/* pp.h
*
- * Copyright (c) 1991-1999, Larry Wall
+ * Copyright (c) 1991-2001, 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.
#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 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 TOPMARK (*PL_markstack_ptr)
#define POPMARK (*PL_markstack_ptr--)
-#define djSP register SV **sp = PL_stack_sp
-#define dSP dTHR; djSP
+#define dSP register SV **sp = PL_stack_sp
+#define djSP dSP
#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 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. Deprecated. New code should provide
+a STRLEN n_a and use POPpx.
+
+=for apidoc Amn|char*|POPpx
+Pops a string off the stack.
+Requires a variable STRLEN n_a in scope.
+
+=for apidoc Amn|char*|POPpbytex
+Pops a string off the stack which must consist of bytes i.e. characters < 256.
+Requires a variable STRLEN n_a in scope.
+
+=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 POPs (*sp--)
#define POPp (SvPVx(POPs, PL_na)) /* deprecated */
#define POPpx (SvPVx(POPs, n_a))
+#define POPpbytex (SvPVbytex(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 TOPm1s (*(sp-1))
+#define TOPp1s (*(sp+1))
#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, 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. 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
#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 dPOPTOPiirl dPOPXiirl(TOP)
#define dPOPTOPiirl_ul dPOPXiirl_ul(TOP)
-#define TOPIOKbin (SvIOK(TOPs) && SvIOK(*(sp-1)))
-#define tryIVIVbin(op) \
- if (TOPIOKbin) { \
- dPOPTOPiirl_ul; \
- NV result = (NV)left op (NV)right; \
- if (result >= (NV)IV_MIN && result <= (NV)IV_MAX) \
- SETi( left op right ); \
- else \
- SETn( result ); \
- RETURN; \
- }
-
#define RETPUSHYES RETURNX(PUSHs(&PL_sv_yes))
#define RETPUSHNO RETURNX(PUSHs(&PL_sv_no))
#define RETPUSHUNDEF RETURNX(PUSHs(&PL_sv_undef))
if (PL_amagic_generation) { \
SV* tmpsv; \
SV* arg= sp[shift]; \
+ if(0) goto am_again; /* shut up unused warning */ \
am_again: \
if ((SvAMAGIC(arg))&&\
(tmpsv=AMG_CALLun(arg,meth))) {\
{ dTARGETSTACKED; \
{ dSP; tryAMAGICunW(meth,FORCE_SETs,shift,RETURN);}}}
-#define setAGAIN(ref) sv = arg = ref; \
- if (!SvROK(ref)) \
+#define setAGAIN(ref) sv = ref; \
+ if (!SvROK(ref)) \
Perl_croak(aTHX_ "Overloaded dereference did not return a reference"); \
- goto am_again;
+ if (ref != arg && SvRV(ref) != SvRV(arg)) { \
+ arg = ref; \
+ goto am_again; \
+ }
#define tryAMAGICunDEREF(meth) tryAMAGICunW(meth,setAGAIN,0,(void)0)
SvREFCNT_dec(tmpRef); \
SvRV(rv)=AMG_CALLun(rv,copy); \
} } 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())
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