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);
73 (*save) ? *save : PerlIOVia_fetchmethod(aTHX_ s, method, save);
74 if (cv != (CV *) - 1) {
81 PUSHSTACKi(PERLSI_MAGIC);
85 while ((arg = va_arg(ap, SV *))) {
92 char *package = HvNAME_get(s->stash);
95 return Nullsv; /* can this ever happen? */
96 gv = newGVgen(package);
98 s->fh = newRV((SV *) gv);
101 /* shamelessly stolen from IO::File's new_tmpfile() */
102 (void) hv_delete(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), G_DISCARD);
105 IoIFP(s->io) = PerlIONext(f);
106 IoOFP(s->io) = PerlIONext(f);
110 PerlIO_debug("No next\n");
111 /* FIXME: How should this work for OPEN etc? */
114 count = call_sv((SV *) cv, flags);
121 result = &PL_sv_undef;
130 PerlIOVia_pushed(pTHX_ PerlIO * f, const char *mode, SV * arg,
133 IV code = PerlIOBase_pushed(aTHX_ f, mode, Nullsv, tab);
135 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
137 if (ckWARN(WARN_LAYER))
138 Perl_warner(aTHX_ packWARN(WARN_LAYER),
139 "No package specified");
145 const char *pkg = SvPV(arg, pkglen);
147 newSVpvn(Perl_form(aTHX_ "PerlIO::via::%s", pkg),
149 s->stash = gv_stashpvn(SvPVX_const(s->obj), pkglen + 13, 0);
151 SvREFCNT_dec(s->obj);
152 s->obj = SvREFCNT_inc(arg);
153 s->stash = gv_stashpvn(pkg, pkglen, 0);
160 /* binmode() passes NULL - so find out what mode is */
161 mode = PerlIO_modestr(f,lmode);
163 modesv = newSVpvn_flags(mode, strlen(mode), SVs_TEMP);
164 result = PerlIOVia_method(aTHX_ f, MYMethod(PUSHED), G_SCALAR,
167 if (sv_isobject(result)) {
168 SvREFCNT_dec(s->obj);
169 s->obj = SvREFCNT_inc(result);
171 else if (SvIV(result) != 0)
177 modesv = (*PerlIONext(f) && (PerlIOBase(PerlIONext(f))->flags & PERLIO_F_UTF8))
178 ? &PL_sv_yes : &PL_sv_no;
179 result = PerlIOVia_method(aTHX_ f, MYMethod(UTF8), G_SCALAR, modesv, Nullsv);
180 if (result && SvTRUE(result)) {
181 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
184 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
186 if (PerlIOVia_fetchmethod(aTHX_ s, MYMethod(FILL)) ==
188 PerlIOBase(f)->flags &= ~PERLIO_F_FASTGETS;
190 PerlIOBase(f)->flags |= PERLIO_F_FASTGETS;
193 if (ckWARN(WARN_LAYER))
194 Perl_warner(aTHX_ packWARN(WARN_LAYER),
195 "Cannot find package '%.*s'", (int) pkglen,
213 PerlIOVia_open(pTHX_ PerlIO_funcs * self, PerlIO_list_t * layers,
214 IV n, const char *mode, int fd, int imode, int perm,
215 PerlIO * f, int narg, SV ** args)
218 f = PerlIO_push(aTHX_ PerlIO_allocate(aTHX), self, mode,
223 if (!PerlIO_push(aTHX_ f, self, mode, PerlIOArg))
227 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
230 SV *fdsv = sv_2mortal(newSViv(fd));
232 PerlIOVia_method(aTHX_ f, MYMethod(FDOPEN), G_SCALAR, fdsv,
237 SV *imodesv = sv_2mortal(newSViv(imode));
238 SV *permsv = sv_2mortal(newSViv(perm));
240 PerlIOVia_method(aTHX_ f, MYMethod(SYSOPEN), G_SCALAR,
241 *args, imodesv, permsv, Nullsv);
245 PerlIOVia_method(aTHX_ f, MYMethod(OPEN), G_SCALAR,
250 if (sv_isobject(result))
251 s->obj = SvREFCNT_inc(result);
252 else if (!SvTRUE(result)) {
257 /* Required open method not present */
258 PerlIO_funcs *tab = NULL;
262 PerlIO_layer_fetch(aTHX_ layers, m, NULL);
270 if ((*tab->Open) (aTHX_ tab, layers, m, mode, fd, imode,
271 perm, PerlIONext(f), narg, args)) {
272 PerlIO_debug("Opened with %s => %p->%p\n", tab->name,
273 PerlIONext(f), *PerlIONext(f));
276 * More layers above the one that we used to open -
279 if (PerlIO_apply_layera
280 (aTHX_ PerlIONext(f), mode, layers, m + 1,
282 /* If pushing layers fails close the file */
287 /* FIXME - Call an OPENED method here ? */
291 PerlIO_debug("Open fail %s => %p->%p\n", tab->name,
292 PerlIONext(f), *PerlIONext(f));
293 /* Sub-layer open failed */
297 PerlIO_debug("Nothing to open with");
298 /* Nothing to do the open */
308 PerlIOVia_popped(pTHX_ PerlIO * f)
310 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
311 PerlIOVia_method(aTHX_ f, MYMethod(POPPED), G_VOID, Nullsv);
313 SvREFCNT_dec(s->var);
327 SvREFCNT_dec(s->obj);
334 PerlIOVia_close(pTHX_ PerlIO * f)
336 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
337 IV code = PerlIOBase_close(aTHX_ f);
339 PerlIOVia_method(aTHX_ f, MYMethod(CLOSE), G_SCALAR, Nullsv);
340 if (result && SvIV(result) != 0)
342 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
347 PerlIOVia_fileno(pTHX_ PerlIO * f)
349 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
351 PerlIOVia_method(aTHX_ f, MYMethod(FILENO), G_SCALAR, Nullsv);
352 return (result) ? SvIV(result) : PerlIO_fileno(PerlIONext(f));
356 PerlIOVia_binmode(pTHX_ PerlIO * f)
358 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
360 PerlIOVia_method(aTHX_ f, MYMethod(BINMODE), G_SCALAR, Nullsv);
361 if (!result || !SvOK(result)) {
369 PerlIOVia_seek(pTHX_ PerlIO * f, Off_t offset, int whence)
371 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
372 SV *offsv = sv_2mortal(sizeof(Off_t) > sizeof(IV)
373 ? newSVnv((NV)offset) : newSViv((IV)offset));
374 SV *whsv = sv_2mortal(newSViv(whence));
376 PerlIOVia_method(aTHX_ f, MYMethod(SEEK), G_SCALAR, offsv, whsv,
378 #if Off_t_size == 8 && defined(CONDOP_SIZE) && CONDOP_SIZE < Off_t_size
380 return (Off_t) SvIV(result);
384 return (result) ? SvIV(result) : -1;
389 PerlIOVia_tell(pTHX_ PerlIO * f)
391 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
393 PerlIOVia_method(aTHX_ f, MYMethod(TELL), G_SCALAR, Nullsv);
395 ? (SvNOK(result) ? (Off_t)SvNV(result) : (Off_t)SvIV(result))
400 PerlIOVia_unread(pTHX_ PerlIO * f, const void *vbuf, Size_t count)
402 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
403 SV *buf = newSVpvn_flags((char *) vbuf, count, SVs_TEMP);
405 PerlIOVia_method(aTHX_ f, MYMethod(UNREAD), G_SCALAR, buf, Nullsv);
407 return (SSize_t) SvIV(result);
409 return PerlIOBase_unread(aTHX_ f, vbuf, count);
414 PerlIOVia_read(pTHX_ PerlIO * f, void *vbuf, Size_t count)
417 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
418 if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS) {
419 rd = PerlIOBase_read(aTHX_ f, vbuf, count);
422 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
423 SV *buf = sv_2mortal(newSV(count));
424 SV *n = sv_2mortal(newSViv(count));
426 PerlIOVia_method(aTHX_ f, MYMethod(READ), G_SCALAR, buf, n,
429 rd = (SSize_t) SvIV(result);
430 Move(SvPVX(buf), vbuf, rd, char);
439 PerlIOVia_write(pTHX_ PerlIO * f, const void *vbuf, Size_t count)
441 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
442 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
443 SV *buf = newSVpvn((char *) vbuf, count);
445 PerlIOVia_method(aTHX_ f, MYMethod(WRITE), G_SCALAR, buf,
449 return (SSize_t) SvIV(result);
456 PerlIOVia_fill(pTHX_ PerlIO * f)
458 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
459 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
461 PerlIOVia_method(aTHX_ f, MYMethod(FILL), G_SCALAR, Nullsv);
463 SvREFCNT_dec(s->var);
466 if (result && SvOK(result)) {
468 const char *p = SvPV(result, len);
469 s->var = newSVpvn(p, len);
470 s->cnt = SvCUR(s->var);
474 PerlIOBase(f)->flags |= PERLIO_F_EOF;
480 PerlIOVia_flush(pTHX_ PerlIO * f)
482 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
484 PerlIOVia_method(aTHX_ f, MYMethod(FLUSH), G_SCALAR, Nullsv);
485 if (s->var && s->cnt > 0) {
486 SvREFCNT_dec(s->var);
489 return (result) ? SvIV(result) : 0;
493 PerlIOVia_get_base(pTHX_ PerlIO * f)
495 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
496 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
498 return (STDCHAR *) SvPVX(s->var);
501 return (STDCHAR *) NULL;
505 PerlIOVia_get_ptr(pTHX_ PerlIO * f)
507 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
508 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
510 STDCHAR *p = (STDCHAR *) (SvEND(s->var) - s->cnt);
514 return (STDCHAR *) NULL;
518 PerlIOVia_get_cnt(pTHX_ PerlIO * f)
520 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
521 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
530 PerlIOVia_bufsiz(pTHX_ PerlIO * f)
532 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
533 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
535 return SvCUR(s->var);
541 PerlIOVia_set_ptrcnt(pTHX_ PerlIO * f, STDCHAR * ptr, SSize_t cnt)
543 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
544 PERL_UNUSED_ARG(ptr);
549 PerlIOVia_setlinebuf(pTHX_ PerlIO * f)
551 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
552 PerlIOVia_method(aTHX_ f, MYMethod(SETLINEBUF), G_VOID, Nullsv);
553 PerlIOBase_setlinebuf(aTHX_ f);
557 PerlIOVia_clearerr(pTHX_ PerlIO * f)
559 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
560 PerlIOVia_method(aTHX_ f, MYMethod(CLEARERR), G_VOID, Nullsv);
561 PerlIOBase_clearerr(aTHX_ f);
565 PerlIOVia_error(pTHX_ PerlIO * f)
567 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
569 PerlIOVia_method(aTHX_ f, "ERROR", &s->mERROR, G_SCALAR, Nullsv);
570 return (result) ? SvIV(result) : PerlIOBase_error(aTHX_ f);
574 PerlIOVia_eof(pTHX_ PerlIO * f)
576 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
578 PerlIOVia_method(aTHX_ f, "EOF", &s->mEOF, G_SCALAR, Nullsv);
579 return (result) ? SvIV(result) : PerlIOBase_eof(aTHX_ f);
583 PerlIOVia_getarg(pTHX_ PerlIO * f, CLONE_PARAMS * param, int flags)
585 PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
586 PERL_UNUSED_ARG(param);
587 PERL_UNUSED_ARG(flags);
588 return PerlIOVia_method(aTHX_ f, MYMethod(GETARG), G_SCALAR, Nullsv);
592 PerlIOVia_dup(pTHX_ PerlIO * f, PerlIO * o, CLONE_PARAMS * param,
595 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
596 /* Most of the fields will lazily set themselves up as needed
597 stash and obj have been set up by the implied push
605 static PERLIO_FUNCS_DECL(PerlIO_object) = {
606 sizeof(PerlIO_funcs),
609 PERLIO_K_BUFFERED|PERLIO_K_DESTRUCT,
612 PerlIOVia_open, /* NULL, */
613 PerlIOVia_binmode, /* NULL, */
628 PerlIOVia_setlinebuf,
633 PerlIOVia_set_ptrcnt,
637 #endif /* Layers available */
639 MODULE = PerlIO::via PACKAGE = PerlIO::via
645 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_object));