Commit | Line | Data |
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a0ed51b3 LW |
1 | /* utf8.c |
2 | * | |
4eb8286e | 3 | * Copyright (c) 1998-1999, 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" | |
24 | #include "perl.h" | |
25 | ||
26 | /* Unicode support */ | |
27 | ||
dfe13c55 GS |
28 | U8 * |
29 | uv_to_utf8(U8 *d, UV uv) | |
a0ed51b3 LW |
30 | { |
31 | if (uv < 0x80) { | |
32 | *d++ = uv; | |
33 | return d; | |
34 | } | |
35 | if (uv < 0x800) { | |
36 | *d++ = (( uv >> 6) | 0xc0); | |
37 | *d++ = (( uv & 0x3f) | 0x80); | |
38 | return d; | |
39 | } | |
40 | if (uv < 0x10000) { | |
41 | *d++ = (( uv >> 12) | 0xe0); | |
42 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
43 | *d++ = (( uv & 0x3f) | 0x80); | |
44 | return d; | |
45 | } | |
46 | if (uv < 0x200000) { | |
47 | *d++ = (( uv >> 18) | 0xf0); | |
48 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
49 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
50 | *d++ = (( uv & 0x3f) | 0x80); | |
51 | return d; | |
52 | } | |
53 | if (uv < 0x4000000) { | |
54 | *d++ = (( uv >> 24) | 0xf8); | |
55 | *d++ = (((uv >> 18) & 0x3f) | 0x80); | |
56 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
57 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
58 | *d++ = (( uv & 0x3f) | 0x80); | |
59 | return d; | |
60 | } | |
61 | if (uv < 0x80000000) { | |
62 | *d++ = (( uv >> 30) | 0xfc); | |
63 | *d++ = (((uv >> 24) & 0x3f) | 0x80); | |
64 | *d++ = (((uv >> 18) & 0x3f) | 0x80); | |
65 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
66 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
67 | *d++ = (( uv & 0x3f) | 0x80); | |
68 | return d; | |
69 | } | |
70 | #ifdef Quad_t | |
71 | if (uv < 0x2000000000) | |
72 | #endif | |
73 | { | |
74 | *d++ = 0xfe; /* Can't match U+FEFF! */ | |
75 | *d++ = (((uv >> 30) & 0x3f) | 0x80); | |
76 | *d++ = (((uv >> 24) & 0x3f) | 0x80); | |
77 | *d++ = (((uv >> 18) & 0x3f) | 0x80); | |
78 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
79 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
80 | *d++ = (( uv & 0x3f) | 0x80); | |
81 | return d; | |
82 | } | |
83 | #ifdef Quad_t | |
84 | { | |
85 | *d++ = 0xff; /* Can't match U+FFFE! */ | |
86 | *d++ = (((uv >> 36) & 0x3f) | 0x80); | |
87 | *d++ = (((uv >> 30) & 0x3f) | 0x80); | |
88 | *d++ = (((uv >> 24) & 0x3f) | 0x80); | |
89 | *d++ = (((uv >> 18) & 0x3f) | 0x80); | |
90 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
91 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
92 | *d++ = (( uv & 0x3f) | 0x80); | |
93 | return d; | |
94 | } | |
95 | #endif | |
96 | } | |
97 | ||
98 | UV | |
dfe13c55 | 99 | utf8_to_uv(U8* s, I32* retlen) |
a0ed51b3 LW |
100 | { |
101 | UV uv = *s; | |
102 | int len; | |
103 | if (!(uv & 0x80)) { | |
104 | if (retlen) | |
105 | *retlen = 1; | |
106 | return *s; | |
107 | } | |
108 | if (!(uv & 0x40)) { | |
109 | warn("Malformed UTF-8 character"); | |
110 | if (retlen) | |
111 | *retlen = 1; | |
112 | return *s; | |
113 | } | |
114 | ||
115 | if (!(uv & 0x20)) { len = 2; uv &= 0x1f; } | |
116 | else if (!(uv & 0x10)) { len = 3; uv &= 0x0f; } | |
117 | else if (!(uv & 0x08)) { len = 4; uv &= 0x07; } | |
118 | else if (!(uv & 0x04)) { len = 5; uv &= 0x03; } | |
119 | else if (!(uv & 0x02)) { len = 6; uv &= 0x01; } | |
120 | else if (!(uv & 0x01)) { len = 7; uv &= 0x00; } | |
121 | else len = 8; /* whoa! */ | |
122 | ||
123 | if (retlen) | |
124 | *retlen = len; | |
125 | --len; | |
126 | s++; | |
127 | while (len--) { | |
128 | if ((*s & 0xc0) != 0x80) { | |
129 | warn("Malformed UTF-8 character"); | |
130 | if (retlen) | |
131 | *retlen -= len + 1; | |
132 | return 0xfffd; | |
133 | } | |
134 | else | |
135 | uv = (uv << 6) | (*s++ & 0x3f); | |
136 | } | |
137 | return uv; | |
138 | } | |
139 | ||
140 | /* utf8_distance(a,b) is intended to be a - b in pointer arithmetic */ | |
141 | ||
142 | I32 | |
dfe13c55 | 143 | utf8_distance(U8 *a, U8 *b) |
a0ed51b3 LW |
144 | { |
145 | I32 off = 0; | |
146 | if (a < b) { | |
147 | while (a < b) { | |
148 | a += UTF8SKIP(a); | |
149 | off--; | |
150 | } | |
151 | } | |
152 | else { | |
153 | while (b < a) { | |
154 | b += UTF8SKIP(b); | |
155 | off++; | |
156 | } | |
157 | } | |
158 | return off; | |
159 | } | |
160 | ||
161 | /* WARNING: do not use the following unless you *know* off is within bounds */ | |
162 | ||
163 | U8 * | |
dfe13c55 | 164 | utf8_hop(U8 *s, I32 off) |
a0ed51b3 LW |
165 | { |
166 | if (off >= 0) { | |
167 | while (off--) | |
168 | s += UTF8SKIP(s); | |
169 | } | |
170 | else { | |
171 | while (off++) { | |
172 | s--; | |
173 | if (*s & 0x80) { | |
174 | while ((*s & 0xc0) == 0x80) | |
175 | s--; | |
176 | } | |
177 | } | |
178 | } | |
179 | return s; | |
180 | } | |
181 | ||
182 | /* XXX NOTHING CALLS THE FOLLOWING TWO ROUTINES YET!!! */ | |
183 | /* | |
184 | * Convert native or reversed UTF-16 to UTF-8. | |
185 | * | |
186 | * Destination must be pre-extended to 3/2 source. Do not use in-place. | |
187 | * We optimize for native, for obvious reasons. */ | |
188 | ||
189 | U8* | |
190 | utf16_to_utf8(U16* p, U8* d, I32 bytelen) | |
191 | { | |
192 | U16* pend = p + bytelen / 2; | |
193 | while (p < pend) { | |
194 | UV uv = *p++; | |
195 | if (uv < 0x80) { | |
196 | *d++ = uv; | |
197 | continue; | |
198 | } | |
199 | if (uv < 0x800) { | |
200 | *d++ = (( uv >> 6) | 0xc0); | |
201 | *d++ = (( uv & 0x3f) | 0x80); | |
202 | continue; | |
203 | } | |
204 | if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */ | |
205 | int low = *p++; | |
206 | if (low < 0xdc00 || low >= 0xdfff) { | |
207 | warn("Malformed UTF-16 surrogate"); | |
208 | p--; | |
209 | uv = 0xfffd; | |
210 | } | |
211 | uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000; | |
212 | } | |
213 | if (uv < 0x10000) { | |
214 | *d++ = (( uv >> 12) | 0xe0); | |
215 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
216 | *d++ = (( uv & 0x3f) | 0x80); | |
217 | continue; | |
218 | } | |
219 | else { | |
220 | *d++ = (( uv >> 18) | 0xf0); | |
221 | *d++ = (((uv >> 12) & 0x3f) | 0x80); | |
222 | *d++ = (((uv >> 6) & 0x3f) | 0x80); | |
223 | *d++ = (( uv & 0x3f) | 0x80); | |
224 | continue; | |
225 | } | |
226 | } | |
227 | return d; | |
228 | } | |
229 | ||
230 | /* Note: this one is slightly destructive of the source. */ | |
231 | ||
232 | U8* | |
233 | utf16_to_utf8_reversed(U16* p, U8* d, I32 bytelen) | |
234 | { | |
235 | U8* s = (U8*)p; | |
236 | U8* send = s + bytelen; | |
237 | while (s < send) { | |
238 | U8 tmp = s[0]; | |
239 | s[0] = s[1]; | |
240 | s[1] = tmp; | |
241 | s += 2; | |
242 | } | |
243 | return utf16_to_utf8(p, d, bytelen); | |
244 | } | |
245 | ||
246 | /* for now these are all defined (inefficiently) in terms of the utf8 versions */ | |
247 | ||
248 | bool | |
249 | is_uni_alnum(U32 c) | |
250 | { | |
dfe13c55 | 251 | U8 tmpbuf[10]; |
a0ed51b3 LW |
252 | uv_to_utf8(tmpbuf, (UV)c); |
253 | return is_utf8_alnum(tmpbuf); | |
254 | } | |
255 | ||
256 | bool | |
257 | is_uni_idfirst(U32 c) | |
258 | { | |
dfe13c55 | 259 | U8 tmpbuf[10]; |
a0ed51b3 LW |
260 | uv_to_utf8(tmpbuf, (UV)c); |
261 | return is_utf8_idfirst(tmpbuf); | |
262 | } | |
263 | ||
264 | bool | |
265 | is_uni_alpha(U32 c) | |
266 | { | |
dfe13c55 | 267 | U8 tmpbuf[10]; |
a0ed51b3 LW |
268 | uv_to_utf8(tmpbuf, (UV)c); |
269 | return is_utf8_alpha(tmpbuf); | |
270 | } | |
271 | ||
272 | bool | |
273 | is_uni_space(U32 c) | |
274 | { | |
dfe13c55 | 275 | U8 tmpbuf[10]; |
a0ed51b3 LW |
276 | uv_to_utf8(tmpbuf, (UV)c); |
277 | return is_utf8_space(tmpbuf); | |
278 | } | |
279 | ||
280 | bool | |
281 | is_uni_digit(U32 c) | |
282 | { | |
dfe13c55 | 283 | U8 tmpbuf[10]; |
a0ed51b3 LW |
284 | uv_to_utf8(tmpbuf, (UV)c); |
285 | return is_utf8_digit(tmpbuf); | |
286 | } | |
287 | ||
288 | bool | |
289 | is_uni_upper(U32 c) | |
290 | { | |
dfe13c55 | 291 | U8 tmpbuf[10]; |
a0ed51b3 LW |
292 | uv_to_utf8(tmpbuf, (UV)c); |
293 | return is_utf8_upper(tmpbuf); | |
294 | } | |
295 | ||
296 | bool | |
297 | is_uni_lower(U32 c) | |
298 | { | |
dfe13c55 | 299 | U8 tmpbuf[10]; |
a0ed51b3 LW |
300 | uv_to_utf8(tmpbuf, (UV)c); |
301 | return is_utf8_lower(tmpbuf); | |
302 | } | |
303 | ||
304 | bool | |
305 | is_uni_print(U32 c) | |
306 | { | |
dfe13c55 | 307 | U8 tmpbuf[10]; |
a0ed51b3 LW |
308 | uv_to_utf8(tmpbuf, (UV)c); |
309 | return is_utf8_print(tmpbuf); | |
310 | } | |
311 | ||
312 | U32 | |
313 | to_uni_upper(U32 c) | |
314 | { | |
dfe13c55 | 315 | U8 tmpbuf[10]; |
a0ed51b3 LW |
316 | uv_to_utf8(tmpbuf, (UV)c); |
317 | return to_utf8_upper(tmpbuf); | |
318 | } | |
319 | ||
320 | U32 | |
321 | to_uni_title(U32 c) | |
322 | { | |
dfe13c55 | 323 | U8 tmpbuf[10]; |
a0ed51b3 LW |
324 | uv_to_utf8(tmpbuf, (UV)c); |
325 | return to_utf8_title(tmpbuf); | |
326 | } | |
327 | ||
328 | U32 | |
329 | to_uni_lower(U32 c) | |
330 | { | |
dfe13c55 | 331 | U8 tmpbuf[10]; |
a0ed51b3 LW |
332 | uv_to_utf8(tmpbuf, (UV)c); |
333 | return to_utf8_lower(tmpbuf); | |
334 | } | |
335 | ||
336 | /* for now these all assume no locale info available for Unicode > 255 */ | |
337 | ||
338 | bool | |
339 | is_uni_alnum_lc(U32 c) | |
340 | { | |
341 | return is_uni_alnum(c); /* XXX no locale support yet */ | |
342 | } | |
343 | ||
344 | bool | |
345 | is_uni_idfirst_lc(U32 c) | |
346 | { | |
347 | return is_uni_idfirst(c); /* XXX no locale support yet */ | |
348 | } | |
349 | ||
350 | bool | |
351 | is_uni_alpha_lc(U32 c) | |
352 | { | |
353 | return is_uni_alpha(c); /* XXX no locale support yet */ | |
354 | } | |
355 | ||
356 | bool | |
357 | is_uni_space_lc(U32 c) | |
358 | { | |
359 | return is_uni_space(c); /* XXX no locale support yet */ | |
360 | } | |
361 | ||
362 | bool | |
363 | is_uni_digit_lc(U32 c) | |
364 | { | |
365 | return is_uni_digit(c); /* XXX no locale support yet */ | |
366 | } | |
367 | ||
368 | bool | |
369 | is_uni_upper_lc(U32 c) | |
370 | { | |
371 | return is_uni_upper(c); /* XXX no locale support yet */ | |
372 | } | |
373 | ||
374 | bool | |
375 | is_uni_lower_lc(U32 c) | |
376 | { | |
377 | return is_uni_lower(c); /* XXX no locale support yet */ | |
378 | } | |
379 | ||
380 | bool | |
381 | is_uni_print_lc(U32 c) | |
382 | { | |
383 | return is_uni_print(c); /* XXX no locale support yet */ | |
384 | } | |
385 | ||
386 | U32 | |
387 | to_uni_upper_lc(U32 c) | |
388 | { | |
389 | return to_uni_upper(c); /* XXX no locale support yet */ | |
390 | } | |
391 | ||
392 | U32 | |
393 | to_uni_title_lc(U32 c) | |
394 | { | |
395 | return to_uni_title(c); /* XXX no locale support yet */ | |
396 | } | |
397 | ||
398 | U32 | |
399 | to_uni_lower_lc(U32 c) | |
400 | { | |
401 | return to_uni_lower(c); /* XXX no locale support yet */ | |
402 | } | |
403 | ||
404 | ||
405 | bool | |
dfe13c55 | 406 | is_utf8_alnum(U8 *p) |
a0ed51b3 LW |
407 | { |
408 | if (!PL_utf8_alnum) | |
e24b16f9 | 409 | PL_utf8_alnum = swash_init("utf8", "IsAlnum", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
410 | return swash_fetch(PL_utf8_alnum, p); |
411 | /* return *p == '_' || is_utf8_alpha(p) || is_utf8_digit(p); */ | |
412 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ | |
413 | if (!PL_utf8_alnum) | |
414 | PL_utf8_alnum = swash_init("utf8", "", | |
415 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); | |
416 | return swash_fetch(PL_utf8_alnum, p); | |
417 | #endif | |
418 | } | |
419 | ||
420 | bool | |
dfe13c55 | 421 | is_utf8_idfirst(U8 *p) |
a0ed51b3 LW |
422 | { |
423 | return *p == '_' || is_utf8_alpha(p); | |
424 | } | |
425 | ||
426 | bool | |
dfe13c55 | 427 | is_utf8_alpha(U8 *p) |
a0ed51b3 LW |
428 | { |
429 | if (!PL_utf8_alpha) | |
e24b16f9 | 430 | PL_utf8_alpha = swash_init("utf8", "IsAlpha", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
431 | return swash_fetch(PL_utf8_alpha, p); |
432 | } | |
433 | ||
434 | bool | |
dfe13c55 | 435 | is_utf8_space(U8 *p) |
a0ed51b3 LW |
436 | { |
437 | if (!PL_utf8_space) | |
e24b16f9 | 438 | PL_utf8_space = swash_init("utf8", "IsSpace", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
439 | return swash_fetch(PL_utf8_space, p); |
440 | } | |
441 | ||
442 | bool | |
dfe13c55 | 443 | is_utf8_digit(U8 *p) |
a0ed51b3 LW |
444 | { |
445 | if (!PL_utf8_digit) | |
e24b16f9 | 446 | PL_utf8_digit = swash_init("utf8", "IsDigit", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
447 | return swash_fetch(PL_utf8_digit, p); |
448 | } | |
449 | ||
450 | bool | |
dfe13c55 | 451 | is_utf8_upper(U8 *p) |
a0ed51b3 LW |
452 | { |
453 | if (!PL_utf8_upper) | |
e24b16f9 | 454 | PL_utf8_upper = swash_init("utf8", "IsUpper", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
455 | return swash_fetch(PL_utf8_upper, p); |
456 | } | |
457 | ||
458 | bool | |
dfe13c55 | 459 | is_utf8_lower(U8 *p) |
a0ed51b3 LW |
460 | { |
461 | if (!PL_utf8_lower) | |
e24b16f9 | 462 | PL_utf8_lower = swash_init("utf8", "IsLower", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
463 | return swash_fetch(PL_utf8_lower, p); |
464 | } | |
465 | ||
466 | bool | |
dfe13c55 | 467 | is_utf8_print(U8 *p) |
a0ed51b3 LW |
468 | { |
469 | if (!PL_utf8_print) | |
e24b16f9 | 470 | PL_utf8_print = swash_init("utf8", "IsPrint", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
471 | return swash_fetch(PL_utf8_print, p); |
472 | } | |
473 | ||
474 | bool | |
dfe13c55 | 475 | is_utf8_mark(U8 *p) |
a0ed51b3 LW |
476 | { |
477 | if (!PL_utf8_mark) | |
e24b16f9 | 478 | PL_utf8_mark = swash_init("utf8", "IsM", &PL_sv_undef, 0, 0); |
a0ed51b3 LW |
479 | return swash_fetch(PL_utf8_mark, p); |
480 | } | |
481 | ||
2104c8d9 | 482 | UV |
dfe13c55 | 483 | to_utf8_upper(U8 *p) |
a0ed51b3 LW |
484 | { |
485 | UV uv; | |
486 | ||
487 | if (!PL_utf8_toupper) | |
e24b16f9 | 488 | PL_utf8_toupper = swash_init("utf8", "ToUpper", &PL_sv_undef, 4, 0); |
a0ed51b3 LW |
489 | uv = swash_fetch(PL_utf8_toupper, p); |
490 | return uv ? uv : utf8_to_uv(p,0); | |
491 | } | |
492 | ||
2104c8d9 | 493 | UV |
dfe13c55 | 494 | to_utf8_title(U8 *p) |
a0ed51b3 LW |
495 | { |
496 | UV uv; | |
497 | ||
498 | if (!PL_utf8_totitle) | |
e24b16f9 | 499 | PL_utf8_totitle = swash_init("utf8", "ToTitle", &PL_sv_undef, 4, 0); |
a0ed51b3 LW |
500 | uv = swash_fetch(PL_utf8_totitle, p); |
501 | return uv ? uv : utf8_to_uv(p,0); | |
502 | } | |
503 | ||
2104c8d9 | 504 | UV |
dfe13c55 | 505 | to_utf8_lower(U8 *p) |
a0ed51b3 LW |
506 | { |
507 | UV uv; | |
508 | ||
509 | if (!PL_utf8_tolower) | |
e24b16f9 | 510 | PL_utf8_tolower = swash_init("utf8", "ToLower", &PL_sv_undef, 4, 0); |
a0ed51b3 LW |
511 | uv = swash_fetch(PL_utf8_tolower, p); |
512 | return uv ? uv : utf8_to_uv(p,0); | |
513 | } | |
514 | ||
515 | /* a "swash" is a swatch hash */ | |
516 | ||
517 | SV* | |
518 | swash_init(char* pkg, char* name, SV *listsv, I32 minbits, I32 none) | |
519 | { | |
520 | SV* retval; | |
521 | char tmpbuf[256]; | |
522 | dSP; | |
523 | PUSHSTACKi(PERLSI_MAGIC); | |
524 | PUSHMARK(SP); | |
525 | EXTEND(SP,5); | |
526 | PUSHs(sv_2mortal(newSVpvn(pkg, strlen(pkg)))); | |
527 | PUSHs(sv_2mortal(newSVpvn(name, strlen(name)))); | |
528 | PUSHs(listsv); | |
529 | PUSHs(sv_2mortal(newSViv(minbits))); | |
530 | PUSHs(sv_2mortal(newSViv(none))); | |
531 | PUTBACK; | |
532 | ENTER; | |
533 | SAVEI32(PL_hints); | |
534 | PL_hints = 0; | |
535 | save_re_context(); | |
e24b16f9 | 536 | if (PL_curcop == &PL_compiling) /* XXX ought to be handled by lex_start */ |
a0ed51b3 LW |
537 | strncpy(tmpbuf, PL_tokenbuf, sizeof tmpbuf); |
538 | if (perl_call_method("SWASHNEW", G_SCALAR)) | |
e24b16f9 | 539 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 | 540 | else |
e24b16f9 | 541 | retval = &PL_sv_undef; |
a0ed51b3 LW |
542 | LEAVE; |
543 | POPSTACK; | |
e24b16f9 | 544 | if (PL_curcop == &PL_compiling) { |
a0ed51b3 | 545 | strncpy(PL_tokenbuf, tmpbuf, sizeof tmpbuf); |
e24b16f9 | 546 | PL_curcop->op_private = PL_hints; |
a0ed51b3 LW |
547 | } |
548 | if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV) | |
549 | croak("SWASHNEW didn't return an HV ref"); | |
550 | return retval; | |
551 | } | |
552 | ||
553 | UV | |
dfe13c55 | 554 | swash_fetch(SV *sv, U8 *ptr) |
a0ed51b3 LW |
555 | { |
556 | HV* hv = (HV*)SvRV(sv); | |
557 | U32 klen = UTF8SKIP(ptr) - 1; | |
558 | U32 off = ptr[klen] & 127; /* NB: 64 bit always 0 when len > 1 */ | |
559 | STRLEN slen; | |
560 | STRLEN needents = (klen ? 64 : 128); | |
dfe13c55 | 561 | U8 *tmps; |
a0ed51b3 LW |
562 | U32 bit; |
563 | SV *retval; | |
564 | ||
565 | /* | |
566 | * This single-entry cache saves about 1/3 of the utf8 overhead in test | |
567 | * suite. (That is, only 7-8% overall over just a hash cache. Still, | |
568 | * it's nothing to sniff at.) Pity we usually come through at least | |
569 | * two function calls to get here... | |
570 | * | |
571 | * NB: this code assumes that swatches are never modified, once generated! | |
572 | */ | |
573 | ||
574 | if (hv == PL_last_swash_hv && | |
575 | klen == PL_last_swash_klen && | |
576 | (!klen || memEQ(ptr,PL_last_swash_key,klen)) ) | |
577 | { | |
578 | tmps = PL_last_swash_tmps; | |
579 | slen = PL_last_swash_slen; | |
580 | } | |
581 | else { | |
582 | /* Try our second-level swatch cache, kept in a hash. */ | |
dfe13c55 | 583 | SV** svp = hv_fetch(hv, (char*)ptr, klen, FALSE); |
a0ed51b3 LW |
584 | |
585 | /* If not cached, generate it via utf8::SWASHGET */ | |
dfe13c55 | 586 | if (!svp || !SvPOK(*svp) || !(tmps = (U8*)SvPV(*svp, slen))) { |
a0ed51b3 LW |
587 | dSP; |
588 | ENTER; | |
589 | SAVETMPS; | |
590 | save_re_context(); | |
591 | PUSHSTACKi(PERLSI_MAGIC); | |
592 | PUSHMARK(SP); | |
593 | EXTEND(SP,3); | |
594 | PUSHs((SV*)sv); | |
595 | PUSHs(sv_2mortal(newSViv(utf8_to_uv(ptr, 0) & ~(needents - 1)))); | |
596 | PUSHs(sv_2mortal(newSViv(needents))); | |
597 | PUTBACK; | |
598 | if (perl_call_method("SWASHGET", G_SCALAR)) | |
e24b16f9 | 599 | retval = newSVsv(*PL_stack_sp--); |
a0ed51b3 | 600 | else |
e24b16f9 | 601 | retval = &PL_sv_undef; |
a0ed51b3 LW |
602 | POPSTACK; |
603 | FREETMPS; | |
604 | LEAVE; | |
e24b16f9 GS |
605 | if (PL_curcop == &PL_compiling) |
606 | PL_curcop->op_private = PL_hints; | |
a0ed51b3 | 607 | |
dfe13c55 | 608 | svp = hv_store(hv, (char*)ptr, klen, retval, 0); |
a0ed51b3 | 609 | |
dfe13c55 | 610 | if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || slen < 8) |
a0ed51b3 LW |
611 | croak("SWASHGET didn't return result of proper length"); |
612 | } | |
613 | ||
614 | PL_last_swash_hv = hv; | |
615 | PL_last_swash_klen = klen; | |
616 | PL_last_swash_tmps = tmps; | |
617 | PL_last_swash_slen = slen; | |
618 | if (klen) | |
619 | Copy(ptr, PL_last_swash_key, klen, U8); | |
620 | } | |
621 | ||
622 | switch ((slen << 3) / needents) { | |
623 | case 1: | |
624 | bit = 1 << (off & 7); | |
625 | off >>= 3; | |
626 | return (tmps[off] & bit) != 0; | |
627 | case 8: | |
628 | return tmps[off]; | |
629 | case 16: | |
630 | off <<= 1; | |
631 | return (tmps[off] << 8) + tmps[off + 1] ; | |
632 | case 32: | |
633 | off <<= 2; | |
634 | return (tmps[off] << 24) + (tmps[off+1] << 16) + (tmps[off+2] << 8) + tmps[off + 3] ; | |
635 | } | |
636 | croak("panic: swash_fetch"); | |
637 | return 0; | |
638 | } |