#ifdef CAN_PROTOTYPE
#define XSdec(x) XS(x)
#else
#define XSdec(x) void x()
#endif

#define TKXSRETURN(off)					\
    STMT_START {					\
	IV ptkAdj = (off);				\
	XSRETURN(ptkAdj);				\
    } STMT_END

#ifndef PATCHLEVEL
#include <patchlevel.h>
#endif

#if defined(PATCHLEVEL) && (PATCHLEVEL < 5)
#define PL_sv_undef	sv_undef
#define PL_tainting	tainting
#define PL_tainted	tainted
#define PL_stack_base	stack_base
#define PL_stack_sp	stack_sp
#define PL_curcop	curcop
#endif

#ifndef CopSTASH
#define CopSTASH(c)		c->cop_stash
#define CopSTASH_set(c,h)	(CopSTASH(c) = h)
#endif

#ifndef dTHX
#define dTHR int maybeTHR
#endif

#ifndef dTHXs
#ifdef PERL_IMPLICIT_SYS
#define dTHXs dTHX
#else
#define dTHR int maybeTHR
#endif
#endif

#ifndef ERRSV
#define ERRSV GvSV(errgv)
#endif

#ifndef aTHX_
#define aTHX_
#endif

#ifndef pTHX_
#define pTHX_
#endif

#ifdef dirty
#undef dirty
#endif
#ifdef bufptr
#undef bufptr
#endif
#ifdef colors
#undef colors
#endif
#ifdef JOIN
#undef JOIN
#endif

#ifdef na
#if PATCHLEVEL >= 5
#undef na
#endif
#endif


#define Tcl_Interp     HV
#define LangCallback   SV
#define Var            SV *
#define LangResultSave AV
struct Lang_CmdInfo;
#define Tcl_Command    struct Lang_CmdInfo *
struct WrappedRegExp;
#define Tcl_RegExp     struct WrappedRegExp *
#define Tcl_Obj        SV
#define Tcl_DString    SV *

#ifndef PerlIO
#define PerlIO FILE
#define PerlIO_stderr()			stderr
#define PerlIO_printf			fprintf
#define PerlIO_flush(f)			Fflush(f)
#define PerlIO_vprintf(f,fmt,a)		vfprintf(f,fmt,a)
#define PerlIO_putc(f,c)		fputc(c,f)
#define PerlIO_fileno(f)		fileno(f)

/* Now our interface to Configure's FILE_xxx macros */

#ifdef USE_STDIO_PTR
#define PerlIO_has_cntptr(f)		1
#define PerlIO_get_ptr(f)		FILE_ptr(f)
#define PerlIO_get_cnt(f)		FILE_cnt(f)

#ifdef FILE_CNT_LVALUE
#define PerlIO_canset_cnt(f)		1
#ifdef FILE_PTR_LVALUE
#define PerlIO_fast_gets(f)		1
#endif
#define PerlIO_set_cnt(f,c)		(FILE_cnt(f) = (c))
#else
#define PerlIO_canset_cnt(f)		0
#define PerlIO_set_cnt(f,c)		abort()
#endif

#ifdef FILE_PTR_LVALUE
#define PerlIO_set_ptrcnt(f,p,c)	(FILE_ptr(f) = (p), PerlIO_set_cnt(f,c))
#else
#define PerlIO_set_ptrcnt(f,p,c)	abort()
#endif

#else  /* USE_STDIO_PTR */

#define PerlIO_has_cntptr(f)		0
#define PerlIO_get_cnt(f)		(abort(),0)
#define PerlIO_get_ptr(f)		(abort(),0)
#define PerlIO_set_cnt(f,c)		abort()
#define PerlIO_set_ptrcnt(f,p,c)	abort()

#endif /* USE_STDIO_PTR */

#endif