e1 | 2010 | NOOP; /* replace with otherval */ |
ef049b7c TS |
2011 | else if (opc == '!' && !otherval) |
2012 | otherval = 1; | |
2013 | else if (opc == '-' && otherval) | |
2014 | otherval = 0; | |
2015 | else if (opc == '&' && !otherval) | |
2016 | otherval = 0; | |
2017 | else { | |
2018 | s += octets; /* no replacement */ | |
2019 | continue; | |
2020 | } | |
2021 | ||
2022 | if (bits == 8) | |
2023 | *s++ = (U8)( otherval & 0xff); | |
2024 | else if (bits == 16) { | |
2025 | *s++ = (U8)((otherval >> 8) & 0xff); | |
2026 | *s++ = (U8)( otherval & 0xff); | |
2027 | } | |
2028 | else if (bits == 32) { | |
2029 | *s++ = (U8)((otherval >> 24) & 0xff); | |
2030 | *s++ = (U8)((otherval >> 16) & 0xff); | |
2031 | *s++ = (U8)((otherval >> 8) & 0xff); | |
2032 | *s++ = (U8)( otherval & 0xff); | |
2033 | } | |
2034 | } | |
2035 | } | |
2036 | sv_free(other); /* through with it! */ | |
2037 | } /* while */ | |
2038 | return swatch; | |
2039 | } | |
2040 | ||
5082993f NC |
2041 | /* |
2042 | =for apidoc A|U8 *|uvchr_to_utf8|U8 *d|UV uv | |
2043 | ||
2044 | Adds the UTF-8 representation of the Native codepoint C<uv> to the end | |
2045 | of the string C<d>; C<d> should be have at least C<UTF8_MAXBYTES+1> free | |
2046 | bytes available. The return value is the pointer to the byte after the | |
2047 | end of the new character. In other words, | |
2048 | ||
2049 | d = uvchr_to_utf8(d, uv); | |
2050 | ||
2051 | is the recommended wide native character-aware way of saying | |
2052 | ||
2053 | *(d++) = uv; | |
2054 | ||
2055 | =cut | |
2056 | */ | |
2057 | ||
2058 | /* On ASCII machines this is normally a macro but we want a | |
2059 | real function in case XS code wants it | |
2060 | */ | |
2061 | U8 * | |
2062 | Perl_uvchr_to_utf8(pTHX_ U8 *d, UV uv) | |
2063 | { | |
2064 | return Perl_uvuni_to_utf8_flags(aTHX_ d, NATIVE_TO_UNI(uv), 0); | |
2065 | } | |
2066 | ||
b851fbc1 JH |
2067 | U8 * |
2068 | Perl_uvchr_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags) | |
2069 | { | |
2070 | return Perl_uvuni_to_utf8_flags(aTHX_ d, NATIVE_TO_UNI(uv), flags); | |
2071 | } | |
2b9d42f0 NIS |
2072 | |
2073 | /* | |
5082993f NC |
2074 | =for apidoc A|UV|utf8n_to_uvchr|U8 *s|STRLEN curlen|STRLEN *retlen|U32 |
2075 | flags | |
2076 | ||
2077 | Returns the native character value of the first character in the string | |
2078 | C<s> | |
2079 | which is assumed to be in UTF-8 encoding; C<retlen> will be set to the | |
2080 | length, in bytes, of that character. | |
2081 | ||
2082 | Allows length and flags to be passed to low level routine. | |
2083 | ||
2084 | =cut | |
2085 | */ | |
2086 | /* On ASCII machines this is normally a macro but we want | |
2087 | a real function in case XS code wants it | |
2088 | */ | |
2089 | UV | |
2090 | Perl_utf8n_to_uvchr(pTHX_ U8 *s, STRLEN curlen, STRLEN *retlen, U32 flags) | |
2091 | { | |
2092 | const UV uv = Perl_utf8n_to_uvuni(aTHX_ s, curlen, retlen, flags); | |
2093 | return UNI_TO_NATIVE(uv); | |
2094 | } | |
2095 | ||
2096 | /* | |
d2cc3551 JH |
2097 | =for apidoc A|char *|pv_uni_display|SV *dsv|U8 *spv|STRLEN len|STRLEN pvlim|UV flags |
2098 | ||
2099 | Build to the scalar dsv a displayable version of the string spv, | |
2100 | length len, the displayable version being at most pvlim bytes long | |
2101 | (if longer, the rest is truncated and "..." will be appended). | |
0a2ef054 | 2102 | |
9e55ce06 | 2103 | The flags argument can have UNI_DISPLAY_ISPRINT set to display |
00e86452 | 2104 | isPRINT()able characters as themselves, UNI_DISPLAY_BACKSLASH |
0a2ef054 JH |
2105 | to display the \\[nrfta\\] as the backslashed versions (like '\n') |
2106 | (UNI_DISPLAY_BACKSLASH is preferred over UNI_DISPLAY_ISPRINT for \\). | |
2107 | UNI_DISPLAY_QQ (and its alias UNI_DISPLAY_REGEX) have both | |
2108 | UNI_DISPLAY_BACKSLASH and UNI_DISPLAY_ISPRINT turned on. | |
2109 | ||
d2cc3551 JH |
2110 | The pointer to the PV of the dsv is returned. |
2111 | ||
2112 | =cut */ | |
e6b2e755 JH |
2113 | char * |
2114 | Perl_pv_uni_display(pTHX_ SV *dsv, U8 *spv, STRLEN len, STRLEN pvlim, UV flags) | |
2115 | { | |
2116 | int truncated = 0; | |
c05e0e2f | 2117 | const char *s, *e; |
e6b2e755 JH |
2118 | |
2119 | sv_setpvn(dsv, "", 0); | |
c05e0e2f | 2120 | for (s = (const char *)spv, e = s + len; s < e; s += UTF8SKIP(s)) { |
e6b2e755 | 2121 | UV u; |
04851bb3 NC |
2122 | /* This serves double duty as a flag and a character to print after |
2123 | a \ when flags & UNI_DISPLAY_BACKSLASH is true. | |
2124 | */ | |
2125 | char ok = 0; | |
c728cb41 | 2126 | |
e6b2e755 JH |
2127 | if (pvlim && SvCUR(dsv) >= pvlim) { |
2128 | truncated++; | |
2129 | break; | |
2130 | } | |
2131 | u = utf8_to_uvchr((U8*)s, 0); | |
c728cb41 | 2132 | if (u < 256) { |
8c18bf38 | 2133 | const unsigned char c = (unsigned char)u & 0xFF; |
8c89da26 | 2134 | if (flags & UNI_DISPLAY_BACKSLASH) { |
04851bb3 | 2135 | switch (c) { |
c728cb41 | 2136 | case '\n': |
04851bb3 | 2137 | ok = 'n'; break; |
c728cb41 | 2138 | case '\r': |
04851bb3 | 2139 | ok = 'r'; break; |
c728cb41 | 2140 | case '\t': |
04851bb3 | 2141 | ok = 't'; break; |
c728cb41 | 2142 | case '\f': |
04851bb3 | 2143 | ok = 'f'; break; |
c728cb41 | 2144 | case '\a': |
04851bb3 | 2145 | ok = 'a'; break; |
c728cb41 | 2146 | case '\\': |
04851bb3 | 2147 | ok = '\\'; break; |
c728cb41 JH |
2148 | default: break; |
2149 | } | |
04851bb3 NC |
2150 | if (ok) { |
2151 | Perl_sv_catpvf(aTHX_ dsv, "\\%c", ok); | |
2152 | } | |
c728cb41 | 2153 | } |
00e86452 | 2154 | /* isPRINT() is the locale-blind version. */ |
04851bb3 NC |
2155 | if (!ok && (flags & UNI_DISPLAY_ISPRINT) && isPRINT(c)) { |
2156 | Perl_sv_catpvf(aTHX_ dsv, "%c", c); | |
2157 | ok = 1; | |
0a2ef054 | 2158 | } |
c728cb41 JH |
2159 | } |
2160 | if (!ok) | |
9e55ce06 | 2161 | Perl_sv_catpvf(aTHX_ dsv, "\\x{%"UVxf"}", u); |
e6b2e755 JH |
2162 | } |
2163 | if (truncated) | |
d7559646 | 2164 | sv_catpvs(dsv, "..."); |
e6b2e755 JH |
2165 | |
2166 | return SvPVX(dsv); | |
2167 | } | |
2b9d42f0 | 2168 | |
d2cc3551 JH |
2169 | /* |
2170 | =for apidoc A|char *|sv_uni_display|SV *dsv|SV *ssv|STRLEN pvlim|UV flags | |
2171 | ||
2172 | Build to the scalar dsv a displayable version of the scalar sv, | |
0a2ef054 | 2173 | the displayable version being at most pvlim bytes long |
d2cc3551 | 2174 | (if longer, the rest is truncated and "..." will be appended). |
0a2ef054 JH |
2175 | |
2176 | The flags argument is as in pv_uni_display(). | |
2177 | ||
d2cc3551 JH |
2178 | The pointer to the PV of the dsv is returned. |
2179 | ||
43b2f713 AL |
2180 | =cut |
2181 | */ | |
e6b2e755 JH |
2182 | char * |
2183 | Perl_sv_uni_display(pTHX_ SV *dsv, SV *ssv, STRLEN pvlim, UV flags) | |
2184 | { | |
ed6a78eb | 2185 | return Perl_pv_uni_display(aTHX_ dsv, (U8*)SvPVX_const(ssv), |
71a0dd65 | 2186 | SvCUR(ssv), pvlim, flags); |
701a277b JH |
2187 | } |
2188 | ||
d2cc3551 | 2189 | /* |
d07ddd77 | 2190 | =for apidoc A|I32|ibcmp_utf8|const char *s1|char **pe1|register UV l1|bool u1|const char *s2|char **pe2|register UV l2|bool u2 |
d2cc3551 JH |
2191 | |
2192 | Return true if the strings s1 and s2 differ case-insensitively, false | |
2193 | if not (if they are equal case-insensitively). If u1 is true, the | |
2194 | string s1 is assumed to be in UTF-8-encoded Unicode. If u2 is true, | |
d07ddd77 JH |
2195 | the string s2 is assumed to be in UTF-8-encoded Unicode. If u1 or u2 |
2196 | are false, the respective string is assumed to be in native 8-bit | |
2197 | encoding. | |
2198 | ||
2199 | If the pe1 and pe2 are non-NULL, the scanning pointers will be copied | |
2200 | in there (they will point at the beginning of the I<next> character). | |
2201 | If the pointers behind pe1 or pe2 are non-NULL, they are the end | |
2202 | pointers beyond which scanning will not continue under any | |
359e6eb4 | 2203 | circumstances. If the byte lengths l1 and l2 are non-zero, s1+l1 and |
d07ddd77 JH |
2204 | s2+l2 will be used as goal end pointers that will also stop the scan, |
2205 | and which qualify towards defining a successful match: all the scans | |
2206 | that define an explicit length must reach their goal pointers for | |
2207 | a match to succeed). | |
d2cc3551 JH |
2208 | |
2209 | For case-insensitiveness, the "casefolding" of Unicode is used | |
2210 | instead of upper/lowercasing both the characters, see | |
2211 | http://www.unicode.org/unicode/reports/tr21/ (Case Mappings). | |
2212 | ||
2213 | =cut */ | |
701a277b | 2214 | I32 |
d07ddd77 | 2215 | Perl_ibcmp_utf8(pTHX_ const char *s1, char **pe1, register UV l1, bool u1, const char *s2, char **pe2, register UV l2, bool u2) |
332ddc25 | 2216 | { |
c05e0e2f AL |
2217 | register const U8 *p1 = (const U8*)s1; |
2218 | register const U8 *p2 = (const U8*)s2; | |
4358d444 | 2219 | register const U8 *f1 = NULL; |
0bfdb59a | 2220 | register const U8 *f2 = NULL; |
4358d444 NC |
2221 | register U8 *e1 = NULL; |
2222 | register U8 *q1 = NULL; | |
2223 | register U8 *e2 = NULL; | |
2224 | register U8 *q2 = NULL; | |
d07ddd77 | 2225 | STRLEN n1 = 0, n2 = 0; |
a2a469f9 JH |
2226 | U8 foldbuf1[UTF8_MAXBYTES_CASE+1]; |
2227 | U8 foldbuf2[UTF8_MAXBYTES_CASE+1]; | |
d7f013c8 JH |
2228 | U8 natbuf[1+1]; |
2229 | STRLEN foldlen1, foldlen2; | |
d07ddd77 | 2230 | bool match; |
332ddc25 | 2231 | |
d07ddd77 JH |
2232 | if (pe1) |
2233 | e1 = *(U8**)pe1; | |
c05e0e2f AL |
2234 | if (e1 == 0 || (l1 && l1 < (UV)(e1 - (const U8*)s1))) |
2235 | f1 = (const U8*)s1 + l1; | |
d07ddd77 JH |
2236 | if (pe2) |
2237 | e2 = *(U8**)pe2; | |
c05e0e2f AL |
2238 | if (e2 == 0 || (l2 && l2 < (UV)(e2 - (const U8*)s2))) |
2239 | f2 = (const U8*)s2 + l2; | |
d07ddd77 JH |
2240 | |
2241 | if ((e1 == 0 && f1 == 0) || (e2 == 0 && f2 == 0) || (f1 == 0 && f2 == 0)) | |
2242 | return 1; /* mismatch; possible infinite loop or false positive */ | |
2243 | ||
a6872d42 JH |
2244 | if (!u1 || !u2) |
2245 | natbuf[1] = 0; /* Need to terminate the buffer. */ | |
2246 | ||
d07ddd77 JH |
2247 | while ((e1 == 0 || p1 < e1) && |
2248 | (f1 == 0 || p1 < f1) && | |
2249 | (e2 == 0 || p2 < e2) && | |
2250 | (f2 == 0 || p2 < f2)) { | |
2251 | if (n1 == 0) { | |
d7f013c8 | 2252 | if (u1) |
ed6a78eb | 2253 | to_utf8_fold((U8 *)p1, foldbuf1, &foldlen1); |
d7f013c8 | 2254 | else { |
e0138122 | 2255 | uvuni_to_utf8(natbuf, (UV) NATIVE_TO_UNI(((UV)*p1))); |
d7f013c8 JH |
2256 | to_utf8_fold(natbuf, foldbuf1, &foldlen1); |
2257 | } | |
2258 | q1 = foldbuf1; | |
d07ddd77 | 2259 | n1 = foldlen1; |
332ddc25 | 2260 | } |
d07ddd77 | 2261 | if (n2 == 0) { |
d7f013c8 | 2262 | if (u2) |
ed6a78eb | 2263 | to_utf8_fold((U8 *)p2, foldbuf2, &foldlen2); |
d7f013c8 | 2264 | else { |
e0138122 | 2265 | uvuni_to_utf8(natbuf, (UV) NATIVE_TO_UNI(((UV)*p2))); |
d7f013c8 JH |
2266 | to_utf8_fold(natbuf, foldbuf2, &foldlen2); |
2267 | } | |
2268 | q2 = foldbuf2; | |
d07ddd77 | 2269 | n2 = foldlen2; |
332ddc25 | 2270 | } |
d07ddd77 JH |
2271 | while (n1 && n2) { |
2272 | if ( UTF8SKIP(q1) != UTF8SKIP(q2) || | |
2273 | (UTF8SKIP(q1) == 1 && *q1 != *q2) || | |
2274 | memNE((char*)q1, (char*)q2, UTF8SKIP(q1)) ) | |
d7f013c8 | 2275 | return 1; /* mismatch */ |
d07ddd77 | 2276 | n1 -= UTF8SKIP(q1); |
d7f013c8 | 2277 | q1 += UTF8SKIP(q1); |
d07ddd77 | 2278 | n2 -= UTF8SKIP(q2); |
d7f013c8 | 2279 | q2 += UTF8SKIP(q2); |
701a277b | 2280 | } |
d07ddd77 | 2281 | if (n1 == 0) |
d7f013c8 | 2282 | p1 += u1 ? UTF8SKIP(p1) : 1; |
d07ddd77 | 2283 | if (n2 == 0) |
d7f013c8 JH |
2284 | p2 += u2 ? UTF8SKIP(p2) : 1; |
2285 | ||
d2cc3551 | 2286 | } |
5469e704 | 2287 | |
d07ddd77 JH |
2288 | /* A match is defined by all the scans that specified |
2289 | * an explicit length reaching their final goals. */ | |
2290 | match = (f1 == 0 || p1 == f1) && (f2 == 0 || p2 == f2); | |
5469e704 JH |
2291 | |
2292 | if (match) { | |
d07ddd77 JH |
2293 | if (pe1) |
2294 | *pe1 = (char*)p1; | |
2295 | if (pe2) | |
2296 | *pe2 = (char*)p2; | |
5469e704 JH |
2297 | } |
2298 | ||
2299 | return match ? 0 : 1; /* 0 match, 1 mismatch */ | |
e6b2e755 | 2300 | } |
701a277b | 2301 | |
04851bb3 NC |
2302 | /* |
2303 | * Local variables: | |
2304 | * c-indentation-style: bsd | |
2305 | * c-basic-offset: 4 | |
2306 | * indent-tabs-mode: t | |
2307 | * End: | |
2308 | * | |
d8294a4d NC |
2309 | * ex: set ts=8 sts=4 sw=4 noet: |
2310 | */ |