3 * Copyright (c) 1998-2000, Larry Wall
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.
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.'
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?'
19 * ...the travellers perceived that the floor was paved with stones of many
20 * hues; branching runes and strange devices intertwined beneath their feet.
24 #define PERL_IN_UTF8_C
30 Perl_uv_to_utf8(pTHX_ U8 *d, UV uv)
37 *d++ = (( uv >> 6) | 0xc0);
38 *d++ = (( uv & 0x3f) | 0x80);
42 *d++ = (( uv >> 12) | 0xe0);
43 *d++ = (((uv >> 6) & 0x3f) | 0x80);
44 *d++ = (( uv & 0x3f) | 0x80);
48 *d++ = (( uv >> 18) | 0xf0);
49 *d++ = (((uv >> 12) & 0x3f) | 0x80);
50 *d++ = (((uv >> 6) & 0x3f) | 0x80);
51 *d++ = (( uv & 0x3f) | 0x80);
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);
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);
72 if (uv < 0x1000000000LL)
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);
86 *d++ = 0xff; /* Can't match U+FFFE! */
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);
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);
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. */
108 Perl_is_utf8_char(pTHX_ U8 *s)
119 if (!(u & 0x20)) { len = 2; }
120 else if (!(u & 0x10)) { len = 3; }
121 else if (!(u & 0x08)) { len = 4; }
122 else if (!(u & 0x04)) { len = 5; }
123 else if (!(u & 0x02)) { len = 6; }
124 else if (!(u & 0x01)) { len = 7; }
125 else { len = 13; } /* whoa! */
130 if ((*s & 0xc0) != 0x80)
138 =for apidoc Am|bool_utf8_string|U8 *s|STRLEN len
140 Returns true if first C<len> bytes of the given string form valid a UTF8
141 string, false otherwise.
147 Perl_is_utf8_string(pTHX_ U8 *s, STRLEN len)
162 Perl_utf8_to_uv(pTHX_ U8* s, I32* retlen)
173 if (ckWARN_d(WARN_UTF8))
174 Perl_warner(aTHX_ WARN_UTF8, "Malformed UTF-8 character");
180 if (!(uv & 0x20)) { len = 2; uv &= 0x1f; }
181 else if (!(uv & 0x10)) { len = 3; uv &= 0x0f; }
182 else if (!(uv & 0x08)) { len = 4; uv &= 0x07; }
183 else if (!(uv & 0x04)) { len = 5; uv &= 0x03; }
184 else if (!(uv & 0x02)) { len = 6; uv &= 0x01; }
185 else if (!(uv & 0x01)) { len = 7; uv = 0; }
186 else { len = 13; uv = 0; } /* whoa! */
193 if ((*s & 0xc0) != 0x80) {
195 if (ckWARN_d(WARN_UTF8))
196 Perl_warner(aTHX_ WARN_UTF8, "Malformed UTF-8 character");
202 uv = (uv << 6) | (*s++ & 0x3f);
207 /* utf8_distance(a,b) is intended to be a - b in pointer arithmetic */
210 Perl_utf8_distance(pTHX_ U8 *a, U8 *b)
228 /* WARNING: do not use the following unless you *know* off is within bounds */
231 Perl_utf8_hop(pTHX_ U8 *s, I32 off)
241 while ((*s & 0xc0) == 0x80)
250 =for apidoc Am|U8 *|utf8_to_bytes|U8 *s|STRLEN len
252 Converts a string C<s> of length C<len> from UTF8 into ASCII encoding.
253 Unlike C<bytes_to_utf8>, this over-writes the original string.
254 Returns zero on failure after converting as much as possible.
260 Perl_utf8_to_bytes(pTHX_ U8* s, STRLEN len)
274 UV uv = utf8_to_uv(s, &ulen);
288 =for apidoc Am|U8 *|bytes_to_utf8|U8 *s|STRLEN *len
290 Converts a string C<s> of length C<len> from ASCII into UTF8 encoding.
291 Returns a pointer to the newly-created string, and sets C<len> to
292 reflect the new length.
298 Perl_bytes_to_utf8(pTHX_ U8* s, STRLEN *len)
306 Newz(801, d, (*len) * 2 + 1, U8);
314 *d++ = (( uv >> 6) | 0xc0);
315 *d++ = (( uv & 0x3f) | 0x80);
324 * Convert native or reversed UTF-16 to UTF-8.
326 * Destination must be pre-extended to 3/2 source. Do not use in-place.
327 * We optimize for native, for obvious reasons. */
329 /* There are several problems with utf16_to_utf8().
330 * (1) U16 is not necessarily *exactly* two bytes.
331 * (2) Secondly, no check is made for odd length.
332 * (3) Thirdly, the "Malformed UTF-16 surrogate" should probably be
333 * a hard error (and it should be listed in perldiag).
334 * (4) The tests (in comp/t/require.t) are a joke: the UTF16 BOM
335 * really ought to be followed by valid UTF16 characters.
338 Perl_utf16_to_utf8(pTHX_ U16* p, U8* d, I32 bytelen)
340 U16* pend = p + bytelen / 2;
348 *d++ = (( uv >> 6) | 0xc0);
349 *d++ = (( uv & 0x3f) | 0x80);
352 if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */
355 if (low < 0xdc00 || low >= 0xdfff) {
356 if (ckWARN_d(WARN_UTF8))
357 Perl_warner(aTHX_ WARN_UTF8, "Malformed UTF-16 surrogate");
361 uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000;
364 *d++ = (( uv >> 12) | 0xe0);
365 *d++ = (((uv >> 6) & 0x3f) | 0x80);
366 *d++ = (( uv & 0x3f) | 0x80);
370 *d++ = (( uv >> 18) | 0xf0);
371 *d++ = (((uv >> 12) & 0x3f) | 0x80);
372 *d++ = (((uv >> 6) & 0x3f) | 0x80);
373 *d++ = (( uv & 0x3f) | 0x80);
380 /* Note: this one is slightly destructive of the source. */
383 Perl_utf16_to_utf8_reversed(pTHX_ U16* p, U8* d, I32 bytelen)
386 U8* send = s + bytelen;
393 return utf16_to_utf8(p, d, bytelen);
396 /* for now these are all defined (inefficiently) in terms of the utf8 versions */
399 Perl_is_uni_alnum(pTHX_ U32 c)
401 U8 tmpbuf[UTF8_MAXLEN];
402 uv_to_utf8(tmpbuf, (UV)c);
403 return is_utf8_alnum(tmpbuf);
407 Perl_is_uni_alnumc(pTHX_ U32 c)
409 U8 tmpbuf[UTF8_MAXLEN];
410 uv_to_utf8(tmpbuf, (UV)c);
411 return is_utf8_alnumc(tmpbuf);
415 Perl_is_uni_idfirst(pTHX_ U32 c)
417 U8 tmpbuf[UTF8_MAXLEN];
418 uv_to_utf8(tmpbuf, (UV)c);
419 return is_utf8_idfirst(tmpbuf);
423 Perl_is_uni_alpha(pTHX_ U32 c)
425 U8 tmpbuf[UTF8_MAXLEN];
426 uv_to_utf8(tmpbuf, (UV)c);
427 return is_utf8_alpha(tmpbuf);
431 Perl_is_uni_ascii(pTHX_ U32 c)
433 U8 tmpbuf[UTF8_MAXLEN];
434 uv_to_utf8(tmpbuf, (UV)c);
435 return is_utf8_ascii(tmpbuf);
439 Perl_is_uni_space(pTHX_ U32 c)
441 U8 tmpbuf[UTF8_MAXLEN];
442 uv_to_utf8(tmpbuf, (UV)c);
443 return is_utf8_space(tmpbuf);
447 Perl_is_uni_digit(pTHX_ U32 c)
449 U8 tmpbuf[UTF8_MAXLEN];
450 uv_to_utf8(tmpbuf, (UV)c);
451 return is_utf8_digit(tmpbuf);
455 Perl_is_uni_upper(pTHX_ U32 c)
457 U8 tmpbuf[UTF8_MAXLEN];
458 uv_to_utf8(tmpbuf, (UV)c);
459 return is_utf8_upper(tmpbuf);
463 Perl_is_uni_lower(pTHX_ U32 c)
465 U8 tmpbuf[UTF8_MAXLEN];
466 uv_to_utf8(tmpbuf, (UV)c);
467 return is_utf8_lower(tmpbuf);
471 Perl_is_uni_cntrl(pTHX_ U32 c)
473 U8 tmpbuf[UTF8_MAXLEN];
474 uv_to_utf8(tmpbuf, (UV)c);
475 return is_utf8_cntrl(tmpbuf);
479 Perl_is_uni_graph(pTHX_ U32 c)
481 U8 tmpbuf[UTF8_MAXLEN];
482 uv_to_utf8(tmpbuf, (UV)c);
483 return is_utf8_graph(tmpbuf);
487 Perl_is_uni_print(pTHX_ U32 c)
489 U8 tmpbuf[UTF8_MAXLEN];
490 uv_to_utf8(tmpbuf, (UV)c);
491 return is_utf8_print(tmpbuf);
495 Perl_is_uni_punct(pTHX_ U32 c)
497 U8 tmpbuf[UTF8_MAXLEN];
498 uv_to_utf8(tmpbuf, (UV)c);
499 return is_utf8_punct(tmpbuf);
503 Perl_is_uni_xdigit(pTHX_ U32 c)
505 U8 tmpbuf[UTF8_MAXLEN];
506 uv_to_utf8(tmpbuf, (UV)c);
507 return is_utf8_xdigit(tmpbuf);
511 Perl_to_uni_upper(pTHX_ U32 c)
513 U8 tmpbuf[UTF8_MAXLEN];
514 uv_to_utf8(tmpbuf, (UV)c);
515 return to_utf8_upper(tmpbuf);
519 Perl_to_uni_title(pTHX_ U32 c)
521 U8 tmpbuf[UTF8_MAXLEN];
522 uv_to_utf8(tmpbuf, (UV)c);
523 return to_utf8_title(tmpbuf);
527 Perl_to_uni_lower(pTHX_ U32 c)
529 U8 tmpbuf[UTF8_MAXLEN];
530 uv_to_utf8(tmpbuf, (UV)c);
531 return to_utf8_lower(tmpbuf);
534 /* for now these all assume no locale info available for Unicode > 255 */
537 Perl_is_uni_alnum_lc(pTHX_ U32 c)
539 return is_uni_alnum(c); /* XXX no locale support yet */
543 Perl_is_uni_alnumc_lc(pTHX_ U32 c)
545 return is_uni_alnumc(c); /* XXX no locale support yet */
549 Perl_is_uni_idfirst_lc(pTHX_ U32 c)
551 return is_uni_idfirst(c); /* XXX no locale support yet */
555 Perl_is_uni_alpha_lc(pTHX_ U32 c)
557 return is_uni_alpha(c); /* XXX no locale support yet */
561 Perl_is_uni_ascii_lc(pTHX_ U32 c)
563 return is_uni_ascii(c); /* XXX no locale support yet */
567 Perl_is_uni_space_lc(pTHX_ U32 c)
569 return is_uni_space(c); /* XXX no locale support yet */
573 Perl_is_uni_digit_lc(pTHX_ U32 c)
575 return is_uni_digit(c); /* XXX no locale support yet */
579 Perl_is_uni_upper_lc(pTHX_ U32 c)
581 return is_uni_upper(c); /* XXX no locale support yet */
585 Perl_is_uni_lower_lc(pTHX_ U32 c)
587 return is_uni_lower(c); /* XXX no locale support yet */
591 Perl_is_uni_cntrl_lc(pTHX_ U32 c)
593 return is_uni_cntrl(c); /* XXX no locale support yet */
597 Perl_is_uni_graph_lc(pTHX_ U32 c)
599 return is_uni_graph(c); /* XXX no locale support yet */
603 Perl_is_uni_print_lc(pTHX_ U32 c)
605 return is_uni_print(c); /* XXX no locale support yet */
609 Perl_is_uni_punct_lc(pTHX_ U32 c)
611 return is_uni_punct(c); /* XXX no locale support yet */
615 Perl_is_uni_xdigit_lc(pTHX_ U32 c)
617 return is_uni_xdigit(c); /* XXX no locale support yet */
621 Perl_to_uni_upper_lc(pTHX_ U32 c)
623 return to_uni_upper(c); /* XXX no locale support yet */
627 Perl_to_uni_title_lc(pTHX_ U32 c)
629 return to_uni_title(c); /* XXX no locale support yet */
633 Perl_to_uni_lower_lc(pTHX_ U32 c)
635 return to_uni_lower(c); /* XXX no locale support yet */
639 Perl_is_utf8_alnum(pTHX_ U8 *p)
641 if (!is_utf8_char(p))
644 PL_utf8_alnum = swash_init("utf8", "IsAlnum", &PL_sv_undef, 0, 0);
645 return swash_fetch(PL_utf8_alnum, p);
646 /* return *p == '_' || is_utf8_alpha(p) || is_utf8_digit(p); */
647 #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */
649 PL_utf8_alnum = swash_init("utf8", "",
650 sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0);
651 return swash_fetch(PL_utf8_alnum, p);
656 Perl_is_utf8_alnumc(pTHX_ U8 *p)
658 if (!is_utf8_char(p))
661 PL_utf8_alnum = swash_init("utf8", "IsAlnumC", &PL_sv_undef, 0, 0);
662 return swash_fetch(PL_utf8_alnum, p);
663 /* return is_utf8_alpha(p) || is_utf8_digit(p); */
664 #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */
666 PL_utf8_alnum = swash_init("utf8", "",
667 sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0);
668 return swash_fetch(PL_utf8_alnum, p);
673 Perl_is_utf8_idfirst(pTHX_ U8 *p)
675 return *p == '_' || is_utf8_alpha(p);
679 Perl_is_utf8_alpha(pTHX_ U8 *p)
681 if (!is_utf8_char(p))
684 PL_utf8_alpha = swash_init("utf8", "IsAlpha", &PL_sv_undef, 0, 0);
685 return swash_fetch(PL_utf8_alpha, p);
689 Perl_is_utf8_ascii(pTHX_ U8 *p)
691 if (!is_utf8_char(p))
694 PL_utf8_ascii = swash_init("utf8", "IsAscii", &PL_sv_undef, 0, 0);
695 return swash_fetch(PL_utf8_ascii, p);
699 Perl_is_utf8_space(pTHX_ U8 *p)
701 if (!is_utf8_char(p))
704 PL_utf8_space = swash_init("utf8", "IsSpace", &PL_sv_undef, 0, 0);
705 return swash_fetch(PL_utf8_space, p);
709 Perl_is_utf8_digit(pTHX_ U8 *p)
711 if (!is_utf8_char(p))
714 PL_utf8_digit = swash_init("utf8", "IsDigit", &PL_sv_undef, 0, 0);
715 return swash_fetch(PL_utf8_digit, p);
719 Perl_is_utf8_upper(pTHX_ U8 *p)
721 if (!is_utf8_char(p))
724 PL_utf8_upper = swash_init("utf8", "IsUpper", &PL_sv_undef, 0, 0);
725 return swash_fetch(PL_utf8_upper, p);
729 Perl_is_utf8_lower(pTHX_ U8 *p)
731 if (!is_utf8_char(p))
734 PL_utf8_lower = swash_init("utf8", "IsLower", &PL_sv_undef, 0, 0);
735 return swash_fetch(PL_utf8_lower, p);
739 Perl_is_utf8_cntrl(pTHX_ U8 *p)
741 if (!is_utf8_char(p))
744 PL_utf8_cntrl = swash_init("utf8", "IsCntrl", &PL_sv_undef, 0, 0);
745 return swash_fetch(PL_utf8_cntrl, p);
749 Perl_is_utf8_graph(pTHX_ U8 *p)
751 if (!is_utf8_char(p))
754 PL_utf8_graph = swash_init("utf8", "IsGraph", &PL_sv_undef, 0, 0);
755 return swash_fetch(PL_utf8_graph, p);
759 Perl_is_utf8_print(pTHX_ U8 *p)
761 if (!is_utf8_char(p))
764 PL_utf8_print = swash_init("utf8", "IsPrint", &PL_sv_undef, 0, 0);
765 return swash_fetch(PL_utf8_print, p);
769 Perl_is_utf8_punct(pTHX_ U8 *p)
771 if (!is_utf8_char(p))
774 PL_utf8_punct = swash_init("utf8", "IsPunct", &PL_sv_undef, 0, 0);
775 return swash_fetch(PL_utf8_punct, p);
779 Perl_is_utf8_xdigit(pTHX_ U8 *p)
781 if (!is_utf8_char(p))
784 PL_utf8_xdigit = swash_init("utf8", "IsXDigit", &PL_sv_undef, 0, 0);
785 return swash_fetch(PL_utf8_xdigit, p);
789 Perl_is_utf8_mark(pTHX_ U8 *p)
791 if (!is_utf8_char(p))
794 PL_utf8_mark = swash_init("utf8", "IsM", &PL_sv_undef, 0, 0);
795 return swash_fetch(PL_utf8_mark, p);
799 Perl_to_utf8_upper(pTHX_ U8 *p)
803 if (!PL_utf8_toupper)
804 PL_utf8_toupper = swash_init("utf8", "ToUpper", &PL_sv_undef, 4, 0);
805 uv = swash_fetch(PL_utf8_toupper, p);
806 return uv ? uv : utf8_to_uv(p,0);
810 Perl_to_utf8_title(pTHX_ U8 *p)
814 if (!PL_utf8_totitle)
815 PL_utf8_totitle = swash_init("utf8", "ToTitle", &PL_sv_undef, 4, 0);
816 uv = swash_fetch(PL_utf8_totitle, p);
817 return uv ? uv : utf8_to_uv(p,0);
821 Perl_to_utf8_lower(pTHX_ U8 *p)
825 if (!PL_utf8_tolower)
826 PL_utf8_tolower = swash_init("utf8", "ToLower", &PL_sv_undef, 4, 0);
827 uv = swash_fetch(PL_utf8_tolower, p);
828 return uv ? uv : utf8_to_uv(p,0);
831 /* a "swash" is a swatch hash */
834 Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none)
840 if (!gv_stashpv(pkg, 0)) { /* demand load utf8 */
842 Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpv(pkg,0), Nullsv);
846 PUSHSTACKi(PERLSI_MAGIC);
849 PUSHs(sv_2mortal(newSVpvn(pkg, strlen(pkg))));
850 PUSHs(sv_2mortal(newSVpvn(name, strlen(name))));
852 PUSHs(sv_2mortal(newSViv(minbits)));
853 PUSHs(sv_2mortal(newSViv(none)));
859 if (PL_curcop == &PL_compiling) /* XXX ought to be handled by lex_start */
860 strncpy(tmpbuf, PL_tokenbuf, sizeof tmpbuf);
861 if (call_method("SWASHNEW", G_SCALAR))
862 retval = newSVsv(*PL_stack_sp--);
864 retval = &PL_sv_undef;
867 if (PL_curcop == &PL_compiling) {
868 strncpy(PL_tokenbuf, tmpbuf, sizeof tmpbuf);
869 PL_curcop->op_private = PL_hints;
871 if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV)
872 Perl_croak(aTHX_ "SWASHNEW didn't return an HV ref");
877 Perl_swash_fetch(pTHX_ SV *sv, U8 *ptr)
879 HV* hv = (HV*)SvRV(sv);
880 U32 klen = UTF8SKIP(ptr) - 1;
881 U32 off = ptr[klen] & 127; /* NB: 64 bit always 0 when len > 1 */
883 STRLEN needents = (klen ? 64 : 128);
889 * This single-entry cache saves about 1/3 of the utf8 overhead in test
890 * suite. (That is, only 7-8% overall over just a hash cache. Still,
891 * it's nothing to sniff at.) Pity we usually come through at least
892 * two function calls to get here...
894 * NB: this code assumes that swatches are never modified, once generated!
897 if (hv == PL_last_swash_hv &&
898 klen == PL_last_swash_klen &&
899 (!klen || memEQ((char *)ptr,(char *)PL_last_swash_key,klen)) )
901 tmps = PL_last_swash_tmps;
902 slen = PL_last_swash_slen;
905 /* Try our second-level swatch cache, kept in a hash. */
906 SV** svp = hv_fetch(hv, (char*)ptr, klen, FALSE);
908 /* If not cached, generate it via utf8::SWASHGET */
909 if (!svp || !SvPOK(*svp) || !(tmps = (U8*)SvPV(*svp, slen))) {
914 PUSHSTACKi(PERLSI_MAGIC);
918 PUSHs(sv_2mortal(newSViv(utf8_to_uv(ptr, 0) & ~(needents - 1))));
919 PUSHs(sv_2mortal(newSViv(needents)));
921 if (call_method("SWASHGET", G_SCALAR))
922 retval = newSVsv(*PL_stack_sp--);
924 retval = &PL_sv_undef;
928 if (PL_curcop == &PL_compiling)
929 PL_curcop->op_private = PL_hints;
931 svp = hv_store(hv, (char*)ptr, klen, retval, 0);
933 if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || slen < 8)
934 Perl_croak(aTHX_ "SWASHGET didn't return result of proper length");
937 PL_last_swash_hv = hv;
938 PL_last_swash_klen = klen;
939 PL_last_swash_tmps = tmps;
940 PL_last_swash_slen = slen;
942 Copy(ptr, PL_last_swash_key, klen, U8);
945 switch ((slen << 3) / needents) {
947 bit = 1 << (off & 7);
949 return (tmps[off] & bit) != 0;
954 return (tmps[off] << 8) + tmps[off + 1] ;
957 return (tmps[off] << 24) + (tmps[off+1] << 16) + (tmps[off+2] << 8) + tmps[off + 3] ;
959 Perl_croak(aTHX_ "panic: swash_fetch");