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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 29U8 *
ad391ad9 30Perl_uv_to_utf8(pTHX_ U8 *d, UV uv) /* the d must be UTF8_MAXLEN+1 deep */
a0ed51b3
LW
31{
32 if (uv < 0x80) {
33 *d++ = uv;
ad391ad9 34 *d = 0;
a0ed51b3
LW
35 return d;
36 }
37 if (uv < 0x800) {
38 *d++ = (( uv >> 6) | 0xc0);
39 *d++ = (( uv & 0x3f) | 0x80);
ad391ad9 40 *d = 0;
a0ed51b3
LW
41 return d;
42 }
43 if (uv < 0x10000) {
44 *d++ = (( uv >> 12) | 0xe0);
45 *d++ = (((uv >> 6) & 0x3f) | 0x80);
46 *d++ = (( uv & 0x3f) | 0x80);
ad391ad9 47 *d = 0;
a0ed51b3
LW
48 return d;
49 }
50 if (uv < 0x200000) {
51 *d++ = (( uv >> 18) | 0xf0);
52 *d++ = (((uv >> 12) & 0x3f) | 0x80);
53 *d++ = (((uv >> 6) & 0x3f) | 0x80);
54 *d++ = (( uv & 0x3f) | 0x80);
ad391ad9 55 *d = 0;
a0ed51b3
LW
56 return d;
57 }
58 if (uv < 0x4000000) {
59 *d++ = (( uv >> 24) | 0xf8);
60 *d++ = (((uv >> 18) & 0x3f) | 0x80);
61 *d++ = (((uv >> 12) & 0x3f) | 0x80);
62 *d++ = (((uv >> 6) & 0x3f) | 0x80);
63 *d++ = (( uv & 0x3f) | 0x80);
ad391ad9 64 *d = 0;
a0ed51b3
LW
65 return d;
66 }
67 if (uv < 0x80000000) {
68 *d++ = (( uv >> 30) | 0xfc);
69 *d++ = (((uv >> 24) & 0x3f) | 0x80);
70 *d++ = (((uv >> 18) & 0x3f) | 0x80);
71 *d++ = (((uv >> 12) & 0x3f) | 0x80);
72 *d++ = (((uv >> 6) & 0x3f) | 0x80);
73 *d++ = (( uv & 0x3f) | 0x80);
ad391ad9 74 *d = 0;
a0ed51b3
LW
75 return d;
76 }
6b8eaf93 77#ifdef HAS_QUAD
d7578b48 78 if (uv < UTF8_QUAD_MAX)
a0ed51b3
LW
79#endif
80 {
81 *d++ = 0xfe; /* Can't match U+FEFF! */
82 *d++ = (((uv >> 30) & 0x3f) | 0x80);
83 *d++ = (((uv >> 24) & 0x3f) | 0x80);
84 *d++ = (((uv >> 18) & 0x3f) | 0x80);
85 *d++ = (((uv >> 12) & 0x3f) | 0x80);
86 *d++ = (((uv >> 6) & 0x3f) | 0x80);
87 *d++ = (( uv & 0x3f) | 0x80);
ad391ad9 88 *d = 0;
a0ed51b3
LW
89 return d;
90 }
6b8eaf93 91#ifdef HAS_QUAD
a0ed51b3
LW
92 {
93 *d++ = 0xff; /* Can't match U+FFFE! */
3c77ea2b
GS
94 *d++ = 0x80; /* 6 Reserved bits */
95 *d++ = (((uv >> 60) & 0x0f) | 0x80); /* 2 Reserved bits */
96 *d++ = (((uv >> 54) & 0x3f) | 0x80);
97 *d++ = (((uv >> 48) & 0x3f) | 0x80);
98 *d++ = (((uv >> 42) & 0x3f) | 0x80);
a0ed51b3
LW
99 *d++ = (((uv >> 36) & 0x3f) | 0x80);
100 *d++ = (((uv >> 30) & 0x3f) | 0x80);
101 *d++ = (((uv >> 24) & 0x3f) | 0x80);
102 *d++ = (((uv >> 18) & 0x3f) | 0x80);
103 *d++ = (((uv >> 12) & 0x3f) | 0x80);
104 *d++ = (((uv >> 6) & 0x3f) | 0x80);
105 *d++ = (( uv & 0x3f) | 0x80);
ad391ad9 106 *d = 0;
a0ed51b3
LW
107 return d;
108 }
109#endif
110}
111
386d01d6
GS
112/* Tests if some arbitrary number of bytes begins in a valid UTF-8 character.
113 * The actual number of bytes in the UTF-8 character will be returned if it
114 * is valid, otherwise 0. */
067a85ef 115STRLEN
386d01d6
GS
116Perl_is_utf8_char(pTHX_ U8 *s)
117{
118 U8 u = *s;
067a85ef
A
119 STRLEN slen, len;
120 UV uv, ouv;
386d01d6 121
067a85ef 122 if (u <= 0x7f)
386d01d6
GS
123 return 1;
124
067a85ef 125 if (u >= 0x80 && u <= 0xbf)
386d01d6
GS
126 return 0;
127
9f07fdcd 128 len = UTF8SKIP(s);
386d01d6 129
067a85ef
A
130 if (len < 2 || (u >= 0xc0 && u <= 0xfd && s[1] < 0x80))
131 return 0;
132
386d01d6
GS
133 slen = len - 1;
134 s++;
067a85ef
A
135 uv = u;
136 ouv = uv;
386d01d6
GS
137 while (slen--) {
138 if ((*s & 0xc0) != 0x80)
139 return 0;
067a85ef
A
140 uv = (uv << 6) | (*s & 0x3f);
141 if (uv < ouv)
142 return 0;
143 ouv = uv;
386d01d6
GS
144 s++;
145 }
067a85ef 146
5bbb0b5a 147 if (UNISKIP(uv) < len)
067a85ef
A
148 return 0;
149
386d01d6
GS
150 return len;
151}
152
6662521e 153/*
b2a2e44b 154=for apidoc Am|is_utf8_string|U8 *s|STRLEN len
6662521e
GS
155
156Returns true if first C<len> bytes of the given string form valid a UTF8
157string, false otherwise.
158
159=cut
160*/
161
8e84507e 162bool
6662521e
GS
163Perl_is_utf8_string(pTHX_ U8 *s, STRLEN len)
164{
067a85ef
A
165 U8* x = s;
166 U8* send = s + len;
167 STRLEN c;
168
6662521e
GS
169 while (x < send) {
170 c = is_utf8_char(x);
067a85ef
A
171 if (!c)
172 return FALSE;
6662521e 173 x += c;
067a85ef
A
174 if (x > send)
175 return FALSE;
6662521e 176 }
067a85ef
A
177
178 return TRUE;
6662521e
GS
179}
180
67e989fb 181/*
be2c7115 182=for apidoc Am|U8* s|utf8_to_uv|STRLEN curlen|STRLEN *retlen|U32 flags
67e989fb
JH
183
184Returns the character value of the first character in the string C<s>
ba210ebe
JH
185which is assumed to be in UTF8 encoding and no longer than C<curlen>;
186C<retlen> will be set to the length, in bytes, of that character,
187and the pointer C<s> will be advanced to the end of the character.
67e989fb
JH
188
189If C<s> does not point to a well-formed UTF8 character, the behaviour
dcad2880
JH
190is dependent on the value of C<flags>: if it contains UTF8_CHECK_ONLY,
191it is assumed that the caller will raise a warning, and this function
4dffa63e 192will set C<retlen> to C<-1> and return zero. If the C<flags> does not
421a8bf2
JH
193contain UTF8_CHECK_ONLY, the UNICODE_REPLACEMENT (0xFFFD) will be
194returned, and C<retlen> will be set to the expected length of the
195UTF-8 character in bytes. The C<flags> can also contain various flags
196to allow deviations from the strict UTF-8 encoding (see F<utf8.h>).
67e989fb 197
dcad2880 198=cut */
67e989fb 199
a0ed51b3 200UV
dcad2880 201Perl_utf8_to_uv(pTHX_ U8* s, STRLEN curlen, STRLEN* retlen, U32 flags)
a0ed51b3 202{
ba210ebe
JH
203 UV uv = *s, ouv;
204 STRLEN len = 1;
7bf1b6bb
PP
205#ifdef EBCDIC
206 bool dowarn = 0;
207#else
ba210ebe 208 bool dowarn = ckWARN_d(WARN_UTF8);
7bf1b6bb 209#endif
ba210ebe
JH
210 STRLEN expectlen = 0;
211
0c443dc2
JH
212 if (curlen == 0) {
213 if (dowarn)
214 Perl_warner(aTHX_ WARN_UTF8,
215 "Malformed UTF-8 character (an empty string)");
216 goto malformed;
217 }
218
421a8bf2 219 if (UTF8_IS_ASCII(uv)) {
a0ed51b3
LW
220 if (retlen)
221 *retlen = 1;
222 return *s;
223 }
67e989fb 224
421a8bf2 225 if (UTF8_IS_CONTINUATION(uv) &&
fcc8fcf6 226 !(flags & UTF8_ALLOW_CONTINUATION)) {
ba210ebe
JH
227 if (dowarn)
228 Perl_warner(aTHX_ WARN_UTF8,
efbcad09 229 "Malformed UTF-8 character (unexpected continuation byte 0x%02"UVxf")",
ba210ebe
JH
230 uv);
231 goto malformed;
232 }
233
421a8bf2 234 if (UTF8_IS_START(uv) && curlen > 1 && !UTF8_IS_CONTINUATION(s[1]) &&
fcc8fcf6 235 !(flags & UTF8_ALLOW_NON_CONTINUATION)) {
ba210ebe
JH
236 if (dowarn)
237 Perl_warner(aTHX_ WARN_UTF8,
421a8bf2 238 "Malformed UTF-8 character (unexpected non-continuation byte 0x%02"UVxf" after start byte 0x%02"UVxf")",
9e29e5ff 239 (UV)s[1], uv);
ba210ebe
JH
240 goto malformed;
241 }
fcc8fcf6
JH
242
243 if ((uv == 0xfe || uv == 0xff) &&
244 !(flags & UTF8_ALLOW_FE_FF)) {
ba210ebe
JH
245 if (dowarn)
246 Perl_warner(aTHX_ WARN_UTF8,
efbcad09 247 "Malformed UTF-8 character (byte 0x%02"UVxf")",
ba210ebe
JH
248 uv);
249 goto malformed;
a0ed51b3 250 }
fcc8fcf6 251
ba210ebe
JH
252 if (!(uv & 0x20)) { len = 2; uv &= 0x1f; }
253 else if (!(uv & 0x10)) { len = 3; uv &= 0x0f; }
254 else if (!(uv & 0x08)) { len = 4; uv &= 0x07; }
255 else if (!(uv & 0x04)) { len = 5; uv &= 0x03; }
256 else if (!(uv & 0x02)) { len = 6; uv &= 0x01; }
257 else if (!(uv & 0x01)) { len = 7; uv = 0; }
3c77ea2b 258 else { len = 13; uv = 0; } /* whoa! */
fcc8fcf6 259
a0ed51b3
LW
260 if (retlen)
261 *retlen = len;
ba210ebe
JH
262
263 expectlen = len;
264
fcc8fcf6
JH
265 if ((curlen < expectlen) &&
266 !(flags & UTF8_ALLOW_SHORT)) {
ba210ebe
JH
267 if (dowarn)
268 Perl_warner(aTHX_ WARN_UTF8,
269 "Malformed UTF-8 character (%d byte%s, need %d)",
0c443dc2 270 curlen, curlen == 1 ? "" : "s", expectlen);
ba210ebe
JH
271 goto malformed;
272 }
273
274 len--;
a0ed51b3 275 s++;
ba210ebe
JH
276 ouv = uv;
277
a0ed51b3 278 while (len--) {
421a8bf2
JH
279 if (!UTF8_IS_CONTINUATION(*s) &&
280 !(flags & UTF8_ALLOW_NON_CONTINUATION)) {
ba210ebe
JH
281 if (dowarn)
282 Perl_warner(aTHX_ WARN_UTF8,
421a8bf2 283 "Malformed UTF-8 character (unexpected non-continuation byte 0x%02x)",
ba210ebe
JH
284 *s);
285 goto malformed;
a0ed51b3
LW
286 }
287 else
ba210ebe
JH
288 uv = (uv << 6) | (*s & 0x3f);
289 if (uv < ouv) {
fcc8fcf6 290 /* This cannot be allowed. */
ba210ebe
JH
291 if (dowarn)
292 Perl_warner(aTHX_ WARN_UTF8,
293 "Malformed UTF-8 character (overflow at 0x%"UVxf", byte 0x%02x)",
294 ouv, *s);
295 goto malformed;
296 }
297 s++;
298 ouv = uv;
299 }
300
421a8bf2 301 if (UNICODE_IS_SURROGATE(uv) &&
fcc8fcf6 302 !(flags & UTF8_ALLOW_SURROGATE)) {
ba210ebe
JH
303 if (dowarn)
304 Perl_warner(aTHX_ WARN_UTF8,
305 "Malformed UTF-8 character (UTF-16 surrogate 0x%04"UVxf")",
306 uv);
307 goto malformed;
421a8bf2 308 } else if (UNICODE_IS_BYTE_ORDER_MARK(uv) &&
fcc8fcf6 309 !(flags & UTF8_ALLOW_BOM)) {
ba210ebe
JH
310 if (dowarn)
311 Perl_warner(aTHX_ WARN_UTF8,
312 "Malformed UTF-8 character (byte order mark 0x%04"UVxf")",
313 uv);
314 goto malformed;
fcc8fcf6
JH
315 } else if ((expectlen > UNISKIP(uv)) &&
316 !(flags & UTF8_ALLOW_LONG)) {
ba210ebe
JH
317 if (dowarn)
318 Perl_warner(aTHX_ WARN_UTF8,
319 "Malformed UTF-8 character (%d byte%s, need %d)",
0c443dc2 320 expectlen, expectlen == 1 ? "": "s", UNISKIP(uv));
ba210ebe 321 goto malformed;
421a8bf2 322 } else if (UNICODE_IS_ILLEGAL(uv) &&
a9917092
JH
323 !(flags & UTF8_ALLOW_FFFF)) {
324 if (dowarn)
325 Perl_warner(aTHX_ WARN_UTF8,
326 "Malformed UTF-8 character (character 0x%04"UVxf")",
327 uv);
328 goto malformed;
a0ed51b3 329 }
ba210ebe 330
a0ed51b3 331 return uv;
ba210ebe
JH
332
333malformed:
334
fcc8fcf6 335 if (flags & UTF8_CHECK_ONLY) {
ba210ebe 336 if (retlen)
cc366d4b 337 *retlen = -1;
ba210ebe
JH
338 return 0;
339 }
340
341 if (retlen)
4dffa63e 342 *retlen = expectlen;
ba210ebe 343
421a8bf2 344 return UNICODE_REPLACEMENT;
a0ed51b3
LW
345}
346
8e84507e 347/*
dcad2880 348=for apidoc Am|U8* s|utf8_to_uv_simple|STRLEN *retlen
8e84507e
NIS
349
350Returns the character value of the first character in the string C<s>
351which is assumed to be in UTF8 encoding; C<retlen> will be set to the
352length, in bytes, of that character, and the pointer C<s> will be
353advanced to the end of the character.
354
ba210ebe
JH
355If C<s> does not point to a well-formed UTF8 character, zero is
356returned and retlen is set, if possible, to -1.
8e84507e
NIS
357
358=cut
359*/
360
361UV
dcad2880 362Perl_utf8_to_uv_simple(pTHX_ U8* s, STRLEN* retlen)
8e84507e 363{
2e4dc9fc 364 return Perl_utf8_to_uv(aTHX_ s, UTF8_MAXLEN, retlen, 0);
8e84507e
NIS
365}
366
b76347f2 367/*
b06226ff 368=for apidoc Am|STRLEN|utf8_length|U8* s|U8 *e
b76347f2
JH
369
370Return the length of the UTF-8 char encoded string C<s> in characters.
02eb7b47
JH
371Stops at C<e> (inclusive). If C<e E<lt> s> or if the scan would end
372up past C<e>, croaks.
b76347f2
JH
373
374=cut
375*/
376
377STRLEN
378Perl_utf8_length(pTHX_ U8* s, U8* e)
379{
380 STRLEN len = 0;
381
382 if (e < s)
02eb7b47 383 Perl_croak(aTHX_ "panic: utf8_length: unexpected end");
b76347f2 384 while (s < e) {
02eb7b47 385 U8 t = UTF8SKIP(s);
b76347f2
JH
386
387 if (e - s < t)
02eb7b47 388 Perl_croak(aTHX_ "panic: utf8_length: unaligned end");
b76347f2
JH
389 s += t;
390 len++;
391 }
392
393 return len;
394}
395
b06226ff
JH
396/*
397=for apidoc Am|IV|utf8_distance|U8 *a|U8 *b
398
399Returns the number of UTF8 characters between the UTF-8 pointers C<a>
400and C<b>.
401
402WARNING: use only if you *know* that the pointers point inside the
403same UTF-8 buffer.
404
405=cut */
a0ed51b3 406
02eb7b47 407IV
864dbfa3 408Perl_utf8_distance(pTHX_ U8 *a, U8 *b)
a0ed51b3 409{
02eb7b47
JH
410 IV off = 0;
411
a0ed51b3
LW
412 if (a < b) {
413 while (a < b) {
02eb7b47
JH
414 U8 c = UTF8SKIP(a);
415
416 if (b - a < c)
417 Perl_croak(aTHX_ "panic: utf8_distance: unaligned end");
418 a += c;
a0ed51b3
LW
419 off--;
420 }
421 }
422 else {
423 while (b < a) {
02eb7b47
JH
424 U8 c = UTF8SKIP(b);
425
426 if (a - b < c)
427 Perl_croak(aTHX_ "panic: utf8_distance: unaligned end");
428 b += c;
a0ed51b3
LW
429 off++;
430 }
431 }
02eb7b47 432
a0ed51b3
LW
433 return off;
434}
435
b06226ff
JH
436/*
437=for apidoc Am|U8*|utf8_hop|U8 *s|I32 off
438
439Move the C<s> pointing to UTF-8 data by C<off> characters, either forward
440or backward.
441
442WARNING: do not use the following unless you *know* C<off> is within
443the UTF-8 buffer pointed to by C<s>.
444
445=cut */
a0ed51b3
LW
446
447U8 *
864dbfa3 448Perl_utf8_hop(pTHX_ U8 *s, I32 off)
a0ed51b3
LW
449{
450 if (off >= 0) {
451 while (off--)
452 s += UTF8SKIP(s);
453 }
454 else {
455 while (off++) {
456 s--;
457 if (*s & 0x80) {
458 while ((*s & 0xc0) == 0x80)
459 s--;
460 }
461 }
462 }
463 return s;
464}
465
6940069f 466/*
246fae53 467=for apidoc Am|U8 *|utf8_to_bytes|U8 *s|STRLEN *len
6940069f 468
246fae53
MG
469Converts a string C<s> of length C<len> from UTF8 into byte encoding.
470Unlike C<bytes_to_utf8>, this over-writes the original string, and
471updates len to contain the new length.
67e989fb 472Returns zero on failure, setting C<len> to -1.
6940069f
GS
473
474=cut
475*/
476
477U8 *
246fae53 478Perl_utf8_to_bytes(pTHX_ U8* s, STRLEN *len)
6940069f 479{
6940069f
GS
480 U8 *send;
481 U8 *d;
dcad2880 482 U8 *save = s;
246fae53
MG
483
484 /* ensure valid UTF8 and chars < 256 before updating string */
dcad2880
JH
485 for (send = s + *len; s < send; ) {
486 U8 c = *s++;
487
9f9ab905 488 if (c >= 0x80 &&
dcad2880
JH
489 ((s >= send) ||
490 ((*s++ & 0xc0) != 0x80) || ((c & 0xfe) != 0xc2))) {
491 *len = -1;
492 return 0;
493 }
246fae53 494 }
dcad2880
JH
495
496 d = s = save;
6940069f 497 while (s < send) {
dcad2880
JH
498 if (*s < 0x80) {
499 *d++ = *s++;
500 }
6940069f 501 else {
ba210ebe 502 STRLEN ulen;
dcad2880 503 *d++ = (U8)utf8_to_uv_simple(s, &ulen);
6940069f 504 s += ulen;
6940069f
GS
505 }
506 }
507 *d = '\0';
246fae53 508 *len = d - save;
6940069f
GS
509 return save;
510}
511
512/*
6662521e 513=for apidoc Am|U8 *|bytes_to_utf8|U8 *s|STRLEN *len
6940069f
GS
514
515Converts a string C<s> of length C<len> from ASCII into UTF8 encoding.
6662521e
GS
516Returns a pointer to the newly-created string, and sets C<len> to
517reflect the new length.
6940069f 518
497711e7 519=cut
6940069f
GS
520*/
521
522U8*
6662521e 523Perl_bytes_to_utf8(pTHX_ U8* s, STRLEN *len)
6940069f 524{
6940069f
GS
525 U8 *send;
526 U8 *d;
527 U8 *dst;
6662521e 528 send = s + (*len);
6940069f 529
6662521e 530 Newz(801, d, (*len) * 2 + 1, U8);
6940069f
GS
531 dst = d;
532
533 while (s < send) {
534 if (*s < 0x80)
535 *d++ = *s++;
536 else {
537 UV uv = *s++;
538 *d++ = (( uv >> 6) | 0xc0);
539 *d++ = (( uv & 0x3f) | 0x80);
540 }
541 }
542 *d = '\0';
6662521e 543 *len = d-dst;
6940069f
GS
544 return dst;
545}
546
a0ed51b3 547/*
dea0fc0b 548 * Convert native (big-endian) or reversed (little-endian) UTF-16 to UTF-8.
a0ed51b3
LW
549 *
550 * Destination must be pre-extended to 3/2 source. Do not use in-place.
551 * We optimize for native, for obvious reasons. */
552
553U8*
dea0fc0b 554Perl_utf16_to_utf8(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen)
a0ed51b3 555{
dea0fc0b
JH
556 U8* pend;
557 U8* dstart = d;
558
559 if (bytelen & 1)
a7867d0a 560 Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen");
dea0fc0b
JH
561
562 pend = p + bytelen;
563
a0ed51b3 564 while (p < pend) {
dea0fc0b
JH
565 UV uv = (p[0] << 8) + p[1]; /* UTF-16BE */
566 p += 2;
a0ed51b3
LW
567 if (uv < 0x80) {
568 *d++ = uv;
569 continue;
570 }
571 if (uv < 0x800) {
572 *d++ = (( uv >> 6) | 0xc0);
573 *d++ = (( uv & 0x3f) | 0x80);
574 continue;
575 }
576 if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */
dea0fc0b
JH
577 UV low = *p++;
578 if (low < 0xdc00 || low >= 0xdfff)
579 Perl_croak(aTHX_ "Malformed UTF-16 surrogate");
a0ed51b3
LW
580 uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000;
581 }
582 if (uv < 0x10000) {
583 *d++ = (( uv >> 12) | 0xe0);
584 *d++ = (((uv >> 6) & 0x3f) | 0x80);
585 *d++ = (( uv & 0x3f) | 0x80);
586 continue;
587 }
588 else {
589 *d++ = (( uv >> 18) | 0xf0);
590 *d++ = (((uv >> 12) & 0x3f) | 0x80);
591 *d++ = (((uv >> 6) & 0x3f) | 0x80);
592 *d++ = (( uv & 0x3f) | 0x80);
593 continue;
594 }
595 }
dea0fc0b 596 *newlen = d - dstart;
a0ed51b3
LW
597 return d;
598}
599
600/* Note: this one is slightly destructive of the source. */
601
602U8*
dea0fc0b 603Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen)
a0ed51b3
LW
604{
605 U8* s = (U8*)p;
606 U8* send = s + bytelen;
607 while (s < send) {
608 U8 tmp = s[0];
609 s[0] = s[1];
610 s[1] = tmp;
611 s += 2;
612 }
dea0fc0b 613 return utf16_to_utf8(p, d, bytelen, newlen);
a0ed51b3
LW
614}
615
616/* for now these are all defined (inefficiently) in terms of the utf8 versions */
617
618bool
864dbfa3 619Perl_is_uni_alnum(pTHX_ U32 c)
a0ed51b3 620{
ad391ad9 621 U8 tmpbuf[UTF8_MAXLEN+1];
a0ed51b3
LW
622 uv_to_utf8(tmpbuf, (UV)c);
623 return is_utf8_alnum(tmpbuf);
624}
625
626bool
b8c5462f
JH
627Perl_is_uni_alnumc(pTHX_ U32 c)
628{
ad391ad9 629 U8 tmpbuf[UTF8_MAXLEN+1];
b8c5462f
JH
630 uv_to_utf8(tmpbuf, (UV)c);
631 return is_utf8_alnumc(tmpbuf);
632}
633
634bool
864dbfa3 635Perl_is_uni_idfirst(pTHX_ U32 c)
a0ed51b3 636{
ad391ad9 637 U8 tmpbuf[UTF8_MAXLEN+1];
a0ed51b3
LW
638 uv_to_utf8(tmpbuf, (UV)c);
639 return is_utf8_idfirst(tmpbuf);
640}
641
642bool
864dbfa3 643Perl_is_uni_alpha(pTHX_ U32 c)
a0ed51b3 644{
ad391ad9 645 U8 tmpbuf[UTF8_MAXLEN+1];
a0ed51b3
LW
646 uv_to_utf8(tmpbuf, (UV)c);
647 return is_utf8_alpha(tmpbuf);
648}
649
650bool
4d61ec05
GS
651Perl_is_uni_ascii(pTHX_ U32 c)
652{
ad391ad9 653 U8 tmpbuf[UTF8_MAXLEN+1];
4d61ec05
GS
654 uv_to_utf8(tmpbuf, (UV)c);
655 return is_utf8_ascii(tmpbuf);
656}
657
658bool
864dbfa3 659Perl_is_uni_space(pTHX_ U32 c)
a0ed51b3 660{
ad391ad9 661 U8 tmpbuf[UTF8_MAXLEN+1];
a0ed51b3
LW
662 uv_to_utf8(tmpbuf, (UV)c);
663 return is_utf8_space(tmpbuf);
664}
665
666bool
864dbfa3 667Perl_is_uni_digit(pTHX_ U32 c)
a0ed51b3 668{
ad391ad9 669 U8 tmpbuf[UTF8_MAXLEN+1];
a0ed51b3
LW
670 uv_to_utf8(tmpbuf, (UV)c);
671 return is_utf8_digit(tmpbuf);
672}
673
674bool
864dbfa3 675Perl_is_uni_upper(pTHX_ U32 c)
a0ed51b3 676{
ad391ad9 677 U8 tmpbuf[UTF8_MAXLEN+1];
a0ed51b3
LW
678 uv_to_utf8(tmpbuf, (UV)c);
679 return is_utf8_upper(tmpbuf);
680}
681
682bool
864dbfa3 683Perl_is_uni_lower(pTHX_ U32 c)
a0ed51b3 684{
ad391ad9 685 U8 tmpbuf[UTF8_MAXLEN+1];
a0ed51b3
LW
686 uv_to_utf8(tmpbuf, (UV)c);
687 return is_utf8_lower(tmpbuf);
688}
689
690bool
b8c5462f
JH
691Perl_is_uni_cntrl(pTHX_ U32 c)
692{
ad391ad9 693 U8 tmpbuf[UTF8_MAXLEN+1];
b8c5462f
JH
694 uv_to_utf8(tmpbuf, (UV)c);
695 return is_utf8_cntrl(tmpbuf);
696}
697
698bool
699Perl_is_uni_graph(pTHX_ U32 c)
700{
ad391ad9 701 U8 tmpbuf[UTF8_MAXLEN+1];
b8c5462f
JH
702 uv_to_utf8(tmpbuf, (UV)c);
703 return is_utf8_graph(tmpbuf);
704}
705
706bool
864dbfa3 707Perl_is_uni_print(pTHX_ U32 c)
a0ed51b3 708{
ad391ad9 709 U8 tmpbuf[UTF8_MAXLEN+1];
a0ed51b3
LW
710 uv_to_utf8(tmpbuf, (UV)c);
711 return is_utf8_print(tmpbuf);
712}
713
b8c5462f 714bool
f248d071 715Perl_is_uni_punct(pTHX_ U32 c)
b8c5462f 716{
ad391ad9 717 U8 tmpbuf[UTF8_MAXLEN+1];
b8c5462f
JH
718 uv_to_utf8(tmpbuf, (UV)c);
719 return is_utf8_punct(tmpbuf);
720}
721
4d61ec05
GS
722bool
723Perl_is_uni_xdigit(pTHX_ U32 c)
724{
ad391ad9 725 U8 tmpbuf[UTF8_MAXLEN+1];
4d61ec05
GS
726 uv_to_utf8(tmpbuf, (UV)c);
727 return is_utf8_xdigit(tmpbuf);
728}
729
a0ed51b3 730U32
864dbfa3 731Perl_to_uni_upper(pTHX_ U32 c)
a0ed51b3 732{
ad391ad9 733 U8 tmpbuf[UTF8_MAXLEN+1];
a0ed51b3
LW
734 uv_to_utf8(tmpbuf, (UV)c);
735 return to_utf8_upper(tmpbuf);
736}
737
738U32
864dbfa3 739Perl_to_uni_title(pTHX_ U32 c)
a0ed51b3 740{
ad391ad9 741 U8 tmpbuf[UTF8_MAXLEN+1];
a0ed51b3
LW
742 uv_to_utf8(tmpbuf, (UV)c);
743 return to_utf8_title(tmpbuf);
744}
745
746U32
864dbfa3 747Perl_to_uni_lower(pTHX_ U32 c)
a0ed51b3 748{
ad391ad9 749 U8 tmpbuf[UTF8_MAXLEN+1];
a0ed51b3
LW
750 uv_to_utf8(tmpbuf, (UV)c);
751 return to_utf8_lower(tmpbuf);
752}
753
754/* for now these all assume no locale info available for Unicode > 255 */
755
756bool
864dbfa3 757Perl_is_uni_alnum_lc(pTHX_ U32 c)
a0ed51b3
LW
758{
759 return is_uni_alnum(c); /* XXX no locale support yet */
760}
761
762bool
b8c5462f
JH
763Perl_is_uni_alnumc_lc(pTHX_ U32 c)
764{
765 return is_uni_alnumc(c); /* XXX no locale support yet */
766}
767
768bool
864dbfa3 769Perl_is_uni_idfirst_lc(pTHX_ U32 c)
a0ed51b3
LW
770{
771 return is_uni_idfirst(c); /* XXX no locale support yet */
772}
773
774bool
864dbfa3 775Perl_is_uni_alpha_lc(pTHX_ U32 c)
a0ed51b3
LW
776{
777 return is_uni_alpha(c); /* XXX no locale support yet */
778}
779
780bool
4d61ec05
GS
781Perl_is_uni_ascii_lc(pTHX_ U32 c)
782{
783 return is_uni_ascii(c); /* XXX no locale support yet */
784}
785
786bool
864dbfa3 787Perl_is_uni_space_lc(pTHX_ U32 c)
a0ed51b3
LW
788{
789 return is_uni_space(c); /* XXX no locale support yet */
790}
791
792bool
864dbfa3 793Perl_is_uni_digit_lc(pTHX_ U32 c)
a0ed51b3
LW
794{
795 return is_uni_digit(c); /* XXX no locale support yet */
796}
797
798bool
864dbfa3 799Perl_is_uni_upper_lc(pTHX_ U32 c)
a0ed51b3
LW
800{
801 return is_uni_upper(c); /* XXX no locale support yet */
802}
803
804bool
864dbfa3 805Perl_is_uni_lower_lc(pTHX_ U32 c)
a0ed51b3
LW
806{
807 return is_uni_lower(c); /* XXX no locale support yet */
808}
809
810bool
b8c5462f
JH
811Perl_is_uni_cntrl_lc(pTHX_ U32 c)
812{
813 return is_uni_cntrl(c); /* XXX no locale support yet */
814}
815
816bool
817Perl_is_uni_graph_lc(pTHX_ U32 c)
818{
819 return is_uni_graph(c); /* XXX no locale support yet */
820}
821
822bool
864dbfa3 823Perl_is_uni_print_lc(pTHX_ U32 c)
a0ed51b3
LW
824{
825 return is_uni_print(c); /* XXX no locale support yet */
826}
827
b8c5462f
JH
828bool
829Perl_is_uni_punct_lc(pTHX_ U32 c)
830{
831 return is_uni_punct(c); /* XXX no locale support yet */
832}
833
4d61ec05
GS
834bool
835Perl_is_uni_xdigit_lc(pTHX_ U32 c)
836{
837 return is_uni_xdigit(c); /* XXX no locale support yet */
838}
839
a0ed51b3 840U32
864dbfa3 841Perl_to_uni_upper_lc(pTHX_ U32 c)
a0ed51b3
LW
842{
843 return to_uni_upper(c); /* XXX no locale support yet */
844}
845
846U32
864dbfa3 847Perl_to_uni_title_lc(pTHX_ U32 c)
a0ed51b3
LW
848{
849 return to_uni_title(c); /* XXX no locale support yet */
850}
851
852U32
864dbfa3 853Perl_to_uni_lower_lc(pTHX_ U32 c)
a0ed51b3
LW
854{
855 return to_uni_lower(c); /* XXX no locale support yet */
856}
857
a0ed51b3 858bool
864dbfa3 859Perl_is_utf8_alnum(pTHX_ U8 *p)
a0ed51b3 860{
386d01d6
GS
861 if (!is_utf8_char(p))
862 return FALSE;
a0ed51b3 863 if (!PL_utf8_alnum)
289d4f09
ML
864 /* NOTE: "IsWord", not "IsAlnum", since Alnum is a true
865 * descendant of isalnum(3), in other words, it doesn't
866 * contain the '_'. --jhi */
867 PL_utf8_alnum = swash_init("utf8", "IsWord", &PL_sv_undef, 0, 0);
a0ed51b3
LW
868 return swash_fetch(PL_utf8_alnum, p);
869/* return *p == '_' || is_utf8_alpha(p) || is_utf8_digit(p); */
870#ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */
871 if (!PL_utf8_alnum)
872 PL_utf8_alnum = swash_init("utf8", "",
873 sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0);
874 return swash_fetch(PL_utf8_alnum, p);
875#endif
876}
877
878bool
b8c5462f
JH
879Perl_is_utf8_alnumc(pTHX_ U8 *p)
880{
386d01d6
GS
881 if (!is_utf8_char(p))
882 return FALSE;
b8c5462f
JH
883 if (!PL_utf8_alnum)
884 PL_utf8_alnum = swash_init("utf8", "IsAlnumC", &PL_sv_undef, 0, 0);
885 return swash_fetch(PL_utf8_alnum, p);
886/* return is_utf8_alpha(p) || is_utf8_digit(p); */
887#ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */
888 if (!PL_utf8_alnum)
889 PL_utf8_alnum = swash_init("utf8", "",
890 sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0);
891 return swash_fetch(PL_utf8_alnum, p);
892#endif
893}
894
895bool
864dbfa3 896Perl_is_utf8_idfirst(pTHX_ U8 *p)
a0ed51b3
LW
897{
898 return *p == '_' || is_utf8_alpha(p);
899}
900
901bool
864dbfa3 902Perl_is_utf8_alpha(pTHX_ U8 *p)
a0ed51b3 903{
386d01d6
GS
904 if (!is_utf8_char(p))
905 return FALSE;
a0ed51b3 906 if (!PL_utf8_alpha)
e24b16f9 907 PL_utf8_alpha = swash_init("utf8", "IsAlpha", &PL_sv_undef, 0, 0);
a0ed51b3
LW
908 return swash_fetch(PL_utf8_alpha, p);
909}
910
911bool
b8c5462f
JH
912Perl_is_utf8_ascii(pTHX_ U8 *p)
913{
386d01d6
GS
914 if (!is_utf8_char(p))
915 return FALSE;
b8c5462f
JH
916 if (!PL_utf8_ascii)
917 PL_utf8_ascii = swash_init("utf8", "IsAscii", &PL_sv_undef, 0, 0);
918 return swash_fetch(PL_utf8_ascii, p);
919}
920
921bool
864dbfa3 922Perl_is_utf8_space(pTHX_ U8 *p)
a0ed51b3 923{
386d01d6
GS
924 if (!is_utf8_char(p))
925 return FALSE;
a0ed51b3 926 if (!PL_utf8_space)
3bec3564 927 PL_utf8_space = swash_init("utf8", "IsSpacePerl", &PL_sv_undef, 0, 0);
a0ed51b3
LW
928 return swash_fetch(PL_utf8_space, p);
929}
930
931bool
864dbfa3 932Perl_is_utf8_digit(pTHX_ U8 *p)
a0ed51b3 933{
386d01d6
GS
934 if (!is_utf8_char(p))
935 return FALSE;
a0ed51b3 936 if (!PL_utf8_digit)
e24b16f9 937 PL_utf8_digit = swash_init("utf8", "IsDigit", &PL_sv_undef, 0, 0);
a0ed51b3
LW
938 return swash_fetch(PL_utf8_digit, p);
939}
940
941bool
864dbfa3 942Perl_is_utf8_upper(pTHX_ U8 *p)
a0ed51b3 943{
386d01d6
GS
944 if (!is_utf8_char(p))
945 return FALSE;
a0ed51b3 946 if (!PL_utf8_upper)
e24b16f9 947 PL_utf8_upper = swash_init("utf8", "IsUpper", &PL_sv_undef, 0, 0);
a0ed51b3
LW
948 return swash_fetch(PL_utf8_upper, p);
949}
950
951bool
864dbfa3 952Perl_is_utf8_lower(pTHX_ U8 *p)
a0ed51b3 953{
386d01d6
GS
954 if (!is_utf8_char(p))
955 return FALSE;
a0ed51b3 956 if (!PL_utf8_lower)
e24b16f9 957 PL_utf8_lower = swash_init("utf8", "IsLower", &PL_sv_undef, 0, 0);
a0ed51b3
LW
958 return swash_fetch(PL_utf8_lower, p);
959}
960
961bool
b8c5462f
JH
962Perl_is_utf8_cntrl(pTHX_ U8 *p)
963{
386d01d6
GS
964 if (!is_utf8_char(p))
965 return FALSE;
b8c5462f
JH
966 if (!PL_utf8_cntrl)
967 PL_utf8_cntrl = swash_init("utf8", "IsCntrl", &PL_sv_undef, 0, 0);
968 return swash_fetch(PL_utf8_cntrl, p);
969}
970
971bool
972Perl_is_utf8_graph(pTHX_ U8 *p)
973{
386d01d6
GS
974 if (!is_utf8_char(p))
975 return FALSE;
b8c5462f
JH
976 if (!PL_utf8_graph)
977 PL_utf8_graph = swash_init("utf8", "IsGraph", &PL_sv_undef, 0, 0);
978 return swash_fetch(PL_utf8_graph, p);
979}
980
981bool
864dbfa3 982Perl_is_utf8_print(pTHX_ U8 *p)
a0ed51b3 983{
386d01d6
GS
984 if (!is_utf8_char(p))
985 return FALSE;
a0ed51b3 986 if (!PL_utf8_print)
e24b16f9 987 PL_utf8_print = swash_init("utf8", "IsPrint", &PL_sv_undef, 0, 0);
a0ed51b3
LW
988 return swash_fetch(PL_utf8_print, p);
989}
990
991bool
b8c5462f
JH
992Perl_is_utf8_punct(pTHX_ U8 *p)
993{
386d01d6
GS
994 if (!is_utf8_char(p))
995 return FALSE;
b8c5462f
JH
996 if (!PL_utf8_punct)
997 PL_utf8_punct = swash_init("utf8", "IsPunct", &PL_sv_undef, 0, 0);
998 return swash_fetch(PL_utf8_punct, p);
999}
1000
1001bool
1002Perl_is_utf8_xdigit(pTHX_ U8 *p)
1003{
386d01d6
GS
1004 if (!is_utf8_char(p))
1005 return FALSE;
b8c5462f
JH
1006 if (!PL_utf8_xdigit)
1007 PL_utf8_xdigit = swash_init("utf8", "IsXDigit", &PL_sv_undef, 0, 0);
1008 return swash_fetch(PL_utf8_xdigit, p);
1009}
1010
1011bool
864dbfa3 1012Perl_is_utf8_mark(pTHX_ U8 *p)
a0ed51b3 1013{
386d01d6
GS
1014 if (!is_utf8_char(p))
1015 return FALSE;
a0ed51b3 1016 if (!PL_utf8_mark)
e24b16f9 1017 PL_utf8_mark = swash_init("utf8", "IsM", &PL_sv_undef, 0, 0);
a0ed51b3
LW
1018 return swash_fetch(PL_utf8_mark, p);
1019}
1020
2104c8d9 1021UV
864dbfa3 1022Perl_to_utf8_upper(pTHX_ U8 *p)
a0ed51b3
LW
1023{
1024 UV uv;
1025
1026 if (!PL_utf8_toupper)
e24b16f9 1027 PL_utf8_toupper = swash_init("utf8", "ToUpper", &PL_sv_undef, 4, 0);
a0ed51b3 1028 uv = swash_fetch(PL_utf8_toupper, p);
756820e3 1029 return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0);
a0ed51b3
LW
1030}
1031
2104c8d9 1032UV
864dbfa3 1033Perl_to_utf8_title(pTHX_ U8 *p)
a0ed51b3
LW
1034{
1035 UV uv;
1036
1037 if (!PL_utf8_totitle)
e24b16f9 1038 PL_utf8_totitle = swash_init("utf8", "ToTitle", &PL_sv_undef, 4, 0);
a0ed51b3 1039 uv = swash_fetch(PL_utf8_totitle, p);
756820e3 1040 return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0);
a0ed51b3
LW
1041}
1042
2104c8d9 1043UV
864dbfa3 1044Perl_to_utf8_lower(pTHX_ U8 *p)
a0ed51b3
LW
1045{
1046 UV uv;
1047
1048 if (!PL_utf8_tolower)
e24b16f9 1049 PL_utf8_tolower = swash_init("utf8", "ToLower", &PL_sv_undef, 4, 0);
a0ed51b3 1050 uv = swash_fetch(PL_utf8_tolower, p);
756820e3 1051 return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0);
a0ed51b3
LW
1052}
1053
1054/* a "swash" is a swatch hash */
1055
1056SV*
864dbfa3 1057Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none)
a0ed51b3
LW
1058{
1059 SV* retval;
1060 char tmpbuf[256];
8e84507e 1061 dSP;
ce3b816e
GS
1062
1063 if (!gv_stashpv(pkg, 0)) { /* demand load utf8 */
1064 ENTER;
1065 Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpv(pkg,0), Nullsv);
1066 LEAVE;
1067 }
1068 SPAGAIN;
a0ed51b3
LW
1069 PUSHSTACKi(PERLSI_MAGIC);
1070 PUSHMARK(SP);
1071 EXTEND(SP,5);
1072 PUSHs(sv_2mortal(newSVpvn(pkg, strlen(pkg))));
1073 PUSHs(sv_2mortal(newSVpvn(name, strlen(name))));
1074 PUSHs(listsv);
1075 PUSHs(sv_2mortal(newSViv(minbits)));
1076 PUSHs(sv_2mortal(newSViv(none)));
1077 PUTBACK;
1078 ENTER;
1079 SAVEI32(PL_hints);
1080 PL_hints = 0;
1081 save_re_context();
e24b16f9 1082 if (PL_curcop == &PL_compiling) /* XXX ought to be handled by lex_start */
a0ed51b3 1083 strncpy(tmpbuf, PL_tokenbuf, sizeof tmpbuf);
864dbfa3 1084 if (call_method("SWASHNEW", G_SCALAR))
8e84507e 1085 retval = newSVsv(*PL_stack_sp--);
a0ed51b3 1086 else
e24b16f9 1087 retval = &PL_sv_undef;
a0ed51b3
LW
1088 LEAVE;
1089 POPSTACK;
e24b16f9 1090 if (PL_curcop == &PL_compiling) {
a0ed51b3 1091 strncpy(PL_tokenbuf, tmpbuf, sizeof tmpbuf);
e24b16f9 1092 PL_curcop->op_private = PL_hints;
a0ed51b3
LW
1093 }
1094 if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV)
cea2e8a9 1095 Perl_croak(aTHX_ "SWASHNEW didn't return an HV ref");
a0ed51b3
LW
1096 return retval;
1097}
1098
1099UV
864dbfa3 1100Perl_swash_fetch(pTHX_ SV *sv, U8 *ptr)
a0ed51b3
LW
1101{
1102 HV* hv = (HV*)SvRV(sv);
1103 U32 klen = UTF8SKIP(ptr) - 1;
1104 U32 off = ptr[klen] & 127; /* NB: 64 bit always 0 when len > 1 */
1105 STRLEN slen;
1106 STRLEN needents = (klen ? 64 : 128);
dfe13c55 1107 U8 *tmps;
a0ed51b3
LW
1108 U32 bit;
1109 SV *retval;
1110
1111 /*
1112 * This single-entry cache saves about 1/3 of the utf8 overhead in test
1113 * suite. (That is, only 7-8% overall over just a hash cache. Still,
1114 * it's nothing to sniff at.) Pity we usually come through at least
1115 * two function calls to get here...
1116 *
1117 * NB: this code assumes that swatches are never modified, once generated!
1118 */
1119
1120 if (hv == PL_last_swash_hv &&
1121 klen == PL_last_swash_klen &&
12ae5dfc 1122 (!klen || memEQ((char *)ptr,(char *)PL_last_swash_key,klen)) )
a0ed51b3
LW
1123 {
1124 tmps = PL_last_swash_tmps;
1125 slen = PL_last_swash_slen;
1126 }
1127 else {
1128 /* Try our second-level swatch cache, kept in a hash. */
dfe13c55 1129 SV** svp = hv_fetch(hv, (char*)ptr, klen, FALSE);
a0ed51b3
LW
1130
1131 /* If not cached, generate it via utf8::SWASHGET */
dfe13c55 1132 if (!svp || !SvPOK(*svp) || !(tmps = (U8*)SvPV(*svp, slen))) {
a0ed51b3
LW
1133 dSP;
1134 ENTER;
1135 SAVETMPS;
1136 save_re_context();
1137 PUSHSTACKi(PERLSI_MAGIC);
1138 PUSHMARK(SP);
1139 EXTEND(SP,3);
1140 PUSHs((SV*)sv);
756820e3 1141 PUSHs(sv_2mortal(newSViv(utf8_to_uv(ptr, UTF8_MAXLEN, 0, 0) & ~(needents - 1))));
a0ed51b3
LW
1142 PUSHs(sv_2mortal(newSViv(needents)));
1143 PUTBACK;
864dbfa3 1144 if (call_method("SWASHGET", G_SCALAR))
8e84507e 1145 retval = newSVsv(*PL_stack_sp--);
a0ed51b3 1146 else
e24b16f9 1147 retval = &PL_sv_undef;
a0ed51b3
LW
1148 POPSTACK;
1149 FREETMPS;
1150 LEAVE;
e24b16f9
GS
1151 if (PL_curcop == &PL_compiling)
1152 PL_curcop->op_private = PL_hints;
a0ed51b3 1153
dfe13c55 1154 svp = hv_store(hv, (char*)ptr, klen, retval, 0);
a0ed51b3 1155
dfe13c55 1156 if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || slen < 8)
cea2e8a9 1157 Perl_croak(aTHX_ "SWASHGET didn't return result of proper length");
a0ed51b3
LW
1158 }
1159
1160 PL_last_swash_hv = hv;
1161 PL_last_swash_klen = klen;
1162 PL_last_swash_tmps = tmps;
1163 PL_last_swash_slen = slen;
1164 if (klen)
1165 Copy(ptr, PL_last_swash_key, klen, U8);
1166 }
1167
9faf8d75 1168 switch ((int)((slen << 3) / needents)) {
a0ed51b3
LW
1169 case 1:
1170 bit = 1 << (off & 7);
1171 off >>= 3;
1172 return (tmps[off] & bit) != 0;
1173 case 8:
1174 return tmps[off];
1175 case 16:
1176 off <<= 1;
1177 return (tmps[off] << 8) + tmps[off + 1] ;
1178 case 32:
1179 off <<= 2;
1180 return (tmps[off] << 24) + (tmps[off+1] << 16) + (tmps[off+2] << 8) + tmps[off + 3] ;
1181 }
cea2e8a9 1182 Perl_croak(aTHX_ "panic: swash_fetch");
a0ed51b3
LW
1183 return 0;
1184}