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