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 | |
eebe1485 |
29 | /* |
30 | =for apidoc A|U8*|uv_to_utf8|U8 *d|UV uv |
31 | |
32 | Adds the UTF8 representation of the Unicode codepoint C<uv> to the end |
33 | of the string C<d>; C<d> should be have at least C<UTF8_MAXLEN+1> free |
34 | bytes available. The return value is the pointer to the byte after the |
35 | end of the new character. In other words, |
36 | |
37 | d = uv_to_utf8(d, uv); |
38 | |
39 | is the recommended Unicode-aware way of saying |
40 | |
41 | *(d++) = uv; |
42 | |
43 | =cut |
44 | */ |
45 | |
dfe13c55 |
46 | U8 * |
eebe1485 |
47 | Perl_uv_to_utf8(pTHX_ U8 *d, UV uv) |
a0ed51b3 |
48 | { |
49 | if (uv < 0x80) { |
50 | *d++ = uv; |
51 | return d; |
52 | } |
53 | if (uv < 0x800) { |
54 | *d++ = (( uv >> 6) | 0xc0); |
55 | *d++ = (( uv & 0x3f) | 0x80); |
56 | return d; |
57 | } |
58 | if (uv < 0x10000) { |
59 | *d++ = (( uv >> 12) | 0xe0); |
60 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
61 | *d++ = (( uv & 0x3f) | 0x80); |
62 | return d; |
63 | } |
64 | if (uv < 0x200000) { |
65 | *d++ = (( uv >> 18) | 0xf0); |
66 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
67 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
68 | *d++ = (( uv & 0x3f) | 0x80); |
69 | return d; |
70 | } |
71 | if (uv < 0x4000000) { |
72 | *d++ = (( uv >> 24) | 0xf8); |
73 | *d++ = (((uv >> 18) & 0x3f) | 0x80); |
74 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
75 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
76 | *d++ = (( uv & 0x3f) | 0x80); |
77 | return d; |
78 | } |
79 | if (uv < 0x80000000) { |
80 | *d++ = (( uv >> 30) | 0xfc); |
81 | *d++ = (((uv >> 24) & 0x3f) | 0x80); |
82 | *d++ = (((uv >> 18) & 0x3f) | 0x80); |
83 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
84 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
85 | *d++ = (( uv & 0x3f) | 0x80); |
86 | return d; |
87 | } |
6b8eaf93 |
88 | #ifdef HAS_QUAD |
d7578b48 |
89 | if (uv < UTF8_QUAD_MAX) |
a0ed51b3 |
90 | #endif |
91 | { |
92 | *d++ = 0xfe; /* Can't match U+FEFF! */ |
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 | } |
6b8eaf93 |
101 | #ifdef HAS_QUAD |
a0ed51b3 |
102 | { |
103 | *d++ = 0xff; /* Can't match U+FFFE! */ |
3c77ea2b |
104 | *d++ = 0x80; /* 6 Reserved bits */ |
105 | *d++ = (((uv >> 60) & 0x0f) | 0x80); /* 2 Reserved bits */ |
106 | *d++ = (((uv >> 54) & 0x3f) | 0x80); |
107 | *d++ = (((uv >> 48) & 0x3f) | 0x80); |
108 | *d++ = (((uv >> 42) & 0x3f) | 0x80); |
a0ed51b3 |
109 | *d++ = (((uv >> 36) & 0x3f) | 0x80); |
110 | *d++ = (((uv >> 30) & 0x3f) | 0x80); |
111 | *d++ = (((uv >> 24) & 0x3f) | 0x80); |
112 | *d++ = (((uv >> 18) & 0x3f) | 0x80); |
113 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
114 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
115 | *d++ = (( uv & 0x3f) | 0x80); |
116 | return d; |
117 | } |
118 | #endif |
119 | } |
120 | |
eebe1485 |
121 | /* |
122 | =for apidoc A|STRLEN|is_utf8_char|U8 *s |
123 | |
5da9da9e |
124 | Tests if some arbitrary number of bytes begins in a valid UTF-8 |
125 | character. Note that an ASCII character is a valid UTF-8 character. |
126 | The actual number of bytes in the UTF-8 character will be returned if |
127 | it is valid, otherwise 0. |
eebe1485 |
128 | |
5da9da9e |
129 | =cut */ |
067a85ef |
130 | STRLEN |
386d01d6 |
131 | Perl_is_utf8_char(pTHX_ U8 *s) |
132 | { |
133 | U8 u = *s; |
067a85ef |
134 | STRLEN slen, len; |
135 | UV uv, ouv; |
386d01d6 |
136 | |
60006e79 |
137 | if (UTF8_IS_ASCII(u)) |
386d01d6 |
138 | return 1; |
139 | |
60006e79 |
140 | if (!UTF8_IS_START(u)) |
386d01d6 |
141 | return 0; |
142 | |
9f07fdcd |
143 | len = UTF8SKIP(s); |
386d01d6 |
144 | |
60006e79 |
145 | if (len < 2 || !UTF8_IS_CONTINUATION(s[1])) |
067a85ef |
146 | return 0; |
147 | |
386d01d6 |
148 | slen = len - 1; |
149 | s++; |
067a85ef |
150 | uv = u; |
151 | ouv = uv; |
386d01d6 |
152 | while (slen--) { |
60006e79 |
153 | if (!UTF8_IS_CONTINUATION(*s)) |
386d01d6 |
154 | return 0; |
8850bf83 |
155 | uv = UTF8_ACCUMULATE(uv, *s); |
067a85ef |
156 | if (uv < ouv) |
157 | return 0; |
158 | ouv = uv; |
386d01d6 |
159 | s++; |
160 | } |
067a85ef |
161 | |
5bbb0b5a |
162 | if (UNISKIP(uv) < len) |
067a85ef |
163 | return 0; |
164 | |
386d01d6 |
165 | return len; |
166 | } |
167 | |
6662521e |
168 | /* |
eebe1485 |
169 | =for apidoc A|bool|is_utf8_string|U8 *s|STRLEN len |
6662521e |
170 | |
5da9da9e |
171 | Returns true if first C<len> bytes of the given string form a valid UTF8 |
172 | string, false otherwise. Note that 'a valid UTF8 string' does not mean |
173 | 'a string that contains UTF8' because a valid ASCII string is a valid |
174 | UTF8 string. |
6662521e |
175 | |
176 | =cut |
177 | */ |
178 | |
8e84507e |
179 | bool |
6662521e |
180 | Perl_is_utf8_string(pTHX_ U8 *s, STRLEN len) |
181 | { |
067a85ef |
182 | U8* x = s; |
1aa99e6b |
183 | U8* send; |
067a85ef |
184 | STRLEN c; |
185 | |
1aa99e6b |
186 | if (!len) |
6cd5fe39 |
187 | len = strlen((char *)s); |
1aa99e6b |
188 | send = s + len; |
189 | |
6662521e |
190 | while (x < send) { |
191 | c = is_utf8_char(x); |
067a85ef |
192 | if (!c) |
193 | return FALSE; |
6662521e |
194 | x += c; |
6662521e |
195 | } |
60006e79 |
196 | if (x != send) |
197 | return FALSE; |
067a85ef |
198 | |
199 | return TRUE; |
6662521e |
200 | } |
201 | |
67e989fb |
202 | /* |
eebe1485 |
203 | =for apidoc A|U8* s|utf8_to_uv|STRLEN curlen|STRLEN *retlen|U32 flags |
67e989fb |
204 | |
205 | Returns the character value of the first character in the string C<s> |
ba210ebe |
206 | which is assumed to be in UTF8 encoding and no longer than C<curlen>; |
7df053ec |
207 | C<retlen> will be set to the length, in bytes, of that character. |
67e989fb |
208 | |
209 | If C<s> does not point to a well-formed UTF8 character, the behaviour |
dcad2880 |
210 | is dependent on the value of C<flags>: if it contains UTF8_CHECK_ONLY, |
211 | it is assumed that the caller will raise a warning, and this function |
28d3d195 |
212 | will silently just set C<retlen> to C<-1> and return zero. If the |
213 | C<flags> does not contain UTF8_CHECK_ONLY, warnings about |
214 | malformations will be given, C<retlen> will be set to the expected |
215 | length of the UTF-8 character in bytes, and zero will be returned. |
216 | |
217 | The C<flags> can also contain various flags to allow deviations from |
218 | the strict UTF-8 encoding (see F<utf8.h>). |
67e989fb |
219 | |
dcad2880 |
220 | =cut */ |
67e989fb |
221 | |
a0ed51b3 |
222 | UV |
dcad2880 |
223 | Perl_utf8_to_uv(pTHX_ U8* s, STRLEN curlen, STRLEN* retlen, U32 flags) |
a0ed51b3 |
224 | { |
ba210ebe |
225 | UV uv = *s, ouv; |
226 | STRLEN len = 1; |
7bf1b6bb |
227 | #ifdef EBCDIC |
228 | bool dowarn = 0; |
229 | #else |
ba210ebe |
230 | bool dowarn = ckWARN_d(WARN_UTF8); |
7bf1b6bb |
231 | #endif |
ba210ebe |
232 | STRLEN expectlen = 0; |
a0dbb045 |
233 | U32 warning = 0; |
234 | |
235 | /* This list is a superset of the UTF8_ALLOW_XXX. */ |
236 | |
237 | #define UTF8_WARN_EMPTY 1 |
238 | #define UTF8_WARN_CONTINUATION 2 |
239 | #define UTF8_WARN_NON_CONTINUATION 3 |
240 | #define UTF8_WARN_FE_FF 4 |
241 | #define UTF8_WARN_SHORT 5 |
242 | #define UTF8_WARN_OVERFLOW 6 |
243 | #define UTF8_WARN_SURROGATE 7 |
244 | #define UTF8_WARN_BOM 8 |
245 | #define UTF8_WARN_LONG 9 |
246 | #define UTF8_WARN_FFFF 10 |
247 | |
248 | if (curlen == 0 && |
249 | !(flags & UTF8_ALLOW_EMPTY)) { |
250 | warning = UTF8_WARN_EMPTY; |
0c443dc2 |
251 | goto malformed; |
252 | } |
253 | |
421a8bf2 |
254 | if (UTF8_IS_ASCII(uv)) { |
a0ed51b3 |
255 | if (retlen) |
256 | *retlen = 1; |
257 | return *s; |
258 | } |
67e989fb |
259 | |
421a8bf2 |
260 | if (UTF8_IS_CONTINUATION(uv) && |
fcc8fcf6 |
261 | !(flags & UTF8_ALLOW_CONTINUATION)) { |
a0dbb045 |
262 | warning = UTF8_WARN_CONTINUATION; |
ba210ebe |
263 | goto malformed; |
264 | } |
265 | |
421a8bf2 |
266 | if (UTF8_IS_START(uv) && curlen > 1 && !UTF8_IS_CONTINUATION(s[1]) && |
fcc8fcf6 |
267 | !(flags & UTF8_ALLOW_NON_CONTINUATION)) { |
a0dbb045 |
268 | warning = UTF8_WARN_NON_CONTINUATION; |
ba210ebe |
269 | goto malformed; |
270 | } |
fcc8fcf6 |
271 | |
272 | if ((uv == 0xfe || uv == 0xff) && |
273 | !(flags & UTF8_ALLOW_FE_FF)) { |
a0dbb045 |
274 | warning = UTF8_WARN_FE_FF; |
ba210ebe |
275 | goto malformed; |
a0ed51b3 |
276 | } |
fcc8fcf6 |
277 | |
ba210ebe |
278 | if (!(uv & 0x20)) { len = 2; uv &= 0x1f; } |
279 | else if (!(uv & 0x10)) { len = 3; uv &= 0x0f; } |
280 | else if (!(uv & 0x08)) { len = 4; uv &= 0x07; } |
281 | else if (!(uv & 0x04)) { len = 5; uv &= 0x03; } |
282 | else if (!(uv & 0x02)) { len = 6; uv &= 0x01; } |
283 | else if (!(uv & 0x01)) { len = 7; uv = 0; } |
3c77ea2b |
284 | else { len = 13; uv = 0; } /* whoa! */ |
fcc8fcf6 |
285 | |
a0ed51b3 |
286 | if (retlen) |
287 | *retlen = len; |
ba210ebe |
288 | |
289 | expectlen = len; |
290 | |
fcc8fcf6 |
291 | if ((curlen < expectlen) && |
292 | !(flags & UTF8_ALLOW_SHORT)) { |
a0dbb045 |
293 | warning = UTF8_WARN_SHORT; |
ba210ebe |
294 | goto malformed; |
295 | } |
296 | |
297 | len--; |
a0ed51b3 |
298 | s++; |
ba210ebe |
299 | ouv = uv; |
300 | |
a0ed51b3 |
301 | while (len--) { |
421a8bf2 |
302 | if (!UTF8_IS_CONTINUATION(*s) && |
303 | !(flags & UTF8_ALLOW_NON_CONTINUATION)) { |
a0dbb045 |
304 | s--; |
305 | warning = UTF8_WARN_NON_CONTINUATION; |
ba210ebe |
306 | goto malformed; |
a0ed51b3 |
307 | } |
308 | else |
8850bf83 |
309 | uv = UTF8_ACCUMULATE(uv, *s); |
a0dbb045 |
310 | if (!(uv > ouv)) { |
311 | /* These cannot be allowed. */ |
312 | if (uv == ouv) { |
313 | if (!(flags & UTF8_ALLOW_LONG)) { |
314 | warning = UTF8_WARN_LONG; |
315 | goto malformed; |
316 | } |
317 | } |
318 | else { /* uv < ouv */ |
319 | /* This cannot be allowed. */ |
320 | warning = UTF8_WARN_OVERFLOW; |
321 | goto malformed; |
322 | } |
ba210ebe |
323 | } |
324 | s++; |
325 | ouv = uv; |
326 | } |
327 | |
421a8bf2 |
328 | if (UNICODE_IS_SURROGATE(uv) && |
fcc8fcf6 |
329 | !(flags & UTF8_ALLOW_SURROGATE)) { |
a0dbb045 |
330 | warning = UTF8_WARN_SURROGATE; |
ba210ebe |
331 | goto malformed; |
421a8bf2 |
332 | } else if (UNICODE_IS_BYTE_ORDER_MARK(uv) && |
fcc8fcf6 |
333 | !(flags & UTF8_ALLOW_BOM)) { |
a0dbb045 |
334 | warning = UTF8_WARN_BOM; |
ba210ebe |
335 | goto malformed; |
fcc8fcf6 |
336 | } else if ((expectlen > UNISKIP(uv)) && |
337 | !(flags & UTF8_ALLOW_LONG)) { |
a0dbb045 |
338 | warning = UTF8_WARN_LONG; |
ba210ebe |
339 | goto malformed; |
421a8bf2 |
340 | } else if (UNICODE_IS_ILLEGAL(uv) && |
a9917092 |
341 | !(flags & UTF8_ALLOW_FFFF)) { |
a0dbb045 |
342 | warning = UTF8_WARN_FFFF; |
a9917092 |
343 | goto malformed; |
a0ed51b3 |
344 | } |
ba210ebe |
345 | |
a0ed51b3 |
346 | return uv; |
ba210ebe |
347 | |
348 | malformed: |
349 | |
fcc8fcf6 |
350 | if (flags & UTF8_CHECK_ONLY) { |
ba210ebe |
351 | if (retlen) |
cc366d4b |
352 | *retlen = -1; |
ba210ebe |
353 | return 0; |
354 | } |
355 | |
a0dbb045 |
356 | if (dowarn) { |
357 | SV* sv = sv_2mortal(newSVpv("Malformed UTF-8 character ", 0)); |
358 | |
359 | switch (warning) { |
360 | case 0: /* Intentionally empty. */ break; |
361 | case UTF8_WARN_EMPTY: |
362 | Perl_sv_catpvf(aTHX_ sv, "(empty string)"); |
363 | break; |
364 | case UTF8_WARN_CONTINUATION: |
365 | Perl_sv_catpvf(aTHX_ sv, "(unexpected continuation byte 0x%02"UVxf")", uv); |
366 | break; |
367 | case UTF8_WARN_NON_CONTINUATION: |
368 | Perl_sv_catpvf(aTHX_ sv, "(unexpected non-continuation byte 0x%02"UVxf" after start byte 0x%02"UVxf")", |
369 | (UV)s[1], uv); |
370 | break; |
371 | case UTF8_WARN_FE_FF: |
372 | Perl_sv_catpvf(aTHX_ sv, "(byte 0x%02"UVxf")", uv); |
373 | break; |
374 | case UTF8_WARN_SHORT: |
375 | Perl_sv_catpvf(aTHX_ sv, "(%d byte%s, need %d)", |
376 | curlen, curlen == 1 ? "" : "s", expectlen); |
377 | break; |
378 | case UTF8_WARN_OVERFLOW: |
379 | Perl_sv_catpvf(aTHX_ sv, "(overflow at 0x%"UVxf", byte 0x%02x)", |
380 | ouv, *s); |
381 | break; |
382 | case UTF8_WARN_SURROGATE: |
383 | Perl_sv_catpvf(aTHX_ sv, "(UTF-16 surrogate 0x%04"UVxf")", uv); |
384 | break; |
385 | case UTF8_WARN_BOM: |
386 | Perl_sv_catpvf(aTHX_ sv, "(byte order mark 0x%04"UVxf")", uv); |
387 | break; |
388 | case UTF8_WARN_LONG: |
389 | Perl_sv_catpvf(aTHX_ sv, "(%d byte%s, need %d)", |
390 | expectlen, expectlen == 1 ? "": "s", UNISKIP(uv)); |
391 | break; |
392 | case UTF8_WARN_FFFF: |
393 | Perl_sv_catpvf(aTHX_ sv, "(character 0x%04"UVxf")", uv); |
394 | break; |
395 | default: |
396 | Perl_sv_catpvf(aTHX_ sv, "(unknown reason)"); |
397 | break; |
398 | } |
399 | |
400 | if (warning) { |
401 | char *s = SvPVX(sv); |
402 | |
403 | if (PL_op) |
404 | Perl_warner(aTHX_ WARN_UTF8, |
405 | "%s in %s", s, PL_op_desc[PL_op->op_type]); |
406 | else |
407 | Perl_warner(aTHX_ WARN_UTF8, "%s", s); |
408 | } |
409 | } |
410 | |
ba210ebe |
411 | if (retlen) |
28d3d195 |
412 | *retlen = expectlen ? expectlen : len; |
ba210ebe |
413 | |
28d3d195 |
414 | return 0; |
a0ed51b3 |
415 | } |
416 | |
8e84507e |
417 | /* |
eebe1485 |
418 | =for apidoc A|U8* s|utf8_to_uv_simple|STRLEN *retlen |
8e84507e |
419 | |
420 | Returns the character value of the first character in the string C<s> |
421 | which is assumed to be in UTF8 encoding; C<retlen> will be set to the |
7df053ec |
422 | length, in bytes, of that character. |
8e84507e |
423 | |
ba210ebe |
424 | If C<s> does not point to a well-formed UTF8 character, zero is |
425 | returned and retlen is set, if possible, to -1. |
8e84507e |
426 | |
427 | =cut |
428 | */ |
429 | |
430 | UV |
dcad2880 |
431 | Perl_utf8_to_uv_simple(pTHX_ U8* s, STRLEN* retlen) |
8e84507e |
432 | { |
2e4dc9fc |
433 | return Perl_utf8_to_uv(aTHX_ s, UTF8_MAXLEN, retlen, 0); |
8e84507e |
434 | } |
435 | |
b76347f2 |
436 | /* |
eebe1485 |
437 | =for apidoc A|STRLEN|utf8_length|U8* s|U8 *e |
b76347f2 |
438 | |
439 | Return the length of the UTF-8 char encoded string C<s> in characters. |
02eb7b47 |
440 | Stops at C<e> (inclusive). If C<e E<lt> s> or if the scan would end |
441 | up past C<e>, croaks. |
b76347f2 |
442 | |
443 | =cut |
444 | */ |
445 | |
446 | STRLEN |
447 | Perl_utf8_length(pTHX_ U8* s, U8* e) |
448 | { |
449 | STRLEN len = 0; |
450 | |
8850bf83 |
451 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g. |
452 | * the bitops (especially ~) can create illegal UTF-8. |
453 | * In other words: in Perl UTF-8 is not just for Unicode. */ |
454 | |
b76347f2 |
455 | if (e < s) |
02eb7b47 |
456 | Perl_croak(aTHX_ "panic: utf8_length: unexpected end"); |
b76347f2 |
457 | while (s < e) { |
02eb7b47 |
458 | U8 t = UTF8SKIP(s); |
b76347f2 |
459 | |
460 | if (e - s < t) |
02eb7b47 |
461 | Perl_croak(aTHX_ "panic: utf8_length: unaligned end"); |
b76347f2 |
462 | s += t; |
463 | len++; |
464 | } |
465 | |
466 | return len; |
467 | } |
468 | |
b06226ff |
469 | /* |
eebe1485 |
470 | =for apidoc A|IV|utf8_distance|U8 *a|U8 *b |
b06226ff |
471 | |
472 | Returns the number of UTF8 characters between the UTF-8 pointers C<a> |
473 | and C<b>. |
474 | |
475 | WARNING: use only if you *know* that the pointers point inside the |
476 | same UTF-8 buffer. |
477 | |
478 | =cut */ |
a0ed51b3 |
479 | |
02eb7b47 |
480 | IV |
864dbfa3 |
481 | Perl_utf8_distance(pTHX_ U8 *a, U8 *b) |
a0ed51b3 |
482 | { |
02eb7b47 |
483 | IV off = 0; |
484 | |
8850bf83 |
485 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g. |
486 | * the bitops (especially ~) can create illegal UTF-8. |
487 | * In other words: in Perl UTF-8 is not just for Unicode. */ |
488 | |
a0ed51b3 |
489 | if (a < b) { |
490 | while (a < b) { |
02eb7b47 |
491 | U8 c = UTF8SKIP(a); |
492 | |
493 | if (b - a < c) |
494 | Perl_croak(aTHX_ "panic: utf8_distance: unaligned end"); |
495 | a += c; |
a0ed51b3 |
496 | off--; |
497 | } |
498 | } |
499 | else { |
500 | while (b < a) { |
02eb7b47 |
501 | U8 c = UTF8SKIP(b); |
502 | |
503 | if (a - b < c) |
504 | Perl_croak(aTHX_ "panic: utf8_distance: unaligned end"); |
505 | b += c; |
a0ed51b3 |
506 | off++; |
507 | } |
508 | } |
02eb7b47 |
509 | |
a0ed51b3 |
510 | return off; |
511 | } |
512 | |
b06226ff |
513 | /* |
eebe1485 |
514 | =for apidoc A|U8*|utf8_hop|U8 *s|I32 off |
b06226ff |
515 | |
8850bf83 |
516 | Return the UTF-8 pointer C<s> displaced by C<off> characters, either |
517 | forward or backward. |
b06226ff |
518 | |
519 | WARNING: do not use the following unless you *know* C<off> is within |
8850bf83 |
520 | the UTF-8 data pointed to by C<s> *and* that on entry C<s> is aligned |
521 | on the first byte of character or just after the last byte of a character. |
b06226ff |
522 | |
523 | =cut */ |
a0ed51b3 |
524 | |
525 | U8 * |
864dbfa3 |
526 | Perl_utf8_hop(pTHX_ U8 *s, I32 off) |
a0ed51b3 |
527 | { |
8850bf83 |
528 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g |
529 | * the bitops (especially ~) can create illegal UTF-8. |
530 | * In other words: in Perl UTF-8 is not just for Unicode. */ |
531 | |
a0ed51b3 |
532 | if (off >= 0) { |
533 | while (off--) |
534 | s += UTF8SKIP(s); |
535 | } |
536 | else { |
537 | while (off++) { |
538 | s--; |
8850bf83 |
539 | while (UTF8_IS_CONTINUATION(*s)) |
540 | s--; |
a0ed51b3 |
541 | } |
542 | } |
543 | return s; |
544 | } |
545 | |
6940069f |
546 | /* |
eebe1485 |
547 | =for apidoc A|U8 *|utf8_to_bytes|U8 *s|STRLEN *len |
6940069f |
548 | |
246fae53 |
549 | Converts a string C<s> of length C<len> from UTF8 into byte encoding. |
550 | Unlike C<bytes_to_utf8>, this over-writes the original string, and |
551 | updates len to contain the new length. |
67e989fb |
552 | Returns zero on failure, setting C<len> to -1. |
6940069f |
553 | |
554 | =cut |
555 | */ |
556 | |
557 | U8 * |
246fae53 |
558 | Perl_utf8_to_bytes(pTHX_ U8* s, STRLEN *len) |
6940069f |
559 | { |
6940069f |
560 | U8 *send; |
561 | U8 *d; |
dcad2880 |
562 | U8 *save = s; |
246fae53 |
563 | |
564 | /* ensure valid UTF8 and chars < 256 before updating string */ |
dcad2880 |
565 | for (send = s + *len; s < send; ) { |
566 | U8 c = *s++; |
567 | |
9f9ab905 |
568 | if (c >= 0x80 && |
dcad2880 |
569 | ((s >= send) || |
570 | ((*s++ & 0xc0) != 0x80) || ((c & 0xfe) != 0xc2))) { |
571 | *len = -1; |
572 | return 0; |
573 | } |
246fae53 |
574 | } |
dcad2880 |
575 | |
576 | d = s = save; |
6940069f |
577 | while (s < send) { |
ed646e6e |
578 | STRLEN ulen; |
579 | *d++ = (U8)utf8_to_uv_simple(s, &ulen); |
580 | s += ulen; |
6940069f |
581 | } |
582 | *d = '\0'; |
246fae53 |
583 | *len = d - save; |
6940069f |
584 | return save; |
585 | } |
586 | |
587 | /* |
f9a63242 |
588 | =for apidoc A|U8 *|bytes_from_utf8|U8 *s|STRLEN *len|bool *is_utf8 |
589 | |
590 | Converts a string C<s> of length C<len> from UTF8 into byte encoding. |
591 | Unlike <utf8_to_bytes> but like C<bytes_to_utf8>, returns a pointer to |
ef9edfd0 |
592 | the newly-created string, and updates C<len> to contain the new |
593 | length. Returns the original string if no conversion occurs, C<len> |
594 | is unchanged. Do nothing if C<is_utf8> points to 0. Sets C<is_utf8> to |
595 | 0 if C<s> is converted or contains all 7bit characters. |
f9a63242 |
596 | |
597 | =cut */ |
598 | |
599 | U8 * |
600 | Perl_bytes_from_utf8(pTHX_ U8* s, STRLEN *len, bool *is_utf8) |
601 | { |
602 | U8 *send; |
603 | U8 *d; |
604 | U8 *start = s; |
605 | I32 count = 0; |
606 | |
607 | if (!*is_utf8) |
608 | return start; |
609 | |
ef9edfd0 |
610 | /* ensure valid UTF8 and chars < 256 before converting string */ |
f9a63242 |
611 | for (send = s + *len; s < send;) { |
612 | U8 c = *s++; |
613 | if (!UTF8_IS_ASCII(c)) { |
614 | if (UTF8_IS_CONTINUATION(c) || s >= send || |
df84a23b |
615 | !UTF8_IS_CONTINUATION(*s) || UTF8_IS_DOWNGRADEABLE_START(c)) |
f9a63242 |
616 | return start; |
617 | s++, count++; |
618 | } |
619 | } |
620 | |
621 | *is_utf8 = 0; |
622 | |
623 | if (!count) |
624 | return start; |
625 | |
626 | Newz(801, d, (*len) - count + 1, U8); |
ef9edfd0 |
627 | s = start; start = d; |
f9a63242 |
628 | while (s < send) { |
629 | U8 c = *s++; |
90f44359 |
630 | |
f9a63242 |
631 | if (UTF8_IS_ASCII(c)) |
632 | *d++ = c; |
633 | else |
90f44359 |
634 | *d++ = UTF8_ACCUMULATE(c, *s++); |
f9a63242 |
635 | } |
636 | *d = '\0'; |
637 | *len = d - start; |
638 | return start; |
639 | } |
640 | |
641 | /* |
eebe1485 |
642 | =for apidoc A|U8 *|bytes_to_utf8|U8 *s|STRLEN *len |
6940069f |
643 | |
644 | Converts a string C<s> of length C<len> from ASCII into UTF8 encoding. |
6662521e |
645 | Returns a pointer to the newly-created string, and sets C<len> to |
646 | reflect the new length. |
6940069f |
647 | |
497711e7 |
648 | =cut |
6940069f |
649 | */ |
650 | |
651 | U8* |
6662521e |
652 | Perl_bytes_to_utf8(pTHX_ U8* s, STRLEN *len) |
6940069f |
653 | { |
6940069f |
654 | U8 *send; |
655 | U8 *d; |
656 | U8 *dst; |
6662521e |
657 | send = s + (*len); |
6940069f |
658 | |
6662521e |
659 | Newz(801, d, (*len) * 2 + 1, U8); |
6940069f |
660 | dst = d; |
661 | |
662 | while (s < send) { |
90f44359 |
663 | if (UTF8_IS_ASCII(*s)) |
6940069f |
664 | *d++ = *s++; |
665 | else { |
666 | UV uv = *s++; |
90f44359 |
667 | |
668 | *d++ = UTF8_EIGHT_BIT_HI(uv); |
669 | *d++ = UTF8_EIGHT_BIT_LO(uv); |
6940069f |
670 | } |
671 | } |
672 | *d = '\0'; |
6662521e |
673 | *len = d-dst; |
6940069f |
674 | return dst; |
675 | } |
676 | |
a0ed51b3 |
677 | /* |
dea0fc0b |
678 | * Convert native (big-endian) or reversed (little-endian) UTF-16 to UTF-8. |
a0ed51b3 |
679 | * |
680 | * Destination must be pre-extended to 3/2 source. Do not use in-place. |
681 | * We optimize for native, for obvious reasons. */ |
682 | |
683 | U8* |
dea0fc0b |
684 | Perl_utf16_to_utf8(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 |
685 | { |
dea0fc0b |
686 | U8* pend; |
687 | U8* dstart = d; |
688 | |
689 | if (bytelen & 1) |
a7867d0a |
690 | Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen"); |
dea0fc0b |
691 | |
692 | pend = p + bytelen; |
693 | |
a0ed51b3 |
694 | while (p < pend) { |
dea0fc0b |
695 | UV uv = (p[0] << 8) + p[1]; /* UTF-16BE */ |
696 | p += 2; |
a0ed51b3 |
697 | if (uv < 0x80) { |
698 | *d++ = uv; |
699 | continue; |
700 | } |
701 | if (uv < 0x800) { |
702 | *d++ = (( uv >> 6) | 0xc0); |
703 | *d++ = (( uv & 0x3f) | 0x80); |
704 | continue; |
705 | } |
706 | if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */ |
dea0fc0b |
707 | UV low = *p++; |
708 | if (low < 0xdc00 || low >= 0xdfff) |
709 | Perl_croak(aTHX_ "Malformed UTF-16 surrogate"); |
a0ed51b3 |
710 | uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000; |
711 | } |
712 | if (uv < 0x10000) { |
713 | *d++ = (( uv >> 12) | 0xe0); |
714 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
715 | *d++ = (( uv & 0x3f) | 0x80); |
716 | continue; |
717 | } |
718 | else { |
719 | *d++ = (( uv >> 18) | 0xf0); |
720 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
721 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
722 | *d++ = (( uv & 0x3f) | 0x80); |
723 | continue; |
724 | } |
725 | } |
dea0fc0b |
726 | *newlen = d - dstart; |
a0ed51b3 |
727 | return d; |
728 | } |
729 | |
730 | /* Note: this one is slightly destructive of the source. */ |
731 | |
732 | U8* |
dea0fc0b |
733 | Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 |
734 | { |
735 | U8* s = (U8*)p; |
736 | U8* send = s + bytelen; |
737 | while (s < send) { |
738 | U8 tmp = s[0]; |
739 | s[0] = s[1]; |
740 | s[1] = tmp; |
741 | s += 2; |
742 | } |
dea0fc0b |
743 | return utf16_to_utf8(p, d, bytelen, newlen); |
a0ed51b3 |
744 | } |
745 | |
746 | /* for now these are all defined (inefficiently) in terms of the utf8 versions */ |
747 | |
748 | bool |
864dbfa3 |
749 | Perl_is_uni_alnum(pTHX_ U32 c) |
a0ed51b3 |
750 | { |
ad391ad9 |
751 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
752 | uv_to_utf8(tmpbuf, (UV)c); |
753 | return is_utf8_alnum(tmpbuf); |
754 | } |
755 | |
756 | bool |
b8c5462f |
757 | Perl_is_uni_alnumc(pTHX_ U32 c) |
758 | { |
ad391ad9 |
759 | U8 tmpbuf[UTF8_MAXLEN+1]; |
b8c5462f |
760 | uv_to_utf8(tmpbuf, (UV)c); |
761 | return is_utf8_alnumc(tmpbuf); |
762 | } |
763 | |
764 | bool |
864dbfa3 |
765 | Perl_is_uni_idfirst(pTHX_ U32 c) |
a0ed51b3 |
766 | { |
ad391ad9 |
767 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
768 | uv_to_utf8(tmpbuf, (UV)c); |
769 | return is_utf8_idfirst(tmpbuf); |
770 | } |
771 | |
772 | bool |
864dbfa3 |
773 | Perl_is_uni_alpha(pTHX_ U32 c) |
a0ed51b3 |
774 | { |
ad391ad9 |
775 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
776 | uv_to_utf8(tmpbuf, (UV)c); |
777 | return is_utf8_alpha(tmpbuf); |
778 | } |
779 | |
780 | bool |
4d61ec05 |
781 | Perl_is_uni_ascii(pTHX_ U32 c) |
782 | { |
ad391ad9 |
783 | U8 tmpbuf[UTF8_MAXLEN+1]; |
4d61ec05 |
784 | uv_to_utf8(tmpbuf, (UV)c); |
785 | return is_utf8_ascii(tmpbuf); |
786 | } |
787 | |
788 | bool |
864dbfa3 |
789 | Perl_is_uni_space(pTHX_ U32 c) |
a0ed51b3 |
790 | { |
ad391ad9 |
791 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
792 | uv_to_utf8(tmpbuf, (UV)c); |
793 | return is_utf8_space(tmpbuf); |
794 | } |
795 | |
796 | bool |
864dbfa3 |
797 | Perl_is_uni_digit(pTHX_ U32 c) |
a0ed51b3 |
798 | { |
ad391ad9 |
799 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
800 | uv_to_utf8(tmpbuf, (UV)c); |
801 | return is_utf8_digit(tmpbuf); |
802 | } |
803 | |
804 | bool |
864dbfa3 |
805 | Perl_is_uni_upper(pTHX_ U32 c) |
a0ed51b3 |
806 | { |
ad391ad9 |
807 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
808 | uv_to_utf8(tmpbuf, (UV)c); |
809 | return is_utf8_upper(tmpbuf); |
810 | } |
811 | |
812 | bool |
864dbfa3 |
813 | Perl_is_uni_lower(pTHX_ U32 c) |
a0ed51b3 |
814 | { |
ad391ad9 |
815 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
816 | uv_to_utf8(tmpbuf, (UV)c); |
817 | return is_utf8_lower(tmpbuf); |
818 | } |
819 | |
820 | bool |
b8c5462f |
821 | Perl_is_uni_cntrl(pTHX_ U32 c) |
822 | { |
ad391ad9 |
823 | U8 tmpbuf[UTF8_MAXLEN+1]; |
b8c5462f |
824 | uv_to_utf8(tmpbuf, (UV)c); |
825 | return is_utf8_cntrl(tmpbuf); |
826 | } |
827 | |
828 | bool |
829 | Perl_is_uni_graph(pTHX_ U32 c) |
830 | { |
ad391ad9 |
831 | U8 tmpbuf[UTF8_MAXLEN+1]; |
b8c5462f |
832 | uv_to_utf8(tmpbuf, (UV)c); |
833 | return is_utf8_graph(tmpbuf); |
834 | } |
835 | |
836 | bool |
864dbfa3 |
837 | Perl_is_uni_print(pTHX_ U32 c) |
a0ed51b3 |
838 | { |
ad391ad9 |
839 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
840 | uv_to_utf8(tmpbuf, (UV)c); |
841 | return is_utf8_print(tmpbuf); |
842 | } |
843 | |
b8c5462f |
844 | bool |
f248d071 |
845 | Perl_is_uni_punct(pTHX_ U32 c) |
b8c5462f |
846 | { |
ad391ad9 |
847 | U8 tmpbuf[UTF8_MAXLEN+1]; |
b8c5462f |
848 | uv_to_utf8(tmpbuf, (UV)c); |
849 | return is_utf8_punct(tmpbuf); |
850 | } |
851 | |
4d61ec05 |
852 | bool |
853 | Perl_is_uni_xdigit(pTHX_ U32 c) |
854 | { |
ad391ad9 |
855 | U8 tmpbuf[UTF8_MAXLEN+1]; |
4d61ec05 |
856 | uv_to_utf8(tmpbuf, (UV)c); |
857 | return is_utf8_xdigit(tmpbuf); |
858 | } |
859 | |
a0ed51b3 |
860 | U32 |
864dbfa3 |
861 | Perl_to_uni_upper(pTHX_ U32 c) |
a0ed51b3 |
862 | { |
ad391ad9 |
863 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
864 | uv_to_utf8(tmpbuf, (UV)c); |
865 | return to_utf8_upper(tmpbuf); |
866 | } |
867 | |
868 | U32 |
864dbfa3 |
869 | Perl_to_uni_title(pTHX_ U32 c) |
a0ed51b3 |
870 | { |
ad391ad9 |
871 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
872 | uv_to_utf8(tmpbuf, (UV)c); |
873 | return to_utf8_title(tmpbuf); |
874 | } |
875 | |
876 | U32 |
864dbfa3 |
877 | Perl_to_uni_lower(pTHX_ U32 c) |
a0ed51b3 |
878 | { |
ad391ad9 |
879 | U8 tmpbuf[UTF8_MAXLEN+1]; |
a0ed51b3 |
880 | uv_to_utf8(tmpbuf, (UV)c); |
881 | return to_utf8_lower(tmpbuf); |
882 | } |
883 | |
884 | /* for now these all assume no locale info available for Unicode > 255 */ |
885 | |
886 | bool |
864dbfa3 |
887 | Perl_is_uni_alnum_lc(pTHX_ U32 c) |
a0ed51b3 |
888 | { |
889 | return is_uni_alnum(c); /* XXX no locale support yet */ |
890 | } |
891 | |
892 | bool |
b8c5462f |
893 | Perl_is_uni_alnumc_lc(pTHX_ U32 c) |
894 | { |
895 | return is_uni_alnumc(c); /* XXX no locale support yet */ |
896 | } |
897 | |
898 | bool |
864dbfa3 |
899 | Perl_is_uni_idfirst_lc(pTHX_ U32 c) |
a0ed51b3 |
900 | { |
901 | return is_uni_idfirst(c); /* XXX no locale support yet */ |
902 | } |
903 | |
904 | bool |
864dbfa3 |
905 | Perl_is_uni_alpha_lc(pTHX_ U32 c) |
a0ed51b3 |
906 | { |
907 | return is_uni_alpha(c); /* XXX no locale support yet */ |
908 | } |
909 | |
910 | bool |
4d61ec05 |
911 | Perl_is_uni_ascii_lc(pTHX_ U32 c) |
912 | { |
913 | return is_uni_ascii(c); /* XXX no locale support yet */ |
914 | } |
915 | |
916 | bool |
864dbfa3 |
917 | Perl_is_uni_space_lc(pTHX_ U32 c) |
a0ed51b3 |
918 | { |
919 | return is_uni_space(c); /* XXX no locale support yet */ |
920 | } |
921 | |
922 | bool |
864dbfa3 |
923 | Perl_is_uni_digit_lc(pTHX_ U32 c) |
a0ed51b3 |
924 | { |
925 | return is_uni_digit(c); /* XXX no locale support yet */ |
926 | } |
927 | |
928 | bool |
864dbfa3 |
929 | Perl_is_uni_upper_lc(pTHX_ U32 c) |
a0ed51b3 |
930 | { |
931 | return is_uni_upper(c); /* XXX no locale support yet */ |
932 | } |
933 | |
934 | bool |
864dbfa3 |
935 | Perl_is_uni_lower_lc(pTHX_ U32 c) |
a0ed51b3 |
936 | { |
937 | return is_uni_lower(c); /* XXX no locale support yet */ |
938 | } |
939 | |
940 | bool |
b8c5462f |
941 | Perl_is_uni_cntrl_lc(pTHX_ U32 c) |
942 | { |
943 | return is_uni_cntrl(c); /* XXX no locale support yet */ |
944 | } |
945 | |
946 | bool |
947 | Perl_is_uni_graph_lc(pTHX_ U32 c) |
948 | { |
949 | return is_uni_graph(c); /* XXX no locale support yet */ |
950 | } |
951 | |
952 | bool |
864dbfa3 |
953 | Perl_is_uni_print_lc(pTHX_ U32 c) |
a0ed51b3 |
954 | { |
955 | return is_uni_print(c); /* XXX no locale support yet */ |
956 | } |
957 | |
b8c5462f |
958 | bool |
959 | Perl_is_uni_punct_lc(pTHX_ U32 c) |
960 | { |
961 | return is_uni_punct(c); /* XXX no locale support yet */ |
962 | } |
963 | |
4d61ec05 |
964 | bool |
965 | Perl_is_uni_xdigit_lc(pTHX_ U32 c) |
966 | { |
967 | return is_uni_xdigit(c); /* XXX no locale support yet */ |
968 | } |
969 | |
a0ed51b3 |
970 | U32 |
864dbfa3 |
971 | Perl_to_uni_upper_lc(pTHX_ U32 c) |
a0ed51b3 |
972 | { |
973 | return to_uni_upper(c); /* XXX no locale support yet */ |
974 | } |
975 | |
976 | U32 |
864dbfa3 |
977 | Perl_to_uni_title_lc(pTHX_ U32 c) |
a0ed51b3 |
978 | { |
979 | return to_uni_title(c); /* XXX no locale support yet */ |
980 | } |
981 | |
982 | U32 |
864dbfa3 |
983 | Perl_to_uni_lower_lc(pTHX_ U32 c) |
a0ed51b3 |
984 | { |
985 | return to_uni_lower(c); /* XXX no locale support yet */ |
986 | } |
987 | |
a0ed51b3 |
988 | bool |
864dbfa3 |
989 | Perl_is_utf8_alnum(pTHX_ U8 *p) |
a0ed51b3 |
990 | { |
386d01d6 |
991 | if (!is_utf8_char(p)) |
992 | return FALSE; |
a0ed51b3 |
993 | if (!PL_utf8_alnum) |
289d4f09 |
994 | /* NOTE: "IsWord", not "IsAlnum", since Alnum is a true |
995 | * descendant of isalnum(3), in other words, it doesn't |
996 | * contain the '_'. --jhi */ |
997 | PL_utf8_alnum = swash_init("utf8", "IsWord", &PL_sv_undef, 0, 0); |
a0ed51b3 |
998 | return swash_fetch(PL_utf8_alnum, p); |
999 | /* return *p == '_' || is_utf8_alpha(p) || is_utf8_digit(p); */ |
1000 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ |
1001 | if (!PL_utf8_alnum) |
1002 | PL_utf8_alnum = swash_init("utf8", "", |
1003 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); |
1004 | return swash_fetch(PL_utf8_alnum, p); |
1005 | #endif |
1006 | } |
1007 | |
1008 | bool |
b8c5462f |
1009 | Perl_is_utf8_alnumc(pTHX_ U8 *p) |
1010 | { |
386d01d6 |
1011 | if (!is_utf8_char(p)) |
1012 | return FALSE; |
b8c5462f |
1013 | if (!PL_utf8_alnum) |
1014 | PL_utf8_alnum = swash_init("utf8", "IsAlnumC", &PL_sv_undef, 0, 0); |
1015 | return swash_fetch(PL_utf8_alnum, p); |
1016 | /* return is_utf8_alpha(p) || is_utf8_digit(p); */ |
1017 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ |
1018 | if (!PL_utf8_alnum) |
1019 | PL_utf8_alnum = swash_init("utf8", "", |
1020 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); |
1021 | return swash_fetch(PL_utf8_alnum, p); |
1022 | #endif |
1023 | } |
1024 | |
1025 | bool |
864dbfa3 |
1026 | Perl_is_utf8_idfirst(pTHX_ U8 *p) |
a0ed51b3 |
1027 | { |
1028 | return *p == '_' || is_utf8_alpha(p); |
1029 | } |
1030 | |
1031 | bool |
864dbfa3 |
1032 | Perl_is_utf8_alpha(pTHX_ U8 *p) |
a0ed51b3 |
1033 | { |
386d01d6 |
1034 | if (!is_utf8_char(p)) |
1035 | return FALSE; |
a0ed51b3 |
1036 | if (!PL_utf8_alpha) |
e24b16f9 |
1037 | PL_utf8_alpha = swash_init("utf8", "IsAlpha", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1038 | return swash_fetch(PL_utf8_alpha, p); |
1039 | } |
1040 | |
1041 | bool |
b8c5462f |
1042 | Perl_is_utf8_ascii(pTHX_ U8 *p) |
1043 | { |
386d01d6 |
1044 | if (!is_utf8_char(p)) |
1045 | return FALSE; |
b8c5462f |
1046 | if (!PL_utf8_ascii) |
1047 | PL_utf8_ascii = swash_init("utf8", "IsAscii", &PL_sv_undef, 0, 0); |
1048 | return swash_fetch(PL_utf8_ascii, p); |
1049 | } |
1050 | |
1051 | bool |
864dbfa3 |
1052 | Perl_is_utf8_space(pTHX_ U8 *p) |
a0ed51b3 |
1053 | { |
386d01d6 |
1054 | if (!is_utf8_char(p)) |
1055 | return FALSE; |
a0ed51b3 |
1056 | if (!PL_utf8_space) |
3bec3564 |
1057 | PL_utf8_space = swash_init("utf8", "IsSpacePerl", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1058 | return swash_fetch(PL_utf8_space, p); |
1059 | } |
1060 | |
1061 | bool |
864dbfa3 |
1062 | Perl_is_utf8_digit(pTHX_ U8 *p) |
a0ed51b3 |
1063 | { |
386d01d6 |
1064 | if (!is_utf8_char(p)) |
1065 | return FALSE; |
a0ed51b3 |
1066 | if (!PL_utf8_digit) |
e24b16f9 |
1067 | PL_utf8_digit = swash_init("utf8", "IsDigit", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1068 | return swash_fetch(PL_utf8_digit, p); |
1069 | } |
1070 | |
1071 | bool |
864dbfa3 |
1072 | Perl_is_utf8_upper(pTHX_ U8 *p) |
a0ed51b3 |
1073 | { |
386d01d6 |
1074 | if (!is_utf8_char(p)) |
1075 | return FALSE; |
a0ed51b3 |
1076 | if (!PL_utf8_upper) |
e24b16f9 |
1077 | PL_utf8_upper = swash_init("utf8", "IsUpper", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1078 | return swash_fetch(PL_utf8_upper, p); |
1079 | } |
1080 | |
1081 | bool |
864dbfa3 |
1082 | Perl_is_utf8_lower(pTHX_ U8 *p) |
a0ed51b3 |
1083 | { |
386d01d6 |
1084 | if (!is_utf8_char(p)) |
1085 | return FALSE; |
a0ed51b3 |
1086 | if (!PL_utf8_lower) |
e24b16f9 |
1087 | PL_utf8_lower = swash_init("utf8", "IsLower", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1088 | return swash_fetch(PL_utf8_lower, p); |
1089 | } |
1090 | |
1091 | bool |
b8c5462f |
1092 | Perl_is_utf8_cntrl(pTHX_ U8 *p) |
1093 | { |
386d01d6 |
1094 | if (!is_utf8_char(p)) |
1095 | return FALSE; |
b8c5462f |
1096 | if (!PL_utf8_cntrl) |
1097 | PL_utf8_cntrl = swash_init("utf8", "IsCntrl", &PL_sv_undef, 0, 0); |
1098 | return swash_fetch(PL_utf8_cntrl, p); |
1099 | } |
1100 | |
1101 | bool |
1102 | Perl_is_utf8_graph(pTHX_ U8 *p) |
1103 | { |
386d01d6 |
1104 | if (!is_utf8_char(p)) |
1105 | return FALSE; |
b8c5462f |
1106 | if (!PL_utf8_graph) |
1107 | PL_utf8_graph = swash_init("utf8", "IsGraph", &PL_sv_undef, 0, 0); |
1108 | return swash_fetch(PL_utf8_graph, p); |
1109 | } |
1110 | |
1111 | bool |
864dbfa3 |
1112 | Perl_is_utf8_print(pTHX_ U8 *p) |
a0ed51b3 |
1113 | { |
386d01d6 |
1114 | if (!is_utf8_char(p)) |
1115 | return FALSE; |
a0ed51b3 |
1116 | if (!PL_utf8_print) |
e24b16f9 |
1117 | PL_utf8_print = swash_init("utf8", "IsPrint", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1118 | return swash_fetch(PL_utf8_print, p); |
1119 | } |
1120 | |
1121 | bool |
b8c5462f |
1122 | Perl_is_utf8_punct(pTHX_ U8 *p) |
1123 | { |
386d01d6 |
1124 | if (!is_utf8_char(p)) |
1125 | return FALSE; |
b8c5462f |
1126 | if (!PL_utf8_punct) |
1127 | PL_utf8_punct = swash_init("utf8", "IsPunct", &PL_sv_undef, 0, 0); |
1128 | return swash_fetch(PL_utf8_punct, p); |
1129 | } |
1130 | |
1131 | bool |
1132 | Perl_is_utf8_xdigit(pTHX_ U8 *p) |
1133 | { |
386d01d6 |
1134 | if (!is_utf8_char(p)) |
1135 | return FALSE; |
b8c5462f |
1136 | if (!PL_utf8_xdigit) |
1137 | PL_utf8_xdigit = swash_init("utf8", "IsXDigit", &PL_sv_undef, 0, 0); |
1138 | return swash_fetch(PL_utf8_xdigit, p); |
1139 | } |
1140 | |
1141 | bool |
864dbfa3 |
1142 | Perl_is_utf8_mark(pTHX_ U8 *p) |
a0ed51b3 |
1143 | { |
386d01d6 |
1144 | if (!is_utf8_char(p)) |
1145 | return FALSE; |
a0ed51b3 |
1146 | if (!PL_utf8_mark) |
e24b16f9 |
1147 | PL_utf8_mark = swash_init("utf8", "IsM", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1148 | return swash_fetch(PL_utf8_mark, p); |
1149 | } |
1150 | |
2104c8d9 |
1151 | UV |
864dbfa3 |
1152 | Perl_to_utf8_upper(pTHX_ U8 *p) |
a0ed51b3 |
1153 | { |
1154 | UV uv; |
1155 | |
1156 | if (!PL_utf8_toupper) |
e24b16f9 |
1157 | PL_utf8_toupper = swash_init("utf8", "ToUpper", &PL_sv_undef, 4, 0); |
a0ed51b3 |
1158 | uv = swash_fetch(PL_utf8_toupper, p); |
756820e3 |
1159 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
a0ed51b3 |
1160 | } |
1161 | |
2104c8d9 |
1162 | UV |
864dbfa3 |
1163 | Perl_to_utf8_title(pTHX_ U8 *p) |
a0ed51b3 |
1164 | { |
1165 | UV uv; |
1166 | |
1167 | if (!PL_utf8_totitle) |
e24b16f9 |
1168 | PL_utf8_totitle = swash_init("utf8", "ToTitle", &PL_sv_undef, 4, 0); |
a0ed51b3 |
1169 | uv = swash_fetch(PL_utf8_totitle, p); |
756820e3 |
1170 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
a0ed51b3 |
1171 | } |
1172 | |
2104c8d9 |
1173 | UV |
864dbfa3 |
1174 | Perl_to_utf8_lower(pTHX_ U8 *p) |
a0ed51b3 |
1175 | { |
1176 | UV uv; |
1177 | |
1178 | if (!PL_utf8_tolower) |
e24b16f9 |
1179 | PL_utf8_tolower = swash_init("utf8", "ToLower", &PL_sv_undef, 4, 0); |
a0ed51b3 |
1180 | uv = swash_fetch(PL_utf8_tolower, p); |
756820e3 |
1181 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
a0ed51b3 |
1182 | } |
1183 | |
1184 | /* a "swash" is a swatch hash */ |
1185 | |
1186 | SV* |
864dbfa3 |
1187 | Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none) |
a0ed51b3 |
1188 | { |
1189 | SV* retval; |
bf1fed83 |
1190 | SV* tokenbufsv = sv_2mortal(NEWSV(0,0)); |
8e84507e |
1191 | dSP; |
ce3b816e |
1192 | |
1193 | if (!gv_stashpv(pkg, 0)) { /* demand load utf8 */ |
1194 | ENTER; |
1195 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpv(pkg,0), Nullsv); |
1196 | LEAVE; |
1197 | } |
1198 | SPAGAIN; |
a0ed51b3 |
1199 | PUSHSTACKi(PERLSI_MAGIC); |
1200 | PUSHMARK(SP); |
1201 | EXTEND(SP,5); |
1202 | PUSHs(sv_2mortal(newSVpvn(pkg, strlen(pkg)))); |
1203 | PUSHs(sv_2mortal(newSVpvn(name, strlen(name)))); |
1204 | PUSHs(listsv); |
1205 | PUSHs(sv_2mortal(newSViv(minbits))); |
1206 | PUSHs(sv_2mortal(newSViv(none))); |
1207 | PUTBACK; |
1208 | ENTER; |
1209 | SAVEI32(PL_hints); |
1210 | PL_hints = 0; |
1211 | save_re_context(); |
bf1fed83 |
1212 | if (PL_curcop == &PL_compiling) |
1213 | /* XXX ought to be handled by lex_start */ |
1214 | sv_setpv(tokenbufsv, PL_tokenbuf); |
864dbfa3 |
1215 | if (call_method("SWASHNEW", G_SCALAR)) |
8e84507e |
1216 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 |
1217 | else |
e24b16f9 |
1218 | retval = &PL_sv_undef; |
a0ed51b3 |
1219 | LEAVE; |
1220 | POPSTACK; |
e24b16f9 |
1221 | if (PL_curcop == &PL_compiling) { |
bf1fed83 |
1222 | STRLEN len; |
1223 | char* pv = SvPV(tokenbufsv, len); |
1224 | |
1225 | Copy(pv, PL_tokenbuf, len+1, char); |
e24b16f9 |
1226 | PL_curcop->op_private = PL_hints; |
a0ed51b3 |
1227 | } |
1228 | if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV) |
cea2e8a9 |
1229 | Perl_croak(aTHX_ "SWASHNEW didn't return an HV ref"); |
a0ed51b3 |
1230 | return retval; |
1231 | } |
1232 | |
1233 | UV |
864dbfa3 |
1234 | Perl_swash_fetch(pTHX_ SV *sv, U8 *ptr) |
a0ed51b3 |
1235 | { |
1236 | HV* hv = (HV*)SvRV(sv); |
1237 | U32 klen = UTF8SKIP(ptr) - 1; |
1238 | U32 off = ptr[klen] & 127; /* NB: 64 bit always 0 when len > 1 */ |
1239 | STRLEN slen; |
1240 | STRLEN needents = (klen ? 64 : 128); |
dfe13c55 |
1241 | U8 *tmps; |
a0ed51b3 |
1242 | U32 bit; |
1243 | SV *retval; |
1244 | |
1245 | /* |
1246 | * This single-entry cache saves about 1/3 of the utf8 overhead in test |
1247 | * suite. (That is, only 7-8% overall over just a hash cache. Still, |
1248 | * it's nothing to sniff at.) Pity we usually come through at least |
1249 | * two function calls to get here... |
1250 | * |
1251 | * NB: this code assumes that swatches are never modified, once generated! |
1252 | */ |
1253 | |
1254 | if (hv == PL_last_swash_hv && |
1255 | klen == PL_last_swash_klen && |
12ae5dfc |
1256 | (!klen || memEQ((char *)ptr,(char *)PL_last_swash_key,klen)) ) |
a0ed51b3 |
1257 | { |
1258 | tmps = PL_last_swash_tmps; |
1259 | slen = PL_last_swash_slen; |
1260 | } |
1261 | else { |
1262 | /* Try our second-level swatch cache, kept in a hash. */ |
dfe13c55 |
1263 | SV** svp = hv_fetch(hv, (char*)ptr, klen, FALSE); |
a0ed51b3 |
1264 | |
1265 | /* If not cached, generate it via utf8::SWASHGET */ |
dfe13c55 |
1266 | if (!svp || !SvPOK(*svp) || !(tmps = (U8*)SvPV(*svp, slen))) { |
a0ed51b3 |
1267 | dSP; |
1268 | ENTER; |
1269 | SAVETMPS; |
1270 | save_re_context(); |
1271 | PUSHSTACKi(PERLSI_MAGIC); |
1272 | PUSHMARK(SP); |
1273 | EXTEND(SP,3); |
1274 | PUSHs((SV*)sv); |
756820e3 |
1275 | PUSHs(sv_2mortal(newSViv(utf8_to_uv(ptr, UTF8_MAXLEN, 0, 0) & ~(needents - 1)))); |
a0ed51b3 |
1276 | PUSHs(sv_2mortal(newSViv(needents))); |
1277 | PUTBACK; |
864dbfa3 |
1278 | if (call_method("SWASHGET", G_SCALAR)) |
8e84507e |
1279 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 |
1280 | else |
e24b16f9 |
1281 | retval = &PL_sv_undef; |
a0ed51b3 |
1282 | POPSTACK; |
1283 | FREETMPS; |
1284 | LEAVE; |
e24b16f9 |
1285 | if (PL_curcop == &PL_compiling) |
1286 | PL_curcop->op_private = PL_hints; |
a0ed51b3 |
1287 | |
dfe13c55 |
1288 | svp = hv_store(hv, (char*)ptr, klen, retval, 0); |
a0ed51b3 |
1289 | |
dfe13c55 |
1290 | if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || slen < 8) |
cea2e8a9 |
1291 | Perl_croak(aTHX_ "SWASHGET didn't return result of proper length"); |
a0ed51b3 |
1292 | } |
1293 | |
1294 | PL_last_swash_hv = hv; |
1295 | PL_last_swash_klen = klen; |
1296 | PL_last_swash_tmps = tmps; |
1297 | PL_last_swash_slen = slen; |
1298 | if (klen) |
1299 | Copy(ptr, PL_last_swash_key, klen, U8); |
1300 | } |
1301 | |
9faf8d75 |
1302 | switch ((int)((slen << 3) / needents)) { |
a0ed51b3 |
1303 | case 1: |
1304 | bit = 1 << (off & 7); |
1305 | off >>= 3; |
1306 | return (tmps[off] & bit) != 0; |
1307 | case 8: |
1308 | return tmps[off]; |
1309 | case 16: |
1310 | off <<= 1; |
1311 | return (tmps[off] << 8) + tmps[off + 1] ; |
1312 | case 32: |
1313 | off <<= 2; |
1314 | return (tmps[off] << 24) + (tmps[off+1] << 16) + (tmps[off+2] << 8) + tmps[off + 3] ; |
1315 | } |
cea2e8a9 |
1316 | Perl_croak(aTHX_ "panic: swash_fetch"); |
a0ed51b3 |
1317 | return 0; |
1318 | } |