-/* $RCSfile: array.h,v $$Revision: 4.1 $$Date: 92/08/07 17:18:24 $
+/* av.h
*
- * Copyright (c) 1991, Larry Wall
+ * Copyright (C) 1991, 1992, 1993, 1995, 1996, 1997, 1998, 1999,
+ * 2000, 2001, 2002, 2005, 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.
*
- * $Log: array.h,v $
- * Revision 4.1 92/08/07 17:18:24 lwall
- * Stage 6 Snapshot
- *
- * Revision 4.0.1.2 92/06/08 11:45:57 lwall
- * patch20: removed implicit int declarations on funcions
- *
- * Revision 4.0.1.1 91/06/07 10:19:20 lwall
- * patch4: new copyright notice
- *
- * Revision 4.0 91/03/20 01:03:44 lwall
- * 4.0 baseline.
- *
*/
struct xpvav {
- char * xpv_pv; /* pointer to malloced string */
- STRLEN xpv_cur; /* length of xp_pv as a C string */
- STRLEN xpv_len; /* allocated size */
- STRLEN xof_off; /* ptr is incremented by offset */
- double xnv_nv; /* numeric value, if any */
- MAGIC* xmg_magic; /* magic for scalar array */
+ union {
+ NV xnv_nv; /* numeric value, if any */
+ HV * xgv_stash;
+ struct {
+ U32 xlow;
+ U32 xhigh;
+ } xpad_cop_seq; /* used by pad.c for cop_sequence */
+ struct {
+ U32 xbm_previous; /* how many characters in string before rare? */
+ U8 xbm_flags;
+ U8 xbm_rare; /* rarest character in string */
+ } xbm_s; /* fields from PVBM */
+ } xnv_u;
+ SSize_t xav_fill; /* Index of last element present */
+ SSize_t xav_max; /* max index for which array has space */
+ union {
+ IV xivu_iv; /* integer value or pv offset */
+ UV xivu_uv;
+ void * xivu_p1;
+ I32 xivu_i32;
+ HEK * xivu_namehek;
+ } xiv_u;
+ union {
+ MAGIC* xmg_magic; /* linked list of magicalness */
+ HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
+ } xmg_u;
HV* xmg_stash; /* class package */
+};
- MAGIC* xav_magic; /* magic for elements */
+#if 0
+typedef struct xpvav xpvav_allocated;
+#else
+typedef struct {
+ SSize_t xav_fill; /* Index of last element present */
+ SSize_t xav_max; /* max index for which array has space */
+ union {
+ IV xivu_iv; /* integer value or pv offset */
+ UV xivu_uv;
+ void * xivu_p1;
+ I32 xivu_i32;
+ HEK * xivu_namehek;
+ } xiv_u;
+ union {
+ MAGIC* xmg_magic; /* linked list of magicalness */
+ HV* xmg_ourstash; /* Stash for our (when SvPAD_OUR is true) */
+ } xmg_u;
+ HV* xmg_stash; /* class package */
+} xpvav_allocated;
+#endif
- SV** xav_array;
- SV** xav_alloc;
- SV* xav_arylen;
- I32 xav_max;
- I32 xav_fill;
- U8 xav_flags;
-};
+/* SV** xav_alloc; */
+#define xav_alloc xiv_u.xivu_p1
+/* SV* xav_arylen; */
-#define AVf_REAL 1 /* free old entries */
+/* 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 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
+ */
+
+/*
+=head1 Handy Values
+
+=for apidoc AmU||Nullav
+Null AV pointer.
+
+=head1 Array Manipulation Functions
+
+=for apidoc Am|int|AvFILL|AV* av
+Same as C<av_len()>. Deprecated, use C<av_len()> instead.
+
+=cut
+*/
#define Nullav Null(AV*)
-#define AvMAGIC(av) ((XPVAV*) SvANY(av))->xav_magic
-#define AvARRAY(av) ((XPVAV*) SvANY(av))->xav_array
-#define AvALLOC(av) ((XPVAV*) SvANY(av))->xav_alloc
+#define AvARRAY(av) ((av)->sv_u.svu_array)
+#define AvALLOC(av) (*((SV***)&((XPVAV*) SvANY(av))->xav_alloc))
#define AvMAX(av) ((XPVAV*) SvANY(av))->xav_max
-#define AvFILL(av) ((XPVAV*) SvANY(av))->xav_fill
-#define AvARYLEN(av) ((XPVAV*) SvANY(av))->xav_arylen
-#define AvFLAGS(av) ((XPVAV*) SvANY(av))->xav_flags
+#define AvFILLp(av) ((XPVAV*) SvANY(av))->xav_fill
+#define AvARYLEN(av) (*Perl_av_arylen_p(aTHX_ (AV*)av))
-#define AvREAL(av) (((XPVAV*) SvANY(av))->xav_flags & AVf_REAL)
-#define AvREAL_on(av) (((XPVAV*) SvANY(av))->xav_flags |= AVf_REAL)
-#define AvREAL_off(av) (((XPVAV*) SvANY(av))->xav_flags &= ~AVf_REAL)
+#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((SV *) (av))) \
+ ? mg_size((SV *) av) : AvFILLp(av))
+
+#define NEGATIVE_INDICES_VAR "NEGATIVE_INDICES"
+
+/*
+ * Local variables:
+ * c-indentation-style: bsd
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ *
+ * ex: set ts=8 sts=4 sw=4 noet:
+ */
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