1 /*
2 $Id: Encode.xs,v 2.6 2005/09/08 14:17:17 dankogai Exp dankogai $
3 */
4
5 #define PERL_NO_GET_CONTEXT
6 #include "EXTERN.h"
7 #include "perl.h"
8 #include "XSUB.h"
9 #define U8 U8
10 #include "encode.h"
11
12 # define PERLIO_MODNAME "PerlIO::encoding"
13 # define PERLIO_FILENAME "PerlIO/encoding.pm"
14
15 /* set 1 or more to profile. t/encoding.t dumps core because of
16 Perl_warner and PerlIO don't work well */
17 #define ENCODE_XS_PROFILE 0
18
19 /* set 0 to disable floating point to calculate buffer size for
20 encode_method(). 1 is recommended. 2 restores NI-S original */
21 #define ENCODE_XS_USEFP 1
22
23 #define UNIMPLEMENTED(x,y) y x (SV *sv, char *encoding) {dTHX; \
24 Perl_croak(aTHX_ "panic_unimplemented"); \
25 return (y)0; /* fool picky compilers */ \
26 }
27 /**/
28
29 UNIMPLEMENTED(_encoded_utf8_to_bytes, I32)
30 UNIMPLEMENTED(_encoded_bytes_to_utf8, I32)
31
32 #define UTF8_ALLOW_STRICT 0
33 #define UTF8_ALLOW_NONSTRICT (UTF8_ALLOW_ANY & \
34 ~(UTF8_ALLOW_CONTINUATION | \
35 UTF8_ALLOW_NON_CONTINUATION | \
36 UTF8_ALLOW_LONG))
37
38 static SV* fallback_cb = (SV*)NULL ;
39
40 void
Encode_XSEncoding(pTHX_ encode_t * enc)41 Encode_XSEncoding(pTHX_ encode_t * enc)
42 {
43 dSP;
44 HV *stash = gv_stashpv("Encode::XS", TRUE);
45 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(enc))), stash);
46 int i = 0;
47 PUSHMARK(sp);
48 XPUSHs(sv);
49 while (enc->name[i]) {
50 const char *name = enc->name[i++];
51 XPUSHs(sv_2mortal(newSVpvn(name, strlen(name))));
52 }
53 PUTBACK;
54 call_pv("Encode::define_encoding", G_DISCARD);
55 SvREFCNT_dec(sv);
56 }
57
58 void
call_failure(SV * routine,U8 * done,U8 * dest,U8 * orig)59 call_failure(SV * routine, U8 * done, U8 * dest, U8 * orig)
60 {
61 /* Exists for breakpointing */
62 }
63
64
65 #define ERR_ENCODE_NOMAP "\"\\x{%04" UVxf "}\" does not map to %s"
66 #define ERR_DECODE_NOMAP "%s \"\\x%02" UVXf "\" does not map to Unicode"
67
68 static SV *
do_fallback_cb(pTHX_ UV ch)69 do_fallback_cb(pTHX_ UV ch)
70 {
71 dSP;
72 int argc;
73 SV* retval;
74 ENTER;
75 SAVETMPS;
76 PUSHMARK(sp);
77 XPUSHs(sv_2mortal(newSVnv((UV)ch)));
78 PUTBACK;
79 argc = call_sv(fallback_cb, G_SCALAR);
80 SPAGAIN;
81 if (argc != 1){
82 croak("fallback sub must return scalar!");
83 }
84 retval = newSVsv(POPs);
85 PUTBACK;
86 FREETMPS;
87 LEAVE;
88 return retval;
89 }
90
91 static SV *
encode_method(pTHX_ encode_t * enc,encpage_t * dir,SV * src,int check,STRLEN * offset,SV * term,int * retcode)92 encode_method(pTHX_ encode_t * enc, encpage_t * dir, SV * src,
93 int check, STRLEN * offset, SV * term, int * retcode)
94 {
95 STRLEN slen;
96 U8 *s = (U8 *) SvPV(src, slen);
97 STRLEN tlen = slen;
98 STRLEN ddone = 0;
99 STRLEN sdone = 0;
100
101 /* We allocate slen+1.
102 PerlIO dumps core if this value is smaller than this. */
103 SV *dst = sv_2mortal(newSV(slen+1));
104 U8 *d = (U8 *)SvPVX(dst);
105 STRLEN dlen = SvLEN(dst)-1;
106 int code = 0;
107 STRLEN trmlen = 0;
108 U8 *trm = term ? (U8*) SvPV(term, trmlen) : NULL;
109
110 if (offset) {
111 s += *offset;
112 if (slen > *offset){ /* safeguard against slen overflow */
113 slen -= *offset;
114 }else{
115 slen = 0;
116 }
117 tlen = slen;
118 }
119
120 if (slen == 0){
121 SvCUR_set(dst, 0);
122 SvPOK_only(dst);
123 goto ENCODE_END;
124 }
125
126 while( (code = do_encode(dir, s, &slen, d, dlen, &dlen, !check,
127 trm, trmlen)) )
128 {
129 SvCUR_set(dst, dlen+ddone);
130 SvPOK_only(dst);
131
132 if (code == ENCODE_FALLBACK || code == ENCODE_PARTIAL ||
133 code == ENCODE_FOUND_TERM) {
134 break;
135 }
136 switch (code) {
137 case ENCODE_NOSPACE:
138 {
139 STRLEN more = 0; /* make sure you initialize! */
140 STRLEN sleft;
141 sdone += slen;
142 ddone += dlen;
143 sleft = tlen - sdone;
144 #if ENCODE_XS_PROFILE >= 2
145 Perl_warn(aTHX_
146 "more=%d, sdone=%d, sleft=%d, SvLEN(dst)=%d\n",
147 more, sdone, sleft, SvLEN(dst));
148 #endif
149 if (sdone != 0) { /* has src ever been processed ? */
150 #if ENCODE_XS_USEFP == 2
151 more = (1.0*tlen*SvLEN(dst)+sdone-1)/sdone
152 - SvLEN(dst);
153 #elif ENCODE_XS_USEFP
154 more = (STRLEN)((1.0*SvLEN(dst)+1)/sdone * sleft);
155 #else
156 /* safe until SvLEN(dst) == MAX_INT/16 */
157 more = (16*SvLEN(dst)+1)/sdone/16 * sleft;
158 #endif
159 }
160 more += UTF8_MAXLEN; /* insurance policy */
161 d = (U8 *) SvGROW(dst, SvLEN(dst) + more);
162 /* dst need to grow need MORE bytes! */
163 if (ddone >= SvLEN(dst)) {
164 Perl_croak(aTHX_ "Destination couldn't be grown.");
165 }
166 dlen = SvLEN(dst)-ddone-1;
167 d += ddone;
168 s += slen;
169 slen = tlen-sdone;
170 continue;
171 }
172 case ENCODE_NOREP:
173 /* encoding */
174 if (dir == enc->f_utf8) {
175 STRLEN clen;
176 UV ch =
177 utf8n_to_uvuni(s+slen, (SvCUR(src)-slen),
178 &clen, UTF8_ALLOW_ANY|UTF8_CHECK_ONLY);
179 /* if non-representable multibyte prefix at end of current buffer - break*/
180 if (clen > tlen - sdone) break;
181 if (check & ENCODE_DIE_ON_ERR) {
182 Perl_croak(aTHX_ ERR_ENCODE_NOMAP,
183 (UV)ch, enc->name[0]);
184 return &PL_sv_undef; /* never reaches but be safe */
185 }
186 if (check & ENCODE_WARN_ON_ERR){
187 Perl_warner(aTHX_ packWARN(WARN_UTF8),
188 ERR_ENCODE_NOMAP, (UV)ch, enc->name[0]);
189 }
190 if (check & ENCODE_RETURN_ON_ERR){
191 goto ENCODE_SET_SRC;
192 }
193 if (check & (ENCODE_PERLQQ|ENCODE_HTMLCREF|ENCODE_XMLCREF)){
194 SV* subchar =
195 (fallback_cb != (SV*)NULL) ? do_fallback_cb(aTHX_ ch) :
196 newSVpvf(check & ENCODE_PERLQQ ? "\\x{%04"UVxf"}" :
197 check & ENCODE_HTMLCREF ? "&#%" UVuf ";" :
198 "&#x%" UVxf ";", (UV)ch);
199 sdone += slen + clen;
200 ddone += dlen + SvCUR(subchar);
201 sv_catsv(dst, subchar);
202 SvREFCNT_dec(subchar);
203 } else {
204 /* fallback char */
205 sdone += slen + clen;
206 ddone += dlen + enc->replen;
207 sv_catpvn(dst, (char*)enc->rep, enc->replen);
208 }
209 }
210 /* decoding */
211 else {
212 if (check & ENCODE_DIE_ON_ERR){
213 Perl_croak(aTHX_ ERR_DECODE_NOMAP,
214 enc->name[0], (UV)s[slen]);
215 return &PL_sv_undef; /* never reaches but be safe */
216 }
217 if (check & ENCODE_WARN_ON_ERR){
218 Perl_warner(
219 aTHX_ packWARN(WARN_UTF8),
220 ERR_DECODE_NOMAP,
221 enc->name[0], (UV)s[slen]);
222 }
223 if (check & ENCODE_RETURN_ON_ERR){
224 goto ENCODE_SET_SRC;
225 }
226 if (check &
227 (ENCODE_PERLQQ|ENCODE_HTMLCREF|ENCODE_XMLCREF)){
228 SV* subchar =
229 (fallback_cb != (SV*)NULL) ?
230 do_fallback_cb(aTHX_ (UV)s[slen]) :
231 newSVpvf("\\x%02" UVXf, (UV)s[slen]);
232 sdone += slen + 1;
233 ddone += dlen + SvCUR(subchar);
234 sv_catsv(dst, subchar);
235 SvREFCNT_dec(subchar);
236 } else {
237 sdone += slen + 1;
238 ddone += dlen + strlen(FBCHAR_UTF8);
239 sv_catpv(dst, FBCHAR_UTF8);
240 }
241 }
242 /* settle variables when fallback */
243 d = (U8 *)SvEND(dst);
244 dlen = SvLEN(dst) - ddone - 1;
245 s = (U8*)SvPVX(src) + sdone;
246 slen = tlen - sdone;
247 break;
248
249 default:
250 Perl_croak(aTHX_ "Unexpected code %d converting %s %s",
251 code, (dir == enc->f_utf8) ? "to" : "from",
252 enc->name[0]);
253 return &PL_sv_undef;
254 }
255 }
256 ENCODE_SET_SRC:
257 if (check && !(check & ENCODE_LEAVE_SRC)){
258 sdone = SvCUR(src) - (slen+sdone);
259 if (sdone) {
260 sv_setpvn(src, (char*)s+slen, sdone);
261 }
262 SvCUR_set(src, sdone);
263 }
264 /* warn("check = 0x%X, code = 0x%d\n", check, code); */
265
266 SvCUR_set(dst, dlen+ddone);
267 SvPOK_only(dst);
268
269 #if ENCODE_XS_PROFILE
270 if (SvCUR(dst) > SvCUR(src)){
271 Perl_warn(aTHX_
272 "SvLEN(dst)=%d, SvCUR(dst)=%d. %d bytes unused(%f %%)\n",
273 SvLEN(dst), SvCUR(dst), SvLEN(dst) - SvCUR(dst),
274 (SvLEN(dst) - SvCUR(dst))*1.0/SvLEN(dst)*100.0);
275 }
276 #endif
277
278 if (offset)
279 *offset += sdone + slen;
280
281 ENCODE_END:
282 *SvEND(dst) = '\0';
283 if (retcode) *retcode = code;
284 return dst;
285 }
286
287 static bool
strict_utf8(pTHX_ SV * sv)288 strict_utf8(pTHX_ SV* sv)
289 {
290 HV* hv;
291 SV** svp;
292 sv = SvRV(sv);
293 if (!sv || SvTYPE(sv) != SVt_PVHV)
294 return 0;
295 hv = (HV*)sv;
296 svp = hv_fetch(hv, "strict_utf8", 11, 0);
297 if (!svp)
298 return 0;
299 return SvTRUE(*svp);
300 }
301
302 static U8*
process_utf8(pTHX_ SV * dst,U8 * s,U8 * e,int check,bool encode,bool strict,bool stop_at_partial)303 process_utf8(pTHX_ SV* dst, U8* s, U8* e, int check,
304 bool encode, bool strict, bool stop_at_partial)
305 {
306 UV uv;
307 STRLEN ulen;
308
309 SvPOK_only(dst);
310 SvCUR_set(dst,0);
311
312 while (s < e) {
313 if (UTF8_IS_INVARIANT(*s)) {
314 sv_catpvn(dst, (char *)s, 1);
315 s++;
316 continue;
317 }
318
319 if (UTF8_IS_START(*s)) {
320 U8 skip = UTF8SKIP(s);
321 if ((s + skip) > e) {
322 /* Partial character */
323 /* XXX could check that rest of bytes are UTF8_IS_CONTINUATION(ch) */
324 if (stop_at_partial || (check & ENCODE_STOP_AT_PARTIAL))
325 break;
326
327 goto malformed_byte;
328 }
329
330 uv = utf8n_to_uvuni(s, e - s, &ulen,
331 UTF8_CHECK_ONLY | (strict ? UTF8_ALLOW_STRICT :
332 UTF8_ALLOW_NONSTRICT)
333 );
334 #if 1 /* perl-5.8.6 and older do not check UTF8_ALLOW_LONG */
335 if (strict && uv > PERL_UNICODE_MAX)
336 ulen = -1;
337 #endif
338 if (ulen == -1) {
339 if (strict) {
340 uv = utf8n_to_uvuni(s, e - s, &ulen,
341 UTF8_CHECK_ONLY | UTF8_ALLOW_NONSTRICT);
342 if (ulen == -1)
343 goto malformed_byte;
344 goto malformed;
345 }
346 goto malformed_byte;
347 }
348
349
350 /* Whole char is good */
351 sv_catpvn(dst,(char *)s,skip);
352 s += skip;
353 continue;
354 }
355
356 /* If we get here there is something wrong with alleged UTF-8 */
357 malformed_byte:
358 uv = (UV)*s;
359 ulen = 1;
360
361 malformed:
362 if (check & ENCODE_DIE_ON_ERR){
363 if (encode)
364 Perl_croak(aTHX_ ERR_ENCODE_NOMAP, uv, "utf8");
365 else
366 Perl_croak(aTHX_ ERR_DECODE_NOMAP, "utf8", uv);
367 }
368 if (check & ENCODE_WARN_ON_ERR){
369 if (encode)
370 Perl_warner(aTHX_ packWARN(WARN_UTF8),
371 ERR_ENCODE_NOMAP, uv, "utf8");
372 else
373 Perl_warner(aTHX_ packWARN(WARN_UTF8),
374 ERR_DECODE_NOMAP, "utf8", uv);
375 }
376 if (check & ENCODE_RETURN_ON_ERR) {
377 break;
378 }
379 if (check & (ENCODE_PERLQQ|ENCODE_HTMLCREF|ENCODE_XMLCREF)){
380 SV* subchar = newSVpvf(check & ENCODE_PERLQQ ? (ulen == 1 ? "\\x%02" UVXf : "\\x{%04" UVXf "}"):
381 check & ENCODE_HTMLCREF ? "&#%" UVuf ";" :
382 "&#x%" UVxf ";", uv);
383 sv_catsv(dst, subchar);
384 SvREFCNT_dec(subchar);
385 } else {
386 sv_catpv(dst, FBCHAR_UTF8);
387 }
388 s += ulen;
389 }
390 *SvEND(dst) = '\0';
391
392 return s;
393 }
394
395
396 MODULE = Encode PACKAGE = Encode::utf8 PREFIX = Method_
397
398 PROTOTYPES: DISABLE
399
400 void
401 Method_decode_xs(obj,src,check = 0)
402 SV * obj
403 SV * src
404 int check
405 CODE:
406 {
407 STRLEN slen;
408 U8 *s = (U8 *) SvPV(src, slen);
409 U8 *e = (U8 *) SvEND(src);
410 SV *dst = newSV(slen>0?slen:1); /* newSV() abhors 0 -- inaba */
411
412 /*
413 * PerlIO check -- we assume the object is of PerlIO if renewed
414 */
415 int renewed = 0;
416 dSP; ENTER; SAVETMPS;
417 PUSHMARK(sp);
418 XPUSHs(obj);
419 PUTBACK;
420 if (call_method("renewed",G_SCALAR) == 1) {
421 SPAGAIN;
422 renewed = POPi;
423 PUTBACK;
424 #if 0
425 fprintf(stderr, "renewed == %d\n", renewed);
426 #endif
427 }
428 FREETMPS; LEAVE;
429 /* end PerlIO check */
430
431 if (SvUTF8(src)) {
432 s = utf8_to_bytes(s,&slen);
433 if (s) {
434 SvCUR_set(src,slen);
435 SvUTF8_off(src);
436 e = s+slen;
437 }
438 else {
439 croak("Cannot decode string with wide characters");
440 }
441 }
442
443 s = process_utf8(aTHX_ dst, s, e, check, 0, strict_utf8(aTHX_ obj), renewed);
444
445 /* Clear out translated part of source unless asked not to */
446 if (check && !(check & ENCODE_LEAVE_SRC)){
447 slen = e-s;
448 if (slen) {
449 sv_setpvn(src, (char*)s, slen);
450 }
451 SvCUR_set(src, slen);
452 }
453 SvUTF8_on(dst);
454 ST(0) = sv_2mortal(dst);
455 XSRETURN(1);
456 }
457
458 void
459 Method_encode_xs(obj,src,check = 0)
460 SV * obj
461 SV * src
462 int check
463 CODE:
464 {
465 STRLEN slen;
466 U8 *s = (U8 *) SvPV(src, slen);
467 U8 *e = (U8 *) SvEND(src);
468 SV *dst = newSV(slen>0?slen:1); /* newSV() abhors 0 -- inaba */
469 if (SvUTF8(src)) {
470 /* Already encoded */
471 if (strict_utf8(aTHX_ obj)) {
472 s = process_utf8(aTHX_ dst, s, e, check, 1, 1, 0);
473 }
474 else {
475 /* trust it and just copy the octets */
476 sv_setpvn(dst,(char *)s,(e-s));
477 s = e;
478 }
479 }
480 else {
481 /* Native bytes - can always encode */
482 U8 *d = (U8 *) SvGROW(dst, 2*slen+1); /* +1 or assertion will botch */
483 while (s < e) {
484 UV uv = NATIVE_TO_UNI((UV) *s++);
485 if (UNI_IS_INVARIANT(uv))
486 *d++ = (U8)UTF_TO_NATIVE(uv);
487 else {
488 *d++ = (U8)UTF8_EIGHT_BIT_HI(uv);
489 *d++ = (U8)UTF8_EIGHT_BIT_LO(uv);
490 }
491 }
492 SvCUR_set(dst, d- (U8 *)SvPVX(dst));
493 *SvEND(dst) = '\0';
494 }
495
496 /* Clear out translated part of source unless asked not to */
497 if (check && !(check & ENCODE_LEAVE_SRC)){
498 slen = e-s;
499 if (slen) {
500 sv_setpvn(src, (char*)s, slen);
501 }
502 SvCUR_set(src, slen);
503 }
504 SvPOK_only(dst);
505 SvUTF8_off(dst);
506 ST(0) = sv_2mortal(dst);
507 XSRETURN(1);
508 }
509
510 MODULE = Encode PACKAGE = Encode::XS PREFIX = Method_
511
512 PROTOTYPES: ENABLE
513
514 void
Method_renew(obj)515 Method_renew(obj)
516 SV * obj
517 CODE:
518 {
519 XSRETURN(1);
520 }
521
522 int
523 Method_renewed(obj)
524 SV * obj
525 CODE:
526 RETVAL = 0;
527 OUTPUT:
528 RETVAL
529
530 void
Method_name(obj)531 Method_name(obj)
532 SV * obj
533 CODE:
534 {
535 encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
536 ST(0) = sv_2mortal(newSVpvn(enc->name[0],strlen(enc->name[0])));
537 XSRETURN(1);
538 }
539
540 void
541 Method_cat_decode(obj, dst, src, off, term, check = 0)
542 SV * obj
543 SV * dst
544 SV * src
545 SV * off
546 SV * term
547 int check
548 CODE:
549 {
550 encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
551 STRLEN offset = (STRLEN)SvIV(off);
552 int code = 0;
553 if (SvUTF8(src)) {
554 sv_utf8_downgrade(src, FALSE);
555 }
556 sv_catsv(dst, encode_method(aTHX_ enc, enc->t_utf8, src, check,
557 &offset, term, &code));
558 SvIV_set(off, (IV)offset);
559 if (code == ENCODE_FOUND_TERM) {
560 ST(0) = &PL_sv_yes;
561 }else{
562 ST(0) = &PL_sv_no;
563 }
564 XSRETURN(1);
565 }
566
567 void
568 Method_decode(obj,src,check_sv = &PL_sv_no)
569 SV * obj
570 SV * src
571 SV * check_sv
572 CODE:
573 {
574 int check;
575 encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
576 if (SvUTF8(src)) {
577 sv_utf8_downgrade(src, FALSE);
578 }
579 if (SvROK(check_sv)){
580 if (fallback_cb == (SV*)NULL){
581 fallback_cb = newSVsv(check_sv); /* First time */
582 }else{
583 SvSetSV(fallback_cb, check_sv); /* Been here before */
584 }
585 check = ENCODE_PERLQQ|ENCODE_LEAVE_SRC; /* same as FB_PERLQQ */
586 }else{
587 fallback_cb = (SV*)NULL;
588 check = SvIV(check_sv);
589 }
590 ST(0) = encode_method(aTHX_ enc, enc->t_utf8, src, check,
591 NULL, Nullsv, NULL);
592 SvUTF8_on(ST(0));
593 XSRETURN(1);
594 }
595
596
597
598 void
599 Method_encode(obj,src,check_sv = &PL_sv_no)
600 SV * obj
601 SV * src
602 SV * check_sv
603 CODE:
604 {
605 int check;
606 encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
607 sv_utf8_upgrade(src);
608 if (SvROK(check_sv)){
609 if (fallback_cb == (SV*)NULL){
610 fallback_cb = newSVsv(check_sv); /* First time */
611 }else{
612 SvSetSV(fallback_cb, check_sv); /* Been here before */
613 }
614 check = ENCODE_PERLQQ|ENCODE_LEAVE_SRC; /* same as FB_PERLQQ */
615 }else{
616 fallback_cb = (SV*)NULL;
617 check = SvIV(check_sv);
618 }
619 ST(0) = encode_method(aTHX_ enc, enc->f_utf8, src, check,
620 NULL, Nullsv, NULL);
621 XSRETURN(1);
622 }
623
624 void
Method_needs_lines(obj)625 Method_needs_lines(obj)
626 SV * obj
627 CODE:
628 {
629 /* encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj))); */
630 ST(0) = &PL_sv_no;
631 XSRETURN(1);
632 }
633
634 void
Method_perlio_ok(obj)635 Method_perlio_ok(obj)
636 SV * obj
637 CODE:
638 {
639 /* encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj))); */
640 /* require_pv(PERLIO_FILENAME); */
641
642 eval_pv("require PerlIO::encoding", 0);
643
644 if (SvTRUE(get_sv("@", 0))) {
645 ST(0) = &PL_sv_no;
646 }else{
647 ST(0) = &PL_sv_yes;
648 }
649 XSRETURN(1);
650 }
651
652 MODULE = Encode PACKAGE = Encode
653
654 PROTOTYPES: ENABLE
655
656 I32
_bytes_to_utf8(sv,...)657 _bytes_to_utf8(sv, ...)
658 SV * sv
659 CODE:
660 {
661 SV * encoding = items == 2 ? ST(1) : Nullsv;
662
663 if (encoding)
664 RETVAL = _encoded_bytes_to_utf8(sv, SvPV_nolen(encoding));
665 else {
666 STRLEN len;
667 U8* s = (U8*)SvPV(sv, len);
668 U8* converted;
669
670 converted = bytes_to_utf8(s, &len); /* This allocs */
671 sv_setpvn(sv, (char *)converted, len);
672 SvUTF8_on(sv); /* XXX Should we? */
673 Safefree(converted); /* ... so free it */
674 RETVAL = len;
675 }
676 }
677 OUTPUT:
678 RETVAL
679
680 I32
_utf8_to_bytes(sv,...)681 _utf8_to_bytes(sv, ...)
682 SV * sv
683 CODE:
684 {
685 SV * to = items > 1 ? ST(1) : Nullsv;
686 SV * check = items > 2 ? ST(2) : Nullsv;
687
688 if (to) {
689 RETVAL = _encoded_utf8_to_bytes(sv, SvPV_nolen(to));
690 } else {
691 STRLEN len;
692 U8 *s = (U8*)SvPV(sv, len);
693
694 RETVAL = 0;
695 if (SvTRUE(check)) {
696 /* Must do things the slow way */
697 U8 *dest;
698 /* We need a copy to pass to check() */
699 U8 *src = (U8*)savepv((char *)s);
700 U8 *send = s + len;
701
702 New(83, dest, len, U8); /* I think */
703
704 while (s < send) {
705 if (*s < 0x80){
706 *dest++ = *s++;
707 } else {
708 STRLEN ulen;
709 UV uv = *s++;
710
711 /* Have to do it all ourselves because of error routine,
712 aargh. */
713 if (!(uv & 0x40)){ goto failure; }
714 if (!(uv & 0x20)) { ulen = 2; uv &= 0x1f; }
715 else if (!(uv & 0x10)) { ulen = 3; uv &= 0x0f; }
716 else if (!(uv & 0x08)) { ulen = 4; uv &= 0x07; }
717 else if (!(uv & 0x04)) { ulen = 5; uv &= 0x03; }
718 else if (!(uv & 0x02)) { ulen = 6; uv &= 0x01; }
719 else if (!(uv & 0x01)) { ulen = 7; uv = 0; }
720 else { ulen = 13; uv = 0; }
721
722 /* Note change to utf8.c variable naming, for variety */
723 while (ulen--) {
724 if ((*s & 0xc0) != 0x80){
725 goto failure;
726 } else {
727 uv = (uv << 6) | (*s++ & 0x3f);
728 }
729 }
730 if (uv > 256) {
731 failure:
732 call_failure(check, s, dest, src);
733 /* Now what happens? */
734 }
735 *dest++ = (U8)uv;
736 }
737 }
738 } else {
739 RETVAL = (utf8_to_bytes(s, &len) ? len : 0);
740 }
741 }
742 }
743 OUTPUT:
744 RETVAL
745
746 bool
747 is_utf8(sv, check = 0)
748 SV * sv
749 int check
750 CODE:
751 {
752 if (SvGMAGICAL(sv)) /* it could be $1, for example */
753 sv = newSVsv(sv); /* GMAGIG will be done */
754 if (SvPOK(sv)) {
755 RETVAL = SvUTF8(sv) ? TRUE : FALSE;
756 if (RETVAL &&
757 check &&
758 !is_utf8_string((U8*)SvPVX(sv), SvCUR(sv)))
759 RETVAL = FALSE;
760 } else {
761 RETVAL = FALSE;
762 }
763 if (sv != ST(0))
764 SvREFCNT_dec(sv); /* it was a temp copy */
765 }
766 OUTPUT:
767 RETVAL
768
769 SV *
_utf8_on(sv)770 _utf8_on(sv)
771 SV * sv
772 CODE:
773 {
774 if (SvPOK(sv)) {
775 SV *rsv = newSViv(SvUTF8(sv));
776 RETVAL = rsv;
777 SvUTF8_on(sv);
778 } else {
779 RETVAL = &PL_sv_undef;
780 }
781 }
782 OUTPUT:
783 RETVAL
784
785 SV *
_utf8_off(sv)786 _utf8_off(sv)
787 SV * sv
788 CODE:
789 {
790 if (SvPOK(sv)) {
791 SV *rsv = newSViv(SvUTF8(sv));
792 RETVAL = rsv;
793 SvUTF8_off(sv);
794 } else {
795 RETVAL = &PL_sv_undef;
796 }
797 }
798 OUTPUT:
799 RETVAL
800
801 int
802 DIE_ON_ERR()
803 CODE:
804 RETVAL = ENCODE_DIE_ON_ERR;
805 OUTPUT:
806 RETVAL
807
808 int
809 WARN_ON_ERR()
810 CODE:
811 RETVAL = ENCODE_WARN_ON_ERR;
812 OUTPUT:
813 RETVAL
814
815 int
816 LEAVE_SRC()
817 CODE:
818 RETVAL = ENCODE_LEAVE_SRC;
819 OUTPUT:
820 RETVAL
821
822 int
823 RETURN_ON_ERR()
824 CODE:
825 RETVAL = ENCODE_RETURN_ON_ERR;
826 OUTPUT:
827 RETVAL
828
829 int
830 PERLQQ()
831 CODE:
832 RETVAL = ENCODE_PERLQQ;
833 OUTPUT:
834 RETVAL
835
836 int
837 HTMLCREF()
838 CODE:
839 RETVAL = ENCODE_HTMLCREF;
840 OUTPUT:
841 RETVAL
842
843 int
844 XMLCREF()
845 CODE:
846 RETVAL = ENCODE_XMLCREF;
847 OUTPUT:
848 RETVAL
849
850 int
851 STOP_AT_PARTIAL()
852 CODE:
853 RETVAL = ENCODE_STOP_AT_PARTIAL;
854 OUTPUT:
855 RETVAL
856
857 int
858 FB_DEFAULT()
859 CODE:
860 RETVAL = ENCODE_FB_DEFAULT;
861 OUTPUT:
862 RETVAL
863
864 int
865 FB_CROAK()
866 CODE:
867 RETVAL = ENCODE_FB_CROAK;
868 OUTPUT:
869 RETVAL
870
871 int
872 FB_QUIET()
873 CODE:
874 RETVAL = ENCODE_FB_QUIET;
875 OUTPUT:
876 RETVAL
877
878 int
879 FB_WARN()
880 CODE:
881 RETVAL = ENCODE_FB_WARN;
882 OUTPUT:
883 RETVAL
884
885 int
886 FB_PERLQQ()
887 CODE:
888 RETVAL = ENCODE_FB_PERLQQ;
889 OUTPUT:
890 RETVAL
891
892 int
893 FB_HTMLCREF()
894 CODE:
895 RETVAL = ENCODE_FB_HTMLCREF;
896 OUTPUT:
897 RETVAL
898
899 int
900 FB_XMLCREF()
901 CODE:
902 RETVAL = ENCODE_FB_XMLCREF;
903 OUTPUT:
904 RETVAL
905
906 BOOT:
907 {
908 #include "def_t.h"
909 #include "def_t.exh"
910 }
911