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#define ST(off) stack_base[ax + (off)]
#ifdef CAN_PROTOTYPE
#define XS(name) void name(CV* cv)
#else
#define XS(name) void name(cv) CV* cv;
#endif
#define dXSARGS \
dSP; dMARK; \
I32 ax = mark - stack_base + 1; \
I32 items = sp - mark
#define XSANY CvXSUBANY(cv)
#define dXSI32 I32 ix = XSANY.any_i32
#define XSRETURN(off) stack_sp = stack_base + ax + ((off) - 1); return
/* Simple macros to put new mortal values onto the stack. */
/* Typically used to return values from XS functions. */
#define XST_mIV(i,v) (ST(i) = sv_2mortal(newSViv(v)) )
#define XST_mNV(i,v) (ST(i) = sv_2mortal(newSVnv(v)) )
#define XST_mPV(i,v) (ST(i) = sv_2mortal(newSVpv(v,0)))
#define XST_mNO(i) (ST(i) = &sv_no )
#define XST_mYES(i) (ST(i) = &sv_yes )
#define XST_mUNDEF(i) (ST(i) = &sv_undef)
#define XSRETURN_IV(v) STMT_START { XST_mIV(0,v); XSRETURN(1); } STMT_END
#define XSRETURN_NV(v) STMT_START { XST_mNV(0,v); XSRETURN(1); } STMT_END
#define XSRETURN_PV(v) STMT_START { XST_mPV(0,v); XSRETURN(1); } STMT_END
#define XSRETURN_NO STMT_START { XST_mNO(0); XSRETURN(1); } STMT_END
#define XSRETURN_YES STMT_START { XST_mYES(0); XSRETURN(1); } STMT_END
#define XSRETURN_UNDEF STMT_START { XST_mUNDEF(0); XSRETURN(1); } STMT_END
#define XSRETURN_EMPTY STMT_START { XSRETURN(0); } STMT_END
#define newXSproto(a,b,c,d) sv_setpv((SV*)newXS(a,b,c), d)
#ifdef XS_VERSION
# define XS_VERSION_BOOTCHECK \
STMT_START { \
char vn[255], *module = SvPV(ST(0),na); \
if (items >= 2) /* version supplied as bootstrap arg */ \
Sv=ST(1); \
else { /* read version from module::VERSION */ \
sprintf(vn,"%s::VERSION", module); \
Sv = perl_get_sv(vn, FALSE); /* XXX GV_ADDWARN */ \
} \
if (Sv && (!SvOK(Sv) || strNE(XS_VERSION, SvPV(Sv,na))) ) \
croak("%s object version %s does not match %s.pm $VERSION %s", \
module,XS_VERSION, module,(Sv && SvOK(Sv))?SvPV(Sv,na):"(undef)");\
} STMT_END
#else
# define XS_VERSION_BOOTCHECK
#endif
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