/*    mathoms.c
 *
 *    Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010,
 *    2011, 2012 by Larry Wall and others
 *
 *    You may distribute under the terms of either the GNU General Public
 *    License or the Artistic License, as specified in the README file.
 *
 */

/*
 *  Anything that Hobbits had no immediate use for, but were unwilling to
 *  throw away, they called a mathom.  Their dwellings were apt to become
 *  rather crowded with mathoms, and many of the presents that passed from
 *  hand to hand were of that sort.
 *
 *     [p.5 of _The Lord of the Rings_: "Prologue"]
 */



/* 
 * This file contains mathoms, various binary artifacts from previous
 * versions of Perl.  For binary or source compatibility reasons, though,
 * we cannot completely remove them from the core code.  
 *
 * SMP - Oct. 24, 2005
 *
 * The compilation of this file can be suppressed; see INSTALL
 *
 */

#include "EXTERN.h"
#define PERL_IN_MATHOMS_C
#include "perl.h"

#ifdef NO_MATHOMS
/* ..." warning: ISO C forbids an empty source file"
   So make sure we have something in here by processing the headers anyway.
 */
#else

/* Not all of these have prototypes elsewhere, so do this to get
 * non-mangled names.
 */
START_EXTERN_C

PERL_CALLCONV OP * Perl_ref(pTHX_ OP *o, I32 type);
PERL_CALLCONV void Perl_sv_unref(pTHX_ SV *sv);
PERL_CALLCONV void Perl_sv_taint(pTHX_ SV *sv);
PERL_CALLCONV IV Perl_sv_2iv(pTHX_ SV *sv);
PERL_CALLCONV UV Perl_sv_2uv(pTHX_ SV *sv);
PERL_CALLCONV NV Perl_sv_2nv(pTHX_ SV *sv);
PERL_CALLCONV char * Perl_sv_2pv(pTHX_ SV *sv, STRLEN *lp);
PERL_CALLCONV char * Perl_sv_2pv_nolen(pTHX_ SV *sv);
PERL_CALLCONV char * Perl_sv_2pvbyte_nolen(pTHX_ SV *sv);
PERL_CALLCONV char * Perl_sv_2pvutf8_nolen(pTHX_ SV *sv);
PERL_CALLCONV void Perl_sv_force_normal(pTHX_ SV *sv);
PERL_CALLCONV void Perl_sv_setsv(pTHX_ SV *dstr, SV *sstr);
PERL_CALLCONV void Perl_sv_catpvn(pTHX_ SV *dsv, const char* sstr, STRLEN slen);
PERL_CALLCONV void Perl_sv_catpvn_mg(pTHX_ SV *sv, const char *ptr, STRLEN len);
PERL_CALLCONV void Perl_sv_catsv(pTHX_ SV *dstr, SV *sstr);
PERL_CALLCONV void Perl_sv_catsv_mg(pTHX_ SV *dsv, SV *ssv);
PERL_CALLCONV char * Perl_sv_pv(pTHX_ SV *sv);
PERL_CALLCONV char * Perl_sv_pvn_force(pTHX_ SV *sv, STRLEN *lp);
PERL_CALLCONV char * Perl_sv_pvbyte(pTHX_ SV *sv);
PERL_CALLCONV char * Perl_sv_pvutf8(pTHX_ SV *sv);
PERL_CALLCONV STRLEN Perl_sv_utf8_upgrade(pTHX_ SV *sv);
PERL_CALLCONV NV Perl_huge(void);
PERL_CALLCONV void Perl_gv_fullname3(pTHX_ SV *sv, const GV *gv, const char *prefix);
PERL_CALLCONV void Perl_gv_efullname3(pTHX_ SV *sv, const GV *gv, const char *prefix);
PERL_CALLCONV GV * Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name);
PERL_CALLCONV HE * Perl_hv_iternext(pTHX_ HV *hv);
PERL_CALLCONV void Perl_hv_magic(pTHX_ HV *hv, GV *gv, int how);
PERL_CALLCONV bool Perl_do_open(pTHX_ GV *gv, const char *name, I32 len, int as_raw, int rawmode, int rawperm, PerlIO *supplied_fp);
PERL_CALLCONV bool Perl_do_aexec(pTHX_ SV *really, SV **mark, SV **sp);
PERL_CALLCONV U8 * Perl_uvuni_to_utf8(pTHX_ U8 *d, UV uv);
PERL_CALLCONV bool Perl_is_utf8_string_loc(pTHX_ const U8 *s, STRLEN len, const U8 **ep);
PERL_CALLCONV void Perl_sv_nolocking(pTHX_ SV *sv);
PERL_CALLCONV void Perl_sv_usepvn_mg(pTHX_ SV *sv, char *ptr, STRLEN len);
PERL_CALLCONV void Perl_sv_usepvn(pTHX_ SV *sv, char *ptr, STRLEN len);
PERL_CALLCONV int Perl_fprintf_nocontext(PerlIO *stream, const char *format, ...);
PERL_CALLCONV int Perl_printf_nocontext(const char *format, ...);
PERL_CALLCONV int Perl_magic_setglob(pTHX_ SV* sv, MAGIC* mg);
PERL_CALLCONV AV * Perl_newAV(pTHX);
PERL_CALLCONV HV * Perl_newHV(pTHX);
PERL_CALLCONV IO * Perl_newIO(pTHX);
PERL_CALLCONV I32 Perl_my_stat(pTHX);
PERL_CALLCONV I32 Perl_my_lstat(pTHX);
PERL_CALLCONV I32 Perl_sv_eq(pTHX_ SV *sv1, SV *sv2);
PERL_CALLCONV char * Perl_sv_collxfrm(pTHX_ SV *const sv, STRLEN *const nxp);
PERL_CALLCONV bool Perl_sv_2bool(pTHX_ SV *const sv);
PERL_CALLCONV CV * Perl_newSUB(pTHX_ I32 floor, OP* o, OP* proto, OP* block);
PERL_CALLCONV UV Perl_to_utf8_lower(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp);
PERL_CALLCONV UV Perl_to_utf8_title(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp);
PERL_CALLCONV UV Perl_to_utf8_upper(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp);
PERL_CALLCONV UV Perl_to_utf8_fold(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp);
PERL_CALLCONV SV *Perl_sv_mortalcopy(pTHX_ SV *const oldstr);

/* ref() is now a macro using Perl_doref;
 * this version provided for binary compatibility only.
 */
OP *
Perl_ref(pTHX_ OP *o, I32 type)
{
    return doref(o, type, TRUE);
}

/*
=for apidoc sv_unref

Unsets the RV status of the SV, and decrements the reference count of
whatever was being referenced by the RV.  This can almost be thought of
as a reversal of C<newSVrv>.  This is C<sv_unref_flags> with the C<flag>
being zero.  See C<SvROK_off>.

=cut
*/

void
Perl_sv_unref(pTHX_ SV *sv)
{
    PERL_ARGS_ASSERT_SV_UNREF;

    sv_unref_flags(sv, 0);
}

/*
=for apidoc sv_taint

Taint an SV. Use C<SvTAINTED_on> instead.

=cut
*/

void
Perl_sv_taint(pTHX_ SV *sv)
{
    PERL_ARGS_ASSERT_SV_TAINT;

    sv_magic((sv), NULL, PERL_MAGIC_taint, NULL, 0);
}

/* sv_2iv() is now a macro using Perl_sv_2iv_flags();
 * this function provided for binary compatibility only
 */

IV
Perl_sv_2iv(pTHX_ SV *sv)
{
    return sv_2iv_flags(sv, SV_GMAGIC);
}

/* sv_2uv() is now a macro using Perl_sv_2uv_flags();
 * this function provided for binary compatibility only
 */

UV
Perl_sv_2uv(pTHX_ SV *sv)
{
    return sv_2uv_flags(sv, SV_GMAGIC);
}

/* sv_2nv() is now a macro using Perl_sv_2nv_flags();
 * this function provided for binary compatibility only
 */

NV
Perl_sv_2nv(pTHX_ SV *sv)
{
    return sv_2nv_flags(sv, SV_GMAGIC);
}


/* sv_2pv() is now a macro using Perl_sv_2pv_flags();
 * this function provided for binary compatibility only
 */

char *
Perl_sv_2pv(pTHX_ SV *sv, STRLEN *lp)
{
    return sv_2pv_flags(sv, lp, SV_GMAGIC);
}

/*
=for apidoc sv_2pv_nolen

Like C<sv_2pv()>, but doesn't return the length too. You should usually
use the macro wrapper C<SvPV_nolen(sv)> instead.

=cut
*/

char *
Perl_sv_2pv_nolen(pTHX_ SV *sv)
{
    PERL_ARGS_ASSERT_SV_2PV_NOLEN;
    return sv_2pv(sv, NULL);
}

/*
=for apidoc sv_2pvbyte_nolen

Return a pointer to the byte-encoded representation of the SV.
May cause the SV to be downgraded from UTF-8 as a side-effect.

Usually accessed via the C<SvPVbyte_nolen> macro.

=cut
*/

char *
Perl_sv_2pvbyte_nolen(pTHX_ SV *sv)
{
    PERL_ARGS_ASSERT_SV_2PVBYTE_NOLEN;

    return sv_2pvbyte(sv, NULL);
}

/*
=for apidoc sv_2pvutf8_nolen

Return a pointer to the UTF-8-encoded representation of the SV.
May cause the SV to be upgraded to UTF-8 as a side-effect.

Usually accessed via the C<SvPVutf8_nolen> macro.

=cut
*/

char *
Perl_sv_2pvutf8_nolen(pTHX_ SV *sv)
{
    PERL_ARGS_ASSERT_SV_2PVUTF8_NOLEN;

    return sv_2pvutf8(sv, NULL);
}

/*
=for apidoc sv_force_normal

Undo various types of fakery on an SV: if the PV is a shared string, make
a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
an xpvmg. See also C<sv_force_normal_flags>.

=cut
*/

void
Perl_sv_force_normal(pTHX_ SV *sv)
{
    PERL_ARGS_ASSERT_SV_FORCE_NORMAL;

    sv_force_normal_flags(sv, 0);
}

/* sv_setsv() is now a macro using Perl_sv_setsv_flags();
 * this function provided for binary compatibility only
 */

void
Perl_sv_setsv(pTHX_ SV *dstr, SV *sstr)
{
    PERL_ARGS_ASSERT_SV_SETSV;

    sv_setsv_flags(dstr, sstr, SV_GMAGIC);
}

/* sv_catpvn() is now a macro using Perl_sv_catpvn_flags();
 * this function provided for binary compatibility only
 */

void
Perl_sv_catpvn(pTHX_ SV *dsv, const char* sstr, STRLEN slen)
{
    PERL_ARGS_ASSERT_SV_CATPVN;

    sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC);
}

/*
=for apidoc sv_catpvn_mg

Like C<sv_catpvn>, but also handles 'set' magic.

=cut
*/

void
Perl_sv_catpvn_mg(pTHX_ SV *sv, const char *ptr, STRLEN len)
{
    PERL_ARGS_ASSERT_SV_CATPVN_MG;

    sv_catpvn_flags(sv,ptr,len,SV_GMAGIC|SV_SMAGIC);
}

/* sv_catsv() is now a macro using Perl_sv_catsv_flags();
 * this function provided for binary compatibility only
 */

void
Perl_sv_catsv(pTHX_ SV *dstr, SV *sstr)
{
    PERL_ARGS_ASSERT_SV_CATSV;

    sv_catsv_flags(dstr, sstr, SV_GMAGIC);
}

/*
=for apidoc sv_catsv_mg

Like C<sv_catsv>, but also handles 'set' magic.

=cut
*/

void
Perl_sv_catsv_mg(pTHX_ SV *dsv, SV *ssv)
{
    PERL_ARGS_ASSERT_SV_CATSV_MG;

    sv_catsv_flags(dsv,ssv,SV_GMAGIC|SV_SMAGIC);
}

/*
=for apidoc sv_iv

A private implementation of the C<SvIVx> macro for compilers which can't
cope with complex macro expressions. Always use the macro instead.

=cut
*/

IV
Perl_sv_iv(pTHX_ SV *sv)
{
    PERL_ARGS_ASSERT_SV_IV;

    if (SvIOK(sv)) {
	if (SvIsUV(sv))
	    return (IV)SvUVX(sv);
	return SvIVX(sv);
    }
    return sv_2iv(sv);
}

/*
=for apidoc sv_uv

A private implementation of the C<SvUVx> macro for compilers which can't
cope with complex macro expressions. Always use the macro instead.

=cut
*/

UV
Perl_sv_uv(pTHX_ SV *sv)
{
    PERL_ARGS_ASSERT_SV_UV;

    if (SvIOK(sv)) {
	if (SvIsUV(sv))
	    return SvUVX(sv);
	return (UV)SvIVX(sv);
    }
    return sv_2uv(sv);
}

/*
=for apidoc sv_nv

A private implementation of the C<SvNVx> macro for compilers which can't
cope with complex macro expressions. Always use the macro instead.

=cut
*/

NV
Perl_sv_nv(pTHX_ SV *sv)
{
    PERL_ARGS_ASSERT_SV_NV;

    if (SvNOK(sv))
	return SvNVX(sv);
    return sv_2nv(sv);
}

/*
=for apidoc sv_pv

Use the C<SvPV_nolen> macro instead

=for apidoc sv_pvn

A private implementation of the C<SvPV> macro for compilers which can't
cope with complex macro expressions. Always use the macro instead.

=cut
*/

char *
Perl_sv_pvn(pTHX_ SV *sv, STRLEN *lp)
{
    PERL_ARGS_ASSERT_SV_PVN;

    if (SvPOK(sv)) {
	*lp = SvCUR(sv);
	return SvPVX(sv);
    }
    return sv_2pv(sv, lp);
}


char *
Perl_sv_pvn_nomg(pTHX_ SV *sv, STRLEN *lp)
{
    PERL_ARGS_ASSERT_SV_PVN_NOMG;

    if (SvPOK(sv)) {
	*lp = SvCUR(sv);
	return SvPVX(sv);
    }
    return sv_2pv_flags(sv, lp, 0);
}

/* sv_pv() is now a macro using SvPV_nolen();
 * this function provided for binary compatibility only
 */

char *
Perl_sv_pv(pTHX_ SV *sv)
{
    PERL_ARGS_ASSERT_SV_PV;

    if (SvPOK(sv))
        return SvPVX(sv);

    return sv_2pv(sv, NULL);
}

/* sv_pvn_force() is now a macro using Perl_sv_pvn_force_flags();
 * this function provided for binary compatibility only
 */

char *
Perl_sv_pvn_force(pTHX_ SV *sv, STRLEN *lp)
{
    PERL_ARGS_ASSERT_SV_PVN_FORCE;

    return sv_pvn_force_flags(sv, lp, SV_GMAGIC);
}

/* sv_pvbyte () is now a macro using Perl_sv_2pv_flags();
 * this function provided for binary compatibility only
 */

char *
Perl_sv_pvbyte(pTHX_ SV *sv)
{
    PERL_ARGS_ASSERT_SV_PVBYTE;

    sv_utf8_downgrade(sv, FALSE);
    return sv_pv(sv);
}

/*
=for apidoc sv_pvbyte

Use C<SvPVbyte_nolen> instead.

=for apidoc sv_pvbyten

A private implementation of the C<SvPVbyte> macro for compilers
which can't cope with complex macro expressions. Always use the macro
instead.

=cut
*/

char *
Perl_sv_pvbyten(pTHX_ SV *sv, STRLEN *lp)
{
    PERL_ARGS_ASSERT_SV_PVBYTEN;

    sv_utf8_downgrade(sv, FALSE);
    return sv_pvn(sv,lp);
}

/* sv_pvutf8 () is now a macro using Perl_sv_2pv_flags();
 * this function provided for binary compatibility only
 */

char *
Perl_sv_pvutf8(pTHX_ SV *sv)
{
    PERL_ARGS_ASSERT_SV_PVUTF8;

    sv_utf8_upgrade(sv);
    return sv_pv(sv);
}

/*
=for apidoc sv_pvutf8

Use the C<SvPVutf8_nolen> macro instead

=for apidoc sv_pvutf8n

A private implementation of the C<SvPVutf8> macro for compilers
which can't cope with complex macro expressions. Always use the macro
instead.

=cut
*/

char *
Perl_sv_pvutf8n(pTHX_ SV *sv, STRLEN *lp)
{
    PERL_ARGS_ASSERT_SV_PVUTF8N;

    sv_utf8_upgrade(sv);
    return sv_pvn(sv,lp);
}

/* sv_utf8_upgrade() is now a macro using sv_utf8_upgrade_flags();
 * this function provided for binary compatibility only
 */

STRLEN
Perl_sv_utf8_upgrade(pTHX_ SV *sv)
{
    PERL_ARGS_ASSERT_SV_UTF8_UPGRADE;

    return sv_utf8_upgrade_flags(sv, SV_GMAGIC);
}

int
Perl_fprintf_nocontext(PerlIO *stream, const char *format, ...)
{
    dTHXs;
    va_list(arglist);

    /* Easier to special case this here than in embed.pl. (Look at what it
       generates for proto.h) */
#ifdef PERL_IMPLICIT_CONTEXT
    PERL_ARGS_ASSERT_FPRINTF_NOCONTEXT;
#endif

    va_start(arglist, format);
    return PerlIO_vprintf(stream, format, arglist);
}

int
Perl_printf_nocontext(const char *format, ...)
{
    dTHX;
    va_list(arglist);

#ifdef PERL_IMPLICIT_CONTEXT
    PERL_ARGS_ASSERT_PRINTF_NOCONTEXT;
#endif

    va_start(arglist, format);
    return PerlIO_vprintf(PerlIO_stdout(), format, arglist);
}

#if defined(HUGE_VAL) || (defined(USE_LONG_DOUBLE) && defined(HUGE_VALL))
/*
 * This hack is to force load of "huge" support from libm.a
 * So it is in perl for (say) POSIX to use.
 * Needed for SunOS with Sun's 'acc' for example.
 */
NV
Perl_huge(void)
{
#  if defined(USE_LONG_DOUBLE) && defined(HUGE_VALL)
    return HUGE_VALL;
#  else
    return HUGE_VAL;
#  endif
}
#endif

/* compatibility with versions <= 5.003. */
void
Perl_gv_fullname(pTHX_ SV *sv, const GV *gv)
{
    PERL_ARGS_ASSERT_GV_FULLNAME;

    gv_fullname3(sv, gv, sv == (const SV*)gv ? "*" : "");
}

/* compatibility with versions <= 5.003. */
void
Perl_gv_efullname(pTHX_ SV *sv, const GV *gv)
{
    PERL_ARGS_ASSERT_GV_EFULLNAME;

    gv_efullname3(sv, gv, sv == (const SV*)gv ? "*" : "");
}

void
Perl_gv_fullname3(pTHX_ SV *sv, const GV *gv, const char *prefix)
{
    PERL_ARGS_ASSERT_GV_FULLNAME3;

    gv_fullname4(sv, gv, prefix, TRUE);
}

void
Perl_gv_efullname3(pTHX_ SV *sv, const GV *gv, const char *prefix)
{
    PERL_ARGS_ASSERT_GV_EFULLNAME3;

    gv_efullname4(sv, gv, prefix, TRUE);
}

/*
=for apidoc gv_fetchmethod

See L</gv_fetchmethod_autoload>.

=cut
*/

GV *
Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name)
{
    PERL_ARGS_ASSERT_GV_FETCHMETHOD;

    return gv_fetchmethod_autoload(stash, name, TRUE);
}

HE *
Perl_hv_iternext(pTHX_ HV *hv)
{
    PERL_ARGS_ASSERT_HV_ITERNEXT;

    return hv_iternext_flags(hv, 0);
}

void
Perl_hv_magic(pTHX_ HV *hv, GV *gv, int how)
{
    PERL_ARGS_ASSERT_HV_MAGIC;

    sv_magic(MUTABLE_SV(hv), MUTABLE_SV(gv), how, NULL, 0);
}

bool
Perl_do_open(pTHX_ GV *gv, const char *name, I32 len, int as_raw,
	     int rawmode, int rawperm, PerlIO *supplied_fp)
{
    PERL_ARGS_ASSERT_DO_OPEN;

    return do_openn(gv, name, len, as_raw, rawmode, rawperm,
		    supplied_fp, (SV **) NULL, 0);
}

bool
Perl_do_open9(pTHX_ GV *gv, const char *name, I32 len, int
as_raw,
              int rawmode, int rawperm, PerlIO *supplied_fp, SV *svs,
              I32 num_svs)
{
    PERL_ARGS_ASSERT_DO_OPEN9;

    PERL_UNUSED_ARG(num_svs);
    return do_openn(gv, name, len, as_raw, rawmode, rawperm,
                    supplied_fp, &svs, 1);
}

int
Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int mode)
{
 /* The old body of this is now in non-LAYER part of perlio.c
  * This is a stub for any XS code which might have been calling it.
  */
 const char *name = ":raw";

 PERL_ARGS_ASSERT_DO_BINMODE;

#ifdef PERLIO_USING_CRLF
 if (!(mode & O_BINARY))
     name = ":crlf";
#endif
 return PerlIO_binmode(aTHX_ fp, iotype, mode, name);
}

#ifndef OS2
bool
Perl_do_aexec(pTHX_ SV *really, SV **mark, SV **sp)
{
    PERL_ARGS_ASSERT_DO_AEXEC;

    return do_aexec5(really, mark, sp, 0, 0);
}
#endif

/* Backwards compatibility. */
int
Perl_init_i18nl14n(pTHX_ int printwarn)
{
    return init_i18nl10n(printwarn);
}

U8 *
Perl_uvuni_to_utf8(pTHX_ U8 *d, UV uv)
{
    PERL_ARGS_ASSERT_UVUNI_TO_UTF8;

    return Perl_uvoffuni_to_utf8_flags(aTHX_ d, uv, 0);
}

bool
Perl_is_utf8_string_loc(pTHX_ const U8 *s, STRLEN len, const U8 **ep)
{
    PERL_ARGS_ASSERT_IS_UTF8_STRING_LOC;

    return is_utf8_string_loclen(s, len, ep, 0);
}

/*
=for apidoc sv_nolocking

Dummy routine which "locks" an SV when there is no locking module present.
Exists to avoid test for a NULL function pointer and because it could
potentially warn under some level of strict-ness.

"Superseded" by sv_nosharing().

=cut
*/

void
Perl_sv_nolocking(pTHX_ SV *sv)
{
    PERL_UNUSED_CONTEXT;
    PERL_UNUSED_ARG(sv);
}


/*
=for apidoc sv_nounlocking

Dummy routine which "unlocks" an SV when there is no locking module present.
Exists to avoid test for a NULL function pointer and because it could
potentially warn under some level of strict-ness.

"Superseded" by sv_nosharing().

=cut
*/

void
Perl_sv_nounlocking(pTHX_ SV *sv)
{
    PERL_UNUSED_CONTEXT;
    PERL_UNUSED_ARG(sv);
}

void
Perl_save_long(pTHX_ long int *longp)
{
    dVAR;

    PERL_ARGS_ASSERT_SAVE_LONG;

    SSCHECK(3);
    SSPUSHLONG(*longp);
    SSPUSHPTR(longp);
    SSPUSHUV(SAVEt_LONG);
}

void
Perl_save_iv(pTHX_ IV *ivp)
{
    dVAR;

    PERL_ARGS_ASSERT_SAVE_IV;

    SSCHECK(3);
    SSPUSHIV(*ivp);
    SSPUSHPTR(ivp);
    SSPUSHUV(SAVEt_IV);
}

void
Perl_save_nogv(pTHX_ GV *gv)
{
    dVAR;

    PERL_ARGS_ASSERT_SAVE_NOGV;

    SSCHECK(2);
    SSPUSHPTR(gv);
    SSPUSHUV(SAVEt_NSTAB);
}

void
Perl_save_list(pTHX_ SV **sarg, I32 maxsarg)
{
    dVAR;
    I32 i;

    PERL_ARGS_ASSERT_SAVE_LIST;

    for (i = 1; i <= maxsarg; i++) {
	SV *sv;
	SvGETMAGIC(sarg[i]);
	sv = newSV(0);
	sv_setsv_nomg(sv,sarg[i]);
	SSCHECK(3);
	SSPUSHPTR(sarg[i]);		/* remember the pointer */
	SSPUSHPTR(sv);			/* remember the value */
	SSPUSHUV(SAVEt_ITEM);
    }
}

/*
=for apidoc sv_usepvn_mg

Like C<sv_usepvn>, but also handles 'set' magic.

=cut
*/

void
Perl_sv_usepvn_mg(pTHX_ SV *sv, char *ptr, STRLEN len)
{
    PERL_ARGS_ASSERT_SV_USEPVN_MG;

    sv_usepvn_flags(sv,ptr,len, SV_SMAGIC);
}

/*
=for apidoc sv_usepvn

Tells an SV to use C<ptr> to find its string value. Implemented by
calling C<sv_usepvn_flags> with C<flags> of 0, hence does not handle 'set'
magic. See C<sv_usepvn_flags>.

=cut
*/

void
Perl_sv_usepvn(pTHX_ SV *sv, char *ptr, STRLEN len)
{
    PERL_ARGS_ASSERT_SV_USEPVN;

    sv_usepvn_flags(sv,ptr,len, 0);
}

/*
=for apidoc unpack_str

The engine implementing unpack() Perl function. Note: parameters strbeg, new_s
and ocnt are not used. This call should not be used, use unpackstring instead.

=cut */

I32
Perl_unpack_str(pTHX_ const char *pat, const char *patend, const char *s,
		const char *strbeg, const char *strend, char **new_s, I32 ocnt,
		U32 flags)
{
    PERL_ARGS_ASSERT_UNPACK_STR;

    PERL_UNUSED_ARG(strbeg);
    PERL_UNUSED_ARG(new_s);
    PERL_UNUSED_ARG(ocnt);

    return unpackstring(pat, patend, s, strend, flags);
}

/*
=for apidoc pack_cat

The engine implementing pack() Perl function. Note: parameters next_in_list and
flags are not used. This call should not be used; use packlist instead.

=cut
*/

void
Perl_pack_cat(pTHX_ SV *cat, const char *pat, const char *patend, SV **beglist, SV **endlist, SV ***next_in_list, U32 flags)
{
    PERL_ARGS_ASSERT_PACK_CAT;

    PERL_UNUSED_ARG(next_in_list);
    PERL_UNUSED_ARG(flags);

    packlist(cat, pat, patend, beglist, endlist);
}

HE *
Perl_hv_store_ent(pTHX_ HV *hv, SV *keysv, SV *val, U32 hash)
{
  return (HE *)hv_common(hv, keysv, NULL, 0, 0, HV_FETCH_ISSTORE, val, hash);
}

bool
Perl_hv_exists_ent(pTHX_ HV *hv, SV *keysv, U32 hash)
{
    PERL_ARGS_ASSERT_HV_EXISTS_ENT;

    return hv_common(hv, keysv, NULL, 0, 0, HV_FETCH_ISEXISTS, 0, hash)
	? TRUE : FALSE;
}

HE *
Perl_hv_fetch_ent(pTHX_ HV *hv, SV *keysv, I32 lval, U32 hash)
{
    PERL_ARGS_ASSERT_HV_FETCH_ENT;

    return (HE *)hv_common(hv, keysv, NULL, 0, 0, 
		     (lval ? HV_FETCH_LVALUE : 0), NULL, hash);
}

SV *
Perl_hv_delete_ent(pTHX_ HV *hv, SV *keysv, I32 flags, U32 hash)
{
    PERL_ARGS_ASSERT_HV_DELETE_ENT;

    return MUTABLE_SV(hv_common(hv, keysv, NULL, 0, 0, flags | HV_DELETE, NULL,
				hash));
}

SV**
Perl_hv_store_flags(pTHX_ HV *hv, const char *key, I32 klen, SV *val, U32 hash,
		    int flags)
{
    return (SV**) hv_common(hv, NULL, key, klen, flags,
			    (HV_FETCH_ISSTORE|HV_FETCH_JUST_SV), val, hash);
}

SV**
Perl_hv_store(pTHX_ HV *hv, const char *key, I32 klen_i32, SV *val, U32 hash)
{
    STRLEN klen;
    int flags;

    if (klen_i32 < 0) {
	klen = -klen_i32;
	flags = HVhek_UTF8;
    } else {
	klen = klen_i32;
	flags = 0;
    }
    return (SV **) hv_common(hv, NULL, key, klen, flags,
			     (HV_FETCH_ISSTORE|HV_FETCH_JUST_SV), val, hash);
}

bool
Perl_hv_exists(pTHX_ HV *hv, const char *key, I32 klen_i32)
{
    STRLEN klen;
    int flags;

    PERL_ARGS_ASSERT_HV_EXISTS;

    if (klen_i32 < 0) {
	klen = -klen_i32;
	flags = HVhek_UTF8;
    } else {
	klen = klen_i32;
	flags = 0;
    }
    return hv_common(hv, NULL, key, klen, flags, HV_FETCH_ISEXISTS, 0, 0)
	? TRUE : FALSE;
}

SV**
Perl_hv_fetch(pTHX_ HV *hv, const char *key, I32 klen_i32, I32 lval)
{
    STRLEN klen;
    int flags;

    PERL_ARGS_ASSERT_HV_FETCH;

    if (klen_i32 < 0) {
	klen = -klen_i32;
	flags = HVhek_UTF8;
    } else {
	klen = klen_i32;
	flags = 0;
    }
    return (SV **) hv_common(hv, NULL, key, klen, flags,
			     lval ? (HV_FETCH_JUST_SV | HV_FETCH_LVALUE)
			     : HV_FETCH_JUST_SV, NULL, 0);
}

SV *
Perl_hv_delete(pTHX_ HV *hv, const char *key, I32 klen_i32, I32 flags)
{
    STRLEN klen;
    int k_flags;

    PERL_ARGS_ASSERT_HV_DELETE;

    if (klen_i32 < 0) {
	klen = -klen_i32;
	k_flags = HVhek_UTF8;
    } else {
	klen = klen_i32;
	k_flags = 0;
    }
    return MUTABLE_SV(hv_common(hv, NULL, key, klen, k_flags, flags | HV_DELETE,
				NULL, 0));
}

/* Functions after here were made mathoms post 5.10.0 but pre 5.8.9 */

AV *
Perl_newAV(pTHX)
{
    return MUTABLE_AV(newSV_type(SVt_PVAV));
    /* sv_upgrade does AvREAL_only():
    AvALLOC(av) = 0;
    AvARRAY(av) = NULL;
    AvMAX(av) = AvFILLp(av) = -1; */
}

HV *
Perl_newHV(pTHX)
{
    HV * const hv = MUTABLE_HV(newSV_type(SVt_PVHV));
    assert(!SvOK(hv));

    return hv;
}

void
Perl_sv_insert(pTHX_ SV *const bigstr, const STRLEN offset, const STRLEN len, 
              const char *const little, const STRLEN littlelen)
{
    PERL_ARGS_ASSERT_SV_INSERT;
    sv_insert_flags(bigstr, offset, len, little, littlelen, SV_GMAGIC);
}

void
Perl_save_freesv(pTHX_ SV *sv)
{
    dVAR;
    save_freesv(sv);
}

void
Perl_save_mortalizesv(pTHX_ SV *sv)
{
    dVAR;

    PERL_ARGS_ASSERT_SAVE_MORTALIZESV;

    save_mortalizesv(sv);
}

void
Perl_save_freeop(pTHX_ OP *o)
{
    dVAR;
    save_freeop(o);
}

void
Perl_save_freepv(pTHX_ char *pv)
{
    dVAR;
    save_freepv(pv);
}

void
Perl_save_op(pTHX)
{
    dVAR;
    save_op();
}

#ifdef PERL_DONT_CREATE_GVSV
GV *
Perl_gv_SVadd(pTHX_ GV *gv)
{
    return gv_SVadd(gv);
}
#endif

GV *
Perl_gv_AVadd(pTHX_ GV *gv)
{
    return gv_AVadd(gv);
}

GV *
Perl_gv_HVadd(pTHX_ GV *gv)
{
    return gv_HVadd(gv);
}

GV *
Perl_gv_IOadd(pTHX_ GV *gv)
{
    return gv_IOadd(gv);
}

IO *
Perl_newIO(pTHX)
{
    return MUTABLE_IO(newSV_type(SVt_PVIO));
}

I32
Perl_my_stat(pTHX)
{
    return my_stat_flags(SV_GMAGIC);
}

I32
Perl_my_lstat(pTHX)
{
    return my_lstat_flags(SV_GMAGIC);
}

I32
Perl_sv_eq(pTHX_ SV *sv1, SV *sv2)
{
    return sv_eq_flags(sv1, sv2, SV_GMAGIC);
}

#ifdef USE_LOCALE_COLLATE
char *
Perl_sv_collxfrm(pTHX_ SV *const sv, STRLEN *const nxp)
{
    return sv_collxfrm_flags(sv, nxp, SV_GMAGIC);
}
#endif

bool
Perl_sv_2bool(pTHX_ SV *const sv)
{
    return sv_2bool_flags(sv, SV_GMAGIC);
}


/*
=for apidoc custom_op_name
Return the name for a given custom op. This was once used by the OP_NAME
macro, but is no longer: it has only been kept for compatibility, and
should not be used.

=for apidoc custom_op_desc
Return the description of a given custom op. This was once used by the
OP_DESC macro, but is no longer: it has only been kept for
compatibility, and should not be used.

=cut
*/

const char*
Perl_custom_op_name(pTHX_ const OP* o)
{
    PERL_ARGS_ASSERT_CUSTOM_OP_NAME;
    return XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_name);
}

const char*
Perl_custom_op_desc(pTHX_ const OP* o)
{
    PERL_ARGS_ASSERT_CUSTOM_OP_DESC;
    return XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_desc);
}

CV *
Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
{
    return Perl_newATTRSUB(aTHX_ floor, o, proto, NULL, block);
}

UV
Perl_to_utf8_fold(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp)
{
    PERL_ARGS_ASSERT_TO_UTF8_FOLD;

    return _to_utf8_fold_flags(p, ustrp, lenp, FOLD_FLAGS_FULL, NULL);
}

UV
Perl_to_utf8_lower(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp)
{
    PERL_ARGS_ASSERT_TO_UTF8_LOWER;

    return _to_utf8_lower_flags(p, ustrp, lenp, FALSE, NULL);
}

UV
Perl_to_utf8_title(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp)
{
    PERL_ARGS_ASSERT_TO_UTF8_TITLE;

    return _to_utf8_title_flags(p, ustrp, lenp, FALSE, NULL);
}

UV
Perl_to_utf8_upper(pTHX_ const U8 *p, U8* ustrp, STRLEN *lenp)
{
    PERL_ARGS_ASSERT_TO_UTF8_UPPER;

    return _to_utf8_upper_flags(p, ustrp, lenp, FALSE, NULL);
}

SV *
Perl_sv_mortalcopy(pTHX_ SV *const oldstr)
{
    return Perl_sv_mortalcopy_flags(aTHX_ oldstr, SV_GMAGIC);
}

UV      /* Made into a function, so can be deprecated */
NATIVE_TO_NEED(const UV enc, const UV ch)
{
    PERL_UNUSED_ARG(enc);
    return ch;
}

UV      /* Made into a function, so can be deprecated */
ASCII_TO_NEED(const UV enc, const UV ch)
{
    PERL_UNUSED_ARG(enc);
    return ch;
}

/*
=for apidoc uvuni_to_utf8_flags

Instead you almost certainly want to use L</uvchr_to_utf8> or
L</uvchr_to_utf8_flags>>.

This function is a deprecated synonym for L</uvoffuni_to_utf8_flags>,
which itself, while not deprecated, should be used only in isolated
circumstances.  These functions were useful for code that wanted to handle
both EBCDIC and ASCII platforms with Unicode properties, but starting in Perl
v5.20, the distinctions between the platforms have mostly been made invisible
to most code, so this function is quite unlikely to be what you want.

=cut
*/

U8 *
Perl_uvuni_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags)
{
    PERL_ARGS_ASSERT_UVUNI_TO_UTF8_FLAGS;

    return uvoffuni_to_utf8_flags(d, uv, flags);
}

/*
=for apidoc utf8n_to_uvuni

Instead use L</utf8_to_uvchr_buf>, or rarely, L</utf8n_to_uvchr>.

This function was usefulfor code that wanted to handle both EBCDIC and
ASCII platforms with Unicode properties, but starting in Perl v5.20, the
distinctions between the platforms have mostly been made invisible to most
code, so this function is quite unlikely to be what you want.
C<L<NATIVE_TO_UNI(utf8_to_uvchr_buf(...))|/utf8_to_uvchr_buf>> instead.

=cut
*/

UV
Perl_utf8n_to_uvuni(pTHX_ const U8 *s, STRLEN curlen, STRLEN *retlen, U32 flags)
{
    PERL_ARGS_ASSERT_UTF8N_TO_UVUNI;

    return utf8n_to_uvoffuni(s, curlen, retlen, flags);
}

END_EXTERN_C

#endif /* NO_MATHOMS */

/*
 * Local variables:
 * c-indentation-style: bsd
 * c-basic-offset: 4
 * indent-tabs-mode: nil
 * End:
 *
 * ex: set ts=8 sts=4 sw=4 et:
 */