3 * Copyright (C) 1991, 1992, 1993, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2005, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 NV xnv_nv; /* numeric value, if any */
13 SSize_t xav_fill; /* Index of last element present */
14 SSize_t xav_max; /* max index for which array has space */
16 IV xivu_iv; /* integer value or pv offset */
20 MAGIC* xmg_magic; /* magic for scalar array */
21 HV* xmg_stash; /* class package */
25 #if !defined(PERL_EXPERIMENTAL_LAYOUT)
26 typedef struct xpvav xpvav_allocated;
29 SSize_t xav_fill; /* Index of last element present */
30 SSize_t xav_max; /* max index for which array has space */
32 IV xivu_iv; /* integer value or pv offset */
36 MAGIC* xmg_magic; /* magic for scalar array */
37 HV* xmg_stash; /* class package */
43 #define xav_alloc xiv_u.xivu_p1
46 /* AVf_REAL is set for all AVs whose xav_array contents are refcounted.
47 * Some things like "@_" and the scratchpad list do not set this, to
48 * indicate that they are cheating (for efficiency) by not refcounting
51 * AVf_REIFY is only meaningful on such "fake" AVs (i.e. where AVf_REAL
52 * is not set). It indicates that the fake AV is capable of becoming
53 * real if the array needs to be modified in some way. Functions that
54 * modify fake AVs check both flags to call av_reify() as appropriate.
56 * Note that the Perl stack and @DB::args have neither flag set. (Thus,
57 * items that go on the stack are never refcounted.)
59 * These internal details are subject to change any time. AV
60 * manipulations external to perl should not care about any of this.
67 =for apidoc AmU||Nullav
70 =head1 Array Manipulation Functions
72 =for apidoc Am|int|AvFILL|AV* av
73 Same as C<av_len()>. Deprecated, use C<av_len()> instead.
78 #define Nullav Null(AV*)
80 #define AvARRAY(av) ((av)->sv_u.svu_array)
81 #define AvALLOC(av) (*((SV***)&((XPVAV*) SvANY(av))->xav_alloc))
82 #define AvMAX(av) ((XPVAV*) SvANY(av))->xav_max
83 #define AvFILLp(av) ((XPVAV*) SvANY(av))->xav_fill
84 #define AvARYLEN(av) (*((SV**)&((XPVAV*) SvANY(av))->xav_arylen))
86 #define AvREAL(av) (SvFLAGS(av) & SVpav_REAL)
87 #define AvREAL_on(av) (SvFLAGS(av) |= SVpav_REAL)
88 #define AvREAL_off(av) (SvFLAGS(av) &= ~SVpav_REAL)
89 #define AvREAL_only(av) (AvREIFY_off(av), SvFLAGS(av) |= SVpav_REAL)
90 #define AvREIFY(av) (SvFLAGS(av) & SVpav_REIFY)
91 #define AvREIFY_on(av) (SvFLAGS(av) |= SVpav_REIFY)
92 #define AvREIFY_off(av) (SvFLAGS(av) &= ~SVpav_REIFY)
93 #define AvREIFY_only(av) (AvREAL_off(av), SvFLAGS(av) |= SVpav_REIFY)
95 #define AvREALISH(av) (SvFLAGS(av) & (SVpav_REAL|SVpav_REIFY))
97 #define AvFILL(av) ((SvRMAGICAL((SV *) (av))) \
98 ? mg_size((SV *) av) : AvFILLp(av))
100 #define NEGATIVE_INDICES_VAR "NEGATIVE_INDICES"
104 * c-indentation-style: bsd
106 * indent-tabs-mode: t
109 * ex: set ts=8 sts=4 sw=4 noet: