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freebsd/contrib/perl5/pp.h
Mark Murray 120a02d4f3 Vendor import of Perl 5.006
2000-06-25 11:04:01 +00:00

373 lines
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/* pp.h
*
* Copyright (c) 1991-2000, Larry Wall
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
#ifdef USE_THREADS
#define ARGS thr
#define dARGS struct perl_thread *thr;
#else
#define ARGS
#define dARGS
#endif /* USE_THREADS */
#define PP(s) OP * Perl_##s(pTHX)
/*
=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 Ams||PUSHMARK
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 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
*/
#define SP sp
#define MARK mark
#define TARG targ
#define PUSHMARK(p) if (++PL_markstack_ptr == PL_markstack_max) \
markstack_grow(); \
*PL_markstack_ptr = (p) - PL_stack_base
#define TOPMARK (*PL_markstack_ptr)
#define POPMARK (*PL_markstack_ptr--)
#define djSP register SV **sp = PL_stack_sp
#define dSP dTHR; djSP
#define dMARK register SV **mark = PL_stack_base + POPMARK
#define dORIGMARK I32 origmark = mark - PL_stack_base
#define SETORIGMARK origmark = mark - PL_stack_base
#define ORIGMARK (PL_stack_base + origmark)
#define SPAGAIN sp = PL_stack_sp
#define MSPAGAIN sp = PL_stack_sp; mark = ORIGMARK
#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|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 (SvPVx(POPs, PL_na)) /* deprecated */
#define POPpx (SvPVx(POPs, n_a))
#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 TOPp (SvPV(TOPs, PL_na)) /* deprecated */
#define TOPpx (SvPV(TOPs, n_a))
#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, guarrantees 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. See C<XPUSHs>.
=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. See
C<XPUSHp>.
=for apidoc Am|void|PUSHn|NV nv
Push a double onto the stack. The stack must have room for this element.
Handles 'set' magic. See C<XPUSHn>.
=for apidoc Am|void|PUSHi|IV iv
Push an integer onto the stack. The stack must have room for this element.
Handles 'set' magic. See C<XPUSHi>.
=for apidoc Am|void|PUSHu|UV uv
Push an unsigned integer onto the stack. The stack must have room for this
element. See C<XPUSHu>.
=for apidoc Am|void|XPUSHs|SV* sv
Push an SV onto the stack, extending the stack if necessary. Does not
handle 'set' magic. See C<PUSHs>.
=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. See
C<PUSHp>.
=for apidoc Am|void|XPUSHn|NV nv
Push a double onto the stack, extending the stack if necessary. Handles
'set' magic. See C<PUSHn>.
=for apidoc Am|void|XPUSHi|IV iv
Push an integer onto the stack, extending the stack if necessary. Handles
'set' magic. See C<PUSHi>.
=for apidoc Am|void|XPUSHu|UV uv
Push an unsigned integer onto the stack, extending the stack if necessary.
See C<PUSHu>.
=cut
*/
#define EXTEND(p,n) STMT_START { if (PL_stack_max - p < (n)) { \
sp = stack_grow(sp,p, (int) (n)); \
} } STMT_END
/* Same thing, but update mark register too. */
#define MEXTEND(p,n) STMT_START {if (PL_stack_max - p < (n)) { \
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) STMT_START { EXTEND(sp,1); (*++sp = (s)); } STMT_END
#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 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 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) || SvGMAGICAL(sv) || !(PL_op->op_flags & OPf_STACKED))
#define dPOPXnnrl_ul(X) \
NV right = POPn; \
SV *leftsv = CAT2(X,s); \
NV left = USE_LEFT(leftsv) ? SvNV(leftsv) : 0.0
#define dPOPXiirl_ul(X) \
IV right = POPi; \
SV *leftsv = CAT2(X,s); \
IV left = USE_LEFT(leftsv) ? SvIV(leftsv) : 0
#define dPOPPOPssrl dPOPXssrl(POP)
#define dPOPPOPnnrl dPOPXnnrl(POP)
#define dPOPPOPnnrl_ul dPOPXnnrl_ul(POP)
#define dPOPPOPiirl dPOPXiirl(POP)
#define dPOPPOPiirl_ul dPOPXiirl_ul(POP)
#define dPOPTOPssrl dPOPXssrl(TOP)
#define dPOPTOPnnrl dPOPXnnrl(TOP)
#define dPOPTOPnnrl_ul dPOPXnnrl_ul(TOP)
#define dPOPTOPiirl dPOPXiirl(TOP)
#define dPOPTOPiirl_ul dPOPXiirl_ul(TOP)
#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 (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 tryAMAGICbinW(meth,assign,set) STMT_START { \
if (PL_amagic_generation) { \
SV* tmpsv; \
SV* right= *(sp); SV* left= *(sp-1);\
if ((SvAMAGIC(left)||SvAMAGIC(right))&&\
(tmpsv=amagic_call(left, \
right, \
CAT2(meth,_amg), \
(assign)? AMGf_assign: 0))) {\
SPAGAIN; \
(void)POPs; set(tmpsv); RETURN; } \
} \
} STMT_END
#define tryAMAGICbin(meth,assign) tryAMAGICbinW(meth,assign,SETsv)
#define tryAMAGICbinSET(meth,assign) tryAMAGICbinW(meth,assign,SETs)
#define AMG_CALLun(sv,meth) amagic_call(sv,&PL_sv_undef, \
CAT2(meth,_amg),AMGf_noright | AMGf_unary)
#define AMG_CALLbinL(left,right,meth) \
amagic_call(left,right,CAT2(meth,_amg),AMGf_noright)
#define tryAMAGICunW(meth,set,shift,ret) STMT_START { \
if (PL_amagic_generation) { \
SV* tmpsv; \
SV* arg= sp[shift]; \
am_again: \
if ((SvAMAGIC(arg))&&\
(tmpsv=AMG_CALLun(arg,meth))) {\
SPAGAIN; if (shift) sp += shift; \
set(tmpsv); ret; } \
} \
} STMT_END
#define FORCE_SETs(sv) STMT_START { sv_setsv(TARG, (sv)); SETTARG; } STMT_END
#define tryAMAGICun(meth) tryAMAGICunW(meth,SETsvUN,0,RETURN)
#define tryAMAGICunSET(meth) tryAMAGICunW(meth,SETs,0,RETURN)
#define tryAMAGICunTARGET(meth, shift) \
{ dSP; sp--; /* get TARGET from below PL_stack_sp */ \
{ dTARGETSTACKED; \
{ dSP; tryAMAGICunW(meth,FORCE_SETs,shift,RETURN);}}}
#define setAGAIN(ref) sv = arg = ref; \
if (!SvROK(ref)) \
Perl_croak(aTHX_ "Overloaded dereference did not return a reference"); \
goto am_again;
#define tryAMAGICunDEREF(meth) tryAMAGICunW(meth,setAGAIN,0,(void)0)
#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
/* newSVsv does not behave as advertised, so we copy missing
* information by hand */
/* SV* ref causes confusion with the member variable
changed SV* ref to SV* tmpRef */
#define RvDEEPCP(rv) STMT_START { SV* tmpRef=SvRV(rv); \
if (SvREFCNT(tmpRef)>1) { \
SvREFCNT_dec(tmpRef); \
SvRV(rv)=AMG_CALLun(rv,copy); \
} } STMT_END
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