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av.h
/* av.h * * Copyright (C) 1991, 1992, 1993, 1995, 1996, 1997, 1998, 1999, 2000, * 2001, 2002, 2005, 2006, 2007, 2008, 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 { HV* xmg_stash; /* class package */ union _xmgu xmg_u; SSize_t xav_fill; /* Index of last element present */ SSize_t xav_max; /* max index for which array has space */ SV** xav_alloc; /* pointer to beginning of C array of SVs */ }; /* SV* xav_arylen; */ /* SVpav_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. * * SVpav_REIFY is only meaningful on such "fake" AVs (i.e. where SVpav_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 has 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 */ /* =for apidoc ADmnU||Nullav Null AV pointer. (deprecated - use C<(AV *)NULL> instead) =for apidoc Am|SSize_t|AvFILL|AV* av Same as C<L</av_top_index>> or C<L</av_tindex>>. =for apidoc Cm|SSize_t|AvFILLp|AV* av If the array C<av> is empty, this returns -1; otherwise it returns the maximum value of the indices of all the array elements which are currently defined in C<av>. It does not handle magic, hence the C<p> private indication in its name. =for apidoc Am|SV**|AvARRAY|AV* av Returns a pointer to the AV's internal SV* array. This is useful for doing pointer arithmetic on the array. If all you need is to look up an array element, then prefer C<av_fetch>. =cut */ #ifndef PERL_CORE # define Nullav Null(AV*) #endif #define AvARRAY(av) ((av)->sv_u.svu_array) #define AvALLOC(av) ((XPVAV*) SvANY(av))->xav_alloc #define AvMAX(av) ((XPVAV*) SvANY(av))->xav_max #define AvFILLp(av) ((XPVAV*) SvANY(av))->xav_fill #define AvARYLEN(av) (*Perl_av_arylen_p(aTHX_ MUTABLE_AV(av))) #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((const SV *) (av))) \ ? mg_size(MUTABLE_SV(av)) : AvFILLp(av)) #define av_top_index(av) AvFILL(av) #define av_tindex(av) av_top_index(av) /* Note that it doesn't make sense to do this: * SvGETMAGIC(av); IV x = av_tindex_nomg(av); */ # define av_top_index_skip_len_mg(av) \ (__ASSERT_(SvTYPE(av) == SVt_PVAV) AvFILLp(av)) # define av_tindex_skip_len_mg(av) av_top_index_skip_len_mg(av) #define NEGATIVE_INDICES_VAR "NEGATIVE_INDICES" /* =for apidoc newAV Creates a new AV. The reference count is set to 1. Perl equivalent: C<my @array;>. =cut */ #define newAV() MUTABLE_AV(newSV_type(SVt_PVAV)) /* * ex: set ts=8 sts=4 sw=4 et: */