Commit | Line | Data |
a0ed51b3 |
1 | /* utf8.c |
2 | * |
3818b22b |
3 | * Copyright (c) 1998-2000, Larry Wall |
a0ed51b3 |
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 |
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 |
31 | { |
32 | if (uv < 0x80) { |
33 | *d++ = uv; |
ad391ad9 |
34 | *d = 0; |
a0ed51b3 |
35 | return d; |
36 | } |
37 | if (uv < 0x800) { |
38 | *d++ = (( uv >> 6) | 0xc0); |
39 | *d++ = (( uv & 0x3f) | 0x80); |
ad391ad9 |
40 | *d = 0; |
a0ed51b3 |
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 |
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 |
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 |
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 |
75 | return d; |
76 | } |
6b8eaf93 |
77 | #ifdef HAS_QUAD |
d7578b48 |
78 | if (uv < UTF8_QUAD_MAX) |
a0ed51b3 |
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 |
89 | return d; |
90 | } |
6b8eaf93 |
91 | #ifdef HAS_QUAD |
a0ed51b3 |
92 | { |
93 | *d++ = 0xff; /* Can't match U+FFFE! */ |
3c77ea2b |
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 |
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 |
107 | return d; |
108 | } |
109 | #endif |
110 | } |
111 | |
386d01d6 |
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 |
116 | Perl_is_utf8_char(pTHX_ U8 *s) |
117 | { |
118 | U8 u = *s; |
067a85ef |
119 | STRLEN slen, len; |
120 | UV uv, ouv; |
386d01d6 |
121 | |
067a85ef |
122 | if (u <= 0x7f) |
386d01d6 |
123 | return 1; |
124 | |
067a85ef |
125 | if (u >= 0x80 && u <= 0xbf) |
386d01d6 |
126 | return 0; |
127 | |
9f07fdcd |
128 | len = UTF8SKIP(s); |
386d01d6 |
129 | |
067a85ef |
130 | if (len < 2 || (u >= 0xc0 && u <= 0xfd && s[1] < 0x80)) |
131 | return 0; |
132 | |
386d01d6 |
133 | slen = len - 1; |
134 | s++; |
067a85ef |
135 | uv = u; |
136 | ouv = uv; |
386d01d6 |
137 | while (slen--) { |
138 | if ((*s & 0xc0) != 0x80) |
139 | return 0; |
067a85ef |
140 | uv = (uv << 6) | (*s & 0x3f); |
141 | if (uv < ouv) |
142 | return 0; |
143 | ouv = uv; |
386d01d6 |
144 | s++; |
145 | } |
067a85ef |
146 | |
5bbb0b5a |
147 | if (UNISKIP(uv) < len) |
067a85ef |
148 | return 0; |
149 | |
386d01d6 |
150 | return len; |
151 | } |
152 | |
6662521e |
153 | /* |
b2a2e44b |
154 | =for apidoc Am|is_utf8_string|U8 *s|STRLEN len |
6662521e |
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 |
163 | Perl_is_utf8_string(pTHX_ U8 *s, STRLEN len) |
164 | { |
067a85ef |
165 | U8* x = s; |
166 | U8* send = s + len; |
167 | STRLEN c; |
168 | |
6662521e |
169 | while (x < send) { |
170 | c = is_utf8_char(x); |
067a85ef |
171 | if (!c) |
172 | return FALSE; |
6662521e |
173 | x += c; |
067a85ef |
174 | if (x > send) |
175 | return FALSE; |
6662521e |
176 | } |
067a85ef |
177 | |
178 | return TRUE; |
6662521e |
179 | } |
180 | |
67e989fb |
181 | /* |
be2c7115 |
182 | =for apidoc Am|U8* s|utf8_to_uv|STRLEN curlen|STRLEN *retlen|U32 flags |
67e989fb |
183 | |
184 | Returns the character value of the first character in the string C<s> |
ba210ebe |
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 |
188 | |
189 | If C<s> does not point to a well-formed UTF8 character, the behaviour |
dcad2880 |
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 |
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 |
201 | UV uv = *s, ouv; |
202 | STRLEN len = 1; |
7bf1b6bb |
203 | #ifdef EBCDIC |
204 | bool dowarn = 0; |
205 | #else |
ba210ebe |
206 | bool dowarn = ckWARN_d(WARN_UTF8); |
7bf1b6bb |
207 | #endif |
ba210ebe |
208 | STRLEN expectlen = 0; |
209 | |
0c443dc2 |
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 |
218 | if (retlen) |
219 | *retlen = 1; |
220 | return *s; |
221 | } |
67e989fb |
222 | |
fcc8fcf6 |
223 | if ((uv >= 0x80 && uv <= 0xbf) && |
224 | !(flags & UTF8_ALLOW_CONTINUATION)) { |
ba210ebe |
225 | if (dowarn) |
226 | Perl_warner(aTHX_ WARN_UTF8, |
efbcad09 |
227 | "Malformed UTF-8 character (unexpected continuation byte 0x%02"UVxf")", |
ba210ebe |
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 |
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 |
238 | goto malformed; |
239 | } |
fcc8fcf6 |
240 | |
241 | if ((uv == 0xfe || uv == 0xff) && |
242 | !(flags & UTF8_ALLOW_FE_FF)) { |
ba210ebe |
243 | if (dowarn) |
244 | Perl_warner(aTHX_ WARN_UTF8, |
efbcad09 |
245 | "Malformed UTF-8 character (byte 0x%02"UVxf")", |
ba210ebe |
246 | uv); |
247 | goto malformed; |
a0ed51b3 |
248 | } |
fcc8fcf6 |
249 | |
ba210ebe |
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 |
258 | if (retlen) |
259 | *retlen = len; |
ba210ebe |
260 | |
261 | expectlen = len; |
262 | |
fcc8fcf6 |
263 | if ((curlen < expectlen) && |
264 | !(flags & UTF8_ALLOW_SHORT)) { |
ba210ebe |
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 |
269 | goto malformed; |
270 | } |
271 | |
272 | len--; |
a0ed51b3 |
273 | s++; |
ba210ebe |
274 | ouv = uv; |
275 | |
a0ed51b3 |
276 | while (len--) { |
277 | if ((*s & 0xc0) != 0x80) { |
ba210ebe |
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 |
283 | } |
284 | else |
ba210ebe |
285 | uv = (uv << 6) | (*s & 0x3f); |
286 | if (uv < ouv) { |
fcc8fcf6 |
287 | /* This cannot be allowed. */ |
ba210ebe |
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 |
298 | if ((uv >= 0xd800 && uv <= 0xdfff) && |
299 | !(flags & UTF8_ALLOW_SURROGATE)) { |
ba210ebe |
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 |
305 | } else if ((uv == 0xfffe) && |
306 | !(flags & UTF8_ALLOW_BOM)) { |
ba210ebe |
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 |
312 | } else if ((expectlen > UNISKIP(uv)) && |
313 | !(flags & UTF8_ALLOW_LONG)) { |
ba210ebe |
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 |
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 |
329 | |
330 | malformed: |
331 | |
fcc8fcf6 |
332 | if (flags & UTF8_CHECK_ONLY) { |
ba210ebe |
333 | if (retlen) |
cc366d4b |
334 | *retlen = -1; |
ba210ebe |
335 | return 0; |
336 | } |
337 | |
338 | if (retlen) |
cc366d4b |
339 | *retlen = expectlen ? expectlen : len; |
ba210ebe |
340 | |
341 | return UNICODE_REPLACEMENT_CHARACTER; |
a0ed51b3 |
342 | } |
343 | |
8e84507e |
344 | /* |
dcad2880 |
345 | =for apidoc Am|U8* s|utf8_to_uv_simple|STRLEN *retlen |
8e84507e |
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 |
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 |
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 |
362 | } |
363 | |
b76347f2 |
364 | /* |
b06226ff |
365 | =for apidoc Am|STRLEN|utf8_length|U8* s|U8 *e |
b76347f2 |
366 | |
367 | Return the length of the UTF-8 char encoded string C<s> in characters. |
02eb7b47 |
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 |
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 |
383 | |
384 | if (e - s < t) |
02eb7b47 |
385 | Perl_croak(aTHX_ "panic: utf8_length: unaligned end"); |
b76347f2 |
386 | s += t; |
387 | len++; |
388 | } |
389 | |
390 | return len; |
391 | } |
392 | |
b06226ff |
393 | /* |
394 | =for apidoc Am|IV|utf8_distance|U8 *a|U8 *b |
395 | |
396 | Returns the number of UTF8 characters between the UTF-8 pointers C<a> |
397 | and C<b>. |
398 | |
399 | WARNING: use only if you *know* that the pointers point inside the |
400 | same UTF-8 buffer. |
401 | |
402 | =cut */ |
a0ed51b3 |
403 | |
02eb7b47 |
404 | IV |
864dbfa3 |
405 | Perl_utf8_distance(pTHX_ U8 *a, U8 *b) |
a0ed51b3 |
406 | { |
02eb7b47 |
407 | IV off = 0; |
408 | |
a0ed51b3 |
409 | if (a < b) { |
410 | while (a < b) { |
02eb7b47 |
411 | U8 c = UTF8SKIP(a); |
412 | |
413 | if (b - a < c) |
414 | Perl_croak(aTHX_ "panic: utf8_distance: unaligned end"); |
415 | a += c; |
a0ed51b3 |
416 | off--; |
417 | } |
418 | } |
419 | else { |
420 | while (b < a) { |
02eb7b47 |
421 | U8 c = UTF8SKIP(b); |
422 | |
423 | if (a - b < c) |
424 | Perl_croak(aTHX_ "panic: utf8_distance: unaligned end"); |
425 | b += c; |
a0ed51b3 |
426 | off++; |
427 | } |
428 | } |
02eb7b47 |
429 | |
a0ed51b3 |
430 | return off; |
431 | } |
432 | |
b06226ff |
433 | /* |
434 | =for apidoc Am|U8*|utf8_hop|U8 *s|I32 off |
435 | |
436 | Move the C<s> pointing to UTF-8 data by C<off> characters, either forward |
437 | or backward. |
438 | |
439 | WARNING: do not use the following unless you *know* C<off> is within |
440 | the UTF-8 buffer pointed to by C<s>. |
441 | |
442 | =cut */ |
a0ed51b3 |
443 | |
444 | U8 * |
864dbfa3 |
445 | Perl_utf8_hop(pTHX_ U8 *s, I32 off) |
a0ed51b3 |
446 | { |
447 | if (off >= 0) { |
448 | while (off--) |
449 | s += UTF8SKIP(s); |
450 | } |
451 | else { |
452 | while (off++) { |
453 | s--; |
454 | if (*s & 0x80) { |
455 | while ((*s & 0xc0) == 0x80) |
456 | s--; |
457 | } |
458 | } |
459 | } |
460 | return s; |
461 | } |
462 | |
6940069f |
463 | /* |
246fae53 |
464 | =for apidoc Am|U8 *|utf8_to_bytes|U8 *s|STRLEN *len |
6940069f |
465 | |
246fae53 |
466 | Converts a string C<s> of length C<len> from UTF8 into byte encoding. |
467 | Unlike C<bytes_to_utf8>, this over-writes the original string, and |
468 | updates len to contain the new length. |
67e989fb |
469 | Returns zero on failure, setting C<len> to -1. |
6940069f |
470 | |
471 | =cut |
472 | */ |
473 | |
474 | U8 * |
246fae53 |
475 | Perl_utf8_to_bytes(pTHX_ U8* s, STRLEN *len) |
6940069f |
476 | { |
6940069f |
477 | U8 *send; |
478 | U8 *d; |
dcad2880 |
479 | U8 *save = s; |
246fae53 |
480 | |
481 | /* ensure valid UTF8 and chars < 256 before updating string */ |
dcad2880 |
482 | for (send = s + *len; s < send; ) { |
483 | U8 c = *s++; |
484 | |
9f9ab905 |
485 | if (c >= 0x80 && |
dcad2880 |
486 | ((s >= send) || |
487 | ((*s++ & 0xc0) != 0x80) || ((c & 0xfe) != 0xc2))) { |
488 | *len = -1; |
489 | return 0; |
490 | } |
246fae53 |
491 | } |
dcad2880 |
492 | |
493 | d = s = save; |
6940069f |
494 | while (s < send) { |
dcad2880 |
495 | if (*s < 0x80) { |
496 | *d++ = *s++; |
497 | } |
6940069f |
498 | else { |
ba210ebe |
499 | STRLEN ulen; |
dcad2880 |
500 | *d++ = (U8)utf8_to_uv_simple(s, &ulen); |
6940069f |
501 | s += ulen; |
6940069f |
502 | } |
503 | } |
504 | *d = '\0'; |
246fae53 |
505 | *len = d - save; |
6940069f |
506 | return save; |
507 | } |
508 | |
509 | /* |
6662521e |
510 | =for apidoc Am|U8 *|bytes_to_utf8|U8 *s|STRLEN *len |
6940069f |
511 | |
512 | Converts a string C<s> of length C<len> from ASCII into UTF8 encoding. |
6662521e |
513 | Returns a pointer to the newly-created string, and sets C<len> to |
514 | reflect the new length. |
6940069f |
515 | |
497711e7 |
516 | =cut |
6940069f |
517 | */ |
518 | |
519 | U8* |
6662521e |
520 | Perl_bytes_to_utf8(pTHX_ U8* s, STRLEN *len) |
6940069f |
521 | { |
6940069f |
522 | U8 *send; |
523 | U8 *d; |
524 | U8 *dst; |
6662521e |
525 | send = s + (*len); |
6940069f |
526 | |
6662521e |
527 | Newz(801, d, (*len) * 2 + 1, U8); |
6940069f |
528 | dst = d; |
529 | |
530 | while (s < send) { |
531 | if (*s < 0x80) |
532 | *d++ = *s++; |
533 | else { |
534 | UV uv = *s++; |
535 | *d++ = (( uv >> 6) | 0xc0); |
536 | *d++ = (( uv & 0x3f) | 0x80); |
537 | } |
538 | } |
539 | *d = '\0'; |
6662521e |
540 | *len = d-dst; |
6940069f |
541 | return dst; |
542 | } |
543 | |
a0ed51b3 |
544 | /* |
dea0fc0b |
545 | * Convert native (big-endian) or reversed (little-endian) UTF-16 to UTF-8. |
a0ed51b3 |
546 | * |
547 | * Destination must be pre-extended to 3/2 source. Do not use in-place. |
548 | * We optimize for native, for obvious reasons. */ |
549 | |
550 | U8* |
dea0fc0b |
551 | Perl_utf16_to_utf8(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 |
552 | { |
dea0fc0b |
553 | U8* pend; |
554 | U8* dstart = d; |
555 | |
556 | if (bytelen & 1) |
a7867d0a |
557 | Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen"); |
dea0fc0b |
558 | |
559 | pend = p + bytelen; |
560 | |
a0ed51b3 |
561 | while (p < pend) { |
dea0fc0b |
562 | UV uv = (p[0] << 8) + p[1]; /* UTF-16BE */ |
563 | p += 2; |
a0ed51b3 |
564 | if (uv < 0x80) { |
565 | *d++ = uv; |
566 | continue; |
567 | } |
568 | if (uv < 0x800) { |
569 | *d++ = (( uv >> 6) | 0xc0); |
570 | *d++ = (( uv & 0x3f) | 0x80); |
571 | continue; |
572 | } |
573 | if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */ |
dea0fc0b |
574 | UV low = *p++; |
575 | if (low < 0xdc00 || low >= 0xdfff) |
576 | Perl_croak(aTHX_ "Malformed UTF-16 surrogate"); |
a0ed51b3 |
577 | uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000; |
578 | } |
579 | if (uv < 0x10000) { |
580 | *d++ = (( uv >> 12) | 0xe0); |
581 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
582 | *d++ = (( uv & 0x3f) | 0x80); |
583 | continue; |
584 | } |
585 | else { |
586 | *d++ = (( uv >> 18) | 0xf0); |
587 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
588 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
589 | *d++ = (( uv & 0x3f) | 0x80); |
590 | continue; |
591 | } |
592 | } |
dea0fc0b |
593 | *newlen = d - dstart; |
a0ed51b3 |
594 | return d; |
595 | } |
596 | |
597 | /* Note: this one is slightly destructive of the source. */ |
598 | |
599 | U8* |
dea0fc0b |
600 | Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 |
601 | { |
602 | U8* s = (U8*)p; |
603 | U8* send = s + bytelen; |
604 | while (s < send) { |
605 | U8 tmp = s[0]; |
606 | s[0] = s[1]; |
607 | s[1] = tmp; |
608 | s += 2; |
609 | } |
dea0fc0b |
610 | return utf16_to_utf8(p, d, bytelen, newlen); |
a0ed51b3 |
611 | } |
612 | |
613 | /* for now these are all defined (inefficiently) in terms of the utf8 versions */ |
614 | |
615 | bool |
864dbfa3 |
616 | Perl_is_uni_alnum(pTHX_ U32 c) |
a0ed51b3 |
617 | { |
ad391ad9 |
618 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
619 | uv_to_utf8(tmpbuf, (UV)c); |
620 | return is_utf8_alnum(tmpbuf); |
621 | } |
622 | |
623 | bool |
b8c5462f |
624 | Perl_is_uni_alnumc(pTHX_ U32 c) |
625 | { |
ad391ad9 |
626 | U8 tmpbuf[UTF8_MAXLEN+1]; |
b8c5462f |
627 | uv_to_utf8(tmpbuf, (UV)c); |
628 | return is_utf8_alnumc(tmpbuf); |
629 | } |
630 | |
631 | bool |
864dbfa3 |
632 | Perl_is_uni_idfirst(pTHX_ U32 c) |
a0ed51b3 |
633 | { |
ad391ad9 |
634 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
635 | uv_to_utf8(tmpbuf, (UV)c); |
636 | return is_utf8_idfirst(tmpbuf); |
637 | } |
638 | |
639 | bool |
864dbfa3 |
640 | Perl_is_uni_alpha(pTHX_ U32 c) |
a0ed51b3 |
641 | { |
ad391ad9 |
642 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
643 | uv_to_utf8(tmpbuf, (UV)c); |
644 | return is_utf8_alpha(tmpbuf); |
645 | } |
646 | |
647 | bool |
4d61ec05 |
648 | Perl_is_uni_ascii(pTHX_ U32 c) |
649 | { |
ad391ad9 |
650 | U8 tmpbuf[UTF8_MAXLEN+1]; |
4d61ec05 |
651 | uv_to_utf8(tmpbuf, (UV)c); |
652 | return is_utf8_ascii(tmpbuf); |
653 | } |
654 | |
655 | bool |
864dbfa3 |
656 | Perl_is_uni_space(pTHX_ U32 c) |
a0ed51b3 |
657 | { |
ad391ad9 |
658 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
659 | uv_to_utf8(tmpbuf, (UV)c); |
660 | return is_utf8_space(tmpbuf); |
661 | } |
662 | |
663 | bool |
864dbfa3 |
664 | Perl_is_uni_digit(pTHX_ U32 c) |
a0ed51b3 |
665 | { |
ad391ad9 |
666 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
667 | uv_to_utf8(tmpbuf, (UV)c); |
668 | return is_utf8_digit(tmpbuf); |
669 | } |
670 | |
671 | bool |
864dbfa3 |
672 | Perl_is_uni_upper(pTHX_ U32 c) |
a0ed51b3 |
673 | { |
ad391ad9 |
674 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
675 | uv_to_utf8(tmpbuf, (UV)c); |
676 | return is_utf8_upper(tmpbuf); |
677 | } |
678 | |
679 | bool |
864dbfa3 |
680 | Perl_is_uni_lower(pTHX_ U32 c) |
a0ed51b3 |
681 | { |
ad391ad9 |
682 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
683 | uv_to_utf8(tmpbuf, (UV)c); |
684 | return is_utf8_lower(tmpbuf); |
685 | } |
686 | |
687 | bool |
b8c5462f |
688 | Perl_is_uni_cntrl(pTHX_ U32 c) |
689 | { |
ad391ad9 |
690 | U8 tmpbuf[UTF8_MAXLEN+1]; |
b8c5462f |
691 | uv_to_utf8(tmpbuf, (UV)c); |
692 | return is_utf8_cntrl(tmpbuf); |
693 | } |
694 | |
695 | bool |
696 | Perl_is_uni_graph(pTHX_ U32 c) |
697 | { |
ad391ad9 |
698 | U8 tmpbuf[UTF8_MAXLEN+1]; |
b8c5462f |
699 | uv_to_utf8(tmpbuf, (UV)c); |
700 | return is_utf8_graph(tmpbuf); |
701 | } |
702 | |
703 | bool |
864dbfa3 |
704 | Perl_is_uni_print(pTHX_ U32 c) |
a0ed51b3 |
705 | { |
ad391ad9 |
706 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
707 | uv_to_utf8(tmpbuf, (UV)c); |
708 | return is_utf8_print(tmpbuf); |
709 | } |
710 | |
b8c5462f |
711 | bool |
f248d071 |
712 | Perl_is_uni_punct(pTHX_ U32 c) |
b8c5462f |
713 | { |
ad391ad9 |
714 | U8 tmpbuf[UTF8_MAXLEN+1]; |
b8c5462f |
715 | uv_to_utf8(tmpbuf, (UV)c); |
716 | return is_utf8_punct(tmpbuf); |
717 | } |
718 | |
4d61ec05 |
719 | bool |
720 | Perl_is_uni_xdigit(pTHX_ U32 c) |
721 | { |
ad391ad9 |
722 | U8 tmpbuf[UTF8_MAXLEN+1]; |
4d61ec05 |
723 | uv_to_utf8(tmpbuf, (UV)c); |
724 | return is_utf8_xdigit(tmpbuf); |
725 | } |
726 | |
a0ed51b3 |
727 | U32 |
864dbfa3 |
728 | Perl_to_uni_upper(pTHX_ U32 c) |
a0ed51b3 |
729 | { |
ad391ad9 |
730 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
731 | uv_to_utf8(tmpbuf, (UV)c); |
732 | return to_utf8_upper(tmpbuf); |
733 | } |
734 | |
735 | U32 |
864dbfa3 |
736 | Perl_to_uni_title(pTHX_ U32 c) |
a0ed51b3 |
737 | { |
ad391ad9 |
738 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
739 | uv_to_utf8(tmpbuf, (UV)c); |
740 | return to_utf8_title(tmpbuf); |
741 | } |
742 | |
743 | U32 |
864dbfa3 |
744 | Perl_to_uni_lower(pTHX_ U32 c) |
a0ed51b3 |
745 | { |
ad391ad9 |
746 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
747 | uv_to_utf8(tmpbuf, (UV)c); |
748 | return to_utf8_lower(tmpbuf); |
749 | } |
750 | |
751 | /* for now these all assume no locale info available for Unicode > 255 */ |
752 | |
753 | bool |
864dbfa3 |
754 | Perl_is_uni_alnum_lc(pTHX_ U32 c) |
a0ed51b3 |
755 | { |
756 | return is_uni_alnum(c); /* XXX no locale support yet */ |
757 | } |
758 | |
759 | bool |
b8c5462f |
760 | Perl_is_uni_alnumc_lc(pTHX_ U32 c) |
761 | { |
762 | return is_uni_alnumc(c); /* XXX no locale support yet */ |
763 | } |
764 | |
765 | bool |
864dbfa3 |
766 | Perl_is_uni_idfirst_lc(pTHX_ U32 c) |
a0ed51b3 |
767 | { |
768 | return is_uni_idfirst(c); /* XXX no locale support yet */ |
769 | } |
770 | |
771 | bool |
864dbfa3 |
772 | Perl_is_uni_alpha_lc(pTHX_ U32 c) |
a0ed51b3 |
773 | { |
774 | return is_uni_alpha(c); /* XXX no locale support yet */ |
775 | } |
776 | |
777 | bool |
4d61ec05 |
778 | Perl_is_uni_ascii_lc(pTHX_ U32 c) |
779 | { |
780 | return is_uni_ascii(c); /* XXX no locale support yet */ |
781 | } |
782 | |
783 | bool |
864dbfa3 |
784 | Perl_is_uni_space_lc(pTHX_ U32 c) |
a0ed51b3 |
785 | { |
786 | return is_uni_space(c); /* XXX no locale support yet */ |
787 | } |
788 | |
789 | bool |
864dbfa3 |
790 | Perl_is_uni_digit_lc(pTHX_ U32 c) |
a0ed51b3 |
791 | { |
792 | return is_uni_digit(c); /* XXX no locale support yet */ |
793 | } |
794 | |
795 | bool |
864dbfa3 |
796 | Perl_is_uni_upper_lc(pTHX_ U32 c) |
a0ed51b3 |
797 | { |
798 | return is_uni_upper(c); /* XXX no locale support yet */ |
799 | } |
800 | |
801 | bool |
864dbfa3 |
802 | Perl_is_uni_lower_lc(pTHX_ U32 c) |
a0ed51b3 |
803 | { |
804 | return is_uni_lower(c); /* XXX no locale support yet */ |
805 | } |
806 | |
807 | bool |
b8c5462f |
808 | Perl_is_uni_cntrl_lc(pTHX_ U32 c) |
809 | { |
810 | return is_uni_cntrl(c); /* XXX no locale support yet */ |
811 | } |
812 | |
813 | bool |
814 | Perl_is_uni_graph_lc(pTHX_ U32 c) |
815 | { |
816 | return is_uni_graph(c); /* XXX no locale support yet */ |
817 | } |
818 | |
819 | bool |
864dbfa3 |
820 | Perl_is_uni_print_lc(pTHX_ U32 c) |
a0ed51b3 |
821 | { |
822 | return is_uni_print(c); /* XXX no locale support yet */ |
823 | } |
824 | |
b8c5462f |
825 | bool |
826 | Perl_is_uni_punct_lc(pTHX_ U32 c) |
827 | { |
828 | return is_uni_punct(c); /* XXX no locale support yet */ |
829 | } |
830 | |
4d61ec05 |
831 | bool |
832 | Perl_is_uni_xdigit_lc(pTHX_ U32 c) |
833 | { |
834 | return is_uni_xdigit(c); /* XXX no locale support yet */ |
835 | } |
836 | |
a0ed51b3 |
837 | U32 |
864dbfa3 |
838 | Perl_to_uni_upper_lc(pTHX_ U32 c) |
a0ed51b3 |
839 | { |
840 | return to_uni_upper(c); /* XXX no locale support yet */ |
841 | } |
842 | |
843 | U32 |
864dbfa3 |
844 | Perl_to_uni_title_lc(pTHX_ U32 c) |
a0ed51b3 |
845 | { |
846 | return to_uni_title(c); /* XXX no locale support yet */ |
847 | } |
848 | |
849 | U32 |
864dbfa3 |
850 | Perl_to_uni_lower_lc(pTHX_ U32 c) |
a0ed51b3 |
851 | { |
852 | return to_uni_lower(c); /* XXX no locale support yet */ |
853 | } |
854 | |
a0ed51b3 |
855 | bool |
864dbfa3 |
856 | Perl_is_utf8_alnum(pTHX_ U8 *p) |
a0ed51b3 |
857 | { |
386d01d6 |
858 | if (!is_utf8_char(p)) |
859 | return FALSE; |
a0ed51b3 |
860 | if (!PL_utf8_alnum) |
289d4f09 |
861 | /* NOTE: "IsWord", not "IsAlnum", since Alnum is a true |
862 | * descendant of isalnum(3), in other words, it doesn't |
863 | * contain the '_'. --jhi */ |
864 | PL_utf8_alnum = swash_init("utf8", "IsWord", &PL_sv_undef, 0, 0); |
a0ed51b3 |
865 | return swash_fetch(PL_utf8_alnum, p); |
866 | /* return *p == '_' || 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 |
b8c5462f |
876 | Perl_is_utf8_alnumc(pTHX_ U8 *p) |
877 | { |
386d01d6 |
878 | if (!is_utf8_char(p)) |
879 | return FALSE; |
b8c5462f |
880 | if (!PL_utf8_alnum) |
881 | PL_utf8_alnum = swash_init("utf8", "IsAlnumC", &PL_sv_undef, 0, 0); |
882 | return swash_fetch(PL_utf8_alnum, p); |
883 | /* return is_utf8_alpha(p) || is_utf8_digit(p); */ |
884 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ |
885 | if (!PL_utf8_alnum) |
886 | PL_utf8_alnum = swash_init("utf8", "", |
887 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); |
888 | return swash_fetch(PL_utf8_alnum, p); |
889 | #endif |
890 | } |
891 | |
892 | bool |
864dbfa3 |
893 | Perl_is_utf8_idfirst(pTHX_ U8 *p) |
a0ed51b3 |
894 | { |
895 | return *p == '_' || is_utf8_alpha(p); |
896 | } |
897 | |
898 | bool |
864dbfa3 |
899 | Perl_is_utf8_alpha(pTHX_ U8 *p) |
a0ed51b3 |
900 | { |
386d01d6 |
901 | if (!is_utf8_char(p)) |
902 | return FALSE; |
a0ed51b3 |
903 | if (!PL_utf8_alpha) |
e24b16f9 |
904 | PL_utf8_alpha = swash_init("utf8", "IsAlpha", &PL_sv_undef, 0, 0); |
a0ed51b3 |
905 | return swash_fetch(PL_utf8_alpha, p); |
906 | } |
907 | |
908 | bool |
b8c5462f |
909 | Perl_is_utf8_ascii(pTHX_ U8 *p) |
910 | { |
386d01d6 |
911 | if (!is_utf8_char(p)) |
912 | return FALSE; |
b8c5462f |
913 | if (!PL_utf8_ascii) |
914 | PL_utf8_ascii = swash_init("utf8", "IsAscii", &PL_sv_undef, 0, 0); |
915 | return swash_fetch(PL_utf8_ascii, p); |
916 | } |
917 | |
918 | bool |
864dbfa3 |
919 | Perl_is_utf8_space(pTHX_ U8 *p) |
a0ed51b3 |
920 | { |
386d01d6 |
921 | if (!is_utf8_char(p)) |
922 | return FALSE; |
a0ed51b3 |
923 | if (!PL_utf8_space) |
3bec3564 |
924 | PL_utf8_space = swash_init("utf8", "IsSpacePerl", &PL_sv_undef, 0, 0); |
a0ed51b3 |
925 | return swash_fetch(PL_utf8_space, p); |
926 | } |
927 | |
928 | bool |
864dbfa3 |
929 | Perl_is_utf8_digit(pTHX_ U8 *p) |
a0ed51b3 |
930 | { |
386d01d6 |
931 | if (!is_utf8_char(p)) |
932 | return FALSE; |
a0ed51b3 |
933 | if (!PL_utf8_digit) |
e24b16f9 |
934 | PL_utf8_digit = swash_init("utf8", "IsDigit", &PL_sv_undef, 0, 0); |
a0ed51b3 |
935 | return swash_fetch(PL_utf8_digit, p); |
936 | } |
937 | |
938 | bool |
864dbfa3 |
939 | Perl_is_utf8_upper(pTHX_ U8 *p) |
a0ed51b3 |
940 | { |
386d01d6 |
941 | if (!is_utf8_char(p)) |
942 | return FALSE; |
a0ed51b3 |
943 | if (!PL_utf8_upper) |
e24b16f9 |
944 | PL_utf8_upper = swash_init("utf8", "IsUpper", &PL_sv_undef, 0, 0); |
a0ed51b3 |
945 | return swash_fetch(PL_utf8_upper, p); |
946 | } |
947 | |
948 | bool |
864dbfa3 |
949 | Perl_is_utf8_lower(pTHX_ U8 *p) |
a0ed51b3 |
950 | { |
386d01d6 |
951 | if (!is_utf8_char(p)) |
952 | return FALSE; |
a0ed51b3 |
953 | if (!PL_utf8_lower) |
e24b16f9 |
954 | PL_utf8_lower = swash_init("utf8", "IsLower", &PL_sv_undef, 0, 0); |
a0ed51b3 |
955 | return swash_fetch(PL_utf8_lower, p); |
956 | } |
957 | |
958 | bool |
b8c5462f |
959 | Perl_is_utf8_cntrl(pTHX_ U8 *p) |
960 | { |
386d01d6 |
961 | if (!is_utf8_char(p)) |
962 | return FALSE; |
b8c5462f |
963 | if (!PL_utf8_cntrl) |
964 | PL_utf8_cntrl = swash_init("utf8", "IsCntrl", &PL_sv_undef, 0, 0); |
965 | return swash_fetch(PL_utf8_cntrl, p); |
966 | } |
967 | |
968 | bool |
969 | Perl_is_utf8_graph(pTHX_ U8 *p) |
970 | { |
386d01d6 |
971 | if (!is_utf8_char(p)) |
972 | return FALSE; |
b8c5462f |
973 | if (!PL_utf8_graph) |
974 | PL_utf8_graph = swash_init("utf8", "IsGraph", &PL_sv_undef, 0, 0); |
975 | return swash_fetch(PL_utf8_graph, p); |
976 | } |
977 | |
978 | bool |
864dbfa3 |
979 | Perl_is_utf8_print(pTHX_ U8 *p) |
a0ed51b3 |
980 | { |
386d01d6 |
981 | if (!is_utf8_char(p)) |
982 | return FALSE; |
a0ed51b3 |
983 | if (!PL_utf8_print) |
e24b16f9 |
984 | PL_utf8_print = swash_init("utf8", "IsPrint", &PL_sv_undef, 0, 0); |
a0ed51b3 |
985 | return swash_fetch(PL_utf8_print, p); |
986 | } |
987 | |
988 | bool |
b8c5462f |
989 | Perl_is_utf8_punct(pTHX_ U8 *p) |
990 | { |
386d01d6 |
991 | if (!is_utf8_char(p)) |
992 | return FALSE; |
b8c5462f |
993 | if (!PL_utf8_punct) |
994 | PL_utf8_punct = swash_init("utf8", "IsPunct", &PL_sv_undef, 0, 0); |
995 | return swash_fetch(PL_utf8_punct, p); |
996 | } |
997 | |
998 | bool |
999 | Perl_is_utf8_xdigit(pTHX_ U8 *p) |
1000 | { |
386d01d6 |
1001 | if (!is_utf8_char(p)) |
1002 | return FALSE; |
b8c5462f |
1003 | if (!PL_utf8_xdigit) |
1004 | PL_utf8_xdigit = swash_init("utf8", "IsXDigit", &PL_sv_undef, 0, 0); |
1005 | return swash_fetch(PL_utf8_xdigit, p); |
1006 | } |
1007 | |
1008 | bool |
864dbfa3 |
1009 | Perl_is_utf8_mark(pTHX_ U8 *p) |
a0ed51b3 |
1010 | { |
386d01d6 |
1011 | if (!is_utf8_char(p)) |
1012 | return FALSE; |
a0ed51b3 |
1013 | if (!PL_utf8_mark) |
e24b16f9 |
1014 | PL_utf8_mark = swash_init("utf8", "IsM", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1015 | return swash_fetch(PL_utf8_mark, p); |
1016 | } |
1017 | |
2104c8d9 |
1018 | UV |
864dbfa3 |
1019 | Perl_to_utf8_upper(pTHX_ U8 *p) |
a0ed51b3 |
1020 | { |
1021 | UV uv; |
1022 | |
1023 | if (!PL_utf8_toupper) |
e24b16f9 |
1024 | PL_utf8_toupper = swash_init("utf8", "ToUpper", &PL_sv_undef, 4, 0); |
a0ed51b3 |
1025 | uv = swash_fetch(PL_utf8_toupper, p); |
756820e3 |
1026 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
a0ed51b3 |
1027 | } |
1028 | |
2104c8d9 |
1029 | UV |
864dbfa3 |
1030 | Perl_to_utf8_title(pTHX_ U8 *p) |
a0ed51b3 |
1031 | { |
1032 | UV uv; |
1033 | |
1034 | if (!PL_utf8_totitle) |
e24b16f9 |
1035 | PL_utf8_totitle = swash_init("utf8", "ToTitle", &PL_sv_undef, 4, 0); |
a0ed51b3 |
1036 | uv = swash_fetch(PL_utf8_totitle, p); |
756820e3 |
1037 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
a0ed51b3 |
1038 | } |
1039 | |
2104c8d9 |
1040 | UV |
864dbfa3 |
1041 | Perl_to_utf8_lower(pTHX_ U8 *p) |
a0ed51b3 |
1042 | { |
1043 | UV uv; |
1044 | |
1045 | if (!PL_utf8_tolower) |
e24b16f9 |
1046 | PL_utf8_tolower = swash_init("utf8", "ToLower", &PL_sv_undef, 4, 0); |
a0ed51b3 |
1047 | uv = swash_fetch(PL_utf8_tolower, p); |
756820e3 |
1048 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
a0ed51b3 |
1049 | } |
1050 | |
1051 | /* a "swash" is a swatch hash */ |
1052 | |
1053 | SV* |
864dbfa3 |
1054 | Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none) |
a0ed51b3 |
1055 | { |
1056 | SV* retval; |
1057 | char tmpbuf[256]; |
8e84507e |
1058 | dSP; |
ce3b816e |
1059 | |
1060 | if (!gv_stashpv(pkg, 0)) { /* demand load utf8 */ |
1061 | ENTER; |
1062 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpv(pkg,0), Nullsv); |
1063 | LEAVE; |
1064 | } |
1065 | SPAGAIN; |
a0ed51b3 |
1066 | PUSHSTACKi(PERLSI_MAGIC); |
1067 | PUSHMARK(SP); |
1068 | EXTEND(SP,5); |
1069 | PUSHs(sv_2mortal(newSVpvn(pkg, strlen(pkg)))); |
1070 | PUSHs(sv_2mortal(newSVpvn(name, strlen(name)))); |
1071 | PUSHs(listsv); |
1072 | PUSHs(sv_2mortal(newSViv(minbits))); |
1073 | PUSHs(sv_2mortal(newSViv(none))); |
1074 | PUTBACK; |
1075 | ENTER; |
1076 | SAVEI32(PL_hints); |
1077 | PL_hints = 0; |
1078 | save_re_context(); |
e24b16f9 |
1079 | if (PL_curcop == &PL_compiling) /* XXX ought to be handled by lex_start */ |
a0ed51b3 |
1080 | strncpy(tmpbuf, PL_tokenbuf, sizeof tmpbuf); |
864dbfa3 |
1081 | if (call_method("SWASHNEW", G_SCALAR)) |
8e84507e |
1082 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 |
1083 | else |
e24b16f9 |
1084 | retval = &PL_sv_undef; |
a0ed51b3 |
1085 | LEAVE; |
1086 | POPSTACK; |
e24b16f9 |
1087 | if (PL_curcop == &PL_compiling) { |
a0ed51b3 |
1088 | strncpy(PL_tokenbuf, tmpbuf, sizeof tmpbuf); |
e24b16f9 |
1089 | PL_curcop->op_private = PL_hints; |
a0ed51b3 |
1090 | } |
1091 | if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV) |
cea2e8a9 |
1092 | Perl_croak(aTHX_ "SWASHNEW didn't return an HV ref"); |
a0ed51b3 |
1093 | return retval; |
1094 | } |
1095 | |
1096 | UV |
864dbfa3 |
1097 | Perl_swash_fetch(pTHX_ SV *sv, U8 *ptr) |
a0ed51b3 |
1098 | { |
1099 | HV* hv = (HV*)SvRV(sv); |
1100 | U32 klen = UTF8SKIP(ptr) - 1; |
1101 | U32 off = ptr[klen] & 127; /* NB: 64 bit always 0 when len > 1 */ |
1102 | STRLEN slen; |
1103 | STRLEN needents = (klen ? 64 : 128); |
dfe13c55 |
1104 | U8 *tmps; |
a0ed51b3 |
1105 | U32 bit; |
1106 | SV *retval; |
1107 | |
1108 | /* |
1109 | * This single-entry cache saves about 1/3 of the utf8 overhead in test |
1110 | * suite. (That is, only 7-8% overall over just a hash cache. Still, |
1111 | * it's nothing to sniff at.) Pity we usually come through at least |
1112 | * two function calls to get here... |
1113 | * |
1114 | * NB: this code assumes that swatches are never modified, once generated! |
1115 | */ |
1116 | |
1117 | if (hv == PL_last_swash_hv && |
1118 | klen == PL_last_swash_klen && |
12ae5dfc |
1119 | (!klen || memEQ((char *)ptr,(char *)PL_last_swash_key,klen)) ) |
a0ed51b3 |
1120 | { |
1121 | tmps = PL_last_swash_tmps; |
1122 | slen = PL_last_swash_slen; |
1123 | } |
1124 | else { |
1125 | /* Try our second-level swatch cache, kept in a hash. */ |
dfe13c55 |
1126 | SV** svp = hv_fetch(hv, (char*)ptr, klen, FALSE); |
a0ed51b3 |
1127 | |
1128 | /* If not cached, generate it via utf8::SWASHGET */ |
dfe13c55 |
1129 | if (!svp || !SvPOK(*svp) || !(tmps = (U8*)SvPV(*svp, slen))) { |
a0ed51b3 |
1130 | dSP; |
1131 | ENTER; |
1132 | SAVETMPS; |
1133 | save_re_context(); |
1134 | PUSHSTACKi(PERLSI_MAGIC); |
1135 | PUSHMARK(SP); |
1136 | EXTEND(SP,3); |
1137 | PUSHs((SV*)sv); |
756820e3 |
1138 | PUSHs(sv_2mortal(newSViv(utf8_to_uv(ptr, UTF8_MAXLEN, 0, 0) & ~(needents - 1)))); |
a0ed51b3 |
1139 | PUSHs(sv_2mortal(newSViv(needents))); |
1140 | PUTBACK; |
864dbfa3 |
1141 | if (call_method("SWASHGET", G_SCALAR)) |
8e84507e |
1142 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 |
1143 | else |
e24b16f9 |
1144 | retval = &PL_sv_undef; |
a0ed51b3 |
1145 | POPSTACK; |
1146 | FREETMPS; |
1147 | LEAVE; |
e24b16f9 |
1148 | if (PL_curcop == &PL_compiling) |
1149 | PL_curcop->op_private = PL_hints; |
a0ed51b3 |
1150 | |
dfe13c55 |
1151 | svp = hv_store(hv, (char*)ptr, klen, retval, 0); |
a0ed51b3 |
1152 | |
dfe13c55 |
1153 | if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || slen < 8) |
cea2e8a9 |
1154 | Perl_croak(aTHX_ "SWASHGET didn't return result of proper length"); |
a0ed51b3 |
1155 | } |
1156 | |
1157 | PL_last_swash_hv = hv; |
1158 | PL_last_swash_klen = klen; |
1159 | PL_last_swash_tmps = tmps; |
1160 | PL_last_swash_slen = slen; |
1161 | if (klen) |
1162 | Copy(ptr, PL_last_swash_key, klen, U8); |
1163 | } |
1164 | |
9faf8d75 |
1165 | switch ((int)((slen << 3) / needents)) { |
a0ed51b3 |
1166 | case 1: |
1167 | bit = 1 << (off & 7); |
1168 | off >>= 3; |
1169 | return (tmps[off] & bit) != 0; |
1170 | case 8: |
1171 | return tmps[off]; |
1172 | case 16: |
1173 | off <<= 1; |
1174 | return (tmps[off] << 8) + tmps[off + 1] ; |
1175 | case 32: |
1176 | off <<= 2; |
1177 | return (tmps[off] << 24) + (tmps[off+1] << 16) + (tmps[off+2] << 8) + tmps[off + 3] ; |
1178 | } |
cea2e8a9 |
1179 | Perl_croak(aTHX_ "panic: swash_fetch"); |
a0ed51b3 |
1180 | return 0; |
1181 | } |