Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* hv.c |
79072805 | 2 | * |
bc89e66f | 3 | * Copyright (c) 1991-2001, Larry Wall |
79072805 LW |
4 | * |
5 | * You may distribute under the terms of either the GNU General Public | |
6 | * License or the Artistic License, as specified in the README file. | |
7 | * | |
a0d0e21e LW |
8 | */ |
9 | ||
10 | /* | |
11 | * "I sit beside the fire and think of all that I have seen." --Bilbo | |
79072805 LW |
12 | */ |
13 | ||
d5afce77 RB |
14 | /* |
15 | =head1 Hash Manipulation Functions | |
16 | */ | |
17 | ||
79072805 | 18 | #include "EXTERN.h" |
864dbfa3 | 19 | #define PERL_IN_HV_C |
79072805 LW |
20 | #include "perl.h" |
21 | ||
76e3520e | 22 | STATIC HE* |
cea2e8a9 | 23 | S_new_he(pTHX) |
4633a7c4 LW |
24 | { |
25 | HE* he; | |
333f433b DG |
26 | LOCK_SV_MUTEX; |
27 | if (!PL_he_root) | |
8aacddc1 | 28 | more_he(); |
333f433b DG |
29 | he = PL_he_root; |
30 | PL_he_root = HeNEXT(he); | |
31 | UNLOCK_SV_MUTEX; | |
32 | return he; | |
4633a7c4 LW |
33 | } |
34 | ||
76e3520e | 35 | STATIC void |
cea2e8a9 | 36 | S_del_he(pTHX_ HE *p) |
4633a7c4 | 37 | { |
333f433b | 38 | LOCK_SV_MUTEX; |
3280af22 NIS |
39 | HeNEXT(p) = (HE*)PL_he_root; |
40 | PL_he_root = p; | |
333f433b | 41 | UNLOCK_SV_MUTEX; |
4633a7c4 LW |
42 | } |
43 | ||
333f433b | 44 | STATIC void |
cea2e8a9 | 45 | S_more_he(pTHX) |
4633a7c4 LW |
46 | { |
47 | register HE* he; | |
48 | register HE* heend; | |
612f20c3 GS |
49 | XPV *ptr; |
50 | New(54, ptr, 1008/sizeof(XPV), XPV); | |
51 | ptr->xpv_pv = (char*)PL_he_arenaroot; | |
52 | PL_he_arenaroot = ptr; | |
53 | ||
54 | he = (HE*)ptr; | |
4633a7c4 | 55 | heend = &he[1008 / sizeof(HE) - 1]; |
612f20c3 | 56 | PL_he_root = ++he; |
4633a7c4 | 57 | while (he < heend) { |
8aacddc1 NIS |
58 | HeNEXT(he) = (HE*)(he + 1); |
59 | he++; | |
4633a7c4 | 60 | } |
fde52b5c | 61 | HeNEXT(he) = 0; |
4633a7c4 LW |
62 | } |
63 | ||
d33b2eba GS |
64 | #ifdef PURIFY |
65 | ||
66 | #define new_HE() (HE*)safemalloc(sizeof(HE)) | |
67 | #define del_HE(p) safefree((char*)p) | |
68 | ||
69 | #else | |
70 | ||
71 | #define new_HE() new_he() | |
72 | #define del_HE(p) del_he(p) | |
73 | ||
74 | #endif | |
75 | ||
76e3520e | 76 | STATIC HEK * |
cea2e8a9 | 77 | S_save_hek(pTHX_ const char *str, I32 len, U32 hash) |
bbce6d69 | 78 | { |
79 | char *k; | |
80 | register HEK *hek; | |
da58a35d JH |
81 | bool is_utf8 = FALSE; |
82 | ||
83 | if (len < 0) { | |
84 | len = -len; | |
85 | is_utf8 = TRUE; | |
86 | } | |
1c846c1f | 87 | |
ff68c719 | 88 | New(54, k, HEK_BASESIZE + len + 1, char); |
bbce6d69 | 89 | hek = (HEK*)k; |
ff68c719 | 90 | Copy(str, HEK_KEY(hek), len, char); |
ff68c719 | 91 | HEK_LEN(hek) = len; |
92 | HEK_HASH(hek) = hash; | |
da58a35d | 93 | HEK_UTF8(hek) = (char)is_utf8; |
bbce6d69 | 94 | return hek; |
95 | } | |
96 | ||
97 | void | |
864dbfa3 | 98 | Perl_unshare_hek(pTHX_ HEK *hek) |
bbce6d69 | 99 | { |
c3654f1a IH |
100 | unsharepvn(HEK_KEY(hek),HEK_UTF8(hek)?-HEK_LEN(hek):HEK_LEN(hek), |
101 | HEK_HASH(hek)); | |
bbce6d69 | 102 | } |
103 | ||
d18c6117 GS |
104 | #if defined(USE_ITHREADS) |
105 | HE * | |
a8fc9800 | 106 | Perl_he_dup(pTHX_ HE *e, bool shared, CLONE_PARAMS* param) |
d18c6117 GS |
107 | { |
108 | HE *ret; | |
109 | ||
110 | if (!e) | |
111 | return Nullhe; | |
7766f137 GS |
112 | /* look for it in the table first */ |
113 | ret = (HE*)ptr_table_fetch(PL_ptr_table, e); | |
114 | if (ret) | |
115 | return ret; | |
116 | ||
117 | /* create anew and remember what it is */ | |
d33b2eba | 118 | ret = new_HE(); |
7766f137 GS |
119 | ptr_table_store(PL_ptr_table, e, ret); |
120 | ||
d2d73c3e | 121 | HeNEXT(ret) = he_dup(HeNEXT(e),shared, param); |
d18c6117 | 122 | if (HeKLEN(e) == HEf_SVKEY) |
d2d73c3e | 123 | HeKEY_sv(ret) = SvREFCNT_inc(sv_dup(HeKEY_sv(e), param)); |
d18c6117 | 124 | else if (shared) |
c3654f1a | 125 | HeKEY_hek(ret) = share_hek(HeKEY(e), HeKLEN_UTF8(e), HeHASH(e)); |
d18c6117 | 126 | else |
c3654f1a | 127 | HeKEY_hek(ret) = save_hek(HeKEY(e), HeKLEN_UTF8(e), HeHASH(e)); |
d2d73c3e | 128 | HeVAL(ret) = SvREFCNT_inc(sv_dup(HeVAL(e), param)); |
d18c6117 GS |
129 | return ret; |
130 | } | |
131 | #endif /* USE_ITHREADS */ | |
132 | ||
1b1f1335 NIS |
133 | static void |
134 | Perl_hv_notallowed(pTHX_ bool is_utf8, const char *key, I32 klen, | |
135 | const char *keysave) | |
136 | { | |
137 | SV *sv = sv_newmortal(); | |
138 | if (key == keysave) { | |
139 | sv_setpvn(sv, key, klen); | |
140 | } | |
141 | else { | |
142 | /* Need to free saved eventually assign to mortal SV */ | |
143 | SV *sv = sv_newmortal(); | |
144 | sv_usepvn(sv, (char *) key, klen); | |
145 | } | |
146 | if (is_utf8) { | |
147 | SvUTF8_on(sv); | |
148 | } | |
d5afce77 | 149 | Perl_croak(aTHX_ "Attempt to access to key '%"SVf"' in fixed hash",sv); |
1b1f1335 NIS |
150 | } |
151 | ||
fde52b5c | 152 | /* (klen == HEf_SVKEY) is special for MAGICAL hv entries, meaning key slot |
153 | * contains an SV* */ | |
154 | ||
954c1994 GS |
155 | /* |
156 | =for apidoc hv_fetch | |
157 | ||
158 | Returns the SV which corresponds to the specified key in the hash. The | |
159 | C<klen> is the length of the key. If C<lval> is set then the fetch will be | |
160 | part of a store. Check that the return value is non-null before | |
d1be9408 | 161 | dereferencing it to an C<SV*>. |
954c1994 | 162 | |
96f1132b | 163 | See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for more |
954c1994 GS |
164 | information on how to use this function on tied hashes. |
165 | ||
166 | =cut | |
167 | */ | |
168 | ||
79072805 | 169 | SV** |
da58a35d | 170 | Perl_hv_fetch(pTHX_ HV *hv, const char *key, I32 klen, I32 lval) |
79072805 | 171 | { |
cbec9347 | 172 | register XPVHV* xhv; |
fde52b5c | 173 | register U32 hash; |
79072805 | 174 | register HE *entry; |
79072805 | 175 | SV *sv; |
da58a35d | 176 | bool is_utf8 = FALSE; |
f9a63242 | 177 | const char *keysave = key; |
79072805 LW |
178 | |
179 | if (!hv) | |
180 | return 0; | |
463ee0b2 | 181 | |
da58a35d JH |
182 | if (klen < 0) { |
183 | klen = -klen; | |
184 | is_utf8 = TRUE; | |
185 | } | |
186 | ||
8990e307 | 187 | if (SvRMAGICAL(hv)) { |
14befaf4 | 188 | if (mg_find((SV*)hv, PERL_MAGIC_tied) || SvGMAGICAL((SV*)hv)) { |
8990e307 | 189 | sv = sv_newmortal(); |
463ee0b2 | 190 | mg_copy((SV*)hv, sv, key, klen); |
3280af22 NIS |
191 | PL_hv_fetch_sv = sv; |
192 | return &PL_hv_fetch_sv; | |
463ee0b2 | 193 | } |
902173a3 | 194 | #ifdef ENV_IS_CASELESS |
14befaf4 | 195 | else if (mg_find((SV*)hv, PERL_MAGIC_env)) { |
e7152ba2 GS |
196 | U32 i; |
197 | for (i = 0; i < klen; ++i) | |
198 | if (isLOWER(key[i])) { | |
79cb57f6 | 199 | char *nkey = strupr(SvPVX(sv_2mortal(newSVpvn(key,klen)))); |
e7152ba2 GS |
200 | SV **ret = hv_fetch(hv, nkey, klen, 0); |
201 | if (!ret && lval) | |
202 | ret = hv_store(hv, key, klen, NEWSV(61,0), 0); | |
203 | return ret; | |
204 | } | |
902173a3 GS |
205 | } |
206 | #endif | |
463ee0b2 LW |
207 | } |
208 | ||
cbec9347 JH |
209 | /* We use xhv->xhv_foo fields directly instead of HvFOO(hv) to |
210 | avoid unnecessary pointer dereferencing. */ | |
211 | xhv = (XPVHV*)SvANY(hv); | |
212 | if (!xhv->xhv_array /* !HvARRAY(hv) */) { | |
1c846c1f | 213 | if (lval |
a0d0e21e | 214 | #ifdef DYNAMIC_ENV_FETCH /* if it's an %ENV lookup, we may get it on the fly */ |
8aacddc1 | 215 | || (SvRMAGICAL((SV*)hv) && mg_find((SV*)hv, PERL_MAGIC_env)) |
a0d0e21e | 216 | #endif |
8aacddc1 | 217 | ) |
cbec9347 JH |
218 | Newz(503, xhv->xhv_array /* HvARRAY(hv) */, |
219 | PERL_HV_ARRAY_ALLOC_BYTES(xhv->xhv_max+1 /* HvMAX(hv)+1 */), | |
220 | char); | |
79072805 LW |
221 | else |
222 | return 0; | |
223 | } | |
224 | ||
77caf834 | 225 | if (is_utf8) { |
75a54232 JH |
226 | STRLEN tmplen = klen; |
227 | /* Just casting the &klen to (STRLEN) won't work well | |
228 | * if STRLEN and I32 are of different widths. --jhi */ | |
229 | key = (char*)bytes_from_utf8((U8*)key, &tmplen, &is_utf8); | |
230 | klen = tmplen; | |
231 | } | |
f9a63242 | 232 | |
fde52b5c | 233 | PERL_HASH(hash, key, klen); |
79072805 | 234 | |
cbec9347 JH |
235 | /* entry = (HvARRAY(hv))[hash & (I32) HvMAX(hv)]; */ |
236 | entry = ((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; | |
fde52b5c | 237 | for (; entry; entry = HeNEXT(entry)) { |
238 | if (HeHASH(entry) != hash) /* strings can't be equal */ | |
79072805 | 239 | continue; |
fde52b5c | 240 | if (HeKLEN(entry) != klen) |
79072805 | 241 | continue; |
1c846c1f | 242 | if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */ |
79072805 | 243 | continue; |
c3654f1a IH |
244 | if (HeKUTF8(entry) != (char)is_utf8) |
245 | continue; | |
f9a63242 JH |
246 | if (key != keysave) |
247 | Safefree(key); | |
8aacddc1 NIS |
248 | /* if we find a placeholder, we pretend we haven't found anything */ |
249 | if (HeVAL(entry) == &PL_sv_undef) | |
250 | break; | |
fde52b5c | 251 | return &HeVAL(entry); |
8aacddc1 | 252 | |
79072805 | 253 | } |
a0d0e21e | 254 | #ifdef DYNAMIC_ENV_FETCH /* %ENV lookup? If so, try to fetch the value now */ |
cbec9347 | 255 | if (SvRMAGICAL((SV*)hv) && mg_find((SV*)hv, PERL_MAGIC_env)) { |
a6c40364 GS |
256 | unsigned long len; |
257 | char *env = PerlEnv_ENVgetenv_len(key,&len); | |
258 | if (env) { | |
259 | sv = newSVpvn(env,len); | |
260 | SvTAINTED_on(sv); | |
f9a63242 JH |
261 | if (key != keysave) |
262 | Safefree(key); | |
a6c40364 GS |
263 | return hv_store(hv,key,klen,sv,hash); |
264 | } | |
a0d0e21e LW |
265 | } |
266 | #endif | |
8aacddc1 | 267 | if (!entry && SvREADONLY(hv)) { |
1b1f1335 NIS |
268 | Perl_hv_notallowed(aTHX_ is_utf8, key, klen, keysave); |
269 | } | |
79072805 LW |
270 | if (lval) { /* gonna assign to this, so it better be there */ |
271 | sv = NEWSV(61,0); | |
f9a63242 JH |
272 | if (key != keysave) { /* must be is_utf8 == 0 */ |
273 | SV **ret = hv_store(hv,key,klen,sv,hash); | |
274 | Safefree(key); | |
275 | return ret; | |
276 | } | |
277 | else | |
278 | return hv_store(hv,key,is_utf8?-klen:klen,sv,hash); | |
79072805 | 279 | } |
f9a63242 JH |
280 | if (key != keysave) |
281 | Safefree(key); | |
79072805 LW |
282 | return 0; |
283 | } | |
284 | ||
d1be9408 | 285 | /* returns an HE * structure with the all fields set */ |
fde52b5c | 286 | /* note that hent_val will be a mortal sv for MAGICAL hashes */ |
954c1994 GS |
287 | /* |
288 | =for apidoc hv_fetch_ent | |
289 | ||
290 | Returns the hash entry which corresponds to the specified key in the hash. | |
291 | C<hash> must be a valid precomputed hash number for the given C<key>, or 0 | |
292 | if you want the function to compute it. IF C<lval> is set then the fetch | |
293 | will be part of a store. Make sure the return value is non-null before | |
294 | accessing it. The return value when C<tb> is a tied hash is a pointer to a | |
295 | static location, so be sure to make a copy of the structure if you need to | |
1c846c1f | 296 | store it somewhere. |
954c1994 | 297 | |
96f1132b | 298 | See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for more |
954c1994 GS |
299 | information on how to use this function on tied hashes. |
300 | ||
301 | =cut | |
302 | */ | |
303 | ||
fde52b5c | 304 | HE * |
864dbfa3 | 305 | Perl_hv_fetch_ent(pTHX_ HV *hv, SV *keysv, I32 lval, register U32 hash) |
fde52b5c | 306 | { |
cbec9347 | 307 | register XPVHV* xhv; |
fde52b5c | 308 | register char *key; |
309 | STRLEN klen; | |
310 | register HE *entry; | |
311 | SV *sv; | |
da58a35d | 312 | bool is_utf8; |
f9a63242 | 313 | char *keysave; |
fde52b5c | 314 | |
315 | if (!hv) | |
316 | return 0; | |
317 | ||
902173a3 | 318 | if (SvRMAGICAL(hv)) { |
14befaf4 | 319 | if (mg_find((SV*)hv, PERL_MAGIC_tied) || SvGMAGICAL((SV*)hv)) { |
902173a3 GS |
320 | sv = sv_newmortal(); |
321 | keysv = sv_2mortal(newSVsv(keysv)); | |
322 | mg_copy((SV*)hv, sv, (char*)keysv, HEf_SVKEY); | |
3280af22 | 323 | if (!HeKEY_hek(&PL_hv_fetch_ent_mh)) { |
902173a3 GS |
324 | char *k; |
325 | New(54, k, HEK_BASESIZE + sizeof(SV*), char); | |
3280af22 | 326 | HeKEY_hek(&PL_hv_fetch_ent_mh) = (HEK*)k; |
902173a3 | 327 | } |
3280af22 NIS |
328 | HeSVKEY_set(&PL_hv_fetch_ent_mh, keysv); |
329 | HeVAL(&PL_hv_fetch_ent_mh) = sv; | |
330 | return &PL_hv_fetch_ent_mh; | |
1cf368ac | 331 | } |
902173a3 | 332 | #ifdef ENV_IS_CASELESS |
14befaf4 | 333 | else if (mg_find((SV*)hv, PERL_MAGIC_env)) { |
e7152ba2 | 334 | U32 i; |
902173a3 | 335 | key = SvPV(keysv, klen); |
e7152ba2 GS |
336 | for (i = 0; i < klen; ++i) |
337 | if (isLOWER(key[i])) { | |
79cb57f6 | 338 | SV *nkeysv = sv_2mortal(newSVpvn(key,klen)); |
e7152ba2 GS |
339 | (void)strupr(SvPVX(nkeysv)); |
340 | entry = hv_fetch_ent(hv, nkeysv, 0, 0); | |
341 | if (!entry && lval) | |
342 | entry = hv_store_ent(hv, keysv, NEWSV(61,0), hash); | |
343 | return entry; | |
344 | } | |
902173a3 GS |
345 | } |
346 | #endif | |
fde52b5c | 347 | } |
348 | ||
cbec9347 JH |
349 | xhv = (XPVHV*)SvANY(hv); |
350 | if (!xhv->xhv_array /* !HvARRAY(hv) */) { | |
1c846c1f | 351 | if (lval |
fde52b5c | 352 | #ifdef DYNAMIC_ENV_FETCH /* if it's an %ENV lookup, we may get it on the fly */ |
8aacddc1 | 353 | || (SvRMAGICAL((SV*)hv) && mg_find((SV*)hv, PERL_MAGIC_env)) |
fde52b5c | 354 | #endif |
8aacddc1 | 355 | ) |
cbec9347 JH |
356 | Newz(503, xhv->xhv_array /* HvARRAY(hv) */, |
357 | PERL_HV_ARRAY_ALLOC_BYTES(xhv->xhv_max+1 /* HvMAX(hv)+1 */), | |
358 | char); | |
fde52b5c | 359 | else |
360 | return 0; | |
361 | } | |
362 | ||
f9a63242 | 363 | keysave = key = SvPV(keysv, klen); |
da58a35d | 364 | is_utf8 = (SvUTF8(keysv)!=0); |
1c846c1f | 365 | |
77caf834 | 366 | if (is_utf8) |
f9a63242 JH |
367 | key = (char*)bytes_from_utf8((U8*)key, &klen, &is_utf8); |
368 | ||
effa1e2d | 369 | if (!hash) |
370 | PERL_HASH(hash, key, klen); | |
371 | ||
cbec9347 JH |
372 | /* entry = (HvARRAY(hv))[hash & (I32) HvMAX(hv)]; */ |
373 | entry = ((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; | |
fde52b5c | 374 | for (; entry; entry = HeNEXT(entry)) { |
375 | if (HeHASH(entry) != hash) /* strings can't be equal */ | |
376 | continue; | |
377 | if (HeKLEN(entry) != klen) | |
378 | continue; | |
1c846c1f | 379 | if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */ |
fde52b5c | 380 | continue; |
c3654f1a IH |
381 | if (HeKUTF8(entry) != (char)is_utf8) |
382 | continue; | |
f9a63242 JH |
383 | if (key != keysave) |
384 | Safefree(key); | |
8aacddc1 NIS |
385 | /* if we find a placeholder, we pretend we haven't found anything */ |
386 | if (HeVAL(entry) == &PL_sv_undef) | |
387 | break; | |
fde52b5c | 388 | return entry; |
389 | } | |
390 | #ifdef DYNAMIC_ENV_FETCH /* %ENV lookup? If so, try to fetch the value now */ | |
cbec9347 | 391 | if (SvRMAGICAL((SV*)hv) && mg_find((SV*)hv, PERL_MAGIC_env)) { |
a6c40364 GS |
392 | unsigned long len; |
393 | char *env = PerlEnv_ENVgetenv_len(key,&len); | |
394 | if (env) { | |
395 | sv = newSVpvn(env,len); | |
396 | SvTAINTED_on(sv); | |
397 | return hv_store_ent(hv,keysv,sv,hash); | |
398 | } | |
fde52b5c | 399 | } |
400 | #endif | |
8aacddc1 | 401 | if (!entry && SvREADONLY(hv)) { |
1b1f1335 NIS |
402 | Perl_hv_notallowed(aTHX_ is_utf8, key, klen, keysave); |
403 | } | |
f9a63242 JH |
404 | if (key != keysave) |
405 | Safefree(key); | |
fde52b5c | 406 | if (lval) { /* gonna assign to this, so it better be there */ |
407 | sv = NEWSV(61,0); | |
e7152ba2 | 408 | return hv_store_ent(hv,keysv,sv,hash); |
fde52b5c | 409 | } |
410 | return 0; | |
411 | } | |
412 | ||
864dbfa3 | 413 | STATIC void |
cea2e8a9 | 414 | S_hv_magic_check(pTHX_ HV *hv, bool *needs_copy, bool *needs_store) |
d0066dc7 OT |
415 | { |
416 | MAGIC *mg = SvMAGIC(hv); | |
417 | *needs_copy = FALSE; | |
418 | *needs_store = TRUE; | |
419 | while (mg) { | |
420 | if (isUPPER(mg->mg_type)) { | |
421 | *needs_copy = TRUE; | |
422 | switch (mg->mg_type) { | |
14befaf4 DM |
423 | case PERL_MAGIC_tied: |
424 | case PERL_MAGIC_sig: | |
d0066dc7 | 425 | *needs_store = FALSE; |
d0066dc7 OT |
426 | } |
427 | } | |
428 | mg = mg->mg_moremagic; | |
429 | } | |
430 | } | |
431 | ||
954c1994 GS |
432 | /* |
433 | =for apidoc hv_store | |
434 | ||
435 | Stores an SV in a hash. The hash key is specified as C<key> and C<klen> is | |
436 | the length of the key. The C<hash> parameter is the precomputed hash | |
437 | value; if it is zero then Perl will compute it. The return value will be | |
438 | NULL if the operation failed or if the value did not need to be actually | |
439 | stored within the hash (as in the case of tied hashes). Otherwise it can | |
440 | be dereferenced to get the original C<SV*>. Note that the caller is | |
441 | responsible for suitably incrementing the reference count of C<val> before | |
1c846c1f | 442 | the call, and decrementing it if the function returned NULL. |
954c1994 | 443 | |
96f1132b | 444 | See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for more |
954c1994 GS |
445 | information on how to use this function on tied hashes. |
446 | ||
447 | =cut | |
448 | */ | |
449 | ||
79072805 | 450 | SV** |
da58a35d | 451 | Perl_hv_store(pTHX_ HV *hv, const char *key, I32 klen, SV *val, register U32 hash) |
79072805 | 452 | { |
cbec9347 | 453 | register XPVHV* xhv; |
79072805 LW |
454 | register I32 i; |
455 | register HE *entry; | |
456 | register HE **oentry; | |
da58a35d | 457 | bool is_utf8 = FALSE; |
f9a63242 | 458 | const char *keysave = key; |
79072805 LW |
459 | |
460 | if (!hv) | |
461 | return 0; | |
462 | ||
da58a35d JH |
463 | if (klen < 0) { |
464 | klen = -klen; | |
465 | is_utf8 = TRUE; | |
466 | } | |
467 | ||
cbec9347 | 468 | xhv = (XPVHV*)SvANY(hv); |
463ee0b2 | 469 | if (SvMAGICAL(hv)) { |
d0066dc7 OT |
470 | bool needs_copy; |
471 | bool needs_store; | |
472 | hv_magic_check (hv, &needs_copy, &needs_store); | |
473 | if (needs_copy) { | |
474 | mg_copy((SV*)hv, val, key, klen); | |
cbec9347 | 475 | if (!xhv->xhv_array /* !HvARRAY */ && !needs_store) |
d0066dc7 | 476 | return 0; |
902173a3 | 477 | #ifdef ENV_IS_CASELESS |
14befaf4 | 478 | else if (mg_find((SV*)hv, PERL_MAGIC_env)) { |
8aacddc1 | 479 | key = savepvn(key,klen); |
25716404 | 480 | key = (const char*)strupr((char*)key); |
902173a3 GS |
481 | hash = 0; |
482 | } | |
483 | #endif | |
d0066dc7 | 484 | } |
463ee0b2 | 485 | } |
77caf834 | 486 | if (is_utf8) { |
75a54232 JH |
487 | STRLEN tmplen = klen; |
488 | /* See the note in hv_fetch(). --jhi */ | |
489 | key = (char*)bytes_from_utf8((U8*)key, &tmplen, &is_utf8); | |
490 | klen = tmplen; | |
491 | } | |
f9a63242 | 492 | |
fde52b5c | 493 | if (!hash) |
494 | PERL_HASH(hash, key, klen); | |
495 | ||
cbec9347 JH |
496 | if (!xhv->xhv_array /* !HvARRAY(hv) */) |
497 | Newz(505, xhv->xhv_array /* HvARRAY(hv) */, | |
498 | PERL_HV_ARRAY_ALLOC_BYTES(xhv->xhv_max+1 /* HvMAX(hv)+1 */), | |
499 | char); | |
fde52b5c | 500 | |
cbec9347 JH |
501 | /* oentry = &(HvARRAY(hv))[hash & (I32) HvMAX(hv)]; */ |
502 | oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; | |
fde52b5c | 503 | i = 1; |
504 | ||
505 | for (entry = *oentry; entry; i=0, entry = HeNEXT(entry)) { | |
506 | if (HeHASH(entry) != hash) /* strings can't be equal */ | |
507 | continue; | |
508 | if (HeKLEN(entry) != klen) | |
509 | continue; | |
1c846c1f | 510 | if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */ |
fde52b5c | 511 | continue; |
c3654f1a IH |
512 | if (HeKUTF8(entry) != (char)is_utf8) |
513 | continue; | |
8aacddc1 NIS |
514 | if (HeVAL(entry) == &PL_sv_undef) |
515 | xhv->xhv_placeholders--; /* yes, can store into placeholder slot */ | |
516 | else | |
517 | SvREFCNT_dec(HeVAL(entry)); | |
fde52b5c | 518 | HeVAL(entry) = val; |
f9a63242 JH |
519 | if (key != keysave) |
520 | Safefree(key); | |
fde52b5c | 521 | return &HeVAL(entry); |
522 | } | |
523 | ||
1b1f1335 NIS |
524 | if (SvREADONLY(hv)) { |
525 | Perl_hv_notallowed(aTHX_ is_utf8, key, klen, keysave); | |
526 | } | |
527 | ||
d33b2eba | 528 | entry = new_HE(); |
fde52b5c | 529 | if (HvSHAREKEYS(hv)) |
c3654f1a | 530 | HeKEY_hek(entry) = share_hek(key, is_utf8?-klen:klen, hash); |
fde52b5c | 531 | else /* gotta do the real thing */ |
c3654f1a | 532 | HeKEY_hek(entry) = save_hek(key, is_utf8?-klen:klen, hash); |
f9a63242 JH |
533 | if (key != keysave) |
534 | Safefree(key); | |
fde52b5c | 535 | HeVAL(entry) = val; |
fde52b5c | 536 | HeNEXT(entry) = *oentry; |
537 | *oentry = entry; | |
538 | ||
cbec9347 | 539 | xhv->xhv_keys++; /* HvKEYS(hv)++ */ |
fde52b5c | 540 | if (i) { /* initial entry? */ |
cbec9347 JH |
541 | xhv->xhv_fill++; /* HvFILL(hv)++ */ |
542 | if (xhv->xhv_keys > xhv->xhv_max /* HvKEYS(hv) > HvMAX(hv) */) | |
fde52b5c | 543 | hsplit(hv); |
79072805 LW |
544 | } |
545 | ||
fde52b5c | 546 | return &HeVAL(entry); |
547 | } | |
548 | ||
954c1994 GS |
549 | /* |
550 | =for apidoc hv_store_ent | |
551 | ||
552 | Stores C<val> in a hash. The hash key is specified as C<key>. The C<hash> | |
553 | parameter is the precomputed hash value; if it is zero then Perl will | |
554 | compute it. The return value is the new hash entry so created. It will be | |
555 | NULL if the operation failed or if the value did not need to be actually | |
556 | stored within the hash (as in the case of tied hashes). Otherwise the | |
87324b0f | 557 | contents of the return value can be accessed using the C<He?> macros |
954c1994 GS |
558 | described here. Note that the caller is responsible for suitably |
559 | incrementing the reference count of C<val> before the call, and | |
1c846c1f | 560 | decrementing it if the function returned NULL. |
954c1994 | 561 | |
96f1132b | 562 | See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for more |
954c1994 GS |
563 | information on how to use this function on tied hashes. |
564 | ||
565 | =cut | |
566 | */ | |
567 | ||
fde52b5c | 568 | HE * |
864dbfa3 | 569 | Perl_hv_store_ent(pTHX_ HV *hv, SV *keysv, SV *val, register U32 hash) |
fde52b5c | 570 | { |
cbec9347 | 571 | register XPVHV* xhv; |
fde52b5c | 572 | register char *key; |
573 | STRLEN klen; | |
574 | register I32 i; | |
575 | register HE *entry; | |
576 | register HE **oentry; | |
da58a35d | 577 | bool is_utf8; |
f9a63242 | 578 | char *keysave; |
fde52b5c | 579 | |
580 | if (!hv) | |
581 | return 0; | |
582 | ||
cbec9347 | 583 | xhv = (XPVHV*)SvANY(hv); |
fde52b5c | 584 | if (SvMAGICAL(hv)) { |
8aacddc1 NIS |
585 | bool needs_copy; |
586 | bool needs_store; | |
587 | hv_magic_check (hv, &needs_copy, &needs_store); | |
588 | if (needs_copy) { | |
589 | bool save_taint = PL_tainted; | |
590 | if (PL_tainting) | |
591 | PL_tainted = SvTAINTED(keysv); | |
592 | keysv = sv_2mortal(newSVsv(keysv)); | |
593 | mg_copy((SV*)hv, val, (char*)keysv, HEf_SVKEY); | |
594 | TAINT_IF(save_taint); | |
595 | if (!xhv->xhv_array /* !HvARRAY(hv) */ && !needs_store) | |
596 | return Nullhe; | |
902173a3 | 597 | #ifdef ENV_IS_CASELESS |
14befaf4 | 598 | else if (mg_find((SV*)hv, PERL_MAGIC_env)) { |
902173a3 | 599 | key = SvPV(keysv, klen); |
79cb57f6 | 600 | keysv = sv_2mortal(newSVpvn(key,klen)); |
902173a3 GS |
601 | (void)strupr(SvPVX(keysv)); |
602 | hash = 0; | |
603 | } | |
604 | #endif | |
605 | } | |
fde52b5c | 606 | } |
607 | ||
f9a63242 | 608 | keysave = key = SvPV(keysv, klen); |
da58a35d | 609 | is_utf8 = (SvUTF8(keysv) != 0); |
902173a3 | 610 | |
77caf834 | 611 | if (is_utf8) |
f9a63242 JH |
612 | key = (char*)bytes_from_utf8((U8*)key, &klen, &is_utf8); |
613 | ||
fde52b5c | 614 | if (!hash) |
615 | PERL_HASH(hash, key, klen); | |
616 | ||
cbec9347 JH |
617 | if (!xhv->xhv_array /* !HvARRAY(hv) */) |
618 | Newz(505, xhv->xhv_array /* HvARRAY(hv) */, | |
619 | PERL_HV_ARRAY_ALLOC_BYTES(xhv->xhv_max+1 /* HvMAX(hv)+1 */), | |
620 | char); | |
79072805 | 621 | |
cbec9347 JH |
622 | /* oentry = &(HvARRAY(hv))[hash & (I32) HvMAX(hv)]; */ |
623 | oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; | |
79072805 LW |
624 | i = 1; |
625 | ||
fde52b5c | 626 | for (entry = *oentry; entry; i=0, entry = HeNEXT(entry)) { |
627 | if (HeHASH(entry) != hash) /* strings can't be equal */ | |
79072805 | 628 | continue; |
fde52b5c | 629 | if (HeKLEN(entry) != klen) |
79072805 | 630 | continue; |
1c846c1f | 631 | if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */ |
79072805 | 632 | continue; |
c3654f1a IH |
633 | if (HeKUTF8(entry) != (char)is_utf8) |
634 | continue; | |
8aacddc1 NIS |
635 | if (HeVAL(entry) == &PL_sv_undef) |
636 | xhv->xhv_placeholders--; /* yes, can store into placeholder slot */ | |
637 | else | |
638 | SvREFCNT_dec(HeVAL(entry)); | |
fde52b5c | 639 | HeVAL(entry) = val; |
f9a63242 JH |
640 | if (key != keysave) |
641 | Safefree(key); | |
fde52b5c | 642 | return entry; |
79072805 | 643 | } |
79072805 | 644 | |
1b1f1335 NIS |
645 | if (SvREADONLY(hv)) { |
646 | Perl_hv_notallowed(aTHX_ is_utf8, key, klen, keysave); | |
647 | } | |
648 | ||
d33b2eba | 649 | entry = new_HE(); |
fde52b5c | 650 | if (HvSHAREKEYS(hv)) |
25716404 | 651 | HeKEY_hek(entry) = share_hek(key, is_utf8?-(I32)klen:klen, hash); |
fde52b5c | 652 | else /* gotta do the real thing */ |
25716404 | 653 | HeKEY_hek(entry) = save_hek(key, is_utf8?-(I32)klen:klen, hash); |
f9a63242 JH |
654 | if (key != keysave) |
655 | Safefree(key); | |
fde52b5c | 656 | HeVAL(entry) = val; |
fde52b5c | 657 | HeNEXT(entry) = *oentry; |
79072805 LW |
658 | *oentry = entry; |
659 | ||
cbec9347 | 660 | xhv->xhv_keys++; /* HvKEYS(hv)++ */ |
79072805 | 661 | if (i) { /* initial entry? */ |
cbec9347 JH |
662 | xhv->xhv_fill++; /* HvFILL(hv)++ */ |
663 | if (xhv->xhv_keys > xhv->xhv_max /* HvKEYS(hv) > HvMAX(hv) */) | |
79072805 LW |
664 | hsplit(hv); |
665 | } | |
79072805 | 666 | |
fde52b5c | 667 | return entry; |
79072805 LW |
668 | } |
669 | ||
954c1994 GS |
670 | /* |
671 | =for apidoc hv_delete | |
672 | ||
673 | Deletes a key/value pair in the hash. The value SV is removed from the | |
1c846c1f | 674 | hash and returned to the caller. The C<klen> is the length of the key. |
954c1994 GS |
675 | The C<flags> value will normally be zero; if set to G_DISCARD then NULL |
676 | will be returned. | |
677 | ||
678 | =cut | |
679 | */ | |
680 | ||
79072805 | 681 | SV * |
da58a35d | 682 | Perl_hv_delete(pTHX_ HV *hv, const char *key, I32 klen, I32 flags) |
79072805 | 683 | { |
cbec9347 | 684 | register XPVHV* xhv; |
79072805 | 685 | register I32 i; |
fde52b5c | 686 | register U32 hash; |
79072805 LW |
687 | register HE *entry; |
688 | register HE **oentry; | |
67a38de0 | 689 | SV **svp; |
79072805 | 690 | SV *sv; |
da58a35d | 691 | bool is_utf8 = FALSE; |
f9a63242 | 692 | const char *keysave = key; |
79072805 LW |
693 | |
694 | if (!hv) | |
695 | return Nullsv; | |
da58a35d JH |
696 | if (klen < 0) { |
697 | klen = -klen; | |
698 | is_utf8 = TRUE; | |
699 | } | |
8990e307 | 700 | if (SvRMAGICAL(hv)) { |
0a0bb7c7 OT |
701 | bool needs_copy; |
702 | bool needs_store; | |
703 | hv_magic_check (hv, &needs_copy, &needs_store); | |
704 | ||
67a38de0 NIS |
705 | if (needs_copy && (svp = hv_fetch(hv, key, klen, TRUE))) { |
706 | sv = *svp; | |
0a0bb7c7 OT |
707 | mg_clear(sv); |
708 | if (!needs_store) { | |
14befaf4 DM |
709 | if (mg_find(sv, PERL_MAGIC_tiedelem)) { |
710 | /* No longer an element */ | |
711 | sv_unmagic(sv, PERL_MAGIC_tiedelem); | |
0a0bb7c7 OT |
712 | return sv; |
713 | } | |
714 | return Nullsv; /* element cannot be deleted */ | |
715 | } | |
902173a3 | 716 | #ifdef ENV_IS_CASELESS |
14befaf4 | 717 | else if (mg_find((SV*)hv, PERL_MAGIC_env)) { |
79cb57f6 | 718 | sv = sv_2mortal(newSVpvn(key,klen)); |
2fd1c6b8 GS |
719 | key = strupr(SvPVX(sv)); |
720 | } | |
902173a3 | 721 | #endif |
8aacddc1 | 722 | } |
463ee0b2 | 723 | } |
cbec9347 JH |
724 | xhv = (XPVHV*)SvANY(hv); |
725 | if (!xhv->xhv_array /* !HvARRAY(hv) */) | |
79072805 | 726 | return Nullsv; |
fde52b5c | 727 | |
77caf834 | 728 | if (is_utf8) { |
75a54232 JH |
729 | STRLEN tmplen = klen; |
730 | /* See the note in hv_fetch(). --jhi */ | |
731 | key = (char*)bytes_from_utf8((U8*)key, &tmplen, &is_utf8); | |
732 | klen = tmplen; | |
733 | } | |
f9a63242 | 734 | |
fde52b5c | 735 | PERL_HASH(hash, key, klen); |
79072805 | 736 | |
cbec9347 JH |
737 | /* oentry = &(HvARRAY(hv))[hash & (I32) HvMAX(hv)]; */ |
738 | oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; | |
79072805 LW |
739 | entry = *oentry; |
740 | i = 1; | |
fde52b5c | 741 | for (; entry; i=0, oentry = &HeNEXT(entry), entry = *oentry) { |
742 | if (HeHASH(entry) != hash) /* strings can't be equal */ | |
79072805 | 743 | continue; |
fde52b5c | 744 | if (HeKLEN(entry) != klen) |
79072805 | 745 | continue; |
1c846c1f | 746 | if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */ |
79072805 | 747 | continue; |
c3654f1a IH |
748 | if (HeKUTF8(entry) != (char)is_utf8) |
749 | continue; | |
f9a63242 JH |
750 | if (key != keysave) |
751 | Safefree(key); | |
8aacddc1 NIS |
752 | /* if placeholder is here, it's already been deleted.... */ |
753 | if (HeVAL(entry) == &PL_sv_undef) | |
754 | { | |
755 | if (SvREADONLY(hv)) | |
756 | return Nullsv; /* if still SvREADONLY, leave it deleted. */ | |
757 | else { | |
758 | /* okay, really delete the placeholder... */ | |
759 | *oentry = HeNEXT(entry); | |
760 | if (i && !*oentry) | |
761 | xhv->xhv_fill--; /* HvFILL(hv)-- */ | |
762 | if (entry == xhv->xhv_eiter /* HvEITER(hv) */) | |
763 | HvLAZYDEL_on(hv); | |
764 | else | |
765 | hv_free_ent(hv, entry); | |
766 | xhv->xhv_keys--; /* HvKEYS(hv)-- */ | |
767 | xhv->xhv_placeholders--; | |
768 | return Nullsv; | |
769 | } | |
770 | } | |
771 | else if (SvREADONLY(hv) && HeVAL(entry) && SvREADONLY(HeVAL(entry))) { | |
772 | Perl_hv_notallowed(aTHX_ is_utf8, key, klen, keysave); | |
773 | } | |
774 | ||
748a9306 LW |
775 | if (flags & G_DISCARD) |
776 | sv = Nullsv; | |
94f7643d | 777 | else { |
79d01fbf | 778 | sv = sv_2mortal(HeVAL(entry)); |
94f7643d GS |
779 | HeVAL(entry) = &PL_sv_undef; |
780 | } | |
8aacddc1 NIS |
781 | |
782 | /* | |
783 | * If a restricted hash, rather than really deleting the entry, put | |
784 | * a placeholder there. This marks the key as being "approved", so | |
785 | * we can still access via not-really-existing key without raising | |
786 | * an error. | |
787 | */ | |
788 | if (SvREADONLY(hv)) { | |
789 | HeVAL(entry) = &PL_sv_undef; | |
790 | /* We'll be saving this slot, so the number of allocated keys | |
791 | * doesn't go down, but the number placeholders goes up */ | |
792 | xhv->xhv_placeholders++; /* HvPLACEHOLDERS(hv)++ */ | |
793 | } else { | |
a26e96df NIS |
794 | *oentry = HeNEXT(entry); |
795 | if (i && !*oentry) | |
796 | xhv->xhv_fill--; /* HvFILL(hv)-- */ | |
8aacddc1 NIS |
797 | if (entry == xhv->xhv_eiter /* HvEITER(hv) */) |
798 | HvLAZYDEL_on(hv); | |
799 | else | |
800 | hv_free_ent(hv, entry); | |
801 | xhv->xhv_keys--; /* HvKEYS(hv)-- */ | |
802 | } | |
fde52b5c | 803 | return sv; |
804 | } | |
8aacddc1 NIS |
805 | if (SvREADONLY(hv)) { |
806 | Perl_hv_notallowed(aTHX_ is_utf8, key, klen, keysave); | |
807 | } | |
808 | ||
f9a63242 JH |
809 | if (key != keysave) |
810 | Safefree(key); | |
fde52b5c | 811 | return Nullsv; |
812 | } | |
813 | ||
954c1994 GS |
814 | /* |
815 | =for apidoc hv_delete_ent | |
816 | ||
817 | Deletes a key/value pair in the hash. The value SV is removed from the | |
818 | hash and returned to the caller. The C<flags> value will normally be zero; | |
819 | if set to G_DISCARD then NULL will be returned. C<hash> can be a valid | |
820 | precomputed hash value, or 0 to ask for it to be computed. | |
821 | ||
822 | =cut | |
823 | */ | |
824 | ||
fde52b5c | 825 | SV * |
864dbfa3 | 826 | Perl_hv_delete_ent(pTHX_ HV *hv, SV *keysv, I32 flags, U32 hash) |
fde52b5c | 827 | { |
cbec9347 | 828 | register XPVHV* xhv; |
fde52b5c | 829 | register I32 i; |
830 | register char *key; | |
831 | STRLEN klen; | |
832 | register HE *entry; | |
833 | register HE **oentry; | |
834 | SV *sv; | |
da58a35d | 835 | bool is_utf8; |
f9a63242 | 836 | char *keysave; |
1c846c1f | 837 | |
fde52b5c | 838 | if (!hv) |
839 | return Nullsv; | |
840 | if (SvRMAGICAL(hv)) { | |
0a0bb7c7 OT |
841 | bool needs_copy; |
842 | bool needs_store; | |
843 | hv_magic_check (hv, &needs_copy, &needs_store); | |
844 | ||
67a38de0 | 845 | if (needs_copy && (entry = hv_fetch_ent(hv, keysv, TRUE, hash))) { |
0a0bb7c7 OT |
846 | sv = HeVAL(entry); |
847 | mg_clear(sv); | |
848 | if (!needs_store) { | |
14befaf4 DM |
849 | if (mg_find(sv, PERL_MAGIC_tiedelem)) { |
850 | /* No longer an element */ | |
851 | sv_unmagic(sv, PERL_MAGIC_tiedelem); | |
0a0bb7c7 OT |
852 | return sv; |
853 | } | |
854 | return Nullsv; /* element cannot be deleted */ | |
855 | } | |
902173a3 | 856 | #ifdef ENV_IS_CASELESS |
14befaf4 | 857 | else if (mg_find((SV*)hv, PERL_MAGIC_env)) { |
2fd1c6b8 | 858 | key = SvPV(keysv, klen); |
79cb57f6 | 859 | keysv = sv_2mortal(newSVpvn(key,klen)); |
2fd1c6b8 | 860 | (void)strupr(SvPVX(keysv)); |
1c846c1f | 861 | hash = 0; |
2fd1c6b8 | 862 | } |
902173a3 | 863 | #endif |
2fd1c6b8 | 864 | } |
fde52b5c | 865 | } |
cbec9347 JH |
866 | xhv = (XPVHV*)SvANY(hv); |
867 | if (!xhv->xhv_array /* !HvARRAY(hv) */) | |
fde52b5c | 868 | return Nullsv; |
869 | ||
f9a63242 | 870 | keysave = key = SvPV(keysv, klen); |
da58a35d | 871 | is_utf8 = (SvUTF8(keysv) != 0); |
1c846c1f | 872 | |
77caf834 | 873 | if (is_utf8) |
f9a63242 JH |
874 | key = (char*)bytes_from_utf8((U8*)key, &klen, &is_utf8); |
875 | ||
fde52b5c | 876 | if (!hash) |
877 | PERL_HASH(hash, key, klen); | |
878 | ||
cbec9347 JH |
879 | /* oentry = &(HvARRAY(hv))[hash & (I32) HvMAX(hv)]; */ |
880 | oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; | |
fde52b5c | 881 | entry = *oentry; |
882 | i = 1; | |
883 | for (; entry; i=0, oentry = &HeNEXT(entry), entry = *oentry) { | |
884 | if (HeHASH(entry) != hash) /* strings can't be equal */ | |
885 | continue; | |
886 | if (HeKLEN(entry) != klen) | |
887 | continue; | |
1c846c1f | 888 | if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */ |
fde52b5c | 889 | continue; |
c3654f1a IH |
890 | if (HeKUTF8(entry) != (char)is_utf8) |
891 | continue; | |
f9a63242 JH |
892 | if (key != keysave) |
893 | Safefree(key); | |
8aacddc1 NIS |
894 | |
895 | /* if placeholder is here, it's already been deleted.... */ | |
896 | if (HeVAL(entry) == &PL_sv_undef) | |
897 | { | |
898 | if (SvREADONLY(hv)) | |
899 | return Nullsv; /* if still SvREADONLY, leave it deleted. */ | |
03fed38d MB |
900 | |
901 | /* okay, really delete the placeholder. */ | |
902 | *oentry = HeNEXT(entry); | |
903 | if (i && !*oentry) | |
904 | xhv->xhv_fill--; /* HvFILL(hv)-- */ | |
905 | if (entry == xhv->xhv_eiter /* HvEITER(hv) */) | |
906 | HvLAZYDEL_on(hv); | |
907 | else | |
908 | hv_free_ent(hv, entry); | |
909 | xhv->xhv_keys--; /* HvKEYS(hv)-- */ | |
910 | xhv->xhv_placeholders--; | |
911 | return Nullsv; | |
8aacddc1 NIS |
912 | } |
913 | else if (SvREADONLY(hv) && HeVAL(entry) && SvREADONLY(HeVAL(entry))) { | |
914 | Perl_hv_notallowed(aTHX_ is_utf8, key, klen, keysave); | |
915 | } | |
916 | ||
fde52b5c | 917 | if (flags & G_DISCARD) |
918 | sv = Nullsv; | |
94f7643d | 919 | else { |
79d01fbf | 920 | sv = sv_2mortal(HeVAL(entry)); |
94f7643d GS |
921 | HeVAL(entry) = &PL_sv_undef; |
922 | } | |
8aacddc1 NIS |
923 | |
924 | /* | |
925 | * If a restricted hash, rather than really deleting the entry, put | |
926 | * a placeholder there. This marks the key as being "approved", so | |
927 | * we can still access via not-really-existing key without raising | |
928 | * an error. | |
929 | */ | |
930 | if (SvREADONLY(hv)) { | |
931 | HeVAL(entry) = &PL_sv_undef; | |
932 | /* We'll be saving this slot, so the number of allocated keys | |
933 | * doesn't go down, but the number placeholders goes up */ | |
934 | xhv->xhv_placeholders++; /* HvPLACEHOLDERS(hv)++ */ | |
935 | } else { | |
a26e96df NIS |
936 | *oentry = HeNEXT(entry); |
937 | if (i && !*oentry) | |
938 | xhv->xhv_fill--; /* HvFILL(hv)-- */ | |
8aacddc1 NIS |
939 | if (entry == xhv->xhv_eiter /* HvEITER(hv) */) |
940 | HvLAZYDEL_on(hv); | |
941 | else | |
942 | hv_free_ent(hv, entry); | |
943 | xhv->xhv_keys--; /* HvKEYS(hv)-- */ | |
944 | } | |
79072805 LW |
945 | return sv; |
946 | } | |
8aacddc1 NIS |
947 | if (SvREADONLY(hv)) { |
948 | Perl_hv_notallowed(aTHX_ is_utf8, key, klen, keysave); | |
949 | } | |
950 | ||
f9a63242 JH |
951 | if (key != keysave) |
952 | Safefree(key); | |
79072805 | 953 | return Nullsv; |
79072805 LW |
954 | } |
955 | ||
954c1994 GS |
956 | /* |
957 | =for apidoc hv_exists | |
958 | ||
959 | Returns a boolean indicating whether the specified hash key exists. The | |
960 | C<klen> is the length of the key. | |
961 | ||
962 | =cut | |
963 | */ | |
964 | ||
a0d0e21e | 965 | bool |
da58a35d | 966 | Perl_hv_exists(pTHX_ HV *hv, const char *key, I32 klen) |
a0d0e21e | 967 | { |
cbec9347 | 968 | register XPVHV* xhv; |
fde52b5c | 969 | register U32 hash; |
a0d0e21e LW |
970 | register HE *entry; |
971 | SV *sv; | |
da58a35d | 972 | bool is_utf8 = FALSE; |
f9a63242 | 973 | const char *keysave = key; |
a0d0e21e LW |
974 | |
975 | if (!hv) | |
976 | return 0; | |
977 | ||
da58a35d JH |
978 | if (klen < 0) { |
979 | klen = -klen; | |
980 | is_utf8 = TRUE; | |
981 | } | |
982 | ||
a0d0e21e | 983 | if (SvRMAGICAL(hv)) { |
14befaf4 | 984 | if (mg_find((SV*)hv, PERL_MAGIC_tied) || SvGMAGICAL((SV*)hv)) { |
a0d0e21e | 985 | sv = sv_newmortal(); |
1c846c1f | 986 | mg_copy((SV*)hv, sv, key, klen); |
14befaf4 | 987 | magic_existspack(sv, mg_find(sv, PERL_MAGIC_tiedelem)); |
a0d0e21e LW |
988 | return SvTRUE(sv); |
989 | } | |
902173a3 | 990 | #ifdef ENV_IS_CASELESS |
14befaf4 | 991 | else if (mg_find((SV*)hv, PERL_MAGIC_env)) { |
79cb57f6 | 992 | sv = sv_2mortal(newSVpvn(key,klen)); |
902173a3 GS |
993 | key = strupr(SvPVX(sv)); |
994 | } | |
995 | #endif | |
a0d0e21e LW |
996 | } |
997 | ||
cbec9347 | 998 | xhv = (XPVHV*)SvANY(hv); |
f675dbe5 | 999 | #ifndef DYNAMIC_ENV_FETCH |
cbec9347 | 1000 | if (!xhv->xhv_array /* !HvARRAY(hv) */) |
1c846c1f | 1001 | return 0; |
f675dbe5 | 1002 | #endif |
a0d0e21e | 1003 | |
77caf834 | 1004 | if (is_utf8) { |
75a54232 JH |
1005 | STRLEN tmplen = klen; |
1006 | /* See the note in hv_fetch(). --jhi */ | |
1007 | key = (char*)bytes_from_utf8((U8*)key, &tmplen, &is_utf8); | |
1008 | klen = tmplen; | |
1009 | } | |
f9a63242 | 1010 | |
fde52b5c | 1011 | PERL_HASH(hash, key, klen); |
a0d0e21e | 1012 | |
f675dbe5 | 1013 | #ifdef DYNAMIC_ENV_FETCH |
cbec9347 | 1014 | if (!xhv->xhv_array /* !HvARRAY(hv) */) entry = Null(HE*); |
f675dbe5 CB |
1015 | else |
1016 | #endif | |
cbec9347 JH |
1017 | /* entry = (HvARRAY(hv))[hash & (I32) HvMAX(hv)]; */ |
1018 | entry = ((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; | |
fde52b5c | 1019 | for (; entry; entry = HeNEXT(entry)) { |
1020 | if (HeHASH(entry) != hash) /* strings can't be equal */ | |
a0d0e21e | 1021 | continue; |
fde52b5c | 1022 | if (HeKLEN(entry) != klen) |
a0d0e21e | 1023 | continue; |
1c846c1f | 1024 | if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */ |
fde52b5c | 1025 | continue; |
c3654f1a IH |
1026 | if (HeKUTF8(entry) != (char)is_utf8) |
1027 | continue; | |
f9a63242 JH |
1028 | if (key != keysave) |
1029 | Safefree(key); | |
8aacddc1 NIS |
1030 | /* If we find the key, but the value is a placeholder, return false. */ |
1031 | if (HeVAL(entry) == &PL_sv_undef) | |
1032 | return FALSE; | |
1033 | ||
fde52b5c | 1034 | return TRUE; |
1035 | } | |
f675dbe5 | 1036 | #ifdef DYNAMIC_ENV_FETCH /* is it out there? */ |
cbec9347 | 1037 | if (SvRMAGICAL((SV*)hv) && mg_find((SV*)hv, PERL_MAGIC_env)) { |
a6c40364 GS |
1038 | unsigned long len; |
1039 | char *env = PerlEnv_ENVgetenv_len(key,&len); | |
1040 | if (env) { | |
1041 | sv = newSVpvn(env,len); | |
1042 | SvTAINTED_on(sv); | |
1043 | (void)hv_store(hv,key,klen,sv,hash); | |
1044 | return TRUE; | |
1045 | } | |
f675dbe5 CB |
1046 | } |
1047 | #endif | |
f9a63242 JH |
1048 | if (key != keysave) |
1049 | Safefree(key); | |
fde52b5c | 1050 | return FALSE; |
1051 | } | |
1052 | ||
1053 | ||
954c1994 GS |
1054 | /* |
1055 | =for apidoc hv_exists_ent | |
1056 | ||
1057 | Returns a boolean indicating whether the specified hash key exists. C<hash> | |
1058 | can be a valid precomputed hash value, or 0 to ask for it to be | |
1059 | computed. | |
1060 | ||
1061 | =cut | |
1062 | */ | |
1063 | ||
fde52b5c | 1064 | bool |
864dbfa3 | 1065 | Perl_hv_exists_ent(pTHX_ HV *hv, SV *keysv, U32 hash) |
fde52b5c | 1066 | { |
cbec9347 | 1067 | register XPVHV* xhv; |
fde52b5c | 1068 | register char *key; |
1069 | STRLEN klen; | |
1070 | register HE *entry; | |
1071 | SV *sv; | |
c3654f1a | 1072 | bool is_utf8; |
f9a63242 | 1073 | char *keysave; |
fde52b5c | 1074 | |
1075 | if (!hv) | |
1076 | return 0; | |
1077 | ||
1078 | if (SvRMAGICAL(hv)) { | |
14befaf4 | 1079 | if (mg_find((SV*)hv, PERL_MAGIC_tied) || SvGMAGICAL((SV*)hv)) { |
8aacddc1 | 1080 | SV* svret = sv_newmortal(); |
fde52b5c | 1081 | sv = sv_newmortal(); |
effa1e2d | 1082 | keysv = sv_2mortal(newSVsv(keysv)); |
1c846c1f | 1083 | mg_copy((SV*)hv, sv, (char*)keysv, HEf_SVKEY); |
8aacddc1 NIS |
1084 | magic_existspack(svret, mg_find(sv, PERL_MAGIC_tiedelem)); |
1085 | return SvTRUE(svret); | |
fde52b5c | 1086 | } |
902173a3 | 1087 | #ifdef ENV_IS_CASELESS |
14befaf4 | 1088 | else if (mg_find((SV*)hv, PERL_MAGIC_env)) { |
902173a3 | 1089 | key = SvPV(keysv, klen); |
79cb57f6 | 1090 | keysv = sv_2mortal(newSVpvn(key,klen)); |
902173a3 | 1091 | (void)strupr(SvPVX(keysv)); |
1c846c1f | 1092 | hash = 0; |
902173a3 GS |
1093 | } |
1094 | #endif | |
fde52b5c | 1095 | } |
1096 | ||
cbec9347 | 1097 | xhv = (XPVHV*)SvANY(hv); |
f675dbe5 | 1098 | #ifndef DYNAMIC_ENV_FETCH |
cbec9347 | 1099 | if (!xhv->xhv_array /* !HvARRAY(hv) */) |
1c846c1f | 1100 | return 0; |
f675dbe5 | 1101 | #endif |
fde52b5c | 1102 | |
f9a63242 | 1103 | keysave = key = SvPV(keysv, klen); |
c3654f1a | 1104 | is_utf8 = (SvUTF8(keysv) != 0); |
77caf834 | 1105 | if (is_utf8) |
f9a63242 | 1106 | key = (char*)bytes_from_utf8((U8*)key, &klen, &is_utf8); |
fde52b5c | 1107 | if (!hash) |
1108 | PERL_HASH(hash, key, klen); | |
1109 | ||
f675dbe5 | 1110 | #ifdef DYNAMIC_ENV_FETCH |
cbec9347 | 1111 | if (!xhv->xhv_array /* !HvARRAY(hv) */) entry = Null(HE*); |
f675dbe5 CB |
1112 | else |
1113 | #endif | |
cbec9347 JH |
1114 | /* entry = (HvARRAY(hv))[hash & (I32) HvMAX(hv)]; */ |
1115 | entry = ((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; | |
fde52b5c | 1116 | for (; entry; entry = HeNEXT(entry)) { |
1117 | if (HeHASH(entry) != hash) /* strings can't be equal */ | |
1118 | continue; | |
1119 | if (HeKLEN(entry) != klen) | |
1120 | continue; | |
1c846c1f | 1121 | if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */ |
a0d0e21e | 1122 | continue; |
c3654f1a IH |
1123 | if (HeKUTF8(entry) != (char)is_utf8) |
1124 | continue; | |
f9a63242 JH |
1125 | if (key != keysave) |
1126 | Safefree(key); | |
8aacddc1 NIS |
1127 | /* If we find the key, but the value is a placeholder, return false. */ |
1128 | if (HeVAL(entry) == &PL_sv_undef) | |
1129 | return FALSE; | |
a0d0e21e LW |
1130 | return TRUE; |
1131 | } | |
f675dbe5 | 1132 | #ifdef DYNAMIC_ENV_FETCH /* is it out there? */ |
cbec9347 | 1133 | if (SvRMAGICAL((SV*)hv) && mg_find((SV*)hv, PERL_MAGIC_env)) { |
a6c40364 GS |
1134 | unsigned long len; |
1135 | char *env = PerlEnv_ENVgetenv_len(key,&len); | |
1136 | if (env) { | |
1137 | sv = newSVpvn(env,len); | |
1138 | SvTAINTED_on(sv); | |
1139 | (void)hv_store_ent(hv,keysv,sv,hash); | |
1140 | return TRUE; | |
1141 | } | |
f675dbe5 CB |
1142 | } |
1143 | #endif | |
f9a63242 JH |
1144 | if (key != keysave) |
1145 | Safefree(key); | |
a0d0e21e LW |
1146 | return FALSE; |
1147 | } | |
1148 | ||
76e3520e | 1149 | STATIC void |
cea2e8a9 | 1150 | S_hsplit(pTHX_ HV *hv) |
79072805 | 1151 | { |
cbec9347 JH |
1152 | register XPVHV* xhv = (XPVHV*)SvANY(hv); |
1153 | I32 oldsize = (I32) xhv->xhv_max+1; /* HvMAX(hv)+1 (sick) */ | |
79072805 LW |
1154 | register I32 newsize = oldsize * 2; |
1155 | register I32 i; | |
cbec9347 | 1156 | register char *a = xhv->xhv_array; /* HvARRAY(hv) */ |
72311751 GS |
1157 | register HE **aep; |
1158 | register HE **bep; | |
79072805 LW |
1159 | register HE *entry; |
1160 | register HE **oentry; | |
1161 | ||
3280af22 | 1162 | PL_nomemok = TRUE; |
8d6dde3e | 1163 | #if defined(STRANGE_MALLOC) || defined(MYMALLOC) |
d18c6117 | 1164 | Renew(a, PERL_HV_ARRAY_ALLOC_BYTES(newsize), char); |
422a93e5 | 1165 | if (!a) { |
4a33f861 | 1166 | PL_nomemok = FALSE; |
422a93e5 GA |
1167 | return; |
1168 | } | |
4633a7c4 | 1169 | #else |
d18c6117 | 1170 | New(2, a, PERL_HV_ARRAY_ALLOC_BYTES(newsize), char); |
422a93e5 | 1171 | if (!a) { |
3280af22 | 1172 | PL_nomemok = FALSE; |
422a93e5 GA |
1173 | return; |
1174 | } | |
cbec9347 | 1175 | Copy(xhv->xhv_array /* HvARRAY(hv) */, a, oldsize * sizeof(HE*), char); |
fba3b22e | 1176 | if (oldsize >= 64) { |
cbec9347 JH |
1177 | offer_nice_chunk(xhv->xhv_array /* HvARRAY(hv) */, |
1178 | PERL_HV_ARRAY_ALLOC_BYTES(oldsize)); | |
4633a7c4 LW |
1179 | } |
1180 | else | |
cbec9347 | 1181 | Safefree(xhv->xhv_array /* HvARRAY(hv) */); |
4633a7c4 LW |
1182 | #endif |
1183 | ||
3280af22 | 1184 | PL_nomemok = FALSE; |
72311751 | 1185 | Zero(&a[oldsize * sizeof(HE*)], (newsize-oldsize) * sizeof(HE*), char); /* zero 2nd half*/ |
cbec9347 JH |
1186 | xhv->xhv_max = --newsize; /* HvMAX(hv) = --newsize */ |
1187 | xhv->xhv_array = a; /* HvARRAY(hv) = a */ | |
72311751 | 1188 | aep = (HE**)a; |
79072805 | 1189 | |
72311751 GS |
1190 | for (i=0; i<oldsize; i++,aep++) { |
1191 | if (!*aep) /* non-existent */ | |
79072805 | 1192 | continue; |
72311751 GS |
1193 | bep = aep+oldsize; |
1194 | for (oentry = aep, entry = *aep; entry; entry = *oentry) { | |
fde52b5c | 1195 | if ((HeHASH(entry) & newsize) != i) { |
1196 | *oentry = HeNEXT(entry); | |
72311751 GS |
1197 | HeNEXT(entry) = *bep; |
1198 | if (!*bep) | |
cbec9347 | 1199 | xhv->xhv_fill++; /* HvFILL(hv)++ */ |
72311751 | 1200 | *bep = entry; |
79072805 LW |
1201 | continue; |
1202 | } | |
1203 | else | |
fde52b5c | 1204 | oentry = &HeNEXT(entry); |
79072805 | 1205 | } |
72311751 | 1206 | if (!*aep) /* everything moved */ |
cbec9347 | 1207 | xhv->xhv_fill--; /* HvFILL(hv)-- */ |
79072805 LW |
1208 | } |
1209 | } | |
1210 | ||
72940dca | 1211 | void |
864dbfa3 | 1212 | Perl_hv_ksplit(pTHX_ HV *hv, IV newmax) |
72940dca | 1213 | { |
cbec9347 JH |
1214 | register XPVHV* xhv = (XPVHV*)SvANY(hv); |
1215 | I32 oldsize = (I32) xhv->xhv_max+1; /* HvMAX(hv)+1 (sick) */ | |
72940dca | 1216 | register I32 newsize; |
1217 | register I32 i; | |
1218 | register I32 j; | |
72311751 GS |
1219 | register char *a; |
1220 | register HE **aep; | |
72940dca | 1221 | register HE *entry; |
1222 | register HE **oentry; | |
1223 | ||
1224 | newsize = (I32) newmax; /* possible truncation here */ | |
1225 | if (newsize != newmax || newmax <= oldsize) | |
1226 | return; | |
1227 | while ((newsize & (1 + ~newsize)) != newsize) { | |
1228 | newsize &= ~(newsize & (1 + ~newsize)); /* get proper power of 2 */ | |
1229 | } | |
1230 | if (newsize < newmax) | |
1231 | newsize *= 2; | |
1232 | if (newsize < newmax) | |
1233 | return; /* overflow detection */ | |
1234 | ||
cbec9347 | 1235 | a = xhv->xhv_array; /* HvARRAY(hv) */ |
72940dca | 1236 | if (a) { |
3280af22 | 1237 | PL_nomemok = TRUE; |
8d6dde3e | 1238 | #if defined(STRANGE_MALLOC) || defined(MYMALLOC) |
d18c6117 | 1239 | Renew(a, PERL_HV_ARRAY_ALLOC_BYTES(newsize), char); |
8aacddc1 | 1240 | if (!a) { |
4a33f861 | 1241 | PL_nomemok = FALSE; |
422a93e5 GA |
1242 | return; |
1243 | } | |
72940dca | 1244 | #else |
d18c6117 | 1245 | New(2, a, PERL_HV_ARRAY_ALLOC_BYTES(newsize), char); |
8aacddc1 | 1246 | if (!a) { |
3280af22 | 1247 | PL_nomemok = FALSE; |
422a93e5 GA |
1248 | return; |
1249 | } | |
cbec9347 | 1250 | Copy(xhv->xhv_array /* HvARRAY(hv) */, a, oldsize * sizeof(HE*), char); |
fba3b22e | 1251 | if (oldsize >= 64) { |
cbec9347 JH |
1252 | offer_nice_chunk(xhv->xhv_array /* HvARRAY(hv) */, |
1253 | PERL_HV_ARRAY_ALLOC_BYTES(oldsize)); | |
72940dca | 1254 | } |
1255 | else | |
cbec9347 | 1256 | Safefree(xhv->xhv_array /* HvARRAY(hv) */); |
72940dca | 1257 | #endif |
3280af22 | 1258 | PL_nomemok = FALSE; |
72311751 | 1259 | Zero(&a[oldsize * sizeof(HE*)], (newsize-oldsize) * sizeof(HE*), char); /* zero 2nd half*/ |
72940dca | 1260 | } |
1261 | else { | |
d18c6117 | 1262 | Newz(0, a, PERL_HV_ARRAY_ALLOC_BYTES(newsize), char); |
72940dca | 1263 | } |
cbec9347 JH |
1264 | xhv->xhv_max = --newsize; /* HvMAX(hv) = --newsize */ |
1265 | xhv->xhv_array = a; /* HvARRAY(hv) = a */ | |
1266 | if (!xhv->xhv_fill /* !HvFILL(hv) */) /* skip rest if no entries */ | |
72940dca | 1267 | return; |
1268 | ||
72311751 GS |
1269 | aep = (HE**)a; |
1270 | for (i=0; i<oldsize; i++,aep++) { | |
1271 | if (!*aep) /* non-existent */ | |
72940dca | 1272 | continue; |
72311751 | 1273 | for (oentry = aep, entry = *aep; entry; entry = *oentry) { |
72940dca | 1274 | if ((j = (HeHASH(entry) & newsize)) != i) { |
1275 | j -= i; | |
1276 | *oentry = HeNEXT(entry); | |
72311751 | 1277 | if (!(HeNEXT(entry) = aep[j])) |
cbec9347 | 1278 | xhv->xhv_fill++; /* HvFILL(hv)++ */ |
72311751 | 1279 | aep[j] = entry; |
72940dca | 1280 | continue; |
1281 | } | |
1282 | else | |
1283 | oentry = &HeNEXT(entry); | |
1284 | } | |
72311751 | 1285 | if (!*aep) /* everything moved */ |
cbec9347 | 1286 | xhv->xhv_fill--; /* HvFILL(hv)-- */ |
72940dca | 1287 | } |
1288 | } | |
1289 | ||
954c1994 GS |
1290 | /* |
1291 | =for apidoc newHV | |
1292 | ||
1293 | Creates a new HV. The reference count is set to 1. | |
1294 | ||
1295 | =cut | |
1296 | */ | |
1297 | ||
79072805 | 1298 | HV * |
864dbfa3 | 1299 | Perl_newHV(pTHX) |
79072805 LW |
1300 | { |
1301 | register HV *hv; | |
cbec9347 | 1302 | register XPVHV* xhv; |
79072805 | 1303 | |
a0d0e21e LW |
1304 | hv = (HV*)NEWSV(502,0); |
1305 | sv_upgrade((SV *)hv, SVt_PVHV); | |
cbec9347 | 1306 | xhv = (XPVHV*)SvANY(hv); |
79072805 LW |
1307 | SvPOK_off(hv); |
1308 | SvNOK_off(hv); | |
1c846c1f | 1309 | #ifndef NODEFAULT_SHAREKEYS |
fde52b5c | 1310 | HvSHAREKEYS_on(hv); /* key-sharing on by default */ |
1c846c1f | 1311 | #endif |
cbec9347 JH |
1312 | xhv->xhv_max = 7; /* HvMAX(hv) = 7 (start with 8 buckets) */ |
1313 | xhv->xhv_fill = 0; /* HvFILL(hv) = 0 */ | |
1314 | xhv->xhv_pmroot = 0; /* HvPMROOT(hv) = 0 */ | |
79072805 LW |
1315 | (void)hv_iterinit(hv); /* so each() will start off right */ |
1316 | return hv; | |
1317 | } | |
1318 | ||
b3ac6de7 | 1319 | HV * |
864dbfa3 | 1320 | Perl_newHVhv(pTHX_ HV *ohv) |
b3ac6de7 | 1321 | { |
b56ba0bf | 1322 | HV *hv = newHV(); |
4beac62f | 1323 | STRLEN hv_max, hv_fill; |
4beac62f AMS |
1324 | |
1325 | if (!ohv || (hv_fill = HvFILL(ohv)) == 0) | |
1326 | return hv; | |
4beac62f | 1327 | hv_max = HvMAX(ohv); |
b3ac6de7 | 1328 | |
b56ba0bf AMS |
1329 | if (!SvMAGICAL((SV *)ohv)) { |
1330 | /* It's an ordinary hash, so copy it fast. AMS 20010804 */ | |
1331 | int i, shared = !!HvSHAREKEYS(ohv); | |
1332 | HE **ents, **oents = (HE **)HvARRAY(ohv); | |
ff875642 JH |
1333 | char *a; |
1334 | New(0, a, PERL_HV_ARRAY_ALLOC_BYTES(hv_max+1), char); | |
1335 | ents = (HE**)a; | |
b56ba0bf AMS |
1336 | |
1337 | /* In each bucket... */ | |
1338 | for (i = 0; i <= hv_max; i++) { | |
1339 | HE *prev = NULL, *ent = NULL, *oent = oents[i]; | |
1340 | ||
1341 | if (!oent) { | |
1342 | ents[i] = NULL; | |
1343 | continue; | |
1344 | } | |
1345 | ||
1346 | /* Copy the linked list of entries. */ | |
1347 | for (oent = oents[i]; oent; oent = HeNEXT(oent)) { | |
1348 | U32 hash = HeHASH(oent); | |
1349 | char *key = HeKEY(oent); | |
1350 | STRLEN len = HeKLEN_UTF8(oent); | |
1351 | ||
1352 | ent = new_HE(); | |
45dea987 | 1353 | HeVAL(ent) = newSVsv(HeVAL(oent)); |
b56ba0bf AMS |
1354 | HeKEY_hek(ent) = shared ? share_hek(key, len, hash) |
1355 | : save_hek(key, len, hash); | |
1356 | if (prev) | |
1357 | HeNEXT(prev) = ent; | |
1358 | else | |
1359 | ents[i] = ent; | |
1360 | prev = ent; | |
1361 | HeNEXT(ent) = NULL; | |
1362 | } | |
1363 | } | |
1364 | ||
1365 | HvMAX(hv) = hv_max; | |
1366 | HvFILL(hv) = hv_fill; | |
8aacddc1 | 1367 | HvTOTALKEYS(hv) = HvTOTALKEYS(ohv); |
b56ba0bf | 1368 | HvARRAY(hv) = ents; |
1c846c1f | 1369 | } |
b56ba0bf AMS |
1370 | else { |
1371 | /* Iterate over ohv, copying keys and values one at a time. */ | |
b3ac6de7 | 1372 | HE *entry; |
b56ba0bf AMS |
1373 | I32 riter = HvRITER(ohv); |
1374 | HE *eiter = HvEITER(ohv); | |
1375 | ||
1376 | /* Can we use fewer buckets? (hv_max is always 2^n-1) */ | |
1377 | while (hv_max && hv_max + 1 >= hv_fill * 2) | |
1378 | hv_max = hv_max / 2; | |
1379 | HvMAX(hv) = hv_max; | |
1380 | ||
4a76a316 | 1381 | hv_iterinit(ohv); |
155aba94 | 1382 | while ((entry = hv_iternext(ohv))) { |
c3654f1a | 1383 | hv_store(hv, HeKEY(entry), HeKLEN_UTF8(entry), |
00122d59 | 1384 | newSVsv(HeVAL(entry)), HeHASH(entry)); |
b3ac6de7 | 1385 | } |
b56ba0bf AMS |
1386 | HvRITER(ohv) = riter; |
1387 | HvEITER(ohv) = eiter; | |
b3ac6de7 | 1388 | } |
1c846c1f | 1389 | |
b3ac6de7 IZ |
1390 | return hv; |
1391 | } | |
1392 | ||
79072805 | 1393 | void |
864dbfa3 | 1394 | Perl_hv_free_ent(pTHX_ HV *hv, register HE *entry) |
79072805 | 1395 | { |
16bdeea2 GS |
1396 | SV *val; |
1397 | ||
68dc0745 | 1398 | if (!entry) |
79072805 | 1399 | return; |
16bdeea2 | 1400 | val = HeVAL(entry); |
257c9e5b | 1401 | if (val && isGV(val) && GvCVu(val) && HvNAME(hv)) |
3280af22 | 1402 | PL_sub_generation++; /* may be deletion of method from stash */ |
16bdeea2 | 1403 | SvREFCNT_dec(val); |
68dc0745 | 1404 | if (HeKLEN(entry) == HEf_SVKEY) { |
1405 | SvREFCNT_dec(HeKEY_sv(entry)); | |
8aacddc1 | 1406 | Safefree(HeKEY_hek(entry)); |
44a8e56a | 1407 | } |
1408 | else if (HvSHAREKEYS(hv)) | |
68dc0745 | 1409 | unshare_hek(HeKEY_hek(entry)); |
fde52b5c | 1410 | else |
68dc0745 | 1411 | Safefree(HeKEY_hek(entry)); |
d33b2eba | 1412 | del_HE(entry); |
79072805 LW |
1413 | } |
1414 | ||
1415 | void | |
864dbfa3 | 1416 | Perl_hv_delayfree_ent(pTHX_ HV *hv, register HE *entry) |
79072805 | 1417 | { |
68dc0745 | 1418 | if (!entry) |
79072805 | 1419 | return; |
68dc0745 | 1420 | if (isGV(HeVAL(entry)) && GvCVu(HeVAL(entry)) && HvNAME(hv)) |
3280af22 | 1421 | PL_sub_generation++; /* may be deletion of method from stash */ |
68dc0745 | 1422 | sv_2mortal(HeVAL(entry)); /* free between statements */ |
1423 | if (HeKLEN(entry) == HEf_SVKEY) { | |
1424 | sv_2mortal(HeKEY_sv(entry)); | |
1425 | Safefree(HeKEY_hek(entry)); | |
44a8e56a | 1426 | } |
1427 | else if (HvSHAREKEYS(hv)) | |
68dc0745 | 1428 | unshare_hek(HeKEY_hek(entry)); |
fde52b5c | 1429 | else |
68dc0745 | 1430 | Safefree(HeKEY_hek(entry)); |
d33b2eba | 1431 | del_HE(entry); |
79072805 LW |
1432 | } |
1433 | ||
954c1994 GS |
1434 | /* |
1435 | =for apidoc hv_clear | |
1436 | ||
1437 | Clears a hash, making it empty. | |
1438 | ||
1439 | =cut | |
1440 | */ | |
1441 | ||
79072805 | 1442 | void |
864dbfa3 | 1443 | Perl_hv_clear(pTHX_ HV *hv) |
79072805 | 1444 | { |
cbec9347 | 1445 | register XPVHV* xhv; |
79072805 LW |
1446 | if (!hv) |
1447 | return; | |
cbec9347 | 1448 | xhv = (XPVHV*)SvANY(hv); |
463ee0b2 | 1449 | hfreeentries(hv); |
cbec9347 JH |
1450 | xhv->xhv_fill = 0; /* HvFILL(hv) = 0 */ |
1451 | xhv->xhv_keys = 0; /* HvKEYS(hv) = 0 */ | |
8aacddc1 | 1452 | xhv->xhv_placeholders = 0; /* HvPLACEHOLDERS(hv) = 0 */ |
cbec9347 JH |
1453 | if (xhv->xhv_array /* HvARRAY(hv) */) |
1454 | (void)memzero(xhv->xhv_array /* HvARRAY(hv) */, | |
1455 | (xhv->xhv_max+1 /* HvMAX(hv)+1 */) * sizeof(HE*)); | |
a0d0e21e LW |
1456 | |
1457 | if (SvRMAGICAL(hv)) | |
1c846c1f | 1458 | mg_clear((SV*)hv); |
79072805 LW |
1459 | } |
1460 | ||
76e3520e | 1461 | STATIC void |
cea2e8a9 | 1462 | S_hfreeentries(pTHX_ HV *hv) |
79072805 | 1463 | { |
a0d0e21e | 1464 | register HE **array; |
68dc0745 | 1465 | register HE *entry; |
1466 | register HE *oentry = Null(HE*); | |
a0d0e21e LW |
1467 | I32 riter; |
1468 | I32 max; | |
79072805 LW |
1469 | |
1470 | if (!hv) | |
1471 | return; | |
a0d0e21e | 1472 | if (!HvARRAY(hv)) |
79072805 | 1473 | return; |
a0d0e21e LW |
1474 | |
1475 | riter = 0; | |
1476 | max = HvMAX(hv); | |
1477 | array = HvARRAY(hv); | |
68dc0745 | 1478 | entry = array[0]; |
a0d0e21e | 1479 | for (;;) { |
68dc0745 | 1480 | if (entry) { |
1481 | oentry = entry; | |
1482 | entry = HeNEXT(entry); | |
1483 | hv_free_ent(hv, oentry); | |
a0d0e21e | 1484 | } |
68dc0745 | 1485 | if (!entry) { |
a0d0e21e LW |
1486 | if (++riter > max) |
1487 | break; | |
68dc0745 | 1488 | entry = array[riter]; |
1c846c1f | 1489 | } |
79072805 | 1490 | } |
a0d0e21e | 1491 | (void)hv_iterinit(hv); |
79072805 LW |
1492 | } |
1493 | ||
954c1994 GS |
1494 | /* |
1495 | =for apidoc hv_undef | |
1496 | ||
1497 | Undefines the hash. | |
1498 | ||
1499 | =cut | |
1500 | */ | |
1501 | ||
79072805 | 1502 | void |
864dbfa3 | 1503 | Perl_hv_undef(pTHX_ HV *hv) |
79072805 | 1504 | { |
cbec9347 | 1505 | register XPVHV* xhv; |
79072805 LW |
1506 | if (!hv) |
1507 | return; | |
cbec9347 | 1508 | xhv = (XPVHV*)SvANY(hv); |
463ee0b2 | 1509 | hfreeentries(hv); |
cbec9347 | 1510 | Safefree(xhv->xhv_array /* HvARRAY(hv) */); |
85e6fe83 LW |
1511 | if (HvNAME(hv)) { |
1512 | Safefree(HvNAME(hv)); | |
1513 | HvNAME(hv) = 0; | |
1514 | } | |
cbec9347 JH |
1515 | xhv->xhv_max = 7; /* HvMAX(hv) = 7 (it's a normal hash) */ |
1516 | xhv->xhv_array = 0; /* HvARRAY(hv) = 0 */ | |
1517 | xhv->xhv_fill = 0; /* HvFILL(hv) = 0 */ | |
1518 | xhv->xhv_keys = 0; /* HvKEYS(hv) = 0 */ | |
8aacddc1 | 1519 | xhv->xhv_placeholders = 0; /* HvPLACEHOLDERS(hv) = 0 */ |
a0d0e21e LW |
1520 | |
1521 | if (SvRMAGICAL(hv)) | |
1c846c1f | 1522 | mg_clear((SV*)hv); |
79072805 LW |
1523 | } |
1524 | ||
954c1994 GS |
1525 | /* |
1526 | =for apidoc hv_iterinit | |
1527 | ||
1528 | Prepares a starting point to traverse a hash table. Returns the number of | |
1529 | keys in the hash (i.e. the same as C<HvKEYS(tb)>). The return value is | |
1c846c1f | 1530 | currently only meaningful for hashes without tie magic. |
954c1994 GS |
1531 | |
1532 | NOTE: Before version 5.004_65, C<hv_iterinit> used to return the number of | |
1533 | hash buckets that happen to be in use. If you still need that esoteric | |
1534 | value, you can get it through the macro C<HvFILL(tb)>. | |
1535 | ||
1536 | =cut | |
1537 | */ | |
1538 | ||
79072805 | 1539 | I32 |
864dbfa3 | 1540 | Perl_hv_iterinit(pTHX_ HV *hv) |
79072805 | 1541 | { |
cbec9347 | 1542 | register XPVHV* xhv; |
aa689395 | 1543 | HE *entry; |
1544 | ||
1545 | if (!hv) | |
cea2e8a9 | 1546 | Perl_croak(aTHX_ "Bad hash"); |
cbec9347 JH |
1547 | xhv = (XPVHV*)SvANY(hv); |
1548 | entry = xhv->xhv_eiter; /* HvEITER(hv) */ | |
72940dca | 1549 | if (entry && HvLAZYDEL(hv)) { /* was deleted earlier? */ |
1550 | HvLAZYDEL_off(hv); | |
68dc0745 | 1551 | hv_free_ent(hv, entry); |
72940dca | 1552 | } |
cbec9347 JH |
1553 | xhv->xhv_riter = -1; /* HvRITER(hv) = -1 */ |
1554 | xhv->xhv_eiter = Null(HE*); /* HvEITER(hv) = Null(HE*) */ | |
1555 | /* used to be xhv->xhv_fill before 5.004_65 */ | |
8aacddc1 | 1556 | return XHvTOTALKEYS(xhv); |
79072805 LW |
1557 | } |
1558 | ||
954c1994 GS |
1559 | /* |
1560 | =for apidoc hv_iternext | |
1561 | ||
1562 | Returns entries from a hash iterator. See C<hv_iterinit>. | |
1563 | ||
1564 | =cut | |
1565 | */ | |
1566 | ||
79072805 | 1567 | HE * |
864dbfa3 | 1568 | Perl_hv_iternext(pTHX_ HV *hv) |
79072805 | 1569 | { |
cbec9347 | 1570 | register XPVHV* xhv; |
79072805 | 1571 | register HE *entry; |
a0d0e21e | 1572 | HE *oldentry; |
463ee0b2 | 1573 | MAGIC* mg; |
79072805 LW |
1574 | |
1575 | if (!hv) | |
cea2e8a9 | 1576 | Perl_croak(aTHX_ "Bad hash"); |
cbec9347 JH |
1577 | xhv = (XPVHV*)SvANY(hv); |
1578 | oldentry = entry = xhv->xhv_eiter; /* HvEITER(hv) */ | |
463ee0b2 | 1579 | |
14befaf4 | 1580 | if ((mg = SvTIED_mg((SV*)hv, PERL_MAGIC_tied))) { |
8990e307 | 1581 | SV *key = sv_newmortal(); |
cd1469e6 | 1582 | if (entry) { |
fde52b5c | 1583 | sv_setsv(key, HeSVKEY_force(entry)); |
cd1469e6 | 1584 | SvREFCNT_dec(HeSVKEY(entry)); /* get rid of previous key */ |
1585 | } | |
a0d0e21e | 1586 | else { |
ff68c719 | 1587 | char *k; |
bbce6d69 | 1588 | HEK *hek; |
ff68c719 | 1589 | |
cbec9347 JH |
1590 | /* one HE per MAGICAL hash */ |
1591 | xhv->xhv_eiter = entry = new_HE(); /* HvEITER(hv) = new_HE() */ | |
4633a7c4 | 1592 | Zero(entry, 1, HE); |
ff68c719 | 1593 | Newz(54, k, HEK_BASESIZE + sizeof(SV*), char); |
1594 | hek = (HEK*)k; | |
1595 | HeKEY_hek(entry) = hek; | |
fde52b5c | 1596 | HeKLEN(entry) = HEf_SVKEY; |
a0d0e21e LW |
1597 | } |
1598 | magic_nextpack((SV*) hv,mg,key); | |
8aacddc1 | 1599 | if (SvOK(key)) { |
cd1469e6 | 1600 | /* force key to stay around until next time */ |
bbce6d69 | 1601 | HeSVKEY_set(entry, SvREFCNT_inc(key)); |
1602 | return entry; /* beware, hent_val is not set */ | |
8aacddc1 | 1603 | } |
fde52b5c | 1604 | if (HeVAL(entry)) |
1605 | SvREFCNT_dec(HeVAL(entry)); | |
ff68c719 | 1606 | Safefree(HeKEY_hek(entry)); |
d33b2eba | 1607 | del_HE(entry); |
cbec9347 | 1608 | xhv->xhv_eiter = Null(HE*); /* HvEITER(hv) = Null(HE*) */ |
463ee0b2 | 1609 | return Null(HE*); |
79072805 | 1610 | } |
f675dbe5 | 1611 | #ifdef DYNAMIC_ENV_FETCH /* set up %ENV for iteration */ |
cbec9347 | 1612 | if (!entry && SvRMAGICAL((SV*)hv) && mg_find((SV*)hv, PERL_MAGIC_env)) |
f675dbe5 CB |
1613 | prime_env_iter(); |
1614 | #endif | |
463ee0b2 | 1615 | |
cbec9347 JH |
1616 | if (!xhv->xhv_array /* !HvARRAY(hv) */) |
1617 | Newz(506, xhv->xhv_array /* HvARRAY(hv) */, | |
1618 | PERL_HV_ARRAY_ALLOC_BYTES(xhv->xhv_max+1 /* HvMAX(hv)+1 */), | |
1619 | char); | |
fde52b5c | 1620 | if (entry) |
8aacddc1 | 1621 | { |
fde52b5c | 1622 | entry = HeNEXT(entry); |
8aacddc1 NIS |
1623 | /* |
1624 | * Skip past any placeholders -- don't want to include them in | |
1625 | * any iteration. | |
1626 | */ | |
1627 | while (entry && HeVAL(entry) == &PL_sv_undef) { | |
1628 | entry = HeNEXT(entry); | |
1629 | } | |
1630 | } | |
fde52b5c | 1631 | while (!entry) { |
cbec9347 JH |
1632 | xhv->xhv_riter++; /* HvRITER(hv)++ */ |
1633 | if (xhv->xhv_riter > xhv->xhv_max /* HvRITER(hv) > HvMAX(hv) */) { | |
1634 | xhv->xhv_riter = -1; /* HvRITER(hv) = -1 */ | |
fde52b5c | 1635 | break; |
79072805 | 1636 | } |
cbec9347 JH |
1637 | /* entry = (HvARRAY(hv))[HvRITER(hv)]; */ |
1638 | entry = ((HE**)xhv->xhv_array)[xhv->xhv_riter]; | |
8aacddc1 NIS |
1639 | |
1640 | /* if we have an entry, but it's a placeholder, don't count it */ | |
1641 | if (entry && HeVAL(entry) == &PL_sv_undef) | |
1642 | entry = 0; | |
1643 | ||
fde52b5c | 1644 | } |
79072805 | 1645 | |
72940dca | 1646 | if (oldentry && HvLAZYDEL(hv)) { /* was deleted earlier? */ |
1647 | HvLAZYDEL_off(hv); | |
68dc0745 | 1648 | hv_free_ent(hv, oldentry); |
72940dca | 1649 | } |
a0d0e21e | 1650 | |
cbec9347 | 1651 | xhv->xhv_eiter = entry; /* HvEITER(hv) = entry */ |
79072805 LW |
1652 | return entry; |
1653 | } | |
1654 | ||
954c1994 GS |
1655 | /* |
1656 | =for apidoc hv_iterkey | |
1657 | ||
1658 | Returns the key from the current position of the hash iterator. See | |
1659 | C<hv_iterinit>. | |
1660 | ||
1661 | =cut | |
1662 | */ | |
1663 | ||
79072805 | 1664 | char * |
864dbfa3 | 1665 | Perl_hv_iterkey(pTHX_ register HE *entry, I32 *retlen) |
79072805 | 1666 | { |
fde52b5c | 1667 | if (HeKLEN(entry) == HEf_SVKEY) { |
fb73857a | 1668 | STRLEN len; |
1669 | char *p = SvPV(HeKEY_sv(entry), len); | |
1670 | *retlen = len; | |
1671 | return p; | |
fde52b5c | 1672 | } |
1673 | else { | |
1674 | *retlen = HeKLEN(entry); | |
1675 | return HeKEY(entry); | |
1676 | } | |
1677 | } | |
1678 | ||
1679 | /* unlike hv_iterval(), this always returns a mortal copy of the key */ | |
954c1994 GS |
1680 | /* |
1681 | =for apidoc hv_iterkeysv | |
1682 | ||
1683 | Returns the key as an C<SV*> from the current position of the hash | |
1684 | iterator. The return value will always be a mortal copy of the key. Also | |
1685 | see C<hv_iterinit>. | |
1686 | ||
1687 | =cut | |
1688 | */ | |
1689 | ||
fde52b5c | 1690 | SV * |
864dbfa3 | 1691 | Perl_hv_iterkeysv(pTHX_ register HE *entry) |
fde52b5c | 1692 | { |
1693 | if (HeKLEN(entry) == HEf_SVKEY) | |
bbce6d69 | 1694 | return sv_mortalcopy(HeKEY_sv(entry)); |
c3654f1a IH |
1695 | else |
1696 | return sv_2mortal(newSVpvn_share((HeKLEN(entry) ? HeKEY(entry) : ""), | |
1697 | HeKLEN_UTF8(entry), HeHASH(entry))); | |
79072805 LW |
1698 | } |
1699 | ||
954c1994 GS |
1700 | /* |
1701 | =for apidoc hv_iterval | |
1702 | ||
1703 | Returns the value from the current position of the hash iterator. See | |
1704 | C<hv_iterkey>. | |
1705 | ||
1706 | =cut | |
1707 | */ | |
1708 | ||
79072805 | 1709 | SV * |
864dbfa3 | 1710 | Perl_hv_iterval(pTHX_ HV *hv, register HE *entry) |
79072805 | 1711 | { |
8990e307 | 1712 | if (SvRMAGICAL(hv)) { |
14befaf4 | 1713 | if (mg_find((SV*)hv, PERL_MAGIC_tied)) { |
8990e307 | 1714 | SV* sv = sv_newmortal(); |
bbce6d69 | 1715 | if (HeKLEN(entry) == HEf_SVKEY) |
1716 | mg_copy((SV*)hv, sv, (char*)HeKEY_sv(entry), HEf_SVKEY); | |
1717 | else mg_copy((SV*)hv, sv, HeKEY(entry), HeKLEN(entry)); | |
463ee0b2 LW |
1718 | return sv; |
1719 | } | |
79072805 | 1720 | } |
fde52b5c | 1721 | return HeVAL(entry); |
79072805 LW |
1722 | } |
1723 | ||
954c1994 GS |
1724 | /* |
1725 | =for apidoc hv_iternextsv | |
1726 | ||
1727 | Performs an C<hv_iternext>, C<hv_iterkey>, and C<hv_iterval> in one | |
1728 | operation. | |
1729 | ||
1730 | =cut | |
1731 | */ | |
1732 | ||
a0d0e21e | 1733 | SV * |
864dbfa3 | 1734 | Perl_hv_iternextsv(pTHX_ HV *hv, char **key, I32 *retlen) |
a0d0e21e LW |
1735 | { |
1736 | HE *he; | |
1737 | if ( (he = hv_iternext(hv)) == NULL) | |
1738 | return NULL; | |
1739 | *key = hv_iterkey(he, retlen); | |
1740 | return hv_iterval(hv, he); | |
1741 | } | |
1742 | ||
954c1994 GS |
1743 | /* |
1744 | =for apidoc hv_magic | |
1745 | ||
1746 | Adds magic to a hash. See C<sv_magic>. | |
1747 | ||
1748 | =cut | |
1749 | */ | |
1750 | ||
79072805 | 1751 | void |
864dbfa3 | 1752 | Perl_hv_magic(pTHX_ HV *hv, GV *gv, int how) |
79072805 | 1753 | { |
a0d0e21e | 1754 | sv_magic((SV*)hv, (SV*)gv, how, Nullch, 0); |
79072805 | 1755 | } |
fde52b5c | 1756 | |
37d85e3a JH |
1757 | #if 0 /* use the macro from hv.h instead */ |
1758 | ||
bbce6d69 | 1759 | char* |
864dbfa3 | 1760 | Perl_sharepvn(pTHX_ const char *sv, I32 len, U32 hash) |
bbce6d69 | 1761 | { |
ff68c719 | 1762 | return HEK_KEY(share_hek(sv, len, hash)); |
bbce6d69 | 1763 | } |
1764 | ||
37d85e3a JH |
1765 | #endif |
1766 | ||
bbce6d69 | 1767 | /* possibly free a shared string if no one has access to it |
fde52b5c | 1768 | * len and hash must both be valid for str. |
1769 | */ | |
bbce6d69 | 1770 | void |
864dbfa3 | 1771 | Perl_unsharepvn(pTHX_ const char *str, I32 len, U32 hash) |
fde52b5c | 1772 | { |
cbec9347 | 1773 | register XPVHV* xhv; |
fde52b5c | 1774 | register HE *entry; |
1775 | register HE **oentry; | |
1776 | register I32 i = 1; | |
1777 | I32 found = 0; | |
c3654f1a | 1778 | bool is_utf8 = FALSE; |
f9a63242 | 1779 | const char *save = str; |
c3654f1a IH |
1780 | |
1781 | if (len < 0) { | |
77caf834 | 1782 | STRLEN tmplen = -len; |
c3654f1a | 1783 | is_utf8 = TRUE; |
77caf834 JH |
1784 | /* See the note in hv_fetch(). --jhi */ |
1785 | str = (char*)bytes_from_utf8((U8*)str, &tmplen, &is_utf8); | |
1786 | len = tmplen; | |
c3654f1a | 1787 | } |
1c846c1f | 1788 | |
fde52b5c | 1789 | /* what follows is the moral equivalent of: |
6b88bc9c | 1790 | if ((Svp = hv_fetch(PL_strtab, tmpsv, FALSE, hash))) { |
bbce6d69 | 1791 | if (--*Svp == Nullsv) |
6b88bc9c | 1792 | hv_delete(PL_strtab, str, len, G_DISCARD, hash); |
bbce6d69 | 1793 | } */ |
cbec9347 | 1794 | xhv = (XPVHV*)SvANY(PL_strtab); |
fde52b5c | 1795 | /* assert(xhv_array != 0) */ |
5f08fbcd | 1796 | LOCK_STRTAB_MUTEX; |
cbec9347 JH |
1797 | /* oentry = &(HvARRAY(hv))[hash & (I32) HvMAX(hv)]; */ |
1798 | oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; | |
bbce6d69 | 1799 | for (entry = *oentry; entry; i=0, oentry = &HeNEXT(entry), entry = *oentry) { |
fde52b5c | 1800 | if (HeHASH(entry) != hash) /* strings can't be equal */ |
1801 | continue; | |
1802 | if (HeKLEN(entry) != len) | |
1803 | continue; | |
1c846c1f | 1804 | if (HeKEY(entry) != str && memNE(HeKEY(entry),str,len)) /* is this it? */ |
fde52b5c | 1805 | continue; |
c3654f1a IH |
1806 | if (HeKUTF8(entry) != (char)is_utf8) |
1807 | continue; | |
fde52b5c | 1808 | found = 1; |
bbce6d69 | 1809 | if (--HeVAL(entry) == Nullsv) { |
1810 | *oentry = HeNEXT(entry); | |
1811 | if (i && !*oentry) | |
cbec9347 | 1812 | xhv->xhv_fill--; /* HvFILL(hv)-- */ |
ff68c719 | 1813 | Safefree(HeKEY_hek(entry)); |
d33b2eba | 1814 | del_HE(entry); |
cbec9347 | 1815 | xhv->xhv_keys--; /* HvKEYS(hv)-- */ |
fde52b5c | 1816 | } |
bbce6d69 | 1817 | break; |
fde52b5c | 1818 | } |
333f433b | 1819 | UNLOCK_STRTAB_MUTEX; |
f9a63242 JH |
1820 | if (str != save) |
1821 | Safefree(str); | |
411caa50 JH |
1822 | if (!found && ckWARN_d(WARN_INTERNAL)) |
1823 | Perl_warner(aTHX_ WARN_INTERNAL, "Attempt to free non-existent shared string '%s'",str); | |
fde52b5c | 1824 | } |
1825 | ||
bbce6d69 | 1826 | /* get a (constant) string ptr from the global string table |
1827 | * string will get added if it is not already there. | |
fde52b5c | 1828 | * len and hash must both be valid for str. |
1829 | */ | |
bbce6d69 | 1830 | HEK * |
864dbfa3 | 1831 | Perl_share_hek(pTHX_ const char *str, I32 len, register U32 hash) |
fde52b5c | 1832 | { |
cbec9347 | 1833 | register XPVHV* xhv; |
fde52b5c | 1834 | register HE *entry; |
1835 | register HE **oentry; | |
1836 | register I32 i = 1; | |
1837 | I32 found = 0; | |
da58a35d | 1838 | bool is_utf8 = FALSE; |
f9a63242 | 1839 | const char *save = str; |
da58a35d JH |
1840 | |
1841 | if (len < 0) { | |
77caf834 | 1842 | STRLEN tmplen = -len; |
da58a35d | 1843 | is_utf8 = TRUE; |
77caf834 JH |
1844 | /* See the note in hv_fetch(). --jhi */ |
1845 | str = (char*)bytes_from_utf8((U8*)str, &tmplen, &is_utf8); | |
1846 | len = tmplen; | |
da58a35d | 1847 | } |
bbce6d69 | 1848 | |
fde52b5c | 1849 | /* what follows is the moral equivalent of: |
1c846c1f | 1850 | |
6b88bc9c | 1851 | if (!(Svp = hv_fetch(PL_strtab, str, len, FALSE))) |
8aacddc1 | 1852 | hv_store(PL_strtab, str, len, Nullsv, hash); |
bbce6d69 | 1853 | */ |
cbec9347 | 1854 | xhv = (XPVHV*)SvANY(PL_strtab); |
fde52b5c | 1855 | /* assert(xhv_array != 0) */ |
5f08fbcd | 1856 | LOCK_STRTAB_MUTEX; |
cbec9347 JH |
1857 | /* oentry = &(HvARRAY(hv))[hash & (I32) HvMAX(hv)]; */ |
1858 | oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; | |
bbce6d69 | 1859 | for (entry = *oentry; entry; i=0, entry = HeNEXT(entry)) { |
fde52b5c | 1860 | if (HeHASH(entry) != hash) /* strings can't be equal */ |
1861 | continue; | |
1862 | if (HeKLEN(entry) != len) | |
1863 | continue; | |
1c846c1f | 1864 | if (HeKEY(entry) != str && memNE(HeKEY(entry),str,len)) /* is this it? */ |
fde52b5c | 1865 | continue; |
c3654f1a IH |
1866 | if (HeKUTF8(entry) != (char)is_utf8) |
1867 | continue; | |
fde52b5c | 1868 | found = 1; |
fde52b5c | 1869 | break; |
1870 | } | |
bbce6d69 | 1871 | if (!found) { |
d33b2eba | 1872 | entry = new_HE(); |
c3654f1a | 1873 | HeKEY_hek(entry) = save_hek(str, is_utf8?-len:len, hash); |
bbce6d69 | 1874 | HeVAL(entry) = Nullsv; |
1875 | HeNEXT(entry) = *oentry; | |
1876 | *oentry = entry; | |
cbec9347 | 1877 | xhv->xhv_keys++; /* HvKEYS(hv)++ */ |
bbce6d69 | 1878 | if (i) { /* initial entry? */ |
cbec9347 JH |
1879 | xhv->xhv_fill++; /* HvFILL(hv)++ */ |
1880 | if (xhv->xhv_keys > xhv->xhv_max /* HvKEYS(hv) > HvMAX(hv) */) | |
1881 | hsplit(PL_strtab); | |
bbce6d69 | 1882 | } |
1883 | } | |
1884 | ||
1885 | ++HeVAL(entry); /* use value slot as REFCNT */ | |
5f08fbcd | 1886 | UNLOCK_STRTAB_MUTEX; |
f9a63242 JH |
1887 | if (str != save) |
1888 | Safefree(str); | |
ff68c719 | 1889 | return HeKEY_hek(entry); |
fde52b5c | 1890 | } |