Commit | Line | Data |
a0ed51b3 |
1 | /* utf8.c |
2 | * |
bc89e66f |
3 | * Copyright (c) 1998-2001, 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; |
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 | |
60006e79 |
114 | if (UTF8_IS_ASCII(u)) |
386d01d6 |
115 | return 1; |
116 | |
60006e79 |
117 | if (!UTF8_IS_START(u)) |
386d01d6 |
118 | return 0; |
119 | |
9f07fdcd |
120 | len = UTF8SKIP(s); |
386d01d6 |
121 | |
60006e79 |
122 | if (len < 2 || !UTF8_IS_CONTINUATION(s[1])) |
067a85ef |
123 | return 0; |
124 | |
386d01d6 |
125 | slen = len - 1; |
126 | s++; |
067a85ef |
127 | uv = u; |
128 | ouv = uv; |
386d01d6 |
129 | while (slen--) { |
60006e79 |
130 | if (!UTF8_IS_CONTINUATION(*s)) |
386d01d6 |
131 | return 0; |
8850bf83 |
132 | uv = UTF8_ACCUMULATE(uv, *s); |
067a85ef |
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; |
1aa99e6b |
158 | U8* send; |
067a85ef |
159 | STRLEN c; |
160 | |
1aa99e6b |
161 | if (!len) |
6cd5fe39 |
162 | len = strlen((char *)s); |
1aa99e6b |
163 | send = s + len; |
164 | |
6662521e |
165 | while (x < send) { |
166 | c = is_utf8_char(x); |
067a85ef |
167 | if (!c) |
168 | return FALSE; |
6662521e |
169 | x += c; |
6662521e |
170 | } |
60006e79 |
171 | if (x != send) |
172 | return FALSE; |
067a85ef |
173 | |
174 | return TRUE; |
6662521e |
175 | } |
176 | |
67e989fb |
177 | /* |
be2c7115 |
178 | =for apidoc Am|U8* s|utf8_to_uv|STRLEN curlen|STRLEN *retlen|U32 flags |
67e989fb |
179 | |
180 | Returns the character value of the first character in the string C<s> |
ba210ebe |
181 | which is assumed to be in UTF8 encoding and no longer than C<curlen>; |
7df053ec |
182 | C<retlen> will be set to the length, in bytes, of that character. |
67e989fb |
183 | |
184 | If C<s> does not point to a well-formed UTF8 character, the behaviour |
dcad2880 |
185 | is dependent on the value of C<flags>: if it contains UTF8_CHECK_ONLY, |
186 | it is assumed that the caller will raise a warning, and this function |
28d3d195 |
187 | will silently just set C<retlen> to C<-1> and return zero. If the |
188 | C<flags> does not contain UTF8_CHECK_ONLY, warnings about |
189 | malformations will be given, C<retlen> will be set to the expected |
190 | length of the UTF-8 character in bytes, and zero will be returned. |
191 | |
192 | The C<flags> can also contain various flags to allow deviations from |
193 | the strict UTF-8 encoding (see F<utf8.h>). |
67e989fb |
194 | |
dcad2880 |
195 | =cut */ |
67e989fb |
196 | |
a0ed51b3 |
197 | UV |
dcad2880 |
198 | Perl_utf8_to_uv(pTHX_ U8* s, STRLEN curlen, STRLEN* retlen, U32 flags) |
a0ed51b3 |
199 | { |
ba210ebe |
200 | UV uv = *s, ouv; |
201 | STRLEN len = 1; |
7bf1b6bb |
202 | #ifdef EBCDIC |
203 | bool dowarn = 0; |
204 | #else |
ba210ebe |
205 | bool dowarn = ckWARN_d(WARN_UTF8); |
7bf1b6bb |
206 | #endif |
ba210ebe |
207 | STRLEN expectlen = 0; |
a0dbb045 |
208 | U32 warning = 0; |
209 | |
210 | /* This list is a superset of the UTF8_ALLOW_XXX. */ |
211 | |
212 | #define UTF8_WARN_EMPTY 1 |
213 | #define UTF8_WARN_CONTINUATION 2 |
214 | #define UTF8_WARN_NON_CONTINUATION 3 |
215 | #define UTF8_WARN_FE_FF 4 |
216 | #define UTF8_WARN_SHORT 5 |
217 | #define UTF8_WARN_OVERFLOW 6 |
218 | #define UTF8_WARN_SURROGATE 7 |
219 | #define UTF8_WARN_BOM 8 |
220 | #define UTF8_WARN_LONG 9 |
221 | #define UTF8_WARN_FFFF 10 |
222 | |
223 | if (curlen == 0 && |
224 | !(flags & UTF8_ALLOW_EMPTY)) { |
225 | warning = UTF8_WARN_EMPTY; |
0c443dc2 |
226 | goto malformed; |
227 | } |
228 | |
421a8bf2 |
229 | if (UTF8_IS_ASCII(uv)) { |
a0ed51b3 |
230 | if (retlen) |
231 | *retlen = 1; |
232 | return *s; |
233 | } |
67e989fb |
234 | |
421a8bf2 |
235 | if (UTF8_IS_CONTINUATION(uv) && |
fcc8fcf6 |
236 | !(flags & UTF8_ALLOW_CONTINUATION)) { |
a0dbb045 |
237 | warning = UTF8_WARN_CONTINUATION; |
ba210ebe |
238 | goto malformed; |
239 | } |
240 | |
421a8bf2 |
241 | if (UTF8_IS_START(uv) && curlen > 1 && !UTF8_IS_CONTINUATION(s[1]) && |
fcc8fcf6 |
242 | !(flags & UTF8_ALLOW_NON_CONTINUATION)) { |
a0dbb045 |
243 | warning = UTF8_WARN_NON_CONTINUATION; |
ba210ebe |
244 | goto malformed; |
245 | } |
fcc8fcf6 |
246 | |
247 | if ((uv == 0xfe || uv == 0xff) && |
248 | !(flags & UTF8_ALLOW_FE_FF)) { |
a0dbb045 |
249 | warning = UTF8_WARN_FE_FF; |
ba210ebe |
250 | goto malformed; |
a0ed51b3 |
251 | } |
fcc8fcf6 |
252 | |
ba210ebe |
253 | if (!(uv & 0x20)) { len = 2; uv &= 0x1f; } |
254 | else if (!(uv & 0x10)) { len = 3; uv &= 0x0f; } |
255 | else if (!(uv & 0x08)) { len = 4; uv &= 0x07; } |
256 | else if (!(uv & 0x04)) { len = 5; uv &= 0x03; } |
257 | else if (!(uv & 0x02)) { len = 6; uv &= 0x01; } |
258 | else if (!(uv & 0x01)) { len = 7; uv = 0; } |
3c77ea2b |
259 | else { len = 13; uv = 0; } /* whoa! */ |
fcc8fcf6 |
260 | |
a0ed51b3 |
261 | if (retlen) |
262 | *retlen = len; |
ba210ebe |
263 | |
264 | expectlen = len; |
265 | |
fcc8fcf6 |
266 | if ((curlen < expectlen) && |
267 | !(flags & UTF8_ALLOW_SHORT)) { |
a0dbb045 |
268 | warning = UTF8_WARN_SHORT; |
ba210ebe |
269 | goto malformed; |
270 | } |
271 | |
272 | len--; |
a0ed51b3 |
273 | s++; |
ba210ebe |
274 | ouv = uv; |
275 | |
a0ed51b3 |
276 | while (len--) { |
421a8bf2 |
277 | if (!UTF8_IS_CONTINUATION(*s) && |
278 | !(flags & UTF8_ALLOW_NON_CONTINUATION)) { |
a0dbb045 |
279 | s--; |
280 | warning = UTF8_WARN_NON_CONTINUATION; |
ba210ebe |
281 | goto malformed; |
a0ed51b3 |
282 | } |
283 | else |
8850bf83 |
284 | uv = UTF8_ACCUMULATE(uv, *s); |
a0dbb045 |
285 | if (!(uv > ouv)) { |
286 | /* These cannot be allowed. */ |
287 | if (uv == ouv) { |
288 | if (!(flags & UTF8_ALLOW_LONG)) { |
289 | warning = UTF8_WARN_LONG; |
290 | goto malformed; |
291 | } |
292 | } |
293 | else { /* uv < ouv */ |
294 | /* This cannot be allowed. */ |
295 | warning = UTF8_WARN_OVERFLOW; |
296 | goto malformed; |
297 | } |
ba210ebe |
298 | } |
299 | s++; |
300 | ouv = uv; |
301 | } |
302 | |
421a8bf2 |
303 | if (UNICODE_IS_SURROGATE(uv) && |
fcc8fcf6 |
304 | !(flags & UTF8_ALLOW_SURROGATE)) { |
a0dbb045 |
305 | warning = UTF8_WARN_SURROGATE; |
ba210ebe |
306 | goto malformed; |
421a8bf2 |
307 | } else if (UNICODE_IS_BYTE_ORDER_MARK(uv) && |
fcc8fcf6 |
308 | !(flags & UTF8_ALLOW_BOM)) { |
a0dbb045 |
309 | warning = UTF8_WARN_BOM; |
ba210ebe |
310 | goto malformed; |
fcc8fcf6 |
311 | } else if ((expectlen > UNISKIP(uv)) && |
312 | !(flags & UTF8_ALLOW_LONG)) { |
a0dbb045 |
313 | warning = UTF8_WARN_LONG; |
ba210ebe |
314 | goto malformed; |
421a8bf2 |
315 | } else if (UNICODE_IS_ILLEGAL(uv) && |
a9917092 |
316 | !(flags & UTF8_ALLOW_FFFF)) { |
a0dbb045 |
317 | warning = UTF8_WARN_FFFF; |
a9917092 |
318 | goto malformed; |
a0ed51b3 |
319 | } |
ba210ebe |
320 | |
a0ed51b3 |
321 | return uv; |
ba210ebe |
322 | |
323 | malformed: |
324 | |
fcc8fcf6 |
325 | if (flags & UTF8_CHECK_ONLY) { |
ba210ebe |
326 | if (retlen) |
cc366d4b |
327 | *retlen = -1; |
ba210ebe |
328 | return 0; |
329 | } |
330 | |
a0dbb045 |
331 | if (dowarn) { |
332 | SV* sv = sv_2mortal(newSVpv("Malformed UTF-8 character ", 0)); |
333 | |
334 | switch (warning) { |
335 | case 0: /* Intentionally empty. */ break; |
336 | case UTF8_WARN_EMPTY: |
337 | Perl_sv_catpvf(aTHX_ sv, "(empty string)"); |
338 | break; |
339 | case UTF8_WARN_CONTINUATION: |
340 | Perl_sv_catpvf(aTHX_ sv, "(unexpected continuation byte 0x%02"UVxf")", uv); |
341 | break; |
342 | case UTF8_WARN_NON_CONTINUATION: |
343 | Perl_sv_catpvf(aTHX_ sv, "(unexpected non-continuation byte 0x%02"UVxf" after start byte 0x%02"UVxf")", |
344 | (UV)s[1], uv); |
345 | break; |
346 | case UTF8_WARN_FE_FF: |
347 | Perl_sv_catpvf(aTHX_ sv, "(byte 0x%02"UVxf")", uv); |
348 | break; |
349 | case UTF8_WARN_SHORT: |
350 | Perl_sv_catpvf(aTHX_ sv, "(%d byte%s, need %d)", |
351 | curlen, curlen == 1 ? "" : "s", expectlen); |
352 | break; |
353 | case UTF8_WARN_OVERFLOW: |
354 | Perl_sv_catpvf(aTHX_ sv, "(overflow at 0x%"UVxf", byte 0x%02x)", |
355 | ouv, *s); |
356 | break; |
357 | case UTF8_WARN_SURROGATE: |
358 | Perl_sv_catpvf(aTHX_ sv, "(UTF-16 surrogate 0x%04"UVxf")", uv); |
359 | break; |
360 | case UTF8_WARN_BOM: |
361 | Perl_sv_catpvf(aTHX_ sv, "(byte order mark 0x%04"UVxf")", uv); |
362 | break; |
363 | case UTF8_WARN_LONG: |
364 | Perl_sv_catpvf(aTHX_ sv, "(%d byte%s, need %d)", |
365 | expectlen, expectlen == 1 ? "": "s", UNISKIP(uv)); |
366 | break; |
367 | case UTF8_WARN_FFFF: |
368 | Perl_sv_catpvf(aTHX_ sv, "(character 0x%04"UVxf")", uv); |
369 | break; |
370 | default: |
371 | Perl_sv_catpvf(aTHX_ sv, "(unknown reason)"); |
372 | break; |
373 | } |
374 | |
375 | if (warning) { |
376 | char *s = SvPVX(sv); |
377 | |
378 | if (PL_op) |
379 | Perl_warner(aTHX_ WARN_UTF8, |
380 | "%s in %s", s, PL_op_desc[PL_op->op_type]); |
381 | else |
382 | Perl_warner(aTHX_ WARN_UTF8, "%s", s); |
383 | } |
384 | } |
385 | |
ba210ebe |
386 | if (retlen) |
28d3d195 |
387 | *retlen = expectlen ? expectlen : len; |
ba210ebe |
388 | |
28d3d195 |
389 | return 0; |
a0ed51b3 |
390 | } |
391 | |
8e84507e |
392 | /* |
dcad2880 |
393 | =for apidoc Am|U8* s|utf8_to_uv_simple|STRLEN *retlen |
8e84507e |
394 | |
395 | Returns the character value of the first character in the string C<s> |
396 | which is assumed to be in UTF8 encoding; C<retlen> will be set to the |
7df053ec |
397 | length, in bytes, of that character. |
8e84507e |
398 | |
ba210ebe |
399 | If C<s> does not point to a well-formed UTF8 character, zero is |
400 | returned and retlen is set, if possible, to -1. |
8e84507e |
401 | |
402 | =cut |
403 | */ |
404 | |
405 | UV |
dcad2880 |
406 | Perl_utf8_to_uv_simple(pTHX_ U8* s, STRLEN* retlen) |
8e84507e |
407 | { |
2e4dc9fc |
408 | return Perl_utf8_to_uv(aTHX_ s, UTF8_MAXLEN, retlen, 0); |
8e84507e |
409 | } |
410 | |
b76347f2 |
411 | /* |
b06226ff |
412 | =for apidoc Am|STRLEN|utf8_length|U8* s|U8 *e |
b76347f2 |
413 | |
414 | Return the length of the UTF-8 char encoded string C<s> in characters. |
02eb7b47 |
415 | Stops at C<e> (inclusive). If C<e E<lt> s> or if the scan would end |
416 | up past C<e>, croaks. |
b76347f2 |
417 | |
418 | =cut |
419 | */ |
420 | |
421 | STRLEN |
422 | Perl_utf8_length(pTHX_ U8* s, U8* e) |
423 | { |
424 | STRLEN len = 0; |
425 | |
8850bf83 |
426 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g. |
427 | * the bitops (especially ~) can create illegal UTF-8. |
428 | * In other words: in Perl UTF-8 is not just for Unicode. */ |
429 | |
b76347f2 |
430 | if (e < s) |
02eb7b47 |
431 | Perl_croak(aTHX_ "panic: utf8_length: unexpected end"); |
b76347f2 |
432 | while (s < e) { |
02eb7b47 |
433 | U8 t = UTF8SKIP(s); |
b76347f2 |
434 | |
435 | if (e - s < t) |
02eb7b47 |
436 | Perl_croak(aTHX_ "panic: utf8_length: unaligned end"); |
b76347f2 |
437 | s += t; |
438 | len++; |
439 | } |
440 | |
441 | return len; |
442 | } |
443 | |
b06226ff |
444 | /* |
445 | =for apidoc Am|IV|utf8_distance|U8 *a|U8 *b |
446 | |
447 | Returns the number of UTF8 characters between the UTF-8 pointers C<a> |
448 | and C<b>. |
449 | |
450 | WARNING: use only if you *know* that the pointers point inside the |
451 | same UTF-8 buffer. |
452 | |
453 | =cut */ |
a0ed51b3 |
454 | |
02eb7b47 |
455 | IV |
864dbfa3 |
456 | Perl_utf8_distance(pTHX_ U8 *a, U8 *b) |
a0ed51b3 |
457 | { |
02eb7b47 |
458 | IV off = 0; |
459 | |
8850bf83 |
460 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g. |
461 | * the bitops (especially ~) can create illegal UTF-8. |
462 | * In other words: in Perl UTF-8 is not just for Unicode. */ |
463 | |
a0ed51b3 |
464 | if (a < b) { |
465 | while (a < b) { |
02eb7b47 |
466 | U8 c = UTF8SKIP(a); |
467 | |
468 | if (b - a < c) |
469 | Perl_croak(aTHX_ "panic: utf8_distance: unaligned end"); |
470 | a += c; |
a0ed51b3 |
471 | off--; |
472 | } |
473 | } |
474 | else { |
475 | while (b < a) { |
02eb7b47 |
476 | U8 c = UTF8SKIP(b); |
477 | |
478 | if (a - b < c) |
479 | Perl_croak(aTHX_ "panic: utf8_distance: unaligned end"); |
480 | b += c; |
a0ed51b3 |
481 | off++; |
482 | } |
483 | } |
02eb7b47 |
484 | |
a0ed51b3 |
485 | return off; |
486 | } |
487 | |
b06226ff |
488 | /* |
489 | =for apidoc Am|U8*|utf8_hop|U8 *s|I32 off |
490 | |
8850bf83 |
491 | Return the UTF-8 pointer C<s> displaced by C<off> characters, either |
492 | forward or backward. |
b06226ff |
493 | |
494 | WARNING: do not use the following unless you *know* C<off> is within |
8850bf83 |
495 | the UTF-8 data pointed to by C<s> *and* that on entry C<s> is aligned |
496 | on the first byte of character or just after the last byte of a character. |
b06226ff |
497 | |
498 | =cut */ |
a0ed51b3 |
499 | |
500 | U8 * |
864dbfa3 |
501 | Perl_utf8_hop(pTHX_ U8 *s, I32 off) |
a0ed51b3 |
502 | { |
8850bf83 |
503 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g |
504 | * the bitops (especially ~) can create illegal UTF-8. |
505 | * In other words: in Perl UTF-8 is not just for Unicode. */ |
506 | |
a0ed51b3 |
507 | if (off >= 0) { |
508 | while (off--) |
509 | s += UTF8SKIP(s); |
510 | } |
511 | else { |
512 | while (off++) { |
513 | s--; |
8850bf83 |
514 | while (UTF8_IS_CONTINUATION(*s)) |
515 | s--; |
a0ed51b3 |
516 | } |
517 | } |
518 | return s; |
519 | } |
520 | |
6940069f |
521 | /* |
246fae53 |
522 | =for apidoc Am|U8 *|utf8_to_bytes|U8 *s|STRLEN *len |
6940069f |
523 | |
246fae53 |
524 | Converts a string C<s> of length C<len> from UTF8 into byte encoding. |
525 | Unlike C<bytes_to_utf8>, this over-writes the original string, and |
526 | updates len to contain the new length. |
67e989fb |
527 | Returns zero on failure, setting C<len> to -1. |
6940069f |
528 | |
529 | =cut |
530 | */ |
531 | |
532 | U8 * |
246fae53 |
533 | Perl_utf8_to_bytes(pTHX_ U8* s, STRLEN *len) |
6940069f |
534 | { |
6940069f |
535 | U8 *send; |
536 | U8 *d; |
dcad2880 |
537 | U8 *save = s; |
246fae53 |
538 | |
539 | /* ensure valid UTF8 and chars < 256 before updating string */ |
dcad2880 |
540 | for (send = s + *len; s < send; ) { |
541 | U8 c = *s++; |
542 | |
9f9ab905 |
543 | if (c >= 0x80 && |
dcad2880 |
544 | ((s >= send) || |
545 | ((*s++ & 0xc0) != 0x80) || ((c & 0xfe) != 0xc2))) { |
546 | *len = -1; |
547 | return 0; |
548 | } |
246fae53 |
549 | } |
dcad2880 |
550 | |
551 | d = s = save; |
6940069f |
552 | while (s < send) { |
ed646e6e |
553 | STRLEN ulen; |
554 | *d++ = (U8)utf8_to_uv_simple(s, &ulen); |
555 | s += ulen; |
6940069f |
556 | } |
557 | *d = '\0'; |
246fae53 |
558 | *len = d - save; |
6940069f |
559 | return save; |
560 | } |
561 | |
562 | /* |
6662521e |
563 | =for apidoc Am|U8 *|bytes_to_utf8|U8 *s|STRLEN *len |
6940069f |
564 | |
565 | Converts a string C<s> of length C<len> from ASCII into UTF8 encoding. |
6662521e |
566 | Returns a pointer to the newly-created string, and sets C<len> to |
567 | reflect the new length. |
6940069f |
568 | |
497711e7 |
569 | =cut |
6940069f |
570 | */ |
571 | |
572 | U8* |
6662521e |
573 | Perl_bytes_to_utf8(pTHX_ U8* s, STRLEN *len) |
6940069f |
574 | { |
6940069f |
575 | U8 *send; |
576 | U8 *d; |
577 | U8 *dst; |
6662521e |
578 | send = s + (*len); |
6940069f |
579 | |
6662521e |
580 | Newz(801, d, (*len) * 2 + 1, U8); |
6940069f |
581 | dst = d; |
582 | |
583 | while (s < send) { |
584 | if (*s < 0x80) |
585 | *d++ = *s++; |
586 | else { |
587 | UV uv = *s++; |
588 | *d++ = (( uv >> 6) | 0xc0); |
589 | *d++ = (( uv & 0x3f) | 0x80); |
590 | } |
591 | } |
592 | *d = '\0'; |
6662521e |
593 | *len = d-dst; |
6940069f |
594 | return dst; |
595 | } |
596 | |
a0ed51b3 |
597 | /* |
dea0fc0b |
598 | * Convert native (big-endian) or reversed (little-endian) UTF-16 to UTF-8. |
a0ed51b3 |
599 | * |
600 | * Destination must be pre-extended to 3/2 source. Do not use in-place. |
601 | * We optimize for native, for obvious reasons. */ |
602 | |
603 | U8* |
dea0fc0b |
604 | Perl_utf16_to_utf8(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 |
605 | { |
dea0fc0b |
606 | U8* pend; |
607 | U8* dstart = d; |
608 | |
609 | if (bytelen & 1) |
a7867d0a |
610 | Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen"); |
dea0fc0b |
611 | |
612 | pend = p + bytelen; |
613 | |
a0ed51b3 |
614 | while (p < pend) { |
dea0fc0b |
615 | UV uv = (p[0] << 8) + p[1]; /* UTF-16BE */ |
616 | p += 2; |
a0ed51b3 |
617 | if (uv < 0x80) { |
618 | *d++ = uv; |
619 | continue; |
620 | } |
621 | if (uv < 0x800) { |
622 | *d++ = (( uv >> 6) | 0xc0); |
623 | *d++ = (( uv & 0x3f) | 0x80); |
624 | continue; |
625 | } |
626 | if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */ |
dea0fc0b |
627 | UV low = *p++; |
628 | if (low < 0xdc00 || low >= 0xdfff) |
629 | Perl_croak(aTHX_ "Malformed UTF-16 surrogate"); |
a0ed51b3 |
630 | uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000; |
631 | } |
632 | if (uv < 0x10000) { |
633 | *d++ = (( uv >> 12) | 0xe0); |
634 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
635 | *d++ = (( uv & 0x3f) | 0x80); |
636 | continue; |
637 | } |
638 | else { |
639 | *d++ = (( uv >> 18) | 0xf0); |
640 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
641 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
642 | *d++ = (( uv & 0x3f) | 0x80); |
643 | continue; |
644 | } |
645 | } |
dea0fc0b |
646 | *newlen = d - dstart; |
a0ed51b3 |
647 | return d; |
648 | } |
649 | |
650 | /* Note: this one is slightly destructive of the source. */ |
651 | |
652 | U8* |
dea0fc0b |
653 | Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 |
654 | { |
655 | U8* s = (U8*)p; |
656 | U8* send = s + bytelen; |
657 | while (s < send) { |
658 | U8 tmp = s[0]; |
659 | s[0] = s[1]; |
660 | s[1] = tmp; |
661 | s += 2; |
662 | } |
dea0fc0b |
663 | return utf16_to_utf8(p, d, bytelen, newlen); |
a0ed51b3 |
664 | } |
665 | |
666 | /* for now these are all defined (inefficiently) in terms of the utf8 versions */ |
667 | |
668 | bool |
864dbfa3 |
669 | Perl_is_uni_alnum(pTHX_ U32 c) |
a0ed51b3 |
670 | { |
ad391ad9 |
671 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
672 | uv_to_utf8(tmpbuf, (UV)c); |
673 | return is_utf8_alnum(tmpbuf); |
674 | } |
675 | |
676 | bool |
b8c5462f |
677 | Perl_is_uni_alnumc(pTHX_ U32 c) |
678 | { |
ad391ad9 |
679 | U8 tmpbuf[UTF8_MAXLEN+1]; |
b8c5462f |
680 | uv_to_utf8(tmpbuf, (UV)c); |
681 | return is_utf8_alnumc(tmpbuf); |
682 | } |
683 | |
684 | bool |
864dbfa3 |
685 | Perl_is_uni_idfirst(pTHX_ U32 c) |
a0ed51b3 |
686 | { |
ad391ad9 |
687 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
688 | uv_to_utf8(tmpbuf, (UV)c); |
689 | return is_utf8_idfirst(tmpbuf); |
690 | } |
691 | |
692 | bool |
864dbfa3 |
693 | Perl_is_uni_alpha(pTHX_ U32 c) |
a0ed51b3 |
694 | { |
ad391ad9 |
695 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
696 | uv_to_utf8(tmpbuf, (UV)c); |
697 | return is_utf8_alpha(tmpbuf); |
698 | } |
699 | |
700 | bool |
4d61ec05 |
701 | Perl_is_uni_ascii(pTHX_ U32 c) |
702 | { |
ad391ad9 |
703 | U8 tmpbuf[UTF8_MAXLEN+1]; |
4d61ec05 |
704 | uv_to_utf8(tmpbuf, (UV)c); |
705 | return is_utf8_ascii(tmpbuf); |
706 | } |
707 | |
708 | bool |
864dbfa3 |
709 | Perl_is_uni_space(pTHX_ U32 c) |
a0ed51b3 |
710 | { |
ad391ad9 |
711 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
712 | uv_to_utf8(tmpbuf, (UV)c); |
713 | return is_utf8_space(tmpbuf); |
714 | } |
715 | |
716 | bool |
864dbfa3 |
717 | Perl_is_uni_digit(pTHX_ U32 c) |
a0ed51b3 |
718 | { |
ad391ad9 |
719 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
720 | uv_to_utf8(tmpbuf, (UV)c); |
721 | return is_utf8_digit(tmpbuf); |
722 | } |
723 | |
724 | bool |
864dbfa3 |
725 | Perl_is_uni_upper(pTHX_ U32 c) |
a0ed51b3 |
726 | { |
ad391ad9 |
727 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
728 | uv_to_utf8(tmpbuf, (UV)c); |
729 | return is_utf8_upper(tmpbuf); |
730 | } |
731 | |
732 | bool |
864dbfa3 |
733 | Perl_is_uni_lower(pTHX_ U32 c) |
a0ed51b3 |
734 | { |
ad391ad9 |
735 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
736 | uv_to_utf8(tmpbuf, (UV)c); |
737 | return is_utf8_lower(tmpbuf); |
738 | } |
739 | |
740 | bool |
b8c5462f |
741 | Perl_is_uni_cntrl(pTHX_ U32 c) |
742 | { |
ad391ad9 |
743 | U8 tmpbuf[UTF8_MAXLEN+1]; |
b8c5462f |
744 | uv_to_utf8(tmpbuf, (UV)c); |
745 | return is_utf8_cntrl(tmpbuf); |
746 | } |
747 | |
748 | bool |
749 | Perl_is_uni_graph(pTHX_ U32 c) |
750 | { |
ad391ad9 |
751 | U8 tmpbuf[UTF8_MAXLEN+1]; |
b8c5462f |
752 | uv_to_utf8(tmpbuf, (UV)c); |
753 | return is_utf8_graph(tmpbuf); |
754 | } |
755 | |
756 | bool |
864dbfa3 |
757 | Perl_is_uni_print(pTHX_ U32 c) |
a0ed51b3 |
758 | { |
ad391ad9 |
759 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
760 | uv_to_utf8(tmpbuf, (UV)c); |
761 | return is_utf8_print(tmpbuf); |
762 | } |
763 | |
b8c5462f |
764 | bool |
f248d071 |
765 | Perl_is_uni_punct(pTHX_ U32 c) |
b8c5462f |
766 | { |
ad391ad9 |
767 | U8 tmpbuf[UTF8_MAXLEN+1]; |
b8c5462f |
768 | uv_to_utf8(tmpbuf, (UV)c); |
769 | return is_utf8_punct(tmpbuf); |
770 | } |
771 | |
4d61ec05 |
772 | bool |
773 | Perl_is_uni_xdigit(pTHX_ U32 c) |
774 | { |
ad391ad9 |
775 | U8 tmpbuf[UTF8_MAXLEN+1]; |
4d61ec05 |
776 | uv_to_utf8(tmpbuf, (UV)c); |
777 | return is_utf8_xdigit(tmpbuf); |
778 | } |
779 | |
a0ed51b3 |
780 | U32 |
864dbfa3 |
781 | Perl_to_uni_upper(pTHX_ U32 c) |
a0ed51b3 |
782 | { |
ad391ad9 |
783 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
784 | uv_to_utf8(tmpbuf, (UV)c); |
785 | return to_utf8_upper(tmpbuf); |
786 | } |
787 | |
788 | U32 |
864dbfa3 |
789 | Perl_to_uni_title(pTHX_ U32 c) |
a0ed51b3 |
790 | { |
ad391ad9 |
791 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
792 | uv_to_utf8(tmpbuf, (UV)c); |
793 | return to_utf8_title(tmpbuf); |
794 | } |
795 | |
796 | U32 |
864dbfa3 |
797 | Perl_to_uni_lower(pTHX_ U32 c) |
a0ed51b3 |
798 | { |
ad391ad9 |
799 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
800 | uv_to_utf8(tmpbuf, (UV)c); |
801 | return to_utf8_lower(tmpbuf); |
802 | } |
803 | |
804 | /* for now these all assume no locale info available for Unicode > 255 */ |
805 | |
806 | bool |
864dbfa3 |
807 | Perl_is_uni_alnum_lc(pTHX_ U32 c) |
a0ed51b3 |
808 | { |
809 | return is_uni_alnum(c); /* XXX no locale support yet */ |
810 | } |
811 | |
812 | bool |
b8c5462f |
813 | Perl_is_uni_alnumc_lc(pTHX_ U32 c) |
814 | { |
815 | return is_uni_alnumc(c); /* XXX no locale support yet */ |
816 | } |
817 | |
818 | bool |
864dbfa3 |
819 | Perl_is_uni_idfirst_lc(pTHX_ U32 c) |
a0ed51b3 |
820 | { |
821 | return is_uni_idfirst(c); /* XXX no locale support yet */ |
822 | } |
823 | |
824 | bool |
864dbfa3 |
825 | Perl_is_uni_alpha_lc(pTHX_ U32 c) |
a0ed51b3 |
826 | { |
827 | return is_uni_alpha(c); /* XXX no locale support yet */ |
828 | } |
829 | |
830 | bool |
4d61ec05 |
831 | Perl_is_uni_ascii_lc(pTHX_ U32 c) |
832 | { |
833 | return is_uni_ascii(c); /* XXX no locale support yet */ |
834 | } |
835 | |
836 | bool |
864dbfa3 |
837 | Perl_is_uni_space_lc(pTHX_ U32 c) |
a0ed51b3 |
838 | { |
839 | return is_uni_space(c); /* XXX no locale support yet */ |
840 | } |
841 | |
842 | bool |
864dbfa3 |
843 | Perl_is_uni_digit_lc(pTHX_ U32 c) |
a0ed51b3 |
844 | { |
845 | return is_uni_digit(c); /* XXX no locale support yet */ |
846 | } |
847 | |
848 | bool |
864dbfa3 |
849 | Perl_is_uni_upper_lc(pTHX_ U32 c) |
a0ed51b3 |
850 | { |
851 | return is_uni_upper(c); /* XXX no locale support yet */ |
852 | } |
853 | |
854 | bool |
864dbfa3 |
855 | Perl_is_uni_lower_lc(pTHX_ U32 c) |
a0ed51b3 |
856 | { |
857 | return is_uni_lower(c); /* XXX no locale support yet */ |
858 | } |
859 | |
860 | bool |
b8c5462f |
861 | Perl_is_uni_cntrl_lc(pTHX_ U32 c) |
862 | { |
863 | return is_uni_cntrl(c); /* XXX no locale support yet */ |
864 | } |
865 | |
866 | bool |
867 | Perl_is_uni_graph_lc(pTHX_ U32 c) |
868 | { |
869 | return is_uni_graph(c); /* XXX no locale support yet */ |
870 | } |
871 | |
872 | bool |
864dbfa3 |
873 | Perl_is_uni_print_lc(pTHX_ U32 c) |
a0ed51b3 |
874 | { |
875 | return is_uni_print(c); /* XXX no locale support yet */ |
876 | } |
877 | |
b8c5462f |
878 | bool |
879 | Perl_is_uni_punct_lc(pTHX_ U32 c) |
880 | { |
881 | return is_uni_punct(c); /* XXX no locale support yet */ |
882 | } |
883 | |
4d61ec05 |
884 | bool |
885 | Perl_is_uni_xdigit_lc(pTHX_ U32 c) |
886 | { |
887 | return is_uni_xdigit(c); /* XXX no locale support yet */ |
888 | } |
889 | |
a0ed51b3 |
890 | U32 |
864dbfa3 |
891 | Perl_to_uni_upper_lc(pTHX_ U32 c) |
a0ed51b3 |
892 | { |
893 | return to_uni_upper(c); /* XXX no locale support yet */ |
894 | } |
895 | |
896 | U32 |
864dbfa3 |
897 | Perl_to_uni_title_lc(pTHX_ U32 c) |
a0ed51b3 |
898 | { |
899 | return to_uni_title(c); /* XXX no locale support yet */ |
900 | } |
901 | |
902 | U32 |
864dbfa3 |
903 | Perl_to_uni_lower_lc(pTHX_ U32 c) |
a0ed51b3 |
904 | { |
905 | return to_uni_lower(c); /* XXX no locale support yet */ |
906 | } |
907 | |
a0ed51b3 |
908 | bool |
864dbfa3 |
909 | Perl_is_utf8_alnum(pTHX_ U8 *p) |
a0ed51b3 |
910 | { |
386d01d6 |
911 | if (!is_utf8_char(p)) |
912 | return FALSE; |
a0ed51b3 |
913 | if (!PL_utf8_alnum) |
289d4f09 |
914 | /* NOTE: "IsWord", not "IsAlnum", since Alnum is a true |
915 | * descendant of isalnum(3), in other words, it doesn't |
916 | * contain the '_'. --jhi */ |
917 | PL_utf8_alnum = swash_init("utf8", "IsWord", &PL_sv_undef, 0, 0); |
a0ed51b3 |
918 | return swash_fetch(PL_utf8_alnum, p); |
919 | /* return *p == '_' || is_utf8_alpha(p) || is_utf8_digit(p); */ |
920 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ |
921 | if (!PL_utf8_alnum) |
922 | PL_utf8_alnum = swash_init("utf8", "", |
923 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); |
924 | return swash_fetch(PL_utf8_alnum, p); |
925 | #endif |
926 | } |
927 | |
928 | bool |
b8c5462f |
929 | Perl_is_utf8_alnumc(pTHX_ U8 *p) |
930 | { |
386d01d6 |
931 | if (!is_utf8_char(p)) |
932 | return FALSE; |
b8c5462f |
933 | if (!PL_utf8_alnum) |
934 | PL_utf8_alnum = swash_init("utf8", "IsAlnumC", &PL_sv_undef, 0, 0); |
935 | return swash_fetch(PL_utf8_alnum, p); |
936 | /* return is_utf8_alpha(p) || is_utf8_digit(p); */ |
937 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ |
938 | if (!PL_utf8_alnum) |
939 | PL_utf8_alnum = swash_init("utf8", "", |
940 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); |
941 | return swash_fetch(PL_utf8_alnum, p); |
942 | #endif |
943 | } |
944 | |
945 | bool |
864dbfa3 |
946 | Perl_is_utf8_idfirst(pTHX_ U8 *p) |
a0ed51b3 |
947 | { |
948 | return *p == '_' || is_utf8_alpha(p); |
949 | } |
950 | |
951 | bool |
864dbfa3 |
952 | Perl_is_utf8_alpha(pTHX_ U8 *p) |
a0ed51b3 |
953 | { |
386d01d6 |
954 | if (!is_utf8_char(p)) |
955 | return FALSE; |
a0ed51b3 |
956 | if (!PL_utf8_alpha) |
e24b16f9 |
957 | PL_utf8_alpha = swash_init("utf8", "IsAlpha", &PL_sv_undef, 0, 0); |
a0ed51b3 |
958 | return swash_fetch(PL_utf8_alpha, p); |
959 | } |
960 | |
961 | bool |
b8c5462f |
962 | Perl_is_utf8_ascii(pTHX_ U8 *p) |
963 | { |
386d01d6 |
964 | if (!is_utf8_char(p)) |
965 | return FALSE; |
b8c5462f |
966 | if (!PL_utf8_ascii) |
967 | PL_utf8_ascii = swash_init("utf8", "IsAscii", &PL_sv_undef, 0, 0); |
968 | return swash_fetch(PL_utf8_ascii, p); |
969 | } |
970 | |
971 | bool |
864dbfa3 |
972 | Perl_is_utf8_space(pTHX_ U8 *p) |
a0ed51b3 |
973 | { |
386d01d6 |
974 | if (!is_utf8_char(p)) |
975 | return FALSE; |
a0ed51b3 |
976 | if (!PL_utf8_space) |
3bec3564 |
977 | PL_utf8_space = swash_init("utf8", "IsSpacePerl", &PL_sv_undef, 0, 0); |
a0ed51b3 |
978 | return swash_fetch(PL_utf8_space, p); |
979 | } |
980 | |
981 | bool |
864dbfa3 |
982 | Perl_is_utf8_digit(pTHX_ U8 *p) |
a0ed51b3 |
983 | { |
386d01d6 |
984 | if (!is_utf8_char(p)) |
985 | return FALSE; |
a0ed51b3 |
986 | if (!PL_utf8_digit) |
e24b16f9 |
987 | PL_utf8_digit = swash_init("utf8", "IsDigit", &PL_sv_undef, 0, 0); |
a0ed51b3 |
988 | return swash_fetch(PL_utf8_digit, p); |
989 | } |
990 | |
991 | bool |
864dbfa3 |
992 | Perl_is_utf8_upper(pTHX_ U8 *p) |
a0ed51b3 |
993 | { |
386d01d6 |
994 | if (!is_utf8_char(p)) |
995 | return FALSE; |
a0ed51b3 |
996 | if (!PL_utf8_upper) |
e24b16f9 |
997 | PL_utf8_upper = swash_init("utf8", "IsUpper", &PL_sv_undef, 0, 0); |
a0ed51b3 |
998 | return swash_fetch(PL_utf8_upper, p); |
999 | } |
1000 | |
1001 | bool |
864dbfa3 |
1002 | Perl_is_utf8_lower(pTHX_ U8 *p) |
a0ed51b3 |
1003 | { |
386d01d6 |
1004 | if (!is_utf8_char(p)) |
1005 | return FALSE; |
a0ed51b3 |
1006 | if (!PL_utf8_lower) |
e24b16f9 |
1007 | PL_utf8_lower = swash_init("utf8", "IsLower", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1008 | return swash_fetch(PL_utf8_lower, p); |
1009 | } |
1010 | |
1011 | bool |
b8c5462f |
1012 | Perl_is_utf8_cntrl(pTHX_ U8 *p) |
1013 | { |
386d01d6 |
1014 | if (!is_utf8_char(p)) |
1015 | return FALSE; |
b8c5462f |
1016 | if (!PL_utf8_cntrl) |
1017 | PL_utf8_cntrl = swash_init("utf8", "IsCntrl", &PL_sv_undef, 0, 0); |
1018 | return swash_fetch(PL_utf8_cntrl, p); |
1019 | } |
1020 | |
1021 | bool |
1022 | Perl_is_utf8_graph(pTHX_ U8 *p) |
1023 | { |
386d01d6 |
1024 | if (!is_utf8_char(p)) |
1025 | return FALSE; |
b8c5462f |
1026 | if (!PL_utf8_graph) |
1027 | PL_utf8_graph = swash_init("utf8", "IsGraph", &PL_sv_undef, 0, 0); |
1028 | return swash_fetch(PL_utf8_graph, p); |
1029 | } |
1030 | |
1031 | bool |
864dbfa3 |
1032 | Perl_is_utf8_print(pTHX_ U8 *p) |
a0ed51b3 |
1033 | { |
386d01d6 |
1034 | if (!is_utf8_char(p)) |
1035 | return FALSE; |
a0ed51b3 |
1036 | if (!PL_utf8_print) |
e24b16f9 |
1037 | PL_utf8_print = swash_init("utf8", "IsPrint", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1038 | return swash_fetch(PL_utf8_print, p); |
1039 | } |
1040 | |
1041 | bool |
b8c5462f |
1042 | Perl_is_utf8_punct(pTHX_ U8 *p) |
1043 | { |
386d01d6 |
1044 | if (!is_utf8_char(p)) |
1045 | return FALSE; |
b8c5462f |
1046 | if (!PL_utf8_punct) |
1047 | PL_utf8_punct = swash_init("utf8", "IsPunct", &PL_sv_undef, 0, 0); |
1048 | return swash_fetch(PL_utf8_punct, p); |
1049 | } |
1050 | |
1051 | bool |
1052 | Perl_is_utf8_xdigit(pTHX_ U8 *p) |
1053 | { |
386d01d6 |
1054 | if (!is_utf8_char(p)) |
1055 | return FALSE; |
b8c5462f |
1056 | if (!PL_utf8_xdigit) |
1057 | PL_utf8_xdigit = swash_init("utf8", "IsXDigit", &PL_sv_undef, 0, 0); |
1058 | return swash_fetch(PL_utf8_xdigit, p); |
1059 | } |
1060 | |
1061 | bool |
864dbfa3 |
1062 | Perl_is_utf8_mark(pTHX_ U8 *p) |
a0ed51b3 |
1063 | { |
386d01d6 |
1064 | if (!is_utf8_char(p)) |
1065 | return FALSE; |
a0ed51b3 |
1066 | if (!PL_utf8_mark) |
e24b16f9 |
1067 | PL_utf8_mark = swash_init("utf8", "IsM", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1068 | return swash_fetch(PL_utf8_mark, p); |
1069 | } |
1070 | |
2104c8d9 |
1071 | UV |
864dbfa3 |
1072 | Perl_to_utf8_upper(pTHX_ U8 *p) |
a0ed51b3 |
1073 | { |
1074 | UV uv; |
1075 | |
1076 | if (!PL_utf8_toupper) |
e24b16f9 |
1077 | PL_utf8_toupper = swash_init("utf8", "ToUpper", &PL_sv_undef, 4, 0); |
a0ed51b3 |
1078 | uv = swash_fetch(PL_utf8_toupper, p); |
756820e3 |
1079 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
a0ed51b3 |
1080 | } |
1081 | |
2104c8d9 |
1082 | UV |
864dbfa3 |
1083 | Perl_to_utf8_title(pTHX_ U8 *p) |
a0ed51b3 |
1084 | { |
1085 | UV uv; |
1086 | |
1087 | if (!PL_utf8_totitle) |
e24b16f9 |
1088 | PL_utf8_totitle = swash_init("utf8", "ToTitle", &PL_sv_undef, 4, 0); |
a0ed51b3 |
1089 | uv = swash_fetch(PL_utf8_totitle, p); |
756820e3 |
1090 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
a0ed51b3 |
1091 | } |
1092 | |
2104c8d9 |
1093 | UV |
864dbfa3 |
1094 | Perl_to_utf8_lower(pTHX_ U8 *p) |
a0ed51b3 |
1095 | { |
1096 | UV uv; |
1097 | |
1098 | if (!PL_utf8_tolower) |
e24b16f9 |
1099 | PL_utf8_tolower = swash_init("utf8", "ToLower", &PL_sv_undef, 4, 0); |
a0ed51b3 |
1100 | uv = swash_fetch(PL_utf8_tolower, p); |
756820e3 |
1101 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
a0ed51b3 |
1102 | } |
1103 | |
1104 | /* a "swash" is a swatch hash */ |
1105 | |
1106 | SV* |
864dbfa3 |
1107 | Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none) |
a0ed51b3 |
1108 | { |
1109 | SV* retval; |
bf1fed83 |
1110 | SV* tokenbufsv = sv_2mortal(NEWSV(0,0)); |
8e84507e |
1111 | dSP; |
ce3b816e |
1112 | |
1113 | if (!gv_stashpv(pkg, 0)) { /* demand load utf8 */ |
1114 | ENTER; |
1115 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpv(pkg,0), Nullsv); |
1116 | LEAVE; |
1117 | } |
1118 | SPAGAIN; |
a0ed51b3 |
1119 | PUSHSTACKi(PERLSI_MAGIC); |
1120 | PUSHMARK(SP); |
1121 | EXTEND(SP,5); |
1122 | PUSHs(sv_2mortal(newSVpvn(pkg, strlen(pkg)))); |
1123 | PUSHs(sv_2mortal(newSVpvn(name, strlen(name)))); |
1124 | PUSHs(listsv); |
1125 | PUSHs(sv_2mortal(newSViv(minbits))); |
1126 | PUSHs(sv_2mortal(newSViv(none))); |
1127 | PUTBACK; |
1128 | ENTER; |
1129 | SAVEI32(PL_hints); |
1130 | PL_hints = 0; |
1131 | save_re_context(); |
bf1fed83 |
1132 | if (PL_curcop == &PL_compiling) |
1133 | /* XXX ought to be handled by lex_start */ |
1134 | sv_setpv(tokenbufsv, PL_tokenbuf); |
864dbfa3 |
1135 | if (call_method("SWASHNEW", G_SCALAR)) |
8e84507e |
1136 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 |
1137 | else |
e24b16f9 |
1138 | retval = &PL_sv_undef; |
a0ed51b3 |
1139 | LEAVE; |
1140 | POPSTACK; |
e24b16f9 |
1141 | if (PL_curcop == &PL_compiling) { |
bf1fed83 |
1142 | STRLEN len; |
1143 | char* pv = SvPV(tokenbufsv, len); |
1144 | |
1145 | Copy(pv, PL_tokenbuf, len+1, char); |
e24b16f9 |
1146 | PL_curcop->op_private = PL_hints; |
a0ed51b3 |
1147 | } |
1148 | if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV) |
cea2e8a9 |
1149 | Perl_croak(aTHX_ "SWASHNEW didn't return an HV ref"); |
a0ed51b3 |
1150 | return retval; |
1151 | } |
1152 | |
1153 | UV |
864dbfa3 |
1154 | Perl_swash_fetch(pTHX_ SV *sv, U8 *ptr) |
a0ed51b3 |
1155 | { |
1156 | HV* hv = (HV*)SvRV(sv); |
1157 | U32 klen = UTF8SKIP(ptr) - 1; |
1158 | U32 off = ptr[klen] & 127; /* NB: 64 bit always 0 when len > 1 */ |
1159 | STRLEN slen; |
1160 | STRLEN needents = (klen ? 64 : 128); |
dfe13c55 |
1161 | U8 *tmps; |
a0ed51b3 |
1162 | U32 bit; |
1163 | SV *retval; |
1164 | |
1165 | /* |
1166 | * This single-entry cache saves about 1/3 of the utf8 overhead in test |
1167 | * suite. (That is, only 7-8% overall over just a hash cache. Still, |
1168 | * it's nothing to sniff at.) Pity we usually come through at least |
1169 | * two function calls to get here... |
1170 | * |
1171 | * NB: this code assumes that swatches are never modified, once generated! |
1172 | */ |
1173 | |
1174 | if (hv == PL_last_swash_hv && |
1175 | klen == PL_last_swash_klen && |
12ae5dfc |
1176 | (!klen || memEQ((char *)ptr,(char *)PL_last_swash_key,klen)) ) |
a0ed51b3 |
1177 | { |
1178 | tmps = PL_last_swash_tmps; |
1179 | slen = PL_last_swash_slen; |
1180 | } |
1181 | else { |
1182 | /* Try our second-level swatch cache, kept in a hash. */ |
dfe13c55 |
1183 | SV** svp = hv_fetch(hv, (char*)ptr, klen, FALSE); |
a0ed51b3 |
1184 | |
1185 | /* If not cached, generate it via utf8::SWASHGET */ |
dfe13c55 |
1186 | if (!svp || !SvPOK(*svp) || !(tmps = (U8*)SvPV(*svp, slen))) { |
a0ed51b3 |
1187 | dSP; |
1188 | ENTER; |
1189 | SAVETMPS; |
1190 | save_re_context(); |
1191 | PUSHSTACKi(PERLSI_MAGIC); |
1192 | PUSHMARK(SP); |
1193 | EXTEND(SP,3); |
1194 | PUSHs((SV*)sv); |
756820e3 |
1195 | PUSHs(sv_2mortal(newSViv(utf8_to_uv(ptr, UTF8_MAXLEN, 0, 0) & ~(needents - 1)))); |
a0ed51b3 |
1196 | PUSHs(sv_2mortal(newSViv(needents))); |
1197 | PUTBACK; |
864dbfa3 |
1198 | if (call_method("SWASHGET", G_SCALAR)) |
8e84507e |
1199 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 |
1200 | else |
e24b16f9 |
1201 | retval = &PL_sv_undef; |
a0ed51b3 |
1202 | POPSTACK; |
1203 | FREETMPS; |
1204 | LEAVE; |
e24b16f9 |
1205 | if (PL_curcop == &PL_compiling) |
1206 | PL_curcop->op_private = PL_hints; |
a0ed51b3 |
1207 | |
dfe13c55 |
1208 | svp = hv_store(hv, (char*)ptr, klen, retval, 0); |
a0ed51b3 |
1209 | |
dfe13c55 |
1210 | if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || slen < 8) |
cea2e8a9 |
1211 | Perl_croak(aTHX_ "SWASHGET didn't return result of proper length"); |
a0ed51b3 |
1212 | } |
1213 | |
1214 | PL_last_swash_hv = hv; |
1215 | PL_last_swash_klen = klen; |
1216 | PL_last_swash_tmps = tmps; |
1217 | PL_last_swash_slen = slen; |
1218 | if (klen) |
1219 | Copy(ptr, PL_last_swash_key, klen, U8); |
1220 | } |
1221 | |
9faf8d75 |
1222 | switch ((int)((slen << 3) / needents)) { |
a0ed51b3 |
1223 | case 1: |
1224 | bit = 1 << (off & 7); |
1225 | off >>= 3; |
1226 | return (tmps[off] & bit) != 0; |
1227 | case 8: |
1228 | return tmps[off]; |
1229 | case 16: |
1230 | off <<= 1; |
1231 | return (tmps[off] << 8) + tmps[off + 1] ; |
1232 | case 32: |
1233 | off <<= 2; |
1234 | return (tmps[off] << 24) + (tmps[off+1] << 16) + (tmps[off+2] << 8) + tmps[off + 3] ; |
1235 | } |
cea2e8a9 |
1236 | Perl_croak(aTHX_ "panic: swash_fetch"); |
a0ed51b3 |
1237 | return 0; |
1238 | } |