X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/dd69841bebe1fc7f7a6b248576221520a0418d52..f815dc14d7c5540dfb5d02d001e0101c6266f281:/hv.h diff --git a/hv.h b/hv.h index 67432e9..6ebd5d5 100644 --- a/hv.h +++ b/hv.h @@ -1,13 +1,33 @@ /* hv.h * * Copyright (C) 1991, 1992, 1993, 1996, 1997, 1998, 1999, - * 2000, 2001, 2002, 2003, 2005, 2006, 2007, by Larry Wall and others + * 2000, 2001, 2002, 2003, 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. * */ +/* These control hash traversal randomization and the environment variable PERL_PERTURB_KEYS. + * Currently disabling this functionality will break a few tests, but should otherwise work fine. + * See perlrun for more details. */ + +#if defined(PERL_PERTURB_KEYS_DISABLED) +# define PL_HASH_RAND_BITS_ENABLED 0 +# define PERL_HASH_ITER_BUCKET(iter) ((iter)->xhv_riter) +#else +# define PERL_HASH_RANDOMIZE_KEYS 1 +# if defined(PERL_PERTURB_KEYS_RANDOM) +# define PL_HASH_RAND_BITS_ENABLED 1 +# elif defined(PERL_PERTURB_KEYS_DETERMINISTIC) +# define PL_HASH_RAND_BITS_ENABLED 2 +# else +# define USE_PERL_PERTURB_KEYS 1 +# define PL_HASH_RAND_BITS_ENABLED PL_hash_rand_bits_enabled +# endif +# define PERL_HASH_ITER_BUCKET(iter) (((iter)->xhv_riter) ^ ((iter)->xhv_rand)) +#endif + /* entry in hash value chain */ struct he { /* Keep hent_next first in this structure, because sv_free_arenas take @@ -41,143 +61,74 @@ struct shared_he { Use the funcs in mro.c */ -typedef enum { - MRO_DFS, /* 0 */ - MRO_C3 /* 1 */ -} mro_alg; +struct mro_alg { + AV *(*resolve)(pTHX_ HV* stash, U32 level); + const char *name; + U16 length; + U16 kflags; /* For the hash API - set HVhek_UTF8 if name is UTF-8 */ + U32 hash; /* or 0 */ +}; struct mro_meta { - AV *mro_linear_dfs; /* cached dfs @ISA linearization */ - AV *mro_linear_c3; /* cached c3 @ISA linearization */ + /* a hash holding the different MROs private data. */ + HV *mro_linear_all; + /* a pointer directly to the current MROs private data. If mro_linear_all + is NULL, this owns the SV reference, else it is just a pointer to a + value stored in and owned by mro_linear_all. */ + SV *mro_linear_current; HV *mro_nextmethod; /* next::method caching */ U32 cache_gen; /* Bumping this invalidates our method cache */ - mro_alg mro_which; /* which mro alg is in use? */ + U32 pkg_gen; /* Bumps when local methods/@ISA change */ + const struct mro_alg *mro_which; /* which mro alg is in use? */ + HV *isa; /* Everything this class @ISA */ }; +#define MRO_GET_PRIVATE_DATA(smeta, which) \ + (((smeta)->mro_which && (which) == (smeta)->mro_which) \ + ? (smeta)->mro_linear_current \ + : Perl_mro_get_private_data(aTHX_ (smeta), (which))) + /* Subject to change. Don't access this directly. */ +union _xhvnameu { + HEK *xhvnameu_name; /* When xhv_name_count is 0 */ + HEK **xhvnameu_names; /* When xhv_name_count is non-0 */ +}; + struct xpvhv_aux { - HEK *xhv_name; /* name, if a symbol table */ + union _xhvnameu xhv_name_u; /* name, if a symbol table */ AV *xhv_backreferences; /* back references for weak references */ HE *xhv_eiter; /* current entry of iterator */ I32 xhv_riter; /* current root of iterator */ + +/* Concerning xhv_name_count: When non-zero, xhv_name_u contains a pointer + * to an array of HEK pointers, this being the length. The first element is + * the name of the stash, which may be NULL. If xhv_name_count is positive, + * then *xhv_name is one of the effective names. If xhv_name_count is nega- + * tive, then xhv_name_u.xhvnameu_names[1] is the first effective name. + */ + I32 xhv_name_count; struct mro_meta *xhv_mro_meta; + HV * xhv_super; /* SUPER method cache */ +#ifdef PERL_HASH_RANDOMIZE_KEYS + U32 xhv_rand; /* random value for hash traversal */ + U32 xhv_last_rand; /* last random value for hash traversal, + used to detect each() after insert for warnings */ +#endif + U32 xhv_fill_lazy; }; /* hash structure: */ /* This structure must match the beginning of struct xpvmg in sv.h. */ struct xpvhv { - 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; - STRLEN xhv_fill; /* how full xhv_array currently is */ - STRLEN xhv_max; /* subscript of last element of xhv_array */ - 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 */ + union _xmgu xmg_u; + STRLEN xhv_keys; /* total keys, including placeholders */ + STRLEN xhv_max; /* subscript of last element of xhv_array */ }; -#define xhv_keys xiv_u.xivu_iv - -typedef struct { - STRLEN xhv_fill; /* how full xhv_array currently is */ - STRLEN xhv_max; /* subscript of last element of xhv_array */ - 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 */ -} xpvhv_allocated; - -/* hash a key */ -/* FYI: This is the "One-at-a-Time" algorithm by Bob Jenkins - * from requirements by Colin Plumb. - * (http://burtleburtle.net/bob/hash/doobs.html) */ -/* The use of a temporary pointer and the casting games - * is needed to serve the dual purposes of - * (a) the hashed data being interpreted as "unsigned char" (new since 5.8, - * a "char" can be either signed or unsigned, depending on the compiler) - * (b) catering for old code that uses a "char" - * - * The "hash seed" feature was added in Perl 5.8.1 to perturb the results - * to avoid "algorithmic complexity attacks". - * - * If USE_HASH_SEED is defined, hash randomisation is done by default - * If USE_HASH_SEED_EXPLICIT is defined, hash randomisation is done - * only if the environment variable PERL_HASH_SEED is set. - * For maximal control, one can define PERL_HASH_SEED. - * (see also perl.c:perl_parse()). - */ -#ifndef PERL_HASH_SEED -# if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) -# define PERL_HASH_SEED PL_hash_seed -# else -# define PERL_HASH_SEED 0 -# endif -#endif -#define PERL_HASH(hash,str,len) \ - STMT_START { \ - register const char * const s_PeRlHaSh_tmp = str; \ - register const unsigned char *s_PeRlHaSh = (const unsigned char *)s_PeRlHaSh_tmp; \ - register I32 i_PeRlHaSh = len; \ - register U32 hash_PeRlHaSh = PERL_HASH_SEED; \ - while (i_PeRlHaSh--) { \ - hash_PeRlHaSh += *s_PeRlHaSh++; \ - hash_PeRlHaSh += (hash_PeRlHaSh << 10); \ - hash_PeRlHaSh ^= (hash_PeRlHaSh >> 6); \ - } \ - hash_PeRlHaSh += (hash_PeRlHaSh << 3); \ - hash_PeRlHaSh ^= (hash_PeRlHaSh >> 11); \ - (hash) = (hash_PeRlHaSh + (hash_PeRlHaSh << 15)); \ - } STMT_END - -/* Only hv.c and mod_perl should be doing this. */ -#ifdef PERL_HASH_INTERNAL_ACCESS -#define PERL_HASH_INTERNAL(hash,str,len) \ - STMT_START { \ - register const char * const s_PeRlHaSh_tmp = str; \ - register const unsigned char *s_PeRlHaSh = (const unsigned char *)s_PeRlHaSh_tmp; \ - register I32 i_PeRlHaSh = len; \ - register U32 hash_PeRlHaSh = PL_rehash_seed; \ - while (i_PeRlHaSh--) { \ - hash_PeRlHaSh += *s_PeRlHaSh++; \ - hash_PeRlHaSh += (hash_PeRlHaSh << 10); \ - hash_PeRlHaSh ^= (hash_PeRlHaSh >> 6); \ - } \ - hash_PeRlHaSh += (hash_PeRlHaSh << 3); \ - hash_PeRlHaSh ^= (hash_PeRlHaSh >> 11); \ - (hash) = (hash_PeRlHaSh + (hash_PeRlHaSh << 15)); \ - } STMT_END -#endif - /* =head1 Hash Manipulation Functions @@ -191,12 +142,34 @@ is to be expected. (For information only--not to be used). =for apidoc AmU||Nullhv Null HV pointer. +(deprecated - use C<(HV *)NULL> instead) + =head1 Hash Manipulation Functions =for apidoc Am|char*|HvNAME|HV* stash Returns the package name of a stash, or NULL if C isn't a stash. See C, C. +=for apidoc Am|STRLEN|HvNAMELEN|HV *stash +Returns the length of the stash's name. + +=for apidoc Am|unsigned char|HvNAMEUTF8|HV *stash +Returns true if the name is in UTF8 encoding. + +=for apidoc Am|char*|HvENAME|HV* stash +Returns the effective name of a stash, or NULL if there is none. The +effective name represents a location in the symbol table where this stash +resides. It is updated automatically when packages are aliased or deleted. +A stash that is no longer in the symbol table has no effective name. This +name is preferable to C for use in MRO linearisations and isa +caches. + +=for apidoc Am|STRLEN|HvENAMELEN|HV *stash +Returns the length of the stash's effective name. + +=for apidoc Am|unsigned char|HvENAMEUTF8|HV *stash +Returns true if the effective name is in UTF8 encoding. + =for apidoc Am|void*|HeKEY|HE* he Returns the actual pointer stored in the key slot of the hash entry. The pointer may be either C or C, depending on the value of @@ -210,7 +183,12 @@ be assigned to. The C macro is usually preferable for finding key lengths. =for apidoc Am|SV*|HeVAL|HE* he -Returns the value slot (type C) stored in the hash entry. +Returns the value slot (type C) stored in the hash entry. Can be assigned +to. + + SV *foo= HeVAL(hv); + HeVAL(hv)= sv; + =for apidoc Am|U32|HeHASH|HE* he Returns the computed hash stored in the hash entry. @@ -224,7 +202,18 @@ variable C, though this is rather less efficient than using a local variable. Remember though, that hash keys in perl are free to contain embedded nulls, so using C or similar is not a good way to find the length of hash keys. This is very similar to the C macro -described elsewhere in this document. +described elsewhere in this document. See also C. + +If you are using C to get values to pass to C to create a +new SV, you should consider using C as it is more +efficient. + +=for apidoc Am|char*|HeUTF8|HE* he +Returns whether the C value returned by C is encoded in UTF-8, +doing any necessary dereferencing of possibly C keys. The value returned +will be 0 or non-0, not necessarily 1 (or even a value with any low bits set), +so B blindly assign this to a C variable, as C may be a +typedef for C. =for apidoc Am|SV*|HeSVKEY|HE* he Returns the key as an C, or C if the hash entry does not @@ -242,50 +231,91 @@ C. =cut */ +#define PERL_HASH_DEFAULT_HvMAX 7 + /* these hash entry flags ride on hent_klen (for use only in magic/tied HVs) */ #define HEf_SVKEY -2 /* hent_key is an SV* */ - -#define Nullhv Null(HV*) +#ifndef PERL_CORE +# define Nullhv Null(HV*) +#endif #define HvARRAY(hv) ((hv)->sv_u.svu_hash) -#define HvFILL(hv) ((XPVHV*) SvANY(hv))->xhv_fill +#define HvFILL(hv) Perl_hv_fill(aTHX_ MUTABLE_HV(hv)) #define HvMAX(hv) ((XPVHV*) SvANY(hv))->xhv_max /* This quite intentionally does no flag checking first. That's your responsibility. */ #define HvAUX(hv) ((struct xpvhv_aux*)&(HvARRAY(hv)[HvMAX(hv)+1])) -#define HvRITER(hv) (*Perl_hv_riter_p(aTHX_ (HV*)(hv))) -#define HvEITER(hv) (*Perl_hv_eiter_p(aTHX_ (HV*)(hv))) -#define HvRITER_set(hv,r) Perl_hv_riter_set(aTHX_ (HV*)(hv), r) -#define HvEITER_set(hv,e) Perl_hv_eiter_set(aTHX_ (HV*)(hv), e) +#define HvRITER(hv) (*Perl_hv_riter_p(aTHX_ MUTABLE_HV(hv))) +#define HvEITER(hv) (*Perl_hv_eiter_p(aTHX_ MUTABLE_HV(hv))) +#define HvRITER_set(hv,r) Perl_hv_riter_set(aTHX_ MUTABLE_HV(hv), r) +#define HvEITER_set(hv,e) Perl_hv_eiter_set(aTHX_ MUTABLE_HV(hv), e) #define HvRITER_get(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_riter : -1) -#define HvEITER_get(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_eiter : 0) +#define HvEITER_get(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_eiter : NULL) +#define HvRAND_get(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_rand : 0) +#define HvLASTRAND_get(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_last_rand : 0) + #define HvNAME(hv) HvNAME_get(hv) -#define HvMROMETA(hv) (SvOOK(hv) \ - ? (HvAUX(hv)->xhv_mro_meta ? HvAUX(hv)->xhv_mro_meta : mro_meta_init(hv)) \ - : NULL) -/* FIXME - all of these should use a UTF8 aware API, which should also involve - getting the length. */ +#define HvNAMELEN(hv) HvNAMELEN_get(hv) +#define HvENAME(hv) HvENAME_get(hv) +#define HvENAMELEN(hv) HvENAMELEN_get(hv) + +/* Checking that hv is a valid package stash is the + caller's responsibility */ +#define HvMROMETA(hv) (HvAUX(hv)->xhv_mro_meta \ + ? HvAUX(hv)->xhv_mro_meta \ + : Perl_mro_meta_init(aTHX_ hv)) + +#define HvNAME_HEK_NN(hv) \ + ( \ + HvAUX(hv)->xhv_name_count \ + ? *HvAUX(hv)->xhv_name_u.xhvnameu_names \ + : HvAUX(hv)->xhv_name_u.xhvnameu_name \ + ) /* This macro may go away without notice. */ -#define HvNAME_HEK(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_name : 0) -#define HvNAME_get(hv) ((SvOOK(hv) && (HvAUX(hv)->xhv_name)) \ - ? HEK_KEY(HvAUX(hv)->xhv_name) : 0) -#define HvNAMELEN_get(hv) ((SvOOK(hv) && (HvAUX(hv)->xhv_name)) \ - ? HEK_LEN(HvAUX(hv)->xhv_name) : 0) - -/* the number of keys (including any placeholers) */ +#define HvNAME_HEK(hv) \ + (SvOOK(hv) && HvAUX(hv)->xhv_name_u.xhvnameu_name ? HvNAME_HEK_NN(hv) : NULL) +#define HvNAME_get(hv) \ + ((SvOOK(hv) && HvAUX(hv)->xhv_name_u.xhvnameu_name && HvNAME_HEK_NN(hv)) \ + ? HEK_KEY(HvNAME_HEK_NN(hv)) : NULL) +#define HvNAMELEN_get(hv) \ + ((SvOOK(hv) && HvAUX(hv)->xhv_name_u.xhvnameu_name && HvNAME_HEK_NN(hv)) \ + ? HEK_LEN(HvNAME_HEK_NN(hv)) : 0) +#define HvNAMEUTF8(hv) \ + ((SvOOK(hv) && HvAUX(hv)->xhv_name_u.xhvnameu_name && HvNAME_HEK_NN(hv)) \ + ? HEK_UTF8(HvNAME_HEK_NN(hv)) : 0) +#define HvENAME_HEK_NN(hv) \ + ( \ + HvAUX(hv)->xhv_name_count > 0 ? HvAUX(hv)->xhv_name_u.xhvnameu_names[0] : \ + HvAUX(hv)->xhv_name_count < -1 ? HvAUX(hv)->xhv_name_u.xhvnameu_names[1] : \ + HvAUX(hv)->xhv_name_count == -1 ? NULL : \ + HvAUX(hv)->xhv_name_u.xhvnameu_name \ + ) +#define HvENAME_HEK(hv) \ + (SvOOK(hv) && HvAUX(hv)->xhv_name_u.xhvnameu_name ? HvENAME_HEK_NN(hv) : NULL) +#define HvENAME_get(hv) \ + ((SvOOK(hv) && HvAUX(hv)->xhv_name_u.xhvnameu_name && HvAUX(hv)->xhv_name_count != -1) \ + ? HEK_KEY(HvENAME_HEK_NN(hv)) : NULL) +#define HvENAMELEN_get(hv) \ + ((SvOOK(hv) && HvAUX(hv)->xhv_name_u.xhvnameu_name && HvAUX(hv)->xhv_name_count != -1) \ + ? HEK_LEN(HvENAME_HEK_NN(hv)) : 0) +#define HvENAMEUTF8(hv) \ + ((SvOOK(hv) && HvAUX(hv)->xhv_name_u.xhvnameu_name && HvAUX(hv)->xhv_name_count != -1) \ + ? HEK_UTF8(HvENAME_HEK_NN(hv)) : 0) + +/* the number of keys (including any placeholders) */ #define XHvTOTALKEYS(xhv) ((xhv)->xhv_keys) /* * HvKEYS gets the number of keys that actually exist(), and is provided * for backwards compatibility with old XS code. The core uses HvUSEDKEYS - * (keys, excluding placeholdes) and HvTOTALKEYS (including placeholders) + * (keys, excluding placeholders) and HvTOTALKEYS (including placeholders) */ #define HvKEYS(hv) HvUSEDKEYS(hv) #define HvUSEDKEYS(hv) (HvTOTALKEYS(hv) - HvPLACEHOLDERS_get(hv)) #define HvTOTALKEYS(hv) XHvTOTALKEYS((XPVHV*) SvANY(hv)) -#define HvPLACEHOLDERS(hv) (*Perl_hv_placeholders_p(aTHX_ (HV*)hv)) -#define HvPLACEHOLDERS_get(hv) (SvMAGIC(hv) ? Perl_hv_placeholders_get(aTHX_ (HV*)hv) : 0) -#define HvPLACEHOLDERS_set(hv,p) Perl_hv_placeholders_set(aTHX_ (HV*)hv, p) +#define HvPLACEHOLDERS(hv) (*Perl_hv_placeholders_p(aTHX_ MUTABLE_HV(hv))) +#define HvPLACEHOLDERS_get(hv) (SvMAGIC(hv) ? Perl_hv_placeholders_get(aTHX_ (const HV *)hv) : 0) +#define HvPLACEHOLDERS_set(hv,p) Perl_hv_placeholders_set(aTHX_ MUTABLE_HV(hv), p) #define HvSHAREKEYS(hv) (SvFLAGS(hv) & SVphv_SHAREKEYS) #define HvSHAREKEYS_on(hv) (SvFLAGS(hv) |= SVphv_SHAREKEYS) @@ -307,11 +337,9 @@ C. #define HvLAZYDEL_on(hv) (SvFLAGS(hv) |= SVphv_LAZYDEL) #define HvLAZYDEL_off(hv) (SvFLAGS(hv) &= ~SVphv_LAZYDEL) -#define HvREHASH(hv) (SvFLAGS(hv) & SVphv_REHASH) -#define HvREHASH_on(hv) (SvFLAGS(hv) |= SVphv_REHASH) -#define HvREHASH_off(hv) (SvFLAGS(hv) &= ~SVphv_REHASH) - -#define Nullhe Null(HE*) +#ifndef PERL_CORE +# define Nullhe Null(HE*) +#endif #define HeNEXT(he) (he)->hent_next #define HeKEY_hek(he) (he)->hent_hek #define HeKEY(he) HEK_KEY(HeKEY_hek(he)) @@ -319,7 +347,6 @@ C. #define HeKLEN(he) HEK_LEN(HeKEY_hek(he)) #define HeKUTF8(he) HEK_UTF8(HeKEY_hek(he)) #define HeKWASUTF8(he) HEK_WASUTF8(HeKEY_hek(he)) -#define HeKREHASH(he) HEK_REHASH(HeKEY_hek(he)) #define HeKLEN_UTF8(he) (HeKUTF8(he) ? -HeKLEN(he) : HeKLEN(he)) #define HeKFLAGS(he) HEK_FLAGS(HeKEY_hek(he)) #define HeVAL(he) (he)->he_valu.hent_val @@ -327,6 +354,9 @@ C. #define HePV(he,lp) ((HeKLEN(he) == HEf_SVKEY) ? \ SvPV(HeKEY_sv(he),lp) : \ ((lp = HeKLEN(he)), HeKEY(he))) +#define HeUTF8(he) ((HeKLEN(he) == HEf_SVKEY) ? \ + SvUTF8(HeKEY_sv(he)) : \ + (U32)HeKUTF8(he)) #define HeSVKEY(he) ((HeKEY(he) && \ HeKLEN(he) == HEf_SVKEY) ? \ @@ -335,12 +365,14 @@ C. #define HeSVKEY_force(he) (HeKEY(he) ? \ ((HeKLEN(he) == HEf_SVKEY) ? \ HeKEY_sv(he) : \ - sv_2mortal(newSVpvn(HeKEY(he), \ - HeKLEN(he)))) : \ + newSVpvn_flags(HeKEY(he), \ + HeKLEN(he), SVs_TEMP)) : \ &PL_sv_undef) #define HeSVKEY_set(he,sv) ((HeKLEN(he) = HEf_SVKEY), (HeKEY_sv(he) = sv)) -#define Nullhek Null(HEK*) +#ifndef PERL_CORE +# define Nullhek Null(HEK*) +#endif #define HEK_BASESIZE STRUCT_OFFSET(HEK, hek_key[0]) #define HEK_HASH(hek) (hek)->hek_hash #define HEK_LEN(hek) (hek)->hek_len @@ -349,23 +381,16 @@ C. #define HVhek_UTF8 0x01 /* Key is utf8 encoded. */ #define HVhek_WASUTF8 0x02 /* Key is bytes here, but was supplied as utf8. */ -#define HVhek_REHASH 0x04 /* This key is in an hv using a custom HASH . */ #define HVhek_UNSHARED 0x08 /* This key isn't a shared hash key. */ #define HVhek_FREEKEY 0x100 /* Internal flag to say key is malloc()ed. */ #define HVhek_PLACEHOLD 0x200 /* Internal flag to create placeholder. * (may change, but Storable is a core module) */ +#define HVhek_KEYCANONICAL 0x400 /* Internal flag - key is in canonical form. + If the string is UTF-8, it cannot be + converted to bytes. */ #define HVhek_MASK 0xFF -/* Which flags enable HvHASKFLAGS? Somewhat a hack on a hack, as - HVhek_REHASH is only needed because the rehash flag has to be duplicated - into all keys as hv_iternext has no access to the hash flags. At this - point Storable's tests get upset, because sometimes hashes are "keyed" - and sometimes not, depending on the order of data insertion, and whether - it triggered rehashing. So currently HVhek_REHASH is exempt. - Similarly UNSHARED -*/ - -#define HVhek_ENABLEHVKFLAGS (HVhek_MASK & ~(HVhek_REHASH|HVhek_UNSHARED)) +#define HVhek_ENABLEHVKFLAGS (HVhek_MASK & ~(HVhek_UNSHARED)) #define HEK_UTF8(hek) (HEK_FLAGS(hek) & HVhek_UTF8) #define HEK_UTF8_on(hek) (HEK_FLAGS(hek) |= HVhek_UTF8) @@ -373,8 +398,6 @@ C. #define HEK_WASUTF8(hek) (HEK_FLAGS(hek) & HVhek_WASUTF8) #define HEK_WASUTF8_on(hek) (HEK_FLAGS(hek) |= HVhek_WASUTF8) #define HEK_WASUTF8_off(hek) (HEK_FLAGS(hek) &= ~HVhek_WASUTF8) -#define HEK_REHASH(hek) (HEK_FLAGS(hek) & HVhek_REHASH) -#define HEK_REHASH_on(hek) (HEK_FLAGS(hek) |= HVhek_REHASH) /* calculate HV array allocation */ #ifndef PERL_USE_LARGE_HV_ALLOC @@ -394,11 +417,11 @@ C. #define HV_ITERNEXT_WANTPLACEHOLDERS 0x01 /* Don't skip placeholders. */ #define hv_iternext(hv) hv_iternext_flags(hv, 0) -#define hv_magic(hv, gv, how) sv_magic((SV*)(hv), (SV*)(gv), how, NULL, 0) +#define hv_magic(hv, gv, how) sv_magic(MUTABLE_SV(hv), MUTABLE_SV(gv), how, NULL, 0) +#define hv_undef(hv) Perl_hv_undef_flags(aTHX_ hv, 0) -/* available as a function in hv.c */ -#define Perl_sharepvn(sv, len, hash) HEK_KEY(share_hek(sv, len, hash)) -#define sharepvn(sv, len, hash) Perl_sharepvn(sv, len, hash) +#define Perl_sharepvn(pv, len, hash) HEK_KEY(share_hek(pv, len, hash)) +#define sharepvn(pv, len, hash) Perl_sharepvn(pv, len, hash) #define share_hek_hek(hek) \ (++(((struct shared_he *)(((char *)hek) \ @@ -407,6 +430,43 @@ C. ->shared_he_he.he_valu.hent_refcount), \ hek) +#define hv_store_ent(hv, keysv, val, hash) \ + ((HE *) hv_common((hv), (keysv), NULL, 0, 0, HV_FETCH_ISSTORE, \ + (val), (hash))) + +#define hv_exists_ent(hv, keysv, hash) \ + (hv_common((hv), (keysv), NULL, 0, 0, HV_FETCH_ISEXISTS, 0, (hash)) \ + ? TRUE : FALSE) +#define hv_fetch_ent(hv, keysv, lval, hash) \ + ((HE *) hv_common((hv), (keysv), NULL, 0, 0, \ + ((lval) ? HV_FETCH_LVALUE : 0), NULL, (hash))) +#define hv_delete_ent(hv, key, flags, hash) \ + (MUTABLE_SV(hv_common((hv), (key), NULL, 0, 0, (flags) | HV_DELETE, \ + NULL, (hash)))) + +#define hv_store_flags(hv, key, klen, val, hash, flags) \ + ((SV**) hv_common((hv), NULL, (key), (klen), (flags), \ + (HV_FETCH_ISSTORE|HV_FETCH_JUST_SV), (val), \ + (hash))) + +#define hv_store(hv, key, klen, val, hash) \ + ((SV**) hv_common_key_len((hv), (key), (klen), \ + (HV_FETCH_ISSTORE|HV_FETCH_JUST_SV), \ + (val), (hash))) + +#define hv_exists(hv, key, klen) \ + (hv_common_key_len((hv), (key), (klen), HV_FETCH_ISEXISTS, NULL, 0) \ + ? TRUE : FALSE) + +#define hv_fetch(hv, key, klen, lval) \ + ((SV**) hv_common_key_len((hv), (key), (klen), (lval) \ + ? (HV_FETCH_JUST_SV | HV_FETCH_LVALUE) \ + : HV_FETCH_JUST_SV, NULL, 0)) + +#define hv_delete(hv, key, klen, flags) \ + (MUTABLE_SV(hv_common_key_len((hv), (key), (klen), \ + (flags) | HV_DELETE, NULL, 0))) + /* This refcounted he structure is used for storing the hints used for lexical pragmas. Without threads, it's basically struct he + refcount. With threads, life gets more complex as the structure needs to be shared @@ -415,6 +475,12 @@ C. struct refcounted_he; +/* flags for the refcounted_he API */ +#define REFCOUNTED_HE_KEY_UTF8 0x00000001 +#ifdef PERL_CORE +# define REFCOUNTED_HE_EXISTS 0x00000002 +#endif + #ifdef PERL_CORE /* Gosh. This really isn't a good name any longer. */ @@ -438,6 +504,30 @@ struct refcounted_he { char refcounted_he_data[1]; }; +/* +=for apidoc m|SV *|refcounted_he_fetch_pvs|const struct refcounted_he *chain|const char *key|U32 flags + +Like L, but takes a literal string instead of +a string/length pair, and no precomputed hash. + +=cut +*/ + +#define refcounted_he_fetch_pvs(chain, key, flags) \ + Perl_refcounted_he_fetch_pvn(aTHX_ chain, STR_WITH_LEN(key), 0, flags) + +/* +=for apidoc m|struct refcounted_he *|refcounted_he_new_pvs|struct refcounted_he *parent|const char *key|SV *value|U32 flags + +Like L, but takes a literal string instead of +a string/length pair, and no precomputed hash. + +=cut +*/ + +#define refcounted_he_new_pvs(parent, key, value, flags) \ + Perl_refcounted_he_new_pvn(aTHX_ parent, STR_WITH_LEN(key), 0, value, flags) + /* Flag bits are HVhek_UTF8, HVhek_WASUTF8, then */ #define HVrhek_undef 0x00 /* Value is undef. */ #define HVrhek_delete 0x10 /* Value is placeholder - signifies delete. */ @@ -477,18 +567,37 @@ struct refcounted_he { /* Hash actions * Passed in PERL_MAGIC_uvar calls */ -#define HV_DELETE -1 -#define HV_FETCH_ISSTORE 0x01 -#define HV_FETCH_ISEXISTS 0x02 -#define HV_FETCH_LVALUE 0x04 -#define HV_FETCH_JUST_SV 0x08 +#define HV_DISABLE_UVAR_XKEY 0x01 +/* We need to ensure that these don't clash with G_DISCARD, which is 2, as it + is documented as being passed to hv_delete(). */ +#define HV_FETCH_ISSTORE 0x04 +#define HV_FETCH_ISEXISTS 0x08 +#define HV_FETCH_LVALUE 0x10 +#define HV_FETCH_JUST_SV 0x20 +#define HV_DELETE 0x40 +#define HV_FETCH_EMPTY_HE 0x80 /* Leave HeVAL null. */ + +/* Must not conflict with HVhek_UTF8 */ +#define HV_NAME_SETALL 0x02 + +/* +=for apidoc newHV + +Creates a new HV. The reference count is set to 1. + +=cut +*/ + +#define newHV() MUTABLE_HV(newSV_type(SVt_PVHV)) + +#include "hv_func.h" /* * Local variables: * c-indentation-style: bsd * c-basic-offset: 4 - * indent-tabs-mode: t + * indent-tabs-mode: nil * End: * - * ex: set ts=8 sts=4 sw=4 noet: + * ex: set ts=8 sts=4 sw=4 et: */