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/* hv.h
*
* Copyright (c) 1991-1999, 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.
*
*/
typedef struct he HE;
typedef struct hek HEK;
struct he {
HE *hent_next;
HEK *hent_hek;
SV *hent_val;
};
struct hek {
U32 hek_hash;
I32 hek_len;
char hek_key[1];
};
/* This structure must match the beginning of struct xpvmg in sv.h. */
struct xpvhv {
char * xhv_array; /* pointer to malloced string */
STRLEN xhv_fill; /* how full xhv_array currently is */
STRLEN xhv_max; /* subscript of last element of xhv_array */
IV xhv_keys; /* how many elements in the array */
NV xnv_nv; /* numeric value, if any */
MAGIC* xmg_magic; /* magic for scalar array */
HV* xmg_stash; /* class package */
I32 xhv_riter; /* current root of iterator */
HE *xhv_eiter; /* current entry of iterator */
PMOP *xhv_pmroot; /* list of pm's for this package */
char *xhv_name; /* name, if a symbol table */
};
#define PERL_HASH(hash,str,len) \
STMT_START { \
register const char *s_PeRlHaSh = str; \
register I32 i_PeRlHaSh = len; \
register U32 hash_PeRlHaSh = 0; \
while (i_PeRlHaSh--) \
hash_PeRlHaSh = hash_PeRlHaSh * 33 + *s_PeRlHaSh++; \
(hash) = hash_PeRlHaSh + (hash_PeRlHaSh>>5); \
} STMT_END
/* these hash entry flags ride on hent_klen (for use only in magic/tied HVs) */
#define HEf_SVKEY -2 /* hent_key is a SV* */
#define Nullhv Null(HV*)
#define HvARRAY(hv) ((HE**)((XPVHV*) SvANY(hv))->xhv_array)
#define HvFILL(hv) ((XPVHV*) SvANY(hv))->xhv_fill
#define HvMAX(hv) ((XPVHV*) SvANY(hv))->xhv_max
#define HvKEYS(hv) ((XPVHV*) SvANY(hv))->xhv_keys
#define HvRITER(hv) ((XPVHV*) SvANY(hv))->xhv_riter
#define HvEITER(hv) ((XPVHV*) SvANY(hv))->xhv_eiter
#define HvPMROOT(hv) ((XPVHV*) SvANY(hv))->xhv_pmroot
#define HvNAME(hv) ((XPVHV*) SvANY(hv))->xhv_name
#define HvSHAREKEYS(hv) (SvFLAGS(hv) & SVphv_SHAREKEYS)
#define HvSHAREKEYS_on(hv) (SvFLAGS(hv) |= SVphv_SHAREKEYS)
#define HvSHAREKEYS_off(hv) (SvFLAGS(hv) &= ~SVphv_SHAREKEYS)
#define HvLAZYDEL(hv) (SvFLAGS(hv) & SVphv_LAZYDEL)
#define HvLAZYDEL_on(hv) (SvFLAGS(hv) |= SVphv_LAZYDEL)
#define HvLAZYDEL_off(hv) (SvFLAGS(hv) &= ~SVphv_LAZYDEL)
/* Maybe amagical: */
/* #define HV_AMAGICmb(hv) (SvFLAGS(hv) & (SVpgv_badAM | SVpgv_AM)) */
#define HV_AMAGIC(hv) (SvFLAGS(hv) & SVpgv_AM)
#define HV_AMAGIC_on(hv) (SvFLAGS(hv) |= SVpgv_AM)
#define HV_AMAGIC_off(hv) (SvFLAGS(hv) &= ~SVpgv_AM)
/*
#define HV_AMAGICbad(hv) (SvFLAGS(hv) & SVpgv_badAM)
#define HV_badAMAGIC_on(hv) (SvFLAGS(hv) |= SVpgv_badAM)
#define HV_badAMAGIC_off(hv) (SvFLAGS(hv) &= ~SVpgv_badAM)
*/
#define Nullhe Null(HE*)
#define HeNEXT(he) (he)->hent_next
#define HeKEY_hek(he) (he)->hent_hek
#define HeKEY(he) HEK_KEY(HeKEY_hek(he))
#define HeKEY_sv(he) (*(SV**)HeKEY(he))
#define HeKLEN(he) HEK_LEN(HeKEY_hek(he))
#define HeVAL(he) (he)->hent_val
#define HeHASH(he) HEK_HASH(HeKEY_hek(he))
#define HePV(he,lp) ((HeKLEN(he) == HEf_SVKEY) ? \
SvPV(HeKEY_sv(he),lp) : \
(((lp = HeKLEN(he)) >= 0) ? \
HeKEY(he) : Nullch))
#define HeSVKEY(he) ((HeKEY(he) && \
HeKLEN(he) == HEf_SVKEY) ? \
HeKEY_sv(he) : Nullsv)
#define HeSVKEY_force(he) (HeKEY(he) ? \
((HeKLEN(he) == HEf_SVKEY) ? \
HeKEY_sv(he) : \
sv_2mortal(newSVpvn(HeKEY(he), \
HeKLEN(he)))) : \
&PL_sv_undef)
#define HeSVKEY_set(he,sv) ((HeKLEN(he) = HEf_SVKEY), (HeKEY_sv(he) = sv))
#define Nullhek Null(HEK*)
#define HEK_BASESIZE STRUCT_OFFSET(HEK, hek_key[0])
#define HEK_HASH(hek) (hek)->hek_hash
#define HEK_LEN(hek) (hek)->hek_len
#define HEK_KEY(hek) (hek)->hek_key
#if defined(STRANGE_MALLOC) || defined(MYMALLOC)
# define PERL_HV_ARRAY_ALLOC_BYTES(size) ((size) * sizeof(HE*))
#else
# define MALLOC_OVERHEAD 16
# define PERL_HV_ARRAY_ALLOC_BYTES(size) \
(((size) < 64) \
? (size) * sizeof(HE*) \
: (size) * sizeof(HE*) * 2 - MALLOC_OVERHEAD)
#endif
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