You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
81 lines
2.9 KiB
81 lines
2.9 KiB
/* av.h
|
|
*
|
|
* Copyright (c) 1991-2001, Larry Wall
|
|
*
|
|
* 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 {
|
|
char* xav_array; /* pointer to first array element */
|
|
SSize_t xav_fill; /* Index of last element present */
|
|
SSize_t xav_max; /* max index for which array has space */
|
|
IV xof_off; /* ptr is incremented by offset */
|
|
NV xnv_nv; /* numeric value, if any */
|
|
MAGIC* xmg_magic; /* magic for scalar array */
|
|
HV* xmg_stash; /* class package */
|
|
|
|
SV** xav_alloc; /* pointer to malloced string */
|
|
SV* xav_arylen;
|
|
U8 xav_flags;
|
|
};
|
|
|
|
|
|
/* AVf_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.
|
|
*
|
|
* AVf_REIFY is only meaningful on such "fake" AVs (i.e. where AVf_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 and @DB::args have 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
|
|
*/
|
|
#define AVf_REAL 1 /* free old entries */
|
|
#define AVf_REIFY 2 /* can become real */
|
|
|
|
/* XXX this is not used anywhere */
|
|
#define AVf_REUSED 4 /* got undeffed--don't turn old memory into SVs now */
|
|
|
|
/*
|
|
=for apidoc AmU||Nullav
|
|
Null AV pointer.
|
|
|
|
=for apidoc Am|int|AvFILL|AV* av
|
|
Same as C<av_len()>. Deprecated, use C<av_len()> instead.
|
|
|
|
=cut
|
|
*/
|
|
|
|
#define Nullav Null(AV*)
|
|
|
|
#define AvARRAY(av) ((SV**)((XPVAV*) SvANY(av))->xav_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) ((XPVAV*) SvANY(av))->xav_arylen
|
|
#define AvFLAGS(av) ((XPVAV*) SvANY(av))->xav_flags
|
|
|
|
#define AvREAL(av) (AvFLAGS(av) & AVf_REAL)
|
|
#define AvREAL_on(av) (AvFLAGS(av) |= AVf_REAL)
|
|
#define AvREAL_off(av) (AvFLAGS(av) &= ~AVf_REAL)
|
|
#define AvREIFY(av) (AvFLAGS(av) & AVf_REIFY)
|
|
#define AvREIFY_on(av) (AvFLAGS(av) |= AVf_REIFY)
|
|
#define AvREIFY_off(av) (AvFLAGS(av) &= ~AVf_REIFY)
|
|
#define AvREUSED(av) (AvFLAGS(av) & AVf_REUSED)
|
|
#define AvREUSED_on(av) (AvFLAGS(av) |= AVf_REUSED)
|
|
#define AvREUSED_off(av) (AvFLAGS(av) &= ~AVf_REUSED)
|
|
|
|
#define AvREALISH(av) (AvFLAGS(av) & (AVf_REAL|AVf_REIFY))
|
|
|
|
#define AvFILL(av) ((SvRMAGICAL((SV *) (av))) \
|
|
? mg_size((SV *) av) : AvFILLp(av))
|
|
|