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)
124 if ((*s & 0xc0) != 0x80)
132 =for apidoc Am|is_utf8_string|U8 *s|STRLEN len
134 Returns true if first C<len> bytes of the given string form valid a UTF8
135 string, false otherwise.
141 Perl_is_utf8_string(pTHX_ U8 *s, STRLEN len)
156 =for apidoc Am|U8* s|utf8_to_uv_chk|STRLEN curlen|I32 *retlen|I32 checking
158 Returns the character value of the first character in the string C<s>
159 which is assumed to be in UTF8 encoding and no longer than C<curlen>;
160 C<retlen> will be set to the length, in bytes, of that character,
161 and the pointer C<s> will be advanced to the end of the character.
163 If C<s> does not point to a well-formed UTF8 character, the behaviour
164 is dependent on the value of C<checking>: if this is true, it is
165 assumed that the caller will raise a warning, and this function will
166 set C<retlen> to C<-1> and return. If C<checking> is not true, an optional UTF8
173 Perl_utf8_to_uv_chk(pTHX_ U8* s, STRLEN curlen, STRLEN* retlen, bool checking)
178 bool dowarn = ckWARN_d(WARN_UTF8);
179 STRLEN expectlen = 0;
181 if (uv <= 0x7f) { /* Pure ASCII. */
187 if (uv >= 0x80 && uv <= 0xbf) {
189 Perl_warner(aTHX_ WARN_UTF8,
190 "Malformed UTF-8 character (unexpected continuation byte 0x%02x)",
195 if (uv >= 0xc0 && uv <= 0xfd && curlen > 1 && s[1] < 0x80) {
197 Perl_warner(aTHX_ WARN_UTF8,
198 "Malformed UTF-8 character (unexpected non-continuation byte 0x%02x after byte 0x%02x)",
203 if ((uv == 0xfe || uv == 0xff) && IN_UTF8){
205 Perl_warner(aTHX_ WARN_UTF8,
206 "Malformed UTF-8 character (impossible byte 0x%02x)",
211 if (!(uv & 0x20)) { len = 2; uv &= 0x1f; }
212 else if (!(uv & 0x10)) { len = 3; uv &= 0x0f; }
213 else if (!(uv & 0x08)) { len = 4; uv &= 0x07; }
214 else if (!(uv & 0x04)) { len = 5; uv &= 0x03; }
215 else if (!(uv & 0x02)) { len = 6; uv &= 0x01; }
216 else if (!(uv & 0x01)) { len = 7; uv = 0; }
217 else { len = 13; uv = 0; } /* whoa! */
224 if (curlen < expectlen) {
226 Perl_warner(aTHX_ WARN_UTF8,
227 "Malformed UTF-8 character (%d byte%s, need %d)",
228 curlen, curlen > 1 ? "s" : "", expectlen);
237 if ((*s & 0xc0) != 0x80) {
239 Perl_warner(aTHX_ WARN_UTF8,
240 "Malformed UTF-8 character (unexpected continuation byte 0x%02x)",
245 uv = (uv << 6) | (*s & 0x3f);
248 Perl_warner(aTHX_ WARN_UTF8,
249 "Malformed UTF-8 character (overflow at 0x%"UVxf", byte 0x%02x)",
257 if (uv >= 0xd800 && uv <= 0xdfff) {
259 Perl_warner(aTHX_ WARN_UTF8,
260 "Malformed UTF-8 character (UTF-16 surrogate 0x%04"UVxf")",
263 } else if (uv == 0xfffe) {
265 Perl_warner(aTHX_ WARN_UTF8,
266 "Malformed UTF-8 character (byte order mark 0x%04"UVxf")",
269 } else if (uv == 0xffff && IN_UTF8) {
271 Perl_warner(aTHX_ WARN_UTF8,
272 "Malformed UTF-8 character (impossible character 0x%04"UVxf")",
275 } else if (expectlen > UTF8LEN(uv)) {
277 Perl_warner(aTHX_ WARN_UTF8,
278 "Malformed UTF-8 character (%d byte%s, need %d)",
279 expectlen, expectlen > 1 ? "s": "", UTF8LEN(uv));
296 return UNICODE_REPLACEMENT_CHARACTER;
300 =for apidoc Am|U8* s|utf8_to_uv|STRLEN *retlen
302 Returns the character value of the first character in the string C<s>
303 which is assumed to be in UTF8 encoding; C<retlen> will be set to the
304 length, in bytes, of that character, and the pointer C<s> will be
305 advanced to the end of the character.
307 If C<s> does not point to a well-formed UTF8 character, zero is
308 returned and retlen is set, if possible, to -1.
314 Perl_utf8_to_uv(pTHX_ U8* s, STRLEN* retlen)
316 return Perl_utf8_to_uv_chk(aTHX_ s, (STRLEN)-1, retlen, 0);
319 /* utf8_distance(a,b) returns the number of UTF8 characters between
320 the pointers a and b */
323 Perl_utf8_distance(pTHX_ U8 *a, U8 *b)
341 /* WARNING: do not use the following unless you *know* off is within bounds */
344 Perl_utf8_hop(pTHX_ U8 *s, I32 off)
354 while ((*s & 0xc0) == 0x80)
363 =for apidoc Am|U8 *|utf8_to_bytes|U8 *s|STRLEN *len
365 Converts a string C<s> of length C<len> from UTF8 into byte encoding.
366 Unlike C<bytes_to_utf8>, this over-writes the original string, and
367 updates len to contain the new length.
368 Returns zero on failure, setting C<len> to -1.
374 Perl_utf8_to_bytes(pTHX_ U8* s, STRLEN *len)
384 /* ensure valid UTF8 and chars < 256 before updating string */
388 ( (s >= send) || ((*s++ & 0xc0) != 0x80) || ((c & 0xfe) != 0xc2))) {
399 *d++ = (U8)utf8_to_uv(s, &ulen);
409 =for apidoc Am|U8 *|bytes_to_utf8|U8 *s|STRLEN *len
411 Converts a string C<s> of length C<len> from ASCII into UTF8 encoding.
412 Returns a pointer to the newly-created string, and sets C<len> to
413 reflect the new length.
419 Perl_bytes_to_utf8(pTHX_ U8* s, STRLEN *len)
427 Newz(801, d, (*len) * 2 + 1, U8);
435 *d++ = (( uv >> 6) | 0xc0);
436 *d++ = (( uv & 0x3f) | 0x80);
445 * Convert native (big-endian) or reversed (little-endian) UTF-16 to UTF-8.
447 * Destination must be pre-extended to 3/2 source. Do not use in-place.
448 * We optimize for native, for obvious reasons. */
451 Perl_utf16_to_utf8(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen)
457 Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen");
462 UV uv = (p[0] << 8) + p[1]; /* UTF-16BE */
469 *d++ = (( uv >> 6) | 0xc0);
470 *d++ = (( uv & 0x3f) | 0x80);
473 if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */
476 if (low < 0xdc00 || low >= 0xdfff)
477 Perl_croak(aTHX_ "Malformed UTF-16 surrogate");
478 uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000;
481 *d++ = (( uv >> 12) | 0xe0);
482 *d++ = (((uv >> 6) & 0x3f) | 0x80);
483 *d++ = (( uv & 0x3f) | 0x80);
487 *d++ = (( uv >> 18) | 0xf0);
488 *d++ = (((uv >> 12) & 0x3f) | 0x80);
489 *d++ = (((uv >> 6) & 0x3f) | 0x80);
490 *d++ = (( uv & 0x3f) | 0x80);
494 *newlen = d - dstart;
498 /* Note: this one is slightly destructive of the source. */
501 Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen)
504 U8* send = s + bytelen;
511 return utf16_to_utf8(p, d, bytelen, newlen);
514 /* for now these are all defined (inefficiently) in terms of the utf8 versions */
517 Perl_is_uni_alnum(pTHX_ U32 c)
519 U8 tmpbuf[UTF8_MAXLEN];
520 uv_to_utf8(tmpbuf, (UV)c);
521 return is_utf8_alnum(tmpbuf);
525 Perl_is_uni_alnumc(pTHX_ U32 c)
527 U8 tmpbuf[UTF8_MAXLEN];
528 uv_to_utf8(tmpbuf, (UV)c);
529 return is_utf8_alnumc(tmpbuf);
533 Perl_is_uni_idfirst(pTHX_ U32 c)
535 U8 tmpbuf[UTF8_MAXLEN];
536 uv_to_utf8(tmpbuf, (UV)c);
537 return is_utf8_idfirst(tmpbuf);
541 Perl_is_uni_alpha(pTHX_ U32 c)
543 U8 tmpbuf[UTF8_MAXLEN];
544 uv_to_utf8(tmpbuf, (UV)c);
545 return is_utf8_alpha(tmpbuf);
549 Perl_is_uni_ascii(pTHX_ U32 c)
551 U8 tmpbuf[UTF8_MAXLEN];
552 uv_to_utf8(tmpbuf, (UV)c);
553 return is_utf8_ascii(tmpbuf);
557 Perl_is_uni_space(pTHX_ U32 c)
559 U8 tmpbuf[UTF8_MAXLEN];
560 uv_to_utf8(tmpbuf, (UV)c);
561 return is_utf8_space(tmpbuf);
565 Perl_is_uni_digit(pTHX_ U32 c)
567 U8 tmpbuf[UTF8_MAXLEN];
568 uv_to_utf8(tmpbuf, (UV)c);
569 return is_utf8_digit(tmpbuf);
573 Perl_is_uni_upper(pTHX_ U32 c)
575 U8 tmpbuf[UTF8_MAXLEN];
576 uv_to_utf8(tmpbuf, (UV)c);
577 return is_utf8_upper(tmpbuf);
581 Perl_is_uni_lower(pTHX_ U32 c)
583 U8 tmpbuf[UTF8_MAXLEN];
584 uv_to_utf8(tmpbuf, (UV)c);
585 return is_utf8_lower(tmpbuf);
589 Perl_is_uni_cntrl(pTHX_ U32 c)
591 U8 tmpbuf[UTF8_MAXLEN];
592 uv_to_utf8(tmpbuf, (UV)c);
593 return is_utf8_cntrl(tmpbuf);
597 Perl_is_uni_graph(pTHX_ U32 c)
599 U8 tmpbuf[UTF8_MAXLEN];
600 uv_to_utf8(tmpbuf, (UV)c);
601 return is_utf8_graph(tmpbuf);
605 Perl_is_uni_print(pTHX_ U32 c)
607 U8 tmpbuf[UTF8_MAXLEN];
608 uv_to_utf8(tmpbuf, (UV)c);
609 return is_utf8_print(tmpbuf);
613 Perl_is_uni_punct(pTHX_ U32 c)
615 U8 tmpbuf[UTF8_MAXLEN];
616 uv_to_utf8(tmpbuf, (UV)c);
617 return is_utf8_punct(tmpbuf);
621 Perl_is_uni_xdigit(pTHX_ U32 c)
623 U8 tmpbuf[UTF8_MAXLEN];
624 uv_to_utf8(tmpbuf, (UV)c);
625 return is_utf8_xdigit(tmpbuf);
629 Perl_to_uni_upper(pTHX_ U32 c)
631 U8 tmpbuf[UTF8_MAXLEN];
632 uv_to_utf8(tmpbuf, (UV)c);
633 return to_utf8_upper(tmpbuf);
637 Perl_to_uni_title(pTHX_ U32 c)
639 U8 tmpbuf[UTF8_MAXLEN];
640 uv_to_utf8(tmpbuf, (UV)c);
641 return to_utf8_title(tmpbuf);
645 Perl_to_uni_lower(pTHX_ U32 c)
647 U8 tmpbuf[UTF8_MAXLEN];
648 uv_to_utf8(tmpbuf, (UV)c);
649 return to_utf8_lower(tmpbuf);
652 /* for now these all assume no locale info available for Unicode > 255 */
655 Perl_is_uni_alnum_lc(pTHX_ U32 c)
657 return is_uni_alnum(c); /* XXX no locale support yet */
661 Perl_is_uni_alnumc_lc(pTHX_ U32 c)
663 return is_uni_alnumc(c); /* XXX no locale support yet */
667 Perl_is_uni_idfirst_lc(pTHX_ U32 c)
669 return is_uni_idfirst(c); /* XXX no locale support yet */
673 Perl_is_uni_alpha_lc(pTHX_ U32 c)
675 return is_uni_alpha(c); /* XXX no locale support yet */
679 Perl_is_uni_ascii_lc(pTHX_ U32 c)
681 return is_uni_ascii(c); /* XXX no locale support yet */
685 Perl_is_uni_space_lc(pTHX_ U32 c)
687 return is_uni_space(c); /* XXX no locale support yet */
691 Perl_is_uni_digit_lc(pTHX_ U32 c)
693 return is_uni_digit(c); /* XXX no locale support yet */
697 Perl_is_uni_upper_lc(pTHX_ U32 c)
699 return is_uni_upper(c); /* XXX no locale support yet */
703 Perl_is_uni_lower_lc(pTHX_ U32 c)
705 return is_uni_lower(c); /* XXX no locale support yet */
709 Perl_is_uni_cntrl_lc(pTHX_ U32 c)
711 return is_uni_cntrl(c); /* XXX no locale support yet */
715 Perl_is_uni_graph_lc(pTHX_ U32 c)
717 return is_uni_graph(c); /* XXX no locale support yet */
721 Perl_is_uni_print_lc(pTHX_ U32 c)
723 return is_uni_print(c); /* XXX no locale support yet */
727 Perl_is_uni_punct_lc(pTHX_ U32 c)
729 return is_uni_punct(c); /* XXX no locale support yet */
733 Perl_is_uni_xdigit_lc(pTHX_ U32 c)
735 return is_uni_xdigit(c); /* XXX no locale support yet */
739 Perl_to_uni_upper_lc(pTHX_ U32 c)
741 return to_uni_upper(c); /* XXX no locale support yet */
745 Perl_to_uni_title_lc(pTHX_ U32 c)
747 return to_uni_title(c); /* XXX no locale support yet */
751 Perl_to_uni_lower_lc(pTHX_ U32 c)
753 return to_uni_lower(c); /* XXX no locale support yet */
757 Perl_is_utf8_alnum(pTHX_ U8 *p)
759 if (!is_utf8_char(p))
762 /* NOTE: "IsWord", not "IsAlnum", since Alnum is a true
763 * descendant of isalnum(3), in other words, it doesn't
764 * contain the '_'. --jhi */
765 PL_utf8_alnum = swash_init("utf8", "IsWord", &PL_sv_undef, 0, 0);
766 return swash_fetch(PL_utf8_alnum, p);
767 /* return *p == '_' || is_utf8_alpha(p) || is_utf8_digit(p); */
768 #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */
770 PL_utf8_alnum = swash_init("utf8", "",
771 sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0);
772 return swash_fetch(PL_utf8_alnum, p);
777 Perl_is_utf8_alnumc(pTHX_ U8 *p)
779 if (!is_utf8_char(p))
782 PL_utf8_alnum = swash_init("utf8", "IsAlnumC", &PL_sv_undef, 0, 0);
783 return swash_fetch(PL_utf8_alnum, p);
784 /* return is_utf8_alpha(p) || is_utf8_digit(p); */
785 #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */
787 PL_utf8_alnum = swash_init("utf8", "",
788 sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0);
789 return swash_fetch(PL_utf8_alnum, p);
794 Perl_is_utf8_idfirst(pTHX_ U8 *p)
796 return *p == '_' || is_utf8_alpha(p);
800 Perl_is_utf8_alpha(pTHX_ U8 *p)
802 if (!is_utf8_char(p))
805 PL_utf8_alpha = swash_init("utf8", "IsAlpha", &PL_sv_undef, 0, 0);
806 return swash_fetch(PL_utf8_alpha, p);
810 Perl_is_utf8_ascii(pTHX_ U8 *p)
812 if (!is_utf8_char(p))
815 PL_utf8_ascii = swash_init("utf8", "IsAscii", &PL_sv_undef, 0, 0);
816 return swash_fetch(PL_utf8_ascii, p);
820 Perl_is_utf8_space(pTHX_ U8 *p)
822 if (!is_utf8_char(p))
825 PL_utf8_space = swash_init("utf8", "IsSpace", &PL_sv_undef, 0, 0);
826 return swash_fetch(PL_utf8_space, p);
830 Perl_is_utf8_digit(pTHX_ U8 *p)
832 if (!is_utf8_char(p))
835 PL_utf8_digit = swash_init("utf8", "IsDigit", &PL_sv_undef, 0, 0);
836 return swash_fetch(PL_utf8_digit, p);
840 Perl_is_utf8_upper(pTHX_ U8 *p)
842 if (!is_utf8_char(p))
845 PL_utf8_upper = swash_init("utf8", "IsUpper", &PL_sv_undef, 0, 0);
846 return swash_fetch(PL_utf8_upper, p);
850 Perl_is_utf8_lower(pTHX_ U8 *p)
852 if (!is_utf8_char(p))
855 PL_utf8_lower = swash_init("utf8", "IsLower", &PL_sv_undef, 0, 0);
856 return swash_fetch(PL_utf8_lower, p);
860 Perl_is_utf8_cntrl(pTHX_ U8 *p)
862 if (!is_utf8_char(p))
865 PL_utf8_cntrl = swash_init("utf8", "IsCntrl", &PL_sv_undef, 0, 0);
866 return swash_fetch(PL_utf8_cntrl, p);
870 Perl_is_utf8_graph(pTHX_ U8 *p)
872 if (!is_utf8_char(p))
875 PL_utf8_graph = swash_init("utf8", "IsGraph", &PL_sv_undef, 0, 0);
876 return swash_fetch(PL_utf8_graph, p);
880 Perl_is_utf8_print(pTHX_ U8 *p)
882 if (!is_utf8_char(p))
885 PL_utf8_print = swash_init("utf8", "IsPrint", &PL_sv_undef, 0, 0);
886 return swash_fetch(PL_utf8_print, p);
890 Perl_is_utf8_punct(pTHX_ U8 *p)
892 if (!is_utf8_char(p))
895 PL_utf8_punct = swash_init("utf8", "IsPunct", &PL_sv_undef, 0, 0);
896 return swash_fetch(PL_utf8_punct, p);
900 Perl_is_utf8_xdigit(pTHX_ U8 *p)
902 if (!is_utf8_char(p))
905 PL_utf8_xdigit = swash_init("utf8", "IsXDigit", &PL_sv_undef, 0, 0);
906 return swash_fetch(PL_utf8_xdigit, p);
910 Perl_is_utf8_mark(pTHX_ U8 *p)
912 if (!is_utf8_char(p))
915 PL_utf8_mark = swash_init("utf8", "IsM", &PL_sv_undef, 0, 0);
916 return swash_fetch(PL_utf8_mark, p);
920 Perl_to_utf8_upper(pTHX_ U8 *p)
924 if (!PL_utf8_toupper)
925 PL_utf8_toupper = swash_init("utf8", "ToUpper", &PL_sv_undef, 4, 0);
926 uv = swash_fetch(PL_utf8_toupper, p);
927 return uv ? uv : utf8_to_uv_chk(p,STRLEN_MAX,0,0);
931 Perl_to_utf8_title(pTHX_ U8 *p)
935 if (!PL_utf8_totitle)
936 PL_utf8_totitle = swash_init("utf8", "ToTitle", &PL_sv_undef, 4, 0);
937 uv = swash_fetch(PL_utf8_totitle, p);
938 return uv ? uv : utf8_to_uv_chk(p,STRLEN_MAX,0,0);
942 Perl_to_utf8_lower(pTHX_ U8 *p)
946 if (!PL_utf8_tolower)
947 PL_utf8_tolower = swash_init("utf8", "ToLower", &PL_sv_undef, 4, 0);
948 uv = swash_fetch(PL_utf8_tolower, p);
949 return uv ? uv : utf8_to_uv_chk(p,STRLEN_MAX,0,0);
952 /* a "swash" is a swatch hash */
955 Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none)
961 if (!gv_stashpv(pkg, 0)) { /* demand load utf8 */
963 Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpv(pkg,0), Nullsv);
967 PUSHSTACKi(PERLSI_MAGIC);
970 PUSHs(sv_2mortal(newSVpvn(pkg, strlen(pkg))));
971 PUSHs(sv_2mortal(newSVpvn(name, strlen(name))));
973 PUSHs(sv_2mortal(newSViv(minbits)));
974 PUSHs(sv_2mortal(newSViv(none)));
980 if (PL_curcop == &PL_compiling) /* XXX ought to be handled by lex_start */
981 strncpy(tmpbuf, PL_tokenbuf, sizeof tmpbuf);
982 if (call_method("SWASHNEW", G_SCALAR))
983 retval = newSVsv(*PL_stack_sp--);
985 retval = &PL_sv_undef;
988 if (PL_curcop == &PL_compiling) {
989 strncpy(PL_tokenbuf, tmpbuf, sizeof tmpbuf);
990 PL_curcop->op_private = PL_hints;
992 if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV)
993 Perl_croak(aTHX_ "SWASHNEW didn't return an HV ref");
998 Perl_swash_fetch(pTHX_ SV *sv, U8 *ptr)
1000 HV* hv = (HV*)SvRV(sv);
1001 U32 klen = UTF8SKIP(ptr) - 1;
1002 U32 off = ptr[klen] & 127; /* NB: 64 bit always 0 when len > 1 */
1004 STRLEN needents = (klen ? 64 : 128);
1010 * This single-entry cache saves about 1/3 of the utf8 overhead in test
1011 * suite. (That is, only 7-8% overall over just a hash cache. Still,
1012 * it's nothing to sniff at.) Pity we usually come through at least
1013 * two function calls to get here...
1015 * NB: this code assumes that swatches are never modified, once generated!
1018 if (hv == PL_last_swash_hv &&
1019 klen == PL_last_swash_klen &&
1020 (!klen || memEQ((char *)ptr,(char *)PL_last_swash_key,klen)) )
1022 tmps = PL_last_swash_tmps;
1023 slen = PL_last_swash_slen;
1026 /* Try our second-level swatch cache, kept in a hash. */
1027 SV** svp = hv_fetch(hv, (char*)ptr, klen, FALSE);
1029 /* If not cached, generate it via utf8::SWASHGET */
1030 if (!svp || !SvPOK(*svp) || !(tmps = (U8*)SvPV(*svp, slen))) {
1035 PUSHSTACKi(PERLSI_MAGIC);
1039 PUSHs(sv_2mortal(newSViv(utf8_to_uv_chk(ptr, STRLEN_MAX, 0, 0) & ~(needents - 1))));
1040 PUSHs(sv_2mortal(newSViv(needents)));
1042 if (call_method("SWASHGET", G_SCALAR))
1043 retval = newSVsv(*PL_stack_sp--);
1045 retval = &PL_sv_undef;
1049 if (PL_curcop == &PL_compiling)
1050 PL_curcop->op_private = PL_hints;
1052 svp = hv_store(hv, (char*)ptr, klen, retval, 0);
1054 if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || slen < 8)
1055 Perl_croak(aTHX_ "SWASHGET didn't return result of proper length");
1058 PL_last_swash_hv = hv;
1059 PL_last_swash_klen = klen;
1060 PL_last_swash_tmps = tmps;
1061 PL_last_swash_slen = slen;
1063 Copy(ptr, PL_last_swash_key, klen, U8);
1066 switch ((slen << 3) / needents) {
1068 bit = 1 << (off & 7);
1070 return (tmps[off] & bit) != 0;
1075 return (tmps[off] << 8) + tmps[off + 1] ;
1078 return (tmps[off] << 24) + (tmps[off+1] << 16) + (tmps[off+2] << 8) + tmps[off + 3] ;
1080 Perl_croak(aTHX_ "panic: swash_fetch");