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