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)
20 #if defined(USE_PERLIO) && !defined(USE_SFIO)
21 /* Define an encoding "layer" in the perliol.h sense.
22 The layer defined here "inherits" in an object-oriented sense from the
23 "perlio" layer with its PerlIOBuf_* "methods".
24 The implementation is particularly efficient as until Encode settles down
25 there is no point in tryint to tune it.
27 The layer works by overloading the "fill" and "flush" methods.
29 "fill" calls "SUPER::fill" in perl terms, then calls the encode OO perl API
30 to convert the encoded data to UTF-8 form, then copies it back to the
31 buffer. The "base class's" read methods then see the UTF-8 data.
33 "flush" transforms the UTF-8 data deposited by the "base class's write
34 method in the buffer back into the encoded form using the encode OO perl API,
35 then copies data back into the buffer and calls "SUPER::flush.
37 Note that "flush" is _also_ called for read mode - we still do the (back)-translate
38 so that the the base class's "flush" sees the correct number of encoded chars
39 for positioning the seek pointer. (This double translation is the worst performance
40 issue - particularly with all-perl encode engine.)
49 PerlIOBuf base; /* PerlIOBuf stuff */
55 PerlIOEncode_getarg(PerlIO *f)
58 PerlIOEncode *e = PerlIOSelf(f,PerlIOEncode);
59 SV *sv = &PL_sv_undef;
68 if (perl_call_method("name",G_SCALAR) == 1)
79 PerlIOEncode_pushed(PerlIO *f, const char *mode, SV *arg)
81 PerlIOEncode *e = PerlIOSelf(f,PerlIOEncode);
85 code = PerlIOBuf_pushed(f,mode,Nullsv);
91 if (perl_call_pv("Encode::find_encoding",G_SCALAR) != 1)
93 /* should never happen */
94 Perl_die(aTHX_ "Encode::find_encoding did not return a value");
104 Perl_warner(aTHX_ WARN_IO, "Cannot find encoding \"%"SVf"\"", arg);
107 SvREFCNT_inc(e->enc);
110 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
115 PerlIOEncode_popped(PerlIO *f)
117 PerlIOEncode *e = PerlIOSelf(f,PerlIOEncode);
121 SvREFCNT_dec(e->enc);
126 SvREFCNT_dec(e->bufsv);
133 PerlIOEncode_get_base(PerlIO *f)
135 PerlIOEncode *e = PerlIOSelf(f,PerlIOEncode);
138 e->base.bufsiz = 1024;
141 e->bufsv = newSV(e->base.bufsiz);
142 sv_setpvn(e->bufsv,"",0);
144 e->base.buf = (STDCHAR *)SvPVX(e->bufsv);
146 e->base.ptr = e->base.buf;
148 e->base.end = e->base.buf;
149 if (e->base.ptr < e->base.buf || e->base.ptr > e->base.buf+SvLEN(e->bufsv))
151 Perl_warn(aTHX_ " ptr %p(%p)%p",
152 e->base.buf,e->base.ptr,e->base.buf+SvLEN(e->bufsv));
155 if (SvLEN(e->bufsv) < e->base.bufsiz)
157 SSize_t poff = e->base.ptr - e->base.buf;
158 SSize_t eoff = e->base.end - e->base.buf;
159 e->base.buf = (STDCHAR *)SvGROW(e->bufsv,e->base.bufsiz);
160 e->base.ptr = e->base.buf + poff;
161 e->base.end = e->base.buf + eoff;
163 if (e->base.ptr < e->base.buf || e->base.ptr > e->base.buf+SvLEN(e->bufsv))
165 Perl_warn(aTHX_ " ptr %p(%p)%p",
166 e->base.buf,e->base.ptr,e->base.buf+SvLEN(e->bufsv));
173 PerlIOEncode_fill(PerlIO *f)
175 PerlIOEncode *e = PerlIOSelf(f,PerlIOEncode);
179 code = PerlIOBuf_fill(f);
185 /* Set SV that is the buffer to be buf..ptr */
186 SvCUR_set(e->bufsv, e->base.end - e->base.buf);
187 SvUTF8_off(e->bufsv);
195 if (perl_call_method("decode",G_SCALAR) != 1)
200 /* Now get translated string (forced to UTF-8) and copy back to buffer
201 don't use sv_setsv as that may "steal" PV from returned temp
202 and so free() our known-large-enough buffer.
203 sv_setpvn() should do but let us do it long hand.
205 s = SvPVutf8(uni,len);
206 if (s != SvPVX(e->bufsv))
208 e->base.buf = (STDCHAR *)SvGROW(e->bufsv,len);
209 Move(s,e->base.buf,len,char);
210 SvCUR_set(e->bufsv,len);
213 e->base.end = e->base.buf+len;
214 e->base.ptr = e->base.buf;
222 PerlIOEncode_flush(PerlIO *f)
224 PerlIOEncode *e = PerlIOSelf(f,PerlIOEncode);
226 if (e->bufsv && (PerlIOBase(f)->flags & (PERLIO_F_RDBUF|PERLIO_F_WRBUF))
227 &&(e->base.ptr > e->base.buf)
236 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
238 /* This is really just a flag to see if we took all the data, if
239 we did PerlIOBase_flush avoids a seek to lower layer.
240 Need to revisit if we start getting clever with unreads or seeks-in-buffer
242 left = e->base.end - e->base.ptr;
248 SvCUR_set(e->bufsv, e->base.ptr - e->base.buf);
253 if (perl_call_method("encode",G_SCALAR) != 1)
259 if (s != SvPVX(e->bufsv))
261 e->base.buf = (STDCHAR *)SvGROW(e->bufsv,len);
262 Move(s,e->base.buf,len,char);
263 SvCUR_set(e->bufsv,len);
265 SvUTF8_off(e->bufsv);
266 e->base.ptr = e->base.buf+len;
267 /* restore end != ptr as inequality is used by PerlIOBuf_flush in read case */
268 e->base.end = e->base.ptr + left;
271 if (PerlIOBuf_flush(f) != 0)
278 PerlIOEncode_close(PerlIO *f)
280 PerlIOEncode *e = PerlIOSelf(f,PerlIOEncode);
281 IV code = PerlIOBase_close(f);
285 SvREFCNT_dec(e->bufsv);
291 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF|PERLIO_F_WRBUF);
296 PerlIOEncode_tell(PerlIO *f)
299 PerlIOBuf *b = PerlIOSelf(f,PerlIOBuf);
300 /* Unfortunately the only way to get a postion is to back-translate,
301 the UTF8-bytes we have buf..ptr and adjust accordingly.
302 But we will try and save any unread data in case stream
305 if ((PerlIOBase(f)->flags & PERLIO_F_RDBUF) && b->ptr < b->end)
307 Size_t count = b->end - b->ptr;
308 PerlIO_push(aTHX_ f,&PerlIO_pending,"r",Nullsv);
309 /* Save what we have left to read */
310 PerlIOSelf(f,PerlIOBuf)->bufsiz = count;
311 PerlIO_unread(f,b->ptr,count);
312 /* There isn't any unread data - we just saved it - so avoid the lower seek */
314 /* Flush ourselves - now one layer down,
315 this does the back translate and adjusts position
317 PerlIO_flush(PerlIONext(f));
318 /* Set position of the saved data */
319 PerlIOSelf(f,PerlIOBuf)->posn = b->posn;
328 PerlIO_funcs PerlIO_encode = {
330 sizeof(PerlIOEncode),
348 PerlIOBase_setlinebuf,
349 PerlIOEncode_get_base,
353 PerlIOBuf_set_ptrcnt,
355 #endif /* encode layer */
358 Encode_Define(pTHX_ encode_t *enc)
361 HV *stash = gv_stashpv("Encode::XS", TRUE);
362 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(enc))),stash);
368 const char *name = enc->name[i++];
369 XPUSHs(sv_2mortal(newSVpvn(name,strlen(name))));
372 call_pv("Encode::define_encoding",G_DISCARD);
376 void call_failure (SV *routine, U8* done, U8* dest, U8* orig) {}
379 encode_method(pTHX_ encode_t *enc, encpage_t *dir, SV *src, int check)
382 U8 *s = (U8 *) SvPV(src,slen);
383 SV *dst = sv_2mortal(newSV(2*slen+1));
386 U8 *d = (U8 *) SvGROW(dst, 2*slen+1);
387 STRLEN dlen = SvLEN(dst);
389 while ((code = do_encode(dir,s,&slen,d,dlen,&dlen,!check)))
394 if (code == ENCODE_FALLBACK)
401 STRLEN need = (slen) ? (SvLEN(dst)*SvCUR(src)/slen) : (dlen + UTF8_MAXLEN);
402 if (need <= SvLEN(dst))
404 d = (U8 *) SvGROW(dst, need);
411 if (dir == enc->f_utf8)
413 if (!check && ckWARN_d(WARN_UTF8))
416 UV ch = utf8n_to_uvuni(s+slen,(SvCUR(src)-slen),&clen,0);
417 Perl_warner(aTHX_ WARN_UTF8, "\"\\N{U+%"UVxf"}\" does not map to %s", ch, enc->name[0]);
418 /* FIXME: Skip over the character, copy in replacement and continue
419 * but that is messy so for now just fail.
430 /* UTF-8 is supposed to be "Universal" so should not happen */
431 Perl_croak(aTHX_ "%s '%.*s' does not map to UTF-8",
432 enc->name[0], (int)(SvCUR(src)-slen),s+slen);
437 if (!check && ckWARN_d(WARN_UTF8))
439 Perl_warner(aTHX_ WARN_UTF8, "Partial %s character",
440 (dir == enc->f_utf8) ? "UTF-8" : enc->name[0]);
445 Perl_croak(aTHX_ "Unexpected code %d converting %s %s",
446 code, (dir == enc->f_utf8) ? "to" : "from",enc->name[0]);
454 if (slen < SvCUR(src))
456 Move(s+slen,s,SvCUR(src)-slen,U8);
458 SvCUR_set(src,SvCUR(src)-slen);
469 MODULE = Encode PACKAGE = Encode::XS PREFIX = Method_
474 Method_decode(obj,src,check = FALSE)
480 encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
481 ST(0) = encode_method(aTHX_ enc, enc->t_utf8, src, check);
487 Method_encode(obj,src,check = FALSE)
493 encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
494 sv_utf8_upgrade(src);
495 ST(0) = encode_method(aTHX_ enc, enc->f_utf8, src, check);
499 MODULE = Encode PACKAGE = Encode
504 _bytes_to_utf8(sv, ...)
508 SV * encoding = items == 2 ? ST(1) : Nullsv;
511 RETVAL = _encoded_bytes_to_utf8(sv, SvPV_nolen(encoding));
514 U8* s = (U8*)SvPV(sv, len);
517 converted = bytes_to_utf8(s, &len); /* This allocs */
518 sv_setpvn(sv, (char *)converted, len);
519 SvUTF8_on(sv); /* XXX Should we? */
520 Safefree(converted); /* ... so free it */
528 _utf8_to_bytes(sv, ...)
532 SV * to = items > 1 ? ST(1) : Nullsv;
533 SV * check = items > 2 ? ST(2) : Nullsv;
536 RETVAL = _encoded_utf8_to_bytes(sv, SvPV_nolen(to));
539 U8 *s = (U8*)SvPV(sv, len);
543 /* Must do things the slow way */
545 U8 *src = (U8*)savepv((char *)s); /* We need a copy to pass to check() */
548 New(83, dest, len, U8); /* I think */
557 /* Have to do it all ourselves because of error routine,
561 if (!(uv & 0x20)) { ulen = 2; uv &= 0x1f; }
562 else if (!(uv & 0x10)) { ulen = 3; uv &= 0x0f; }
563 else if (!(uv & 0x08)) { ulen = 4; uv &= 0x07; }
564 else if (!(uv & 0x04)) { ulen = 5; uv &= 0x03; }
565 else if (!(uv & 0x02)) { ulen = 6; uv &= 0x01; }
566 else if (!(uv & 0x01)) { ulen = 7; uv = 0; }
567 else { ulen = 13; uv = 0; }
569 /* Note change to utf8.c variable naming, for variety */
571 if ((*s & 0xc0) != 0x80)
575 uv = (uv << 6) | (*s++ & 0x3f);
579 call_failure(check, s, dest, src);
580 /* Now what happens? */
586 RETVAL = (utf8_to_bytes(s, &len) ? len : 0);
593 is_utf8(sv, check = FALSE)
599 RETVAL = SvUTF8(sv) ? TRUE : FALSE;
602 !is_utf8_string((U8*)SvPVX(sv), SvCUR(sv)))
617 SV *rsv = newSViv(SvUTF8(sv));
621 RETVAL = &PL_sv_undef;
633 SV *rsv = newSViv(SvUTF8(sv));
637 RETVAL = &PL_sv_undef;
645 #if defined(USE_PERLIO) && !defined(USE_SFIO)
646 PerlIO_define_layer(aTHX_ &PerlIO_encode);
648 #include "iso8859.def"
649 #include "EBCDIC.def"
650 #include "Symbols.def"