[perl5.git] / ext / PerlIO / via / via.xs

#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#ifdef PERLIO_LAYERS

#include "perliol.h"

typedef struct
{
 struct _PerlIO base;       /* Base "class" info */
 HV *		stash;
 SV *		obj;
 SV *		var;
 SSize_t	cnt;
 IO *		io;
 SV *		fh;
 CV *PUSHED;
 CV *POPPED;
 CV *OPEN;
 CV *FDOPEN;
 CV *SYSOPEN;
 CV *GETARG;
 CV *FILENO;
 CV *READ;
 CV *WRITE;
 CV *FILL;
 CV *CLOSE;
 CV *SEEK;
 CV *TELL;
 CV *UNREAD;
 CV *FLUSH;
 CV *SETLINEBUF;
 CV *CLEARERR;
 CV *mERROR;
 CV *mEOF;
 CV *BINMODE;
 CV *UTF8;
} PerlIOVia;

#define MYMethod(x) #x,&s->x

CV *
PerlIOVia_fetchmethod(pTHX_ PerlIOVia * s, char *method, CV ** save)
{
    GV *gv = gv_fetchmeth(s->stash, method, strlen(method), 0);
#if 0
    Perl_warn(aTHX_ "Lookup %s::%s => %p", HvNAME_get(s->stash), method, gv);
#endif
    if (gv) {
	return *save = GvCV(gv);
    }
    else {
	return *save = (CV *) - 1;
    }
}

/*
 * Try and call method, possibly via cached lookup.
 * If method does not exist return Nullsv (caller may fallback to another approach
 * If method does exist call it with flags passing variable number of args
 * Last arg is a "filehandle" to layer below (if present)
 * Returns scalar returned by method (if any) otherwise sv_undef
 */

SV *
PerlIOVia_method(pTHX_ PerlIO * f, char *method, CV ** save, int flags,
		 ...)
{
    PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
    CV *cv =
	(*save) ? *save : PerlIOVia_fetchmethod(aTHX_ s, method, save);
    SV *result = Nullsv;
    va_list ap;
    va_start(ap, flags);
    if (cv != (CV *) - 1) {
	IV count;
	dSP;
	SV *arg;
	PUSHSTACKi(PERLSI_MAGIC);
	ENTER;
	SPAGAIN;
	PUSHMARK(sp);
	XPUSHs(s->obj);
	while ((arg = va_arg(ap, SV *))) {
	    XPUSHs(arg);
	}
	if (*PerlIONext(f)) {
	    if (!s->fh) {
		GV *gv = newGVgen(HvNAME_get(s->stash));
		GvIOp(gv) = newIO();
		s->fh = newRV_noinc((SV *) gv);
		s->io = GvIOp(gv);
	    }
	    IoIFP(s->io) = PerlIONext(f);
	    IoOFP(s->io) = PerlIONext(f);
	    XPUSHs(s->fh);
	}
	else {
	    PerlIO_debug("No next\n");
	    /* FIXME: How should this work for OPEN etc? */
	}
	PUTBACK;
	count = call_sv((SV *) cv, flags);
	if (count) {
	    SPAGAIN;
	    result = POPs;
	    PUTBACK;
	}
	else {
	    result = &PL_sv_undef;
	}
	LEAVE;
	POPSTACK;
    }
    va_end(ap);
    return result;
}

IV
PerlIOVia_pushed(pTHX_ PerlIO * f, const char *mode, SV * arg,
		 PerlIO_funcs * tab)
{
    IV code = PerlIOBase_pushed(aTHX_ f, mode, Nullsv, tab);
    if (code == 0) {
	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	if (!arg) {
	    if (ckWARN(WARN_LAYER))
		Perl_warner(aTHX_ packWARN(WARN_LAYER),
			    "No package specified");
	    errno = EINVAL;
	    code = -1;
	}
	else {
	    STRLEN pkglen = 0;
	    const char *pkg = SvPV(arg, pkglen);
	    s->obj = SvREFCNT_inc(arg);
	    s->stash = gv_stashpvn(pkg, pkglen, FALSE);
	    if (!s->stash) {
		s->obj =
		    newSVpvn(Perl_form(aTHX_ "PerlIO::via::%s", pkg),
			     pkglen + 13);
		SvREFCNT_dec(arg);
		s->stash = gv_stashpvn(SvPVX_const(s->obj), pkglen + 13, FALSE);
	    }
	    if (s->stash) {
		char lmode[8];
		SV *modesv;
		SV *result;
		if (!mode) {
		    /* binmode() passes NULL - so find out what mode is */
		    mode = PerlIO_modestr(f,lmode);
		}
		modesv = sv_2mortal(newSVpvn(mode, strlen(mode)));
		result = PerlIOVia_method(aTHX_ f, MYMethod(PUSHED), G_SCALAR,
				     modesv, Nullsv);
		if (result) {
		    if (sv_isobject(result)) {
			s->obj = SvREFCNT_inc(result);
			SvREFCNT_dec(arg);
		    }
		    else if (SvIV(result) != 0)
			return SvIV(result);
		}
		else {
		    goto push_failed;
		}
		modesv = (*PerlIONext(f) && (PerlIOBase(PerlIONext(f))->flags & PERLIO_F_UTF8))
                           ? &PL_sv_yes : &PL_sv_no;
		result = PerlIOVia_method(aTHX_ f, MYMethod(UTF8), G_SCALAR, modesv, Nullsv);
		if (result && SvTRUE(result)) {
		    PerlIOBase(f)->flags |= PERLIO_F_UTF8;
		}
		else {
		    PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
		}
		if (PerlIOVia_fetchmethod(aTHX_ s, MYMethod(FILL)) ==
		    (CV *) - 1)
		    PerlIOBase(f)->flags &= ~PERLIO_F_FASTGETS;
		else
		    PerlIOBase(f)->flags |= PERLIO_F_FASTGETS;
	    }
	    else {
		if (ckWARN(WARN_LAYER))
		    Perl_warner(aTHX_ packWARN(WARN_LAYER),
				"Cannot find package '%.*s'", (int) pkglen,
				pkg);
push_failed:
#ifdef ENOSYS
		errno = ENOSYS;
#else
#ifdef ENOENT
		errno = ENOENT;
#endif
#endif
		code = -1;
	    }
	}
    }
    return code;
}

PerlIO *
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)
{
    if (!f) {
	f = PerlIO_push(aTHX_ PerlIO_allocate(aTHX), self, mode,
			PerlIOArg);
    }
    else {
	/* Reopen */
	if (!PerlIO_push(aTHX_ f, self, mode, PerlIOArg))
	    return NULL;
    }
    if (f) {
	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	SV *result = Nullsv;
	if (fd >= 0) {
	    SV *fdsv = sv_2mortal(newSViv(fd));
	    result =
		PerlIOVia_method(aTHX_ f, MYMethod(FDOPEN), G_SCALAR, fdsv,
				 Nullsv);
	}
	else if (narg > 0) {
	    if (*mode == '#') {
		SV *imodesv = sv_2mortal(newSViv(imode));
		SV *permsv = sv_2mortal(newSViv(perm));
		result =
		    PerlIOVia_method(aTHX_ f, MYMethod(SYSOPEN), G_SCALAR,
				     *args, imodesv, permsv, Nullsv);
	    }
	    else {
		result =
		    PerlIOVia_method(aTHX_ f, MYMethod(OPEN), G_SCALAR,
				     *args, Nullsv);
	    }
	}
	if (result) {
	    if (sv_isobject(result))
		s->obj = SvREFCNT_inc(result);
	    else if (!SvTRUE(result)) {
		return NULL;
	    }
	}
	else {
	    /* Required open method not present */
	    PerlIO_funcs *tab = NULL;
	    IV m = n - 1;
	    while (m >= 0) {
		PerlIO_funcs *t =
		    PerlIO_layer_fetch(aTHX_ layers, m, NULL);
		if (t && t->Open) {
		    tab = t;
		    break;
		}
		m--;
	    }
	    if (tab) {
		if ((*tab->Open) (aTHX_ tab, layers, m, mode, fd, imode,
				  perm, PerlIONext(f), narg, args)) {
		    PerlIO_debug("Opened with %s => %p->%p\n", tab->name,
				 PerlIONext(f), *PerlIONext(f));
		    if (m + 1 < n) {
			/*
			 * More layers above the one that we used to open -
			 * apply them now
			 */
			if (PerlIO_apply_layera
			    (aTHX_ PerlIONext(f), mode, layers, m + 1,
			     n) != 0) {
			    /* If pushing layers fails close the file */
			    PerlIO_close(f);
			    f = NULL;
			}
		    }
		    /* FIXME - Call an OPENED method here ? */
		    return f;
		}
		else {
		    PerlIO_debug("Open fail %s => %p->%p\n", tab->name,
				 PerlIONext(f), *PerlIONext(f));
		    /* Sub-layer open failed */
		}
	    }
	    else {
	         PerlIO_debug("Nothing to open with");
		/* Nothing to do the open */
	    }
	    PerlIO_pop(aTHX_ f);
	    return NULL;
	}
    }
    return f;
}

IV
PerlIOVia_popped(pTHX_ PerlIO * f)
{
    PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
    PerlIOVia_method(aTHX_ f, MYMethod(POPPED), G_VOID, Nullsv);
    if (s->var) {
	SvREFCNT_dec(s->var);
	s->var = Nullsv;
    }

    if (s->io) {
	IoIFP(s->io) = NULL;
	IoOFP(s->io) = NULL;
    }
    if (s->fh) {
	SvREFCNT_dec(s->fh);
	s->fh = Nullsv;
	s->io = NULL;
    }
    if (s->obj) {
	SvREFCNT_dec(s->obj);
	s->obj = Nullsv;
    }
    return 0;
}

IV
PerlIOVia_close(pTHX_ PerlIO * f)
{
    PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
    IV code = PerlIOBase_close(aTHX_ f);
    SV *result =
	PerlIOVia_method(aTHX_ f, MYMethod(CLOSE), G_SCALAR, Nullsv);
    if (result && SvIV(result) != 0)
	code = SvIV(result);
    PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
    return code;
}

IV
PerlIOVia_fileno(pTHX_ PerlIO * f)
{
    PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
    SV *result =
	PerlIOVia_method(aTHX_ f, MYMethod(FILENO), G_SCALAR, Nullsv);
    return (result) ? SvIV(result) : PerlIO_fileno(PerlIONext(f));
}

IV
PerlIOVia_binmode(pTHX_ PerlIO * f)
{
    PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
    SV *result =
	PerlIOVia_method(aTHX_ f, MYMethod(BINMODE), G_SCALAR, Nullsv);
    if (!result || !SvOK(result)) {
	PerlIO_pop(aTHX_ f);
	return 0;
    }
    return SvIV(result);
}

IV
PerlIOVia_seek(pTHX_ PerlIO * f, Off_t offset, int whence)
{
    PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
    SV *offsv = sv_2mortal(sizeof(Off_t) > sizeof(IV)
			   ? newSVnv((NV)offset) : newSViv((IV)offset));
    SV *whsv = sv_2mortal(newSViv(whence));
    SV *result =
	PerlIOVia_method(aTHX_ f, MYMethod(SEEK), G_SCALAR, offsv, whsv,
			 Nullsv);
#if Off_t_size == 8 && defined(CONDOP_SIZE) && CONDOP_SIZE < Off_t_size
    if (result)
	return (Off_t) SvIV(result);
    else
	return (Off_t) -1;
#else
    return (result) ? SvIV(result) : -1;
#endif
}

Off_t
PerlIOVia_tell(pTHX_ PerlIO * f)
{
    PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
    SV *result =
	PerlIOVia_method(aTHX_ f, MYMethod(TELL), G_SCALAR, Nullsv);
    return (result)
	   ? (SvNOK(result) ? (Off_t)SvNV(result) : (Off_t)SvIV(result))
	   : (Off_t) - 1;
}

SSize_t
PerlIOVia_unread(pTHX_ PerlIO * f, const void *vbuf, Size_t count)
{
    PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
    SV *buf = sv_2mortal(newSVpvn((char *) vbuf, count));
    SV *result =
	PerlIOVia_method(aTHX_ f, MYMethod(UNREAD), G_SCALAR, buf, Nullsv);
    if (result)
	return (SSize_t) SvIV(result);
    else {
	return PerlIOBase_unread(aTHX_ f, vbuf, count);
    }
}

SSize_t
PerlIOVia_read(pTHX_ PerlIO * f, void *vbuf, Size_t count)
{
    SSize_t rd = 0;
    if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS) {
	    rd = PerlIOBase_read(aTHX_ f, vbuf, count);
	}
	else {
	    PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	    SV *buf = sv_2mortal(newSV(count));
	    SV *n = sv_2mortal(newSViv(count));
	    SV *result =
		PerlIOVia_method(aTHX_ f, MYMethod(READ), G_SCALAR, buf, n,
				 Nullsv);
	    if (result) {
		rd = (SSize_t) SvIV(result);
		Move(SvPVX(buf), vbuf, rd, char);
		return rd;
	    }
	}
    }
    return rd;
}

SSize_t
PerlIOVia_write(pTHX_ PerlIO * f, const void *vbuf, Size_t count)
{
    if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	SV *buf = newSVpvn((char *) vbuf, count);
	SV *result =
	    PerlIOVia_method(aTHX_ f, MYMethod(WRITE), G_SCALAR, buf,
			     Nullsv);
	SvREFCNT_dec(buf);
	if (result)
	    return (SSize_t) SvIV(result);
	return -1;
    }
    return 0;
}

IV
PerlIOVia_fill(pTHX_ PerlIO * f)
{
    if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	SV *result =
	    PerlIOVia_method(aTHX_ f, MYMethod(FILL), G_SCALAR, Nullsv);
	if (s->var) {
	    SvREFCNT_dec(s->var);
	    s->var = Nullsv;
	}
	if (result && SvOK(result)) {
	    STRLEN len = 0;
	    const char *p = SvPV(result, len);
	    s->var = newSVpvn(p, len);
	    s->cnt = SvCUR(s->var);
	    return 0;
	}
	else
	    PerlIOBase(f)->flags |= PERLIO_F_EOF;
    }
    return -1;
}

IV
PerlIOVia_flush(pTHX_ PerlIO * f)
{
    PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
    SV *result =
	PerlIOVia_method(aTHX_ f, MYMethod(FLUSH), G_SCALAR, Nullsv);
    if (s->var && s->cnt > 0) {
	SvREFCNT_dec(s->var);
	s->var = Nullsv;
    }
    return (result) ? SvIV(result) : 0;
}

STDCHAR *
PerlIOVia_get_base(pTHX_ PerlIO * f)
{
    if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	if (s->var) {
	    return (STDCHAR *) SvPVX(s->var);
	}
    }
    return (STDCHAR *) Nullch;
}

STDCHAR *
PerlIOVia_get_ptr(pTHX_ PerlIO * f)
{
    if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	if (s->var) {
	    STDCHAR *p = (STDCHAR *) (SvEND(s->var) - s->cnt);
	    return p;
	}
    }
    return (STDCHAR *) Nullch;
}

SSize_t
PerlIOVia_get_cnt(pTHX_ PerlIO * f)
{
    if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	if (s->var) {
	    return s->cnt;
	}
    }
    return 0;
}

Size_t
PerlIOVia_bufsiz(pTHX_ PerlIO * f)
{
    if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	if (s->var)
	    return SvCUR(s->var);
    }
    return 0;
}

void
PerlIOVia_set_ptrcnt(pTHX_ PerlIO * f, STDCHAR * ptr, SSize_t cnt)
{
    PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
    s->cnt = cnt;
}

void
PerlIOVia_setlinebuf(pTHX_ PerlIO * f)
{
    PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
    PerlIOVia_method(aTHX_ f, MYMethod(SETLINEBUF), G_VOID, Nullsv);
    PerlIOBase_setlinebuf(aTHX_ f);
}

void
PerlIOVia_clearerr(pTHX_ PerlIO * f)
{
    PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
    PerlIOVia_method(aTHX_ f, MYMethod(CLEARERR), G_VOID, Nullsv);
    PerlIOBase_clearerr(aTHX_ f);
}

IV
PerlIOVia_error(pTHX_ PerlIO * f)
{
    PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
    SV *result =
	PerlIOVia_method(aTHX_ f, "ERROR", &s->mERROR, G_SCALAR, Nullsv);
    return (result) ? SvIV(result) : PerlIOBase_error(aTHX_ f);
}

IV
PerlIOVia_eof(pTHX_ PerlIO * f)
{
    PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
    SV *result =
	PerlIOVia_method(aTHX_ f, "EOF", &s->mEOF, G_SCALAR, Nullsv);
    return (result) ? SvIV(result) : PerlIOBase_eof(aTHX_ f);
}

SV *
PerlIOVia_getarg(pTHX_ PerlIO * f, CLONE_PARAMS * param, int flags)
{
    PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
    return PerlIOVia_method(aTHX_ f, MYMethod(GETARG), G_SCALAR, Nullsv);
}

PerlIO *
PerlIOVia_dup(pTHX_ PerlIO * f, PerlIO * o, CLONE_PARAMS * param,
	      int flags)
{
    if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
	/* Most of the fields will lazily set themselves up as needed
	   stash and obj have been set up by the implied push
	 */
    }
    return f;
}


PERLIO_FUNCS_DECL(PerlIO_object) = {
 sizeof(PerlIO_funcs),
 "via",
 sizeof(PerlIOVia),
 PERLIO_K_BUFFERED|PERLIO_K_DESTRUCT,
 PerlIOVia_pushed,
 PerlIOVia_popped,
 PerlIOVia_open, /* NULL, */
 PerlIOVia_binmode, /* NULL, */
 PerlIOVia_getarg,
 PerlIOVia_fileno,
 PerlIOVia_dup,
 PerlIOVia_read,
 PerlIOVia_unread,
 PerlIOVia_write,
 PerlIOVia_seek,
 PerlIOVia_tell,
 PerlIOVia_close,
 PerlIOVia_flush,
 PerlIOVia_fill,
 PerlIOVia_eof,
 PerlIOVia_error,
 PerlIOVia_clearerr,
 PerlIOVia_setlinebuf,
 PerlIOVia_get_base,
 PerlIOVia_bufsiz,
 PerlIOVia_get_ptr,
 PerlIOVia_get_cnt,
 PerlIOVia_set_ptrcnt,
};


#endif /* Layers available */

MODULE = PerlIO::via	PACKAGE = PerlIO::via
PROTOTYPES: ENABLE;

BOOT:
{
#ifdef PERLIO_LAYERS
 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_object));
#endif
}
Commit	Line	Data
e7a1fdd7 NIS	1	#define PERL_NO_GET_CONTEXT
	2	#include "EXTERN.h"
	3	#include "perl.h"
	4	#include "XSUB.h"
	5	#ifdef PERLIO_LAYERS
	6
	7	#include "perliol.h"
	8
	9	typedef struct
	10	{
	11	struct _PerlIO base; /* Base "class" info */
	12	HV * stash;
	13	SV * obj;
	14	SV * var;
	15	SSize_t cnt;
e7a1fdd7 NIS	16	IO * io;
	17	SV * fh;
	18	CV *PUSHED;
	19	CV *POPPED;
	20	CV *OPEN;
	21	CV *FDOPEN;
	22	CV *SYSOPEN;
	23	CV *GETARG;
	24	CV *FILENO;
	25	CV *READ;
	26	CV *WRITE;
	27	CV *FILL;
	28	CV *CLOSE;
	29	CV *SEEK;
	30	CV *TELL;
	31	CV *UNREAD;
	32	CV *FLUSH;
	33	CV *SETLINEBUF;
	34	CV *CLEARERR;
c7997937	35	CV *mERROR;
e7a1fdd7	36	CV *mEOF;
86e05cf2	37	CV *BINMODE;
802588c3	38	CV *UTF8;
e7a1fdd7 NIS	39	} PerlIOVia;
	40
	41	#define MYMethod(x) #x,&s->x
	42
	43	CV *
fc040538	44	PerlIOVia_fetchmethod(pTHX_ PerlIOVia * s, char method, CV * save)
e7a1fdd7	45	{
fc040538	46	GV *gv = gv_fetchmeth(s->stash, method, strlen(method), 0);
e7a1fdd7	47	#if 0
bfcb3514	48	Perl_warn(aTHX_ "Lookup %s::%s => %p", HvNAME_get(s->stash), method, gv);
e7a1fdd7	49	#endif
fc040538 NIS	50	if (gv) {
	51	return *save = GvCV(gv);
	52	}
	53	else {
	54	return save = (CV ) - 1;
	55	}
e7a1fdd7 NIS	56	}
e7a1fdd7 NIS	57
d9dac8cd NIS	58	/*
	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
	64	*/
	65
e7a1fdd7	66	SV *
fc040538 NIS	67	PerlIOVia_method(pTHX_ PerlIO * f, char method, CV * save, int flags,
fc040538 NIS	68	...)
e7a1fdd7	69	{
fc040538 NIS	70	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	71	CV *cv =
	72	(save) ? save : PerlIOVia_fetchmethod(aTHX_ s, method, save);
	73	SV *result = Nullsv;
	74	va_list ap;
	75	va_start(ap, flags);
	76	if (cv != (CV *) - 1) {
	77	IV count;
	78	dSP;
	79	SV *arg;
	80	PUSHSTACKi(PERLSI_MAGIC);
	81	ENTER;
	82	SPAGAIN;
	83	PUSHMARK(sp);
	84	XPUSHs(s->obj);
	85	while ((arg = va_arg(ap, SV *))) {
	86	XPUSHs(arg);
	87	}
	88	if (*PerlIONext(f)) {
	89	if (!s->fh) {
bfcb3514	90	GV *gv = newGVgen(HvNAME_get(s->stash));
fc040538 NIS	91	GvIOp(gv) = newIO();
	92	s->fh = newRV_noinc((SV *) gv);
	93	s->io = GvIOp(gv);
	94	}
	95	IoIFP(s->io) = PerlIONext(f);
	96	IoOFP(s->io) = PerlIONext(f);
	97	XPUSHs(s->fh);
	98	}
	99	else {
	100	PerlIO_debug("No next\n");
30ef3321	101	/* FIXME: How should this work for OPEN etc? */
fc040538 NIS	102	}
	103	PUTBACK;
	104	count = call_sv((SV *) cv, flags);
	105	if (count) {
	106	SPAGAIN;
	107	result = POPs;
	108	PUTBACK;
	109	}
	110	else {
	111	result = &PL_sv_undef;
	112	}
	113	LEAVE;
	114	POPSTACK;
e7a1fdd7	115	}
fc040538 NIS	116	va_end(ap);
fc040538 NIS	117	return result;
e7a1fdd7 NIS	118	}
	119
	120	IV
fc040538 NIS	121	PerlIOVia_pushed(pTHX_ PerlIO * f, const char mode, SV arg,
fc040538 NIS	122	PerlIO_funcs * tab)
e7a1fdd7	123	{
fc040538 NIS	124	IV code = PerlIOBase_pushed(aTHX_ f, mode, Nullsv, tab);
	125	if (code == 0) {
	126	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	127	if (!arg) {
	128	if (ckWARN(WARN_LAYER))
	129	Perl_warner(aTHX_ packWARN(WARN_LAYER),
	130	"No package specified");
	131	errno = EINVAL;
	132	code = -1;
	133	}
	134	else {
	135	STRLEN pkglen = 0;
7248df0a	136	const char *pkg = SvPV(arg, pkglen);
fc040538 NIS	137	s->obj = SvREFCNT_inc(arg);
	138	s->stash = gv_stashpvn(pkg, pkglen, FALSE);
	139	if (!s->stash) {
	140	s->obj =
e934609f	141	newSVpvn(Perl_form(aTHX_ "PerlIO::via::%s", pkg),
fc040538 NIS	142	pkglen + 13);
fc040538 NIS	143	SvREFCNT_dec(arg);
aa07b2f6	144	s->stash = gv_stashpvn(SvPVX_const(s->obj), pkglen + 13, FALSE);
fc040538 NIS	145	}
fc040538 NIS	146	if (s->stash) {
abc0a015 NIS	147	char lmode[8];
	148	SV *modesv;
	149	SV *result;
	150	if (!mode) {
	151	/* binmode() passes NULL - so find out what mode is */
	152	mode = PerlIO_modestr(f,lmode);
	153	}
	154	modesv = sv_2mortal(newSVpvn(mode, strlen(mode)));
	155	result = PerlIOVia_method(aTHX_ f, MYMethod(PUSHED), G_SCALAR,
fc040538 NIS	156	modesv, Nullsv);
	157	if (result) {
	158	if (sv_isobject(result)) {
	159	s->obj = SvREFCNT_inc(result);
	160	SvREFCNT_dec(arg);
	161	}
	162	else if (SvIV(result) != 0)
	163	return SvIV(result);
	164	}
4f776d34 RC	165	else {
	166	goto push_failed;
	167	}
802588c3 NIS	168	modesv = (*PerlIONext(f) && (PerlIOBase(PerlIONext(f))->flags & PERLIO_F_UTF8))
	169	? &PL_sv_yes : &PL_sv_no;
	170	result = PerlIOVia_method(aTHX_ f, MYMethod(UTF8), G_SCALAR, modesv, Nullsv);
	171	if (result && SvTRUE(result)) {
7248df0a	172	PerlIOBase(f)->flags \|= PERLIO_F_UTF8;
802588c3 NIS	173	}
	174	else {
	175	PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
	176	}
fc040538 NIS	177	if (PerlIOVia_fetchmethod(aTHX_ s, MYMethod(FILL)) ==
	178	(CV *) - 1)
	179	PerlIOBase(f)->flags &= ~PERLIO_F_FASTGETS;
	180	else
	181	PerlIOBase(f)->flags \|= PERLIO_F_FASTGETS;
	182	}
	183	else {
	184	if (ckWARN(WARN_LAYER))
	185	Perl_warner(aTHX_ packWARN(WARN_LAYER),
	186	"Cannot find package '%.*s'", (int) pkglen,
	187	pkg);
4f776d34	188	push_failed:
267cbce7	189	#ifdef ENOSYS
fc040538	190	errno = ENOSYS;
267cbce7 NIS	191	#else
267cbce7 NIS	192	#ifdef ENOENT
fc040538	193	errno = ENOENT;
267cbce7 NIS	194	#endif
267cbce7 NIS	195	#endif
fc040538 NIS	196	code = -1;
	197	}
	198	}
e7a1fdd7	199	}
fc040538	200	return code;
e7a1fdd7 NIS	201	}
	202
	203	PerlIO *
fc040538 NIS	204	PerlIOVia_open(pTHX_ PerlIO_funcs * self, PerlIO_list_t * layers,
	205	IV n, const char *mode, int fd, int imode, int perm,
	206	PerlIO * f, int narg, SV ** args)
e7a1fdd7	207	{
fc040538 NIS	208	if (!f) {
	209	f = PerlIO_push(aTHX_ PerlIO_allocate(aTHX), self, mode,
	210	PerlIOArg);
e7a1fdd7	211	}
fc040538 NIS	212	else {
	213	/* Reopen */
	214	if (!PerlIO_push(aTHX_ f, self, mode, PerlIOArg))
	215	return NULL;
e7a1fdd7	216	}
fc040538 NIS	217	if (f) {
	218	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	219	SV *result = Nullsv;
	220	if (fd >= 0) {
	221	SV *fdsv = sv_2mortal(newSViv(fd));
	222	result =
	223	PerlIOVia_method(aTHX_ f, MYMethod(FDOPEN), G_SCALAR, fdsv,
	224	Nullsv);
	225	}
	226	else if (narg > 0) {
	227	if (*mode == '#') {
	228	SV *imodesv = sv_2mortal(newSViv(imode));
	229	SV *permsv = sv_2mortal(newSViv(perm));
	230	result =
	231	PerlIOVia_method(aTHX_ f, MYMethod(SYSOPEN), G_SCALAR,
	232	*args, imodesv, permsv, Nullsv);
	233	}
	234	else {
	235	result =
	236	PerlIOVia_method(aTHX_ f, MYMethod(OPEN), G_SCALAR,
	237	*args, Nullsv);
d9dac8cd	238	}
d9dac8cd	239	}
fc040538 NIS	240	if (result) {
	241	if (sv_isobject(result))
	242	s->obj = SvREFCNT_inc(result);
	243	else if (!SvTRUE(result)) {
	244	return NULL;
	245	}
	246	}
	247	else {
	248	/* Required open method not present */
	249	PerlIO_funcs *tab = NULL;
d26d6e72	250	IV m = n - 1;
fc040538 NIS	251	while (m >= 0) {
	252	PerlIO_funcs *t =
	253	PerlIO_layer_fetch(aTHX_ layers, m, NULL);
	254	if (t && t->Open) {
	255	tab = t;
	256	break;
	257	}
d26d6e72	258	m--;
fc040538 NIS	259	}
	260	if (tab) {
	261	if ((*tab->Open) (aTHX_ tab, layers, m, mode, fd, imode,
	262	perm, PerlIONext(f), narg, args)) {
	263	PerlIO_debug("Opened with %s => %p->%p\n", tab->name,
	264	PerlIONext(f), *PerlIONext(f));
	265	if (m + 1 < n) {
	266	/*
	267	* More layers above the one that we used to open -
	268	* apply them now
	269	*/
	270	if (PerlIO_apply_layera
	271	(aTHX_ PerlIONext(f), mode, layers, m + 1,
	272	n) != 0) {
	273	/* If pushing layers fails close the file */
	274	PerlIO_close(f);
	275	f = NULL;
	276	}
d9dac8cd	277	}
30ef3321	278	/* FIXME - Call an OPENED method here ? */
fc040538 NIS	279	return f;
	280	}
	281	else {
30ef3321 NIS	282	PerlIO_debug("Open fail %s => %p->%p\n", tab->name,
30ef3321 NIS	283	PerlIONext(f), *PerlIONext(f));
fc040538	284	/* Sub-layer open failed */
d9dac8cd	285	}
d9dac8cd NIS	286	}
d9dac8cd NIS	287	else {
30ef3321	288	PerlIO_debug("Nothing to open with");
fc040538	289	/* Nothing to do the open */
d9dac8cd	290	}
30ef3321	291	PerlIO_pop(aTHX_ f);
fc040538	292	return NULL;
d9dac8cd	293	}
d9dac8cd	294	}
fc040538	295	return f;
e7a1fdd7 NIS	296	}
	297
	298	IV
fc040538	299	PerlIOVia_popped(pTHX_ PerlIO * f)
e7a1fdd7	300	{
fc040538 NIS	301	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	302	PerlIOVia_method(aTHX_ f, MYMethod(POPPED), G_VOID, Nullsv);
	303	if (s->var) {
	304	SvREFCNT_dec(s->var);
	305	s->var = Nullsv;
	306	}
	307
	308	if (s->io) {
	309	IoIFP(s->io) = NULL;
	310	IoOFP(s->io) = NULL;
	311	}
	312	if (s->fh) {
	313	SvREFCNT_dec(s->fh);
	314	s->fh = Nullsv;
	315	s->io = NULL;
	316	}
	317	if (s->obj) {
	318	SvREFCNT_dec(s->obj);
	319	s->obj = Nullsv;
	320	}
	321	return 0;
e7a1fdd7 NIS	322	}
	323
	324	IV
fc040538	325	PerlIOVia_close(pTHX_ PerlIO * f)
e7a1fdd7	326	{
fc040538 NIS	327	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	328	IV code = PerlIOBase_close(aTHX_ f);
	329	SV *result =
	330	PerlIOVia_method(aTHX_ f, MYMethod(CLOSE), G_SCALAR, Nullsv);
	331	if (result && SvIV(result) != 0)
	332	code = SvIV(result);
	333	PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF \| PERLIO_F_WRBUF);
	334	return code;
e7a1fdd7 NIS	335	}
	336
	337	IV
fc040538	338	PerlIOVia_fileno(pTHX_ PerlIO * f)
e7a1fdd7	339	{
fc040538 NIS	340	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	341	SV *result =
	342	PerlIOVia_method(aTHX_ f, MYMethod(FILENO), G_SCALAR, Nullsv);
	343	return (result) ? SvIV(result) : PerlIO_fileno(PerlIONext(f));
e7a1fdd7 NIS	344	}
	345
	346	IV
fc040538	347	PerlIOVia_binmode(pTHX_ PerlIO * f)
86e05cf2	348	{
fc040538 NIS	349	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	350	SV *result =
	351	PerlIOVia_method(aTHX_ f, MYMethod(BINMODE), G_SCALAR, Nullsv);
	352	if (!result \|\| !SvOK(result)) {
	353	PerlIO_pop(aTHX_ f);
	354	return 0;
	355	}
	356	return SvIV(result);
86e05cf2 NIS	357	}
86e05cf2 NIS	358
6efa4722	359	IV
fc040538	360	PerlIOVia_seek(pTHX_ PerlIO * f, Off_t offset, int whence)
e7a1fdd7	361	{
fc040538	362	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
4a9d6100 GS	363	SV *offsv = sv_2mortal(sizeof(Off_t) > sizeof(IV)
4a9d6100 GS	364	? newSVnv((NV)offset) : newSViv((IV)offset));
fc040538 NIS	365	SV *whsv = sv_2mortal(newSViv(whence));
	366	SV *result =
	367	PerlIOVia_method(aTHX_ f, MYMethod(SEEK), G_SCALAR, offsv, whsv,
	368	Nullsv);
b6290011 JH	369	#if Off_t_size == 8 && defined(CONDOP_SIZE) && CONDOP_SIZE < Off_t_size
	370	if (result)
	371	return (Off_t) SvIV(result);
	372	else
	373	return (Off_t) -1;
	374	#else
fc040538	375	return (result) ? SvIV(result) : -1;
b6290011	376	#endif
e7a1fdd7 NIS	377	}
	378
	379	Off_t
fc040538	380	PerlIOVia_tell(pTHX_ PerlIO * f)
e7a1fdd7	381	{
fc040538 NIS	382	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	383	SV *result =
	384	PerlIOVia_method(aTHX_ f, MYMethod(TELL), G_SCALAR, Nullsv);
4a9d6100 GS	385	return (result)
	386	? (SvNOK(result) ? (Off_t)SvNV(result) : (Off_t)SvIV(result))
	387	: (Off_t) - 1;
e7a1fdd7 NIS	388	}
	389
	390	SSize_t
fc040538	391	PerlIOVia_unread(pTHX_ PerlIO * f, const void *vbuf, Size_t count)
e7a1fdd7	392	{
fc040538 NIS	393	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	394	SV buf = sv_2mortal(newSVpvn((char ) vbuf, count));
	395	SV *result =
	396	PerlIOVia_method(aTHX_ f, MYMethod(UNREAD), G_SCALAR, buf, Nullsv);
	397	if (result)
	398	return (SSize_t) SvIV(result);
	399	else {
	400	return PerlIOBase_unread(aTHX_ f, vbuf, count);
	401	}
e7a1fdd7 NIS	402	}
	403
	404	SSize_t
fc040538	405	PerlIOVia_read(pTHX_ PerlIO * f, void *vbuf, Size_t count)
e7a1fdd7	406	{
fc040538 NIS	407	SSize_t rd = 0;
	408	if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	409	if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS) {
	410	rd = PerlIOBase_read(aTHX_ f, vbuf, count);
	411	}
	412	else {
	413	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	414	SV *buf = sv_2mortal(newSV(count));
	415	SV *n = sv_2mortal(newSViv(count));
	416	SV *result =
	417	PerlIOVia_method(aTHX_ f, MYMethod(READ), G_SCALAR, buf, n,
	418	Nullsv);
	419	if (result) {
	420	rd = (SSize_t) SvIV(result);
	421	Move(SvPVX(buf), vbuf, rd, char);
	422	return rd;
	423	}
	424	}
e7a1fdd7	425	}
fc040538	426	return rd;
e7a1fdd7 NIS	427	}
	428
	429	SSize_t
fc040538	430	PerlIOVia_write(pTHX_ PerlIO * f, const void *vbuf, Size_t count)
e7a1fdd7	431	{
fc040538 NIS	432	if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
	433	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	434	SV buf = newSVpvn((char ) vbuf, count);
	435	SV *result =
	436	PerlIOVia_method(aTHX_ f, MYMethod(WRITE), G_SCALAR, buf,
	437	Nullsv);
	438	SvREFCNT_dec(buf);
	439	if (result)
	440	return (SSize_t) SvIV(result);
	441	return -1;
	442	}
	443	return 0;
e7a1fdd7 NIS	444	}
	445
	446	IV
fc040538	447	PerlIOVia_fill(pTHX_ PerlIO * f)
e7a1fdd7	448	{
fc040538 NIS	449	if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	450	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	451	SV *result =
	452	PerlIOVia_method(aTHX_ f, MYMethod(FILL), G_SCALAR, Nullsv);
	453	if (s->var) {
	454	SvREFCNT_dec(s->var);
	455	s->var = Nullsv;
	456	}
	457	if (result && SvOK(result)) {
	458	STRLEN len = 0;
7248df0a	459	const char *p = SvPV(result, len);
fc040538 NIS	460	s->var = newSVpvn(p, len);
	461	s->cnt = SvCUR(s->var);
	462	return 0;
	463	}
	464	else
	465	PerlIOBase(f)->flags \|= PERLIO_F_EOF;
e7a1fdd7	466	}
fc040538	467	return -1;
e7a1fdd7 NIS	468	}
	469
	470	IV
fc040538	471	PerlIOVia_flush(pTHX_ PerlIO * f)
e7a1fdd7	472	{
fc040538 NIS	473	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	474	SV *result =
	475	PerlIOVia_method(aTHX_ f, MYMethod(FLUSH), G_SCALAR, Nullsv);
	476	if (s->var && s->cnt > 0) {
	477	SvREFCNT_dec(s->var);
	478	s->var = Nullsv;
	479	}
	480	return (result) ? SvIV(result) : 0;
e7a1fdd7 NIS	481	}
	482
	483	STDCHAR *
fc040538	484	PerlIOVia_get_base(pTHX_ PerlIO * f)
e7a1fdd7	485	{
fc040538 NIS	486	if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	487	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	488	if (s->var) {
	489	return (STDCHAR *) SvPVX(s->var);
	490	}
e7a1fdd7	491	}
fc040538	492	return (STDCHAR *) Nullch;
e7a1fdd7 NIS	493	}
	494
	495	STDCHAR *
fc040538	496	PerlIOVia_get_ptr(pTHX_ PerlIO * f)
e7a1fdd7	497	{
fc040538 NIS	498	if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	499	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	500	if (s->var) {
	501	STDCHAR p = (STDCHAR ) (SvEND(s->var) - s->cnt);
	502	return p;
	503	}
e7a1fdd7	504	}
fc040538	505	return (STDCHAR *) Nullch;
e7a1fdd7 NIS	506	}
	507
	508	SSize_t
fc040538	509	PerlIOVia_get_cnt(pTHX_ PerlIO * f)
e7a1fdd7	510	{
fc040538 NIS	511	if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	512	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	513	if (s->var) {
	514	return s->cnt;
	515	}
e7a1fdd7	516	}
fc040538	517	return 0;
e7a1fdd7 NIS	518	}
	519
	520	Size_t
fc040538	521	PerlIOVia_bufsiz(pTHX_ PerlIO * f)
e7a1fdd7	522	{
fc040538 NIS	523	if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	524	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	525	if (s->var)
	526	return SvCUR(s->var);
	527	}
	528	return 0;
e7a1fdd7 NIS	529	}
	530
	531	void
fc040538	532	PerlIOVia_set_ptrcnt(pTHX_ PerlIO * f, STDCHAR * ptr, SSize_t cnt)
e7a1fdd7	533	{
fc040538 NIS	534	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
fc040538 NIS	535	s->cnt = cnt;
e7a1fdd7 NIS	536	}
	537
	538	void
fc040538	539	PerlIOVia_setlinebuf(pTHX_ PerlIO * f)
e7a1fdd7	540	{
fc040538 NIS	541	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	542	PerlIOVia_method(aTHX_ f, MYMethod(SETLINEBUF), G_VOID, Nullsv);
	543	PerlIOBase_setlinebuf(aTHX_ f);
e7a1fdd7 NIS	544	}
	545
	546	void
fc040538	547	PerlIOVia_clearerr(pTHX_ PerlIO * f)
e7a1fdd7	548	{
fc040538 NIS	549	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	550	PerlIOVia_method(aTHX_ f, MYMethod(CLEARERR), G_VOID, Nullsv);
	551	PerlIOBase_clearerr(aTHX_ f);
e7a1fdd7 NIS	552	}
e7a1fdd7 NIS	553
c7997937	554	IV
fc040538	555	PerlIOVia_error(pTHX_ PerlIO * f)
e7a1fdd7	556	{
fc040538 NIS	557	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	558	SV *result =
	559	PerlIOVia_method(aTHX_ f, "ERROR", &s->mERROR, G_SCALAR, Nullsv);
	560	return (result) ? SvIV(result) : PerlIOBase_error(aTHX_ f);
e7a1fdd7 NIS	561	}
	562
	563	IV
fc040538	564	PerlIOVia_eof(pTHX_ PerlIO * f)
e7a1fdd7	565	{
fc040538 NIS	566	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	567	SV *result =
	568	PerlIOVia_method(aTHX_ f, "EOF", &s->mEOF, G_SCALAR, Nullsv);
	569	return (result) ? SvIV(result) : PerlIOBase_eof(aTHX_ f);
e7a1fdd7 NIS	570	}
e7a1fdd7 NIS	571
ecdeb87c	572	SV *
fc040538	573	PerlIOVia_getarg(pTHX_ PerlIO * f, CLONE_PARAMS * param, int flags)
ecdeb87c	574	{
fc040538 NIS	575	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
fc040538 NIS	576	return PerlIOVia_method(aTHX_ f, MYMethod(GETARG), G_SCALAR, Nullsv);
ecdeb87c NIS	577	}
ecdeb87c NIS	578
8cf8f3d1	579	PerlIO *
fc040538 NIS	580	PerlIOVia_dup(pTHX_ PerlIO * f, PerlIO * o, CLONE_PARAMS * param,
fc040538 NIS	581	int flags)
8cf8f3d1	582	{
fc040538 NIS	583	if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
	584	/* Most of the fields will lazily set themselves up as needed
	585	stash and obj have been set up by the implied push
	586	*/
	587	}
	588	return f;
8cf8f3d1 NIS	589	}
8cf8f3d1 NIS	590
fc040538 NIS	591
fc040538 NIS	592
27da23d5	593	PERLIO_FUNCS_DECL(PerlIO_object) = {
2dc2558e	594	sizeof(PerlIO_funcs),
e934609f	595	"via",
e7a1fdd7 NIS	596	sizeof(PerlIOVia),
	597	PERLIO_K_BUFFERED\|PERLIO_K_DESTRUCT,
	598	PerlIOVia_pushed,
	599	PerlIOVia_popped,
d9dac8cd	600	PerlIOVia_open, /* NULL, */
86e05cf2	601	PerlIOVia_binmode, /* NULL, */
e7a1fdd7 NIS	602	PerlIOVia_getarg,
e7a1fdd7 NIS	603	PerlIOVia_fileno,
8cf8f3d1	604	PerlIOVia_dup,
e7a1fdd7 NIS	605	PerlIOVia_read,
	606	PerlIOVia_unread,
	607	PerlIOVia_write,
	608	PerlIOVia_seek,
	609	PerlIOVia_tell,
	610	PerlIOVia_close,
	611	PerlIOVia_flush,
	612	PerlIOVia_fill,
	613	PerlIOVia_eof,
	614	PerlIOVia_error,
	615	PerlIOVia_clearerr,
	616	PerlIOVia_setlinebuf,
	617	PerlIOVia_get_base,
	618	PerlIOVia_bufsiz,
	619	PerlIOVia_get_ptr,
	620	PerlIOVia_get_cnt,
	621	PerlIOVia_set_ptrcnt,
	622	};
	623
	624
	625	#endif /* Layers available */
	626
e934609f	627	MODULE = PerlIO::via PACKAGE = PerlIO::via
e7a1fdd7 NIS	628	PROTOTYPES: ENABLE;
	629
	630	BOOT:
	631	{
	632	#ifdef PERLIO_LAYERS
27da23d5	633	PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_object));
e7a1fdd7 NIS	634	#endif
	635	}
	636
fc040538	637
30ef3321 NIS	638
	639
	640