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;
61 PerlIOVia_method(pTHX_ PerlIO *f,char *method,CV **save,int flags,...)
63 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
64 CV *cv = (*save) ? *save : PerlIOVia_fetchmethod(aTHX_ s,method,save);
77 while ((arg = va_arg(ap,SV *)))
85 GV *gv = newGVgen(HvNAME(s->stash));
87 s->fh = newRV_noinc((SV *)gv);
90 IoIFP(s->io) = PerlIONext(f);
91 IoOFP(s->io) = PerlIONext(f);
95 count = call_sv((SV *)cv,flags);
104 result = &PL_sv_undef;
113 PerlIOVia_pushed(PerlIO *f, const char *mode, SV *arg)
115 IV code = PerlIOBase_pushed(f,mode,Nullsv);
119 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
122 Perl_warn(aTHX_ "No package specified");
128 char *pkg = SvPV(arg,pkglen);
129 s->obj = SvREFCNT_inc(arg);
130 s->stash = gv_stashpvn(pkg, pkglen, FALSE);
133 SV *modesv = (mode) ? sv_2mortal(newSVpvn(mode,strlen(mode))) : Nullsv;
134 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(PUSHED),G_SCALAR,modesv,Nullsv);
137 if (sv_isobject(result))
139 s->obj = SvREFCNT_inc(result);
142 else if (SvIV(result) != 0)
145 if (PerlIOVia_fetchmethod(aTHX_ s,MYMethod(FILL)) == (CV *) -1)
146 PerlIOBase(f)->flags &= ~PERLIO_F_FASTGETS;
148 PerlIOBase(f)->flags |= PERLIO_F_FASTGETS;
152 Perl_warn(aTHX_ "Cannot find package '%.*s'",(int) pkglen,pkg);
168 PerlIOVia_open(pTHX_ PerlIO_funcs *self, AV *layers, IV n, const char *mode, int fd, int imode, int perm, PerlIO *f, int narg, SV **args)
172 f = PerlIO_push(aTHX_ PerlIO_allocate(aTHX),self,mode,PerlIOArg);
176 if (!PerlIO_push(aTHX_ f,self,mode,PerlIOArg))
181 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
185 SV *fdsv = sv_2mortal(newSViv(fd));
186 result = PerlIOVia_method(aTHX_ f,MYMethod(FDOPEN),G_SCALAR,fdsv,Nullsv);
192 SV *imodesv = sv_2mortal(newSViv(imode));
193 SV *permsv = sv_2mortal(newSViv(perm));
194 result = PerlIOVia_method(aTHX_ f,MYMethod(SYSOPEN),G_SCALAR,*args,imodesv,permsv,Nullsv);
198 result = PerlIOVia_method(aTHX_ f,MYMethod(OPEN),G_SCALAR,*args,Nullsv);
203 if (sv_isobject(result))
204 s->obj = SvREFCNT_inc(result);
205 else if (!SvTRUE(result))
217 PerlIOVia_popped(PerlIO *f)
220 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
221 PerlIOVia_method(aTHX_ f,MYMethod(POPPED),G_VOID,Nullsv);
224 SvREFCNT_dec(s->var);
241 SvREFCNT_dec(s->obj);
248 PerlIOVia_close(PerlIO *f)
251 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
252 IV code = PerlIOBase_close(f);
253 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(CLOSE),G_SCALAR,Nullsv);
254 if (result && SvIV(result) != 0)
256 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF|PERLIO_F_WRBUF);
261 PerlIOVia_fileno(PerlIO *f)
264 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
265 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILENO),G_SCALAR,Nullsv);
266 return (result) ? SvIV(result) : PerlIO_fileno(PerlIONext(f));
270 PerlIOVia_seek(PerlIO *f, Off_t offset, int whence)
273 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
274 SV *offsv = sv_2mortal(newSViv(offset));
275 SV *whsv = sv_2mortal(newSViv(offset));
276 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(SEEK),G_SCALAR,offsv,whsv,Nullsv);
277 return (result) ? SvIV(result) : -1;
281 PerlIOVia_tell(PerlIO *f)
284 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
285 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(TELL),G_SCALAR,Nullsv);
286 return (result) ? (Off_t) SvIV(result) : s->posn;
290 PerlIOVia_unread(PerlIO *f, const void *vbuf, Size_t count)
293 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
294 SV *buf = sv_2mortal(newSVpvn((char *)vbuf,count));
295 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(UNREAD),G_SCALAR,buf,Nullsv);
297 return (SSize_t) SvIV(result);
300 return PerlIOBase_unread(f,vbuf,count);
305 PerlIOVia_read(PerlIO *f, void *vbuf, Size_t count)
308 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
310 if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)
312 rd = PerlIOBase_read(f,vbuf,count);
317 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
318 SV *buf = sv_2mortal(newSV(count));
319 SV *n = sv_2mortal(newSViv(count));
320 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(READ),G_SCALAR,buf,n,Nullsv);
323 rd = (SSize_t) SvIV(result);
324 Move(SvPVX(buf),vbuf,rd,char);
333 PerlIOVia_write(PerlIO *f, const void *vbuf, Size_t count)
335 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE)
338 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
339 SV *buf = newSVpvn((char *)vbuf,count);
340 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(WRITE),G_SCALAR,buf,Nullsv);
343 return (SSize_t) SvIV(result);
350 PerlIOVia_fill(PerlIO *f)
352 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
355 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
356 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILL),G_SCALAR,Nullsv);
359 SvREFCNT_dec(s->var);
362 if (result && SvOK(result))
365 char *p = SvPV(result,len);
366 s->var = newSVpvn(p,len);
367 s->cnt = SvCUR(s->var);
371 PerlIOBase(f)->flags |= PERLIO_F_EOF;
377 PerlIOVia_flush(PerlIO *f)
380 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
381 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FLUSH),G_SCALAR,Nullsv);
382 if (s->var && s->cnt > 0)
384 SvREFCNT_dec(s->var);
387 return (result) ? SvIV(result) : 0;
391 PerlIOVia_get_base(PerlIO *f)
393 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
396 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
399 return (STDCHAR *)SvPVX(s->var);
402 return (STDCHAR *) Nullch;
406 PerlIOVia_get_ptr(PerlIO *f)
408 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
410 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
414 STDCHAR *p = (STDCHAR *)(SvEND(s->var) - s->cnt);
418 return (STDCHAR *) Nullch;
422 PerlIOVia_get_cnt(PerlIO *f)
424 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
426 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
436 PerlIOVia_bufsiz(PerlIO *f)
438 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
440 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
442 return SvCUR(s->var);
448 PerlIOVia_set_ptrcnt(PerlIO *f, STDCHAR *ptr, SSize_t cnt)
450 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
455 PerlIOVia_setlinebuf(PerlIO *f)
458 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
459 PerlIOVia_method(aTHX_ f,MYMethod(SETLINEBUF),G_VOID,Nullsv);
460 PerlIOBase_setlinebuf(f);
464 PerlIOVia_clearerr(PerlIO *f)
467 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
468 PerlIOVia_method(aTHX_ f,MYMethod(CLEARERR),G_VOID,Nullsv);
469 PerlIOBase_clearerr(f);
473 PerlIOVia_getarg(PerlIO *f)
476 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
477 return PerlIOVia_method(aTHX_ f,MYMethod(GETARG),G_SCALAR,Nullsv);
481 PerlIOVia_error(PerlIO *f)
484 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
485 SV *result = PerlIOVia_method(aTHX_ f,"ERROR",&s->mERROR,G_SCALAR,Nullsv);
486 return (result) ? SvIV(result) : PerlIOBase_error(f);
490 PerlIOVia_eof(PerlIO *f)
493 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
494 SV *result = PerlIOVia_method(aTHX_ f,"EOF",&s->mEOF,G_SCALAR,Nullsv);
495 return (result) ? SvIV(result) : PerlIOBase_eof(f);
498 PerlIO_funcs PerlIO_object = {
501 PERLIO_K_BUFFERED|PERLIO_K_DESTRUCT,
504 NULL, /* PerlIOVia_open, */
518 PerlIOVia_setlinebuf,
523 PerlIOVia_set_ptrcnt,
527 #endif /* Layers available */
529 MODULE = PerlIO::Via PACKAGE = PerlIO::Via
535 PerlIO_define_layer(aTHX_ &PerlIO_object);