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(PerlIO *f, const char *mode, SV *arg)
112 IV code = PerlIOBase_pushed(f,mode,Nullsv);
116 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
119 Perl_warn(aTHX_ "No package specified");
125 char *pkg = SvPV(arg,pkglen);
126 s->obj = SvREFCNT_inc(arg);
127 s->stash = gv_stashpvn(pkg, pkglen, FALSE);
130 SV *modesv = (mode) ? sv_2mortal(newSVpvn(mode,strlen(mode))) : Nullsv;
131 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(PUSHED),G_SCALAR,modesv,Nullsv);
134 if (sv_isobject(result))
136 s->obj = SvREFCNT_inc(result);
139 else if (SvIV(result) != 0)
142 if (PerlIOVia_fetchmethod(aTHX_ s,MYMethod(FILL)) == (CV *) -1)
143 PerlIOBase(f)->flags &= ~PERLIO_F_FASTGETS;
145 PerlIOBase(f)->flags |= PERLIO_F_FASTGETS;
149 Perl_warn(aTHX_ "Cannot find package '%.*s'",(int) pkglen,pkg);
165 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)
169 f = PerlIO_push(aTHX_ PerlIO_allocate(aTHX),self,mode,PerlIOArg);
173 if (!PerlIO_push(aTHX_ f,self,mode,PerlIOArg))
178 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
182 SV *fdsv = sv_2mortal(newSViv(fd));
183 result = PerlIOVia_method(aTHX_ f,MYMethod(FDOPEN),G_SCALAR,fdsv,Nullsv);
189 SV *imodesv = sv_2mortal(newSViv(imode));
190 SV *permsv = sv_2mortal(newSViv(perm));
191 result = PerlIOVia_method(aTHX_ f,MYMethod(SYSOPEN),G_SCALAR,*args,imodesv,permsv,Nullsv);
195 result = PerlIOVia_method(aTHX_ f,MYMethod(OPEN),G_SCALAR,*args,Nullsv);
200 if (sv_isobject(result))
201 s->obj = SvREFCNT_inc(result);
202 else if (!SvTRUE(result))
214 PerlIOVia_popped(PerlIO *f)
217 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
218 PerlIOVia_method(aTHX_ f,MYMethod(POPPED),G_VOID,Nullsv);
221 SvREFCNT_dec(s->var);
238 SvREFCNT_dec(s->obj);
245 PerlIOVia_close(PerlIO *f)
248 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
249 IV code = PerlIOBase_close(f);
250 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(CLOSE),G_SCALAR,Nullsv);
251 if (result && SvIV(result) != 0)
253 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF|PERLIO_F_WRBUF);
258 PerlIOVia_fileno(PerlIO *f)
261 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
262 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILENO),G_SCALAR,Nullsv);
263 return (result) ? SvIV(result) : PerlIO_fileno(PerlIONext(f));
267 PerlIOVia_seek(PerlIO *f, Off_t offset, int whence)
270 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
271 SV *offsv = sv_2mortal(newSViv(offset));
272 SV *whsv = sv_2mortal(newSViv(whence));
273 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(SEEK),G_SCALAR,offsv,whsv,Nullsv);
274 return (result) ? SvIV(result) : -1;
278 PerlIOVia_tell(PerlIO *f)
281 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
282 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(TELL),G_SCALAR,Nullsv);
283 return (result) ? (Off_t) SvIV(result) : (Off_t) -1;
287 PerlIOVia_unread(PerlIO *f, const void *vbuf, Size_t count)
290 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
291 SV *buf = sv_2mortal(newSVpvn((char *)vbuf,count));
292 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(UNREAD),G_SCALAR,buf,Nullsv);
294 return (SSize_t) SvIV(result);
297 return PerlIOBase_unread(f,vbuf,count);
302 PerlIOVia_read(PerlIO *f, void *vbuf, Size_t count)
305 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
307 if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)
309 rd = PerlIOBase_read(f,vbuf,count);
314 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
315 SV *buf = sv_2mortal(newSV(count));
316 SV *n = sv_2mortal(newSViv(count));
317 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(READ),G_SCALAR,buf,n,Nullsv);
320 rd = (SSize_t) SvIV(result);
321 Move(SvPVX(buf),vbuf,rd,char);
330 PerlIOVia_write(PerlIO *f, const void *vbuf, Size_t count)
332 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE)
335 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
336 SV *buf = newSVpvn((char *)vbuf,count);
337 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(WRITE),G_SCALAR,buf,Nullsv);
340 return (SSize_t) SvIV(result);
347 PerlIOVia_fill(PerlIO *f)
349 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
352 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
353 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILL),G_SCALAR,Nullsv);
356 SvREFCNT_dec(s->var);
359 if (result && SvOK(result))
362 char *p = SvPV(result,len);
363 s->var = newSVpvn(p,len);
364 s->cnt = SvCUR(s->var);
368 PerlIOBase(f)->flags |= PERLIO_F_EOF;
374 PerlIOVia_flush(PerlIO *f)
377 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
378 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FLUSH),G_SCALAR,Nullsv);
379 if (s->var && s->cnt > 0)
381 SvREFCNT_dec(s->var);
384 return (result) ? SvIV(result) : 0;
388 PerlIOVia_get_base(PerlIO *f)
390 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
392 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
395 return (STDCHAR *)SvPVX(s->var);
398 return (STDCHAR *) Nullch;
402 PerlIOVia_get_ptr(PerlIO *f)
404 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
406 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
409 STDCHAR *p = (STDCHAR *)(SvEND(s->var) - s->cnt);
413 return (STDCHAR *) Nullch;
417 PerlIOVia_get_cnt(PerlIO *f)
419 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
421 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
431 PerlIOVia_bufsiz(PerlIO *f)
433 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
435 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
437 return SvCUR(s->var);
443 PerlIOVia_set_ptrcnt(PerlIO *f, STDCHAR *ptr, SSize_t cnt)
445 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
450 PerlIOVia_setlinebuf(PerlIO *f)
453 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
454 PerlIOVia_method(aTHX_ f,MYMethod(SETLINEBUF),G_VOID,Nullsv);
455 PerlIOBase_setlinebuf(f);
459 PerlIOVia_clearerr(PerlIO *f)
462 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
463 PerlIOVia_method(aTHX_ f,MYMethod(CLEARERR),G_VOID,Nullsv);
464 PerlIOBase_clearerr(f);
468 PerlIOVia_getarg(PerlIO *f)
471 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
472 return PerlIOVia_method(aTHX_ f,MYMethod(GETARG),G_SCALAR,Nullsv);
476 PerlIOVia_error(PerlIO *f)
479 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
480 SV *result = PerlIOVia_method(aTHX_ f,"ERROR",&s->mERROR,G_SCALAR,Nullsv);
481 return (result) ? SvIV(result) : PerlIOBase_error(f);
485 PerlIOVia_eof(PerlIO *f)
488 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
489 SV *result = PerlIOVia_method(aTHX_ f,"EOF",&s->mEOF,G_SCALAR,Nullsv);
490 return (result) ? SvIV(result) : PerlIOBase_eof(f);
494 PerlIOVia_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param)
496 if ((f = PerlIOBase_dup(aTHX_ f, o, param)))
498 /* Most of the fields will lazily set them selves up as needed
499 stash and obj have been set up by the implied push
505 PerlIO_funcs PerlIO_object = {
508 PERLIO_K_BUFFERED|PERLIO_K_DESTRUCT,
511 NULL, /* PerlIOVia_open, */
526 PerlIOVia_setlinebuf,
531 PerlIOVia_set_ptrcnt,
535 #endif /* Layers available */
537 MODULE = PerlIO::Via PACKAGE = PerlIO::Via
543 PerlIO_define_layer(aTHX_ &PerlIO_object);