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/* av.h
*
* Copyright (C) 1991, 1992, 1993, 1995, 1996, 1997, 1998, 1999,
* 2000, 2001, 2002, 2005, by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
struct xpvav {
IV this_space;
SSize_t xav_fill; /* Index of last element present */
SSize_t xav_max; /* max index for which array has space */
union {
NV xnvu_nv;
struct {
void *xnv_p1; /* pointer to beginning of C array of SVs */
union {
void *xnv_p2;
IV xnv_i2;
} xnv_u2;
} xnv_s;
} xnv_u;
MAGIC* xmg_magic; /* magic for scalar array */
HV* xmg_stash; /* class package */
};
#if 0
typedef struct xpvav xpvav_allocated;
#else
typedef struct {
SSize_t xav_fill; /* Index of last element present */
SSize_t xav_max; /* max index for which array has space */
union {
NV xnvu_nv;
struct {
void *xnv_p1; /* pointer to beginning of C array of SVs */
union {
void *xnv_p2;
IV xnv_i2;
} xnv_u2;
} xnv_s;
} xnv_u;
MAGIC* xmg_magic; /* magic for scalar array */
HV* xmg_stash; /* class package */
} xpvav_allocated;
#endif
/* SV** xav_alloc; */
#define xav_alloc xnv_u.xnv_s.xnv_p1
/* SV* xav_arylen; */
#define xav_arylen xnv_u.xnv_s.xnv_u2.xnv_p2
/* AVf_REAL is set for all AVs whose xav_array contents are refcounted.
* Some things like "@_" and the scratchpad list do not set this, to
* indicate that they are cheating (for efficiency) by not refcounting
* the AV's contents.
*
* AVf_REIFY is only meaningful on such "fake" AVs (i.e. where AVf_REAL
* is not set). It indicates that the fake AV is capable of becoming
* real if the array needs to be modified in some way. Functions that
* modify fake AVs check both flags to call av_reify() as appropriate.
*
* Note that the Perl stack and @DB::args have neither flag set. (Thus,
* items that go on the stack are never refcounted.)
*
* These internal details are subject to change any time. AV
* manipulations external to perl should not care about any of this.
* GSAR 1999-09-10
*/
/*
=head1 Handy Values
=for apidoc AmU||Nullav
Null AV pointer.
=head1 Array Manipulation Functions
=for apidoc Am|int|AvFILL|AV* av
Same as C<av_len()>. Deprecated, use C<av_len()> instead.
=cut
*/
#define Nullav Null(AV*)
#define AvARRAY(av) ((av)->sv_u.sv_array)
#define AvALLOC(av) (*((SV***)&((XPVAV*) SvANY(av))->xav_alloc))
#define AvMAX(av) ((XPVAV*) SvANY(av))->xav_max
#define AvFILLp(av) ((XPVAV*) SvANY(av))->xav_fill
#define AvARYLEN(av) (*((SV**)&((XPVAV*) SvANY(av))->xav_arylen))
#define AvREAL(av) (SvFLAGS(av) & SVpav_REAL)
#define AvREAL_on(av) (SvFLAGS(av) |= SVpav_REAL)
#define AvREAL_off(av) (SvFLAGS(av) &= ~SVpav_REAL)
#define AvREAL_only(av) (AvREIFY_off(av), SvFLAGS(av) |= SVpav_REAL)
#define AvREIFY(av) (SvFLAGS(av) & SVpav_REIFY)
#define AvREIFY_on(av) (SvFLAGS(av) |= SVpav_REIFY)
#define AvREIFY_off(av) (SvFLAGS(av) &= ~SVpav_REIFY)
#define AvREIFY_only(av) (AvREAL_off(av), SvFLAGS(av) |= SVpav_REIFY)
#define AvREALISH(av) (SvFLAGS(av) & (SVpav_REAL|SVpav_REIFY))
#define AvFILL(av) ((SvRMAGICAL((SV *) (av))) \
? mg_size((SV *) av) : AvFILLp(av))
#define NEGATIVE_INDICES_VAR "NEGATIVE_INDICES"
/*
* Local variables:
* c-indentation-style: bsd
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*
* ex: set ts=8 sts=4 sw=4 noet:
*/
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