/* $RCSfile: gv.h,v $$Revision: 4.1 $$Date: 92/08/07 18:26:42 $
 *
 *    Copyright (c) 1991, 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.
 *
 * $Log:	gv.h,v $
 * Revision 4.1  92/08/07  18:26:42  lwall
 * 
 * Revision 4.0.1.3  92/06/08  15:33:44  lwall
 * patch20: fixed confusion between a *var's real name and its effective name
 * patch20: ($<,$>) = ... didn't work on some architectures
 * 
 * Revision 4.0.1.2  91/11/05  18:36:15  lwall
 * patch11: length($x) was sometimes wrong for numeric $x
 * 
 * Revision 4.0.1.1  91/06/07  11:56:35  lwall
 * patch4: new copyright notice
 * patch4: length($`), length($&), length($') now optimized to avoid string copy
 * 
 * Revision 4.0  91/03/20  01:39:49  lwall
 * 4.0 baseline.
 * 
 */

struct gp {
    SV *	gp_sv;		/* scalar value */
    U32		gp_refcnt;	/* how many globs point to this? */
    struct io *	gp_io;		/* filehandle value */
    CV *	gp_form;	/* format value */
    AV *	gp_av;		/* array value */
    HV *	gp_hv;		/* associative array value */
    GV *	gp_egv;		/* effective gv, if *glob */
    CV *	gp_cv;		/* subroutine value */
    U32		gp_cvgen;	/* generational validity of cached gv_cv */
    I32		gp_lastexpr;	/* used by nothing_in_common() */
    line_t	gp_line;	/* line first declared at (for -w) */
    char	gp_flags;
};

#if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286))
#define MICROPORT
#endif

#define GvXPVGV(gv)	((XPVGV*)SvANY(gv))

#define GvMAGIC(gv)	(GvGP(gv)->gp_magic)
#define GvSV(gv)	(GvGP(gv)->gp_sv)
#define GvREFCNT(gv)	(GvGP(gv)->gp_refcnt)
#define GvIO(gv)	(GvGP(gv)->gp_io)
#define GvIOn(gv)	(GvIO(gv) ?			\
			 GvIO(gv) :			\
			 (GvIO(gv) = newIO()))

#define GvFORM(gv)	(GvGP(gv)->gp_form)
#define GvAV(gv)	(GvGP(gv)->gp_av)

#ifdef	MICROPORT	/* Microport 2.4 hack */
AV *GvAVn();
#else
#define GvAVn(gv)	(GvGP(gv)->gp_av ? \
			 GvGP(gv)->gp_av : \
			 GvGP(gv_AVadd(gv))->gp_av)
#endif
#define GvHV(gv)	((GvGP(gv))->gp_hv)

#ifdef	MICROPORT	/* Microport 2.4 hack */
HV *GvHVn();
#else
#define GvHVn(gv)	(GvGP(gv)->gp_hv ? \
			 GvGP(gv)->gp_hv : \
			 GvGP(gv_HVadd(gv))->gp_hv)
#endif			/* Microport 2.4 hack */

#define GvCV(gv)	(GvGP(gv)->gp_cv)
#define GvCVGEN(gv)	(GvGP(gv)->gp_cvgen)

#define GvLASTEXPR(gv)	(GvGP(gv)->gp_lastexpr)

#define GvLINE(gv)	(GvGP(gv)->gp_line)

#define GvFLAGS(gv)	(GvGP(gv)->gp_flags)

#define GvEGV(gv)	(GvGP(gv)->gp_egv)

#define GvGP(gv)	(GvXPVGV(gv)->xgv_gp)
#define GvNAME(gv)	(GvXPVGV(gv)->xgv_name)
#define GvNAMELEN(gv)	(GvXPVGV(gv)->xgv_namelen)
#define GvENAME(gv)	GvNAME(GvEGV(gv))

#define GvSTASH(gv)	(GvXPVGV(gv)->xgv_stash)
#define GvESTASH(gv)	GvSTASH(GvEGV(gv))

struct io {
    FILE *	ifp;		/* ifp and ofp are normally the same */
    FILE *	ofp;		/* but sockets need separate streams */
#ifdef HAS_READDIR
    DIR *	dirp;		/* for opendir, readdir, etc */
#endif
    long	lines;		/* $. */
    long	page;		/* $% */
    long	page_len;	/* $= */
    long	lines_left;	/* $- */
    char *	top_name;	/* $^ */
    GV *	top_gv;		/* $^ */
    char *	fmt_name;	/* $~ */
    GV *	fmt_gv;		/* $~ */
    SV *	object;
    short	subprocess;	/* -| or |- */
    char	type;
    char	flags;
};

#define IOf_ARGV 1	/* this fp iterates over ARGV */
#define IOf_START 2	/* check for null ARGV and substitute '-' */
#define IOf_FLUSH 4	/* this fp wants a flush after write op */

#define Nullgv Null(GV*)

#define DM_UID   0x003
#define DM_RUID   0x001
#define DM_EUID   0x002
#define DM_GID   0x030
#define DM_RGID   0x010
#define DM_EGID   0x020
#define DM_DELAY 0x100