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/* pp.h
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
* 2002, 2003, 2004, 2005, 2006, 2007, 2008 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.
*
*/

#define PP(s) OP * Perl_##s(pTHX)

/*
=head1 Stack Manipulation Macros

=for apidoc AmU||SP
Stack pointer. This is usually handled by C<xsubpp>. See C<dSP> and
C<SPAGAIN>.

=for apidoc AmU||MARK
Stack marker variable for the XSUB. See C<dMARK>.

=for apidoc Am|void|PUSHMARK|SP
Opening bracket for arguments on a callback. See C<PUTBACK> and
L<perlcall>.

=for apidoc Ams||dSP
Declares a local copy of perl's stack pointer for the XSUB, available via
the C<SP> macro. See C<SP>.

=for apidoc ms||djSP

Declare Just C<SP>. This is actually identical to C<dSP>, and declares
a local copy of perl's stack pointer, available via the C<SP> macro.
See C<SP>. (Available for backward source code compatibility with the
old (Perl 5.005) thread model.)

=for apidoc Ams||dMARK
Declare a stack marker variable, C<mark>, for the XSUB. See C<MARK> and
C<dORIGMARK>.

=for apidoc Ams||dORIGMARK
Saves the original stack mark for the XSUB. See C<ORIGMARK>.

=for apidoc AmU||ORIGMARK
The original stack mark for the XSUB. See C<dORIGMARK>.

=for apidoc Ams||SPAGAIN
Refetch the stack pointer. Used after a callback. See L<perlcall>.

=cut */

#undef SP /* Solaris 2.7 i386 has this in /usr/include/sys/reg.h */
#define SP sp
#define MARK mark
#define TARG targ

#define PUSHMARK(p) \
STMT_START { \
if (++PL_markstack_ptr == PL_markstack_max) \
markstack_grow(); \
*PL_markstack_ptr = (I32)((p) - PL_stack_base);\
} STMT_END

#define TOPMARK (*PL_markstack_ptr)
#define POPMARK (*PL_markstack_ptr--)

#define dSP SV **sp = PL_stack_sp
#define djSP dSP
#define dMARK SV **mark = PL_stack_base + POPMARK
#define dORIGMARK const I32 origmark = (I32)(mark - PL_stack_base)
#define ORIGMARK (PL_stack_base + origmark)

#define SPAGAIN sp = PL_stack_sp
#define MSPAGAIN STMT_START { sp = PL_stack_sp; mark = ORIGMARK; } STMT_END

#define GETTARGETSTACKED targ = (PL_op->op_flags & OPf_STACKED ? POPs : PAD_SV(PL_op->op_targ))
#define dTARGETSTACKED SV * GETTARGETSTACKED

#define GETTARGET targ = PAD_SV(PL_op->op_targ)
#define dTARGET SV * GETTARGET

#define GETATARGET targ = (PL_op->op_flags & OPf_STACKED ? sp[-1] : PAD_SV(PL_op->op_targ))
#define dATARGET SV * GETATARGET

#define dTARG SV *targ

#define NORMAL PL_op->op_next
#define DIE return Perl_die

/*
=for apidoc Ams||PUTBACK
Closing bracket for XSUB arguments. This is usually handled by C<xsubpp>.
See C<PUSHMARK> and L<perlcall> for other uses.

=for apidoc Amn|SV*|POPs
Pops an SV off the stack.

=for apidoc Amn|char*|POPp
Pops a string off the stack.

=for apidoc Amn|char*|POPpx
Pops a string off the stack. Identical to POPp. There are two names for
historical reasons.

=for apidoc Amn|char*|POPpbytex
Pops a string off the stack which must consist of bytes i.e. characters < 256.

=for apidoc Amn|NV|POPn
Pops a double off the stack.

=for apidoc Amn|IV|POPi
Pops an integer off the stack.

=for apidoc Amn|long|POPl
Pops a long off the stack.

=cut
*/

#define PUTBACK PL_stack_sp = sp
#define RETURN return (PUTBACK, NORMAL)
#define RETURNOP(o) return (PUTBACK, o)
#define RETURNX(x) return (x, PUTBACK, NORMAL)

#define POPs (*sp--)
#define POPp POPpx
#define POPpx (SvPVx_nolen(POPs))
#define POPpconstx (SvPVx_nolen_const(POPs))
#define POPpbytex (SvPVbytex_nolen(POPs))
#define POPn (SvNVx(POPs))
#define POPi ((IV)SvIVx(POPs))
#define POPu ((UV)SvUVx(POPs))
#define POPl ((long)SvIVx(POPs))
#define POPul ((unsigned long)SvIVx(POPs))
#ifdef HAS_QUAD
#define POPq ((Quad_t)SvIVx(POPs))
#define POPuq ((Uquad_t)SvUVx(POPs))
#endif

#define TOPs (*sp)
#define TOPm1s (*(sp-1))
#define TOPp1s (*(sp+1))
#define TOPp TOPpx
#define TOPpx (SvPV_nolen(TOPs))
#define TOPn (SvNV(TOPs))
#define TOPi ((IV)SvIV(TOPs))
#define TOPu ((UV)SvUV(TOPs))
#define TOPl ((long)SvIV(TOPs))
#define TOPul ((unsigned long)SvUV(TOPs))
#ifdef HAS_QUAD
#define TOPq ((Quad_t)SvIV(TOPs))
#define TOPuq ((Uquad_t)SvUV(TOPs))
#endif

/* Go to some pains in the rare event that we must extend the stack. */

/*
=for apidoc Am|void|EXTEND|SP|int nitems
Used to extend the argument stack for an XSUB's return values. Once
used, guarantees that there is room for at least C<nitems> to be pushed
onto the stack.

=for apidoc Am|void|PUSHs|SV* sv
Push an SV onto the stack. The stack must have room for this element.
Does not handle 'set' magic. Does not use C<TARG>. See also C<PUSHmortal>,
C<XPUSHs> and C<XPUSHmortal>.

=for apidoc Am|void|PUSHp|char* str|STRLEN len
Push a string onto the stack. The stack must have room for this element.
The C<len> indicates the length of the string. Handles 'set' magic. Uses
C<TARG>, so C<dTARGET> or C<dXSTARG> should be called to declare it. Do not
call multiple C<TARG>-oriented macros to return lists from XSUB's - see
C<mPUSHp> instead. See also C<XPUSHp> and C<mXPUSHp>.

=for apidoc Am|void|PUSHn|NV nv
Push a double onto the stack. The stack must have room for this element.
Handles 'set' magic. Uses C<TARG>, so C<dTARGET> or C<dXSTARG> should be
called to declare it. Do not call multiple C<TARG>-oriented macros to
return lists from XSUB's - see C<mPUSHn> instead. See also C<XPUSHn> and
C<mXPUSHn>.

=for apidoc Am|void|PUSHi|IV iv
Push an integer onto the stack. The stack must have room for this element.
Handles 'set' magic. Uses C<TARG>, so C<dTARGET> or C<dXSTARG> should be
called to declare it. Do not call multiple C<TARG>-oriented macros to
return lists from XSUB's - see C<mPUSHi> instead. See also C<XPUSHi> and
C<mXPUSHi>.

=for apidoc Am|void|PUSHu|UV uv
Push an unsigned integer onto the stack. The stack must have room for this
element. Handles 'set' magic. Uses C<TARG>, so C<dTARGET> or C<dXSTARG>
should be called to declare it. Do not call multiple C<TARG>-oriented
macros to return lists from XSUB's - see C<mPUSHu> instead. See also
C<XPUSHu> and C<mXPUSHu>.

=for apidoc Am|void|XPUSHs|SV* sv
Push an SV onto the stack, extending the stack if necessary. Does not
handle 'set' magic. Does not use C<TARG>. See also C<XPUSHmortal>,
C<PUSHs> and C<PUSHmortal>.

=for apidoc Am|void|XPUSHp|char* str|STRLEN len
Push a string onto the stack, extending the stack if necessary. The C<len>
indicates the length of the string. Handles 'set' magic. Uses C<TARG>, so
C<dTARGET> or C<dXSTARG> should be called to declare it. Do not call
multiple C<TARG>-oriented macros to return lists from XSUB's - see
C<mXPUSHp> instead. See also C<PUSHp> and C<mPUSHp>.

=for apidoc Am|void|XPUSHn|NV nv
Push a double onto the stack, extending the stack if necessary. Handles
'set' magic. Uses C<TARG>, so C<dTARGET> or C<dXSTARG> should be called to
declare it. Do not call multiple C<TARG>-oriented macros to return lists
from XSUB's - see C<mXPUSHn> instead. See also C<PUSHn> and C<mPUSHn>.

=for apidoc Am|void|XPUSHi|IV iv
Push an integer onto the stack, extending the stack if necessary. Handles
'set' magic. Uses C<TARG>, so C<dTARGET> or C<dXSTARG> should be called to
declare it. Do not call multiple C<TARG>-oriented macros to return lists
from XSUB's - see C<mXPUSHi> instead. See also C<PUSHi> and C<mPUSHi>.

=for apidoc Am|void|XPUSHu|UV uv
Push an unsigned integer onto the stack, extending the stack if necessary.
Handles 'set' magic. Uses C<TARG>, so C<dTARGET> or C<dXSTARG> should be
called to declare it. Do not call multiple C<TARG>-oriented macros to
return lists from XSUB's - see C<mXPUSHu> instead. See also C<PUSHu> and
C<mPUSHu>.

=for apidoc Am|void|mPUSHs|SV* sv
Push an SV onto the stack and mortalizes the SV. The stack must have room
for this element. Does not use C<TARG>. See also C<PUSHs> and C<mXPUSHs>.

=for apidoc Am|void|PUSHmortal
Push a new mortal SV onto the stack. The stack must have room for this
element. Does not use C<TARG>. See also C<PUSHs>, C<XPUSHmortal> and C<XPUSHs>.

=for apidoc Am|void|mPUSHp|char* str|STRLEN len
Push a string onto the stack. The stack must have room for this element.
The C<len> indicates the length of the string. Does not use C<TARG>.
See also C<PUSHp>, C<mXPUSHp> and C<XPUSHp>.

=for apidoc Am|void|mPUSHn|NV nv
Push a double onto the stack. The stack must have room for this element.
Does not use C<TARG>. See also C<PUSHn>, C<mXPUSHn> and C<XPUSHn>.

=for apidoc Am|void|mPUSHi|IV iv
Push an integer onto the stack. The stack must have room for this element.
Does not use C<TARG>. See also C<PUSHi>, C<mXPUSHi> and C<XPUSHi>.

=for apidoc Am|void|mPUSHu|UV uv
Push an unsigned integer onto the stack. The stack must have room for this
element. Does not use C<TARG>. See also C<PUSHu>, C<mXPUSHu> and C<XPUSHu>.

=for apidoc Am|void|mXPUSHs|SV* sv
Push an SV onto the stack, extending the stack if necessary and mortalizes
the SV. Does not use C<TARG>. See also C<XPUSHs> and C<mPUSHs>.

=for apidoc Am|void|XPUSHmortal
Push a new mortal SV onto the stack, extending the stack if necessary.
Does not use C<TARG>. See also C<XPUSHs>, C<PUSHmortal> and C<PUSHs>.

=for apidoc Am|void|mXPUSHp|char* str|STRLEN len
Push a string onto the stack, extending the stack if necessary. The C<len>
indicates the length of the string. Does not use C<TARG>. See also C<XPUSHp>,
C<mPUSHp> and C<PUSHp>.

=for apidoc Am|void|mXPUSHn|NV nv
Push a double onto the stack, extending the stack if necessary.
Does not use C<TARG>. See also C<XPUSHn>, C<mPUSHn> and C<PUSHn>.

=for apidoc Am|void|mXPUSHi|IV iv
Push an integer onto the stack, extending the stack if necessary.
Does not use C<TARG>. See also C<XPUSHi>, C<mPUSHi> and C<PUSHi>.

=for apidoc Am|void|mXPUSHu|UV uv
Push an unsigned integer onto the stack, extending the stack if necessary.
Does not use C<TARG>. See also C<XPUSHu>, C<mPUSHu> and C<PUSHu>.

=cut
*/

#define EXTEND(p,n) (void)(UNLIKELY(PL_stack_max - p < (int)(n)) && \
(sp = stack_grow(sp,p, (int) (n))))

/* Same thing, but update mark register too. */
#define MEXTEND(p,n) STMT_START {if (UNLIKELY(PL_stack_max - p < (int)(n))) {\
const int markoff = mark - PL_stack_base; \
sp = stack_grow(sp,p,(int) (n)); \
mark = PL_stack_base + markoff; \
} } STMT_END

#define PUSHs(s) (*++sp = (s))
#define PUSHTARG STMT_START { SvSETMAGIC(TARG); PUSHs(TARG); } STMT_END
#define PUSHp(p,l) STMT_START { sv_setpvn(TARG, (p), (l)); PUSHTARG; } STMT_END
#define PUSHn(n) STMT_START { sv_setnv(TARG, (NV)(n)); PUSHTARG; } STMT_END
#define PUSHi(i) STMT_START { sv_setiv(TARG, (IV)(i)); PUSHTARG; } STMT_END
#define PUSHu(u) STMT_START { sv_setuv(TARG, (UV)(u)); PUSHTARG; } STMT_END

#define XPUSHs(s) (EXTEND(sp,1), *++sp = (s))
#define XPUSHTARG STMT_START { SvSETMAGIC(TARG); XPUSHs(TARG); } STMT_END
#define XPUSHp(p,l) STMT_START { sv_setpvn(TARG, (p), (l)); XPUSHTARG; } STMT_END
#define XPUSHn(n) STMT_START { sv_setnv(TARG, (NV)(n)); XPUSHTARG; } STMT_END
#define XPUSHi(i) STMT_START { sv_setiv(TARG, (IV)(i)); XPUSHTARG; } STMT_END
#define XPUSHu(u) STMT_START { sv_setuv(TARG, (UV)(u)); XPUSHTARG; } STMT_END
#define XPUSHundef STMT_START { SvOK_off(TARG); XPUSHs(TARG); } STMT_END

#define mPUSHs(s) PUSHs(sv_2mortal(s))
#define PUSHmortal PUSHs(sv_newmortal())
#define mPUSHp(p,l) PUSHs(newSVpvn_flags((p), (l), SVs_TEMP))
#define mPUSHn(n) sv_setnv(PUSHmortal, (NV)(n))
#define mPUSHi(i) sv_setiv(PUSHmortal, (IV)(i))
#define mPUSHu(u) sv_setuv(PUSHmortal, (UV)(u))

#define mXPUSHs(s) XPUSHs(sv_2mortal(s))
#define XPUSHmortal XPUSHs(sv_newmortal())
#define mXPUSHp(p,l) STMT_START { EXTEND(sp,1); mPUSHp((p), (l)); } STMT_END
#define mXPUSHn(n) STMT_START { EXTEND(sp,1); sv_setnv(PUSHmortal, (NV)(n)); } STMT_END
#define mXPUSHi(i) STMT_START { EXTEND(sp,1); sv_setiv(PUSHmortal, (IV)(i)); } STMT_END
#define mXPUSHu(u) STMT_START { EXTEND(sp,1); sv_setuv(PUSHmortal, (UV)(u)); } STMT_END

#define SETs(s) (*sp = s)
#define SETTARG STMT_START { SvSETMAGIC(TARG); SETs(TARG); } STMT_END
#define SETp(p,l) STMT_START { sv_setpvn(TARG, (p), (l)); SETTARG; } STMT_END
#define SETn(n) STMT_START { sv_setnv(TARG, (NV)(n)); SETTARG; } STMT_END
#define SETi(i) STMT_START { sv_setiv(TARG, (IV)(i)); SETTARG; } STMT_END
#define SETu(u) STMT_START { sv_setuv(TARG, (UV)(u)); SETTARG; } STMT_END

#define dTOPss SV *sv = TOPs
#define dPOPss SV *sv = POPs
#define dTOPnv NV value = TOPn
#define dPOPnv NV value = POPn
#define dPOPnv_nomg NV value = (sp--, SvNV_nomg(TOPp1s))
#define dTOPiv IV value = TOPi
#define dPOPiv IV value = POPi
#define dTOPuv UV value = TOPu
#define dPOPuv UV value = POPu
#ifdef HAS_QUAD
#define dTOPqv Quad_t value = TOPu
#define dPOPqv Quad_t value = POPu
#define dTOPuqv Uquad_t value = TOPuq
#define dPOPuqv Uquad_t value = POPuq
#endif

#define dPOPXssrl(X) SV *right = POPs; SV *left = CAT2(X,s)
#define dPOPXnnrl(X) NV right = POPn; NV left = CAT2(X,n)
#define dPOPXiirl(X) IV right = POPi; IV left = CAT2(X,i)

#define USE_LEFT(sv) \
(SvOK(sv) || !(PL_op->op_flags & OPf_STACKED))
#define dPOPXiirl_ul_nomg(X) \
IV right = (sp--, SvIV_nomg(TOPp1s)); \
SV *leftsv = CAT2(X,s); \
IV left = USE_LEFT(leftsv) ? SvIV_nomg(leftsv) : 0

#define dPOPPOPssrl dPOPXssrl(POP)
#define dPOPPOPnnrl dPOPXnnrl(POP)
#define dPOPPOPiirl dPOPXiirl(POP)

#define dPOPTOPssrl dPOPXssrl(TOP)
#define dPOPTOPnnrl dPOPXnnrl(TOP)
#define dPOPTOPnnrl_nomg \
NV right = SvNV_nomg(TOPs); NV left = (sp--, SvNV_nomg(TOPs))
#define dPOPTOPiirl dPOPXiirl(TOP)
#define dPOPTOPiirl_ul_nomg dPOPXiirl_ul_nomg(TOP)
#define dPOPTOPiirl_nomg \
IV right = SvIV_nomg(TOPs); IV left = (sp--, SvIV_nomg(TOPs))

#define RETPUSHYES RETURNX(PUSHs(&PL_sv_yes))
#define RETPUSHNO RETURNX(PUSHs(&PL_sv_no))
#define RETPUSHUNDEF RETURNX(PUSHs(&PL_sv_undef))

#define RETSETYES RETURNX(SETs(&PL_sv_yes))
#define RETSETNO RETURNX(SETs(&PL_sv_no))
#define RETSETUNDEF RETURNX(SETs(&PL_sv_undef))

#define ARGTARG PL_op->op_targ

    /* See OPpTARGET_MY: */
#define MAXARG (PL_op->op_private & 15)

#define SWITCHSTACK(f,t) \
STMT_START { \
AvFILLp(f) = sp - PL_stack_base; \
PL_stack_base = AvARRAY(t); \
PL_stack_max = PL_stack_base + AvMAX(t); \
sp = PL_stack_sp = PL_stack_base + AvFILLp(t); \
PL_curstack = t; \
} STMT_END

#define EXTEND_MORTAL(n) \
STMT_START { \
if (UNLIKELY(PL_tmps_ix + (n) >= PL_tmps_max)) \
tmps_grow(n); \
} STMT_END

#define AMGf_noright 1
#define AMGf_noleft 2
#define AMGf_assign 4
#define AMGf_unary 8
#define AMGf_numeric 0x10 /* for Perl_try_amagic_bin */
#define AMGf_set 0x20 /* for Perl_try_amagic_bin */
#define AMGf_want_list 0x40


/* do SvGETMAGIC on the stack args before checking for overload */

#define tryAMAGICun_MG(method, flags) STMT_START { \
if ( (SvFLAGS(TOPs) & (SVf_ROK|SVs_GMG)) \
&& Perl_try_amagic_un(aTHX_ method, flags)) \
return NORMAL; \
} STMT_END
#define tryAMAGICbin_MG(method, flags) STMT_START { \
if ( ((SvFLAGS(TOPm1s)|SvFLAGS(TOPs)) & (SVf_ROK|SVs_GMG)) \
&& Perl_try_amagic_bin(aTHX_ method, flags)) \
return NORMAL; \
} STMT_END

#define AMG_CALLunary(sv,meth) \
amagic_call(sv,&PL_sv_undef, meth, AMGf_noright | AMGf_unary)

/* No longer used in core. Use AMG_CALLunary instead */
#define AMG_CALLun(sv,meth) AMG_CALLunary(sv, CAT2(meth,_amg))

#define tryAMAGICunTARGETlist(meth, jump) \
STMT_START { \
dSP; \
SV *tmpsv; \
SV *arg= *sp; \
int gimme = GIMME_V; \
if (SvAMAGIC(arg) && \
(tmpsv = amagic_call(arg, &PL_sv_undef, meth, \
AMGf_want_list | AMGf_noright \
|AMGf_unary))) { \
SPAGAIN; \
if (gimme == G_VOID) { \
(void)POPs; /* XXX ??? */ \
} \
else if (gimme == G_ARRAY) { \
int i; \
I32 len; \
assert(SvTYPE(tmpsv) == SVt_PVAV); \
len = av_len((AV *)tmpsv) + 1; \
(void)POPs; /* get rid of the arg */ \
EXTEND(sp, len); \
for (i = 0; i < len; ++i) \
PUSHs(av_shift((AV *)tmpsv)); \
} \
else { /* AMGf_want_scalar */ \
dATARGET; /* just use the arg's location */ \
sv_setsv(TARG, tmpsv); \
if (opASSIGN) \
sp--; \
SETTARG; \
} \
PUTBACK; \
if (jump) { \
OP *jump_o = NORMAL->op_next; \
while (jump_o->op_type == OP_NULL) \
jump_o = jump_o->op_next; \
assert(jump_o->op_type == OP_ENTERSUB); \
PL_markstack_ptr--; \
return jump_o->op_next; \
} \
return NORMAL; \
} \
} STMT_END

/* This is no longer used anywhere in the core. You might wish to consider
calling amagic_deref_call() directly, as it has a cleaner interface. */
#define tryAMAGICunDEREF(meth) \
STMT_START { \
sv = amagic_deref_call(*sp, CAT2(meth,_amg)); \
SPAGAIN; \
} STMT_END


#define opASSIGN (PL_op->op_flags & OPf_STACKED)
#define SETsv(sv) STMT_START { \
if (opASSIGN || (SvFLAGS(TARG) & SVs_PADMY)) \
{ sv_setsv(TARG, (sv)); SETTARG; } \
else SETs(sv); } STMT_END

#define SETsvUN(sv) STMT_START { \
if (SvFLAGS(TARG) & SVs_PADMY) \
{ sv_setsv(TARG, (sv)); SETTARG; } \
else SETs(sv); } STMT_END

/*
=for apidoc mU||LVRET
True if this op will be the return value of an lvalue subroutine

=cut */
#define LVRET ((PL_op->op_private & OPpMAYBE_LVSUB) && is_lvalue_sub())

#define SvCANEXISTDELETE(sv) \
(!SvRMAGICAL(sv) \
|| !(mg = mg_find((const SV *) sv, PERL_MAGIC_tied)) \
|| ( (stash = SvSTASH(SvRV(SvTIED_obj(MUTABLE_SV(sv), mg)))) \
&& gv_fetchmethod_autoload(stash, "EXISTS", TRUE) \
&& gv_fetchmethod_autoload(stash, "DELETE", TRUE) \
) \
)

#ifdef PERL_CORE

/* These are just for Perl_tied_method(), which is not part of the public API.
Use 0x04 rather than the next available bit, to help the compiler if the
architecture can generate more efficient instructions. */
# define TIED_METHOD_MORTALIZE_NOT_NEEDED 0x04
# define TIED_METHOD_ARGUMENTS_ON_STACK 0x08
# define TIED_METHOD_SAY 0x10

/* Used in various places that need to dereference a glob or globref */
# define MAYBE_DEREF_GV_flags(sv,phlags) \
( \
(void)(phlags & SV_GMAGIC && (SvGETMAGIC(sv),0)), \
isGV_with_GP(sv) \
? (GV *)(sv) \
: SvROK(sv) && SvTYPE(SvRV(sv)) <= SVt_PVLV && \
(SvGETMAGIC(SvRV(sv)), isGV_with_GP(SvRV(sv))) \
? (GV *)SvRV(sv) \
: NULL \
)
# define MAYBE_DEREF_GV(sv) MAYBE_DEREF_GV_flags(sv,SV_GMAGIC)
# define MAYBE_DEREF_GV_nomg(sv) MAYBE_DEREF_GV_flags(sv,0)

# define FIND_RUNCV_padid_eq 1
# define FIND_RUNCV_level_eq 2

#endif

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