Commit | Line | Data |
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a0ed51b3 LW |
1 | /* utf8.c |
2 | * | |
3818b22b | 3 | * Copyright (c) 1998-2000, Larry Wall |
a0ed51b3 LW |
4 | * |
5 | * You may distribute under the terms of either the GNU General Public | |
6 | * License or the Artistic License, as specified in the README file. | |
7 | * | |
8 | */ | |
9 | ||
10 | /* | |
11 | * 'What a fix!' said Sam. 'That's the one place in all the lands we've ever | |
12 | * heard of that we don't want to see any closer; and that's the one place | |
13 | * we're trying to get to! And that's just where we can't get, nohow.' | |
14 | * | |
15 | * 'Well do I understand your speech,' he answered in the same language; | |
16 | * 'yet few strangers do so. Why then do you not speak in the Common Tongue, | |
17 | * as is the custom in the West, if you wish to be answered?' | |
18 | * | |
19 | * ...the travellers perceived that the floor was paved with stones of many | |
20 | * hues; branching runes and strange devices intertwined beneath their feet. | |
21 | */ | |
22 | ||
23 | #include "EXTERN.h" | |
864dbfa3 | 24 | #define PERL_IN_UTF8_C |
a0ed51b3 LW |
25 | #include "perl.h" |
26 | ||
27 | /* Unicode support */ | |
28 | ||
dfe13c55 | 29 | U8 * |
ad391ad9 | 30 | Perl_uv_to_utf8(pTHX_ U8 *d, UV uv) /* the d must be UTF8_MAXLEN+1 deep */ |
a0ed51b3 LW |
31 | { |
32 | if (uv < 0x80) { | |
33 | *d++ = uv; | |
ad391ad9 | 34 | *d = 0; |
a0ed51b3 LW |
35 | return d; |
36 | } | |
37 | if (uv < 0x800) { | |
38 | *d++ = (( uv >> 6) | 0xc0); | |
39 | *d++ = (( uv & 0x3f) | 0x80); | |
ad391ad9 | 40 | *d = 0; |
a0ed51b3 LW |
41 | return d; |
42 | } | |
43 | if (uv < 0x10000) { | |
44 | *d++ = (( uv >> 12) | 0xe0); | |
45 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
46 | *d++ = (( uv & 0x3f) | 0x80); | |
ad391ad9 | 47 | *d = 0; |
a0ed51b3 LW |
48 | return d; |
49 | } | |
50 | if (uv < 0x200000) { | |
51 | *d++ = (( uv >> 18) | 0xf0); | |
52 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
53 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
54 | *d++ = (( uv & 0x3f) | 0x80); | |
ad391ad9 | 55 | *d = 0; |
a0ed51b3 LW |
56 | return d; |
57 | } | |
58 | if (uv < 0x4000000) { | |
59 | *d++ = (( uv >> 24) | 0xf8); | |
60 | *d++ = (((uv >> 18) & 0x3f) | 0x80); | |
61 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
62 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
63 | *d++ = (( uv & 0x3f) | 0x80); | |
ad391ad9 | 64 | *d = 0; |
a0ed51b3 LW |
65 | return d; |
66 | } | |
67 | if (uv < 0x80000000) { | |
68 | *d++ = (( uv >> 30) | 0xfc); | |
69 | *d++ = (((uv >> 24) & 0x3f) | 0x80); | |
70 | *d++ = (((uv >> 18) & 0x3f) | 0x80); | |
71 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
72 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
73 | *d++ = (( uv & 0x3f) | 0x80); | |
ad391ad9 | 74 | *d = 0; |
a0ed51b3 LW |
75 | return d; |
76 | } | |
6b8eaf93 | 77 | #ifdef HAS_QUAD |
d7578b48 | 78 | if (uv < UTF8_QUAD_MAX) |
a0ed51b3 LW |
79 | #endif |
80 | { | |
81 | *d++ = 0xfe; /* Can't match U+FEFF! */ | |
82 | *d++ = (((uv >> 30) & 0x3f) | 0x80); | |
83 | *d++ = (((uv >> 24) & 0x3f) | 0x80); | |
84 | *d++ = (((uv >> 18) & 0x3f) | 0x80); | |
85 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
86 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
87 | *d++ = (( uv & 0x3f) | 0x80); | |
ad391ad9 | 88 | *d = 0; |
a0ed51b3 LW |
89 | return d; |
90 | } | |
6b8eaf93 | 91 | #ifdef HAS_QUAD |
a0ed51b3 LW |
92 | { |
93 | *d++ = 0xff; /* Can't match U+FFFE! */ | |
3c77ea2b GS |
94 | *d++ = 0x80; /* 6 Reserved bits */ |
95 | *d++ = (((uv >> 60) & 0x0f) | 0x80); /* 2 Reserved bits */ | |
96 | *d++ = (((uv >> 54) & 0x3f) | 0x80); | |
97 | *d++ = (((uv >> 48) & 0x3f) | 0x80); | |
98 | *d++ = (((uv >> 42) & 0x3f) | 0x80); | |
a0ed51b3 LW |
99 | *d++ = (((uv >> 36) & 0x3f) | 0x80); |
100 | *d++ = (((uv >> 30) & 0x3f) | 0x80); | |
101 | *d++ = (((uv >> 24) & 0x3f) | 0x80); | |
102 | *d++ = (((uv >> 18) & 0x3f) | 0x80); | |
103 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
104 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
105 | *d++ = (( uv & 0x3f) | 0x80); | |
ad391ad9 | 106 | *d = 0; |
a0ed51b3 LW |
107 | return d; |
108 | } | |
109 | #endif | |
110 | } | |
111 | ||
386d01d6 GS |
112 | /* Tests if some arbitrary number of bytes begins in a valid UTF-8 character. |
113 | * The actual number of bytes in the UTF-8 character will be returned if it | |
114 | * is valid, otherwise 0. */ | |
067a85ef | 115 | STRLEN |
386d01d6 GS |
116 | Perl_is_utf8_char(pTHX_ U8 *s) |
117 | { | |
118 | U8 u = *s; | |
067a85ef A |
119 | STRLEN slen, len; |
120 | UV uv, ouv; | |
386d01d6 | 121 | |
067a85ef | 122 | if (u <= 0x7f) |
386d01d6 GS |
123 | return 1; |
124 | ||
067a85ef | 125 | if (u >= 0x80 && u <= 0xbf) |
386d01d6 GS |
126 | return 0; |
127 | ||
9f07fdcd | 128 | len = UTF8SKIP(s); |
386d01d6 | 129 | |
067a85ef A |
130 | if (len < 2 || (u >= 0xc0 && u <= 0xfd && s[1] < 0x80)) |
131 | return 0; | |
132 | ||
386d01d6 GS |
133 | slen = len - 1; |
134 | s++; | |
067a85ef A |
135 | uv = u; |
136 | ouv = uv; | |
386d01d6 GS |
137 | while (slen--) { |
138 | if ((*s & 0xc0) != 0x80) | |
139 | return 0; | |
067a85ef A |
140 | uv = (uv << 6) | (*s & 0x3f); |
141 | if (uv < ouv) | |
142 | return 0; | |
143 | ouv = uv; | |
386d01d6 GS |
144 | s++; |
145 | } | |
067a85ef | 146 | |
5bbb0b5a | 147 | if (UNISKIP(uv) < len) |
067a85ef A |
148 | return 0; |
149 | ||
386d01d6 GS |
150 | return len; |
151 | } | |
152 | ||
6662521e | 153 | /* |
b2a2e44b | 154 | =for apidoc Am|is_utf8_string|U8 *s|STRLEN len |
6662521e GS |
155 | |
156 | Returns true if first C<len> bytes of the given string form valid a UTF8 | |
157 | string, false otherwise. | |
158 | ||
159 | =cut | |
160 | */ | |
161 | ||
8e84507e | 162 | bool |
6662521e GS |
163 | Perl_is_utf8_string(pTHX_ U8 *s, STRLEN len) |
164 | { | |
067a85ef A |
165 | U8* x = s; |
166 | U8* send = s + len; | |
167 | STRLEN c; | |
168 | ||
6662521e GS |
169 | while (x < send) { |
170 | c = is_utf8_char(x); | |
067a85ef A |
171 | if (!c) |
172 | return FALSE; | |
6662521e | 173 | x += c; |
067a85ef A |
174 | if (x > send) |
175 | return FALSE; | |
6662521e | 176 | } |
067a85ef A |
177 | |
178 | return TRUE; | |
6662521e GS |
179 | } |
180 | ||
67e989fb | 181 | /* |
be2c7115 | 182 | =for apidoc Am|U8* s|utf8_to_uv|STRLEN curlen|STRLEN *retlen|U32 flags |
67e989fb JH |
183 | |
184 | Returns the character value of the first character in the string C<s> | |
ba210ebe JH |
185 | which is assumed to be in UTF8 encoding and no longer than C<curlen>; |
186 | C<retlen> will be set to the length, in bytes, of that character, | |
187 | and the pointer C<s> will be advanced to the end of the character. | |
67e989fb JH |
188 | |
189 | If C<s> does not point to a well-formed UTF8 character, the behaviour | |
dcad2880 JH |
190 | is dependent on the value of C<flags>: if it contains UTF8_CHECK_ONLY, |
191 | it is assumed that the caller will raise a warning, and this function | |
192 | will set C<retlen> to C<-1> and return. The C<flags> can also contain | |
be2c7115 PP |
193 | various flags to allow deviations from the strict UTF-8 encoding |
194 | (see F<utf8.h>). | |
67e989fb | 195 | |
dcad2880 | 196 | =cut */ |
67e989fb | 197 | |
a0ed51b3 | 198 | UV |
dcad2880 | 199 | Perl_utf8_to_uv(pTHX_ U8* s, STRLEN curlen, STRLEN* retlen, U32 flags) |
a0ed51b3 | 200 | { |
ba210ebe JH |
201 | UV uv = *s, ouv; |
202 | STRLEN len = 1; | |
7bf1b6bb PP |
203 | #ifdef EBCDIC |
204 | bool dowarn = 0; | |
205 | #else | |
ba210ebe | 206 | bool dowarn = ckWARN_d(WARN_UTF8); |
7bf1b6bb | 207 | #endif |
ba210ebe JH |
208 | STRLEN expectlen = 0; |
209 | ||
0c443dc2 JH |
210 | if (curlen == 0) { |
211 | if (dowarn) | |
212 | Perl_warner(aTHX_ WARN_UTF8, | |
213 | "Malformed UTF-8 character (an empty string)"); | |
214 | goto malformed; | |
215 | } | |
216 | ||
ba210ebe | 217 | if (uv <= 0x7f) { /* Pure ASCII. */ |
a0ed51b3 LW |
218 | if (retlen) |
219 | *retlen = 1; | |
220 | return *s; | |
221 | } | |
67e989fb | 222 | |
fcc8fcf6 JH |
223 | if ((uv >= 0x80 && uv <= 0xbf) && |
224 | !(flags & UTF8_ALLOW_CONTINUATION)) { | |
ba210ebe JH |
225 | if (dowarn) |
226 | Perl_warner(aTHX_ WARN_UTF8, | |
efbcad09 | 227 | "Malformed UTF-8 character (unexpected continuation byte 0x%02"UVxf")", |
ba210ebe JH |
228 | uv); |
229 | goto malformed; | |
230 | } | |
231 | ||
0c443dc2 | 232 | if ((uv >= 0xc0 && uv <= 0xfd && curlen > 1 && s[1] < 0x80) && |
fcc8fcf6 | 233 | !(flags & UTF8_ALLOW_NON_CONTINUATION)) { |
ba210ebe JH |
234 | if (dowarn) |
235 | Perl_warner(aTHX_ WARN_UTF8, | |
efbcad09 | 236 | "Malformed UTF-8 character (unexpected non-continuation byte 0x%02"UVxf" after byte 0x%02"UVxf")", |
9e29e5ff | 237 | (UV)s[1], uv); |
ba210ebe JH |
238 | goto malformed; |
239 | } | |
fcc8fcf6 JH |
240 | |
241 | if ((uv == 0xfe || uv == 0xff) && | |
242 | !(flags & UTF8_ALLOW_FE_FF)) { | |
ba210ebe JH |
243 | if (dowarn) |
244 | Perl_warner(aTHX_ WARN_UTF8, | |
efbcad09 | 245 | "Malformed UTF-8 character (byte 0x%02"UVxf")", |
ba210ebe JH |
246 | uv); |
247 | goto malformed; | |
a0ed51b3 | 248 | } |
fcc8fcf6 | 249 | |
ba210ebe JH |
250 | if (!(uv & 0x20)) { len = 2; uv &= 0x1f; } |
251 | else if (!(uv & 0x10)) { len = 3; uv &= 0x0f; } | |
252 | else if (!(uv & 0x08)) { len = 4; uv &= 0x07; } | |
253 | else if (!(uv & 0x04)) { len = 5; uv &= 0x03; } | |
254 | else if (!(uv & 0x02)) { len = 6; uv &= 0x01; } | |
255 | else if (!(uv & 0x01)) { len = 7; uv = 0; } | |
3c77ea2b | 256 | else { len = 13; uv = 0; } /* whoa! */ |
fcc8fcf6 | 257 | |
a0ed51b3 LW |
258 | if (retlen) |
259 | *retlen = len; | |
ba210ebe JH |
260 | |
261 | expectlen = len; | |
262 | ||
fcc8fcf6 JH |
263 | if ((curlen < expectlen) && |
264 | !(flags & UTF8_ALLOW_SHORT)) { | |
ba210ebe JH |
265 | if (dowarn) |
266 | Perl_warner(aTHX_ WARN_UTF8, | |
267 | "Malformed UTF-8 character (%d byte%s, need %d)", | |
0c443dc2 | 268 | curlen, curlen == 1 ? "" : "s", expectlen); |
ba210ebe JH |
269 | goto malformed; |
270 | } | |
271 | ||
272 | len--; | |
a0ed51b3 | 273 | s++; |
ba210ebe JH |
274 | ouv = uv; |
275 | ||
a0ed51b3 LW |
276 | while (len--) { |
277 | if ((*s & 0xc0) != 0x80) { | |
ba210ebe JH |
278 | if (dowarn) |
279 | Perl_warner(aTHX_ WARN_UTF8, | |
280 | "Malformed UTF-8 character (unexpected continuation byte 0x%02x)", | |
281 | *s); | |
282 | goto malformed; | |
a0ed51b3 LW |
283 | } |
284 | else | |
ba210ebe JH |
285 | uv = (uv << 6) | (*s & 0x3f); |
286 | if (uv < ouv) { | |
fcc8fcf6 | 287 | /* This cannot be allowed. */ |
ba210ebe JH |
288 | if (dowarn) |
289 | Perl_warner(aTHX_ WARN_UTF8, | |
290 | "Malformed UTF-8 character (overflow at 0x%"UVxf", byte 0x%02x)", | |
291 | ouv, *s); | |
292 | goto malformed; | |
293 | } | |
294 | s++; | |
295 | ouv = uv; | |
296 | } | |
297 | ||
fcc8fcf6 JH |
298 | if ((uv >= 0xd800 && uv <= 0xdfff) && |
299 | !(flags & UTF8_ALLOW_SURROGATE)) { | |
ba210ebe JH |
300 | if (dowarn) |
301 | Perl_warner(aTHX_ WARN_UTF8, | |
302 | "Malformed UTF-8 character (UTF-16 surrogate 0x%04"UVxf")", | |
303 | uv); | |
304 | goto malformed; | |
fcc8fcf6 JH |
305 | } else if ((uv == 0xfffe) && |
306 | !(flags & UTF8_ALLOW_BOM)) { | |
ba210ebe JH |
307 | if (dowarn) |
308 | Perl_warner(aTHX_ WARN_UTF8, | |
309 | "Malformed UTF-8 character (byte order mark 0x%04"UVxf")", | |
310 | uv); | |
311 | goto malformed; | |
fcc8fcf6 JH |
312 | } else if ((expectlen > UNISKIP(uv)) && |
313 | !(flags & UTF8_ALLOW_LONG)) { | |
ba210ebe JH |
314 | if (dowarn) |
315 | Perl_warner(aTHX_ WARN_UTF8, | |
316 | "Malformed UTF-8 character (%d byte%s, need %d)", | |
0c443dc2 | 317 | expectlen, expectlen == 1 ? "": "s", UNISKIP(uv)); |
ba210ebe | 318 | goto malformed; |
a9917092 JH |
319 | } else if ((uv == 0xffff) && |
320 | !(flags & UTF8_ALLOW_FFFF)) { | |
321 | if (dowarn) | |
322 | Perl_warner(aTHX_ WARN_UTF8, | |
323 | "Malformed UTF-8 character (character 0x%04"UVxf")", | |
324 | uv); | |
325 | goto malformed; | |
a0ed51b3 | 326 | } |
ba210ebe | 327 | |
a0ed51b3 | 328 | return uv; |
ba210ebe JH |
329 | |
330 | malformed: | |
331 | ||
fcc8fcf6 | 332 | if (flags & UTF8_CHECK_ONLY) { |
ba210ebe | 333 | if (retlen) |
cc366d4b | 334 | *retlen = -1; |
ba210ebe JH |
335 | return 0; |
336 | } | |
337 | ||
338 | if (retlen) | |
cc366d4b | 339 | *retlen = expectlen ? expectlen : len; |
ba210ebe JH |
340 | |
341 | return UNICODE_REPLACEMENT_CHARACTER; | |
a0ed51b3 LW |
342 | } |
343 | ||
8e84507e | 344 | /* |
dcad2880 | 345 | =for apidoc Am|U8* s|utf8_to_uv_simple|STRLEN *retlen |
8e84507e NIS |
346 | |
347 | Returns the character value of the first character in the string C<s> | |
348 | which is assumed to be in UTF8 encoding; C<retlen> will be set to the | |
349 | length, in bytes, of that character, and the pointer C<s> will be | |
350 | advanced to the end of the character. | |
351 | ||
ba210ebe JH |
352 | If C<s> does not point to a well-formed UTF8 character, zero is |
353 | returned and retlen is set, if possible, to -1. | |
8e84507e NIS |
354 | |
355 | =cut | |
356 | */ | |
357 | ||
358 | UV | |
dcad2880 | 359 | Perl_utf8_to_uv_simple(pTHX_ U8* s, STRLEN* retlen) |
8e84507e | 360 | { |
2e4dc9fc | 361 | return Perl_utf8_to_uv(aTHX_ s, UTF8_MAXLEN, retlen, 0); |
8e84507e NIS |
362 | } |
363 | ||
b76347f2 JH |
364 | /* |
365 | =for apidoc|utf8_length|U8 *s|U8 *e | |
366 | ||
367 | Return the length of the UTF-8 char encoded string C<s> in characters. | |
02eb7b47 JH |
368 | Stops at C<e> (inclusive). If C<e E<lt> s> or if the scan would end |
369 | up past C<e>, croaks. | |
b76347f2 JH |
370 | |
371 | =cut | |
372 | */ | |
373 | ||
374 | STRLEN | |
375 | Perl_utf8_length(pTHX_ U8* s, U8* e) | |
376 | { | |
377 | STRLEN len = 0; | |
378 | ||
379 | if (e < s) | |
02eb7b47 | 380 | Perl_croak(aTHX_ "panic: utf8_length: unexpected end"); |
b76347f2 | 381 | while (s < e) { |
02eb7b47 | 382 | U8 t = UTF8SKIP(s); |
b76347f2 JH |
383 | |
384 | if (e - s < t) | |
02eb7b47 | 385 | Perl_croak(aTHX_ "panic: utf8_length: unaligned end"); |
b76347f2 JH |
386 | s += t; |
387 | len++; | |
388 | } | |
389 | ||
390 | return len; | |
391 | } | |
392 | ||
246fae53 MG |
393 | /* utf8_distance(a,b) returns the number of UTF8 characters between |
394 | the pointers a and b */ | |
a0ed51b3 | 395 | |
02eb7b47 | 396 | IV |
864dbfa3 | 397 | Perl_utf8_distance(pTHX_ U8 *a, U8 *b) |
a0ed51b3 | 398 | { |
02eb7b47 JH |
399 | IV off = 0; |
400 | ||
a0ed51b3 LW |
401 | if (a < b) { |
402 | while (a < b) { | |
02eb7b47 JH |
403 | U8 c = UTF8SKIP(a); |
404 | ||
405 | if (b - a < c) | |
406 | Perl_croak(aTHX_ "panic: utf8_distance: unaligned end"); | |
407 | a += c; | |
a0ed51b3 LW |
408 | off--; |
409 | } | |
410 | } | |
411 | else { | |
412 | while (b < a) { | |
02eb7b47 JH |
413 | U8 c = UTF8SKIP(b); |
414 | ||
415 | if (a - b < c) | |
416 | Perl_croak(aTHX_ "panic: utf8_distance: unaligned end"); | |
417 | b += c; | |
a0ed51b3 LW |
418 | off++; |
419 | } | |
420 | } | |
02eb7b47 | 421 | |
a0ed51b3 LW |
422 | return off; |
423 | } | |
424 | ||
425 | /* WARNING: do not use the following unless you *know* off is within bounds */ | |
426 | ||
427 | U8 * | |
864dbfa3 | 428 | Perl_utf8_hop(pTHX_ U8 *s, I32 off) |
a0ed51b3 LW |
429 | { |
430 | if (off >= 0) { | |
431 | while (off--) | |
432 | s += UTF8SKIP(s); | |
433 | } | |
434 | else { | |
435 | while (off++) { | |
436 | s--; | |
437 | if (*s & 0x80) { | |
438 | while ((*s & 0xc0) == 0x80) | |
439 | s--; | |
440 | } | |
441 | } | |
442 | } | |
443 | return s; | |
444 | } | |
445 | ||
6940069f | 446 | /* |
246fae53 | 447 | =for apidoc Am|U8 *|utf8_to_bytes|U8 *s|STRLEN *len |
6940069f | 448 | |
246fae53 MG |
449 | Converts a string C<s> of length C<len> from UTF8 into byte encoding. |
450 | Unlike C<bytes_to_utf8>, this over-writes the original string, and | |
451 | updates len to contain the new length. | |
67e989fb | 452 | Returns zero on failure, setting C<len> to -1. |
6940069f GS |
453 | |
454 | =cut | |
455 | */ | |
456 | ||
457 | U8 * | |
246fae53 | 458 | Perl_utf8_to_bytes(pTHX_ U8* s, STRLEN *len) |
6940069f | 459 | { |
6940069f GS |
460 | U8 *send; |
461 | U8 *d; | |
dcad2880 | 462 | U8 *save = s; |
246fae53 MG |
463 | |
464 | /* ensure valid UTF8 and chars < 256 before updating string */ | |
dcad2880 JH |
465 | for (send = s + *len; s < send; ) { |
466 | U8 c = *s++; | |
467 | ||
9f9ab905 | 468 | if (c >= 0x80 && |
dcad2880 JH |
469 | ((s >= send) || |
470 | ((*s++ & 0xc0) != 0x80) || ((c & 0xfe) != 0xc2))) { | |
471 | *len = -1; | |
472 | return 0; | |
473 | } | |
246fae53 | 474 | } |
dcad2880 JH |
475 | |
476 | d = s = save; | |
6940069f | 477 | while (s < send) { |
dcad2880 JH |
478 | if (*s < 0x80) { |
479 | *d++ = *s++; | |
480 | } | |
6940069f | 481 | else { |
ba210ebe | 482 | STRLEN ulen; |
dcad2880 | 483 | *d++ = (U8)utf8_to_uv_simple(s, &ulen); |
6940069f | 484 | s += ulen; |
6940069f GS |
485 | } |
486 | } | |
487 | *d = '\0'; | |
246fae53 | 488 | *len = d - save; |
6940069f GS |
489 | return save; |
490 | } | |
491 | ||
492 | /* | |
6662521e | 493 | =for apidoc Am|U8 *|bytes_to_utf8|U8 *s|STRLEN *len |
6940069f GS |
494 | |
495 | Converts a string C<s> of length C<len> from ASCII into UTF8 encoding. | |
6662521e GS |
496 | Returns a pointer to the newly-created string, and sets C<len> to |
497 | reflect the new length. | |
6940069f | 498 | |
497711e7 | 499 | =cut |
6940069f GS |
500 | */ |
501 | ||
502 | U8* | |
6662521e | 503 | Perl_bytes_to_utf8(pTHX_ U8* s, STRLEN *len) |
6940069f | 504 | { |
6940069f GS |
505 | U8 *send; |
506 | U8 *d; | |
507 | U8 *dst; | |
6662521e | 508 | send = s + (*len); |
6940069f | 509 | |
6662521e | 510 | Newz(801, d, (*len) * 2 + 1, U8); |
6940069f GS |
511 | dst = d; |
512 | ||
513 | while (s < send) { | |
514 | if (*s < 0x80) | |
515 | *d++ = *s++; | |
516 | else { | |
517 | UV uv = *s++; | |
518 | *d++ = (( uv >> 6) | 0xc0); | |
519 | *d++ = (( uv & 0x3f) | 0x80); | |
520 | } | |
521 | } | |
522 | *d = '\0'; | |
6662521e | 523 | *len = d-dst; |
6940069f GS |
524 | return dst; |
525 | } | |
526 | ||
a0ed51b3 | 527 | /* |
dea0fc0b | 528 | * Convert native (big-endian) or reversed (little-endian) UTF-16 to UTF-8. |
a0ed51b3 LW |
529 | * |
530 | * Destination must be pre-extended to 3/2 source. Do not use in-place. | |
531 | * We optimize for native, for obvious reasons. */ | |
532 | ||
533 | U8* | |
dea0fc0b | 534 | Perl_utf16_to_utf8(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 | 535 | { |
dea0fc0b JH |
536 | U8* pend; |
537 | U8* dstart = d; | |
538 | ||
539 | if (bytelen & 1) | |
a7867d0a | 540 | Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen"); |
dea0fc0b JH |
541 | |
542 | pend = p + bytelen; | |
543 | ||
a0ed51b3 | 544 | while (p < pend) { |
dea0fc0b JH |
545 | UV uv = (p[0] << 8) + p[1]; /* UTF-16BE */ |
546 | p += 2; | |
a0ed51b3 LW |
547 | if (uv < 0x80) { |
548 | *d++ = uv; | |
549 | continue; | |
550 | } | |
551 | if (uv < 0x800) { | |
552 | *d++ = (( uv >> 6) | 0xc0); | |
553 | *d++ = (( uv & 0x3f) | 0x80); | |
554 | continue; | |
555 | } | |
556 | if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */ | |
dea0fc0b JH |
557 | UV low = *p++; |
558 | if (low < 0xdc00 || low >= 0xdfff) | |
559 | Perl_croak(aTHX_ "Malformed UTF-16 surrogate"); | |
a0ed51b3 LW |
560 | uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000; |
561 | } | |
562 | if (uv < 0x10000) { | |
563 | *d++ = (( uv >> 12) | 0xe0); | |
564 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
565 | *d++ = (( uv & 0x3f) | 0x80); | |
566 | continue; | |
567 | } | |
568 | else { | |
569 | *d++ = (( uv >> 18) | 0xf0); | |
570 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
571 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
572 | *d++ = (( uv & 0x3f) | 0x80); | |
573 | continue; | |
574 | } | |
575 | } | |
dea0fc0b | 576 | *newlen = d - dstart; |
a0ed51b3 LW |
577 | return d; |
578 | } | |
579 | ||
580 | /* Note: this one is slightly destructive of the source. */ | |
581 | ||
582 | U8* | |
dea0fc0b | 583 | Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 LW |
584 | { |
585 | U8* s = (U8*)p; | |
586 | U8* send = s + bytelen; | |
587 | while (s < send) { | |
588 | U8 tmp = s[0]; | |
589 | s[0] = s[1]; | |
590 | s[1] = tmp; | |
591 | s += 2; | |
592 | } | |
dea0fc0b | 593 | return utf16_to_utf8(p, d, bytelen, newlen); |
a0ed51b3 LW |
594 | } |
595 | ||
596 | /* for now these are all defined (inefficiently) in terms of the utf8 versions */ | |
597 | ||
598 | bool | |
864dbfa3 | 599 | Perl_is_uni_alnum(pTHX_ U32 c) |
a0ed51b3 | 600 | { |
ad391ad9 | 601 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 LW |
602 | uv_to_utf8(tmpbuf, (UV)c); |
603 | return is_utf8_alnum(tmpbuf); | |
604 | } | |
605 | ||
606 | bool | |
b8c5462f JH |
607 | Perl_is_uni_alnumc(pTHX_ U32 c) |
608 | { | |
ad391ad9 | 609 | U8 tmpbuf[UTF8_MAXLEN+1]; |
b8c5462f JH |
610 | uv_to_utf8(tmpbuf, (UV)c); |
611 | return is_utf8_alnumc(tmpbuf); | |
612 | } | |
613 | ||
614 | bool | |
864dbfa3 | 615 | Perl_is_uni_idfirst(pTHX_ U32 c) |
a0ed51b3 | 616 | { |
ad391ad9 | 617 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 LW |
618 | uv_to_utf8(tmpbuf, (UV)c); |
619 | return is_utf8_idfirst(tmpbuf); | |
620 | } | |
621 | ||
622 | bool | |
864dbfa3 | 623 | Perl_is_uni_alpha(pTHX_ U32 c) |
a0ed51b3 | 624 | { |
ad391ad9 | 625 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 LW |
626 | uv_to_utf8(tmpbuf, (UV)c); |
627 | return is_utf8_alpha(tmpbuf); | |
628 | } | |
629 | ||
630 | bool | |
4d61ec05 GS |
631 | Perl_is_uni_ascii(pTHX_ U32 c) |
632 | { | |
ad391ad9 | 633 | U8 tmpbuf[UTF8_MAXLEN+1]; |
4d61ec05 GS |
634 | uv_to_utf8(tmpbuf, (UV)c); |
635 | return is_utf8_ascii(tmpbuf); | |
636 | } | |
637 | ||
638 | bool | |
864dbfa3 | 639 | Perl_is_uni_space(pTHX_ U32 c) |
a0ed51b3 | 640 | { |
ad391ad9 | 641 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 LW |
642 | uv_to_utf8(tmpbuf, (UV)c); |
643 | return is_utf8_space(tmpbuf); | |
644 | } | |
645 | ||
646 | bool | |
864dbfa3 | 647 | Perl_is_uni_digit(pTHX_ U32 c) |
a0ed51b3 | 648 | { |
ad391ad9 | 649 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 LW |
650 | uv_to_utf8(tmpbuf, (UV)c); |
651 | return is_utf8_digit(tmpbuf); | |
652 | } | |
653 | ||
654 | bool | |
864dbfa3 | 655 | Perl_is_uni_upper(pTHX_ U32 c) |
a0ed51b3 | 656 | { |
ad391ad9 | 657 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 LW |
658 | uv_to_utf8(tmpbuf, (UV)c); |
659 | return is_utf8_upper(tmpbuf); | |
660 | } | |
661 | ||
662 | bool | |
864dbfa3 | 663 | Perl_is_uni_lower(pTHX_ U32 c) |
a0ed51b3 | 664 | { |
ad391ad9 | 665 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 LW |
666 | uv_to_utf8(tmpbuf, (UV)c); |
667 | return is_utf8_lower(tmpbuf); | |
668 | } | |
669 | ||
670 | bool | |
b8c5462f JH |
671 | Perl_is_uni_cntrl(pTHX_ U32 c) |
672 | { | |
ad391ad9 | 673 | U8 tmpbuf[UTF8_MAXLEN+1]; |
b8c5462f JH |
674 | uv_to_utf8(tmpbuf, (UV)c); |
675 | return is_utf8_cntrl(tmpbuf); | |
676 | } | |
677 | ||
678 | bool | |
679 | Perl_is_uni_graph(pTHX_ U32 c) | |
680 | { | |
ad391ad9 | 681 | U8 tmpbuf[UTF8_MAXLEN+1]; |
b8c5462f JH |
682 | uv_to_utf8(tmpbuf, (UV)c); |
683 | return is_utf8_graph(tmpbuf); | |
684 | } | |
685 | ||
686 | bool | |
864dbfa3 | 687 | Perl_is_uni_print(pTHX_ U32 c) |
a0ed51b3 | 688 | { |
ad391ad9 | 689 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 LW |
690 | uv_to_utf8(tmpbuf, (UV)c); |
691 | return is_utf8_print(tmpbuf); | |
692 | } | |
693 | ||
b8c5462f | 694 | bool |
f248d071 | 695 | Perl_is_uni_punct(pTHX_ U32 c) |
b8c5462f | 696 | { |
ad391ad9 | 697 | U8 tmpbuf[UTF8_MAXLEN+1]; |
b8c5462f JH |
698 | uv_to_utf8(tmpbuf, (UV)c); |
699 | return is_utf8_punct(tmpbuf); | |
700 | } | |
701 | ||
4d61ec05 GS |
702 | bool |
703 | Perl_is_uni_xdigit(pTHX_ U32 c) | |
704 | { | |
ad391ad9 | 705 | U8 tmpbuf[UTF8_MAXLEN+1]; |
4d61ec05 GS |
706 | uv_to_utf8(tmpbuf, (UV)c); |
707 | return is_utf8_xdigit(tmpbuf); | |
708 | } | |
709 | ||
a0ed51b3 | 710 | U32 |
864dbfa3 | 711 | Perl_to_uni_upper(pTHX_ U32 c) |
a0ed51b3 | 712 | { |
ad391ad9 | 713 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 LW |
714 | uv_to_utf8(tmpbuf, (UV)c); |
715 | return to_utf8_upper(tmpbuf); | |
716 | } | |
717 | ||
718 | U32 | |
864dbfa3 | 719 | Perl_to_uni_title(pTHX_ U32 c) |
a0ed51b3 | 720 | { |
ad391ad9 | 721 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 LW |
722 | uv_to_utf8(tmpbuf, (UV)c); |
723 | return to_utf8_title(tmpbuf); | |
724 | } | |
725 | ||
726 | U32 | |
864dbfa3 | 727 | Perl_to_uni_lower(pTHX_ U32 c) |
a0ed51b3 | 728 | { |
ad391ad9 | 729 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 LW |
730 | uv_to_utf8(tmpbuf, (UV)c); |
731 | return to_utf8_lower(tmpbuf); | |
732 | } | |
733 | ||
734 | /* for now these all assume no locale info available for Unicode > 255 */ | |
735 | ||
736 | bool | |
864dbfa3 | 737 | Perl_is_uni_alnum_lc(pTHX_ U32 c) |
a0ed51b3 LW |
738 | { |
739 | return is_uni_alnum(c); /* XXX no locale support yet */ | |
740 | } | |
741 | ||
742 | bool | |
b8c5462f JH |
743 | Perl_is_uni_alnumc_lc(pTHX_ U32 c) |
744 | { | |
745 | return is_uni_alnumc(c); /* XXX no locale support yet */ | |
746 | } | |
747 | ||
748 | bool | |
864dbfa3 | 749 | Perl_is_uni_idfirst_lc(pTHX_ U32 c) |
a0ed51b3 LW |
750 | { |
751 | return is_uni_idfirst(c); /* XXX no locale support yet */ | |
752 | } | |
753 | ||
754 | bool | |
864dbfa3 | 755 | Perl_is_uni_alpha_lc(pTHX_ U32 c) |
a0ed51b3 LW |
756 | { |
757 | return is_uni_alpha(c); /* XXX no locale support yet */ | |
758 | } | |
759 | ||
760 | bool | |
4d61ec05 GS |
761 | Perl_is_uni_ascii_lc(pTHX_ U32 c) |
762 | { | |
763 | return is_uni_ascii(c); /* XXX no locale support yet */ | |
764 | } | |
765 | ||
766 | bool | |
864dbfa3 | 767 | Perl_is_uni_space_lc(pTHX_ U32 c) |
a0ed51b3 LW |
768 | { |
769 | return is_uni_space(c); /* XXX no locale support yet */ | |
770 | } | |
771 | ||
772 | bool | |
864dbfa3 | 773 | Perl_is_uni_digit_lc(pTHX_ U32 c) |
a0ed51b3 LW |
774 | { |
775 | return is_uni_digit(c); /* XXX no locale support yet */ | |
776 | } | |
777 | ||
778 | bool | |
864dbfa3 | 779 | Perl_is_uni_upper_lc(pTHX_ U32 c) |
a0ed51b3 LW |
780 | { |
781 | return is_uni_upper(c); /* XXX no locale support yet */ | |
782 | } | |
783 | ||
784 | bool | |
864dbfa3 | 785 | Perl_is_uni_lower_lc(pTHX_ U32 c) |
a0ed51b3 LW |
786 | { |
787 | return is_uni_lower(c); /* XXX no locale support yet */ | |
788 | } | |
789 | ||
790 | bool | |
b8c5462f JH |
791 | Perl_is_uni_cntrl_lc(pTHX_ U32 c) |
792 | { | |
793 | return is_uni_cntrl(c); /* XXX no locale support yet */ | |
794 | } | |
795 | ||
796 | bool | |
797 | Perl_is_uni_graph_lc(pTHX_ U32 c) | |
798 | { | |
799 | return is_uni_graph(c); /* XXX no locale support yet */ | |
800 | } | |
801 | ||
802 | bool | |
864dbfa3 | 803 | Perl_is_uni_print_lc(pTHX_ U32 c) |
a0ed51b3 LW |
804 | { |
805 | return is_uni_print(c); /* XXX no locale support yet */ | |
806 | } | |
807 | ||
b8c5462f JH |
808 | bool |
809 | Perl_is_uni_punct_lc(pTHX_ U32 c) | |
810 | { | |
811 | return is_uni_punct(c); /* XXX no locale support yet */ | |
812 | } | |
813 | ||
4d61ec05 GS |
814 | bool |
815 | Perl_is_uni_xdigit_lc(pTHX_ U32 c) | |
816 | { | |
817 | return is_uni_xdigit(c); /* XXX no locale support yet */ | |
818 | } | |
819 | ||
a0ed51b3 | 820 | U32 |
864dbfa3 | 821 | Perl_to_uni_upper_lc(pTHX_ U32 c) |
a0ed51b3 LW |
822 | { |
823 | return to_uni_upper(c); /* XXX no locale support yet */ | |
824 | } | |
825 | ||
826 | U32 | |
864dbfa3 | 827 | Perl_to_uni_title_lc(pTHX_ U32 c) |
a0ed51b3 LW |
828 | { |
829 | return to_uni_title(c); /* XXX no locale support yet */ | |
830 | } | |
831 | ||
832 | U32 | |
864dbfa3 | 833 | Perl_to_uni_lower_lc(pTHX_ U32 c) |
a0ed51b3 LW |
834 | { |
835 | return to_uni_lower(c); /* XXX no locale support yet */ | |
836 | } | |
837 | ||
a0ed51b3 | 838 | bool |
864dbfa3 | 839 | Perl_is_utf8_alnum(pTHX_ U8 *p) |
a0ed51b3 | 840 | { |
386d01d6 GS |
841 | if (!is_utf8_char(p)) |
842 | return FALSE; | |
a0ed51b3 | 843 | if (!PL_utf8_alnum) |
289d4f09 ML |
844 | /* NOTE: "IsWord", not "IsAlnum", since Alnum is a true |
845 | * descendant of isalnum(3), in other words, it doesn't | |
846 | * contain the '_'. --jhi */ | |
847 | PL_utf8_alnum = swash_init("utf8", "IsWord", &PL_sv_undef, 0, 0); | |
a0ed51b3 LW |
848 | return swash_fetch(PL_utf8_alnum, p); |
849 | /* return *p == '_' || is_utf8_alpha(p) || is_utf8_digit(p); */ | |
850 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ | |
851 | if (!PL_utf8_alnum) | |
852 | PL_utf8_alnum = swash_init("utf8", "", | |
853 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); | |
854 | return swash_fetch(PL_utf8_alnum, p); | |
855 | #endif | |
856 | } | |
857 | ||
858 | bool | |
b8c5462f JH |
859 | Perl_is_utf8_alnumc(pTHX_ U8 *p) |
860 | { | |
386d01d6 GS |
861 | if (!is_utf8_char(p)) |
862 | return FALSE; | |
b8c5462f JH |
863 | if (!PL_utf8_alnum) |
864 | PL_utf8_alnum = swash_init("utf8", "IsAlnumC", &PL_sv_undef, 0, 0); | |
865 | return swash_fetch(PL_utf8_alnum, p); | |
866 | /* return is_utf8_alpha(p) || is_utf8_digit(p); */ | |
867 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ | |
868 | if (!PL_utf8_alnum) | |
869 | PL_utf8_alnum = swash_init("utf8", "", | |
870 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); | |
871 | return swash_fetch(PL_utf8_alnum, p); | |
872 | #endif | |
873 | } | |
874 | ||
875 | bool | |
864dbfa3 | 876 | Perl_is_utf8_idfirst(pTHX_ U8 *p) |
a0ed51b3 LW |
877 | { |
878 | return *p == '_' || is_utf8_alpha(p); | |
879 | } | |
880 | ||
881 | bool | |
864dbfa3 | 882 | Perl_is_utf8_alpha(pTHX_ U8 *p) |
a0ed51b3 | 883 | { |
386d01d6 GS |
884 | if (!is_utf8_char(p)) |
885 | return FALSE; | |
a0ed51b3 | 886 | if (!PL_utf8_alpha) |
e24b16f9 | 887 | PL_utf8_alpha = swash_init("utf8", "IsAlpha", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
888 | return swash_fetch(PL_utf8_alpha, p); |
889 | } | |
890 | ||
891 | bool | |
b8c5462f JH |
892 | Perl_is_utf8_ascii(pTHX_ U8 *p) |
893 | { | |
386d01d6 GS |
894 | if (!is_utf8_char(p)) |
895 | return FALSE; | |
b8c5462f JH |
896 | if (!PL_utf8_ascii) |
897 | PL_utf8_ascii = swash_init("utf8", "IsAscii", &PL_sv_undef, 0, 0); | |
898 | return swash_fetch(PL_utf8_ascii, p); | |
899 | } | |
900 | ||
901 | bool | |
864dbfa3 | 902 | Perl_is_utf8_space(pTHX_ U8 *p) |
a0ed51b3 | 903 | { |
386d01d6 GS |
904 | if (!is_utf8_char(p)) |
905 | return FALSE; | |
a0ed51b3 | 906 | if (!PL_utf8_space) |
3bec3564 | 907 | PL_utf8_space = swash_init("utf8", "IsSpacePerl", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
908 | return swash_fetch(PL_utf8_space, p); |
909 | } | |
910 | ||
911 | bool | |
864dbfa3 | 912 | Perl_is_utf8_digit(pTHX_ U8 *p) |
a0ed51b3 | 913 | { |
386d01d6 GS |
914 | if (!is_utf8_char(p)) |
915 | return FALSE; | |
a0ed51b3 | 916 | if (!PL_utf8_digit) |
e24b16f9 | 917 | PL_utf8_digit = swash_init("utf8", "IsDigit", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
918 | return swash_fetch(PL_utf8_digit, p); |
919 | } | |
920 | ||
921 | bool | |
864dbfa3 | 922 | Perl_is_utf8_upper(pTHX_ U8 *p) |
a0ed51b3 | 923 | { |
386d01d6 GS |
924 | if (!is_utf8_char(p)) |
925 | return FALSE; | |
a0ed51b3 | 926 | if (!PL_utf8_upper) |
e24b16f9 | 927 | PL_utf8_upper = swash_init("utf8", "IsUpper", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
928 | return swash_fetch(PL_utf8_upper, p); |
929 | } | |
930 | ||
931 | bool | |
864dbfa3 | 932 | Perl_is_utf8_lower(pTHX_ U8 *p) |
a0ed51b3 | 933 | { |
386d01d6 GS |
934 | if (!is_utf8_char(p)) |
935 | return FALSE; | |
a0ed51b3 | 936 | if (!PL_utf8_lower) |
e24b16f9 | 937 | PL_utf8_lower = swash_init("utf8", "IsLower", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
938 | return swash_fetch(PL_utf8_lower, p); |
939 | } | |
940 | ||
941 | bool | |
b8c5462f JH |
942 | Perl_is_utf8_cntrl(pTHX_ U8 *p) |
943 | { | |
386d01d6 GS |
944 | if (!is_utf8_char(p)) |
945 | return FALSE; | |
b8c5462f JH |
946 | if (!PL_utf8_cntrl) |
947 | PL_utf8_cntrl = swash_init("utf8", "IsCntrl", &PL_sv_undef, 0, 0); | |
948 | return swash_fetch(PL_utf8_cntrl, p); | |
949 | } | |
950 | ||
951 | bool | |
952 | Perl_is_utf8_graph(pTHX_ U8 *p) | |
953 | { | |
386d01d6 GS |
954 | if (!is_utf8_char(p)) |
955 | return FALSE; | |
b8c5462f JH |
956 | if (!PL_utf8_graph) |
957 | PL_utf8_graph = swash_init("utf8", "IsGraph", &PL_sv_undef, 0, 0); | |
958 | return swash_fetch(PL_utf8_graph, p); | |
959 | } | |
960 | ||
961 | bool | |
864dbfa3 | 962 | Perl_is_utf8_print(pTHX_ U8 *p) |
a0ed51b3 | 963 | { |
386d01d6 GS |
964 | if (!is_utf8_char(p)) |
965 | return FALSE; | |
a0ed51b3 | 966 | if (!PL_utf8_print) |
e24b16f9 | 967 | PL_utf8_print = swash_init("utf8", "IsPrint", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
968 | return swash_fetch(PL_utf8_print, p); |
969 | } | |
970 | ||
971 | bool | |
b8c5462f JH |
972 | Perl_is_utf8_punct(pTHX_ U8 *p) |
973 | { | |
386d01d6 GS |
974 | if (!is_utf8_char(p)) |
975 | return FALSE; | |
b8c5462f JH |
976 | if (!PL_utf8_punct) |
977 | PL_utf8_punct = swash_init("utf8", "IsPunct", &PL_sv_undef, 0, 0); | |
978 | return swash_fetch(PL_utf8_punct, p); | |
979 | } | |
980 | ||
981 | bool | |
982 | Perl_is_utf8_xdigit(pTHX_ U8 *p) | |
983 | { | |
386d01d6 GS |
984 | if (!is_utf8_char(p)) |
985 | return FALSE; | |
b8c5462f JH |
986 | if (!PL_utf8_xdigit) |
987 | PL_utf8_xdigit = swash_init("utf8", "IsXDigit", &PL_sv_undef, 0, 0); | |
988 | return swash_fetch(PL_utf8_xdigit, p); | |
989 | } | |
990 | ||
991 | bool | |
864dbfa3 | 992 | Perl_is_utf8_mark(pTHX_ U8 *p) |
a0ed51b3 | 993 | { |
386d01d6 GS |
994 | if (!is_utf8_char(p)) |
995 | return FALSE; | |
a0ed51b3 | 996 | if (!PL_utf8_mark) |
e24b16f9 | 997 | PL_utf8_mark = swash_init("utf8", "IsM", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
998 | return swash_fetch(PL_utf8_mark, p); |
999 | } | |
1000 | ||
2104c8d9 | 1001 | UV |
864dbfa3 | 1002 | Perl_to_utf8_upper(pTHX_ U8 *p) |
a0ed51b3 LW |
1003 | { |
1004 | UV uv; | |
1005 | ||
1006 | if (!PL_utf8_toupper) | |
e24b16f9 | 1007 | PL_utf8_toupper = swash_init("utf8", "ToUpper", &PL_sv_undef, 4, 0); |
a0ed51b3 | 1008 | uv = swash_fetch(PL_utf8_toupper, p); |
756820e3 | 1009 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
a0ed51b3 LW |
1010 | } |
1011 | ||
2104c8d9 | 1012 | UV |
864dbfa3 | 1013 | Perl_to_utf8_title(pTHX_ U8 *p) |
a0ed51b3 LW |
1014 | { |
1015 | UV uv; | |
1016 | ||
1017 | if (!PL_utf8_totitle) | |
e24b16f9 | 1018 | PL_utf8_totitle = swash_init("utf8", "ToTitle", &PL_sv_undef, 4, 0); |
a0ed51b3 | 1019 | uv = swash_fetch(PL_utf8_totitle, p); |
756820e3 | 1020 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
a0ed51b3 LW |
1021 | } |
1022 | ||
2104c8d9 | 1023 | UV |
864dbfa3 | 1024 | Perl_to_utf8_lower(pTHX_ U8 *p) |
a0ed51b3 LW |
1025 | { |
1026 | UV uv; | |
1027 | ||
1028 | if (!PL_utf8_tolower) | |
e24b16f9 | 1029 | PL_utf8_tolower = swash_init("utf8", "ToLower", &PL_sv_undef, 4, 0); |
a0ed51b3 | 1030 | uv = swash_fetch(PL_utf8_tolower, p); |
756820e3 | 1031 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
a0ed51b3 LW |
1032 | } |
1033 | ||
1034 | /* a "swash" is a swatch hash */ | |
1035 | ||
1036 | SV* | |
864dbfa3 | 1037 | Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none) |
a0ed51b3 LW |
1038 | { |
1039 | SV* retval; | |
1040 | char tmpbuf[256]; | |
8e84507e | 1041 | dSP; |
ce3b816e GS |
1042 | |
1043 | if (!gv_stashpv(pkg, 0)) { /* demand load utf8 */ | |
1044 | ENTER; | |
1045 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpv(pkg,0), Nullsv); | |
1046 | LEAVE; | |
1047 | } | |
1048 | SPAGAIN; | |
a0ed51b3 LW |
1049 | PUSHSTACKi(PERLSI_MAGIC); |
1050 | PUSHMARK(SP); | |
1051 | EXTEND(SP,5); | |
1052 | PUSHs(sv_2mortal(newSVpvn(pkg, strlen(pkg)))); | |
1053 | PUSHs(sv_2mortal(newSVpvn(name, strlen(name)))); | |
1054 | PUSHs(listsv); | |
1055 | PUSHs(sv_2mortal(newSViv(minbits))); | |
1056 | PUSHs(sv_2mortal(newSViv(none))); | |
1057 | PUTBACK; | |
1058 | ENTER; | |
1059 | SAVEI32(PL_hints); | |
1060 | PL_hints = 0; | |
1061 | save_re_context(); | |
e24b16f9 | 1062 | if (PL_curcop == &PL_compiling) /* XXX ought to be handled by lex_start */ |
a0ed51b3 | 1063 | strncpy(tmpbuf, PL_tokenbuf, sizeof tmpbuf); |
864dbfa3 | 1064 | if (call_method("SWASHNEW", G_SCALAR)) |
8e84507e | 1065 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 | 1066 | else |
e24b16f9 | 1067 | retval = &PL_sv_undef; |
a0ed51b3 LW |
1068 | LEAVE; |
1069 | POPSTACK; | |
e24b16f9 | 1070 | if (PL_curcop == &PL_compiling) { |
a0ed51b3 | 1071 | strncpy(PL_tokenbuf, tmpbuf, sizeof tmpbuf); |
e24b16f9 | 1072 | PL_curcop->op_private = PL_hints; |
a0ed51b3 LW |
1073 | } |
1074 | if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV) | |
cea2e8a9 | 1075 | Perl_croak(aTHX_ "SWASHNEW didn't return an HV ref"); |
a0ed51b3 LW |
1076 | return retval; |
1077 | } | |
1078 | ||
1079 | UV | |
864dbfa3 | 1080 | Perl_swash_fetch(pTHX_ SV *sv, U8 *ptr) |
a0ed51b3 LW |
1081 | { |
1082 | HV* hv = (HV*)SvRV(sv); | |
1083 | U32 klen = UTF8SKIP(ptr) - 1; | |
1084 | U32 off = ptr[klen] & 127; /* NB: 64 bit always 0 when len > 1 */ | |
1085 | STRLEN slen; | |
1086 | STRLEN needents = (klen ? 64 : 128); | |
dfe13c55 | 1087 | U8 *tmps; |
a0ed51b3 LW |
1088 | U32 bit; |
1089 | SV *retval; | |
1090 | ||
1091 | /* | |
1092 | * This single-entry cache saves about 1/3 of the utf8 overhead in test | |
1093 | * suite. (That is, only 7-8% overall over just a hash cache. Still, | |
1094 | * it's nothing to sniff at.) Pity we usually come through at least | |
1095 | * two function calls to get here... | |
1096 | * | |
1097 | * NB: this code assumes that swatches are never modified, once generated! | |
1098 | */ | |
1099 | ||
1100 | if (hv == PL_last_swash_hv && | |
1101 | klen == PL_last_swash_klen && | |
12ae5dfc | 1102 | (!klen || memEQ((char *)ptr,(char *)PL_last_swash_key,klen)) ) |
a0ed51b3 LW |
1103 | { |
1104 | tmps = PL_last_swash_tmps; | |
1105 | slen = PL_last_swash_slen; | |
1106 | } | |
1107 | else { | |
1108 | /* Try our second-level swatch cache, kept in a hash. */ | |
dfe13c55 | 1109 | SV** svp = hv_fetch(hv, (char*)ptr, klen, FALSE); |
a0ed51b3 LW |
1110 | |
1111 | /* If not cached, generate it via utf8::SWASHGET */ | |
dfe13c55 | 1112 | if (!svp || !SvPOK(*svp) || !(tmps = (U8*)SvPV(*svp, slen))) { |
a0ed51b3 LW |
1113 | dSP; |
1114 | ENTER; | |
1115 | SAVETMPS; | |
1116 | save_re_context(); | |
1117 | PUSHSTACKi(PERLSI_MAGIC); | |
1118 | PUSHMARK(SP); | |
1119 | EXTEND(SP,3); | |
1120 | PUSHs((SV*)sv); | |
756820e3 | 1121 | PUSHs(sv_2mortal(newSViv(utf8_to_uv(ptr, UTF8_MAXLEN, 0, 0) & ~(needents - 1)))); |
a0ed51b3 LW |
1122 | PUSHs(sv_2mortal(newSViv(needents))); |
1123 | PUTBACK; | |
864dbfa3 | 1124 | if (call_method("SWASHGET", G_SCALAR)) |
8e84507e | 1125 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 | 1126 | else |
e24b16f9 | 1127 | retval = &PL_sv_undef; |
a0ed51b3 LW |
1128 | POPSTACK; |
1129 | FREETMPS; | |
1130 | LEAVE; | |
e24b16f9 GS |
1131 | if (PL_curcop == &PL_compiling) |
1132 | PL_curcop->op_private = PL_hints; | |
a0ed51b3 | 1133 | |
dfe13c55 | 1134 | svp = hv_store(hv, (char*)ptr, klen, retval, 0); |
a0ed51b3 | 1135 | |
dfe13c55 | 1136 | if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || slen < 8) |
cea2e8a9 | 1137 | Perl_croak(aTHX_ "SWASHGET didn't return result of proper length"); |
a0ed51b3 LW |
1138 | } |
1139 | ||
1140 | PL_last_swash_hv = hv; | |
1141 | PL_last_swash_klen = klen; | |
1142 | PL_last_swash_tmps = tmps; | |
1143 | PL_last_swash_slen = slen; | |
1144 | if (klen) | |
1145 | Copy(ptr, PL_last_swash_key, klen, U8); | |
1146 | } | |
1147 | ||
9faf8d75 | 1148 | switch ((int)((slen << 3) / needents)) { |
a0ed51b3 LW |
1149 | case 1: |
1150 | bit = 1 << (off & 7); | |
1151 | off >>= 3; | |
1152 | return (tmps[off] & bit) != 0; | |
1153 | case 8: | |
1154 | return tmps[off]; | |
1155 | case 16: | |
1156 | off <<= 1; | |
1157 | return (tmps[off] << 8) + tmps[off + 1] ; | |
1158 | case 32: | |
1159 | off <<= 2; | |
1160 | return (tmps[off] << 24) + (tmps[off+1] << 16) + (tmps[off+2] << 8) + tmps[off + 3] ; | |
1161 | } | |
cea2e8a9 | 1162 | Perl_croak(aTHX_ "panic: swash_fetch"); |
a0ed51b3 LW |
1163 | return 0; |
1164 | } |