1 #define PERL_NO_GET_CONTEXT
11 struct _PerlIO base; /* Base "class" info */
40 #define MYMethod(x) #x,&s->x
43 PerlIOVia_fetchmethod(pTHX_ PerlIOVia *s,char *method,CV **save)
45 GV *gv = gv_fetchmeth(s->stash,method,strlen(method),0);
47 Perl_warn(aTHX_ "Lookup %s::%s => %p",HvNAME(s->stash),method,gv);
51 return *save = GvCV(gv);
55 return *save = (CV *) -1;
60 * Try and call method, possibly via cached lookup.
61 * If method does not exist return Nullsv (caller may fallback to another approach
62 * If method does exist call it with flags passing variable number of args
63 * Last arg is a "filehandle" to layer below (if present)
64 * Returns scalar returned by method (if any) otherwise sv_undef
68 PerlIOVia_method(pTHX_ PerlIO *f,char *method,CV **save,int flags,...)
70 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
71 CV *cv = (*save) ? *save : PerlIOVia_fetchmethod(aTHX_ s,method,save);
80 PUSHSTACKi(PERLSI_MAGIC);
85 while ((arg = va_arg(ap,SV *)))
93 GV *gv = newGVgen(HvNAME(s->stash));
95 s->fh = newRV_noinc((SV *)gv);
98 IoIFP(s->io) = PerlIONext(f);
99 IoOFP(s->io) = PerlIONext(f);
104 PerlIO_debug("No next\n");
107 count = call_sv((SV *)cv,flags);
116 result = &PL_sv_undef;
126 PerlIOVia_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
128 IV code = PerlIOBase_pushed(aTHX_ f,mode,Nullsv);
131 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
134 if (ckWARN(WARN_LAYER))
135 Perl_warner(aTHX_ packWARN(WARN_LAYER), "No package specified");
142 char *pkg = SvPV(arg,pkglen);
143 s->obj = SvREFCNT_inc(arg);
144 s->stash = gv_stashpvn(pkg, pkglen, FALSE);
147 SV *modesv = (mode) ? sv_2mortal(newSVpvn(mode,strlen(mode))) : Nullsv;
148 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(PUSHED),G_SCALAR,modesv,Nullsv);
151 if (sv_isobject(result))
153 s->obj = SvREFCNT_inc(result);
156 else if (SvIV(result) != 0)
159 if (PerlIOVia_fetchmethod(aTHX_ s,MYMethod(FILL)) == (CV *) -1)
160 PerlIOBase(f)->flags &= ~PERLIO_F_FASTGETS;
162 PerlIOBase(f)->flags |= PERLIO_F_FASTGETS;
166 if (ckWARN(WARN_LAYER))
167 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Cannot find package '%.*s'",(int) pkglen,pkg);
183 PerlIOVia_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers, IV n,
184 const char *mode, int fd, int imode, int perm,
185 PerlIO *f, int narg, SV **args)
189 f = PerlIO_push(aTHX_ PerlIO_allocate(aTHX),self,mode,PerlIOArg);
194 if (!PerlIO_push(aTHX_ f,self,mode,PerlIOArg))
199 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
203 SV *fdsv = sv_2mortal(newSViv(fd));
204 result = PerlIOVia_method(aTHX_ f,MYMethod(FDOPEN),G_SCALAR,fdsv,Nullsv);
210 SV *imodesv = sv_2mortal(newSViv(imode));
211 SV *permsv = sv_2mortal(newSViv(perm));
212 result = PerlIOVia_method(aTHX_ f,MYMethod(SYSOPEN),G_SCALAR,*args,imodesv,permsv,Nullsv);
216 result = PerlIOVia_method(aTHX_ f,MYMethod(OPEN),G_SCALAR,*args,Nullsv);
221 if (sv_isobject(result))
222 s->obj = SvREFCNT_inc(result);
223 else if (!SvTRUE(result))
230 /* Required open method not present */
231 PerlIO_funcs *tab = NULL;
234 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layers, m, NULL);
242 if ((*tab->Open) (aTHX_ tab, layers, m, mode, fd, imode, perm,
243 PerlIONext(f), narg, args)) {
244 PerlIO_debug("Opened with %s => %p->%p\n",tab->name,PerlIONext(f),*PerlIONext(f));
247 * More layers above the one that we used to open -
250 if (PerlIO_apply_layera(aTHX_ PerlIONext(f), mode, layers, m+1, n) != 0) {
251 /* If pushing layers fails close the file */
259 /* Sub-layer open failed */
263 /* Nothing to do the open */
272 PerlIOVia_popped(pTHX_ PerlIO *f)
274 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
275 PerlIOVia_method(aTHX_ f,MYMethod(POPPED),G_VOID,Nullsv);
278 SvREFCNT_dec(s->var);
295 SvREFCNT_dec(s->obj);
302 PerlIOVia_close(pTHX_ PerlIO *f)
304 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
305 IV code = PerlIOBase_close(aTHX_ f);
306 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(CLOSE),G_SCALAR,Nullsv);
307 if (result && SvIV(result) != 0)
309 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF|PERLIO_F_WRBUF);
314 PerlIOVia_fileno(pTHX_ PerlIO *f)
316 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
317 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILENO),G_SCALAR,Nullsv);
318 return (result) ? SvIV(result) : PerlIO_fileno(PerlIONext(f));
322 PerlIOVia_binmode(pTHX_ PerlIO *f)
324 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
325 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(BINMODE),G_SCALAR,Nullsv);
326 if (!result || !SvOK(result))
335 PerlIOVia_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
337 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
338 SV *offsv = sv_2mortal(newSViv(offset));
339 SV *whsv = sv_2mortal(newSViv(whence));
340 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(SEEK),G_SCALAR,offsv,whsv,Nullsv);
341 return (result) ? SvIV(result) : -1;
345 PerlIOVia_tell(pTHX_ PerlIO *f)
347 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
348 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(TELL),G_SCALAR,Nullsv);
349 return (result) ? (Off_t) SvIV(result) : (Off_t) -1;
353 PerlIOVia_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
355 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
356 SV *buf = sv_2mortal(newSVpvn((char *)vbuf,count));
357 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(UNREAD),G_SCALAR,buf,Nullsv);
359 return (SSize_t) SvIV(result);
362 return PerlIOBase_unread(aTHX_ f,vbuf,count);
367 PerlIOVia_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
370 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
372 if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)
374 rd = PerlIOBase_read(aTHX_ f,vbuf,count);
378 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
379 SV *buf = sv_2mortal(newSV(count));
380 SV *n = sv_2mortal(newSViv(count));
381 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(READ),G_SCALAR,buf,n,Nullsv);
384 rd = (SSize_t) SvIV(result);
385 Move(SvPVX(buf),vbuf,rd,char);
394 PerlIOVia_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
396 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE)
398 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
399 SV *buf = newSVpvn((char *)vbuf,count);
400 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(WRITE),G_SCALAR,buf,Nullsv);
403 return (SSize_t) SvIV(result);
410 PerlIOVia_fill(pTHX_ PerlIO *f)
412 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
414 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
415 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILL),G_SCALAR,Nullsv);
418 SvREFCNT_dec(s->var);
421 if (result && SvOK(result))
424 char *p = SvPV(result,len);
425 s->var = newSVpvn(p,len);
426 s->cnt = SvCUR(s->var);
430 PerlIOBase(f)->flags |= PERLIO_F_EOF;
436 PerlIOVia_flush(pTHX_ PerlIO *f)
438 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
439 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FLUSH),G_SCALAR,Nullsv);
440 if (s->var && s->cnt > 0)
442 SvREFCNT_dec(s->var);
445 return (result) ? SvIV(result) : 0;
449 PerlIOVia_get_base(pTHX_ PerlIO *f)
451 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
453 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
456 return (STDCHAR *)SvPVX(s->var);
459 return (STDCHAR *) Nullch;
463 PerlIOVia_get_ptr(pTHX_ PerlIO *f)
465 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
467 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
470 STDCHAR *p = (STDCHAR *)(SvEND(s->var) - s->cnt);
474 return (STDCHAR *) Nullch;
478 PerlIOVia_get_cnt(pTHX_ PerlIO *f)
480 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
482 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
492 PerlIOVia_bufsiz(pTHX_ PerlIO *f)
494 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
496 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
498 return SvCUR(s->var);
504 PerlIOVia_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR *ptr, SSize_t cnt)
506 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
511 PerlIOVia_setlinebuf(pTHX_ PerlIO *f)
513 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
514 PerlIOVia_method(aTHX_ f,MYMethod(SETLINEBUF),G_VOID,Nullsv);
515 PerlIOBase_setlinebuf(aTHX_ f);
519 PerlIOVia_clearerr(pTHX_ PerlIO *f)
521 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
522 PerlIOVia_method(aTHX_ f,MYMethod(CLEARERR),G_VOID,Nullsv);
523 PerlIOBase_clearerr(aTHX_ f);
527 PerlIOVia_error(pTHX_ PerlIO *f)
529 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
530 SV *result = PerlIOVia_method(aTHX_ f,"ERROR",&s->mERROR,G_SCALAR,Nullsv);
531 return (result) ? SvIV(result) : PerlIOBase_error(aTHX_ f);
535 PerlIOVia_eof(pTHX_ PerlIO *f)
537 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
538 SV *result = PerlIOVia_method(aTHX_ f,"EOF",&s->mEOF,G_SCALAR,Nullsv);
539 return (result) ? SvIV(result) : PerlIOBase_eof(aTHX_ f);
543 PerlIOVia_getarg(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
545 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
546 return PerlIOVia_method(aTHX_ f,MYMethod(GETARG),G_SCALAR,Nullsv);
550 PerlIOVia_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
552 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags)))
554 /* Most of the fields will lazily set themselves up as needed
555 stash and obj have been set up by the implied push
561 PerlIO_funcs PerlIO_object = {
564 PERLIO_K_BUFFERED|PERLIO_K_DESTRUCT,
567 PerlIOVia_open, /* NULL, */
568 PerlIOVia_binmode, /* NULL, */
583 PerlIOVia_setlinebuf,
588 PerlIOVia_set_ptrcnt,
592 #endif /* Layers available */
594 MODULE = PerlIO::Via PACKAGE = PerlIO::Via
600 PerlIO_define_layer(aTHX_ &PerlIO_object);