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 PerlIOVia_method(pTHX_ PerlIO *f,char *method,CV **save,int flags,...)
62 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
63 CV *cv = (*save) ? *save : PerlIOVia_fetchmethod(aTHX_ s,method,save);
75 while ((arg = va_arg(ap,SV *)))
83 GV *gv = newGVgen(HvNAME(s->stash));
85 s->fh = newRV_noinc((SV *)gv);
88 IoIFP(s->io) = PerlIONext(f);
89 IoOFP(s->io) = PerlIONext(f);
93 count = call_sv((SV *)cv,flags);
102 result = &PL_sv_undef;
111 PerlIOVia_pushed(PerlIO *f, const char *mode, SV *arg)
113 IV code = PerlIOBase_pushed(f,mode,Nullsv);
117 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
120 Perl_warn(aTHX_ "No package specified");
126 char *pkg = SvPV(arg,pkglen);
127 s->obj = SvREFCNT_inc(arg);
128 s->stash = gv_stashpvn(pkg, pkglen, FALSE);
131 SV *modesv = (mode) ? sv_2mortal(newSVpvn(mode,strlen(mode))) : Nullsv;
132 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(PUSHED),G_SCALAR,modesv,Nullsv);
135 if (sv_isobject(result))
137 s->obj = SvREFCNT_inc(result);
140 else if (SvIV(result) != 0)
143 if (PerlIOVia_fetchmethod(aTHX_ s,MYMethod(FILL)) == (CV *) -1)
144 PerlIOBase(f)->flags &= ~PERLIO_F_FASTGETS;
146 PerlIOBase(f)->flags |= PERLIO_F_FASTGETS;
150 Perl_warn(aTHX_ "Cannot find package '%.*s'",(int) pkglen,pkg);
166 PerlIOVia_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers, IV n, const char *mode, int fd, int imode, int perm, PerlIO *f, int narg, SV **args)
170 f = PerlIO_push(aTHX_ PerlIO_allocate(aTHX),self,mode,PerlIOArg);
174 if (!PerlIO_push(aTHX_ f,self,mode,PerlIOArg))
179 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
183 SV *fdsv = sv_2mortal(newSViv(fd));
184 result = PerlIOVia_method(aTHX_ f,MYMethod(FDOPEN),G_SCALAR,fdsv,Nullsv);
190 SV *imodesv = sv_2mortal(newSViv(imode));
191 SV *permsv = sv_2mortal(newSViv(perm));
192 result = PerlIOVia_method(aTHX_ f,MYMethod(SYSOPEN),G_SCALAR,*args,imodesv,permsv,Nullsv);
196 result = PerlIOVia_method(aTHX_ f,MYMethod(OPEN),G_SCALAR,*args,Nullsv);
201 if (sv_isobject(result))
202 s->obj = SvREFCNT_inc(result);
203 else if (!SvTRUE(result))
215 PerlIOVia_popped(PerlIO *f)
218 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
219 PerlIOVia_method(aTHX_ f,MYMethod(POPPED),G_VOID,Nullsv);
222 SvREFCNT_dec(s->var);
239 SvREFCNT_dec(s->obj);
246 PerlIOVia_close(PerlIO *f)
249 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
250 IV code = PerlIOBase_close(f);
251 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(CLOSE),G_SCALAR,Nullsv);
252 if (result && SvIV(result) != 0)
254 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF|PERLIO_F_WRBUF);
259 PerlIOVia_fileno(PerlIO *f)
262 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
263 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILENO),G_SCALAR,Nullsv);
264 return (result) ? SvIV(result) : PerlIO_fileno(PerlIONext(f));
268 PerlIOVia_seek(PerlIO *f, Off_t offset, int whence)
271 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
272 SV *offsv = sv_2mortal(newSViv(offset));
273 SV *whsv = sv_2mortal(newSViv(offset));
274 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(SEEK),G_SCALAR,offsv,whsv,Nullsv);
275 return (result) ? SvIV(result) : -1;
279 PerlIOVia_tell(PerlIO *f)
282 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
283 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(TELL),G_SCALAR,Nullsv);
284 return (result) ? (Off_t) SvIV(result) : s->posn;
288 PerlIOVia_unread(PerlIO *f, const void *vbuf, Size_t count)
291 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
292 SV *buf = sv_2mortal(newSVpvn((char *)vbuf,count));
293 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(UNREAD),G_SCALAR,buf,Nullsv);
295 return (SSize_t) SvIV(result);
298 return PerlIOBase_unread(f,vbuf,count);
303 PerlIOVia_read(PerlIO *f, void *vbuf, Size_t count)
306 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
308 if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)
310 rd = PerlIOBase_read(f,vbuf,count);
315 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
316 SV *buf = sv_2mortal(newSV(count));
317 SV *n = sv_2mortal(newSViv(count));
318 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(READ),G_SCALAR,buf,n,Nullsv);
321 rd = (SSize_t) SvIV(result);
322 Move(SvPVX(buf),vbuf,rd,char);
331 PerlIOVia_write(PerlIO *f, const void *vbuf, Size_t count)
333 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE)
336 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
337 SV *buf = newSVpvn((char *)vbuf,count);
338 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(WRITE),G_SCALAR,buf,Nullsv);
341 return (SSize_t) SvIV(result);
348 PerlIOVia_fill(PerlIO *f)
350 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
353 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
354 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILL),G_SCALAR,Nullsv);
357 SvREFCNT_dec(s->var);
360 if (result && SvOK(result))
363 char *p = SvPV(result,len);
364 s->var = newSVpvn(p,len);
365 s->cnt = SvCUR(s->var);
369 PerlIOBase(f)->flags |= PERLIO_F_EOF;
375 PerlIOVia_flush(PerlIO *f)
378 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
379 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FLUSH),G_SCALAR,Nullsv);
380 if (s->var && s->cnt > 0)
382 SvREFCNT_dec(s->var);
385 return (result) ? SvIV(result) : 0;
389 PerlIOVia_get_base(PerlIO *f)
391 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
393 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
396 return (STDCHAR *)SvPVX(s->var);
399 return (STDCHAR *) Nullch;
403 PerlIOVia_get_ptr(PerlIO *f)
405 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
407 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
410 STDCHAR *p = (STDCHAR *)(SvEND(s->var) - s->cnt);
414 return (STDCHAR *) Nullch;
418 PerlIOVia_get_cnt(PerlIO *f)
420 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
422 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
432 PerlIOVia_bufsiz(PerlIO *f)
434 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
436 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
438 return SvCUR(s->var);
444 PerlIOVia_set_ptrcnt(PerlIO *f, STDCHAR *ptr, SSize_t cnt)
446 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
451 PerlIOVia_setlinebuf(PerlIO *f)
454 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
455 PerlIOVia_method(aTHX_ f,MYMethod(SETLINEBUF),G_VOID,Nullsv);
456 PerlIOBase_setlinebuf(f);
460 PerlIOVia_clearerr(PerlIO *f)
463 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
464 PerlIOVia_method(aTHX_ f,MYMethod(CLEARERR),G_VOID,Nullsv);
465 PerlIOBase_clearerr(f);
469 PerlIOVia_getarg(PerlIO *f)
472 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
473 return PerlIOVia_method(aTHX_ f,MYMethod(GETARG),G_SCALAR,Nullsv);
477 PerlIOVia_error(PerlIO *f)
480 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
481 SV *result = PerlIOVia_method(aTHX_ f,"ERROR",&s->mERROR,G_SCALAR,Nullsv);
482 return (result) ? SvIV(result) : PerlIOBase_error(f);
486 PerlIOVia_eof(PerlIO *f)
489 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
490 SV *result = PerlIOVia_method(aTHX_ f,"EOF",&s->mEOF,G_SCALAR,Nullsv);
491 return (result) ? SvIV(result) : PerlIOBase_eof(f);
495 PerlIOVia_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
497 /* FIXME - Needs more work */
498 return PerlIOBase_dup(aTHX_ f, o, param);
501 PerlIO_funcs PerlIO_object = {
504 PERLIO_K_BUFFERED|PERLIO_K_DESTRUCT,
507 NULL, /* PerlIOVia_open, */
522 PerlIOVia_setlinebuf,
527 PerlIOVia_set_ptrcnt,
531 #endif /* Layers available */
533 MODULE = PerlIO::Via PACKAGE = PerlIO::Via
539 PerlIO_define_layer(aTHX_ &PerlIO_object);