Commit | Line | Data |
---|---|---|
a0ed51b3 LW |
1 | /* utf8.c |
2 | * | |
3818b22b | 3 | * Copyright (c) 1998-2000, Larry Wall |
a0ed51b3 LW |
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 LW |
25 | #include "perl.h" |
26 | ||
27 | /* Unicode support */ | |
28 | ||
dfe13c55 | 29 | U8 * |
864dbfa3 | 30 | Perl_uv_to_utf8(pTHX_ U8 *d, UV uv) |
a0ed51b3 LW |
31 | { |
32 | if (uv < 0x80) { | |
33 | *d++ = uv; | |
34 | return d; | |
35 | } | |
36 | if (uv < 0x800) { | |
37 | *d++ = (( uv >> 6) | 0xc0); | |
38 | *d++ = (( uv & 0x3f) | 0x80); | |
39 | return d; | |
40 | } | |
41 | if (uv < 0x10000) { | |
42 | *d++ = (( uv >> 12) | 0xe0); | |
43 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
44 | *d++ = (( uv & 0x3f) | 0x80); | |
45 | return d; | |
46 | } | |
47 | if (uv < 0x200000) { | |
48 | *d++ = (( uv >> 18) | 0xf0); | |
49 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
50 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
51 | *d++ = (( uv & 0x3f) | 0x80); | |
52 | return d; | |
53 | } | |
54 | if (uv < 0x4000000) { | |
55 | *d++ = (( uv >> 24) | 0xf8); | |
56 | *d++ = (((uv >> 18) & 0x3f) | 0x80); | |
57 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
58 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
59 | *d++ = (( uv & 0x3f) | 0x80); | |
60 | return d; | |
61 | } | |
62 | if (uv < 0x80000000) { | |
63 | *d++ = (( uv >> 30) | 0xfc); | |
64 | *d++ = (((uv >> 24) & 0x3f) | 0x80); | |
65 | *d++ = (((uv >> 18) & 0x3f) | 0x80); | |
66 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
67 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
68 | *d++ = (( uv & 0x3f) | 0x80); | |
69 | return d; | |
70 | } | |
6b8eaf93 | 71 | #ifdef HAS_QUAD |
d7578b48 | 72 | if (uv < UTF8_QUAD_MAX) |
a0ed51b3 LW |
73 | #endif |
74 | { | |
75 | *d++ = 0xfe; /* Can't match U+FEFF! */ | |
76 | *d++ = (((uv >> 30) & 0x3f) | 0x80); | |
77 | *d++ = (((uv >> 24) & 0x3f) | 0x80); | |
78 | *d++ = (((uv >> 18) & 0x3f) | 0x80); | |
79 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
80 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
81 | *d++ = (( uv & 0x3f) | 0x80); | |
82 | return d; | |
83 | } | |
6b8eaf93 | 84 | #ifdef HAS_QUAD |
a0ed51b3 LW |
85 | { |
86 | *d++ = 0xff; /* Can't match U+FFFE! */ | |
3c77ea2b GS |
87 | *d++ = 0x80; /* 6 Reserved bits */ |
88 | *d++ = (((uv >> 60) & 0x0f) | 0x80); /* 2 Reserved bits */ | |
89 | *d++ = (((uv >> 54) & 0x3f) | 0x80); | |
90 | *d++ = (((uv >> 48) & 0x3f) | 0x80); | |
91 | *d++ = (((uv >> 42) & 0x3f) | 0x80); | |
a0ed51b3 LW |
92 | *d++ = (((uv >> 36) & 0x3f) | 0x80); |
93 | *d++ = (((uv >> 30) & 0x3f) | 0x80); | |
94 | *d++ = (((uv >> 24) & 0x3f) | 0x80); | |
95 | *d++ = (((uv >> 18) & 0x3f) | 0x80); | |
96 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
97 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
98 | *d++ = (( uv & 0x3f) | 0x80); | |
99 | return d; | |
100 | } | |
101 | #endif | |
102 | } | |
103 | ||
386d01d6 GS |
104 | /* Tests if some arbitrary number of bytes begins in a valid UTF-8 character. |
105 | * The actual number of bytes in the UTF-8 character will be returned if it | |
106 | * is valid, otherwise 0. */ | |
067a85ef | 107 | STRLEN |
386d01d6 GS |
108 | Perl_is_utf8_char(pTHX_ U8 *s) |
109 | { | |
110 | U8 u = *s; | |
067a85ef A |
111 | STRLEN slen, len; |
112 | UV uv, ouv; | |
386d01d6 | 113 | |
067a85ef | 114 | if (u <= 0x7f) |
386d01d6 GS |
115 | return 1; |
116 | ||
067a85ef | 117 | if (u >= 0x80 && u <= 0xbf) |
386d01d6 GS |
118 | return 0; |
119 | ||
9f07fdcd | 120 | len = UTF8SKIP(s); |
386d01d6 | 121 | |
067a85ef A |
122 | if (len < 2 || (u >= 0xc0 && u <= 0xfd && s[1] < 0x80)) |
123 | return 0; | |
124 | ||
386d01d6 GS |
125 | slen = len - 1; |
126 | s++; | |
067a85ef A |
127 | uv = u; |
128 | ouv = uv; | |
386d01d6 GS |
129 | while (slen--) { |
130 | if ((*s & 0xc0) != 0x80) | |
131 | return 0; | |
067a85ef A |
132 | uv = (uv << 6) | (*s & 0x3f); |
133 | if (uv < ouv) | |
134 | return 0; | |
135 | ouv = uv; | |
386d01d6 GS |
136 | s++; |
137 | } | |
067a85ef | 138 | |
5bbb0b5a | 139 | if (UNISKIP(uv) < len) |
067a85ef A |
140 | return 0; |
141 | ||
386d01d6 GS |
142 | return len; |
143 | } | |
144 | ||
6662521e | 145 | /* |
b2a2e44b | 146 | =for apidoc Am|is_utf8_string|U8 *s|STRLEN len |
6662521e GS |
147 | |
148 | Returns true if first C<len> bytes of the given string form valid a UTF8 | |
149 | string, false otherwise. | |
150 | ||
151 | =cut | |
152 | */ | |
153 | ||
8e84507e | 154 | bool |
6662521e GS |
155 | Perl_is_utf8_string(pTHX_ U8 *s, STRLEN len) |
156 | { | |
067a85ef A |
157 | U8* x = s; |
158 | U8* send = s + len; | |
159 | STRLEN c; | |
160 | ||
6662521e GS |
161 | while (x < send) { |
162 | c = is_utf8_char(x); | |
067a85ef A |
163 | if (!c) |
164 | return FALSE; | |
6662521e | 165 | x += c; |
067a85ef A |
166 | if (x > send) |
167 | return FALSE; | |
6662521e | 168 | } |
067a85ef A |
169 | |
170 | return TRUE; | |
6662521e GS |
171 | } |
172 | ||
67e989fb | 173 | /* |
be2c7115 | 174 | =for apidoc Am|U8* s|utf8_to_uv|STRLEN curlen|STRLEN *retlen|U32 flags |
67e989fb JH |
175 | |
176 | Returns the character value of the first character in the string C<s> | |
ba210ebe JH |
177 | which is assumed to be in UTF8 encoding and no longer than C<curlen>; |
178 | C<retlen> will be set to the length, in bytes, of that character, | |
179 | and the pointer C<s> will be advanced to the end of the character. | |
67e989fb JH |
180 | |
181 | If C<s> does not point to a well-formed UTF8 character, the behaviour | |
dcad2880 JH |
182 | is dependent on the value of C<flags>: if it contains UTF8_CHECK_ONLY, |
183 | it is assumed that the caller will raise a warning, and this function | |
184 | will set C<retlen> to C<-1> and return. The C<flags> can also contain | |
be2c7115 PP |
185 | various flags to allow deviations from the strict UTF-8 encoding |
186 | (see F<utf8.h>). | |
67e989fb | 187 | |
dcad2880 | 188 | =cut */ |
67e989fb | 189 | |
a0ed51b3 | 190 | UV |
dcad2880 | 191 | Perl_utf8_to_uv(pTHX_ U8* s, STRLEN curlen, STRLEN* retlen, U32 flags) |
a0ed51b3 | 192 | { |
ba210ebe JH |
193 | dTHR; |
194 | UV uv = *s, ouv; | |
195 | STRLEN len = 1; | |
7bf1b6bb PP |
196 | #ifdef EBCDIC |
197 | bool dowarn = 0; | |
198 | #else | |
ba210ebe | 199 | bool dowarn = ckWARN_d(WARN_UTF8); |
7bf1b6bb | 200 | #endif |
ba210ebe JH |
201 | STRLEN expectlen = 0; |
202 | ||
0c443dc2 JH |
203 | if (curlen == 0) { |
204 | if (dowarn) | |
205 | Perl_warner(aTHX_ WARN_UTF8, | |
206 | "Malformed UTF-8 character (an empty string)"); | |
207 | goto malformed; | |
208 | } | |
209 | ||
ba210ebe | 210 | if (uv <= 0x7f) { /* Pure ASCII. */ |
a0ed51b3 LW |
211 | if (retlen) |
212 | *retlen = 1; | |
213 | return *s; | |
214 | } | |
67e989fb | 215 | |
fcc8fcf6 JH |
216 | if ((uv >= 0x80 && uv <= 0xbf) && |
217 | !(flags & UTF8_ALLOW_CONTINUATION)) { | |
ba210ebe JH |
218 | if (dowarn) |
219 | Perl_warner(aTHX_ WARN_UTF8, | |
efbcad09 | 220 | "Malformed UTF-8 character (unexpected continuation byte 0x%02"UVxf")", |
ba210ebe JH |
221 | uv); |
222 | goto malformed; | |
223 | } | |
224 | ||
0c443dc2 | 225 | if ((uv >= 0xc0 && uv <= 0xfd && curlen > 1 && s[1] < 0x80) && |
fcc8fcf6 | 226 | !(flags & UTF8_ALLOW_NON_CONTINUATION)) { |
ba210ebe JH |
227 | if (dowarn) |
228 | Perl_warner(aTHX_ WARN_UTF8, | |
efbcad09 | 229 | "Malformed UTF-8 character (unexpected non-continuation byte 0x%02"UVxf" after byte 0x%02"UVxf")", |
9e29e5ff | 230 | (UV)s[1], uv); |
ba210ebe JH |
231 | goto malformed; |
232 | } | |
fcc8fcf6 JH |
233 | |
234 | if ((uv == 0xfe || uv == 0xff) && | |
235 | !(flags & UTF8_ALLOW_FE_FF)) { | |
ba210ebe JH |
236 | if (dowarn) |
237 | Perl_warner(aTHX_ WARN_UTF8, | |
efbcad09 | 238 | "Malformed UTF-8 character (byte 0x%02"UVxf")", |
ba210ebe JH |
239 | uv); |
240 | goto malformed; | |
a0ed51b3 | 241 | } |
fcc8fcf6 | 242 | |
ba210ebe JH |
243 | if (!(uv & 0x20)) { len = 2; uv &= 0x1f; } |
244 | else if (!(uv & 0x10)) { len = 3; uv &= 0x0f; } | |
245 | else if (!(uv & 0x08)) { len = 4; uv &= 0x07; } | |
246 | else if (!(uv & 0x04)) { len = 5; uv &= 0x03; } | |
247 | else if (!(uv & 0x02)) { len = 6; uv &= 0x01; } | |
248 | else if (!(uv & 0x01)) { len = 7; uv = 0; } | |
3c77ea2b | 249 | else { len = 13; uv = 0; } /* whoa! */ |
fcc8fcf6 | 250 | |
a0ed51b3 LW |
251 | if (retlen) |
252 | *retlen = len; | |
ba210ebe JH |
253 | |
254 | expectlen = len; | |
255 | ||
fcc8fcf6 JH |
256 | if ((curlen < expectlen) && |
257 | !(flags & UTF8_ALLOW_SHORT)) { | |
ba210ebe JH |
258 | if (dowarn) |
259 | Perl_warner(aTHX_ WARN_UTF8, | |
260 | "Malformed UTF-8 character (%d byte%s, need %d)", | |
0c443dc2 | 261 | curlen, curlen == 1 ? "" : "s", expectlen); |
ba210ebe JH |
262 | goto malformed; |
263 | } | |
264 | ||
265 | len--; | |
a0ed51b3 | 266 | s++; |
ba210ebe JH |
267 | ouv = uv; |
268 | ||
a0ed51b3 LW |
269 | while (len--) { |
270 | if ((*s & 0xc0) != 0x80) { | |
ba210ebe JH |
271 | if (dowarn) |
272 | Perl_warner(aTHX_ WARN_UTF8, | |
273 | "Malformed UTF-8 character (unexpected continuation byte 0x%02x)", | |
274 | *s); | |
275 | goto malformed; | |
a0ed51b3 LW |
276 | } |
277 | else | |
ba210ebe JH |
278 | uv = (uv << 6) | (*s & 0x3f); |
279 | if (uv < ouv) { | |
fcc8fcf6 | 280 | /* This cannot be allowed. */ |
ba210ebe JH |
281 | if (dowarn) |
282 | Perl_warner(aTHX_ WARN_UTF8, | |
283 | "Malformed UTF-8 character (overflow at 0x%"UVxf", byte 0x%02x)", | |
284 | ouv, *s); | |
285 | goto malformed; | |
286 | } | |
287 | s++; | |
288 | ouv = uv; | |
289 | } | |
290 | ||
fcc8fcf6 JH |
291 | if ((uv >= 0xd800 && uv <= 0xdfff) && |
292 | !(flags & UTF8_ALLOW_SURROGATE)) { | |
ba210ebe JH |
293 | if (dowarn) |
294 | Perl_warner(aTHX_ WARN_UTF8, | |
295 | "Malformed UTF-8 character (UTF-16 surrogate 0x%04"UVxf")", | |
296 | uv); | |
297 | goto malformed; | |
fcc8fcf6 JH |
298 | } else if ((uv == 0xfffe) && |
299 | !(flags & UTF8_ALLOW_BOM)) { | |
ba210ebe JH |
300 | if (dowarn) |
301 | Perl_warner(aTHX_ WARN_UTF8, | |
302 | "Malformed UTF-8 character (byte order mark 0x%04"UVxf")", | |
303 | uv); | |
304 | goto malformed; | |
fcc8fcf6 JH |
305 | } else if ((uv == 0xffff) && |
306 | !(flags & UTF8_ALLOW_FFFF)) { | |
ba210ebe JH |
307 | if (dowarn) |
308 | Perl_warner(aTHX_ WARN_UTF8, | |
fcc8fcf6 | 309 | "Malformed UTF-8 character (character 0x%04"UVxf")", |
ba210ebe JH |
310 | uv); |
311 | goto malformed; | |
fcc8fcf6 JH |
312 | } else if ((expectlen > UNISKIP(uv)) && |
313 | !(flags & UTF8_ALLOW_LONG)) { | |
ba210ebe JH |
314 | if (dowarn) |
315 | Perl_warner(aTHX_ WARN_UTF8, | |
316 | "Malformed UTF-8 character (%d byte%s, need %d)", | |
0c443dc2 | 317 | expectlen, expectlen == 1 ? "": "s", UNISKIP(uv)); |
ba210ebe | 318 | goto malformed; |
a0ed51b3 | 319 | } |
ba210ebe | 320 | |
a0ed51b3 | 321 | return uv; |
ba210ebe JH |
322 | |
323 | malformed: | |
324 | ||
fcc8fcf6 | 325 | if (flags & UTF8_CHECK_ONLY) { |
ba210ebe | 326 | if (retlen) |
cc366d4b | 327 | *retlen = -1; |
ba210ebe JH |
328 | return 0; |
329 | } | |
330 | ||
331 | if (retlen) | |
cc366d4b | 332 | *retlen = expectlen ? expectlen : len; |
ba210ebe JH |
333 | |
334 | return UNICODE_REPLACEMENT_CHARACTER; | |
a0ed51b3 LW |
335 | } |
336 | ||
8e84507e | 337 | /* |
dcad2880 | 338 | =for apidoc Am|U8* s|utf8_to_uv_simple|STRLEN *retlen |
8e84507e NIS |
339 | |
340 | Returns the character value of the first character in the string C<s> | |
341 | which is assumed to be in UTF8 encoding; C<retlen> will be set to the | |
342 | length, in bytes, of that character, and the pointer C<s> will be | |
343 | advanced to the end of the character. | |
344 | ||
ba210ebe JH |
345 | If C<s> does not point to a well-formed UTF8 character, zero is |
346 | returned and retlen is set, if possible, to -1. | |
8e84507e NIS |
347 | |
348 | =cut | |
349 | */ | |
350 | ||
351 | UV | |
dcad2880 | 352 | Perl_utf8_to_uv_simple(pTHX_ U8* s, STRLEN* retlen) |
8e84507e | 353 | { |
2e4dc9fc | 354 | return Perl_utf8_to_uv(aTHX_ s, UTF8_MAXLEN, retlen, 0); |
8e84507e NIS |
355 | } |
356 | ||
b76347f2 JH |
357 | /* |
358 | =for apidoc|utf8_length|U8 *s|U8 *e | |
359 | ||
360 | Return the length of the UTF-8 char encoded string C<s> in characters. | |
02eb7b47 JH |
361 | Stops at C<e> (inclusive). If C<e E<lt> s> or if the scan would end |
362 | up past C<e>, croaks. | |
b76347f2 JH |
363 | |
364 | =cut | |
365 | */ | |
366 | ||
367 | STRLEN | |
368 | Perl_utf8_length(pTHX_ U8* s, U8* e) | |
369 | { | |
370 | STRLEN len = 0; | |
371 | ||
372 | if (e < s) | |
02eb7b47 | 373 | Perl_croak(aTHX_ "panic: utf8_length: unexpected end"); |
b76347f2 | 374 | while (s < e) { |
02eb7b47 | 375 | U8 t = UTF8SKIP(s); |
b76347f2 JH |
376 | |
377 | if (e - s < t) | |
02eb7b47 | 378 | Perl_croak(aTHX_ "panic: utf8_length: unaligned end"); |
b76347f2 JH |
379 | s += t; |
380 | len++; | |
381 | } | |
382 | ||
383 | return len; | |
384 | } | |
385 | ||
246fae53 MG |
386 | /* utf8_distance(a,b) returns the number of UTF8 characters between |
387 | the pointers a and b */ | |
a0ed51b3 | 388 | |
02eb7b47 | 389 | IV |
864dbfa3 | 390 | Perl_utf8_distance(pTHX_ U8 *a, U8 *b) |
a0ed51b3 | 391 | { |
02eb7b47 JH |
392 | IV off = 0; |
393 | ||
a0ed51b3 LW |
394 | if (a < b) { |
395 | while (a < b) { | |
02eb7b47 JH |
396 | U8 c = UTF8SKIP(a); |
397 | ||
398 | if (b - a < c) | |
399 | Perl_croak(aTHX_ "panic: utf8_distance: unaligned end"); | |
400 | a += c; | |
a0ed51b3 LW |
401 | off--; |
402 | } | |
403 | } | |
404 | else { | |
405 | while (b < a) { | |
02eb7b47 JH |
406 | U8 c = UTF8SKIP(b); |
407 | ||
408 | if (a - b < c) | |
409 | Perl_croak(aTHX_ "panic: utf8_distance: unaligned end"); | |
410 | b += c; | |
a0ed51b3 LW |
411 | off++; |
412 | } | |
413 | } | |
02eb7b47 | 414 | |
a0ed51b3 LW |
415 | return off; |
416 | } | |
417 | ||
418 | /* WARNING: do not use the following unless you *know* off is within bounds */ | |
419 | ||
420 | U8 * | |
864dbfa3 | 421 | Perl_utf8_hop(pTHX_ U8 *s, I32 off) |
a0ed51b3 LW |
422 | { |
423 | if (off >= 0) { | |
424 | while (off--) | |
425 | s += UTF8SKIP(s); | |
426 | } | |
427 | else { | |
428 | while (off++) { | |
429 | s--; | |
430 | if (*s & 0x80) { | |
431 | while ((*s & 0xc0) == 0x80) | |
432 | s--; | |
433 | } | |
434 | } | |
435 | } | |
436 | return s; | |
437 | } | |
438 | ||
6940069f | 439 | /* |
246fae53 | 440 | =for apidoc Am|U8 *|utf8_to_bytes|U8 *s|STRLEN *len |
6940069f | 441 | |
246fae53 MG |
442 | Converts a string C<s> of length C<len> from UTF8 into byte encoding. |
443 | Unlike C<bytes_to_utf8>, this over-writes the original string, and | |
444 | updates len to contain the new length. | |
67e989fb | 445 | Returns zero on failure, setting C<len> to -1. |
6940069f GS |
446 | |
447 | =cut | |
448 | */ | |
449 | ||
450 | U8 * | |
246fae53 | 451 | Perl_utf8_to_bytes(pTHX_ U8* s, STRLEN *len) |
6940069f | 452 | { |
6940069f GS |
453 | U8 *send; |
454 | U8 *d; | |
dcad2880 | 455 | U8 *save = s; |
246fae53 MG |
456 | |
457 | /* ensure valid UTF8 and chars < 256 before updating string */ | |
dcad2880 JH |
458 | for (send = s + *len; s < send; ) { |
459 | U8 c = *s++; | |
460 | ||
9f9ab905 | 461 | if (c >= 0x80 && |
dcad2880 JH |
462 | ((s >= send) || |
463 | ((*s++ & 0xc0) != 0x80) || ((c & 0xfe) != 0xc2))) { | |
464 | *len = -1; | |
465 | return 0; | |
466 | } | |
246fae53 | 467 | } |
dcad2880 JH |
468 | |
469 | d = s = save; | |
6940069f | 470 | while (s < send) { |
dcad2880 JH |
471 | if (*s < 0x80) { |
472 | *d++ = *s++; | |
473 | } | |
6940069f | 474 | else { |
ba210ebe | 475 | STRLEN ulen; |
dcad2880 | 476 | *d++ = (U8)utf8_to_uv_simple(s, &ulen); |
6940069f | 477 | s += ulen; |
6940069f GS |
478 | } |
479 | } | |
480 | *d = '\0'; | |
246fae53 | 481 | *len = d - save; |
6940069f GS |
482 | return save; |
483 | } | |
484 | ||
485 | /* | |
6662521e | 486 | =for apidoc Am|U8 *|bytes_to_utf8|U8 *s|STRLEN *len |
6940069f GS |
487 | |
488 | Converts a string C<s> of length C<len> from ASCII into UTF8 encoding. | |
6662521e GS |
489 | Returns a pointer to the newly-created string, and sets C<len> to |
490 | reflect the new length. | |
6940069f | 491 | |
497711e7 | 492 | =cut |
6940069f GS |
493 | */ |
494 | ||
495 | U8* | |
6662521e | 496 | Perl_bytes_to_utf8(pTHX_ U8* s, STRLEN *len) |
6940069f GS |
497 | { |
498 | dTHR; | |
499 | U8 *send; | |
500 | U8 *d; | |
501 | U8 *dst; | |
6662521e | 502 | send = s + (*len); |
6940069f | 503 | |
6662521e | 504 | Newz(801, d, (*len) * 2 + 1, U8); |
6940069f GS |
505 | dst = d; |
506 | ||
507 | while (s < send) { | |
508 | if (*s < 0x80) | |
509 | *d++ = *s++; | |
510 | else { | |
511 | UV uv = *s++; | |
512 | *d++ = (( uv >> 6) | 0xc0); | |
513 | *d++ = (( uv & 0x3f) | 0x80); | |
514 | } | |
515 | } | |
516 | *d = '\0'; | |
6662521e | 517 | *len = d-dst; |
6940069f GS |
518 | return dst; |
519 | } | |
520 | ||
a0ed51b3 | 521 | /* |
dea0fc0b | 522 | * Convert native (big-endian) or reversed (little-endian) UTF-16 to UTF-8. |
a0ed51b3 LW |
523 | * |
524 | * Destination must be pre-extended to 3/2 source. Do not use in-place. | |
525 | * We optimize for native, for obvious reasons. */ | |
526 | ||
527 | U8* | |
dea0fc0b | 528 | Perl_utf16_to_utf8(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 | 529 | { |
dea0fc0b JH |
530 | U8* pend; |
531 | U8* dstart = d; | |
532 | ||
533 | if (bytelen & 1) | |
a7867d0a | 534 | Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen"); |
dea0fc0b JH |
535 | |
536 | pend = p + bytelen; | |
537 | ||
a0ed51b3 | 538 | while (p < pend) { |
dea0fc0b JH |
539 | UV uv = (p[0] << 8) + p[1]; /* UTF-16BE */ |
540 | p += 2; | |
a0ed51b3 LW |
541 | if (uv < 0x80) { |
542 | *d++ = uv; | |
543 | continue; | |
544 | } | |
545 | if (uv < 0x800) { | |
546 | *d++ = (( uv >> 6) | 0xc0); | |
547 | *d++ = (( uv & 0x3f) | 0x80); | |
548 | continue; | |
549 | } | |
550 | if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */ | |
0453d815 | 551 | dTHR; |
dea0fc0b JH |
552 | UV low = *p++; |
553 | if (low < 0xdc00 || low >= 0xdfff) | |
554 | Perl_croak(aTHX_ "Malformed UTF-16 surrogate"); | |
a0ed51b3 LW |
555 | uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000; |
556 | } | |
557 | if (uv < 0x10000) { | |
558 | *d++ = (( uv >> 12) | 0xe0); | |
559 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
560 | *d++ = (( uv & 0x3f) | 0x80); | |
561 | continue; | |
562 | } | |
563 | else { | |
564 | *d++ = (( uv >> 18) | 0xf0); | |
565 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
566 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
567 | *d++ = (( uv & 0x3f) | 0x80); | |
568 | continue; | |
569 | } | |
570 | } | |
dea0fc0b | 571 | *newlen = d - dstart; |
a0ed51b3 LW |
572 | return d; |
573 | } | |
574 | ||
575 | /* Note: this one is slightly destructive of the source. */ | |
576 | ||
577 | U8* | |
dea0fc0b | 578 | Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
a0ed51b3 LW |
579 | { |
580 | U8* s = (U8*)p; | |
581 | U8* send = s + bytelen; | |
582 | while (s < send) { | |
583 | U8 tmp = s[0]; | |
584 | s[0] = s[1]; | |
585 | s[1] = tmp; | |
586 | s += 2; | |
587 | } | |
dea0fc0b | 588 | return utf16_to_utf8(p, d, bytelen, newlen); |
a0ed51b3 LW |
589 | } |
590 | ||
591 | /* for now these are all defined (inefficiently) in terms of the utf8 versions */ | |
592 | ||
593 | bool | |
864dbfa3 | 594 | Perl_is_uni_alnum(pTHX_ U32 c) |
a0ed51b3 | 595 | { |
aa6ffa16 | 596 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 LW |
597 | uv_to_utf8(tmpbuf, (UV)c); |
598 | return is_utf8_alnum(tmpbuf); | |
599 | } | |
600 | ||
601 | bool | |
b8c5462f JH |
602 | Perl_is_uni_alnumc(pTHX_ U32 c) |
603 | { | |
aa6ffa16 | 604 | U8 tmpbuf[UTF8_MAXLEN]; |
b8c5462f JH |
605 | uv_to_utf8(tmpbuf, (UV)c); |
606 | return is_utf8_alnumc(tmpbuf); | |
607 | } | |
608 | ||
609 | bool | |
864dbfa3 | 610 | Perl_is_uni_idfirst(pTHX_ U32 c) |
a0ed51b3 | 611 | { |
aa6ffa16 | 612 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 LW |
613 | uv_to_utf8(tmpbuf, (UV)c); |
614 | return is_utf8_idfirst(tmpbuf); | |
615 | } | |
616 | ||
617 | bool | |
864dbfa3 | 618 | Perl_is_uni_alpha(pTHX_ U32 c) |
a0ed51b3 | 619 | { |
aa6ffa16 | 620 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 LW |
621 | uv_to_utf8(tmpbuf, (UV)c); |
622 | return is_utf8_alpha(tmpbuf); | |
623 | } | |
624 | ||
625 | bool | |
4d61ec05 GS |
626 | Perl_is_uni_ascii(pTHX_ U32 c) |
627 | { | |
aa6ffa16 | 628 | U8 tmpbuf[UTF8_MAXLEN]; |
4d61ec05 GS |
629 | uv_to_utf8(tmpbuf, (UV)c); |
630 | return is_utf8_ascii(tmpbuf); | |
631 | } | |
632 | ||
633 | bool | |
864dbfa3 | 634 | Perl_is_uni_space(pTHX_ U32 c) |
a0ed51b3 | 635 | { |
aa6ffa16 | 636 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 LW |
637 | uv_to_utf8(tmpbuf, (UV)c); |
638 | return is_utf8_space(tmpbuf); | |
639 | } | |
640 | ||
641 | bool | |
864dbfa3 | 642 | Perl_is_uni_digit(pTHX_ U32 c) |
a0ed51b3 | 643 | { |
aa6ffa16 | 644 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 LW |
645 | uv_to_utf8(tmpbuf, (UV)c); |
646 | return is_utf8_digit(tmpbuf); | |
647 | } | |
648 | ||
649 | bool | |
864dbfa3 | 650 | Perl_is_uni_upper(pTHX_ U32 c) |
a0ed51b3 | 651 | { |
aa6ffa16 | 652 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 LW |
653 | uv_to_utf8(tmpbuf, (UV)c); |
654 | return is_utf8_upper(tmpbuf); | |
655 | } | |
656 | ||
657 | bool | |
864dbfa3 | 658 | Perl_is_uni_lower(pTHX_ U32 c) |
a0ed51b3 | 659 | { |
aa6ffa16 | 660 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 LW |
661 | uv_to_utf8(tmpbuf, (UV)c); |
662 | return is_utf8_lower(tmpbuf); | |
663 | } | |
664 | ||
665 | bool | |
b8c5462f JH |
666 | Perl_is_uni_cntrl(pTHX_ U32 c) |
667 | { | |
aa6ffa16 | 668 | U8 tmpbuf[UTF8_MAXLEN]; |
b8c5462f JH |
669 | uv_to_utf8(tmpbuf, (UV)c); |
670 | return is_utf8_cntrl(tmpbuf); | |
671 | } | |
672 | ||
673 | bool | |
674 | Perl_is_uni_graph(pTHX_ U32 c) | |
675 | { | |
aa6ffa16 | 676 | U8 tmpbuf[UTF8_MAXLEN]; |
b8c5462f JH |
677 | uv_to_utf8(tmpbuf, (UV)c); |
678 | return is_utf8_graph(tmpbuf); | |
679 | } | |
680 | ||
681 | bool | |
864dbfa3 | 682 | Perl_is_uni_print(pTHX_ U32 c) |
a0ed51b3 | 683 | { |
aa6ffa16 | 684 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 LW |
685 | uv_to_utf8(tmpbuf, (UV)c); |
686 | return is_utf8_print(tmpbuf); | |
687 | } | |
688 | ||
b8c5462f | 689 | bool |
f248d071 | 690 | Perl_is_uni_punct(pTHX_ U32 c) |
b8c5462f | 691 | { |
aa6ffa16 | 692 | U8 tmpbuf[UTF8_MAXLEN]; |
b8c5462f JH |
693 | uv_to_utf8(tmpbuf, (UV)c); |
694 | return is_utf8_punct(tmpbuf); | |
695 | } | |
696 | ||
4d61ec05 GS |
697 | bool |
698 | Perl_is_uni_xdigit(pTHX_ U32 c) | |
699 | { | |
aa6ffa16 | 700 | U8 tmpbuf[UTF8_MAXLEN]; |
4d61ec05 GS |
701 | uv_to_utf8(tmpbuf, (UV)c); |
702 | return is_utf8_xdigit(tmpbuf); | |
703 | } | |
704 | ||
a0ed51b3 | 705 | U32 |
864dbfa3 | 706 | Perl_to_uni_upper(pTHX_ U32 c) |
a0ed51b3 | 707 | { |
aa6ffa16 | 708 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 LW |
709 | uv_to_utf8(tmpbuf, (UV)c); |
710 | return to_utf8_upper(tmpbuf); | |
711 | } | |
712 | ||
713 | U32 | |
864dbfa3 | 714 | Perl_to_uni_title(pTHX_ U32 c) |
a0ed51b3 | 715 | { |
aa6ffa16 | 716 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 LW |
717 | uv_to_utf8(tmpbuf, (UV)c); |
718 | return to_utf8_title(tmpbuf); | |
719 | } | |
720 | ||
721 | U32 | |
864dbfa3 | 722 | Perl_to_uni_lower(pTHX_ U32 c) |
a0ed51b3 | 723 | { |
aa6ffa16 | 724 | U8 tmpbuf[UTF8_MAXLEN]; |
a0ed51b3 LW |
725 | uv_to_utf8(tmpbuf, (UV)c); |
726 | return to_utf8_lower(tmpbuf); | |
727 | } | |
728 | ||
729 | /* for now these all assume no locale info available for Unicode > 255 */ | |
730 | ||
731 | bool | |
864dbfa3 | 732 | Perl_is_uni_alnum_lc(pTHX_ U32 c) |
a0ed51b3 LW |
733 | { |
734 | return is_uni_alnum(c); /* XXX no locale support yet */ | |
735 | } | |
736 | ||
737 | bool | |
b8c5462f JH |
738 | Perl_is_uni_alnumc_lc(pTHX_ U32 c) |
739 | { | |
740 | return is_uni_alnumc(c); /* XXX no locale support yet */ | |
741 | } | |
742 | ||
743 | bool | |
864dbfa3 | 744 | Perl_is_uni_idfirst_lc(pTHX_ U32 c) |
a0ed51b3 LW |
745 | { |
746 | return is_uni_idfirst(c); /* XXX no locale support yet */ | |
747 | } | |
748 | ||
749 | bool | |
864dbfa3 | 750 | Perl_is_uni_alpha_lc(pTHX_ U32 c) |
a0ed51b3 LW |
751 | { |
752 | return is_uni_alpha(c); /* XXX no locale support yet */ | |
753 | } | |
754 | ||
755 | bool | |
4d61ec05 GS |
756 | Perl_is_uni_ascii_lc(pTHX_ U32 c) |
757 | { | |
758 | return is_uni_ascii(c); /* XXX no locale support yet */ | |
759 | } | |
760 | ||
761 | bool | |
864dbfa3 | 762 | Perl_is_uni_space_lc(pTHX_ U32 c) |
a0ed51b3 LW |
763 | { |
764 | return is_uni_space(c); /* XXX no locale support yet */ | |
765 | } | |
766 | ||
767 | bool | |
864dbfa3 | 768 | Perl_is_uni_digit_lc(pTHX_ U32 c) |
a0ed51b3 LW |
769 | { |
770 | return is_uni_digit(c); /* XXX no locale support yet */ | |
771 | } | |
772 | ||
773 | bool | |
864dbfa3 | 774 | Perl_is_uni_upper_lc(pTHX_ U32 c) |
a0ed51b3 LW |
775 | { |
776 | return is_uni_upper(c); /* XXX no locale support yet */ | |
777 | } | |
778 | ||
779 | bool | |
864dbfa3 | 780 | Perl_is_uni_lower_lc(pTHX_ U32 c) |
a0ed51b3 LW |
781 | { |
782 | return is_uni_lower(c); /* XXX no locale support yet */ | |
783 | } | |
784 | ||
785 | bool | |
b8c5462f JH |
786 | Perl_is_uni_cntrl_lc(pTHX_ U32 c) |
787 | { | |
788 | return is_uni_cntrl(c); /* XXX no locale support yet */ | |
789 | } | |
790 | ||
791 | bool | |
792 | Perl_is_uni_graph_lc(pTHX_ U32 c) | |
793 | { | |
794 | return is_uni_graph(c); /* XXX no locale support yet */ | |
795 | } | |
796 | ||
797 | bool | |
864dbfa3 | 798 | Perl_is_uni_print_lc(pTHX_ U32 c) |
a0ed51b3 LW |
799 | { |
800 | return is_uni_print(c); /* XXX no locale support yet */ | |
801 | } | |
802 | ||
b8c5462f JH |
803 | bool |
804 | Perl_is_uni_punct_lc(pTHX_ U32 c) | |
805 | { | |
806 | return is_uni_punct(c); /* XXX no locale support yet */ | |
807 | } | |
808 | ||
4d61ec05 GS |
809 | bool |
810 | Perl_is_uni_xdigit_lc(pTHX_ U32 c) | |
811 | { | |
812 | return is_uni_xdigit(c); /* XXX no locale support yet */ | |
813 | } | |
814 | ||
a0ed51b3 | 815 | U32 |
864dbfa3 | 816 | Perl_to_uni_upper_lc(pTHX_ U32 c) |
a0ed51b3 LW |
817 | { |
818 | return to_uni_upper(c); /* XXX no locale support yet */ | |
819 | } | |
820 | ||
821 | U32 | |
864dbfa3 | 822 | Perl_to_uni_title_lc(pTHX_ U32 c) |
a0ed51b3 LW |
823 | { |
824 | return to_uni_title(c); /* XXX no locale support yet */ | |
825 | } | |
826 | ||
827 | U32 | |
864dbfa3 | 828 | Perl_to_uni_lower_lc(pTHX_ U32 c) |
a0ed51b3 LW |
829 | { |
830 | return to_uni_lower(c); /* XXX no locale support yet */ | |
831 | } | |
832 | ||
a0ed51b3 | 833 | bool |
864dbfa3 | 834 | Perl_is_utf8_alnum(pTHX_ U8 *p) |
a0ed51b3 | 835 | { |
386d01d6 GS |
836 | if (!is_utf8_char(p)) |
837 | return FALSE; | |
a0ed51b3 | 838 | if (!PL_utf8_alnum) |
289d4f09 ML |
839 | /* NOTE: "IsWord", not "IsAlnum", since Alnum is a true |
840 | * descendant of isalnum(3), in other words, it doesn't | |
841 | * contain the '_'. --jhi */ | |
842 | PL_utf8_alnum = swash_init("utf8", "IsWord", &PL_sv_undef, 0, 0); | |
a0ed51b3 LW |
843 | return swash_fetch(PL_utf8_alnum, p); |
844 | /* return *p == '_' || is_utf8_alpha(p) || is_utf8_digit(p); */ | |
845 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ | |
846 | if (!PL_utf8_alnum) | |
847 | PL_utf8_alnum = swash_init("utf8", "", | |
848 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); | |
849 | return swash_fetch(PL_utf8_alnum, p); | |
850 | #endif | |
851 | } | |
852 | ||
853 | bool | |
b8c5462f JH |
854 | Perl_is_utf8_alnumc(pTHX_ U8 *p) |
855 | { | |
386d01d6 GS |
856 | if (!is_utf8_char(p)) |
857 | return FALSE; | |
b8c5462f JH |
858 | if (!PL_utf8_alnum) |
859 | PL_utf8_alnum = swash_init("utf8", "IsAlnumC", &PL_sv_undef, 0, 0); | |
860 | return swash_fetch(PL_utf8_alnum, p); | |
861 | /* return is_utf8_alpha(p) || is_utf8_digit(p); */ | |
862 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ | |
863 | if (!PL_utf8_alnum) | |
864 | PL_utf8_alnum = swash_init("utf8", "", | |
865 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); | |
866 | return swash_fetch(PL_utf8_alnum, p); | |
867 | #endif | |
868 | } | |
869 | ||
870 | bool | |
864dbfa3 | 871 | Perl_is_utf8_idfirst(pTHX_ U8 *p) |
a0ed51b3 LW |
872 | { |
873 | return *p == '_' || is_utf8_alpha(p); | |
874 | } | |
875 | ||
876 | bool | |
864dbfa3 | 877 | Perl_is_utf8_alpha(pTHX_ U8 *p) |
a0ed51b3 | 878 | { |
386d01d6 GS |
879 | if (!is_utf8_char(p)) |
880 | return FALSE; | |
a0ed51b3 | 881 | if (!PL_utf8_alpha) |
e24b16f9 | 882 | PL_utf8_alpha = swash_init("utf8", "IsAlpha", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
883 | return swash_fetch(PL_utf8_alpha, p); |
884 | } | |
885 | ||
886 | bool | |
b8c5462f JH |
887 | Perl_is_utf8_ascii(pTHX_ U8 *p) |
888 | { | |
386d01d6 GS |
889 | if (!is_utf8_char(p)) |
890 | return FALSE; | |
b8c5462f JH |
891 | if (!PL_utf8_ascii) |
892 | PL_utf8_ascii = swash_init("utf8", "IsAscii", &PL_sv_undef, 0, 0); | |
893 | return swash_fetch(PL_utf8_ascii, p); | |
894 | } | |
895 | ||
896 | bool | |
864dbfa3 | 897 | Perl_is_utf8_space(pTHX_ U8 *p) |
a0ed51b3 | 898 | { |
386d01d6 GS |
899 | if (!is_utf8_char(p)) |
900 | return FALSE; | |
a0ed51b3 | 901 | if (!PL_utf8_space) |
3bec3564 | 902 | PL_utf8_space = swash_init("utf8", "IsSpacePerl", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
903 | return swash_fetch(PL_utf8_space, p); |
904 | } | |
905 | ||
906 | bool | |
864dbfa3 | 907 | Perl_is_utf8_digit(pTHX_ U8 *p) |
a0ed51b3 | 908 | { |
386d01d6 GS |
909 | if (!is_utf8_char(p)) |
910 | return FALSE; | |
a0ed51b3 | 911 | if (!PL_utf8_digit) |
e24b16f9 | 912 | PL_utf8_digit = swash_init("utf8", "IsDigit", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
913 | return swash_fetch(PL_utf8_digit, p); |
914 | } | |
915 | ||
916 | bool | |
864dbfa3 | 917 | Perl_is_utf8_upper(pTHX_ U8 *p) |
a0ed51b3 | 918 | { |
386d01d6 GS |
919 | if (!is_utf8_char(p)) |
920 | return FALSE; | |
a0ed51b3 | 921 | if (!PL_utf8_upper) |
e24b16f9 | 922 | PL_utf8_upper = swash_init("utf8", "IsUpper", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
923 | return swash_fetch(PL_utf8_upper, p); |
924 | } | |
925 | ||
926 | bool | |
864dbfa3 | 927 | Perl_is_utf8_lower(pTHX_ U8 *p) |
a0ed51b3 | 928 | { |
386d01d6 GS |
929 | if (!is_utf8_char(p)) |
930 | return FALSE; | |
a0ed51b3 | 931 | if (!PL_utf8_lower) |
e24b16f9 | 932 | PL_utf8_lower = swash_init("utf8", "IsLower", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
933 | return swash_fetch(PL_utf8_lower, p); |
934 | } | |
935 | ||
936 | bool | |
b8c5462f JH |
937 | Perl_is_utf8_cntrl(pTHX_ U8 *p) |
938 | { | |
386d01d6 GS |
939 | if (!is_utf8_char(p)) |
940 | return FALSE; | |
b8c5462f JH |
941 | if (!PL_utf8_cntrl) |
942 | PL_utf8_cntrl = swash_init("utf8", "IsCntrl", &PL_sv_undef, 0, 0); | |
943 | return swash_fetch(PL_utf8_cntrl, p); | |
944 | } | |
945 | ||
946 | bool | |
947 | Perl_is_utf8_graph(pTHX_ U8 *p) | |
948 | { | |
386d01d6 GS |
949 | if (!is_utf8_char(p)) |
950 | return FALSE; | |
b8c5462f JH |
951 | if (!PL_utf8_graph) |
952 | PL_utf8_graph = swash_init("utf8", "IsGraph", &PL_sv_undef, 0, 0); | |
953 | return swash_fetch(PL_utf8_graph, p); | |
954 | } | |
955 | ||
956 | bool | |
864dbfa3 | 957 | Perl_is_utf8_print(pTHX_ U8 *p) |
a0ed51b3 | 958 | { |
386d01d6 GS |
959 | if (!is_utf8_char(p)) |
960 | return FALSE; | |
a0ed51b3 | 961 | if (!PL_utf8_print) |
e24b16f9 | 962 | PL_utf8_print = swash_init("utf8", "IsPrint", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
963 | return swash_fetch(PL_utf8_print, p); |
964 | } | |
965 | ||
966 | bool | |
b8c5462f JH |
967 | Perl_is_utf8_punct(pTHX_ U8 *p) |
968 | { | |
386d01d6 GS |
969 | if (!is_utf8_char(p)) |
970 | return FALSE; | |
b8c5462f JH |
971 | if (!PL_utf8_punct) |
972 | PL_utf8_punct = swash_init("utf8", "IsPunct", &PL_sv_undef, 0, 0); | |
973 | return swash_fetch(PL_utf8_punct, p); | |
974 | } | |
975 | ||
976 | bool | |
977 | Perl_is_utf8_xdigit(pTHX_ U8 *p) | |
978 | { | |
386d01d6 GS |
979 | if (!is_utf8_char(p)) |
980 | return FALSE; | |
b8c5462f JH |
981 | if (!PL_utf8_xdigit) |
982 | PL_utf8_xdigit = swash_init("utf8", "IsXDigit", &PL_sv_undef, 0, 0); | |
983 | return swash_fetch(PL_utf8_xdigit, p); | |
984 | } | |
985 | ||
986 | bool | |
864dbfa3 | 987 | Perl_is_utf8_mark(pTHX_ U8 *p) |
a0ed51b3 | 988 | { |
386d01d6 GS |
989 | if (!is_utf8_char(p)) |
990 | return FALSE; | |
a0ed51b3 | 991 | if (!PL_utf8_mark) |
e24b16f9 | 992 | PL_utf8_mark = swash_init("utf8", "IsM", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
993 | return swash_fetch(PL_utf8_mark, p); |
994 | } | |
995 | ||
2104c8d9 | 996 | UV |
864dbfa3 | 997 | Perl_to_utf8_upper(pTHX_ U8 *p) |
a0ed51b3 LW |
998 | { |
999 | UV uv; | |
1000 | ||
1001 | if (!PL_utf8_toupper) | |
e24b16f9 | 1002 | PL_utf8_toupper = swash_init("utf8", "ToUpper", &PL_sv_undef, 4, 0); |
a0ed51b3 | 1003 | uv = swash_fetch(PL_utf8_toupper, p); |
756820e3 | 1004 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
a0ed51b3 LW |
1005 | } |
1006 | ||
2104c8d9 | 1007 | UV |
864dbfa3 | 1008 | Perl_to_utf8_title(pTHX_ U8 *p) |
a0ed51b3 LW |
1009 | { |
1010 | UV uv; | |
1011 | ||
1012 | if (!PL_utf8_totitle) | |
e24b16f9 | 1013 | PL_utf8_totitle = swash_init("utf8", "ToTitle", &PL_sv_undef, 4, 0); |
a0ed51b3 | 1014 | uv = swash_fetch(PL_utf8_totitle, p); |
756820e3 | 1015 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
a0ed51b3 LW |
1016 | } |
1017 | ||
2104c8d9 | 1018 | UV |
864dbfa3 | 1019 | Perl_to_utf8_lower(pTHX_ U8 *p) |
a0ed51b3 LW |
1020 | { |
1021 | UV uv; | |
1022 | ||
1023 | if (!PL_utf8_tolower) | |
e24b16f9 | 1024 | PL_utf8_tolower = swash_init("utf8", "ToLower", &PL_sv_undef, 4, 0); |
a0ed51b3 | 1025 | uv = swash_fetch(PL_utf8_tolower, p); |
756820e3 | 1026 | return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0); |
a0ed51b3 LW |
1027 | } |
1028 | ||
1029 | /* a "swash" is a swatch hash */ | |
1030 | ||
1031 | SV* | |
864dbfa3 | 1032 | Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none) |
a0ed51b3 LW |
1033 | { |
1034 | SV* retval; | |
1035 | char tmpbuf[256]; | |
8e84507e | 1036 | dSP; |
ce3b816e GS |
1037 | |
1038 | if (!gv_stashpv(pkg, 0)) { /* demand load utf8 */ | |
1039 | ENTER; | |
1040 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpv(pkg,0), Nullsv); | |
1041 | LEAVE; | |
1042 | } | |
1043 | SPAGAIN; | |
a0ed51b3 LW |
1044 | PUSHSTACKi(PERLSI_MAGIC); |
1045 | PUSHMARK(SP); | |
1046 | EXTEND(SP,5); | |
1047 | PUSHs(sv_2mortal(newSVpvn(pkg, strlen(pkg)))); | |
1048 | PUSHs(sv_2mortal(newSVpvn(name, strlen(name)))); | |
1049 | PUSHs(listsv); | |
1050 | PUSHs(sv_2mortal(newSViv(minbits))); | |
1051 | PUSHs(sv_2mortal(newSViv(none))); | |
1052 | PUTBACK; | |
1053 | ENTER; | |
1054 | SAVEI32(PL_hints); | |
1055 | PL_hints = 0; | |
1056 | save_re_context(); | |
e24b16f9 | 1057 | if (PL_curcop == &PL_compiling) /* XXX ought to be handled by lex_start */ |
a0ed51b3 | 1058 | strncpy(tmpbuf, PL_tokenbuf, sizeof tmpbuf); |
864dbfa3 | 1059 | if (call_method("SWASHNEW", G_SCALAR)) |
8e84507e | 1060 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 | 1061 | else |
e24b16f9 | 1062 | retval = &PL_sv_undef; |
a0ed51b3 LW |
1063 | LEAVE; |
1064 | POPSTACK; | |
e24b16f9 | 1065 | if (PL_curcop == &PL_compiling) { |
a0ed51b3 | 1066 | strncpy(PL_tokenbuf, tmpbuf, sizeof tmpbuf); |
e24b16f9 | 1067 | PL_curcop->op_private = PL_hints; |
a0ed51b3 LW |
1068 | } |
1069 | if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV) | |
cea2e8a9 | 1070 | Perl_croak(aTHX_ "SWASHNEW didn't return an HV ref"); |
a0ed51b3 LW |
1071 | return retval; |
1072 | } | |
1073 | ||
1074 | UV | |
864dbfa3 | 1075 | Perl_swash_fetch(pTHX_ SV *sv, U8 *ptr) |
a0ed51b3 LW |
1076 | { |
1077 | HV* hv = (HV*)SvRV(sv); | |
1078 | U32 klen = UTF8SKIP(ptr) - 1; | |
1079 | U32 off = ptr[klen] & 127; /* NB: 64 bit always 0 when len > 1 */ | |
1080 | STRLEN slen; | |
1081 | STRLEN needents = (klen ? 64 : 128); | |
dfe13c55 | 1082 | U8 *tmps; |
a0ed51b3 LW |
1083 | U32 bit; |
1084 | SV *retval; | |
1085 | ||
1086 | /* | |
1087 | * This single-entry cache saves about 1/3 of the utf8 overhead in test | |
1088 | * suite. (That is, only 7-8% overall over just a hash cache. Still, | |
1089 | * it's nothing to sniff at.) Pity we usually come through at least | |
1090 | * two function calls to get here... | |
1091 | * | |
1092 | * NB: this code assumes that swatches are never modified, once generated! | |
1093 | */ | |
1094 | ||
1095 | if (hv == PL_last_swash_hv && | |
1096 | klen == PL_last_swash_klen && | |
12ae5dfc | 1097 | (!klen || memEQ((char *)ptr,(char *)PL_last_swash_key,klen)) ) |
a0ed51b3 LW |
1098 | { |
1099 | tmps = PL_last_swash_tmps; | |
1100 | slen = PL_last_swash_slen; | |
1101 | } | |
1102 | else { | |
1103 | /* Try our second-level swatch cache, kept in a hash. */ | |
dfe13c55 | 1104 | SV** svp = hv_fetch(hv, (char*)ptr, klen, FALSE); |
a0ed51b3 LW |
1105 | |
1106 | /* If not cached, generate it via utf8::SWASHGET */ | |
dfe13c55 | 1107 | if (!svp || !SvPOK(*svp) || !(tmps = (U8*)SvPV(*svp, slen))) { |
a0ed51b3 LW |
1108 | dSP; |
1109 | ENTER; | |
1110 | SAVETMPS; | |
1111 | save_re_context(); | |
1112 | PUSHSTACKi(PERLSI_MAGIC); | |
1113 | PUSHMARK(SP); | |
1114 | EXTEND(SP,3); | |
1115 | PUSHs((SV*)sv); | |
756820e3 | 1116 | PUSHs(sv_2mortal(newSViv(utf8_to_uv(ptr, UTF8_MAXLEN, 0, 0) & ~(needents - 1)))); |
a0ed51b3 LW |
1117 | PUSHs(sv_2mortal(newSViv(needents))); |
1118 | PUTBACK; | |
864dbfa3 | 1119 | if (call_method("SWASHGET", G_SCALAR)) |
8e84507e | 1120 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 | 1121 | else |
e24b16f9 | 1122 | retval = &PL_sv_undef; |
a0ed51b3 LW |
1123 | POPSTACK; |
1124 | FREETMPS; | |
1125 | LEAVE; | |
e24b16f9 GS |
1126 | if (PL_curcop == &PL_compiling) |
1127 | PL_curcop->op_private = PL_hints; | |
a0ed51b3 | 1128 | |
dfe13c55 | 1129 | svp = hv_store(hv, (char*)ptr, klen, retval, 0); |
a0ed51b3 | 1130 | |
dfe13c55 | 1131 | if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || slen < 8) |
cea2e8a9 | 1132 | Perl_croak(aTHX_ "SWASHGET didn't return result of proper length"); |
a0ed51b3 LW |
1133 | } |
1134 | ||
1135 | PL_last_swash_hv = hv; | |
1136 | PL_last_swash_klen = klen; | |
1137 | PL_last_swash_tmps = tmps; | |
1138 | PL_last_swash_slen = slen; | |
1139 | if (klen) | |
1140 | Copy(ptr, PL_last_swash_key, klen, U8); | |
1141 | } | |
1142 | ||
9faf8d75 | 1143 | switch ((int)((slen << 3) / needents)) { |
a0ed51b3 LW |
1144 | case 1: |
1145 | bit = 1 << (off & 7); | |
1146 | off >>= 3; | |
1147 | return (tmps[off] & bit) != 0; | |
1148 | case 8: | |
1149 | return tmps[off]; | |
1150 | case 16: | |
1151 | off <<= 1; | |
1152 | return (tmps[off] << 8) + tmps[off + 1] ; | |
1153 | case 32: | |
1154 | off <<= 2; | |
1155 | return (tmps[off] << 24) + (tmps[off+1] << 16) + (tmps[off+2] << 8) + tmps[off + 3] ; | |
1156 | } | |
cea2e8a9 | 1157 | Perl_croak(aTHX_ "panic: swash_fetch"); |
a0ed51b3 LW |
1158 | return 0; |
1159 | } |