1 #define PERL_NO_GET_CONTEXT
11 struct _PerlIO base; /* Base "class" info */
41 #define MYMethod(x) #x,&s->x
44 PerlIOVia_fetchmethod(pTHX_ PerlIOVia * s, const char *method, CV ** save)
46 GV *gv = gv_fetchmeth(s->stash, method, strlen(method), 0);
48 Perl_warn(aTHX_ "Lookup %s::%s => %p", HvNAME_get(s->stash), method, gv);
51 return *save = GvCV(gv);
54 return *save = (CV *) - 1;
59 * Try and call method, possibly via cached lookup.
60 * If method does not exist return Nullsv (caller may fallback to another approach
61 * If method does exist call it with flags passing variable number of args
62 * Last arg is a "filehandle" to layer below (if present)
63 * Returns scalar returned by method (if any) otherwise sv_undef
67 PerlIOVia_method(pTHX_ PerlIO * f, const char *method, CV ** save, int flags,
70 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
72 (*save) ? *save : PerlIOVia_fetchmethod(aTHX_ s, method, save);
76 if (cv != (CV *) - 1) {
80 PUSHSTACKi(PERLSI_MAGIC);
85 while ((arg = va_arg(ap, SV *))) {
90 GV *gv = newGVgen(HvNAME_get(s->stash));
92 s->fh = newRV((SV *) gv);
95 /* shamelessly stolen from IO::File's new_tmpfile() */
96 hv_delete(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), G_DISCARD);
99 IoIFP(s->io) = PerlIONext(f);
100 IoOFP(s->io) = PerlIONext(f);
104 PerlIO_debug("No next\n");
105 /* FIXME: How should this work for OPEN etc? */
108 count = call_sv((SV *) cv, flags);
115 result = &PL_sv_undef;
125 PerlIOVia_pushed(pTHX_ PerlIO * f, const char *mode, SV * arg,
128 IV code = PerlIOBase_pushed(aTHX_ f, mode, Nullsv, tab);
130 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
132 if (ckWARN(WARN_LAYER))
133 Perl_warner(aTHX_ packWARN(WARN_LAYER),
134 "No package specified");
140 const char *pkg = SvPV(arg, pkglen);
142 newSVpvn(Perl_form(aTHX_ "PerlIO::via::%s", pkg),
144 s->stash = gv_stashpvn(SvPVX_const(s->obj), pkglen + 13, 0);
146 SvREFCNT_dec(s->obj);
147 s->obj = SvREFCNT_inc(arg);
148 s->stash = gv_stashpvn(pkg, pkglen, 0);
155 /* binmode() passes NULL - so find out what mode is */
156 mode = PerlIO_modestr(f,lmode);
158 modesv = sv_2mortal(newSVpvn(mode, strlen(mode)));
159 result = PerlIOVia_method(aTHX_ f, MYMethod(PUSHED), G_SCALAR,
162 if (sv_isobject(result)) {
163 SvREFCNT_dec(s->obj);
164 s->obj = SvREFCNT_inc(result);
166 else if (SvIV(result) != 0)
172 modesv = (*PerlIONext(f) && (PerlIOBase(PerlIONext(f))->flags & PERLIO_F_UTF8))
173 ? &PL_sv_yes : &PL_sv_no;
174 result = PerlIOVia_method(aTHX_ f, MYMethod(UTF8), G_SCALAR, modesv, Nullsv);
175 if (result && SvTRUE(result)) {
176 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
179 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
181 if (PerlIOVia_fetchmethod(aTHX_ s, MYMethod(FILL)) ==
183 PerlIOBase(f)->flags &= ~PERLIO_F_FASTGETS;
185 PerlIOBase(f)->flags |= PERLIO_F_FASTGETS;
188 if (ckWARN(WARN_LAYER))
189 Perl_warner(aTHX_ packWARN(WARN_LAYER),
190 "Cannot find package '%.*s'", (int) pkglen,
208 PerlIOVia_open(pTHX_ PerlIO_funcs * self, PerlIO_list_t * layers,
209 IV n, const char *mode, int fd, int imode, int perm,
210 PerlIO * f, int narg, SV ** args)
213 f = PerlIO_push(aTHX_ PerlIO_allocate(aTHX), self, mode,
218 if (!PerlIO_push(aTHX_ f, self, mode, PerlIOArg))
222 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
225 SV *fdsv = sv_2mortal(newSViv(fd));
227 PerlIOVia_method(aTHX_ f, MYMethod(FDOPEN), G_SCALAR, fdsv,
232 SV *imodesv = sv_2mortal(newSViv(imode));
233 SV *permsv = sv_2mortal(newSViv(perm));
235 PerlIOVia_method(aTHX_ f, MYMethod(SYSOPEN), G_SCALAR,
236 *args, imodesv, permsv, Nullsv);
240 PerlIOVia_method(aTHX_ f, MYMethod(OPEN), G_SCALAR,
245 if (sv_isobject(result))
246 s->obj = SvREFCNT_inc(result);
247 else if (!SvTRUE(result)) {
252 /* Required open method not present */
253 PerlIO_funcs *tab = NULL;
257 PerlIO_layer_fetch(aTHX_ layers, m, NULL);
265 if ((*tab->Open) (aTHX_ tab, layers, m, mode, fd, imode,
266 perm, PerlIONext(f), narg, args)) {
267 PerlIO_debug("Opened with %s => %p->%p\n", tab->name,
268 PerlIONext(f), *PerlIONext(f));
271 * More layers above the one that we used to open -
274 if (PerlIO_apply_layera
275 (aTHX_ PerlIONext(f), mode, layers, m + 1,
277 /* If pushing layers fails close the file */
282 /* FIXME - Call an OPENED method here ? */
286 PerlIO_debug("Open fail %s => %p->%p\n", tab->name,
287 PerlIONext(f), *PerlIONext(f));
288 /* Sub-layer open failed */
292 PerlIO_debug("Nothing to open with");
293 /* Nothing to do the open */
303 PerlIOVia_popped(pTHX_ PerlIO * f)
305 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
306 PerlIOVia_method(aTHX_ f, MYMethod(POPPED), G_VOID, Nullsv);
308 SvREFCNT_dec(s->var);
322 SvREFCNT_dec(s->obj);
329 PerlIOVia_close(pTHX_ PerlIO * f)
331 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
332 IV code = PerlIOBase_close(aTHX_ f);
334 PerlIOVia_method(aTHX_ f, MYMethod(CLOSE), G_SCALAR, Nullsv);
335 if (result && SvIV(result) != 0)
337 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
342 PerlIOVia_fileno(pTHX_ PerlIO * f)
344 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
346 PerlIOVia_method(aTHX_ f, MYMethod(FILENO), G_SCALAR, Nullsv);
347 return (result) ? SvIV(result) : PerlIO_fileno(PerlIONext(f));
351 PerlIOVia_binmode(pTHX_ PerlIO * f)
353 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
355 PerlIOVia_method(aTHX_ f, MYMethod(BINMODE), G_SCALAR, Nullsv);
356 if (!result || !SvOK(result)) {
364 PerlIOVia_seek(pTHX_ PerlIO * f, Off_t offset, int whence)
366 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
367 SV *offsv = sv_2mortal(sizeof(Off_t) > sizeof(IV)
368 ? newSVnv((NV)offset) : newSViv((IV)offset));
369 SV *whsv = sv_2mortal(newSViv(whence));
371 PerlIOVia_method(aTHX_ f, MYMethod(SEEK), G_SCALAR, offsv, whsv,
373 #if Off_t_size == 8 && defined(CONDOP_SIZE) && CONDOP_SIZE < Off_t_size
375 return (Off_t) SvIV(result);
379 return (result) ? SvIV(result) : -1;
384 PerlIOVia_tell(pTHX_ PerlIO * f)
386 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
388 PerlIOVia_method(aTHX_ f, MYMethod(TELL), G_SCALAR, Nullsv);
390 ? (SvNOK(result) ? (Off_t)SvNV(result) : (Off_t)SvIV(result))
395 PerlIOVia_unread(pTHX_ PerlIO * f, const void *vbuf, Size_t count)
397 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
398 SV *buf = sv_2mortal(newSVpvn((char *) vbuf, count));
400 PerlIOVia_method(aTHX_ f, MYMethod(UNREAD), G_SCALAR, buf, Nullsv);
402 return (SSize_t) SvIV(result);
404 return PerlIOBase_unread(aTHX_ f, vbuf, count);
409 PerlIOVia_read(pTHX_ PerlIO * f, void *vbuf, Size_t count)
412 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
413 if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS) {
414 rd = PerlIOBase_read(aTHX_ f, vbuf, count);
417 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
418 SV *buf = sv_2mortal(newSV(count));
419 SV *n = sv_2mortal(newSViv(count));
421 PerlIOVia_method(aTHX_ f, MYMethod(READ), G_SCALAR, buf, n,
424 rd = (SSize_t) SvIV(result);
425 Move(SvPVX(buf), vbuf, rd, char);
434 PerlIOVia_write(pTHX_ PerlIO * f, const void *vbuf, Size_t count)
436 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
437 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
438 SV *buf = newSVpvn((char *) vbuf, count);
440 PerlIOVia_method(aTHX_ f, MYMethod(WRITE), G_SCALAR, buf,
444 return (SSize_t) SvIV(result);
451 PerlIOVia_fill(pTHX_ PerlIO * f)
453 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
454 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
456 PerlIOVia_method(aTHX_ f, MYMethod(FILL), G_SCALAR, Nullsv);
458 SvREFCNT_dec(s->var);
461 if (result && SvOK(result)) {
463 const char *p = SvPV(result, len);
464 s->var = newSVpvn(p, len);
465 s->cnt = SvCUR(s->var);
469 PerlIOBase(f)->flags |= PERLIO_F_EOF;
475 PerlIOVia_flush(pTHX_ PerlIO * f)
477 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
479 PerlIOVia_method(aTHX_ f, MYMethod(FLUSH), G_SCALAR, Nullsv);
480 if (s->var && s->cnt > 0) {
481 SvREFCNT_dec(s->var);
484 return (result) ? SvIV(result) : 0;
488 PerlIOVia_get_base(pTHX_ PerlIO * f)
490 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
491 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
493 return (STDCHAR *) SvPVX(s->var);
496 return (STDCHAR *) NULL;
500 PerlIOVia_get_ptr(pTHX_ PerlIO * f)
502 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
503 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
505 STDCHAR *p = (STDCHAR *) (SvEND(s->var) - s->cnt);
509 return (STDCHAR *) NULL;
513 PerlIOVia_get_cnt(pTHX_ PerlIO * f)
515 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
516 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
525 PerlIOVia_bufsiz(pTHX_ PerlIO * f)
527 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
528 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
530 return SvCUR(s->var);
536 PerlIOVia_set_ptrcnt(pTHX_ PerlIO * f, STDCHAR * ptr, SSize_t cnt)
538 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
543 PerlIOVia_setlinebuf(pTHX_ PerlIO * f)
545 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
546 PerlIOVia_method(aTHX_ f, MYMethod(SETLINEBUF), G_VOID, Nullsv);
547 PerlIOBase_setlinebuf(aTHX_ f);
551 PerlIOVia_clearerr(pTHX_ PerlIO * f)
553 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
554 PerlIOVia_method(aTHX_ f, MYMethod(CLEARERR), G_VOID, Nullsv);
555 PerlIOBase_clearerr(aTHX_ f);
559 PerlIOVia_error(pTHX_ PerlIO * f)
561 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
563 PerlIOVia_method(aTHX_ f, "ERROR", &s->mERROR, G_SCALAR, Nullsv);
564 return (result) ? SvIV(result) : PerlIOBase_error(aTHX_ f);
568 PerlIOVia_eof(pTHX_ PerlIO * f)
570 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
572 PerlIOVia_method(aTHX_ f, "EOF", &s->mEOF, G_SCALAR, Nullsv);
573 return (result) ? SvIV(result) : PerlIOBase_eof(aTHX_ f);
577 PerlIOVia_getarg(pTHX_ PerlIO * f, CLONE_PARAMS * param, int flags)
579 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
580 return PerlIOVia_method(aTHX_ f, MYMethod(GETARG), G_SCALAR, Nullsv);
584 PerlIOVia_dup(pTHX_ PerlIO * f, PerlIO * o, CLONE_PARAMS * param,
587 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
588 /* Most of the fields will lazily set themselves up as needed
589 stash and obj have been set up by the implied push
597 PERLIO_FUNCS_DECL(PerlIO_object) = {
598 sizeof(PerlIO_funcs),
601 PERLIO_K_BUFFERED|PERLIO_K_DESTRUCT,
604 PerlIOVia_open, /* NULL, */
605 PerlIOVia_binmode, /* NULL, */
620 PerlIOVia_setlinebuf,
625 PerlIOVia_set_ptrcnt,
629 #endif /* Layers available */
631 MODULE = PerlIO::via PACKAGE = PerlIO::via
637 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_object));