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 */
21 MAGIC* xmg_magic; /* linked list of magicalness */
22 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
24 HV* xmg_stash; /* class package */
28 typedef struct xpvav xpvav_allocated;
31 SSize_t xav_fill; /* Index of last element present */
32 SSize_t xav_max; /* max index for which array has space */
34 IV xivu_iv; /* integer value or pv offset */
39 MAGIC* xmg_magic; /* linked list of magicalness */
40 HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
42 HV* xmg_stash; /* class package */
47 #define xav_alloc xiv_u.xivu_p1
50 /* SVpav_REAL is set for all AVs whose xav_array contents are refcounted.
51 * Some things like "@_" and the scratchpad list do not set this, to
52 * indicate that they are cheating (for efficiency) by not refcounting
55 * SVpav_REIFY is only meaningful on such "fake" AVs (i.e. where SVpav_REAL
56 * is not set). It indicates that the fake AV is capable of becoming
57 * real if the array needs to be modified in some way. Functions that
58 * modify fake AVs check both flags to call av_reify() as appropriate.
60 * Note that the Perl stack and @DB::args have neither flag set. (Thus,
61 * items that go on the stack are never refcounted.)
63 * These internal details are subject to change any time. AV
64 * manipulations external to perl should not care about any of this.
71 =for apidoc AmU||Nullav
74 =head1 Array Manipulation Functions
76 =for apidoc Am|int|AvFILL|AV* av
77 Same as C<av_len()>. Deprecated, use C<av_len()> instead.
82 #define Nullav Null(AV*)
84 #define AvARRAY(av) ((av)->sv_u.svu_array)
85 #define AvALLOC(av) (*((SV***)&((XPVAV*) SvANY(av))->xav_alloc))
86 #define AvMAX(av) ((XPVAV*) SvANY(av))->xav_max
87 #define AvFILLp(av) ((XPVAV*) SvANY(av))->xav_fill
88 #define AvARYLEN(av) (*Perl_av_arylen_p(aTHX_ (AV*)av))
90 #define AvREAL(av) (SvFLAGS(av) & SVpav_REAL)
91 #define AvREAL_on(av) (SvFLAGS(av) |= SVpav_REAL)
92 #define AvREAL_off(av) (SvFLAGS(av) &= ~SVpav_REAL)
93 #define AvREAL_only(av) (AvREIFY_off(av), SvFLAGS(av) |= SVpav_REAL)
94 #define AvREIFY(av) (SvFLAGS(av) & SVpav_REIFY)
95 #define AvREIFY_on(av) (SvFLAGS(av) |= SVpav_REIFY)
96 #define AvREIFY_off(av) (SvFLAGS(av) &= ~SVpav_REIFY)
97 #define AvREIFY_only(av) (AvREAL_off(av), SvFLAGS(av) |= SVpav_REIFY)
99 #define AvREALISH(av) (SvFLAGS(av) & (SVpav_REAL|SVpav_REIFY))
101 #define AvFILL(av) ((SvRMAGICAL((SV *) (av))) \
102 ? mg_size((SV *) av) : AvFILLp(av))
104 #define NEGATIVE_INDICES_VAR "NEGATIVE_INDICES"
108 * c-indentation-style: bsd
110 * indent-tabs-mode: t
113 * ex: set ts=8 sts=4 sw=4 noet: