1 #define PERL_NO_GET_CONTEXT
11 struct _PerlIO base; /* Base "class" info */
39 #define MYMethod(x) #x,&s->x
42 PerlIOVia_fetchmethod(pTHX_ PerlIOVia *s,char *method,CV **save)
44 GV *gv = gv_fetchmeth(s->stash,method,strlen(method),0);
46 Perl_warn(aTHX_ "Lookup %s::%s => %p",HvNAME(s->stash),method,gv);
50 return *save = GvCV(gv);
54 return *save = (CV *) -1;
59 PerlIOVia_method(pTHX_ PerlIO *f,char *method,CV **save,int flags,...)
61 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
62 CV *cv = (*save) ? *save : PerlIOVia_fetchmethod(aTHX_ s,method,save);
74 while ((arg = va_arg(ap,SV *)))
82 GV *gv = newGVgen(HvNAME(s->stash));
84 s->fh = newRV_noinc((SV *)gv);
87 IoIFP(s->io) = PerlIONext(f);
88 IoOFP(s->io) = PerlIONext(f);
92 count = call_sv((SV *)cv,flags);
101 result = &PL_sv_undef;
110 PerlIOVia_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
112 IV code = PerlIOBase_pushed(aTHX_ f,mode,Nullsv);
115 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
118 Perl_warn(aTHX_ "No package specified");
124 char *pkg = SvPV(arg,pkglen);
125 s->obj = SvREFCNT_inc(arg);
126 s->stash = gv_stashpvn(pkg, pkglen, FALSE);
129 SV *modesv = (mode) ? sv_2mortal(newSVpvn(mode,strlen(mode))) : Nullsv;
130 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(PUSHED),G_SCALAR,modesv,Nullsv);
133 if (sv_isobject(result))
135 s->obj = SvREFCNT_inc(result);
138 else if (SvIV(result) != 0)
141 if (PerlIOVia_fetchmethod(aTHX_ s,MYMethod(FILL)) == (CV *) -1)
142 PerlIOBase(f)->flags &= ~PERLIO_F_FASTGETS;
144 PerlIOBase(f)->flags |= PERLIO_F_FASTGETS;
148 Perl_warn(aTHX_ "Cannot find package '%.*s'",(int) pkglen,pkg);
164 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)
168 f = PerlIO_push(aTHX_ PerlIO_allocate(aTHX),self,mode,PerlIOArg);
172 if (!PerlIO_push(aTHX_ f,self,mode,PerlIOArg))
177 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
181 SV *fdsv = sv_2mortal(newSViv(fd));
182 result = PerlIOVia_method(aTHX_ f,MYMethod(FDOPEN),G_SCALAR,fdsv,Nullsv);
188 SV *imodesv = sv_2mortal(newSViv(imode));
189 SV *permsv = sv_2mortal(newSViv(perm));
190 result = PerlIOVia_method(aTHX_ f,MYMethod(SYSOPEN),G_SCALAR,*args,imodesv,permsv,Nullsv);
194 result = PerlIOVia_method(aTHX_ f,MYMethod(OPEN),G_SCALAR,*args,Nullsv);
199 if (sv_isobject(result))
200 s->obj = SvREFCNT_inc(result);
201 else if (!SvTRUE(result))
213 PerlIOVia_popped(pTHX_ PerlIO *f)
215 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
216 PerlIOVia_method(aTHX_ f,MYMethod(POPPED),G_VOID,Nullsv);
219 SvREFCNT_dec(s->var);
236 SvREFCNT_dec(s->obj);
243 PerlIOVia_close(pTHX_ PerlIO *f)
245 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
246 IV code = PerlIOBase_close(aTHX_ f);
247 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(CLOSE),G_SCALAR,Nullsv);
248 if (result && SvIV(result) != 0)
250 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF|PERLIO_F_WRBUF);
255 PerlIOVia_fileno(pTHX_ PerlIO *f)
257 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
258 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILENO),G_SCALAR,Nullsv);
259 return (result) ? SvIV(result) : PerlIO_fileno(PerlIONext(f));
263 PerlIOVia_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
265 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
266 SV *offsv = sv_2mortal(newSViv(offset));
267 SV *whsv = sv_2mortal(newSViv(whence));
268 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(SEEK),G_SCALAR,offsv,whsv,Nullsv);
269 return (result) ? SvIV(result) : -1;
273 PerlIOVia_tell(pTHX_ PerlIO *f)
275 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
276 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(TELL),G_SCALAR,Nullsv);
277 return (result) ? (Off_t) SvIV(result) : (Off_t) -1;
281 PerlIOVia_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
283 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
284 SV *buf = sv_2mortal(newSVpvn((char *)vbuf,count));
285 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(UNREAD),G_SCALAR,buf,Nullsv);
287 return (SSize_t) SvIV(result);
290 return PerlIOBase_unread(aTHX_ f,vbuf,count);
295 PerlIOVia_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
298 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
300 if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)
302 rd = PerlIOBase_read(aTHX_ f,vbuf,count);
306 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
307 SV *buf = sv_2mortal(newSV(count));
308 SV *n = sv_2mortal(newSViv(count));
309 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(READ),G_SCALAR,buf,n,Nullsv);
312 rd = (SSize_t) SvIV(result);
313 Move(SvPVX(buf),vbuf,rd,char);
322 PerlIOVia_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
324 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE)
326 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
327 SV *buf = newSVpvn((char *)vbuf,count);
328 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(WRITE),G_SCALAR,buf,Nullsv);
331 return (SSize_t) SvIV(result);
338 PerlIOVia_fill(pTHX_ PerlIO *f)
340 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
342 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
343 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILL),G_SCALAR,Nullsv);
346 SvREFCNT_dec(s->var);
349 if (result && SvOK(result))
352 char *p = SvPV(result,len);
353 s->var = newSVpvn(p,len);
354 s->cnt = SvCUR(s->var);
358 PerlIOBase(f)->flags |= PERLIO_F_EOF;
364 PerlIOVia_flush(pTHX_ PerlIO *f)
366 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
367 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FLUSH),G_SCALAR,Nullsv);
368 if (s->var && s->cnt > 0)
370 SvREFCNT_dec(s->var);
373 return (result) ? SvIV(result) : 0;
377 PerlIOVia_get_base(pTHX_ PerlIO *f)
379 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
381 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
384 return (STDCHAR *)SvPVX(s->var);
387 return (STDCHAR *) Nullch;
391 PerlIOVia_get_ptr(pTHX_ PerlIO *f)
393 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
395 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
398 STDCHAR *p = (STDCHAR *)(SvEND(s->var) - s->cnt);
402 return (STDCHAR *) Nullch;
406 PerlIOVia_get_cnt(pTHX_ PerlIO *f)
408 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
410 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
420 PerlIOVia_bufsiz(pTHX_ PerlIO *f)
422 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
424 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
426 return SvCUR(s->var);
432 PerlIOVia_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR *ptr, SSize_t cnt)
434 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
439 PerlIOVia_setlinebuf(pTHX_ PerlIO *f)
441 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
442 PerlIOVia_method(aTHX_ f,MYMethod(SETLINEBUF),G_VOID,Nullsv);
443 PerlIOBase_setlinebuf(aTHX_ f);
447 PerlIOVia_clearerr(pTHX_ PerlIO *f)
449 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
450 PerlIOVia_method(aTHX_ f,MYMethod(CLEARERR),G_VOID,Nullsv);
451 PerlIOBase_clearerr(aTHX_ f);
455 PerlIOVia_error(pTHX_ PerlIO *f)
457 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
458 SV *result = PerlIOVia_method(aTHX_ f,"ERROR",&s->mERROR,G_SCALAR,Nullsv);
459 return (result) ? SvIV(result) : PerlIOBase_error(aTHX_ f);
463 PerlIOVia_eof(pTHX_ PerlIO *f)
465 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
466 SV *result = PerlIOVia_method(aTHX_ f,"EOF",&s->mEOF,G_SCALAR,Nullsv);
467 return (result) ? SvIV(result) : PerlIOBase_eof(aTHX_ f);
471 PerlIOVia_getarg(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
473 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
474 return PerlIOVia_method(aTHX_ f,MYMethod(GETARG),G_SCALAR,Nullsv);
478 PerlIOVia_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
480 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags)))
482 /* Most of the fields will lazily set themselves up as needed
483 stash and obj have been set up by the implied push
489 PerlIO_funcs PerlIO_object = {
492 PERLIO_K_BUFFERED|PERLIO_K_DESTRUCT,
495 NULL, /* PerlIOVia_open, */
510 PerlIOVia_setlinebuf,
515 PerlIOVia_set_ptrcnt,
519 #endif /* Layers available */
521 MODULE = PerlIO::Via PACKAGE = PerlIO::Via
527 PerlIO_define_layer(aTHX_ &PerlIO_object);