#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
+#define U8 U8
+#include "encode.h"
+#include "iso8859.h"
+#include "EBCDIC.h"
+#include "Symbols.h"
#define UNIMPLEMENTED(x,y) y x (SV *sv, char *encoding) { \
Perl_croak(aTHX_ "panic_unimplemented"); \
UNIMPLEMENTED(_encoded_utf8_to_bytes, I32)
UNIMPLEMENTED(_encoded_bytes_to_utf8, I32)
+#ifdef USE_PERLIO
+/* Define an encoding "layer" in the perliol.h sense.
+ The layer defined here "inherits" in an object-oriented sense from the
+ "perlio" layer with its PerlIOBuf_* "methods".
+ The implementation is particularly efficient as until Encode settles down
+ there is no point in tryint to tune it.
+
+ The layer works by overloading the "fill" and "flush" methods.
+
+ "fill" calls "SUPER::fill" in perl terms, then calls the encode OO perl API
+ to convert the encoded data to UTF-8 form, then copies it back to the
+ buffer. The "base class's" read methods then see the UTF-8 data.
+
+ "flush" transforms the UTF-8 data deposited by the "base class's write
+ method in the buffer back into the encoded form using the encode OO perl API,
+ then copies data back into the buffer and calls "SUPER::flush.
+
+ Note that "flush" is _also_ called for read mode - we still do the (back)-translate
+ so that the the base class's "flush" sees the correct number of encoded chars
+ for positioning the seek pointer. (This double translation is the worst performance
+ issue - particularly with all-perl encode engine.)
+
+*/
+
+
+#include "perliol.h"
+
+typedef struct
+{
+ PerlIOBuf base; /* PerlIOBuf stuff */
+ SV * bufsv;
+ SV * enc;
+} PerlIOEncode;
+
+
+IV
+PerlIOEncode_pushed(PerlIO *f, const char *mode,const char *arg,STRLEN len)
+{
+ PerlIOEncode *e = PerlIOSelf(f,PerlIOEncode);
+ dTHX;
+ dSP;
+ IV code;
+ code = PerlIOBuf_pushed(f,mode,Nullch,0);
+ ENTER;
+ SAVETMPS;
+ PUSHMARK(sp);
+ XPUSHs(sv_2mortal(newSVpv("Encode",0)));
+ XPUSHs(sv_2mortal(newSVpvn(arg,len)));
+ PUTBACK;
+ if (perl_call_method("getEncoding",G_SCALAR) != 1)
+ return -1;
+ SPAGAIN;
+ e->enc = POPs;
+ PUTBACK;
+ if (!SvROK(e->enc))
+ return -1;
+ SvREFCNT_inc(e->enc);
+ FREETMPS;
+ LEAVE;
+ PerlIOBase(f)->flags |= PERLIO_F_UTF8;
+ return code;
+}
+
+IV
+PerlIOEncode_popped(PerlIO *f)
+{
+ PerlIOEncode *e = PerlIOSelf(f,PerlIOEncode);
+ dTHX;
+ if (e->enc)
+ {
+ SvREFCNT_dec(e->enc);
+ e->enc = Nullsv;
+ }
+ if (e->bufsv)
+ {
+ SvREFCNT_dec(e->bufsv);
+ e->bufsv = Nullsv;
+ }
+ return 0;
+}
+
+STDCHAR *
+PerlIOEncode_get_base(PerlIO *f)
+{
+ PerlIOEncode *e = PerlIOSelf(f,PerlIOEncode);
+ dTHX;
+ if (!e->base.bufsiz)
+ e->base.bufsiz = 1024;
+ if (!e->bufsv)
+ {
+ e->bufsv = newSV(e->base.bufsiz);
+ sv_setpvn(e->bufsv,"",0);
+ }
+ e->base.buf = (STDCHAR *)SvPVX(e->bufsv);
+ if (!e->base.ptr)
+ e->base.ptr = e->base.buf;
+ if (!e->base.end)
+ e->base.end = e->base.buf;
+ if (e->base.ptr < e->base.buf || e->base.ptr > e->base.buf+SvLEN(e->bufsv))
+ {
+ Perl_warn(aTHX_ " ptr %p(%p)%p",
+ e->base.buf,e->base.ptr,e->base.buf+SvLEN(e->bufsv));
+ abort();
+ }
+ if (SvLEN(e->bufsv) < e->base.bufsiz)
+ {
+ SSize_t poff = e->base.ptr - e->base.buf;
+ SSize_t eoff = e->base.end - e->base.buf;
+ e->base.buf = (STDCHAR *)SvGROW(e->bufsv,e->base.bufsiz);
+ e->base.ptr = e->base.buf + poff;
+ e->base.end = e->base.buf + eoff;
+ }
+ if (e->base.ptr < e->base.buf || e->base.ptr > e->base.buf+SvLEN(e->bufsv))
+ {
+ Perl_warn(aTHX_ " ptr %p(%p)%p",
+ e->base.buf,e->base.ptr,e->base.buf+SvLEN(e->bufsv));
+ abort();
+ }
+ return e->base.buf;
+}
+
+IV
+PerlIOEncode_fill(PerlIO *f)
+{
+ PerlIOEncode *e = PerlIOSelf(f,PerlIOEncode);
+ dTHX;
+ dSP;
+ IV code;
+ code = PerlIOBuf_fill(f);
+ if (code == 0)
+ {
+ SV *uni;
+ STRLEN len;
+ char *s;
+ /* Set SV that is the buffer to be buf..ptr */
+ SvCUR_set(e->bufsv, e->base.end - e->base.buf);
+ SvUTF8_off(e->bufsv);
+ ENTER;
+ SAVETMPS;
+ PUSHMARK(sp);
+ XPUSHs(e->enc);
+ XPUSHs(e->bufsv);
+ XPUSHs(&PL_sv_yes);
+ PUTBACK;
+ if (perl_call_method("toUnicode",G_SCALAR) != 1)
+ code = -1;
+ SPAGAIN;
+ uni = POPs;
+ PUTBACK;
+ /* Now get translated string (forced to UTF-8) and copy back to buffer
+ don't use sv_setsv as that may "steal" PV from returned temp
+ and so free() our known-large-enough buffer.
+ sv_setpvn() should do but let us do it long hand.
+ */
+ s = SvPVutf8(uni,len);
+ if (s != SvPVX(e->bufsv))
+ {
+ e->base.buf = (STDCHAR *)SvGROW(e->bufsv,len);
+ Move(s,e->base.buf,len,char);
+ SvCUR_set(e->bufsv,len);
+ }
+ SvUTF8_on(e->bufsv);
+ e->base.end = e->base.buf+len;
+ e->base.ptr = e->base.buf;
+ FREETMPS;
+ LEAVE;
+ }
+ return code;
+}
+
+IV
+PerlIOEncode_flush(PerlIO *f)
+{
+ PerlIOEncode *e = PerlIOSelf(f,PerlIOEncode);
+ IV code = 0;
+ dTHX;
+ if (e->bufsv && (PerlIOBase(f)->flags & (PERLIO_F_RDBUF|PERLIO_F_WRBUF)))
+ {
+ dSP;
+ SV *str;
+ char *s;
+ STRLEN len;
+ SSize_t left = 0;
+ if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
+ {
+ /* This is really just a flag to see if we took all the data, if
+ we did PerlIOBase_flush avoids a seek to lower layer.
+ Need to revisit if we start getting clever with unreads or seeks-in-buffer
+ */
+ left = e->base.end - e->base.ptr;
+ }
+ ENTER;
+ SAVETMPS;
+ PUSHMARK(sp);
+ XPUSHs(e->enc);
+ SvCUR_set(e->bufsv, e->base.ptr - e->base.buf);
+ SvUTF8_on(e->bufsv);
+ XPUSHs(e->bufsv);
+ XPUSHs(&PL_sv_yes);
+ PUTBACK;
+ if (perl_call_method("fromUnicode",G_SCALAR) != 1)
+ code = -1;
+ SPAGAIN;
+ str = POPs;
+ PUTBACK;
+ s = SvPV(str,len);
+ if (s != SvPVX(e->bufsv))
+ {
+ e->base.buf = (STDCHAR *)SvGROW(e->bufsv,len);
+ Move(s,e->base.buf,len,char);
+ SvCUR_set(e->bufsv,len);
+ }
+ SvUTF8_off(e->bufsv);
+ e->base.ptr = e->base.buf+len;
+ /* restore end != ptr as inequality is used by PerlIOBuf_flush in read case */
+ e->base.end = e->base.ptr + left;
+ FREETMPS;
+ LEAVE;
+ if (PerlIOBuf_flush(f) != 0)
+ code = -1;
+ }
+ return code;
+}
+
+IV
+PerlIOEncode_close(PerlIO *f)
+{
+ PerlIOEncode *e = PerlIOSelf(f,PerlIOEncode);
+ IV code = PerlIOBase_close(f);
+ dTHX;
+ if (e->bufsv)
+ {
+ SvREFCNT_dec(e->bufsv);
+ e->bufsv = Nullsv;
+ }
+ e->base.buf = NULL;
+ e->base.ptr = NULL;
+ e->base.end = NULL;
+ PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF|PERLIO_F_WRBUF);
+ return code;
+}
+
+Off_t
+PerlIOEncode_tell(PerlIO *f)
+{
+ PerlIOBuf *b = PerlIOSelf(f,PerlIOBuf);
+ /* Unfortunately the only way to get a postion is to back-translate,
+ the UTF8-bytes we have buf..ptr and adjust accordingly.
+ But we will try and save any unread data in case stream
+ is un-seekable.
+ */
+ if ((PerlIOBase(f)->flags & PERLIO_F_RDBUF) && b->ptr < b->end)
+ {
+ Size_t count = b->end - b->ptr;
+ PerlIO_push(f,&PerlIO_pending,"r",Nullch,0);
+ /* Save what we have left to read */
+ PerlIOSelf(f,PerlIOBuf)->bufsiz = count;
+ PerlIO_unread(f,b->ptr,count);
+ /* There isn't any unread data - we just saved it - so avoid the lower seek */
+ b->end = b->ptr;
+ /* Flush ourselves - now one layer down,
+ this does the back translate and adjusts position
+ */
+ PerlIO_flush(PerlIONext(f));
+ /* Set position of the saved data */
+ PerlIOSelf(f,PerlIOBuf)->posn = b->posn;
+ }
+ else
+ {
+ PerlIO_flush(f);
+ }
+ return b->posn;
+}
+
+PerlIO_funcs PerlIO_encode = {
+ "encoding",
+ sizeof(PerlIOEncode),
+ PERLIO_K_BUFFERED,
+ PerlIOBase_fileno,
+ PerlIOBuf_fdopen,
+ PerlIOBuf_open,
+ PerlIOBuf_reopen,
+ PerlIOEncode_pushed,
+ PerlIOEncode_popped,
+ PerlIOBuf_read,
+ PerlIOBuf_unread,
+ PerlIOBuf_write,
+ PerlIOBuf_seek,
+ PerlIOEncode_tell,
+ PerlIOEncode_close,
+ PerlIOEncode_flush,
+ PerlIOEncode_fill,
+ PerlIOBase_eof,
+ PerlIOBase_error,
+ PerlIOBase_clearerr,
+ PerlIOBuf_setlinebuf,
+ PerlIOEncode_get_base,
+ PerlIOBuf_bufsiz,
+ PerlIOBuf_get_ptr,
+ PerlIOBuf_get_cnt,
+ PerlIOBuf_set_ptrcnt,
+};
+#endif
+
+void
+Encode_Define(pTHX_ encode_t *enc)
+{
+ HV *hash = get_hv("Encode::encoding",GV_ADD|GV_ADDMULTI);
+ HV *stash = gv_stashpv("Encode::XS", TRUE);
+ SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(enc))),stash);
+ hv_store(hash,enc->name,strlen(enc->name),sv,0);
+}
+
void call_failure (SV *routine, U8* done, U8* dest, U8* orig) {}
+static SV *
+encode_method(pTHX_ encode_t *enc, encpage_t *dir, SV *src, int check)
+{
+ STRLEN slen;
+ U8 *s = (U8 *) SvPV(src,slen);
+ SV *dst = sv_2mortal(newSV(2*slen+1));
+ if (slen)
+ {
+ U8 *d = (U8 *) SvGROW(dst, 2*slen+1);
+ STRLEN dlen = SvLEN(dst);
+ int code;
+ while ((code = do_encode(dir,s,&slen,d,dlen,&dlen,!check)))
+ {
+ SvCUR_set(dst,dlen);
+ SvPOK_on(dst);
+
+ if (code == ENCODE_FALLBACK)
+ break;
+
+ switch(code)
+ {
+ case ENCODE_NOSPACE:
+ {
+ STRLEN need = (slen) ? (SvLEN(dst)*SvCUR(src)/slen) : (dlen + UTF8_MAXLEN);
+ if (need <= SvLEN(dst))
+ need += UTF8_MAXLEN;
+ d = (U8 *) SvGROW(dst, need);
+ dlen = SvLEN(dst);
+ slen = SvCUR(src);
+ break;
+ }
+
+ case ENCODE_NOREP:
+ if (dir == enc->f_utf8)
+ {
+ if (!check && ckWARN_d(WARN_UTF8))
+ {
+ STRLEN clen;
+ UV ch = utf8_to_uv(s+slen,(SvCUR(src)-slen),&clen,0);
+ Perl_warner(aTHX_ WARN_UTF8, "\"\\x{%x}\" does not map to %s", ch, enc->name);
+ /* FIXME: Skip over the character, copy in replacement and continue
+ * but that is messy so for now just fail.
+ */
+ return &PL_sv_undef;
+ }
+ else
+ {
+ return &PL_sv_undef;
+ }
+ }
+ else
+ {
+ /* UTF-8 is supposed to be "Universal" so should not happen */
+ Perl_croak(aTHX_ "%s '%.*s' does not map to UTF-8",
+ enc->name, (SvCUR(src)-slen),s+slen);
+ }
+ break;
+
+ case ENCODE_PARTIAL:
+ if (!check && ckWARN_d(WARN_UTF8))
+ {
+ Perl_warner(aTHX_ WARN_UTF8, "Partial %s character",
+ (dir == enc->f_utf8) ? "UTF-8" : enc->name);
+ }
+ return &PL_sv_undef;
+
+ default:
+ Perl_croak(aTHX_ "Unexpected code %d converting %s %s",
+ code, (dir == enc->f_utf8) ? "to" : "from",enc->name);
+ return &PL_sv_undef;
+ }
+ }
+ SvCUR_set(dst,dlen);
+ SvPOK_on(dst);
+ if (check)
+ {
+ if (slen < SvCUR(src))
+ {
+ Move(s+slen,s,SvCUR(src)-slen,U8);
+ }
+ SvCUR_set(src,SvCUR(src)-slen);
+ }
+ }
+ return dst;
+}
+
+MODULE = Encode PACKAGE = Encode PREFIX = sv_
+
+void
+valid_utf8(sv)
+SV * sv
+CODE:
+ {
+ STRLEN len;
+ char *s = SvPV(sv,len);
+ if (!SvUTF8(sv) || is_utf8_string((U8*)s,len))
+ XSRETURN_YES;
+ else
+ XSRETURN_NO;
+ }
+
+void
+sv_utf8_encode(sv)
+SV * sv
+
+bool
+sv_utf8_decode(sv)
+SV * sv
+
+void
+sv_utf8_upgrade(sv)
+SV * sv
+
+bool
+sv_utf8_downgrade(sv,failok=0)
+SV * sv
+bool failok
+
+MODULE = Encode PACKAGE = Encode::XS PREFIX = Encode_
+
+PROTOTYPES: ENABLE
+
+void
+Encode_toUnicode(obj,src,check = 0)
+SV * obj
+SV * src
+int check
+CODE:
+ {
+ encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
+ ST(0) = encode_method(aTHX_ enc, enc->t_utf8, src, check);
+ SvUTF8_on(ST(0));
+ XSRETURN(1);
+ }
+
+void
+Encode_fromUnicode(obj,src,check = 0)
+SV * obj
+SV * src
+int check
+CODE:
+ {
+ encode_t *enc = INT2PTR(encode_t *, SvIV(SvRV(obj)));
+ sv_utf8_upgrade(src);
+ ST(0) = encode_method(aTHX_ enc, enc->f_utf8, src, check);
+ XSRETURN(1);
+ }
+
MODULE = Encode PACKAGE = Encode
PROTOTYPES: ENABLE
{
SV * check = items == 2 ? ST(1) : Nullsv;
if (SvPOK(sv)) {
- RETVAL = SvUTF8(sv);
+ RETVAL = SvUTF8(sv) ? 1 : 0;
if (RETVAL &&
SvTRUE(check) &&
!is_utf8_string((U8*)SvPVX(sv), SvCUR(sv)))
OUTPUT:
RETVAL
+BOOT:
+{
+#ifdef USE_PERLIO
+ PerlIO_define_layer(&PerlIO_encode);
+#endif
+#include "iso8859.def"
+#include "EBCDIC.def"
+#include "Symbols.def"
+}
projects / p5sagit/p5-mst-13.2.git / blobdiff