| 1 | /* av.h |
| 2 | * |
| 3 | * Copyright (C) 1991, 1992, 1993, 1995, 1996, 1997, 1998, 1999, |
| 4 | * 2000, 2001, 2002, 2005, by Larry Wall and others |
| 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 | * |
| 9 | */ |
| 10 | |
| 11 | struct xpvav { |
| 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 */ |
| 15 | union { |
| 16 | IV xivu_iv; /* integer value or pv offset */ |
| 17 | UV xivu_uv; |
| 18 | void * xivu_p1; |
| 19 | } xiv_u; |
| 20 | MAGIC* xmg_magic; /* magic for scalar array */ |
| 21 | HV* xmg_stash; /* class package */ |
| 22 | }; |
| 23 | |
| 24 | #if 0 |
| 25 | typedef struct xpvav xpvav_allocated; |
| 26 | #else |
| 27 | typedef struct { |
| 28 | SSize_t xav_fill; /* Index of last element present */ |
| 29 | SSize_t xav_max; /* max index for which array has space */ |
| 30 | union { |
| 31 | IV xivu_iv; /* integer value or pv offset */ |
| 32 | UV xivu_uv; |
| 33 | void * xivu_p1; |
| 34 | } xiv_u; |
| 35 | MAGIC* xmg_magic; /* magic for scalar array */ |
| 36 | HV* xmg_stash; /* class package */ |
| 37 | } xpvav_allocated; |
| 38 | #endif |
| 39 | |
| 40 | /* SV** xav_alloc; */ |
| 41 | #define xav_alloc xiv_u.xivu_p1 |
| 42 | /* SV* xav_arylen; */ |
| 43 | |
| 44 | /* SVpav_REAL is set for all AVs whose xav_array contents are refcounted. |
| 45 | * Some things like "@_" and the scratchpad list do not set this, to |
| 46 | * indicate that they are cheating (for efficiency) by not refcounting |
| 47 | * the AV's contents. |
| 48 | * |
| 49 | * SVpav_REIFY is only meaningful on such "fake" AVs (i.e. where SVpav_REAL |
| 50 | * is not set). It indicates that the fake AV is capable of becoming |
| 51 | * real if the array needs to be modified in some way. Functions that |
| 52 | * modify fake AVs check both flags to call av_reify() as appropriate. |
| 53 | * |
| 54 | * Note that the Perl stack and @DB::args have neither flag set. (Thus, |
| 55 | * items that go on the stack are never refcounted.) |
| 56 | * |
| 57 | * These internal details are subject to change any time. AV |
| 58 | * manipulations external to perl should not care about any of this. |
| 59 | * GSAR 1999-09-10 |
| 60 | */ |
| 61 | |
| 62 | /* |
| 63 | =head1 Handy Values |
| 64 | |
| 65 | =for apidoc AmU||Nullav |
| 66 | Null AV pointer. |
| 67 | |
| 68 | =head1 Array Manipulation Functions |
| 69 | |
| 70 | =for apidoc Am|int|AvFILL|AV* av |
| 71 | Same as C<av_len()>. Deprecated, use C<av_len()> instead. |
| 72 | |
| 73 | =cut |
| 74 | */ |
| 75 | |
| 76 | #define Nullav Null(AV*) |
| 77 | |
| 78 | #define AvARRAY(av) ((av)->sv_u.svu_array) |
| 79 | #define AvALLOC(av) (*((SV***)&((XPVAV*) SvANY(av))->xav_alloc)) |
| 80 | #define AvMAX(av) ((XPVAV*) SvANY(av))->xav_max |
| 81 | #define AvFILLp(av) ((XPVAV*) SvANY(av))->xav_fill |
| 82 | #define AvARYLEN(av) (*Perl_av_arylen_p(aTHX_ (AV*)av)) |
| 83 | |
| 84 | #define AvREAL(av) (SvFLAGS(av) & SVpav_REAL) |
| 85 | #define AvREAL_on(av) (SvFLAGS(av) |= SVpav_REAL) |
| 86 | #define AvREAL_off(av) (SvFLAGS(av) &= ~SVpav_REAL) |
| 87 | #define AvREAL_only(av) (AvREIFY_off(av), SvFLAGS(av) |= SVpav_REAL) |
| 88 | #define AvREIFY(av) (SvFLAGS(av) & SVpav_REIFY) |
| 89 | #define AvREIFY_on(av) (SvFLAGS(av) |= SVpav_REIFY) |
| 90 | #define AvREIFY_off(av) (SvFLAGS(av) &= ~SVpav_REIFY) |
| 91 | #define AvREIFY_only(av) (AvREAL_off(av), SvFLAGS(av) |= SVpav_REIFY) |
| 92 | |
| 93 | #define AvREALISH(av) (SvFLAGS(av) & (SVpav_REAL|SVpav_REIFY)) |
| 94 | |
| 95 | #define AvFILL(av) ((SvRMAGICAL((SV *) (av))) \ |
| 96 | ? mg_size((SV *) av) : AvFILLp(av)) |
| 97 | |
| 98 | #define NEGATIVE_INDICES_VAR "NEGATIVE_INDICES" |
| 99 | |
| 100 | /* |
| 101 | * Local variables: |
| 102 | * c-indentation-style: bsd |
| 103 | * c-basic-offset: 4 |
| 104 | * indent-tabs-mode: t |
| 105 | * End: |
| 106 | * |
| 107 | * ex: set ts=8 sts=4 sw=4 noet: |
| 108 | */ |