Commit | Line | Data |
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a0d0e21e | 1 | /* av.h |
79072805 | 2 | * |
1129b882 NC |
3 | * Copyright (C) 1991, 1992, 1993, 1995, 1996, 1997, 1998, 1999, 2000, |
4 | * 2001, 2002, 2005, 2006, 2007, 2008, by Larry Wall and others | |
79072805 LW |
5 | * |
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. | |
8 | * | |
79072805 LW |
9 | */ |
10 | ||
11 | struct xpvav { | |
c8e503bf NC |
12 | union _xnvu xnv_u; |
13 | SSize_t xav_fill; /* Index of last element present */ | |
14 | SSize_t xav_max; /* max index for which array has space */ | |
20f4945e | 15 | _XPVMG_HEAD; |
79072805 LW |
16 | }; |
17 | ||
e4305a63 | 18 | /* SV** xav_alloc; */ |
311a25d9 | 19 | #define xav_alloc xiv_u.xivu_p1 |
e4305a63 | 20 | /* SV* xav_arylen; */ |
61b858cf | 21 | |
8c18259e | 22 | /* SVpav_REAL is set for all AVs whose xav_array contents are refcounted. |
61b858cf GS |
23 | * Some things like "@_" and the scratchpad list do not set this, to |
24 | * indicate that they are cheating (for efficiency) by not refcounting | |
25 | * the AV's contents. | |
26 | * | |
8c18259e | 27 | * SVpav_REIFY is only meaningful on such "fake" AVs (i.e. where SVpav_REAL |
61b858cf GS |
28 | * is not set). It indicates that the fake AV is capable of becoming |
29 | * real if the array needs to be modified in some way. Functions that | |
30 | * modify fake AVs check both flags to call av_reify() as appropriate. | |
31 | * | |
3ddcf04c GS |
32 | * Note that the Perl stack and @DB::args have neither flag set. (Thus, |
33 | * items that go on the stack are never refcounted.) | |
61b858cf GS |
34 | * |
35 | * These internal details are subject to change any time. AV | |
36 | * manipulations external to perl should not care about any of this. | |
37 | * GSAR 1999-09-10 | |
38 | */ | |
79072805 | 39 | |
954c1994 | 40 | /* |
ccfc67b7 JH |
41 | =head1 Handy Values |
42 | ||
954c1994 GS |
43 | =for apidoc AmU||Nullav |
44 | Null AV pointer. | |
45 | ||
3ae1b226 NC |
46 | (deprecated - use C<(AV *)NULL> instead) |
47 | ||
ccfc67b7 JH |
48 | =head1 Array Manipulation Functions |
49 | ||
954c1994 GS |
50 | =for apidoc Am|int|AvFILL|AV* av |
51 | Same as C<av_len()>. Deprecated, use C<av_len()> instead. | |
52 | ||
53 | =cut | |
54 | */ | |
55 | ||
3ae1b226 NC |
56 | #ifndef PERL_CORE |
57 | # define Nullav Null(AV*) | |
58 | #endif | |
79072805 | 59 | |
339049b0 | 60 | #define AvARRAY(av) ((av)->sv_u.svu_array) |
e4305a63 | 61 | #define AvALLOC(av) (*((SV***)&((XPVAV*) SvANY(av))->xav_alloc)) |
79072805 | 62 | #define AvMAX(av) ((XPVAV*) SvANY(av))->xav_max |
93965878 | 63 | #define AvFILLp(av) ((XPVAV*) SvANY(av))->xav_fill |
a062e10d | 64 | #define AvARYLEN(av) (*Perl_av_arylen_p(aTHX_ MUTABLE_AV(av))) |
79072805 | 65 | |
11ca45c0 NC |
66 | #define AvREAL(av) (SvFLAGS(av) & SVpav_REAL) |
67 | #define AvREAL_on(av) (SvFLAGS(av) |= SVpav_REAL) | |
68 | #define AvREAL_off(av) (SvFLAGS(av) &= ~SVpav_REAL) | |
69 | #define AvREAL_only(av) (AvREIFY_off(av), SvFLAGS(av) |= SVpav_REAL) | |
70 | #define AvREIFY(av) (SvFLAGS(av) & SVpav_REIFY) | |
71 | #define AvREIFY_on(av) (SvFLAGS(av) |= SVpav_REIFY) | |
72 | #define AvREIFY_off(av) (SvFLAGS(av) &= ~SVpav_REIFY) | |
73 | #define AvREIFY_only(av) (AvREAL_off(av), SvFLAGS(av) |= SVpav_REIFY) | |
a0d0e21e | 74 | |
11ca45c0 | 75 | #define AvREALISH(av) (SvFLAGS(av) & (SVpav_REAL|SVpav_REIFY)) |
93965878 | 76 | |
b1bc3f34 NC |
77 | #define AvFILL(av) ((SvRMAGICAL((const SV *) (av))) \ |
78 | ? mg_size(MUTABLE_SV(av)) : AvFILLp(av)) | |
a0d0e21e | 79 | |
6f12eb6d | 80 | #define NEGATIVE_INDICES_VAR "NEGATIVE_INDICES" |
102d3b8a NC |
81 | |
82 | /* | |
ac572bf4 NC |
83 | =for apidoc newAV |
84 | ||
85 | Creates a new AV. The reference count is set to 1. | |
86 | ||
87 | =cut | |
88 | */ | |
89 | ||
a062e10d | 90 | #define newAV() MUTABLE_AV(newSV_type(SVt_PVAV)) |
ac572bf4 NC |
91 | |
92 | /* | |
102d3b8a NC |
93 | * Local variables: |
94 | * c-indentation-style: bsd | |
95 | * c-basic-offset: 4 | |
96 | * indent-tabs-mode: t | |
97 | * End: | |
98 | * | |
99 | * ex: set ts=8 sts=4 sw=4 noet: | |
100 | */ |