1 #define PERL_NO_GET_CONTEXT
13 #define UNIMPLEMENTED(x,y) y x (SV *sv, char *encoding) {dTHX; \
14 Perl_croak(aTHX_ "panic_unimplemented"); \
15 return (y)0; /* fool picky compilers */ \
17 UNIMPLEMENTED(_encoded_utf8_to_bytes, I32)
18 UNIMPLEMENTED(_encoded_bytes_to_utf8, I32)
19 #if defined(USE_PERLIO) && !defined(USE_SFIO)
20 /* Define an encoding "layer" in the perliol.h sense.
21 The layer defined here "inherits" in an object-oriented sense from the
22 "perlio" layer with its PerlIOBuf_* "methods".
23 The implementation is particularly efficient as until Encode settles down
24 there is no point in tryint to tune it.
26 The layer works by overloading the "fill" and "flush" methods.
28 "fill" calls "SUPER::fill" in perl terms, then calls the encode OO perl API
29 to convert the encoded data to UTF-8 form, then copies it back to the
30 buffer. The "base class's" read methods then see the UTF-8 data.
32 "flush" transforms the UTF-8 data deposited by the "base class's write
33 method in the buffer back into the encoded form using the encode OO perl API,
34 then copies data back into the buffer and calls "SUPER::flush.
36 Note that "flush" is _also_ called for read mode - we still do the (back)-translate
37 so that the the base class's "flush" sees the correct number of encoded chars
38 for positioning the seek pointer. (This double translation is the worst performance
39 issue - particularly with all-perl encode engine.)
44 PerlIOBuf base; /* PerlIOBuf stuff */
45 SV *bufsv; /* buffer seen by layers above */
46 SV *dataSV; /* data we have read from layer below */
47 SV *enc; /* the encoding object */
51 PerlIOEncode_getarg(pTHX_ PerlIO * f, CLONE_PARAMS * param, int flags)
53 PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode);
54 SV *sv = &PL_sv_undef;
62 if (perl_call_method("name", G_SCALAR) == 1) {
72 PerlIOEncode_pushed(pTHX_ PerlIO * f, const char *mode, SV * arg)
74 PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode);
77 code = PerlIOBuf_pushed(aTHX_ f, mode, Nullsv);
83 if (perl_call_pv("Encode::find_encoding", G_SCALAR) != 1) {
84 /* should never happen */
85 Perl_die(aTHX_ "Encode::find_encoding did not return a value");
94 Perl_warner(aTHX_ WARN_IO, "Cannot find encoding \"%" SVf "\"",
100 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
108 PerlIOEncode_popped(pTHX_ PerlIO * f)
110 PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode);
112 SvREFCNT_dec(e->enc);
116 SvREFCNT_dec(e->bufsv);
120 SvREFCNT_dec(e->dataSV);
127 PerlIOEncode_get_base(pTHX_ PerlIO * f)
129 PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode);
131 e->base.bufsiz = 1024;
133 e->bufsv = newSV(e->base.bufsiz);
134 sv_setpvn(e->bufsv, "", 0);
136 e->base.buf = (STDCHAR *) SvPVX(e->bufsv);
138 e->base.ptr = e->base.buf;
140 e->base.end = e->base.buf;
141 if (e->base.ptr < e->base.buf
142 || e->base.ptr > e->base.buf + SvLEN(e->bufsv)) {
143 Perl_warn(aTHX_ " ptr %p(%p)%p", e->base.buf, e->base.ptr,
144 e->base.buf + SvLEN(e->bufsv));
147 if (SvLEN(e->bufsv) < e->base.bufsiz) {
148 SSize_t poff = e->base.ptr - e->base.buf;
149 SSize_t eoff = e->base.end - e->base.buf;
150 e->base.buf = (STDCHAR *) SvGROW(e->bufsv, e->base.bufsiz);
151 e->base.ptr = e->base.buf + poff;
152 e->base.end = e->base.buf + eoff;
154 if (e->base.ptr < e->base.buf
155 || e->base.ptr > e->base.buf + SvLEN(e->bufsv)) {
156 Perl_warn(aTHX_ " ptr %p(%p)%p", e->base.buf, e->base.ptr,
157 e->base.buf + SvLEN(e->bufsv));
164 PerlIOEncode_fill(pTHX_ PerlIO * f)
166 PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode);
171 if (PerlIO_flush(f) != 0)
174 if (!PerlIO_fast_gets(n)) {
175 /* Things get too messy if we don't have a buffer layer
176 push a :perlio to do the job */
178 n = PerlIO_push(aTHX_ n, &PerlIO_perlio, PerlIO_modestr(f,mode), Nullsv);
180 Perl_die(aTHX_ "panic: cannot push :perlio for %p",f);
186 avail = PerlIO_get_cnt(n);
188 avail = PerlIO_fill(n);
190 avail = PerlIO_get_cnt(n);
193 if (!PerlIO_error(n) && PerlIO_eof(n))
198 STDCHAR *ptr = PerlIO_get_ptr(n);
203 e->base.ptr = e->base.end = (STDCHAR *) Nullch;
204 (void) PerlIOEncode_get_base(aTHX_ f);
206 e->dataSV = newSV(0);
207 if (SvTYPE(e->dataSV) < SVt_PV) {
208 sv_upgrade(e->dataSV,SVt_PV);
210 if (SvCUR(e->dataSV)) {
211 /* something left over from last time - create a normal
212 SV with new data appended
214 if (use + SvCUR(e->dataSV) > e->base.bufsiz) {
215 use = e->base.bufsiz - SvCUR(e->dataSV);
217 sv_catpvn(e->dataSV,ptr,use);
220 /* Create a "dummy" SV to represent the available data from layer below */
221 if (SvLEN(e->dataSV) && SvPVX(e->dataSV)) {
222 Safefree(SvPVX(e->dataSV));
224 if (use > e->base.bufsiz) {
225 use = e->base.bufsiz;
227 SvPVX(e->dataSV) = (char *) ptr;
228 SvLEN(e->dataSV) = 0; /* Hands off sv.c - it isn't yours */
229 SvCUR_set(e->dataSV,use);
232 SvUTF8_off(e->dataSV);
238 if (perl_call_method("decode", G_SCALAR) != 1) {
239 Perl_die(aTHX_ "panic: decode did not return a value");
244 /* Now get translated string (forced to UTF-8) and use as buffer */
246 s = SvPVutf8(uni, len);
247 if (len && !is_utf8_string(s,len)) {
248 Perl_warn(aTHX_ "panic: decode did not return UTF-8 '%.*s'",(int) len,s);
253 /* if decode gave us back dataSV then data may vanish when
254 we do ptrcnt adjust - so take our copy now.
255 (The copy is a pain - need a put-it-here option for decode.)
257 sv_setpvn(e->bufsv,s,len);
258 e->base.ptr = e->base.buf = SvPVX(e->bufsv);
259 e->base.end = e->base.ptr + SvCUR(e->bufsv);
260 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
263 /* Adjust ptr/cnt not taking anything which
264 did not translate - not clear this is a win */
265 /* compute amount we took */
266 use -= SvCUR(e->dataSV);
267 PerlIO_set_ptrcnt(n, ptr+use, (avail-use));
268 /* and as we did not take it it isn't pending */
269 SvCUR_set(e->dataSV,0);
271 /* Got nothing - assume partial character so we need some more */
272 /* Make sure e->dataSV is a normal SV before re-filling as
273 buffer alias will change under us
275 s = SvPV(e->dataSV,len);
276 sv_setpvn(e->dataSV,s,len);
277 PerlIO_set_ptrcnt(n, ptr+use, (avail-use));
286 PerlIOBase(f)->flags |= PERLIO_F_EOF;
288 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
294 PerlIOEncode_flush(pTHX_ PerlIO * f)
296 PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode);
298 if (e->bufsv && (e->base.ptr > e->base.buf)) {
304 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
305 /* Write case encode the buffer and write() to layer below */
310 SvCUR_set(e->bufsv, e->base.ptr - e->base.buf);
313 Perl_warn(aTHX_ "flush %_",e->bufsv);
318 if (perl_call_method("encode", G_SCALAR) != 1)
324 count = PerlIO_write(PerlIONext(f),s,len);
330 if (PerlIO_flush(PerlIONext(f)) != 0) {
334 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
336 /* if we have any untranslated stuff then unread that first */
337 if (e->dataSV && SvCUR(e->dataSV)) {
338 s = SvPV(e->dataSV, len);
339 count = PerlIO_unread(PerlIONext(f),s,len);
344 /* See if there is anything left in the buffer */
345 if (e->base.ptr < e->base.end) {
346 /* Bother - have unread data.
347 re-encode and unread() to layer below
351 str = sv_newmortal();
352 sv_upgrade(str, SVt_PV);
353 SvPVX(str) = e->base.ptr;
355 SvCUR_set(str, e->base.end - e->base.ptr);
362 if (perl_call_method("encode", G_SCALAR) != 1)
368 count = PerlIO_unread(PerlIONext(f),s,len);
376 e->base.ptr = e->base.end = e->base.buf;
377 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
383 PerlIOEncode_close(pTHX_ PerlIO * f)
385 PerlIOEncode *e = PerlIOSelf(f, PerlIOEncode);
386 IV code = PerlIOBase_close(aTHX_ f);
388 SvREFCNT_dec(e->bufsv);
394 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
399 PerlIOEncode_tell(pTHX_ PerlIO * f)
401 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
402 /* Unfortunately the only way to get a postion is to (re-)translate,
403 the UTF8 we have in bufefr and then ask layer below
406 return PerlIO_tell(PerlIONext(f));
410 PerlIOEncode_dup(pTHX_ PerlIO * f, PerlIO * o,
411 CLONE_PARAMS * params, int flags)
413 if ((f = PerlIOBase_dup(aTHX_ f, o, params, flags))) {
414 PerlIOEncode *fe = PerlIOSelf(f, PerlIOEncode);
415 PerlIOEncode *oe = PerlIOSelf(o, PerlIOEncode);
417 fe->enc = PerlIO_sv_dup(aTHX_ oe->enc, params);
423 PerlIO_funcs PerlIO_encode = {
425 sizeof(PerlIOEncode),
444 PerlIOBase_setlinebuf,
445 PerlIOEncode_get_base,
449 PerlIOBuf_set_ptrcnt,
451 #endif /* encode layer */
454 Encode_XSEncoding(pTHX_ encode_t * enc)
457 HV *stash = gv_stashpv("Encode::XS", TRUE);
458 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(enc))), stash);
462 while (enc->name[i]) {
463 const char *name = enc->name[i++];
464 XPUSHs(sv_2mortal(newSVpvn(name, strlen(name))));
467 call_pv("Encode::define_encoding", G_DISCARD);
472 call_failure(SV * routine, U8 * done, U8 * dest, U8 * orig)
477 encode_method(pTHX_ encode_t * enc, encpage_t * dir, SV * src,
481 U8 *s = (U8 *) SvPV(src, slen);
483 SV *dst = sv_2mortal(newSV(slen+1));
485 U8 *d = (U8 *) SvPVX(dst);
486 STRLEN dlen = SvLEN(dst)-1;
488 while ((code = do_encode(dir, s, &slen, d, dlen, &dlen, !check))) {
489 SvCUR_set(dst, dlen);
493 Perl_warn(aTHX_ "code=%d @ s=%d/%d d=%d",code,slen,tlen,dlen);
496 if (code == ENCODE_FALLBACK || code == ENCODE_PARTIAL)
502 STRLEN done = tlen-slen;
505 need = (tlen*dlen)/done+1;
508 need = dlen + UTF8_MAXLEN;
511 d = (U8 *) SvGROW(dst, need);
512 if (dlen >= SvLEN(dst)) {
514 "Destination couldn't be grown (the need may be miscalculated).");
522 if (dir == enc->f_utf8) {
523 if (!check && ckWARN_d(WARN_UTF8)) {
526 utf8n_to_uvuni(s + slen, (SvCUR(src) - slen),
528 Perl_warner(aTHX_ WARN_UTF8,
530 "}\" does not map to %s", ch,
532 /* FIXME: Skip over the character, copy in replacement and continue
533 * but that is messy so for now just fail.
542 /* UTF-8 is supposed to be "Universal" so should not happen */
543 Perl_croak(aTHX_ "%s '%.*s' does not map to UTF-8",
544 enc->name[0], (int) (SvCUR(src) - slen),
550 Perl_croak(aTHX_ "Unexpected code %d converting %s %s",
551 code, (dir == enc->f_utf8) ? "to" : "from",
556 SvCUR_set(dst, dlen);
559 if (slen < SvCUR(src)) {
560 Move(s + slen, s, SvCUR(src) - slen, U8);
562 SvCUR_set(src, SvCUR(src) - slen);
574 MODULE = Encode PACKAGE = Encode::XS PREFIX = Method_
579 Method_decode(obj,src,check = FALSE)
585 encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
586 ST(0) = encode_method(aTHX_ enc, enc->t_utf8, src, check);
592 Method_encode(obj,src,check = FALSE)
598 encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
599 sv_utf8_upgrade(src);
600 ST(0) = encode_method(aTHX_ enc, enc->f_utf8, src, check);
604 MODULE = Encode PACKAGE = Encode
609 _bytes_to_utf8(sv, ...)
613 SV * encoding = items == 2 ? ST(1) : Nullsv;
616 RETVAL = _encoded_bytes_to_utf8(sv, SvPV_nolen(encoding));
619 U8* s = (U8*)SvPV(sv, len);
622 converted = bytes_to_utf8(s, &len); /* This allocs */
623 sv_setpvn(sv, (char *)converted, len);
624 SvUTF8_on(sv); /* XXX Should we? */
625 Safefree(converted); /* ... so free it */
633 _utf8_to_bytes(sv, ...)
637 SV * to = items > 1 ? ST(1) : Nullsv;
638 SV * check = items > 2 ? ST(2) : Nullsv;
641 RETVAL = _encoded_utf8_to_bytes(sv, SvPV_nolen(to));
644 U8 *s = (U8*)SvPV(sv, len);
648 /* Must do things the slow way */
650 U8 *src = (U8*)savepv((char *)s); /* We need a copy to pass to check() */
653 New(83, dest, len, U8); /* I think */
662 /* Have to do it all ourselves because of error routine,
666 if (!(uv & 0x20)) { ulen = 2; uv &= 0x1f; }
667 else if (!(uv & 0x10)) { ulen = 3; uv &= 0x0f; }
668 else if (!(uv & 0x08)) { ulen = 4; uv &= 0x07; }
669 else if (!(uv & 0x04)) { ulen = 5; uv &= 0x03; }
670 else if (!(uv & 0x02)) { ulen = 6; uv &= 0x01; }
671 else if (!(uv & 0x01)) { ulen = 7; uv = 0; }
672 else { ulen = 13; uv = 0; }
674 /* Note change to utf8.c variable naming, for variety */
676 if ((*s & 0xc0) != 0x80)
680 uv = (uv << 6) | (*s++ & 0x3f);
684 call_failure(check, s, dest, src);
685 /* Now what happens? */
691 RETVAL = (utf8_to_bytes(s, &len) ? len : 0);
698 is_utf8(sv, check = FALSE)
703 if (SvGMAGICAL(sv)) /* it could be $1, for example */
704 sv = newSVsv(sv); /* GMAGIG will be done */
706 RETVAL = SvUTF8(sv) ? TRUE : FALSE;
709 !is_utf8_string((U8*)SvPVX(sv), SvCUR(sv)))
715 SvREFCNT_dec(sv); /* it was a temp copy */
726 SV *rsv = newSViv(SvUTF8(sv));
730 RETVAL = &PL_sv_undef;
742 SV *rsv = newSViv(SvUTF8(sv));
746 RETVAL = &PL_sv_undef;
754 #if defined(USE_PERLIO) && !defined(USE_SFIO)
755 PerlIO_define_layer(aTHX_ &PerlIO_encode);
757 #include "8859_def.h"
758 #include "EBCDIC_def.h"
759 #include "Symbols_def.h"