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 | /* |
37607a96 |
30 | =for apidoc A|U8 *|uvuni_to_utf8|U8 *d|UV uv |
eebe1485 |
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 |
9041c2e3 |
35 | end of the new character. In other words, |
eebe1485 |
36 | |
9041c2e3 |
37 | d = uvuni_to_utf8(d, uv); |
eebe1485 |
38 | |
39 | is the recommended Unicode-aware way of saying |
40 | |
41 | *(d++) = uv; |
42 | |
43 | =cut |
44 | */ |
45 | |
dfe13c55 |
46 | U8 * |
9041c2e3 |
47 | Perl_uvuni_to_utf8(pTHX_ U8 *d, UV uv) |
a0ed51b3 |
48 | { |
c4d5f83a |
49 | if (UNI_IS_INVARIANT(uv)) { |
50 | *d++ = UTF_TO_NATIVE(uv); |
a0ed51b3 |
51 | return d; |
52 | } |
1d72bdf6 |
53 | #if defined(EBCDIC) || 1 /* always for testing */ |
54 | else { |
55 | STRLEN len = UNISKIP(uv); |
56 | U8 *p = d+len-1; |
57 | while (p > d) { |
58 | *p-- = UTF_TO_NATIVE((uv & UTF_CONTINUATION_MASK) | UTF_CONTINUATION_MARK); |
59 | uv >>= UTF_ACCUMULATION_SHIFT; |
60 | } |
61 | *p = UTF_TO_NATIVE((uv & UTF_START_MASK(len)) | UTF_START_MARK(len)); |
62 | return d+len; |
63 | } |
64 | #else /* Non loop style */ |
a0ed51b3 |
65 | if (uv < 0x800) { |
66 | *d++ = (( uv >> 6) | 0xc0); |
67 | *d++ = (( uv & 0x3f) | 0x80); |
68 | return d; |
69 | } |
70 | if (uv < 0x10000) { |
71 | *d++ = (( uv >> 12) | 0xe0); |
72 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
73 | *d++ = (( uv & 0x3f) | 0x80); |
74 | return d; |
75 | } |
76 | if (uv < 0x200000) { |
77 | *d++ = (( uv >> 18) | 0xf0); |
78 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
79 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
80 | *d++ = (( uv & 0x3f) | 0x80); |
81 | return d; |
82 | } |
83 | if (uv < 0x4000000) { |
84 | *d++ = (( uv >> 24) | 0xf8); |
85 | *d++ = (((uv >> 18) & 0x3f) | 0x80); |
86 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
87 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
88 | *d++ = (( uv & 0x3f) | 0x80); |
89 | return d; |
90 | } |
91 | if (uv < 0x80000000) { |
92 | *d++ = (( uv >> 30) | 0xfc); |
93 | *d++ = (((uv >> 24) & 0x3f) | 0x80); |
94 | *d++ = (((uv >> 18) & 0x3f) | 0x80); |
95 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
96 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
97 | *d++ = (( uv & 0x3f) | 0x80); |
98 | return d; |
99 | } |
6b8eaf93 |
100 | #ifdef HAS_QUAD |
d7578b48 |
101 | if (uv < UTF8_QUAD_MAX) |
a0ed51b3 |
102 | #endif |
103 | { |
104 | *d++ = 0xfe; /* Can't match U+FEFF! */ |
105 | *d++ = (((uv >> 30) & 0x3f) | 0x80); |
106 | *d++ = (((uv >> 24) & 0x3f) | 0x80); |
107 | *d++ = (((uv >> 18) & 0x3f) | 0x80); |
108 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
109 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
110 | *d++ = (( uv & 0x3f) | 0x80); |
111 | return d; |
112 | } |
6b8eaf93 |
113 | #ifdef HAS_QUAD |
a0ed51b3 |
114 | { |
115 | *d++ = 0xff; /* Can't match U+FFFE! */ |
3c77ea2b |
116 | *d++ = 0x80; /* 6 Reserved bits */ |
117 | *d++ = (((uv >> 60) & 0x0f) | 0x80); /* 2 Reserved bits */ |
118 | *d++ = (((uv >> 54) & 0x3f) | 0x80); |
119 | *d++ = (((uv >> 48) & 0x3f) | 0x80); |
120 | *d++ = (((uv >> 42) & 0x3f) | 0x80); |
a0ed51b3 |
121 | *d++ = (((uv >> 36) & 0x3f) | 0x80); |
122 | *d++ = (((uv >> 30) & 0x3f) | 0x80); |
123 | *d++ = (((uv >> 24) & 0x3f) | 0x80); |
124 | *d++ = (((uv >> 18) & 0x3f) | 0x80); |
125 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
126 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
127 | *d++ = (( uv & 0x3f) | 0x80); |
128 | return d; |
129 | } |
130 | #endif |
1d72bdf6 |
131 | #endif /* Loop style */ |
a0ed51b3 |
132 | } |
133 | |
9041c2e3 |
134 | |
135 | |
136 | /* |
eebe1485 |
137 | =for apidoc A|STRLEN|is_utf8_char|U8 *s |
138 | |
5da9da9e |
139 | Tests if some arbitrary number of bytes begins in a valid UTF-8 |
1d72bdf6 |
140 | character. Note that an INVARIANT (i.e. ASCII) character is a valid UTF-8 character. |
5da9da9e |
141 | The actual number of bytes in the UTF-8 character will be returned if |
142 | it is valid, otherwise 0. |
9041c2e3 |
143 | |
37607a96 |
144 | =cut |
145 | */ |
067a85ef |
146 | STRLEN |
386d01d6 |
147 | Perl_is_utf8_char(pTHX_ U8 *s) |
148 | { |
149 | U8 u = *s; |
067a85ef |
150 | STRLEN slen, len; |
151 | UV uv, ouv; |
386d01d6 |
152 | |
1d72bdf6 |
153 | if (UTF8_IS_INVARIANT(u)) |
386d01d6 |
154 | return 1; |
155 | |
60006e79 |
156 | if (!UTF8_IS_START(u)) |
386d01d6 |
157 | return 0; |
158 | |
9f07fdcd |
159 | len = UTF8SKIP(s); |
386d01d6 |
160 | |
60006e79 |
161 | if (len < 2 || !UTF8_IS_CONTINUATION(s[1])) |
067a85ef |
162 | return 0; |
163 | |
386d01d6 |
164 | slen = len - 1; |
165 | s++; |
1d72bdf6 |
166 | /* The initial value is dubious */ |
167 | uv = u; |
067a85ef |
168 | ouv = uv; |
386d01d6 |
169 | while (slen--) { |
60006e79 |
170 | if (!UTF8_IS_CONTINUATION(*s)) |
386d01d6 |
171 | return 0; |
8850bf83 |
172 | uv = UTF8_ACCUMULATE(uv, *s); |
209a9bc1 |
173 | #if 0 |
174 | /* Depending on the compiler the wrap of the value takig pladve |
175 | * between 5 and 6 bytes of UTF-8 encoding either works or not. |
176 | * See similar spot in utf8_to_uvuni(). --jhi */ |
177 | if (uv < ouv) |
067a85ef |
178 | return 0; |
209a9bc1 |
179 | #endif |
067a85ef |
180 | ouv = uv; |
386d01d6 |
181 | s++; |
182 | } |
067a85ef |
183 | |
5bbb0b5a |
184 | if (UNISKIP(uv) < len) |
067a85ef |
185 | return 0; |
186 | |
386d01d6 |
187 | return len; |
188 | } |
189 | |
6662521e |
190 | /* |
eebe1485 |
191 | =for apidoc A|bool|is_utf8_string|U8 *s|STRLEN len |
6662521e |
192 | |
5da9da9e |
193 | Returns true if first C<len> bytes of the given string form a valid UTF8 |
194 | string, false otherwise. Note that 'a valid UTF8 string' does not mean |
195 | 'a string that contains UTF8' because a valid ASCII string is a valid |
196 | UTF8 string. |
6662521e |
197 | |
198 | =cut |
199 | */ |
200 | |
8e84507e |
201 | bool |
6662521e |
202 | Perl_is_utf8_string(pTHX_ U8 *s, STRLEN len) |
203 | { |
067a85ef |
204 | U8* x = s; |
1aa99e6b |
205 | U8* send; |
067a85ef |
206 | STRLEN c; |
207 | |
1aa99e6b |
208 | if (!len) |
6cd5fe39 |
209 | len = strlen((char *)s); |
1aa99e6b |
210 | send = s + len; |
211 | |
6662521e |
212 | while (x < send) { |
213 | c = is_utf8_char(x); |
067a85ef |
214 | if (!c) |
215 | return FALSE; |
6662521e |
216 | x += c; |
6662521e |
217 | } |
60006e79 |
218 | if (x != send) |
219 | return FALSE; |
067a85ef |
220 | |
221 | return TRUE; |
6662521e |
222 | } |
223 | |
67e989fb |
224 | /* |
9041c2e3 |
225 | =for apidoc A|UV|utf8n_to_uvuni|U8 *s|STRLEN curlen|STRLEN *retlen|U32 flags |
67e989fb |
226 | |
9041c2e3 |
227 | Bottom level UTF-8 decode routine. |
228 | Returns the unicode code point value of the first character in the string C<s> |
ba210ebe |
229 | which is assumed to be in UTF8 encoding and no longer than C<curlen>; |
7df053ec |
230 | C<retlen> will be set to the length, in bytes, of that character. |
67e989fb |
231 | |
232 | If C<s> does not point to a well-formed UTF8 character, the behaviour |
dcad2880 |
233 | is dependent on the value of C<flags>: if it contains UTF8_CHECK_ONLY, |
234 | it is assumed that the caller will raise a warning, and this function |
28d3d195 |
235 | will silently just set C<retlen> to C<-1> and return zero. If the |
236 | C<flags> does not contain UTF8_CHECK_ONLY, warnings about |
237 | malformations will be given, C<retlen> will be set to the expected |
238 | length of the UTF-8 character in bytes, and zero will be returned. |
239 | |
240 | The C<flags> can also contain various flags to allow deviations from |
241 | the strict UTF-8 encoding (see F<utf8.h>). |
67e989fb |
242 | |
9041c2e3 |
243 | Most code should use utf8_to_uvchr() rather than call this directly. |
244 | |
37607a96 |
245 | =cut |
246 | */ |
67e989fb |
247 | |
a0ed51b3 |
248 | UV |
37607a96 |
249 | Perl_utf8n_to_uvuni(pTHX_ U8 *s, STRLEN curlen, STRLEN *retlen, U32 flags) |
a0ed51b3 |
250 | { |
ba210ebe |
251 | UV uv = *s, ouv; |
252 | STRLEN len = 1; |
253 | bool dowarn = ckWARN_d(WARN_UTF8); |
254 | STRLEN expectlen = 0; |
a0dbb045 |
255 | U32 warning = 0; |
256 | |
257 | /* This list is a superset of the UTF8_ALLOW_XXX. */ |
258 | |
259 | #define UTF8_WARN_EMPTY 1 |
260 | #define UTF8_WARN_CONTINUATION 2 |
261 | #define UTF8_WARN_NON_CONTINUATION 3 |
262 | #define UTF8_WARN_FE_FF 4 |
263 | #define UTF8_WARN_SHORT 5 |
264 | #define UTF8_WARN_OVERFLOW 6 |
265 | #define UTF8_WARN_SURROGATE 7 |
266 | #define UTF8_WARN_BOM 8 |
267 | #define UTF8_WARN_LONG 9 |
268 | #define UTF8_WARN_FFFF 10 |
269 | |
270 | if (curlen == 0 && |
271 | !(flags & UTF8_ALLOW_EMPTY)) { |
272 | warning = UTF8_WARN_EMPTY; |
0c443dc2 |
273 | goto malformed; |
274 | } |
275 | |
1d72bdf6 |
276 | if (UTF8_IS_INVARIANT(uv)) { |
a0ed51b3 |
277 | if (retlen) |
278 | *retlen = 1; |
c4d5f83a |
279 | return (UV) (NATIVE_TO_UTF(*s)); |
a0ed51b3 |
280 | } |
67e989fb |
281 | |
421a8bf2 |
282 | if (UTF8_IS_CONTINUATION(uv) && |
fcc8fcf6 |
283 | !(flags & UTF8_ALLOW_CONTINUATION)) { |
a0dbb045 |
284 | warning = UTF8_WARN_CONTINUATION; |
ba210ebe |
285 | goto malformed; |
286 | } |
287 | |
421a8bf2 |
288 | if (UTF8_IS_START(uv) && curlen > 1 && !UTF8_IS_CONTINUATION(s[1]) && |
fcc8fcf6 |
289 | !(flags & UTF8_ALLOW_NON_CONTINUATION)) { |
a0dbb045 |
290 | warning = UTF8_WARN_NON_CONTINUATION; |
ba210ebe |
291 | goto malformed; |
292 | } |
9041c2e3 |
293 | |
1d72bdf6 |
294 | #ifdef EBCDIC |
75383841 |
295 | uv = NATIVE_TO_UTF(uv); |
1d72bdf6 |
296 | #else |
fcc8fcf6 |
297 | if ((uv == 0xfe || uv == 0xff) && |
298 | !(flags & UTF8_ALLOW_FE_FF)) { |
a0dbb045 |
299 | warning = UTF8_WARN_FE_FF; |
ba210ebe |
300 | goto malformed; |
a0ed51b3 |
301 | } |
1d72bdf6 |
302 | #endif |
303 | |
ba210ebe |
304 | if (!(uv & 0x20)) { len = 2; uv &= 0x1f; } |
305 | else if (!(uv & 0x10)) { len = 3; uv &= 0x0f; } |
306 | else if (!(uv & 0x08)) { len = 4; uv &= 0x07; } |
307 | else if (!(uv & 0x04)) { len = 5; uv &= 0x03; } |
1d72bdf6 |
308 | #ifdef EBCDIC |
309 | else if (!(uv & 0x02)) { len = 6; uv &= 0x01; } |
310 | else { len = 7; uv &= 0x01; } |
311 | #else |
ba210ebe |
312 | else if (!(uv & 0x02)) { len = 6; uv &= 0x01; } |
313 | else if (!(uv & 0x01)) { len = 7; uv = 0; } |
1d72bdf6 |
314 | else { len = 13; uv = 0; } /* whoa! */ |
315 | #endif |
316 | |
a0ed51b3 |
317 | if (retlen) |
318 | *retlen = len; |
9041c2e3 |
319 | |
ba210ebe |
320 | expectlen = len; |
321 | |
fcc8fcf6 |
322 | if ((curlen < expectlen) && |
323 | !(flags & UTF8_ALLOW_SHORT)) { |
a0dbb045 |
324 | warning = UTF8_WARN_SHORT; |
ba210ebe |
325 | goto malformed; |
326 | } |
327 | |
328 | len--; |
a0ed51b3 |
329 | s++; |
ba210ebe |
330 | ouv = uv; |
331 | |
a0ed51b3 |
332 | while (len--) { |
421a8bf2 |
333 | if (!UTF8_IS_CONTINUATION(*s) && |
334 | !(flags & UTF8_ALLOW_NON_CONTINUATION)) { |
a0dbb045 |
335 | s--; |
336 | warning = UTF8_WARN_NON_CONTINUATION; |
ba210ebe |
337 | goto malformed; |
a0ed51b3 |
338 | } |
339 | else |
8850bf83 |
340 | uv = UTF8_ACCUMULATE(uv, *s); |
a0dbb045 |
341 | if (!(uv > ouv)) { |
342 | /* These cannot be allowed. */ |
343 | if (uv == ouv) { |
344 | if (!(flags & UTF8_ALLOW_LONG)) { |
345 | warning = UTF8_WARN_LONG; |
346 | goto malformed; |
347 | } |
348 | } |
349 | else { /* uv < ouv */ |
209a9bc1 |
350 | #if 0 |
351 | /* Depending on the compiler the wrap of the value takig pladve |
352 | * between 5 and 6 bytes of UTF-8 encoding either works or not. |
353 | * See similar spot in is_utf8_char(). --jhi */ |
a0dbb045 |
354 | /* This cannot be allowed. */ |
355 | warning = UTF8_WARN_OVERFLOW; |
356 | goto malformed; |
209a9bc1 |
357 | #endif |
a0dbb045 |
358 | } |
ba210ebe |
359 | } |
360 | s++; |
361 | ouv = uv; |
362 | } |
363 | |
421a8bf2 |
364 | if (UNICODE_IS_SURROGATE(uv) && |
fcc8fcf6 |
365 | !(flags & UTF8_ALLOW_SURROGATE)) { |
a0dbb045 |
366 | warning = UTF8_WARN_SURROGATE; |
ba210ebe |
367 | goto malformed; |
421a8bf2 |
368 | } else if (UNICODE_IS_BYTE_ORDER_MARK(uv) && |
fcc8fcf6 |
369 | !(flags & UTF8_ALLOW_BOM)) { |
a0dbb045 |
370 | warning = UTF8_WARN_BOM; |
ba210ebe |
371 | goto malformed; |
fcc8fcf6 |
372 | } else if ((expectlen > UNISKIP(uv)) && |
373 | !(flags & UTF8_ALLOW_LONG)) { |
a0dbb045 |
374 | warning = UTF8_WARN_LONG; |
ba210ebe |
375 | goto malformed; |
421a8bf2 |
376 | } else if (UNICODE_IS_ILLEGAL(uv) && |
a9917092 |
377 | !(flags & UTF8_ALLOW_FFFF)) { |
a0dbb045 |
378 | warning = UTF8_WARN_FFFF; |
a9917092 |
379 | goto malformed; |
a0ed51b3 |
380 | } |
ba210ebe |
381 | |
a0ed51b3 |
382 | return uv; |
ba210ebe |
383 | |
384 | malformed: |
385 | |
fcc8fcf6 |
386 | if (flags & UTF8_CHECK_ONLY) { |
ba210ebe |
387 | if (retlen) |
cc366d4b |
388 | *retlen = -1; |
ba210ebe |
389 | return 0; |
390 | } |
391 | |
a0dbb045 |
392 | if (dowarn) { |
393 | SV* sv = sv_2mortal(newSVpv("Malformed UTF-8 character ", 0)); |
394 | |
395 | switch (warning) { |
396 | case 0: /* Intentionally empty. */ break; |
397 | case UTF8_WARN_EMPTY: |
398 | Perl_sv_catpvf(aTHX_ sv, "(empty string)"); |
399 | break; |
400 | case UTF8_WARN_CONTINUATION: |
401 | Perl_sv_catpvf(aTHX_ sv, "(unexpected continuation byte 0x%02"UVxf")", uv); |
402 | break; |
403 | case UTF8_WARN_NON_CONTINUATION: |
404 | Perl_sv_catpvf(aTHX_ sv, "(unexpected non-continuation byte 0x%02"UVxf" after start byte 0x%02"UVxf")", |
405 | (UV)s[1], uv); |
406 | break; |
407 | case UTF8_WARN_FE_FF: |
408 | Perl_sv_catpvf(aTHX_ sv, "(byte 0x%02"UVxf")", uv); |
409 | break; |
410 | case UTF8_WARN_SHORT: |
411 | Perl_sv_catpvf(aTHX_ sv, "(%d byte%s, need %d)", |
412 | curlen, curlen == 1 ? "" : "s", expectlen); |
413 | break; |
414 | case UTF8_WARN_OVERFLOW: |
415 | Perl_sv_catpvf(aTHX_ sv, "(overflow at 0x%"UVxf", byte 0x%02x)", |
416 | ouv, *s); |
417 | break; |
418 | case UTF8_WARN_SURROGATE: |
419 | Perl_sv_catpvf(aTHX_ sv, "(UTF-16 surrogate 0x%04"UVxf")", uv); |
420 | break; |
421 | case UTF8_WARN_BOM: |
422 | Perl_sv_catpvf(aTHX_ sv, "(byte order mark 0x%04"UVxf")", uv); |
423 | break; |
424 | case UTF8_WARN_LONG: |
425 | Perl_sv_catpvf(aTHX_ sv, "(%d byte%s, need %d)", |
426 | expectlen, expectlen == 1 ? "": "s", UNISKIP(uv)); |
427 | break; |
428 | case UTF8_WARN_FFFF: |
429 | Perl_sv_catpvf(aTHX_ sv, "(character 0x%04"UVxf")", uv); |
430 | break; |
431 | default: |
432 | Perl_sv_catpvf(aTHX_ sv, "(unknown reason)"); |
433 | break; |
434 | } |
435 | |
436 | if (warning) { |
437 | char *s = SvPVX(sv); |
438 | |
439 | if (PL_op) |
440 | Perl_warner(aTHX_ WARN_UTF8, |
441 | "%s in %s", s, PL_op_desc[PL_op->op_type]); |
442 | else |
443 | Perl_warner(aTHX_ WARN_UTF8, "%s", s); |
444 | } |
445 | } |
446 | |
ba210ebe |
447 | if (retlen) |
28d3d195 |
448 | *retlen = expectlen ? expectlen : len; |
ba210ebe |
449 | |
28d3d195 |
450 | return 0; |
a0ed51b3 |
451 | } |
452 | |
8e84507e |
453 | /* |
37607a96 |
454 | =for apidoc A|UV|utf8_to_uvchr|U8 *s|STRLEN *retlen |
9041c2e3 |
455 | |
456 | Returns the native character value of the first character in the string C<s> |
457 | which is assumed to be in UTF8 encoding; C<retlen> will be set to the |
458 | length, in bytes, of that character. |
459 | |
460 | If C<s> does not point to a well-formed UTF8 character, zero is |
461 | returned and retlen is set, if possible, to -1. |
462 | |
463 | =cut |
464 | */ |
465 | |
466 | UV |
37607a96 |
467 | Perl_utf8_to_uvchr(pTHX_ U8 *s, STRLEN *retlen) |
9041c2e3 |
468 | { |
469 | return Perl_utf8n_to_uvchr(aTHX_ s, UTF8_MAXLEN, retlen, 0); |
470 | } |
471 | |
472 | /* |
37607a96 |
473 | =for apidoc A|UV|utf8_to_uvuni|U8 *s|STRLEN *retlen |
9041c2e3 |
474 | |
475 | Returns the Unicode code point of the first character in the string C<s> |
476 | which is assumed to be in UTF8 encoding; C<retlen> will be set to the |
477 | length, in bytes, of that character. |
478 | |
479 | This function should only be used when returned UV is considered |
480 | an index into the Unicode semantic tables (e.g. swashes). |
481 | |
ba210ebe |
482 | If C<s> does not point to a well-formed UTF8 character, zero is |
483 | returned and retlen is set, if possible, to -1. |
8e84507e |
484 | |
485 | =cut |
486 | */ |
487 | |
488 | UV |
37607a96 |
489 | Perl_utf8_to_uvuni(pTHX_ U8 *s, STRLEN *retlen) |
8e84507e |
490 | { |
9041c2e3 |
491 | /* Call the low level routine asking for checks */ |
492 | return Perl_utf8n_to_uvuni(aTHX_ s, UTF8_MAXLEN, retlen, 0); |
8e84507e |
493 | } |
494 | |
b76347f2 |
495 | /* |
37607a96 |
496 | =for apidoc A|STRLEN|utf8_length|U8 *s|U8 *e |
b76347f2 |
497 | |
498 | Return the length of the UTF-8 char encoded string C<s> in characters. |
02eb7b47 |
499 | Stops at C<e> (inclusive). If C<e E<lt> s> or if the scan would end |
500 | up past C<e>, croaks. |
b76347f2 |
501 | |
502 | =cut |
503 | */ |
504 | |
505 | STRLEN |
37607a96 |
506 | Perl_utf8_length(pTHX_ U8 *s, U8 *e) |
b76347f2 |
507 | { |
508 | STRLEN len = 0; |
509 | |
8850bf83 |
510 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g. |
511 | * the bitops (especially ~) can create illegal UTF-8. |
512 | * In other words: in Perl UTF-8 is not just for Unicode. */ |
513 | |
b76347f2 |
514 | if (e < s) |
02eb7b47 |
515 | Perl_croak(aTHX_ "panic: utf8_length: unexpected end"); |
b76347f2 |
516 | while (s < e) { |
02eb7b47 |
517 | U8 t = UTF8SKIP(s); |
b76347f2 |
518 | |
519 | if (e - s < t) |
c4d5f83a |
520 | Perl_croak(aTHX_ "panic: utf8_length: s=%p (%02X) e=%p l=%d - unaligned end",s,*s,e,t); |
b76347f2 |
521 | s += t; |
522 | len++; |
523 | } |
524 | |
525 | return len; |
526 | } |
527 | |
b06226ff |
528 | /* |
eebe1485 |
529 | =for apidoc A|IV|utf8_distance|U8 *a|U8 *b |
b06226ff |
530 | |
531 | Returns the number of UTF8 characters between the UTF-8 pointers C<a> |
532 | and C<b>. |
533 | |
534 | WARNING: use only if you *know* that the pointers point inside the |
535 | same UTF-8 buffer. |
536 | |
37607a96 |
537 | =cut |
538 | */ |
a0ed51b3 |
539 | |
02eb7b47 |
540 | IV |
864dbfa3 |
541 | Perl_utf8_distance(pTHX_ U8 *a, U8 *b) |
a0ed51b3 |
542 | { |
02eb7b47 |
543 | IV off = 0; |
544 | |
8850bf83 |
545 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g. |
546 | * the bitops (especially ~) can create illegal UTF-8. |
547 | * In other words: in Perl UTF-8 is not just for Unicode. */ |
548 | |
a0ed51b3 |
549 | if (a < b) { |
550 | while (a < b) { |
02eb7b47 |
551 | U8 c = UTF8SKIP(a); |
552 | |
553 | if (b - a < c) |
554 | Perl_croak(aTHX_ "panic: utf8_distance: unaligned end"); |
555 | a += c; |
a0ed51b3 |
556 | off--; |
557 | } |
558 | } |
559 | else { |
560 | while (b < a) { |
02eb7b47 |
561 | U8 c = UTF8SKIP(b); |
562 | |
563 | if (a - b < c) |
564 | Perl_croak(aTHX_ "panic: utf8_distance: unaligned end"); |
565 | b += c; |
a0ed51b3 |
566 | off++; |
567 | } |
568 | } |
02eb7b47 |
569 | |
a0ed51b3 |
570 | return off; |
571 | } |
572 | |
b06226ff |
573 | /* |
37607a96 |
574 | =for apidoc A|U8 *|utf8_hop|U8 *s|I32 off |
b06226ff |
575 | |
8850bf83 |
576 | Return the UTF-8 pointer C<s> displaced by C<off> characters, either |
577 | forward or backward. |
b06226ff |
578 | |
579 | WARNING: do not use the following unless you *know* C<off> is within |
8850bf83 |
580 | the UTF-8 data pointed to by C<s> *and* that on entry C<s> is aligned |
581 | on the first byte of character or just after the last byte of a character. |
b06226ff |
582 | |
37607a96 |
583 | =cut |
584 | */ |
a0ed51b3 |
585 | |
586 | U8 * |
864dbfa3 |
587 | Perl_utf8_hop(pTHX_ U8 *s, I32 off) |
a0ed51b3 |
588 | { |
8850bf83 |
589 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g |
590 | * the bitops (especially ~) can create illegal UTF-8. |
591 | * In other words: in Perl UTF-8 is not just for Unicode. */ |
592 | |
a0ed51b3 |
593 | if (off >= 0) { |
594 | while (off--) |
595 | s += UTF8SKIP(s); |
596 | } |
597 | else { |
598 | while (off++) { |
599 | s--; |
8850bf83 |
600 | while (UTF8_IS_CONTINUATION(*s)) |
601 | s--; |
a0ed51b3 |
602 | } |
603 | } |
604 | return s; |
605 | } |
606 | |
6940069f |
607 | /* |
eebe1485 |
608 | =for apidoc A|U8 *|utf8_to_bytes|U8 *s|STRLEN *len |
6940069f |
609 | |
246fae53 |
610 | Converts a string C<s> of length C<len> from UTF8 into byte encoding. |
611 | Unlike C<bytes_to_utf8>, this over-writes the original string, and |
612 | updates len to contain the new length. |
67e989fb |
613 | Returns zero on failure, setting C<len> to -1. |
6940069f |
614 | |
615 | =cut |
616 | */ |
617 | |
618 | U8 * |
37607a96 |
619 | Perl_utf8_to_bytes(pTHX_ U8 *s, STRLEN *len) |
6940069f |
620 | { |
6940069f |
621 | U8 *send; |
622 | U8 *d; |
dcad2880 |
623 | U8 *save = s; |
246fae53 |
624 | |
625 | /* ensure valid UTF8 and chars < 256 before updating string */ |
dcad2880 |
626 | for (send = s + *len; s < send; ) { |
627 | U8 c = *s++; |
628 | |
1d72bdf6 |
629 | if (!UTF8_IS_INVARIANT(c) && |
630 | (!UTF8_IS_DOWNGRADEABLE_START(c) || (s >= send) |
631 | || !(c = *s++) || !UTF8_IS_CONTINUATION(c))) { |
dcad2880 |
632 | *len = -1; |
633 | return 0; |
634 | } |
246fae53 |
635 | } |
dcad2880 |
636 | |
637 | d = s = save; |
6940069f |
638 | while (s < send) { |
ed646e6e |
639 | STRLEN ulen; |
9041c2e3 |
640 | *d++ = (U8)utf8_to_uvchr(s, &ulen); |
ed646e6e |
641 | s += ulen; |
6940069f |
642 | } |
643 | *d = '\0'; |
246fae53 |
644 | *len = d - save; |
6940069f |
645 | return save; |
646 | } |
647 | |
648 | /* |
f9a63242 |
649 | =for apidoc A|U8 *|bytes_from_utf8|U8 *s|STRLEN *len|bool *is_utf8 |
650 | |
651 | Converts a string C<s> of length C<len> from UTF8 into byte encoding. |
652 | Unlike <utf8_to_bytes> but like C<bytes_to_utf8>, returns a pointer to |
ef9edfd0 |
653 | the newly-created string, and updates C<len> to contain the new |
654 | length. Returns the original string if no conversion occurs, C<len> |
655 | is unchanged. Do nothing if C<is_utf8> points to 0. Sets C<is_utf8> to |
656 | 0 if C<s> is converted or contains all 7bit characters. |
f9a63242 |
657 | |
37607a96 |
658 | =cut |
659 | */ |
f9a63242 |
660 | |
661 | U8 * |
37607a96 |
662 | Perl_bytes_from_utf8(pTHX_ U8 *s, STRLEN *len, bool *is_utf8) |
f9a63242 |
663 | { |
f9a63242 |
664 | U8 *d; |
665 | U8 *start = s; |
db42d148 |
666 | U8 *send; |
f9a63242 |
667 | I32 count = 0; |
668 | |
669 | if (!*is_utf8) |
670 | return start; |
671 | |
ef9edfd0 |
672 | /* ensure valid UTF8 and chars < 256 before converting string */ |
f9a63242 |
673 | for (send = s + *len; s < send;) { |
674 | U8 c = *s++; |
1d72bdf6 |
675 | if (!UTF8_IS_INVARIANT(c)) { |
db42d148 |
676 | if (UTF8_IS_DOWNGRADEABLE_START(c) && s < send && |
677 | (c = *s++) && UTF8_IS_CONTINUATION(c)) |
678 | count++; |
679 | else |
f9a63242 |
680 | return start; |
db42d148 |
681 | } |
f9a63242 |
682 | } |
683 | |
684 | *is_utf8 = 0; |
685 | |
f9a63242 |
686 | Newz(801, d, (*len) - count + 1, U8); |
ef9edfd0 |
687 | s = start; start = d; |
f9a63242 |
688 | while (s < send) { |
689 | U8 c = *s++; |
c4d5f83a |
690 | if (!UTF8_IS_INVARIANT(c)) { |
691 | /* Then it is two-byte encoded */ |
692 | c = UTF8_ACCUMULATE(NATIVE_TO_UTF(c), *s++); |
693 | c = ASCII_TO_NATIVE(c); |
694 | } |
695 | *d++ = c; |
f9a63242 |
696 | } |
697 | *d = '\0'; |
698 | *len = d - start; |
699 | return start; |
700 | } |
701 | |
702 | /* |
eebe1485 |
703 | =for apidoc A|U8 *|bytes_to_utf8|U8 *s|STRLEN *len |
6940069f |
704 | |
705 | Converts a string C<s> of length C<len> from ASCII into UTF8 encoding. |
6662521e |
706 | Returns a pointer to the newly-created string, and sets C<len> to |
707 | reflect the new length. |
6940069f |
708 | |
497711e7 |
709 | =cut |
6940069f |
710 | */ |
711 | |
712 | U8* |
37607a96 |
713 | Perl_bytes_to_utf8(pTHX_ U8 *s, STRLEN *len) |
6940069f |
714 | { |
6940069f |
715 | U8 *send; |
716 | U8 *d; |
717 | U8 *dst; |
6662521e |
718 | send = s + (*len); |
6940069f |
719 | |
6662521e |
720 | Newz(801, d, (*len) * 2 + 1, U8); |
6940069f |
721 | dst = d; |
722 | |
723 | while (s < send) { |
db42d148 |
724 | UV uv = NATIVE_TO_ASCII(*s++); |
c4d5f83a |
725 | if (UNI_IS_INVARIANT(uv)) |
726 | *d++ = UTF_TO_NATIVE(uv); |
6940069f |
727 | else { |
90f44359 |
728 | *d++ = UTF8_EIGHT_BIT_HI(uv); |
729 | *d++ = UTF8_EIGHT_BIT_LO(uv); |
6940069f |
730 | } |
731 | } |
732 | *d = '\0'; |
6662521e |
733 | *len = d-dst; |
6940069f |
734 | return dst; |
735 | } |
736 | |
a0ed51b3 |
737 | /* |
dea0fc0b |
738 | * Convert native (big-endian) or reversed (little-endian) UTF-16 to UTF-8. |
a0ed51b3 |
739 | * |
740 | * Destination must be pre-extended to 3/2 source. Do not use in-place. |
741 | * We optimize for native, for obvious reasons. */ |
742 | |
743 | U8* |
dea0fc0b |
744 | Perl_utf16_to_utf8(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 |
745 | { |
dea0fc0b |
746 | U8* pend; |
747 | U8* dstart = d; |
748 | |
749 | if (bytelen & 1) |
a7867d0a |
750 | Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen"); |
dea0fc0b |
751 | |
752 | pend = p + bytelen; |
753 | |
a0ed51b3 |
754 | while (p < pend) { |
dea0fc0b |
755 | UV uv = (p[0] << 8) + p[1]; /* UTF-16BE */ |
756 | p += 2; |
a0ed51b3 |
757 | if (uv < 0x80) { |
758 | *d++ = uv; |
759 | continue; |
760 | } |
761 | if (uv < 0x800) { |
762 | *d++ = (( uv >> 6) | 0xc0); |
763 | *d++ = (( uv & 0x3f) | 0x80); |
764 | continue; |
765 | } |
766 | if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */ |
dea0fc0b |
767 | UV low = *p++; |
768 | if (low < 0xdc00 || low >= 0xdfff) |
769 | Perl_croak(aTHX_ "Malformed UTF-16 surrogate"); |
a0ed51b3 |
770 | uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000; |
771 | } |
772 | if (uv < 0x10000) { |
773 | *d++ = (( uv >> 12) | 0xe0); |
774 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
775 | *d++ = (( uv & 0x3f) | 0x80); |
776 | continue; |
777 | } |
778 | else { |
779 | *d++ = (( uv >> 18) | 0xf0); |
780 | *d++ = (((uv >> 12) & 0x3f) | 0x80); |
781 | *d++ = (((uv >> 6) & 0x3f) | 0x80); |
782 | *d++ = (( uv & 0x3f) | 0x80); |
783 | continue; |
784 | } |
785 | } |
dea0fc0b |
786 | *newlen = d - dstart; |
a0ed51b3 |
787 | return d; |
788 | } |
789 | |
790 | /* Note: this one is slightly destructive of the source. */ |
791 | |
792 | U8* |
dea0fc0b |
793 | Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 |
794 | { |
795 | U8* s = (U8*)p; |
796 | U8* send = s + bytelen; |
797 | while (s < send) { |
798 | U8 tmp = s[0]; |
799 | s[0] = s[1]; |
800 | s[1] = tmp; |
801 | s += 2; |
802 | } |
dea0fc0b |
803 | return utf16_to_utf8(p, d, bytelen, newlen); |
a0ed51b3 |
804 | } |
805 | |
806 | /* for now these are all defined (inefficiently) in terms of the utf8 versions */ |
807 | |
808 | bool |
864dbfa3 |
809 | Perl_is_uni_alnum(pTHX_ U32 c) |
a0ed51b3 |
810 | { |
ad391ad9 |
811 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
812 | uvchr_to_utf8(tmpbuf, (UV)c); |
a0ed51b3 |
813 | return is_utf8_alnum(tmpbuf); |
814 | } |
815 | |
816 | bool |
b8c5462f |
817 | Perl_is_uni_alnumc(pTHX_ U32 c) |
818 | { |
ad391ad9 |
819 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
820 | uvchr_to_utf8(tmpbuf, (UV)c); |
b8c5462f |
821 | return is_utf8_alnumc(tmpbuf); |
822 | } |
823 | |
824 | bool |
864dbfa3 |
825 | Perl_is_uni_idfirst(pTHX_ U32 c) |
a0ed51b3 |
826 | { |
ad391ad9 |
827 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
828 | uvchr_to_utf8(tmpbuf, (UV)c); |
a0ed51b3 |
829 | return is_utf8_idfirst(tmpbuf); |
830 | } |
831 | |
832 | bool |
864dbfa3 |
833 | Perl_is_uni_alpha(pTHX_ U32 c) |
a0ed51b3 |
834 | { |
ad391ad9 |
835 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
836 | uvchr_to_utf8(tmpbuf, (UV)c); |
a0ed51b3 |
837 | return is_utf8_alpha(tmpbuf); |
838 | } |
839 | |
840 | bool |
4d61ec05 |
841 | Perl_is_uni_ascii(pTHX_ U32 c) |
842 | { |
ad391ad9 |
843 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
844 | uvchr_to_utf8(tmpbuf, (UV)c); |
4d61ec05 |
845 | return is_utf8_ascii(tmpbuf); |
846 | } |
847 | |
848 | bool |
864dbfa3 |
849 | Perl_is_uni_space(pTHX_ U32 c) |
a0ed51b3 |
850 | { |
ad391ad9 |
851 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
852 | uvchr_to_utf8(tmpbuf, (UV)c); |
a0ed51b3 |
853 | return is_utf8_space(tmpbuf); |
854 | } |
855 | |
856 | bool |
864dbfa3 |
857 | Perl_is_uni_digit(pTHX_ U32 c) |
a0ed51b3 |
858 | { |
ad391ad9 |
859 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
860 | uvchr_to_utf8(tmpbuf, (UV)c); |
a0ed51b3 |
861 | return is_utf8_digit(tmpbuf); |
862 | } |
863 | |
864 | bool |
864dbfa3 |
865 | Perl_is_uni_upper(pTHX_ U32 c) |
a0ed51b3 |
866 | { |
ad391ad9 |
867 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
868 | uvchr_to_utf8(tmpbuf, (UV)c); |
a0ed51b3 |
869 | return is_utf8_upper(tmpbuf); |
870 | } |
871 | |
872 | bool |
864dbfa3 |
873 | Perl_is_uni_lower(pTHX_ U32 c) |
a0ed51b3 |
874 | { |
ad391ad9 |
875 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
876 | uvchr_to_utf8(tmpbuf, (UV)c); |
a0ed51b3 |
877 | return is_utf8_lower(tmpbuf); |
878 | } |
879 | |
880 | bool |
b8c5462f |
881 | Perl_is_uni_cntrl(pTHX_ U32 c) |
882 | { |
ad391ad9 |
883 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
884 | uvchr_to_utf8(tmpbuf, (UV)c); |
b8c5462f |
885 | return is_utf8_cntrl(tmpbuf); |
886 | } |
887 | |
888 | bool |
889 | Perl_is_uni_graph(pTHX_ U32 c) |
890 | { |
ad391ad9 |
891 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
892 | uvchr_to_utf8(tmpbuf, (UV)c); |
b8c5462f |
893 | return is_utf8_graph(tmpbuf); |
894 | } |
895 | |
896 | bool |
864dbfa3 |
897 | Perl_is_uni_print(pTHX_ U32 c) |
a0ed51b3 |
898 | { |
ad391ad9 |
899 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
900 | uvchr_to_utf8(tmpbuf, (UV)c); |
a0ed51b3 |
901 | return is_utf8_print(tmpbuf); |
902 | } |
903 | |
b8c5462f |
904 | bool |
f248d071 |
905 | Perl_is_uni_punct(pTHX_ U32 c) |
b8c5462f |
906 | { |
ad391ad9 |
907 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
908 | uvchr_to_utf8(tmpbuf, (UV)c); |
b8c5462f |
909 | return is_utf8_punct(tmpbuf); |
910 | } |
911 | |
4d61ec05 |
912 | bool |
913 | Perl_is_uni_xdigit(pTHX_ U32 c) |
914 | { |
ad391ad9 |
915 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
916 | uvchr_to_utf8(tmpbuf, (UV)c); |
4d61ec05 |
917 | return is_utf8_xdigit(tmpbuf); |
918 | } |
919 | |
a0ed51b3 |
920 | U32 |
864dbfa3 |
921 | Perl_to_uni_upper(pTHX_ U32 c) |
a0ed51b3 |
922 | { |
ad391ad9 |
923 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
924 | uvchr_to_utf8(tmpbuf, (UV)c); |
a0ed51b3 |
925 | return to_utf8_upper(tmpbuf); |
926 | } |
927 | |
928 | U32 |
864dbfa3 |
929 | Perl_to_uni_title(pTHX_ U32 c) |
a0ed51b3 |
930 | { |
ad391ad9 |
931 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
932 | uvchr_to_utf8(tmpbuf, (UV)c); |
a0ed51b3 |
933 | return to_utf8_title(tmpbuf); |
934 | } |
935 | |
936 | U32 |
864dbfa3 |
937 | Perl_to_uni_lower(pTHX_ U32 c) |
a0ed51b3 |
938 | { |
ad391ad9 |
939 | U8 tmpbuf[UTF8_MAXLEN+1]; |
2b9d42f0 |
940 | uvchr_to_utf8(tmpbuf, (UV)c); |
a0ed51b3 |
941 | return to_utf8_lower(tmpbuf); |
942 | } |
943 | |
944 | /* for now these all assume no locale info available for Unicode > 255 */ |
945 | |
946 | bool |
864dbfa3 |
947 | Perl_is_uni_alnum_lc(pTHX_ U32 c) |
a0ed51b3 |
948 | { |
949 | return is_uni_alnum(c); /* XXX no locale support yet */ |
950 | } |
951 | |
952 | bool |
b8c5462f |
953 | Perl_is_uni_alnumc_lc(pTHX_ U32 c) |
954 | { |
955 | return is_uni_alnumc(c); /* XXX no locale support yet */ |
956 | } |
957 | |
958 | bool |
864dbfa3 |
959 | Perl_is_uni_idfirst_lc(pTHX_ U32 c) |
a0ed51b3 |
960 | { |
961 | return is_uni_idfirst(c); /* XXX no locale support yet */ |
962 | } |
963 | |
964 | bool |
864dbfa3 |
965 | Perl_is_uni_alpha_lc(pTHX_ U32 c) |
a0ed51b3 |
966 | { |
967 | return is_uni_alpha(c); /* XXX no locale support yet */ |
968 | } |
969 | |
970 | bool |
4d61ec05 |
971 | Perl_is_uni_ascii_lc(pTHX_ U32 c) |
972 | { |
973 | return is_uni_ascii(c); /* XXX no locale support yet */ |
974 | } |
975 | |
976 | bool |
864dbfa3 |
977 | Perl_is_uni_space_lc(pTHX_ U32 c) |
a0ed51b3 |
978 | { |
979 | return is_uni_space(c); /* XXX no locale support yet */ |
980 | } |
981 | |
982 | bool |
864dbfa3 |
983 | Perl_is_uni_digit_lc(pTHX_ U32 c) |
a0ed51b3 |
984 | { |
985 | return is_uni_digit(c); /* XXX no locale support yet */ |
986 | } |
987 | |
988 | bool |
864dbfa3 |
989 | Perl_is_uni_upper_lc(pTHX_ U32 c) |
a0ed51b3 |
990 | { |
991 | return is_uni_upper(c); /* XXX no locale support yet */ |
992 | } |
993 | |
994 | bool |
864dbfa3 |
995 | Perl_is_uni_lower_lc(pTHX_ U32 c) |
a0ed51b3 |
996 | { |
997 | return is_uni_lower(c); /* XXX no locale support yet */ |
998 | } |
999 | |
1000 | bool |
b8c5462f |
1001 | Perl_is_uni_cntrl_lc(pTHX_ U32 c) |
1002 | { |
1003 | return is_uni_cntrl(c); /* XXX no locale support yet */ |
1004 | } |
1005 | |
1006 | bool |
1007 | Perl_is_uni_graph_lc(pTHX_ U32 c) |
1008 | { |
1009 | return is_uni_graph(c); /* XXX no locale support yet */ |
1010 | } |
1011 | |
1012 | bool |
864dbfa3 |
1013 | Perl_is_uni_print_lc(pTHX_ U32 c) |
a0ed51b3 |
1014 | { |
1015 | return is_uni_print(c); /* XXX no locale support yet */ |
1016 | } |
1017 | |
b8c5462f |
1018 | bool |
1019 | Perl_is_uni_punct_lc(pTHX_ U32 c) |
1020 | { |
1021 | return is_uni_punct(c); /* XXX no locale support yet */ |
1022 | } |
1023 | |
4d61ec05 |
1024 | bool |
1025 | Perl_is_uni_xdigit_lc(pTHX_ U32 c) |
1026 | { |
1027 | return is_uni_xdigit(c); /* XXX no locale support yet */ |
1028 | } |
1029 | |
a0ed51b3 |
1030 | U32 |
864dbfa3 |
1031 | Perl_to_uni_upper_lc(pTHX_ U32 c) |
a0ed51b3 |
1032 | { |
1033 | return to_uni_upper(c); /* XXX no locale support yet */ |
1034 | } |
1035 | |
1036 | U32 |
864dbfa3 |
1037 | Perl_to_uni_title_lc(pTHX_ U32 c) |
a0ed51b3 |
1038 | { |
1039 | return to_uni_title(c); /* XXX no locale support yet */ |
1040 | } |
1041 | |
1042 | U32 |
864dbfa3 |
1043 | Perl_to_uni_lower_lc(pTHX_ U32 c) |
a0ed51b3 |
1044 | { |
1045 | return to_uni_lower(c); /* XXX no locale support yet */ |
1046 | } |
1047 | |
a0ed51b3 |
1048 | bool |
864dbfa3 |
1049 | Perl_is_utf8_alnum(pTHX_ U8 *p) |
a0ed51b3 |
1050 | { |
386d01d6 |
1051 | if (!is_utf8_char(p)) |
1052 | return FALSE; |
a0ed51b3 |
1053 | if (!PL_utf8_alnum) |
289d4f09 |
1054 | /* NOTE: "IsWord", not "IsAlnum", since Alnum is a true |
1055 | * descendant of isalnum(3), in other words, it doesn't |
1056 | * contain the '_'. --jhi */ |
1057 | PL_utf8_alnum = swash_init("utf8", "IsWord", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1058 | return swash_fetch(PL_utf8_alnum, p); |
1059 | /* return *p == '_' || is_utf8_alpha(p) || is_utf8_digit(p); */ |
1060 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ |
1061 | if (!PL_utf8_alnum) |
1062 | PL_utf8_alnum = swash_init("utf8", "", |
1063 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); |
1064 | return swash_fetch(PL_utf8_alnum, p); |
1065 | #endif |
1066 | } |
1067 | |
1068 | bool |
b8c5462f |
1069 | Perl_is_utf8_alnumc(pTHX_ U8 *p) |
1070 | { |
386d01d6 |
1071 | if (!is_utf8_char(p)) |
1072 | return FALSE; |
b8c5462f |
1073 | if (!PL_utf8_alnum) |
1074 | PL_utf8_alnum = swash_init("utf8", "IsAlnumC", &PL_sv_undef, 0, 0); |
1075 | return swash_fetch(PL_utf8_alnum, p); |
1076 | /* return is_utf8_alpha(p) || is_utf8_digit(p); */ |
1077 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ |
1078 | if (!PL_utf8_alnum) |
1079 | PL_utf8_alnum = swash_init("utf8", "", |
1080 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); |
1081 | return swash_fetch(PL_utf8_alnum, p); |
1082 | #endif |
1083 | } |
1084 | |
1085 | bool |
864dbfa3 |
1086 | Perl_is_utf8_idfirst(pTHX_ U8 *p) |
a0ed51b3 |
1087 | { |
1088 | return *p == '_' || is_utf8_alpha(p); |
1089 | } |
1090 | |
1091 | bool |
864dbfa3 |
1092 | Perl_is_utf8_alpha(pTHX_ U8 *p) |
a0ed51b3 |
1093 | { |
386d01d6 |
1094 | if (!is_utf8_char(p)) |
1095 | return FALSE; |
a0ed51b3 |
1096 | if (!PL_utf8_alpha) |
e24b16f9 |
1097 | PL_utf8_alpha = swash_init("utf8", "IsAlpha", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1098 | return swash_fetch(PL_utf8_alpha, p); |
1099 | } |
1100 | |
1101 | bool |
b8c5462f |
1102 | Perl_is_utf8_ascii(pTHX_ U8 *p) |
1103 | { |
386d01d6 |
1104 | if (!is_utf8_char(p)) |
1105 | return FALSE; |
b8c5462f |
1106 | if (!PL_utf8_ascii) |
1107 | PL_utf8_ascii = swash_init("utf8", "IsAscii", &PL_sv_undef, 0, 0); |
1108 | return swash_fetch(PL_utf8_ascii, p); |
1109 | } |
1110 | |
1111 | bool |
864dbfa3 |
1112 | Perl_is_utf8_space(pTHX_ U8 *p) |
a0ed51b3 |
1113 | { |
386d01d6 |
1114 | if (!is_utf8_char(p)) |
1115 | return FALSE; |
a0ed51b3 |
1116 | if (!PL_utf8_space) |
3bec3564 |
1117 | PL_utf8_space = swash_init("utf8", "IsSpacePerl", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1118 | return swash_fetch(PL_utf8_space, p); |
1119 | } |
1120 | |
1121 | bool |
864dbfa3 |
1122 | Perl_is_utf8_digit(pTHX_ U8 *p) |
a0ed51b3 |
1123 | { |
386d01d6 |
1124 | if (!is_utf8_char(p)) |
1125 | return FALSE; |
a0ed51b3 |
1126 | if (!PL_utf8_digit) |
e24b16f9 |
1127 | PL_utf8_digit = swash_init("utf8", "IsDigit", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1128 | return swash_fetch(PL_utf8_digit, p); |
1129 | } |
1130 | |
1131 | bool |
864dbfa3 |
1132 | Perl_is_utf8_upper(pTHX_ U8 *p) |
a0ed51b3 |
1133 | { |
386d01d6 |
1134 | if (!is_utf8_char(p)) |
1135 | return FALSE; |
a0ed51b3 |
1136 | if (!PL_utf8_upper) |
e24b16f9 |
1137 | PL_utf8_upper = swash_init("utf8", "IsUpper", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1138 | return swash_fetch(PL_utf8_upper, p); |
1139 | } |
1140 | |
1141 | bool |
864dbfa3 |
1142 | Perl_is_utf8_lower(pTHX_ U8 *p) |
a0ed51b3 |
1143 | { |
386d01d6 |
1144 | if (!is_utf8_char(p)) |
1145 | return FALSE; |
a0ed51b3 |
1146 | if (!PL_utf8_lower) |
e24b16f9 |
1147 | PL_utf8_lower = swash_init("utf8", "IsLower", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1148 | return swash_fetch(PL_utf8_lower, p); |
1149 | } |
1150 | |
1151 | bool |
b8c5462f |
1152 | Perl_is_utf8_cntrl(pTHX_ U8 *p) |
1153 | { |
386d01d6 |
1154 | if (!is_utf8_char(p)) |
1155 | return FALSE; |
b8c5462f |
1156 | if (!PL_utf8_cntrl) |
1157 | PL_utf8_cntrl = swash_init("utf8", "IsCntrl", &PL_sv_undef, 0, 0); |
1158 | return swash_fetch(PL_utf8_cntrl, p); |
1159 | } |
1160 | |
1161 | bool |
1162 | Perl_is_utf8_graph(pTHX_ U8 *p) |
1163 | { |
386d01d6 |
1164 | if (!is_utf8_char(p)) |
1165 | return FALSE; |
b8c5462f |
1166 | if (!PL_utf8_graph) |
1167 | PL_utf8_graph = swash_init("utf8", "IsGraph", &PL_sv_undef, 0, 0); |
1168 | return swash_fetch(PL_utf8_graph, p); |
1169 | } |
1170 | |
1171 | bool |
864dbfa3 |
1172 | Perl_is_utf8_print(pTHX_ U8 *p) |
a0ed51b3 |
1173 | { |
386d01d6 |
1174 | if (!is_utf8_char(p)) |
1175 | return FALSE; |
a0ed51b3 |
1176 | if (!PL_utf8_print) |
e24b16f9 |
1177 | PL_utf8_print = swash_init("utf8", "IsPrint", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1178 | return swash_fetch(PL_utf8_print, p); |
1179 | } |
1180 | |
1181 | bool |
b8c5462f |
1182 | Perl_is_utf8_punct(pTHX_ U8 *p) |
1183 | { |
386d01d6 |
1184 | if (!is_utf8_char(p)) |
1185 | return FALSE; |
b8c5462f |
1186 | if (!PL_utf8_punct) |
1187 | PL_utf8_punct = swash_init("utf8", "IsPunct", &PL_sv_undef, 0, 0); |
1188 | return swash_fetch(PL_utf8_punct, p); |
1189 | } |
1190 | |
1191 | bool |
1192 | Perl_is_utf8_xdigit(pTHX_ U8 *p) |
1193 | { |
386d01d6 |
1194 | if (!is_utf8_char(p)) |
1195 | return FALSE; |
b8c5462f |
1196 | if (!PL_utf8_xdigit) |
1197 | PL_utf8_xdigit = swash_init("utf8", "IsXDigit", &PL_sv_undef, 0, 0); |
1198 | return swash_fetch(PL_utf8_xdigit, p); |
1199 | } |
1200 | |
1201 | bool |
864dbfa3 |
1202 | Perl_is_utf8_mark(pTHX_ U8 *p) |
a0ed51b3 |
1203 | { |
386d01d6 |
1204 | if (!is_utf8_char(p)) |
1205 | return FALSE; |
a0ed51b3 |
1206 | if (!PL_utf8_mark) |
e24b16f9 |
1207 | PL_utf8_mark = swash_init("utf8", "IsM", &PL_sv_undef, 0, 0); |
a0ed51b3 |
1208 | return swash_fetch(PL_utf8_mark, p); |
1209 | } |
1210 | |
2104c8d9 |
1211 | UV |
864dbfa3 |
1212 | Perl_to_utf8_upper(pTHX_ U8 *p) |
a0ed51b3 |
1213 | { |
1214 | UV uv; |
1215 | |
1216 | if (!PL_utf8_toupper) |
e24b16f9 |
1217 | PL_utf8_toupper = swash_init("utf8", "ToUpper", &PL_sv_undef, 4, 0); |
a0ed51b3 |
1218 | uv = swash_fetch(PL_utf8_toupper, p); |
9041c2e3 |
1219 | return uv ? UNI_TO_NATIVE(uv) : utf8_to_uvchr(p,0); |
a0ed51b3 |
1220 | } |
1221 | |
2104c8d9 |
1222 | UV |
864dbfa3 |
1223 | Perl_to_utf8_title(pTHX_ U8 *p) |
a0ed51b3 |
1224 | { |
1225 | UV uv; |
1226 | |
1227 | if (!PL_utf8_totitle) |
e24b16f9 |
1228 | PL_utf8_totitle = swash_init("utf8", "ToTitle", &PL_sv_undef, 4, 0); |
a0ed51b3 |
1229 | uv = swash_fetch(PL_utf8_totitle, p); |
9041c2e3 |
1230 | return uv ? UNI_TO_NATIVE(uv) : utf8_to_uvchr(p,0); |
a0ed51b3 |
1231 | } |
1232 | |
2104c8d9 |
1233 | UV |
864dbfa3 |
1234 | Perl_to_utf8_lower(pTHX_ U8 *p) |
a0ed51b3 |
1235 | { |
1236 | UV uv; |
1237 | |
1238 | if (!PL_utf8_tolower) |
e24b16f9 |
1239 | PL_utf8_tolower = swash_init("utf8", "ToLower", &PL_sv_undef, 4, 0); |
a0ed51b3 |
1240 | uv = swash_fetch(PL_utf8_tolower, p); |
9041c2e3 |
1241 | return uv ? UNI_TO_NATIVE(uv) : utf8_to_uvchr(p,0); |
a0ed51b3 |
1242 | } |
1243 | |
1244 | /* a "swash" is a swatch hash */ |
1245 | |
1246 | SV* |
864dbfa3 |
1247 | Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none) |
a0ed51b3 |
1248 | { |
1249 | SV* retval; |
bf1fed83 |
1250 | SV* tokenbufsv = sv_2mortal(NEWSV(0,0)); |
8e84507e |
1251 | dSP; |
1b026014 |
1252 | HV *stash = gv_stashpvn(pkg, strlen(pkg), FALSE); |
ce3b816e |
1253 | |
1b026014 |
1254 | if (!gv_fetchmeth(stash, "SWASHNEW", 8, -1)) { /* demand load utf8 */ |
ce3b816e |
1255 | ENTER; |
1256 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpv(pkg,0), Nullsv); |
1257 | LEAVE; |
1258 | } |
1259 | SPAGAIN; |
a0ed51b3 |
1260 | PUSHSTACKi(PERLSI_MAGIC); |
1261 | PUSHMARK(SP); |
1262 | EXTEND(SP,5); |
1263 | PUSHs(sv_2mortal(newSVpvn(pkg, strlen(pkg)))); |
1264 | PUSHs(sv_2mortal(newSVpvn(name, strlen(name)))); |
1265 | PUSHs(listsv); |
1266 | PUSHs(sv_2mortal(newSViv(minbits))); |
1267 | PUSHs(sv_2mortal(newSViv(none))); |
1268 | PUTBACK; |
1269 | ENTER; |
1270 | SAVEI32(PL_hints); |
1271 | PL_hints = 0; |
1272 | save_re_context(); |
bf1fed83 |
1273 | if (PL_curcop == &PL_compiling) |
1274 | /* XXX ought to be handled by lex_start */ |
1275 | sv_setpv(tokenbufsv, PL_tokenbuf); |
864dbfa3 |
1276 | if (call_method("SWASHNEW", G_SCALAR)) |
8e84507e |
1277 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 |
1278 | else |
e24b16f9 |
1279 | retval = &PL_sv_undef; |
a0ed51b3 |
1280 | LEAVE; |
1281 | POPSTACK; |
e24b16f9 |
1282 | if (PL_curcop == &PL_compiling) { |
bf1fed83 |
1283 | STRLEN len; |
1284 | char* pv = SvPV(tokenbufsv, len); |
1285 | |
1286 | Copy(pv, PL_tokenbuf, len+1, char); |
e24b16f9 |
1287 | PL_curcop->op_private = PL_hints; |
a0ed51b3 |
1288 | } |
1289 | if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV) |
cea2e8a9 |
1290 | Perl_croak(aTHX_ "SWASHNEW didn't return an HV ref"); |
a0ed51b3 |
1291 | return retval; |
1292 | } |
1293 | |
1294 | UV |
864dbfa3 |
1295 | Perl_swash_fetch(pTHX_ SV *sv, U8 *ptr) |
a0ed51b3 |
1296 | { |
1297 | HV* hv = (HV*)SvRV(sv); |
7d85a32c |
1298 | /* Given a UTF-X encoded char 0xAA..0xYY,0xZZ |
1299 | then the "swatch" is a vec() for al the chars which start |
1300 | with 0xAA..0xYY |
1301 | So the key in the hash is length of encoded char -1 |
1302 | */ |
a0ed51b3 |
1303 | U32 klen = UTF8SKIP(ptr) - 1; |
7d85a32c |
1304 | U32 off = ptr[klen]; |
a0ed51b3 |
1305 | STRLEN slen; |
7d85a32c |
1306 | STRLEN needents; |
dfe13c55 |
1307 | U8 *tmps; |
a0ed51b3 |
1308 | U32 bit; |
1309 | SV *retval; |
1310 | |
7d85a32c |
1311 | if (klen == 0) |
1312 | { |
1313 | /* If char in invariant then swatch is for all the invariant chars |
1314 | * In both UTF-8 and UTF8-MOD that happens to be UTF_CONTINUATION_MARK |
1315 | */ |
1316 | needents = UTF_CONTINUATION_MARK; |
1317 | off = NATIVE_TO_UTF(ptr[klen]); |
1318 | } |
1319 | else |
1320 | { |
1321 | /* If char is encoded then swatch is for the prefix */ |
1322 | needents = (1 << UTF_ACCUMULATION_SHIFT); |
1323 | off = NATIVE_TO_UTF(ptr[klen]) & UTF_CONTINUATION_MASK; |
1324 | } |
1325 | |
a0ed51b3 |
1326 | /* |
1327 | * This single-entry cache saves about 1/3 of the utf8 overhead in test |
1328 | * suite. (That is, only 7-8% overall over just a hash cache. Still, |
1329 | * it's nothing to sniff at.) Pity we usually come through at least |
1330 | * two function calls to get here... |
1331 | * |
1332 | * NB: this code assumes that swatches are never modified, once generated! |
1333 | */ |
1334 | |
1335 | if (hv == PL_last_swash_hv && |
1336 | klen == PL_last_swash_klen && |
12ae5dfc |
1337 | (!klen || memEQ((char *)ptr,(char *)PL_last_swash_key,klen)) ) |
a0ed51b3 |
1338 | { |
1339 | tmps = PL_last_swash_tmps; |
1340 | slen = PL_last_swash_slen; |
1341 | } |
1342 | else { |
1343 | /* Try our second-level swatch cache, kept in a hash. */ |
dfe13c55 |
1344 | SV** svp = hv_fetch(hv, (char*)ptr, klen, FALSE); |
a0ed51b3 |
1345 | |
1346 | /* If not cached, generate it via utf8::SWASHGET */ |
dfe13c55 |
1347 | if (!svp || !SvPOK(*svp) || !(tmps = (U8*)SvPV(*svp, slen))) { |
a0ed51b3 |
1348 | dSP; |
2b9d42f0 |
1349 | /* We use utf8n_to_uvuni() as we want an index into |
1350 | Unicode tables, not a native character number. |
1351 | */ |
1352 | UV code_point = utf8n_to_uvuni(ptr, UTF8_MAXLEN, NULL, 0); |
a0ed51b3 |
1353 | ENTER; |
1354 | SAVETMPS; |
1355 | save_re_context(); |
1356 | PUSHSTACKi(PERLSI_MAGIC); |
1357 | PUSHMARK(SP); |
1358 | EXTEND(SP,3); |
1359 | PUSHs((SV*)sv); |
ffbc6a93 |
1360 | /* On EBCDIC & ~(0xA0-1) isn't a useful thing to do */ |
1361 | PUSHs(sv_2mortal(newSViv((klen) ? (code_point & ~(needents - 1)) : 0))); |
a0ed51b3 |
1362 | PUSHs(sv_2mortal(newSViv(needents))); |
1363 | PUTBACK; |
864dbfa3 |
1364 | if (call_method("SWASHGET", G_SCALAR)) |
8e84507e |
1365 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 |
1366 | else |
e24b16f9 |
1367 | retval = &PL_sv_undef; |
a0ed51b3 |
1368 | POPSTACK; |
1369 | FREETMPS; |
1370 | LEAVE; |
e24b16f9 |
1371 | if (PL_curcop == &PL_compiling) |
1372 | PL_curcop->op_private = PL_hints; |
a0ed51b3 |
1373 | |
dfe13c55 |
1374 | svp = hv_store(hv, (char*)ptr, klen, retval, 0); |
a0ed51b3 |
1375 | |
7d85a32c |
1376 | if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || (slen << 3) < needents) |
cea2e8a9 |
1377 | Perl_croak(aTHX_ "SWASHGET didn't return result of proper length"); |
a0ed51b3 |
1378 | } |
1379 | |
1380 | PL_last_swash_hv = hv; |
1381 | PL_last_swash_klen = klen; |
1382 | PL_last_swash_tmps = tmps; |
1383 | PL_last_swash_slen = slen; |
1384 | if (klen) |
1385 | Copy(ptr, PL_last_swash_key, klen, U8); |
1386 | } |
1387 | |
9faf8d75 |
1388 | switch ((int)((slen << 3) / needents)) { |
a0ed51b3 |
1389 | case 1: |
1390 | bit = 1 << (off & 7); |
1391 | off >>= 3; |
1392 | return (tmps[off] & bit) != 0; |
1393 | case 8: |
1394 | return tmps[off]; |
1395 | case 16: |
1396 | off <<= 1; |
1397 | return (tmps[off] << 8) + tmps[off + 1] ; |
1398 | case 32: |
1399 | off <<= 2; |
1400 | return (tmps[off] << 24) + (tmps[off+1] << 16) + (tmps[off+2] << 8) + tmps[off + 3] ; |
1401 | } |
cea2e8a9 |
1402 | Perl_croak(aTHX_ "panic: swash_fetch"); |
a0ed51b3 |
1403 | return 0; |
1404 | } |
2b9d42f0 |
1405 | |
1406 | |
1407 | /* |
37607a96 |
1408 | =for apidoc A|U8 *|uvchr_to_utf8|U8 *d|UV uv |
2b9d42f0 |
1409 | |
1410 | Adds the UTF8 representation of the Native codepoint C<uv> to the end |
1411 | of the string C<d>; C<d> should be have at least C<UTF8_MAXLEN+1> free |
1412 | bytes available. The return value is the pointer to the byte after the |
1413 | end of the new character. In other words, |
1414 | |
1415 | d = uvchr_to_utf8(d, uv); |
1416 | |
1417 | is the recommended wide native character-aware way of saying |
1418 | |
1419 | *(d++) = uv; |
1420 | |
1421 | =cut |
1422 | */ |
1423 | |
1424 | /* On ASCII machines this is normally a macro but we want a |
1425 | real function in case XS code wants it |
1426 | */ |
1427 | #undef Perl_uvchr_to_utf8 |
1428 | U8 * |
1429 | Perl_uvchr_to_utf8(pTHX_ U8 *d, UV uv) |
1430 | { |
1431 | return Perl_uvuni_to_utf8(aTHX_ d, NATIVE_TO_UNI(uv)); |
1432 | } |
1433 | |
1434 | |
1435 | /* |
37607a96 |
1436 | =for apidoc A|UV|utf8n_to_uvchr|U8 *s|STRLEN curlen|STRLEN *retlen|U32 flags |
2b9d42f0 |
1437 | |
1438 | Returns the native character value of the first character in the string C<s> |
1439 | which is assumed to be in UTF8 encoding; C<retlen> will be set to the |
1440 | length, in bytes, of that character. |
1441 | |
1442 | Allows length and flags to be passed to low level routine. |
1443 | |
1444 | =cut |
1445 | */ |
1446 | /* On ASCII machines this is normally a macro but we want a |
1447 | real function in case XS code wants it |
1448 | */ |
1449 | #undef Perl_utf8n_to_uvchr |
1450 | UV |
37607a96 |
1451 | Perl_utf8n_to_uvchr(pTHX_ U8 *s, STRLEN curlen, STRLEN *retlen, U32 flags) |
2b9d42f0 |
1452 | { |
1453 | UV uv = Perl_utf8n_to_uvuni(aTHX_ s, curlen, retlen, flags); |
1454 | return UNI_TO_NATIVE(uv); |
1455 | } |
1456 | |
1457 | |