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 * |
864dbfa3 |
30 | Perl_uv_to_utf8(pTHX_ U8 *d, UV uv) |
a0ed51b3 |
31 | { |
32 | if (uv < 0x80) { |
33 | *d++ = uv; |
34 | return d; |
35 | } |
36 | if (uv < 0x800) { |
37 | *d++ = (( uv >> 6) | 0xc0); |
38 | *d++ = (( uv & 0x3f) | 0x80); |
39 | return d; |
40 | } |
41 | if (uv < 0x10000) { |
42 | *d++ = (( uv >> 12) | 0xe0); |
43 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
44 | *d++ = (( uv & 0x3f) | 0x80); |
45 | return d; |
46 | } |
47 | if (uv < 0x200000) { |
48 | *d++ = (( uv >> 18) | 0xf0); |
49 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
50 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
51 | *d++ = (( uv & 0x3f) | 0x80); |
52 | return d; |
53 | } |
54 | if (uv < 0x4000000) { |
55 | *d++ = (( uv >> 24) | 0xf8); |
56 | *d++ = (((uv >> 18) & 0x3f) | 0x80); |
57 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
58 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
59 | *d++ = (( uv & 0x3f) | 0x80); |
60 | return d; |
61 | } |
62 | if (uv < 0x80000000) { |
63 | *d++ = (( uv >> 30) | 0xfc); |
64 | *d++ = (((uv >> 24) & 0x3f) | 0x80); |
65 | *d++ = (((uv >> 18) & 0x3f) | 0x80); |
66 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
67 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
68 | *d++ = (( uv & 0x3f) | 0x80); |
69 | return d; |
70 | } |
6b8eaf93 |
71 | #ifdef HAS_QUAD |
d7578b48 |
72 | if (uv < UTF8_QUAD_MAX) |
a0ed51b3 |
73 | #endif |
74 | { |
75 | *d++ = 0xfe; /* Can't match U+FEFF! */ |
76 | *d++ = (((uv >> 30) & 0x3f) | 0x80); |
77 | *d++ = (((uv >> 24) & 0x3f) | 0x80); |
78 | *d++ = (((uv >> 18) & 0x3f) | 0x80); |
79 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
80 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
81 | *d++ = (( uv & 0x3f) | 0x80); |
82 | return d; |
83 | } |
6b8eaf93 |
84 | #ifdef HAS_QUAD |
a0ed51b3 |
85 | { |
86 | *d++ = 0xff; /* Can't match U+FFFE! */ |
3c77ea2b |
87 | *d++ = 0x80; /* 6 Reserved bits */ |
88 | *d++ = (((uv >> 60) & 0x0f) | 0x80); /* 2 Reserved bits */ |
89 | *d++ = (((uv >> 54) & 0x3f) | 0x80); |
90 | *d++ = (((uv >> 48) & 0x3f) | 0x80); |
91 | *d++ = (((uv >> 42) & 0x3f) | 0x80); |
a0ed51b3 |
92 | *d++ = (((uv >> 36) & 0x3f) | 0x80); |
93 | *d++ = (((uv >> 30) & 0x3f) | 0x80); |
94 | *d++ = (((uv >> 24) & 0x3f) | 0x80); |
95 | *d++ = (((uv >> 18) & 0x3f) | 0x80); |
96 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
97 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
98 | *d++ = (( uv & 0x3f) | 0x80); |
99 | return d; |
100 | } |
101 | #endif |
102 | } |
103 | |
386d01d6 |
104 | /* Tests if some arbitrary number of bytes begins in a valid UTF-8 character. |
105 | * The actual number of bytes in the UTF-8 character will be returned if it |
106 | * is valid, otherwise 0. */ |
067a85ef |
107 | STRLEN |
386d01d6 |
108 | Perl_is_utf8_char(pTHX_ U8 *s) |
109 | { |
110 | U8 u = *s; |
067a85ef |
111 | STRLEN slen, len; |
112 | UV uv, ouv; |
386d01d6 |
113 | |
067a85ef |
114 | if (u <= 0x7f) |
386d01d6 |
115 | return 1; |
116 | |
067a85ef |
117 | if (u >= 0x80 && u <= 0xbf) |
386d01d6 |
118 | return 0; |
119 | |
9f07fdcd |
120 | len = UTF8SKIP(s); |
386d01d6 |
121 | |
067a85ef |
122 | if (len < 2 || (u >= 0xc0 && u <= 0xfd && s[1] < 0x80)) |
123 | return 0; |
124 | |
386d01d6 |
125 | slen = len - 1; |
126 | s++; |
067a85ef |
127 | uv = u; |
128 | ouv = uv; |
386d01d6 |
129 | while (slen--) { |
130 | if ((*s & 0xc0) != 0x80) |
131 | return 0; |
067a85ef |
132 | uv = (uv << 6) | (*s & 0x3f); |
133 | if (uv < ouv) |
134 | return 0; |
135 | ouv = uv; |
386d01d6 |
136 | s++; |
137 | } |
067a85ef |
138 | |
5bbb0b5a |
139 | if (UNISKIP(uv) < len) |
067a85ef |
140 | return 0; |
141 | |
386d01d6 |
142 | return len; |
143 | } |
144 | |
6662521e |
145 | /* |
b2a2e44b |
146 | =for apidoc Am|is_utf8_string|U8 *s|STRLEN len |
6662521e |
147 | |
148 | Returns true if first C<len> bytes of the given string form valid a UTF8 |
149 | string, false otherwise. |
150 | |
151 | =cut |
152 | */ |
153 | |
8e84507e |
154 | bool |
6662521e |
155 | Perl_is_utf8_string(pTHX_ U8 *s, STRLEN len) |
156 | { |
067a85ef |
157 | U8* x = s; |
158 | U8* send = s + len; |
159 | STRLEN c; |
160 | |
6662521e |
161 | while (x < send) { |
162 | c = is_utf8_char(x); |
067a85ef |
163 | if (!c) |
164 | return FALSE; |
6662521e |
165 | x += c; |
067a85ef |
166 | if (x > send) |
167 | return FALSE; |
6662521e |
168 | } |
067a85ef |
169 | |
170 | return TRUE; |
6662521e |
171 | } |
172 | |
67e989fb |
173 | /* |
dcad2880 |
174 | =for apidoc Am|U8* s|utf8_to_uv|STRLEN curlen|I32 *retlen|U32 flags |
67e989fb |
175 | |
176 | Returns the character value of the first character in the string C<s> |
ba210ebe |
177 | which is assumed to be in UTF8 encoding and no longer than C<curlen>; |
178 | C<retlen> will be set to the length, in bytes, of that character, |
179 | and the pointer C<s> will be advanced to the end of the character. |
67e989fb |
180 | |
181 | If C<s> does not point to a well-formed UTF8 character, the behaviour |
dcad2880 |
182 | is dependent on the value of C<flags>: if it contains UTF8_CHECK_ONLY, |
183 | it is assumed that the caller will raise a warning, and this function |
184 | will set C<retlen> to C<-1> and return. The C<flags> can also contain |
185 | various flags to allow deviations from the strict UTF-8 encoding. |
67e989fb |
186 | |
dcad2880 |
187 | =cut */ |
67e989fb |
188 | |
a0ed51b3 |
189 | UV |
dcad2880 |
190 | Perl_utf8_to_uv(pTHX_ U8* s, STRLEN curlen, STRLEN* retlen, U32 flags) |
a0ed51b3 |
191 | { |
ba210ebe |
192 | dTHR; |
193 | UV uv = *s, ouv; |
194 | STRLEN len = 1; |
7bf1b6bb |
195 | #ifdef EBCDIC |
196 | bool dowarn = 0; |
197 | #else |
ba210ebe |
198 | bool dowarn = ckWARN_d(WARN_UTF8); |
7bf1b6bb |
199 | #endif |
ba210ebe |
200 | STRLEN expectlen = 0; |
201 | |
0c443dc2 |
202 | if (curlen == 0) { |
203 | if (dowarn) |
204 | Perl_warner(aTHX_ WARN_UTF8, |
205 | "Malformed UTF-8 character (an empty string)"); |
206 | goto malformed; |
207 | } |
208 | |
ba210ebe |
209 | if (uv <= 0x7f) { /* Pure ASCII. */ |
a0ed51b3 |
210 | if (retlen) |
211 | *retlen = 1; |
212 | return *s; |
213 | } |
67e989fb |
214 | |
fcc8fcf6 |
215 | if ((uv >= 0x80 && uv <= 0xbf) && |
216 | !(flags & UTF8_ALLOW_CONTINUATION)) { |
ba210ebe |
217 | if (dowarn) |
218 | Perl_warner(aTHX_ WARN_UTF8, |
efbcad09 |
219 | "Malformed UTF-8 character (unexpected continuation byte 0x%02"UVxf")", |
ba210ebe |
220 | uv); |
221 | goto malformed; |
222 | } |
223 | |
0c443dc2 |
224 | if ((uv >= 0xc0 && uv <= 0xfd && curlen > 1 && s[1] < 0x80) && |
fcc8fcf6 |
225 | !(flags & UTF8_ALLOW_NON_CONTINUATION)) { |
ba210ebe |
226 | if (dowarn) |
227 | Perl_warner(aTHX_ WARN_UTF8, |
efbcad09 |
228 | "Malformed UTF-8 character (unexpected non-continuation byte 0x%02"UVxf" after byte 0x%02"UVxf")", |
9e29e5ff |
229 | (UV)s[1], uv); |
ba210ebe |
230 | goto malformed; |
231 | } |
fcc8fcf6 |
232 | |
233 | if ((uv == 0xfe || uv == 0xff) && |
234 | !(flags & UTF8_ALLOW_FE_FF)) { |
ba210ebe |
235 | if (dowarn) |
236 | Perl_warner(aTHX_ WARN_UTF8, |
efbcad09 |
237 | "Malformed UTF-8 character (byte 0x%02"UVxf")", |
ba210ebe |
238 | uv); |
239 | goto malformed; |
a0ed51b3 |
240 | } |
fcc8fcf6 |
241 | |
ba210ebe |
242 | if (!(uv & 0x20)) { len = 2; uv &= 0x1f; } |
243 | else if (!(uv & 0x10)) { len = 3; uv &= 0x0f; } |
244 | else if (!(uv & 0x08)) { len = 4; uv &= 0x07; } |
245 | else if (!(uv & 0x04)) { len = 5; uv &= 0x03; } |
246 | else if (!(uv & 0x02)) { len = 6; uv &= 0x01; } |
247 | else if (!(uv & 0x01)) { len = 7; uv = 0; } |
3c77ea2b |
248 | else { len = 13; uv = 0; } /* whoa! */ |
fcc8fcf6 |
249 | |
a0ed51b3 |
250 | if (retlen) |
251 | *retlen = len; |
ba210ebe |
252 | |
253 | expectlen = len; |
254 | |
fcc8fcf6 |
255 | if ((curlen < expectlen) && |
256 | !(flags & UTF8_ALLOW_SHORT)) { |
ba210ebe |
257 | if (dowarn) |
258 | Perl_warner(aTHX_ WARN_UTF8, |
259 | "Malformed UTF-8 character (%d byte%s, need %d)", |
0c443dc2 |
260 | curlen, curlen == 1 ? "" : "s", expectlen); |
ba210ebe |
261 | goto malformed; |
262 | } |
263 | |
264 | len--; |
a0ed51b3 |
265 | s++; |
ba210ebe |
266 | ouv = uv; |
267 | |
a0ed51b3 |
268 | while (len--) { |
269 | if ((*s & 0xc0) != 0x80) { |
ba210ebe |
270 | if (dowarn) |
271 | Perl_warner(aTHX_ WARN_UTF8, |
272 | "Malformed UTF-8 character (unexpected continuation byte 0x%02x)", |
273 | *s); |
274 | goto malformed; |
a0ed51b3 |
275 | } |
276 | else |
ba210ebe |
277 | uv = (uv << 6) | (*s & 0x3f); |
278 | if (uv < ouv) { |
fcc8fcf6 |
279 | /* This cannot be allowed. */ |
ba210ebe |
280 | if (dowarn) |
281 | Perl_warner(aTHX_ WARN_UTF8, |
282 | "Malformed UTF-8 character (overflow at 0x%"UVxf", byte 0x%02x)", |
283 | ouv, *s); |
284 | goto malformed; |
285 | } |
286 | s++; |
287 | ouv = uv; |
288 | } |
289 | |
fcc8fcf6 |
290 | if ((uv >= 0xd800 && uv <= 0xdfff) && |
291 | !(flags & UTF8_ALLOW_SURROGATE)) { |
ba210ebe |
292 | if (dowarn) |
293 | Perl_warner(aTHX_ WARN_UTF8, |
294 | "Malformed UTF-8 character (UTF-16 surrogate 0x%04"UVxf")", |
295 | uv); |
296 | goto malformed; |
fcc8fcf6 |
297 | } else if ((uv == 0xfffe) && |
298 | !(flags & UTF8_ALLOW_BOM)) { |
ba210ebe |
299 | if (dowarn) |
300 | Perl_warner(aTHX_ WARN_UTF8, |
301 | "Malformed UTF-8 character (byte order mark 0x%04"UVxf")", |
302 | uv); |
303 | goto malformed; |
fcc8fcf6 |
304 | } else if ((uv == 0xffff) && |
305 | !(flags & UTF8_ALLOW_FFFF)) { |
ba210ebe |
306 | if (dowarn) |
307 | Perl_warner(aTHX_ WARN_UTF8, |
fcc8fcf6 |
308 | "Malformed UTF-8 character (character 0x%04"UVxf")", |
ba210ebe |
309 | uv); |
310 | goto malformed; |
fcc8fcf6 |
311 | } else if ((expectlen > UNISKIP(uv)) && |
312 | !(flags & UTF8_ALLOW_LONG)) { |
ba210ebe |
313 | if (dowarn) |
314 | Perl_warner(aTHX_ WARN_UTF8, |
315 | "Malformed UTF-8 character (%d byte%s, need %d)", |
0c443dc2 |
316 | expectlen, expectlen == 1 ? "": "s", UNISKIP(uv)); |
ba210ebe |
317 | goto malformed; |
a0ed51b3 |
318 | } |
ba210ebe |
319 | |
a0ed51b3 |
320 | return uv; |
ba210ebe |
321 | |
322 | malformed: |
323 | |
fcc8fcf6 |
324 | if (flags & UTF8_CHECK_ONLY) { |
ba210ebe |
325 | if (retlen) |
cc366d4b |
326 | *retlen = -1; |
ba210ebe |
327 | return 0; |
328 | } |
329 | |
330 | if (retlen) |
cc366d4b |
331 | *retlen = expectlen ? expectlen : len; |
ba210ebe |
332 | |
333 | return UNICODE_REPLACEMENT_CHARACTER; |
a0ed51b3 |
334 | } |
335 | |
8e84507e |
336 | /* |
dcad2880 |
337 | =for apidoc Am|U8* s|utf8_to_uv_simple|STRLEN *retlen |
8e84507e |
338 | |
339 | Returns the character value of the first character in the string C<s> |
340 | which is assumed to be in UTF8 encoding; C<retlen> will be set to the |
341 | length, in bytes, of that character, and the pointer C<s> will be |
342 | advanced to the end of the character. |
343 | |
ba210ebe |
344 | If C<s> does not point to a well-formed UTF8 character, zero is |
345 | returned and retlen is set, if possible, to -1. |
8e84507e |
346 | |
347 | =cut |
348 | */ |
349 | |
350 | UV |
dcad2880 |
351 | Perl_utf8_to_uv_simple(pTHX_ U8* s, STRLEN* retlen) |
8e84507e |
352 | { |
dcad2880 |
353 | return Perl_utf8_to_uv(aTHX_ s, (STRLEN)-1, retlen, 0); |
8e84507e |
354 | } |
355 | |
b76347f2 |
356 | /* |
357 | =for apidoc|utf8_length|U8 *s|U8 *e |
358 | |
359 | Return the length of the UTF-8 char encoded string C<s> in characters. |
360 | Stops at string C<e>. If C<e E<lt> s> or if the scan would end up |
361 | past C<e>, return -1. |
362 | |
363 | =cut |
364 | */ |
365 | |
366 | STRLEN |
367 | Perl_utf8_length(pTHX_ U8* s, U8* e) |
368 | { |
369 | STRLEN len = 0; |
370 | |
371 | if (e < s) |
372 | return -1; |
373 | while (s < e) { |
374 | STRLEN t = UTF8SKIP(s); |
375 | |
376 | if (e - s < t) |
377 | return -1; |
378 | s += t; |
379 | len++; |
380 | } |
381 | |
382 | return len; |
383 | } |
384 | |
246fae53 |
385 | /* utf8_distance(a,b) returns the number of UTF8 characters between |
386 | the pointers a and b */ |
a0ed51b3 |
387 | |
388 | I32 |
864dbfa3 |
389 | Perl_utf8_distance(pTHX_ U8 *a, U8 *b) |
a0ed51b3 |
390 | { |
391 | I32 off = 0; |
392 | if (a < b) { |
393 | while (a < b) { |
394 | a += UTF8SKIP(a); |
395 | off--; |
396 | } |
397 | } |
398 | else { |
399 | while (b < a) { |
400 | b += UTF8SKIP(b); |
401 | off++; |
402 | } |
403 | } |
404 | return off; |
405 | } |
406 | |
407 | /* WARNING: do not use the following unless you *know* off is within bounds */ |
408 | |
409 | U8 * |
864dbfa3 |
410 | Perl_utf8_hop(pTHX_ U8 *s, I32 off) |
a0ed51b3 |
411 | { |
412 | if (off >= 0) { |
413 | while (off--) |
414 | s += UTF8SKIP(s); |
415 | } |
416 | else { |
417 | while (off++) { |
418 | s--; |
419 | if (*s & 0x80) { |
420 | while ((*s & 0xc0) == 0x80) |
421 | s--; |
422 | } |
423 | } |
424 | } |
425 | return s; |
426 | } |
427 | |
6940069f |
428 | /* |
246fae53 |
429 | =for apidoc Am|U8 *|utf8_to_bytes|U8 *s|STRLEN *len |
6940069f |
430 | |
246fae53 |
431 | Converts a string C<s> of length C<len> from UTF8 into byte encoding. |
432 | Unlike C<bytes_to_utf8>, this over-writes the original string, and |
433 | updates len to contain the new length. |
67e989fb |
434 | Returns zero on failure, setting C<len> to -1. |
6940069f |
435 | |
436 | =cut |
437 | */ |
438 | |
439 | U8 * |
246fae53 |
440 | Perl_utf8_to_bytes(pTHX_ U8* s, STRLEN *len) |
6940069f |
441 | { |
6940069f |
442 | U8 *send; |
443 | U8 *d; |
dcad2880 |
444 | U8 *save = s; |
246fae53 |
445 | |
446 | /* ensure valid UTF8 and chars < 256 before updating string */ |
dcad2880 |
447 | for (send = s + *len; s < send; ) { |
448 | U8 c = *s++; |
449 | |
9f9ab905 |
450 | if (c >= 0x80 && |
dcad2880 |
451 | ((s >= send) || |
452 | ((*s++ & 0xc0) != 0x80) || ((c & 0xfe) != 0xc2))) { |
453 | *len = -1; |
454 | return 0; |
455 | } |
246fae53 |
456 | } |
dcad2880 |
457 | |
458 | d = s = save; |
6940069f |
459 | while (s < send) { |
dcad2880 |
460 | if (*s < 0x80) { |
461 | *d++ = *s++; |
462 | } |
6940069f |
463 | else { |
ba210ebe |
464 | STRLEN ulen; |
dcad2880 |
465 | *d++ = (U8)utf8_to_uv_simple(s, &ulen); |
6940069f |
466 | s += ulen; |
6940069f |
467 | } |
468 | } |
469 | *d = '\0'; |
246fae53 |
470 | *len = d - save; |
6940069f |
471 | return save; |
472 | } |
473 | |
474 | /* |
6662521e |
475 | =for apidoc Am|U8 *|bytes_to_utf8|U8 *s|STRLEN *len |
6940069f |
476 | |
477 | Converts a string C<s> of length C<len> from ASCII into UTF8 encoding. |
6662521e |
478 | Returns a pointer to the newly-created string, and sets C<len> to |
479 | reflect the new length. |
6940069f |
480 | |
497711e7 |
481 | =cut |
6940069f |
482 | */ |
483 | |
484 | U8* |
6662521e |
485 | Perl_bytes_to_utf8(pTHX_ U8* s, STRLEN *len) |
6940069f |
486 | { |
487 | dTHR; |
488 | U8 *send; |
489 | U8 *d; |
490 | U8 *dst; |
6662521e |
491 | send = s + (*len); |
6940069f |
492 | |
6662521e |
493 | Newz(801, d, (*len) * 2 + 1, U8); |
6940069f |
494 | dst = d; |
495 | |
496 | while (s < send) { |
497 | if (*s < 0x80) |
498 | *d++ = *s++; |
499 | else { |
500 | UV uv = *s++; |
501 | *d++ = (( uv >> 6) | 0xc0); |
502 | *d++ = (( uv & 0x3f) | 0x80); |
503 | } |
504 | } |
505 | *d = '\0'; |
6662521e |
506 | *len = d-dst; |
6940069f |
507 | return dst; |
508 | } |
509 | |
a0ed51b3 |
510 | /* |
dea0fc0b |
511 | * Convert native (big-endian) or reversed (little-endian) UTF-16 to UTF-8. |
a0ed51b3 |
512 | * |
513 | * Destination must be pre-extended to 3/2 source. Do not use in-place. |
514 | * We optimize for native, for obvious reasons. */ |
515 | |
516 | U8* |
dea0fc0b |
517 | Perl_utf16_to_utf8(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 |
518 | { |
dea0fc0b |
519 | U8* pend; |
520 | U8* dstart = d; |
521 | |
522 | if (bytelen & 1) |
a7867d0a |
523 | Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen"); |
dea0fc0b |
524 | |
525 | pend = p + bytelen; |
526 | |
a0ed51b3 |
527 | while (p < pend) { |
dea0fc0b |
528 | UV uv = (p[0] << 8) + p[1]; /* UTF-16BE */ |
529 | p += 2; |
a0ed51b3 |
530 | if (uv < 0x80) { |
531 | *d++ = uv; |
532 | continue; |
533 | } |
534 | if (uv < 0x800) { |
535 | *d++ = (( uv >> 6) | 0xc0); |
536 | *d++ = (( uv & 0x3f) | 0x80); |
537 | continue; |
538 | } |
539 | if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */ |
0453d815 |
540 | dTHR; |
dea0fc0b |
541 | UV low = *p++; |
542 | if (low < 0xdc00 || low >= 0xdfff) |
543 | Perl_croak(aTHX_ "Malformed UTF-16 surrogate"); |
a0ed51b3 |
544 | uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000; |
545 | } |
546 | if (uv < 0x10000) { |
547 | *d++ = (( uv >> 12) | 0xe0); |
548 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
549 | *d++ = (( uv & 0x3f) | 0x80); |
550 | continue; |
551 | } |
552 | else { |
553 | *d++ = (( uv >> 18) | 0xf0); |
554 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
555 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
556 | *d++ = (( uv & 0x3f) | 0x80); |
557 | continue; |
558 | } |
559 | } |
dea0fc0b |
560 | *newlen = d - dstart; |
a0ed51b3 |
561 | return d; |
562 | } |
563 | |
564 | /* Note: this one is slightly destructive of the source. */ |
565 | |
566 | U8* |
dea0fc0b |
567 | Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 |
568 | { |
569 | U8* s = (U8*)p; |
570 | U8* send = s + bytelen; |
571 | while (s < send) { |
572 | U8 tmp = s[0]; |
573 | s[0] = s[1]; |
574 | s[1] = tmp; |
575 | s += 2; |
576 | } |
dea0fc0b |
577 | return utf16_to_utf8(p, d, bytelen, newlen); |
a0ed51b3 |
578 | } |
579 | |
580 | /* for now these are all defined (inefficiently) in terms of the utf8 versions */ |
581 | |
582 | bool |
864dbfa3 |
583 | Perl_is_uni_alnum(pTHX_ U32 c) |
a0ed51b3 |
584 | { |
aa6ffa16 |
585 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 |
586 | uv_to_utf8(tmpbuf, (UV)c); |
587 | return is_utf8_alnum(tmpbuf); |
588 | } |
589 | |
590 | bool |
b8c5462f |
591 | Perl_is_uni_alnumc(pTHX_ U32 c) |
592 | { |
aa6ffa16 |
593 | U8 tmpbuf[UTF8_MAXLEN]; |
b8c5462f |
594 | uv_to_utf8(tmpbuf, (UV)c); |
595 | return is_utf8_alnumc(tmpbuf); |
596 | } |
597 | |
598 | bool |
864dbfa3 |
599 | Perl_is_uni_idfirst(pTHX_ U32 c) |
a0ed51b3 |
600 | { |
aa6ffa16 |
601 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 |
602 | uv_to_utf8(tmpbuf, (UV)c); |
603 | return is_utf8_idfirst(tmpbuf); |
604 | } |
605 | |
606 | bool |
864dbfa3 |
607 | Perl_is_uni_alpha(pTHX_ U32 c) |
a0ed51b3 |
608 | { |
aa6ffa16 |
609 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 |
610 | uv_to_utf8(tmpbuf, (UV)c); |
611 | return is_utf8_alpha(tmpbuf); |
612 | } |
613 | |
614 | bool |
4d61ec05 |
615 | Perl_is_uni_ascii(pTHX_ U32 c) |
616 | { |
aa6ffa16 |
617 | U8 tmpbuf[UTF8_MAXLEN]; |
4d61ec05 |
618 | uv_to_utf8(tmpbuf, (UV)c); |
619 | return is_utf8_ascii(tmpbuf); |
620 | } |
621 | |
622 | bool |
864dbfa3 |
623 | Perl_is_uni_space(pTHX_ U32 c) |
a0ed51b3 |
624 | { |
aa6ffa16 |
625 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 |
626 | uv_to_utf8(tmpbuf, (UV)c); |
627 | return is_utf8_space(tmpbuf); |
628 | } |
629 | |
630 | bool |
864dbfa3 |
631 | Perl_is_uni_digit(pTHX_ U32 c) |
a0ed51b3 |
632 | { |
aa6ffa16 |
633 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 |
634 | uv_to_utf8(tmpbuf, (UV)c); |
635 | return is_utf8_digit(tmpbuf); |
636 | } |
637 | |
638 | bool |
864dbfa3 |
639 | Perl_is_uni_upper(pTHX_ U32 c) |
a0ed51b3 |
640 | { |
aa6ffa16 |
641 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 |
642 | uv_to_utf8(tmpbuf, (UV)c); |
643 | return is_utf8_upper(tmpbuf); |
644 | } |
645 | |
646 | bool |
864dbfa3 |
647 | Perl_is_uni_lower(pTHX_ U32 c) |
a0ed51b3 |
648 | { |
aa6ffa16 |
649 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 |
650 | uv_to_utf8(tmpbuf, (UV)c); |
651 | return is_utf8_lower(tmpbuf); |
652 | } |
653 | |
654 | bool |
b8c5462f |
655 | Perl_is_uni_cntrl(pTHX_ U32 c) |
656 | { |
aa6ffa16 |
657 | U8 tmpbuf[UTF8_MAXLEN]; |
b8c5462f |
658 | uv_to_utf8(tmpbuf, (UV)c); |
659 | return is_utf8_cntrl(tmpbuf); |
660 | } |
661 | |
662 | bool |
663 | Perl_is_uni_graph(pTHX_ U32 c) |
664 | { |
aa6ffa16 |
665 | U8 tmpbuf[UTF8_MAXLEN]; |
b8c5462f |
666 | uv_to_utf8(tmpbuf, (UV)c); |
667 | return is_utf8_graph(tmpbuf); |
668 | } |
669 | |
670 | bool |
864dbfa3 |
671 | Perl_is_uni_print(pTHX_ U32 c) |
a0ed51b3 |
672 | { |
aa6ffa16 |
673 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 |
674 | uv_to_utf8(tmpbuf, (UV)c); |
675 | return is_utf8_print(tmpbuf); |
676 | } |
677 | |
b8c5462f |
678 | bool |
f248d071 |
679 | Perl_is_uni_punct(pTHX_ U32 c) |
b8c5462f |
680 | { |
aa6ffa16 |
681 | U8 tmpbuf[UTF8_MAXLEN]; |
b8c5462f |
682 | uv_to_utf8(tmpbuf, (UV)c); |
683 | return is_utf8_punct(tmpbuf); |
684 | } |
685 | |
4d61ec05 |
686 | bool |
687 | Perl_is_uni_xdigit(pTHX_ U32 c) |
688 | { |
aa6ffa16 |
689 | U8 tmpbuf[UTF8_MAXLEN]; |
4d61ec05 |
690 | uv_to_utf8(tmpbuf, (UV)c); |
691 | return is_utf8_xdigit(tmpbuf); |
692 | } |
693 | |
a0ed51b3 |
694 | U32 |
864dbfa3 |
695 | Perl_to_uni_upper(pTHX_ U32 c) |
a0ed51b3 |
696 | { |
aa6ffa16 |
697 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 |
698 | uv_to_utf8(tmpbuf, (UV)c); |
699 | return to_utf8_upper(tmpbuf); |
700 | } |
701 | |
702 | U32 |
864dbfa3 |
703 | Perl_to_uni_title(pTHX_ U32 c) |
a0ed51b3 |
704 | { |
aa6ffa16 |
705 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 |
706 | uv_to_utf8(tmpbuf, (UV)c); |
707 | return to_utf8_title(tmpbuf); |
708 | } |
709 | |
710 | U32 |
864dbfa3 |
711 | Perl_to_uni_lower(pTHX_ U32 c) |
a0ed51b3 |
712 | { |
aa6ffa16 |
713 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 |
714 | uv_to_utf8(tmpbuf, (UV)c); |
715 | return to_utf8_lower(tmpbuf); |
716 | } |
717 | |
718 | /* for now these all assume no locale info available for Unicode > 255 */ |
719 | |
720 | bool |
864dbfa3 |
721 | Perl_is_uni_alnum_lc(pTHX_ U32 c) |
a0ed51b3 |
722 | { |
723 | return is_uni_alnum(c); /* XXX no locale support yet */ |
724 | } |
725 | |
726 | bool |
b8c5462f |
727 | Perl_is_uni_alnumc_lc(pTHX_ U32 c) |
728 | { |
729 | return is_uni_alnumc(c); /* XXX no locale support yet */ |
730 | } |
731 | |
732 | bool |
864dbfa3 |
733 | Perl_is_uni_idfirst_lc(pTHX_ U32 c) |
a0ed51b3 |
734 | { |
735 | return is_uni_idfirst(c); /* XXX no locale support yet */ |
736 | } |
737 | |
738 | bool |
864dbfa3 |
739 | Perl_is_uni_alpha_lc(pTHX_ U32 c) |
a0ed51b3 |
740 | { |
741 | return is_uni_alpha(c); /* XXX no locale support yet */ |
742 | } |
743 | |
744 | bool |
4d61ec05 |
745 | Perl_is_uni_ascii_lc(pTHX_ U32 c) |
746 | { |
747 | return is_uni_ascii(c); /* XXX no locale support yet */ |
748 | } |
749 | |
750 | bool |
864dbfa3 |
751 | Perl_is_uni_space_lc(pTHX_ U32 c) |
a0ed51b3 |
752 | { |
753 | return is_uni_space(c); /* XXX no locale support yet */ |
754 | } |
755 | |
756 | bool |
864dbfa3 |
757 | Perl_is_uni_digit_lc(pTHX_ U32 c) |
a0ed51b3 |
758 | { |
759 | return is_uni_digit(c); /* XXX no locale support yet */ |
760 | } |
761 | |
762 | bool |
864dbfa3 |
763 | Perl_is_uni_upper_lc(pTHX_ U32 c) |
a0ed51b3 |
764 | { |
765 | return is_uni_upper(c); /* XXX no locale support yet */ |
766 | } |
767 | |
768 | bool |
864dbfa3 |
769 | Perl_is_uni_lower_lc(pTHX_ U32 c) |
a0ed51b3 |
770 | { |
771 | return is_uni_lower(c); /* XXX no locale support yet */ |
772 | } |
773 | |
774 | bool |
b8c5462f |
775 | Perl_is_uni_cntrl_lc(pTHX_ U32 c) |
776 | { |
777 | return is_uni_cntrl(c); /* XXX no locale support yet */ |
778 | } |
779 | |
780 | bool |
781 | Perl_is_uni_graph_lc(pTHX_ U32 c) |
782 | { |
783 | return is_uni_graph(c); /* XXX no locale support yet */ |
784 | } |
785 | |
786 | bool |
864dbfa3 |
787 | Perl_is_uni_print_lc(pTHX_ U32 c) |
a0ed51b3 |
788 | { |
789 | return is_uni_print(c); /* XXX no locale support yet */ |
790 | } |
791 | |
b8c5462f |
792 | bool |
793 | Perl_is_uni_punct_lc(pTHX_ U32 c) |
794 | { |
795 | return is_uni_punct(c); /* XXX no locale support yet */ |
796 | } |
797 | |
4d61ec05 |
798 | bool |
799 | Perl_is_uni_xdigit_lc(pTHX_ U32 c) |
800 | { |
801 | return is_uni_xdigit(c); /* XXX no locale support yet */ |
802 | } |
803 | |
a0ed51b3 |
804 | U32 |
864dbfa3 |
805 | Perl_to_uni_upper_lc(pTHX_ U32 c) |
a0ed51b3 |
806 | { |
807 | return to_uni_upper(c); /* XXX no locale support yet */ |
808 | } |
809 | |
810 | U32 |
864dbfa3 |
811 | Perl_to_uni_title_lc(pTHX_ U32 c) |
a0ed51b3 |
812 | { |
813 | return to_uni_title(c); /* XXX no locale support yet */ |
814 | } |
815 | |
816 | U32 |
864dbfa3 |
817 | Perl_to_uni_lower_lc(pTHX_ U32 c) |
a0ed51b3 |
818 | { |
819 | return to_uni_lower(c); /* XXX no locale support yet */ |
820 | } |
821 | |
a0ed51b3 |
822 | bool |
864dbfa3 |
823 | Perl_is_utf8_alnum(pTHX_ U8 *p) |
a0ed51b3 |
824 | { |
386d01d6 |
825 | if (!is_utf8_char(p)) |
826 | return FALSE; |
a0ed51b3 |
827 | if (!PL_utf8_alnum) |
289d4f09 |
828 | /* NOTE: "IsWord", not "IsAlnum", since Alnum is a true |
829 | * descendant of isalnum(3), in other words, it doesn't |
830 | * contain the '_'. --jhi */ |
831 | PL_utf8_alnum = swash_init("utf8", "IsWord", &PL_sv_undef, 0, 0); |
a0ed51b3 |
832 | return swash_fetch(PL_utf8_alnum, p); |
833 | /* return *p == '_' || is_utf8_alpha(p) || is_utf8_digit(p); */ |
834 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ |
835 | if (!PL_utf8_alnum) |
836 | PL_utf8_alnum = swash_init("utf8", "", |
837 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); |
838 | return swash_fetch(PL_utf8_alnum, p); |
839 | #endif |
840 | } |
841 | |
842 | bool |
b8c5462f |
843 | Perl_is_utf8_alnumc(pTHX_ U8 *p) |
844 | { |
386d01d6 |
845 | if (!is_utf8_char(p)) |
846 | return FALSE; |
b8c5462f |
847 | if (!PL_utf8_alnum) |
848 | PL_utf8_alnum = swash_init("utf8", "IsAlnumC", &PL_sv_undef, 0, 0); |
849 | return swash_fetch(PL_utf8_alnum, p); |
850 | /* return is_utf8_alpha(p) || is_utf8_digit(p); */ |
851 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ |
852 | if (!PL_utf8_alnum) |
853 | PL_utf8_alnum = swash_init("utf8", "", |
854 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); |
855 | return swash_fetch(PL_utf8_alnum, p); |
856 | #endif |
857 | } |
858 | |
859 | bool |
864dbfa3 |
860 | Perl_is_utf8_idfirst(pTHX_ U8 *p) |
a0ed51b3 |
861 | { |
862 | return *p == '_' || is_utf8_alpha(p); |
863 | } |
864 | |
865 | bool |
864dbfa3 |
866 | Perl_is_utf8_alpha(pTHX_ U8 *p) |
a0ed51b3 |
867 | { |
386d01d6 |
868 | if (!is_utf8_char(p)) |
869 | return FALSE; |
a0ed51b3 |
870 | if (!PL_utf8_alpha) |
e24b16f9 |
871 | PL_utf8_alpha = swash_init("utf8", "IsAlpha", &PL_sv_undef, 0, 0); |
a0ed51b3 |
872 | return swash_fetch(PL_utf8_alpha, p); |
873 | } |
874 | |
875 | bool |
b8c5462f |
876 | Perl_is_utf8_ascii(pTHX_ U8 *p) |
877 | { |
386d01d6 |
878 | if (!is_utf8_char(p)) |
879 | return FALSE; |
b8c5462f |
880 | if (!PL_utf8_ascii) |
881 | PL_utf8_ascii = swash_init("utf8", "IsAscii", &PL_sv_undef, 0, 0); |
882 | return swash_fetch(PL_utf8_ascii, p); |
883 | } |
884 | |
885 | bool |
864dbfa3 |
886 | Perl_is_utf8_space(pTHX_ U8 *p) |
a0ed51b3 |
887 | { |
386d01d6 |
888 | if (!is_utf8_char(p)) |
889 | return FALSE; |
a0ed51b3 |
890 | if (!PL_utf8_space) |
e24b16f9 |
891 | PL_utf8_space = swash_init("utf8", "IsSpace", &PL_sv_undef, 0, 0); |
a0ed51b3 |
892 | return swash_fetch(PL_utf8_space, p); |
893 | } |
894 | |
895 | bool |
864dbfa3 |
896 | Perl_is_utf8_digit(pTHX_ U8 *p) |
a0ed51b3 |
897 | { |
386d01d6 |
898 | if (!is_utf8_char(p)) |
899 | return FALSE; |
a0ed51b3 |
900 | if (!PL_utf8_digit) |
e24b16f9 |
901 | PL_utf8_digit = swash_init("utf8", "IsDigit", &PL_sv_undef, 0, 0); |
a0ed51b3 |
902 | return swash_fetch(PL_utf8_digit, p); |
903 | } |
904 | |
905 | bool |
864dbfa3 |
906 | Perl_is_utf8_upper(pTHX_ U8 *p) |
a0ed51b3 |
907 | { |
386d01d6 |
908 | if (!is_utf8_char(p)) |
909 | return FALSE; |
a0ed51b3 |
910 | if (!PL_utf8_upper) |
e24b16f9 |
911 | PL_utf8_upper = swash_init("utf8", "IsUpper", &PL_sv_undef, 0, 0); |
a0ed51b3 |
912 | return swash_fetch(PL_utf8_upper, p); |
913 | } |
914 | |
915 | bool |
864dbfa3 |
916 | Perl_is_utf8_lower(pTHX_ U8 *p) |
a0ed51b3 |
917 | { |
386d01d6 |
918 | if (!is_utf8_char(p)) |
919 | return FALSE; |
a0ed51b3 |
920 | if (!PL_utf8_lower) |
e24b16f9 |
921 | PL_utf8_lower = swash_init("utf8", "IsLower", &PL_sv_undef, 0, 0); |
a0ed51b3 |
922 | return swash_fetch(PL_utf8_lower, p); |
923 | } |
924 | |
925 | bool |
b8c5462f |
926 | Perl_is_utf8_cntrl(pTHX_ U8 *p) |
927 | { |
386d01d6 |
928 | if (!is_utf8_char(p)) |
929 | return FALSE; |
b8c5462f |
930 | if (!PL_utf8_cntrl) |
931 | PL_utf8_cntrl = swash_init("utf8", "IsCntrl", &PL_sv_undef, 0, 0); |
932 | return swash_fetch(PL_utf8_cntrl, p); |
933 | } |
934 | |
935 | bool |
936 | Perl_is_utf8_graph(pTHX_ U8 *p) |
937 | { |
386d01d6 |
938 | if (!is_utf8_char(p)) |
939 | return FALSE; |
b8c5462f |
940 | if (!PL_utf8_graph) |
941 | PL_utf8_graph = swash_init("utf8", "IsGraph", &PL_sv_undef, 0, 0); |
942 | return swash_fetch(PL_utf8_graph, p); |
943 | } |
944 | |
945 | bool |
864dbfa3 |
946 | Perl_is_utf8_print(pTHX_ U8 *p) |
a0ed51b3 |
947 | { |
386d01d6 |
948 | if (!is_utf8_char(p)) |
949 | return FALSE; |
a0ed51b3 |
950 | if (!PL_utf8_print) |
e24b16f9 |
951 | PL_utf8_print = swash_init("utf8", "IsPrint", &PL_sv_undef, 0, 0); |
a0ed51b3 |
952 | return swash_fetch(PL_utf8_print, p); |
953 | } |
954 | |
955 | bool |
b8c5462f |
956 | Perl_is_utf8_punct(pTHX_ U8 *p) |
957 | { |
386d01d6 |
958 | if (!is_utf8_char(p)) |
959 | return FALSE; |
b8c5462f |
960 | if (!PL_utf8_punct) |
961 | PL_utf8_punct = swash_init("utf8", "IsPunct", &PL_sv_undef, 0, 0); |
962 | return swash_fetch(PL_utf8_punct, p); |
963 | } |
964 | |
965 | bool |
966 | Perl_is_utf8_xdigit(pTHX_ U8 *p) |
967 | { |
386d01d6 |
968 | if (!is_utf8_char(p)) |
969 | return FALSE; |
b8c5462f |
970 | if (!PL_utf8_xdigit) |
971 | PL_utf8_xdigit = swash_init("utf8", "IsXDigit", &PL_sv_undef, 0, 0); |
972 | return swash_fetch(PL_utf8_xdigit, p); |
973 | } |
974 | |
975 | bool |
864dbfa3 |
976 | Perl_is_utf8_mark(pTHX_ U8 *p) |
a0ed51b3 |
977 | { |
386d01d6 |
978 | if (!is_utf8_char(p)) |
979 | return FALSE; |
a0ed51b3 |
980 | if (!PL_utf8_mark) |
e24b16f9 |
981 | PL_utf8_mark = swash_init("utf8", "IsM", &PL_sv_undef, 0, 0); |
a0ed51b3 |
982 | return swash_fetch(PL_utf8_mark, p); |
983 | } |
984 | |
2104c8d9 |
985 | UV |
864dbfa3 |
986 | Perl_to_utf8_upper(pTHX_ U8 *p) |
a0ed51b3 |
987 | { |
988 | UV uv; |
989 | |
990 | if (!PL_utf8_toupper) |
e24b16f9 |
991 | PL_utf8_toupper = swash_init("utf8", "ToUpper", &PL_sv_undef, 4, 0); |
a0ed51b3 |
992 | uv = swash_fetch(PL_utf8_toupper, p); |
dcad2880 |
993 | return uv ? uv : utf8_to_uv(p,STRLEN_MAX,0,0); |
a0ed51b3 |
994 | } |
995 | |
2104c8d9 |
996 | UV |
864dbfa3 |
997 | Perl_to_utf8_title(pTHX_ U8 *p) |
a0ed51b3 |
998 | { |
999 | UV uv; |
1000 | |
1001 | if (!PL_utf8_totitle) |
e24b16f9 |
1002 | PL_utf8_totitle = swash_init("utf8", "ToTitle", &PL_sv_undef, 4, 0); |
a0ed51b3 |
1003 | uv = swash_fetch(PL_utf8_totitle, p); |
dcad2880 |
1004 | return uv ? uv : utf8_to_uv(p,STRLEN_MAX,0,0); |
a0ed51b3 |
1005 | } |
1006 | |
2104c8d9 |
1007 | UV |
864dbfa3 |
1008 | Perl_to_utf8_lower(pTHX_ U8 *p) |
a0ed51b3 |
1009 | { |
1010 | UV uv; |
1011 | |
1012 | if (!PL_utf8_tolower) |
e24b16f9 |
1013 | PL_utf8_tolower = swash_init("utf8", "ToLower", &PL_sv_undef, 4, 0); |
a0ed51b3 |
1014 | uv = swash_fetch(PL_utf8_tolower, p); |
dcad2880 |
1015 | return uv ? uv : utf8_to_uv(p,STRLEN_MAX,0,0); |
a0ed51b3 |
1016 | } |
1017 | |
1018 | /* a "swash" is a swatch hash */ |
1019 | |
1020 | SV* |
864dbfa3 |
1021 | Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none) |
a0ed51b3 |
1022 | { |
1023 | SV* retval; |
1024 | char tmpbuf[256]; |
8e84507e |
1025 | dSP; |
ce3b816e |
1026 | |
1027 | if (!gv_stashpv(pkg, 0)) { /* demand load utf8 */ |
1028 | ENTER; |
1029 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpv(pkg,0), Nullsv); |
1030 | LEAVE; |
1031 | } |
1032 | SPAGAIN; |
a0ed51b3 |
1033 | PUSHSTACKi(PERLSI_MAGIC); |
1034 | PUSHMARK(SP); |
1035 | EXTEND(SP,5); |
1036 | PUSHs(sv_2mortal(newSVpvn(pkg, strlen(pkg)))); |
1037 | PUSHs(sv_2mortal(newSVpvn(name, strlen(name)))); |
1038 | PUSHs(listsv); |
1039 | PUSHs(sv_2mortal(newSViv(minbits))); |
1040 | PUSHs(sv_2mortal(newSViv(none))); |
1041 | PUTBACK; |
1042 | ENTER; |
1043 | SAVEI32(PL_hints); |
1044 | PL_hints = 0; |
1045 | save_re_context(); |
e24b16f9 |
1046 | if (PL_curcop == &PL_compiling) /* XXX ought to be handled by lex_start */ |
a0ed51b3 |
1047 | strncpy(tmpbuf, PL_tokenbuf, sizeof tmpbuf); |
864dbfa3 |
1048 | if (call_method("SWASHNEW", G_SCALAR)) |
8e84507e |
1049 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 |
1050 | else |
e24b16f9 |
1051 | retval = &PL_sv_undef; |
a0ed51b3 |
1052 | LEAVE; |
1053 | POPSTACK; |
e24b16f9 |
1054 | if (PL_curcop == &PL_compiling) { |
a0ed51b3 |
1055 | strncpy(PL_tokenbuf, tmpbuf, sizeof tmpbuf); |
e24b16f9 |
1056 | PL_curcop->op_private = PL_hints; |
a0ed51b3 |
1057 | } |
1058 | if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV) |
cea2e8a9 |
1059 | Perl_croak(aTHX_ "SWASHNEW didn't return an HV ref"); |
a0ed51b3 |
1060 | return retval; |
1061 | } |
1062 | |
1063 | UV |
864dbfa3 |
1064 | Perl_swash_fetch(pTHX_ SV *sv, U8 *ptr) |
a0ed51b3 |
1065 | { |
1066 | HV* hv = (HV*)SvRV(sv); |
1067 | U32 klen = UTF8SKIP(ptr) - 1; |
1068 | U32 off = ptr[klen] & 127; /* NB: 64 bit always 0 when len > 1 */ |
1069 | STRLEN slen; |
1070 | STRLEN needents = (klen ? 64 : 128); |
dfe13c55 |
1071 | U8 *tmps; |
a0ed51b3 |
1072 | U32 bit; |
1073 | SV *retval; |
1074 | |
1075 | /* |
1076 | * This single-entry cache saves about 1/3 of the utf8 overhead in test |
1077 | * suite. (That is, only 7-8% overall over just a hash cache. Still, |
1078 | * it's nothing to sniff at.) Pity we usually come through at least |
1079 | * two function calls to get here... |
1080 | * |
1081 | * NB: this code assumes that swatches are never modified, once generated! |
1082 | */ |
1083 | |
1084 | if (hv == PL_last_swash_hv && |
1085 | klen == PL_last_swash_klen && |
12ae5dfc |
1086 | (!klen || memEQ((char *)ptr,(char *)PL_last_swash_key,klen)) ) |
a0ed51b3 |
1087 | { |
1088 | tmps = PL_last_swash_tmps; |
1089 | slen = PL_last_swash_slen; |
1090 | } |
1091 | else { |
1092 | /* Try our second-level swatch cache, kept in a hash. */ |
dfe13c55 |
1093 | SV** svp = hv_fetch(hv, (char*)ptr, klen, FALSE); |
a0ed51b3 |
1094 | |
1095 | /* If not cached, generate it via utf8::SWASHGET */ |
dfe13c55 |
1096 | if (!svp || !SvPOK(*svp) || !(tmps = (U8*)SvPV(*svp, slen))) { |
a0ed51b3 |
1097 | dSP; |
1098 | ENTER; |
1099 | SAVETMPS; |
1100 | save_re_context(); |
1101 | PUSHSTACKi(PERLSI_MAGIC); |
1102 | PUSHMARK(SP); |
1103 | EXTEND(SP,3); |
1104 | PUSHs((SV*)sv); |
dcad2880 |
1105 | PUSHs(sv_2mortal(newSViv(utf8_to_uv(ptr, STRLEN_MAX, 0, 0) & ~(needents - 1)))); |
a0ed51b3 |
1106 | PUSHs(sv_2mortal(newSViv(needents))); |
1107 | PUTBACK; |
864dbfa3 |
1108 | if (call_method("SWASHGET", G_SCALAR)) |
8e84507e |
1109 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 |
1110 | else |
e24b16f9 |
1111 | retval = &PL_sv_undef; |
a0ed51b3 |
1112 | POPSTACK; |
1113 | FREETMPS; |
1114 | LEAVE; |
e24b16f9 |
1115 | if (PL_curcop == &PL_compiling) |
1116 | PL_curcop->op_private = PL_hints; |
a0ed51b3 |
1117 | |
dfe13c55 |
1118 | svp = hv_store(hv, (char*)ptr, klen, retval, 0); |
a0ed51b3 |
1119 | |
dfe13c55 |
1120 | if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || slen < 8) |
cea2e8a9 |
1121 | Perl_croak(aTHX_ "SWASHGET didn't return result of proper length"); |
a0ed51b3 |
1122 | } |
1123 | |
1124 | PL_last_swash_hv = hv; |
1125 | PL_last_swash_klen = klen; |
1126 | PL_last_swash_tmps = tmps; |
1127 | PL_last_swash_slen = slen; |
1128 | if (klen) |
1129 | Copy(ptr, PL_last_swash_key, klen, U8); |
1130 | } |
1131 | |
9faf8d75 |
1132 | switch ((int)((slen << 3) / needents)) { |
a0ed51b3 |
1133 | case 1: |
1134 | bit = 1 << (off & 7); |
1135 | off >>= 3; |
1136 | return (tmps[off] & bit) != 0; |
1137 | case 8: |
1138 | return tmps[off]; |
1139 | case 16: |
1140 | off <<= 1; |
1141 | return (tmps[off] << 8) + tmps[off + 1] ; |
1142 | case 32: |
1143 | off <<= 2; |
1144 | return (tmps[off] << 24) + (tmps[off+1] << 16) + (tmps[off+2] << 8) + tmps[off + 3] ; |
1145 | } |
cea2e8a9 |
1146 | Perl_croak(aTHX_ "panic: swash_fetch"); |
a0ed51b3 |
1147 | return 0; |
1148 | } |