[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, const 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, const 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((SV *) gv);
		s->io = GvIOp(gv);
		if (gv) {
		    /* shamelessly stolen from IO::File's new_tmpfile() */
		    hv_delete(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), G_DISCARD);
		}
	    }
	    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, 0);
	    if (!s->stash) {
		SvREFCNT_dec(s->obj);
		s->obj =
		    newSVpvn(Perl_form(aTHX_ "PerlIO::via::%s", pkg),
			     pkglen + 13);
		s->stash = gv_stashpvn(SvPVX_const(s->obj), pkglen + 13, 0);
	    }
	    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)) {
			SvREFCNT_dec(s->obj);
			s->obj = SvREFCNT_inc(result);
		    }
		    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 *) NULL;
}

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 *) NULL;
}

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 *
d3f5e399	44	PerlIOVia_fetchmethod(pTHX_ PerlIOVia * s, const 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 *
d3f5e399	67	PerlIOVia_method(pTHX_ PerlIO * f, const char method, CV * save, int flags,
fc040538	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	91	GvIOp(gv) = newIO();
5a33563f	92	s->fh = newRV((SV *) gv);
fc040538	93	s->io = GvIOp(gv);
8d06e08c MHM	94	if (gv) {
	95	/* shamelessly stolen from IO::File's new_tmpfile() */
	96	hv_delete(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), G_DISCARD);
	97	}
fc040538 NIS	98	}
	99	IoIFP(s->io) = PerlIONext(f);
	100	IoOFP(s->io) = PerlIONext(f);
	101	XPUSHs(s->fh);
	102	}
	103	else {
	104	PerlIO_debug("No next\n");
30ef3321	105	/* FIXME: How should this work for OPEN etc? */
fc040538 NIS	106	}
	107	PUTBACK;
	108	count = call_sv((SV *) cv, flags);
	109	if (count) {
	110	SPAGAIN;
	111	result = POPs;
	112	PUTBACK;
	113	}
	114	else {
	115	result = &PL_sv_undef;
	116	}
	117	LEAVE;
	118	POPSTACK;
e7a1fdd7	119	}
fc040538 NIS	120	va_end(ap);
fc040538 NIS	121	return result;
e7a1fdd7 NIS	122	}
	123
	124	IV
fc040538 NIS	125	PerlIOVia_pushed(pTHX_ PerlIO * f, const char mode, SV arg,
fc040538 NIS	126	PerlIO_funcs * tab)
e7a1fdd7	127	{
fc040538 NIS	128	IV code = PerlIOBase_pushed(aTHX_ f, mode, Nullsv, tab);
	129	if (code == 0) {
	130	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	131	if (!arg) {
	132	if (ckWARN(WARN_LAYER))
	133	Perl_warner(aTHX_ packWARN(WARN_LAYER),
	134	"No package specified");
	135	errno = EINVAL;
	136	code = -1;
	137	}
	138	else {
	139	STRLEN pkglen = 0;
7248df0a	140	const char *pkg = SvPV(arg, pkglen);
fc040538	141	s->obj = SvREFCNT_inc(arg);
da51bb9b	142	s->stash = gv_stashpvn(pkg, pkglen, 0);
fc040538	143	if (!s->stash) {
3904eff9	144	SvREFCNT_dec(s->obj);
fc040538	145	s->obj =
e934609f	146	newSVpvn(Perl_form(aTHX_ "PerlIO::via::%s", pkg),
fc040538	147	pkglen + 13);
da51bb9b	148	s->stash = gv_stashpvn(SvPVX_const(s->obj), pkglen + 13, 0);
fc040538 NIS	149	}
fc040538 NIS	150	if (s->stash) {
abc0a015 NIS	151	char lmode[8];
	152	SV *modesv;
	153	SV *result;
	154	if (!mode) {
	155	/* binmode() passes NULL - so find out what mode is */
	156	mode = PerlIO_modestr(f,lmode);
	157	}
	158	modesv = sv_2mortal(newSVpvn(mode, strlen(mode)));
	159	result = PerlIOVia_method(aTHX_ f, MYMethod(PUSHED), G_SCALAR,
fc040538 NIS	160	modesv, Nullsv);
	161	if (result) {
	162	if (sv_isobject(result)) {
3904eff9	163	SvREFCNT_dec(s->obj);
fc040538	164	s->obj = SvREFCNT_inc(result);
fc040538 NIS	165	}
	166	else if (SvIV(result) != 0)
	167	return SvIV(result);
	168	}
4f776d34 RC	169	else {
	170	goto push_failed;
	171	}
802588c3 NIS	172	modesv = (*PerlIONext(f) && (PerlIOBase(PerlIONext(f))->flags & PERLIO_F_UTF8))
	173	? &PL_sv_yes : &PL_sv_no;
	174	result = PerlIOVia_method(aTHX_ f, MYMethod(UTF8), G_SCALAR, modesv, Nullsv);
	175	if (result && SvTRUE(result)) {
7248df0a	176	PerlIOBase(f)->flags \|= PERLIO_F_UTF8;
802588c3 NIS	177	}
	178	else {
	179	PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
	180	}
fc040538 NIS	181	if (PerlIOVia_fetchmethod(aTHX_ s, MYMethod(FILL)) ==
	182	(CV *) - 1)
	183	PerlIOBase(f)->flags &= ~PERLIO_F_FASTGETS;
	184	else
	185	PerlIOBase(f)->flags \|= PERLIO_F_FASTGETS;
	186	}
	187	else {
	188	if (ckWARN(WARN_LAYER))
	189	Perl_warner(aTHX_ packWARN(WARN_LAYER),
	190	"Cannot find package '%.*s'", (int) pkglen,
	191	pkg);
4f776d34	192	push_failed:
267cbce7	193	#ifdef ENOSYS
fc040538	194	errno = ENOSYS;
267cbce7 NIS	195	#else
267cbce7 NIS	196	#ifdef ENOENT
fc040538	197	errno = ENOENT;
267cbce7 NIS	198	#endif
267cbce7 NIS	199	#endif
fc040538 NIS	200	code = -1;
	201	}
	202	}
e7a1fdd7	203	}
fc040538	204	return code;
e7a1fdd7 NIS	205	}
	206
	207	PerlIO *
fc040538 NIS	208	PerlIOVia_open(pTHX_ PerlIO_funcs * self, PerlIO_list_t * layers,
	209	IV n, const char *mode, int fd, int imode, int perm,
	210	PerlIO * f, int narg, SV ** args)
e7a1fdd7	211	{
fc040538 NIS	212	if (!f) {
	213	f = PerlIO_push(aTHX_ PerlIO_allocate(aTHX), self, mode,
	214	PerlIOArg);
e7a1fdd7	215	}
fc040538 NIS	216	else {
	217	/* Reopen */
	218	if (!PerlIO_push(aTHX_ f, self, mode, PerlIOArg))
	219	return NULL;
e7a1fdd7	220	}
fc040538 NIS	221	if (f) {
	222	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	223	SV *result = Nullsv;
	224	if (fd >= 0) {
	225	SV *fdsv = sv_2mortal(newSViv(fd));
	226	result =
	227	PerlIOVia_method(aTHX_ f, MYMethod(FDOPEN), G_SCALAR, fdsv,
	228	Nullsv);
	229	}
	230	else if (narg > 0) {
	231	if (*mode == '#') {
	232	SV *imodesv = sv_2mortal(newSViv(imode));
	233	SV *permsv = sv_2mortal(newSViv(perm));
	234	result =
	235	PerlIOVia_method(aTHX_ f, MYMethod(SYSOPEN), G_SCALAR,
	236	*args, imodesv, permsv, Nullsv);
	237	}
	238	else {
	239	result =
	240	PerlIOVia_method(aTHX_ f, MYMethod(OPEN), G_SCALAR,
	241	*args, Nullsv);
d9dac8cd	242	}
d9dac8cd	243	}
fc040538 NIS	244	if (result) {
	245	if (sv_isobject(result))
	246	s->obj = SvREFCNT_inc(result);
	247	else if (!SvTRUE(result)) {
	248	return NULL;
	249	}
	250	}
	251	else {
	252	/* Required open method not present */
	253	PerlIO_funcs *tab = NULL;
d26d6e72	254	IV m = n - 1;
fc040538 NIS	255	while (m >= 0) {
	256	PerlIO_funcs *t =
	257	PerlIO_layer_fetch(aTHX_ layers, m, NULL);
	258	if (t && t->Open) {
	259	tab = t;
	260	break;
	261	}
d26d6e72	262	m--;
fc040538 NIS	263	}
	264	if (tab) {
	265	if ((*tab->Open) (aTHX_ tab, layers, m, mode, fd, imode,
	266	perm, PerlIONext(f), narg, args)) {
	267	PerlIO_debug("Opened with %s => %p->%p\n", tab->name,
	268	PerlIONext(f), *PerlIONext(f));
	269	if (m + 1 < n) {
	270	/*
	271	* More layers above the one that we used to open -
	272	* apply them now
	273	*/
	274	if (PerlIO_apply_layera
	275	(aTHX_ PerlIONext(f), mode, layers, m + 1,
	276	n) != 0) {
	277	/* If pushing layers fails close the file */
	278	PerlIO_close(f);
	279	f = NULL;
	280	}
d9dac8cd	281	}
30ef3321	282	/* FIXME - Call an OPENED method here ? */
fc040538 NIS	283	return f;
	284	}
	285	else {
30ef3321 NIS	286	PerlIO_debug("Open fail %s => %p->%p\n", tab->name,
30ef3321 NIS	287	PerlIONext(f), *PerlIONext(f));
fc040538	288	/* Sub-layer open failed */
d9dac8cd	289	}
d9dac8cd NIS	290	}
d9dac8cd NIS	291	else {
30ef3321	292	PerlIO_debug("Nothing to open with");
fc040538	293	/* Nothing to do the open */
d9dac8cd	294	}
30ef3321	295	PerlIO_pop(aTHX_ f);
fc040538	296	return NULL;
d9dac8cd	297	}
d9dac8cd	298	}
fc040538	299	return f;
e7a1fdd7 NIS	300	}
	301
	302	IV
fc040538	303	PerlIOVia_popped(pTHX_ PerlIO * f)
e7a1fdd7	304	{
fc040538 NIS	305	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	306	PerlIOVia_method(aTHX_ f, MYMethod(POPPED), G_VOID, Nullsv);
	307	if (s->var) {
	308	SvREFCNT_dec(s->var);
	309	s->var = Nullsv;
	310	}
	311
	312	if (s->io) {
	313	IoIFP(s->io) = NULL;
	314	IoOFP(s->io) = NULL;
	315	}
	316	if (s->fh) {
	317	SvREFCNT_dec(s->fh);
	318	s->fh = Nullsv;
	319	s->io = NULL;
	320	}
	321	if (s->obj) {
	322	SvREFCNT_dec(s->obj);
	323	s->obj = Nullsv;
	324	}
	325	return 0;
e7a1fdd7 NIS	326	}
	327
	328	IV
fc040538	329	PerlIOVia_close(pTHX_ PerlIO * f)
e7a1fdd7	330	{
fc040538 NIS	331	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	332	IV code = PerlIOBase_close(aTHX_ f);
	333	SV *result =
	334	PerlIOVia_method(aTHX_ f, MYMethod(CLOSE), G_SCALAR, Nullsv);
	335	if (result && SvIV(result) != 0)
	336	code = SvIV(result);
	337	PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF \| PERLIO_F_WRBUF);
	338	return code;
e7a1fdd7 NIS	339	}
	340
	341	IV
fc040538	342	PerlIOVia_fileno(pTHX_ PerlIO * f)
e7a1fdd7	343	{
fc040538 NIS	344	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	345	SV *result =
	346	PerlIOVia_method(aTHX_ f, MYMethod(FILENO), G_SCALAR, Nullsv);
	347	return (result) ? SvIV(result) : PerlIO_fileno(PerlIONext(f));
e7a1fdd7 NIS	348	}
	349
	350	IV
fc040538	351	PerlIOVia_binmode(pTHX_ PerlIO * f)
86e05cf2	352	{
fc040538 NIS	353	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	354	SV *result =
	355	PerlIOVia_method(aTHX_ f, MYMethod(BINMODE), G_SCALAR, Nullsv);
	356	if (!result \|\| !SvOK(result)) {
	357	PerlIO_pop(aTHX_ f);
	358	return 0;
	359	}
	360	return SvIV(result);
86e05cf2 NIS	361	}
86e05cf2 NIS	362
6efa4722	363	IV
fc040538	364	PerlIOVia_seek(pTHX_ PerlIO * f, Off_t offset, int whence)
e7a1fdd7	365	{
fc040538	366	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
4a9d6100 GS	367	SV *offsv = sv_2mortal(sizeof(Off_t) > sizeof(IV)
4a9d6100 GS	368	? newSVnv((NV)offset) : newSViv((IV)offset));
fc040538 NIS	369	SV *whsv = sv_2mortal(newSViv(whence));
	370	SV *result =
	371	PerlIOVia_method(aTHX_ f, MYMethod(SEEK), G_SCALAR, offsv, whsv,
	372	Nullsv);
b6290011 JH	373	#if Off_t_size == 8 && defined(CONDOP_SIZE) && CONDOP_SIZE < Off_t_size
	374	if (result)
	375	return (Off_t) SvIV(result);
	376	else
	377	return (Off_t) -1;
	378	#else
fc040538	379	return (result) ? SvIV(result) : -1;
b6290011	380	#endif
e7a1fdd7 NIS	381	}
	382
	383	Off_t
fc040538	384	PerlIOVia_tell(pTHX_ PerlIO * f)
e7a1fdd7	385	{
fc040538 NIS	386	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	387	SV *result =
	388	PerlIOVia_method(aTHX_ f, MYMethod(TELL), G_SCALAR, Nullsv);
4a9d6100 GS	389	return (result)
	390	? (SvNOK(result) ? (Off_t)SvNV(result) : (Off_t)SvIV(result))
	391	: (Off_t) - 1;
e7a1fdd7 NIS	392	}
	393
	394	SSize_t
fc040538	395	PerlIOVia_unread(pTHX_ PerlIO * f, const void *vbuf, Size_t count)
e7a1fdd7	396	{
fc040538 NIS	397	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	398	SV buf = sv_2mortal(newSVpvn((char ) vbuf, count));
	399	SV *result =
	400	PerlIOVia_method(aTHX_ f, MYMethod(UNREAD), G_SCALAR, buf, Nullsv);
	401	if (result)
	402	return (SSize_t) SvIV(result);
	403	else {
	404	return PerlIOBase_unread(aTHX_ f, vbuf, count);
	405	}
e7a1fdd7 NIS	406	}
	407
	408	SSize_t
fc040538	409	PerlIOVia_read(pTHX_ PerlIO * f, void *vbuf, Size_t count)
e7a1fdd7	410	{
fc040538 NIS	411	SSize_t rd = 0;
	412	if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	413	if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS) {
	414	rd = PerlIOBase_read(aTHX_ f, vbuf, count);
	415	}
	416	else {
	417	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	418	SV *buf = sv_2mortal(newSV(count));
	419	SV *n = sv_2mortal(newSViv(count));
	420	SV *result =
	421	PerlIOVia_method(aTHX_ f, MYMethod(READ), G_SCALAR, buf, n,
	422	Nullsv);
	423	if (result) {
	424	rd = (SSize_t) SvIV(result);
	425	Move(SvPVX(buf), vbuf, rd, char);
	426	return rd;
	427	}
	428	}
e7a1fdd7	429	}
fc040538	430	return rd;
e7a1fdd7 NIS	431	}
	432
	433	SSize_t
fc040538	434	PerlIOVia_write(pTHX_ PerlIO * f, const void *vbuf, Size_t count)
e7a1fdd7	435	{
fc040538 NIS	436	if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
	437	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	438	SV buf = newSVpvn((char ) vbuf, count);
	439	SV *result =
	440	PerlIOVia_method(aTHX_ f, MYMethod(WRITE), G_SCALAR, buf,
	441	Nullsv);
	442	SvREFCNT_dec(buf);
	443	if (result)
	444	return (SSize_t) SvIV(result);
	445	return -1;
	446	}
	447	return 0;
e7a1fdd7 NIS	448	}
	449
	450	IV
fc040538	451	PerlIOVia_fill(pTHX_ PerlIO * f)
e7a1fdd7	452	{
fc040538 NIS	453	if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	454	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	455	SV *result =
	456	PerlIOVia_method(aTHX_ f, MYMethod(FILL), G_SCALAR, Nullsv);
	457	if (s->var) {
	458	SvREFCNT_dec(s->var);
	459	s->var = Nullsv;
	460	}
	461	if (result && SvOK(result)) {
	462	STRLEN len = 0;
7248df0a	463	const char *p = SvPV(result, len);
fc040538 NIS	464	s->var = newSVpvn(p, len);
	465	s->cnt = SvCUR(s->var);
	466	return 0;
	467	}
	468	else
	469	PerlIOBase(f)->flags \|= PERLIO_F_EOF;
e7a1fdd7	470	}
fc040538	471	return -1;
e7a1fdd7 NIS	472	}
	473
	474	IV
fc040538	475	PerlIOVia_flush(pTHX_ PerlIO * f)
e7a1fdd7	476	{
fc040538 NIS	477	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	478	SV *result =
	479	PerlIOVia_method(aTHX_ f, MYMethod(FLUSH), G_SCALAR, Nullsv);
	480	if (s->var && s->cnt > 0) {
	481	SvREFCNT_dec(s->var);
	482	s->var = Nullsv;
	483	}
	484	return (result) ? SvIV(result) : 0;
e7a1fdd7 NIS	485	}
	486
	487	STDCHAR *
fc040538	488	PerlIOVia_get_base(pTHX_ PerlIO * f)
e7a1fdd7	489	{
fc040538 NIS	490	if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	491	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	492	if (s->var) {
	493	return (STDCHAR *) SvPVX(s->var);
	494	}
e7a1fdd7	495	}
9849c14c	496	return (STDCHAR *) NULL;
e7a1fdd7 NIS	497	}
	498
	499	STDCHAR *
fc040538	500	PerlIOVia_get_ptr(pTHX_ PerlIO * f)
e7a1fdd7	501	{
fc040538 NIS	502	if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	503	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	504	if (s->var) {
	505	STDCHAR p = (STDCHAR ) (SvEND(s->var) - s->cnt);
	506	return p;
	507	}
e7a1fdd7	508	}
9849c14c	509	return (STDCHAR *) NULL;
e7a1fdd7 NIS	510	}
	511
	512	SSize_t
fc040538	513	PerlIOVia_get_cnt(pTHX_ PerlIO * f)
e7a1fdd7	514	{
fc040538 NIS	515	if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	516	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	517	if (s->var) {
	518	return s->cnt;
	519	}
e7a1fdd7	520	}
fc040538	521	return 0;
e7a1fdd7 NIS	522	}
	523
	524	Size_t
fc040538	525	PerlIOVia_bufsiz(pTHX_ PerlIO * f)
e7a1fdd7	526	{
fc040538 NIS	527	if (PerlIOBase(f)->flags & PERLIO_F_CANREAD) {
	528	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	529	if (s->var)
	530	return SvCUR(s->var);
	531	}
	532	return 0;
e7a1fdd7 NIS	533	}
	534
	535	void
fc040538	536	PerlIOVia_set_ptrcnt(pTHX_ PerlIO * f, STDCHAR * ptr, SSize_t cnt)
e7a1fdd7	537	{
fc040538 NIS	538	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
fc040538 NIS	539	s->cnt = cnt;
e7a1fdd7 NIS	540	}
	541
	542	void
fc040538	543	PerlIOVia_setlinebuf(pTHX_ PerlIO * f)
e7a1fdd7	544	{
fc040538 NIS	545	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	546	PerlIOVia_method(aTHX_ f, MYMethod(SETLINEBUF), G_VOID, Nullsv);
	547	PerlIOBase_setlinebuf(aTHX_ f);
e7a1fdd7 NIS	548	}
	549
	550	void
fc040538	551	PerlIOVia_clearerr(pTHX_ PerlIO * f)
e7a1fdd7	552	{
fc040538 NIS	553	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	554	PerlIOVia_method(aTHX_ f, MYMethod(CLEARERR), G_VOID, Nullsv);
	555	PerlIOBase_clearerr(aTHX_ f);
e7a1fdd7 NIS	556	}
e7a1fdd7 NIS	557
c7997937	558	IV
fc040538	559	PerlIOVia_error(pTHX_ PerlIO * f)
e7a1fdd7	560	{
fc040538 NIS	561	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	562	SV *result =
	563	PerlIOVia_method(aTHX_ f, "ERROR", &s->mERROR, G_SCALAR, Nullsv);
	564	return (result) ? SvIV(result) : PerlIOBase_error(aTHX_ f);
e7a1fdd7 NIS	565	}
	566
	567	IV
fc040538	568	PerlIOVia_eof(pTHX_ PerlIO * f)
e7a1fdd7	569	{
fc040538 NIS	570	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
	571	SV *result =
	572	PerlIOVia_method(aTHX_ f, "EOF", &s->mEOF, G_SCALAR, Nullsv);
	573	return (result) ? SvIV(result) : PerlIOBase_eof(aTHX_ f);
e7a1fdd7 NIS	574	}
e7a1fdd7 NIS	575
ecdeb87c	576	SV *
fc040538	577	PerlIOVia_getarg(pTHX_ PerlIO * f, CLONE_PARAMS * param, int flags)
ecdeb87c	578	{
fc040538 NIS	579	PerlIOVia *s = PerlIOSelf(f, PerlIOVia);
fc040538 NIS	580	return PerlIOVia_method(aTHX_ f, MYMethod(GETARG), G_SCALAR, Nullsv);
ecdeb87c NIS	581	}
ecdeb87c NIS	582
8cf8f3d1	583	PerlIO *
fc040538 NIS	584	PerlIOVia_dup(pTHX_ PerlIO * f, PerlIO * o, CLONE_PARAMS * param,
fc040538 NIS	585	int flags)
8cf8f3d1	586	{
fc040538 NIS	587	if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
	588	/* Most of the fields will lazily set themselves up as needed
	589	stash and obj have been set up by the implied push
	590	*/
	591	}
	592	return f;
8cf8f3d1 NIS	593	}
8cf8f3d1 NIS	594
fc040538 NIS	595
fc040538 NIS	596
27da23d5	597	PERLIO_FUNCS_DECL(PerlIO_object) = {
2dc2558e	598	sizeof(PerlIO_funcs),
e934609f	599	"via",
e7a1fdd7 NIS	600	sizeof(PerlIOVia),
	601	PERLIO_K_BUFFERED\|PERLIO_K_DESTRUCT,
	602	PerlIOVia_pushed,
	603	PerlIOVia_popped,
d9dac8cd	604	PerlIOVia_open, /* NULL, */
86e05cf2	605	PerlIOVia_binmode, /* NULL, */
e7a1fdd7 NIS	606	PerlIOVia_getarg,
e7a1fdd7 NIS	607	PerlIOVia_fileno,
8cf8f3d1	608	PerlIOVia_dup,
e7a1fdd7 NIS	609	PerlIOVia_read,
	610	PerlIOVia_unread,
	611	PerlIOVia_write,
	612	PerlIOVia_seek,
	613	PerlIOVia_tell,
	614	PerlIOVia_close,
	615	PerlIOVia_flush,
	616	PerlIOVia_fill,
	617	PerlIOVia_eof,
	618	PerlIOVia_error,
	619	PerlIOVia_clearerr,
	620	PerlIOVia_setlinebuf,
	621	PerlIOVia_get_base,
	622	PerlIOVia_bufsiz,
	623	PerlIOVia_get_ptr,
	624	PerlIOVia_get_cnt,
	625	PerlIOVia_set_ptrcnt,
	626	};
	627
	628
	629	#endif /* Layers available */
	630
e934609f	631	MODULE = PerlIO::via PACKAGE = PerlIO::via
e7a1fdd7 NIS	632	PROTOTYPES: ENABLE;
	633
	634	BOOT:
	635	{
	636	#ifdef PERLIO_LAYERS
27da23d5	637	PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_object));
e7a1fdd7 NIS	638	#endif
	639	}
	640
fc040538	641
30ef3321 NIS	642
	643
	644