Commit | Line | Data |
a0d0e21e |
1 | /* hv.c |
79072805 |
2 | * |
4eb8286e |
3 | * Copyright (c) 1991-1999, Larry Wall |
79072805 |
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 |
8 | */ |
9 | |
10 | /* |
11 | * "I sit beside the fire and think of all that I have seen." --Bilbo |
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12 | */ |
13 | |
14 | #include "EXTERN.h" |
864dbfa3 |
15 | #define PERL_IN_HV_C |
79072805 |
16 | #include "perl.h" |
17 | |
76e3520e |
18 | STATIC HE* |
cea2e8a9 |
19 | S_new_he(pTHX) |
4633a7c4 |
20 | { |
21 | HE* he; |
333f433b |
22 | LOCK_SV_MUTEX; |
23 | if (!PL_he_root) |
24 | more_he(); |
25 | he = PL_he_root; |
26 | PL_he_root = HeNEXT(he); |
27 | UNLOCK_SV_MUTEX; |
28 | return he; |
4633a7c4 |
29 | } |
30 | |
76e3520e |
31 | STATIC void |
cea2e8a9 |
32 | S_del_he(pTHX_ HE *p) |
4633a7c4 |
33 | { |
333f433b |
34 | LOCK_SV_MUTEX; |
3280af22 |
35 | HeNEXT(p) = (HE*)PL_he_root; |
36 | PL_he_root = p; |
333f433b |
37 | UNLOCK_SV_MUTEX; |
4633a7c4 |
38 | } |
39 | |
333f433b |
40 | STATIC void |
cea2e8a9 |
41 | S_more_he(pTHX) |
4633a7c4 |
42 | { |
43 | register HE* he; |
44 | register HE* heend; |
3280af22 |
45 | New(54, PL_he_root, 1008/sizeof(HE), HE); |
46 | he = PL_he_root; |
4633a7c4 |
47 | heend = &he[1008 / sizeof(HE) - 1]; |
48 | while (he < heend) { |
fde52b5c |
49 | HeNEXT(he) = (HE*)(he + 1); |
4633a7c4 |
50 | he++; |
51 | } |
fde52b5c |
52 | HeNEXT(he) = 0; |
4633a7c4 |
53 | } |
54 | |
76e3520e |
55 | STATIC HEK * |
cea2e8a9 |
56 | S_save_hek(pTHX_ const char *str, I32 len, U32 hash) |
bbce6d69 |
57 | { |
58 | char *k; |
59 | register HEK *hek; |
60 | |
ff68c719 |
61 | New(54, k, HEK_BASESIZE + len + 1, char); |
bbce6d69 |
62 | hek = (HEK*)k; |
ff68c719 |
63 | Copy(str, HEK_KEY(hek), len, char); |
64 | *(HEK_KEY(hek) + len) = '\0'; |
65 | HEK_LEN(hek) = len; |
66 | HEK_HASH(hek) = hash; |
bbce6d69 |
67 | return hek; |
68 | } |
69 | |
70 | void |
864dbfa3 |
71 | Perl_unshare_hek(pTHX_ HEK *hek) |
bbce6d69 |
72 | { |
ff68c719 |
73 | unsharepvn(HEK_KEY(hek),HEK_LEN(hek),HEK_HASH(hek)); |
bbce6d69 |
74 | } |
75 | |
d18c6117 |
76 | #if defined(USE_ITHREADS) |
77 | HE * |
78 | Perl_he_dup(pTHX_ HE *e, bool shared) |
79 | { |
80 | HE *ret; |
81 | |
82 | if (!e) |
83 | return Nullhe; |
84 | ret = new_he(); |
85 | HeNEXT(ret) = (HE*)NULL; |
86 | if (HeKLEN(e) == HEf_SVKEY) |
87 | HeKEY_sv(ret) = SvREFCNT_inc(sv_dup(HeKEY_sv(e))); |
88 | else if (shared) |
89 | HeKEY_hek(ret) = share_hek(HeKEY(e), HeKLEN(e), HeHASH(e)); |
90 | else |
91 | HeKEY_hek(ret) = save_hek(HeKEY(e), HeKLEN(e), HeHASH(e)); |
92 | HeVAL(ret) = SvREFCNT_inc(sv_dup(HeVAL(e))); |
93 | return ret; |
94 | } |
95 | #endif /* USE_ITHREADS */ |
96 | |
fde52b5c |
97 | /* (klen == HEf_SVKEY) is special for MAGICAL hv entries, meaning key slot |
98 | * contains an SV* */ |
99 | |
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100 | SV** |
864dbfa3 |
101 | Perl_hv_fetch(pTHX_ HV *hv, const char *key, U32 klen, I32 lval) |
79072805 |
102 | { |
103 | register XPVHV* xhv; |
fde52b5c |
104 | register U32 hash; |
79072805 |
105 | register HE *entry; |
79072805 |
106 | SV *sv; |
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107 | |
108 | if (!hv) |
109 | return 0; |
463ee0b2 |
110 | |
8990e307 |
111 | if (SvRMAGICAL(hv)) { |
463ee0b2 |
112 | if (mg_find((SV*)hv,'P')) { |
11343788 |
113 | dTHR; |
8990e307 |
114 | sv = sv_newmortal(); |
463ee0b2 |
115 | mg_copy((SV*)hv, sv, key, klen); |
3280af22 |
116 | PL_hv_fetch_sv = sv; |
117 | return &PL_hv_fetch_sv; |
463ee0b2 |
118 | } |
902173a3 |
119 | #ifdef ENV_IS_CASELESS |
120 | else if (mg_find((SV*)hv,'E')) { |
e7152ba2 |
121 | U32 i; |
122 | for (i = 0; i < klen; ++i) |
123 | if (isLOWER(key[i])) { |
79cb57f6 |
124 | char *nkey = strupr(SvPVX(sv_2mortal(newSVpvn(key,klen)))); |
e7152ba2 |
125 | SV **ret = hv_fetch(hv, nkey, klen, 0); |
126 | if (!ret && lval) |
127 | ret = hv_store(hv, key, klen, NEWSV(61,0), 0); |
128 | return ret; |
129 | } |
902173a3 |
130 | } |
131 | #endif |
463ee0b2 |
132 | } |
133 | |
79072805 |
134 | xhv = (XPVHV*)SvANY(hv); |
135 | if (!xhv->xhv_array) { |
a0d0e21e |
136 | if (lval |
137 | #ifdef DYNAMIC_ENV_FETCH /* if it's an %ENV lookup, we may get it on the fly */ |
138 | || (HvNAME(hv) && strEQ(HvNAME(hv),ENV_HV_NAME)) |
139 | #endif |
140 | ) |
d18c6117 |
141 | Newz(503, xhv->xhv_array, |
142 | PERL_HV_ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char); |
79072805 |
143 | else |
144 | return 0; |
145 | } |
146 | |
fde52b5c |
147 | PERL_HASH(hash, key, klen); |
79072805 |
148 | |
a0d0e21e |
149 | entry = ((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; |
fde52b5c |
150 | for (; entry; entry = HeNEXT(entry)) { |
151 | if (HeHASH(entry) != hash) /* strings can't be equal */ |
79072805 |
152 | continue; |
fde52b5c |
153 | if (HeKLEN(entry) != klen) |
79072805 |
154 | continue; |
36477c24 |
155 | if (memNE(HeKEY(entry),key,klen)) /* is this it? */ |
79072805 |
156 | continue; |
fde52b5c |
157 | return &HeVAL(entry); |
79072805 |
158 | } |
a0d0e21e |
159 | #ifdef DYNAMIC_ENV_FETCH /* %ENV lookup? If so, try to fetch the value now */ |
160 | if (HvNAME(hv) && strEQ(HvNAME(hv),ENV_HV_NAME)) { |
a6c40364 |
161 | unsigned long len; |
162 | char *env = PerlEnv_ENVgetenv_len(key,&len); |
163 | if (env) { |
164 | sv = newSVpvn(env,len); |
165 | SvTAINTED_on(sv); |
166 | return hv_store(hv,key,klen,sv,hash); |
167 | } |
a0d0e21e |
168 | } |
169 | #endif |
79072805 |
170 | if (lval) { /* gonna assign to this, so it better be there */ |
171 | sv = NEWSV(61,0); |
e7152ba2 |
172 | return hv_store(hv,key,klen,sv,hash); |
79072805 |
173 | } |
174 | return 0; |
175 | } |
176 | |
fde52b5c |
177 | /* returns a HE * structure with the all fields set */ |
178 | /* note that hent_val will be a mortal sv for MAGICAL hashes */ |
179 | HE * |
864dbfa3 |
180 | Perl_hv_fetch_ent(pTHX_ HV *hv, SV *keysv, I32 lval, register U32 hash) |
fde52b5c |
181 | { |
182 | register XPVHV* xhv; |
183 | register char *key; |
184 | STRLEN klen; |
185 | register HE *entry; |
186 | SV *sv; |
187 | |
188 | if (!hv) |
189 | return 0; |
190 | |
902173a3 |
191 | if (SvRMAGICAL(hv)) { |
192 | if (mg_find((SV*)hv,'P')) { |
6ff68fdd |
193 | dTHR; |
902173a3 |
194 | sv = sv_newmortal(); |
195 | keysv = sv_2mortal(newSVsv(keysv)); |
196 | mg_copy((SV*)hv, sv, (char*)keysv, HEf_SVKEY); |
3280af22 |
197 | if (!HeKEY_hek(&PL_hv_fetch_ent_mh)) { |
902173a3 |
198 | char *k; |
199 | New(54, k, HEK_BASESIZE + sizeof(SV*), char); |
3280af22 |
200 | HeKEY_hek(&PL_hv_fetch_ent_mh) = (HEK*)k; |
902173a3 |
201 | } |
3280af22 |
202 | HeSVKEY_set(&PL_hv_fetch_ent_mh, keysv); |
203 | HeVAL(&PL_hv_fetch_ent_mh) = sv; |
204 | return &PL_hv_fetch_ent_mh; |
1cf368ac |
205 | } |
902173a3 |
206 | #ifdef ENV_IS_CASELESS |
207 | else if (mg_find((SV*)hv,'E')) { |
e7152ba2 |
208 | U32 i; |
902173a3 |
209 | key = SvPV(keysv, klen); |
e7152ba2 |
210 | for (i = 0; i < klen; ++i) |
211 | if (isLOWER(key[i])) { |
79cb57f6 |
212 | SV *nkeysv = sv_2mortal(newSVpvn(key,klen)); |
e7152ba2 |
213 | (void)strupr(SvPVX(nkeysv)); |
214 | entry = hv_fetch_ent(hv, nkeysv, 0, 0); |
215 | if (!entry && lval) |
216 | entry = hv_store_ent(hv, keysv, NEWSV(61,0), hash); |
217 | return entry; |
218 | } |
902173a3 |
219 | } |
220 | #endif |
fde52b5c |
221 | } |
222 | |
effa1e2d |
223 | xhv = (XPVHV*)SvANY(hv); |
fde52b5c |
224 | if (!xhv->xhv_array) { |
225 | if (lval |
226 | #ifdef DYNAMIC_ENV_FETCH /* if it's an %ENV lookup, we may get it on the fly */ |
227 | || (HvNAME(hv) && strEQ(HvNAME(hv),ENV_HV_NAME)) |
228 | #endif |
229 | ) |
d18c6117 |
230 | Newz(503, xhv->xhv_array, |
231 | PERL_HV_ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char); |
fde52b5c |
232 | else |
233 | return 0; |
234 | } |
235 | |
effa1e2d |
236 | key = SvPV(keysv, klen); |
237 | |
238 | if (!hash) |
239 | PERL_HASH(hash, key, klen); |
240 | |
fde52b5c |
241 | entry = ((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; |
242 | for (; entry; entry = HeNEXT(entry)) { |
243 | if (HeHASH(entry) != hash) /* strings can't be equal */ |
244 | continue; |
245 | if (HeKLEN(entry) != klen) |
246 | continue; |
36477c24 |
247 | if (memNE(HeKEY(entry),key,klen)) /* is this it? */ |
fde52b5c |
248 | continue; |
249 | return entry; |
250 | } |
251 | #ifdef DYNAMIC_ENV_FETCH /* %ENV lookup? If so, try to fetch the value now */ |
252 | if (HvNAME(hv) && strEQ(HvNAME(hv),ENV_HV_NAME)) { |
a6c40364 |
253 | unsigned long len; |
254 | char *env = PerlEnv_ENVgetenv_len(key,&len); |
255 | if (env) { |
256 | sv = newSVpvn(env,len); |
257 | SvTAINTED_on(sv); |
258 | return hv_store_ent(hv,keysv,sv,hash); |
259 | } |
fde52b5c |
260 | } |
261 | #endif |
262 | if (lval) { /* gonna assign to this, so it better be there */ |
263 | sv = NEWSV(61,0); |
e7152ba2 |
264 | return hv_store_ent(hv,keysv,sv,hash); |
fde52b5c |
265 | } |
266 | return 0; |
267 | } |
268 | |
864dbfa3 |
269 | STATIC void |
cea2e8a9 |
270 | S_hv_magic_check(pTHX_ HV *hv, bool *needs_copy, bool *needs_store) |
d0066dc7 |
271 | { |
272 | MAGIC *mg = SvMAGIC(hv); |
273 | *needs_copy = FALSE; |
274 | *needs_store = TRUE; |
275 | while (mg) { |
276 | if (isUPPER(mg->mg_type)) { |
277 | *needs_copy = TRUE; |
278 | switch (mg->mg_type) { |
279 | case 'P': |
d0066dc7 |
280 | case 'S': |
281 | *needs_store = FALSE; |
d0066dc7 |
282 | } |
283 | } |
284 | mg = mg->mg_moremagic; |
285 | } |
286 | } |
287 | |
79072805 |
288 | SV** |
864dbfa3 |
289 | Perl_hv_store(pTHX_ HV *hv, const char *key, U32 klen, SV *val, register U32 hash) |
79072805 |
290 | { |
291 | register XPVHV* xhv; |
79072805 |
292 | register I32 i; |
293 | register HE *entry; |
294 | register HE **oentry; |
79072805 |
295 | |
296 | if (!hv) |
297 | return 0; |
298 | |
299 | xhv = (XPVHV*)SvANY(hv); |
463ee0b2 |
300 | if (SvMAGICAL(hv)) { |
d0066dc7 |
301 | bool needs_copy; |
302 | bool needs_store; |
303 | hv_magic_check (hv, &needs_copy, &needs_store); |
304 | if (needs_copy) { |
305 | mg_copy((SV*)hv, val, key, klen); |
306 | if (!xhv->xhv_array && !needs_store) |
307 | return 0; |
902173a3 |
308 | #ifdef ENV_IS_CASELESS |
309 | else if (mg_find((SV*)hv,'E')) { |
79cb57f6 |
310 | SV *sv = sv_2mortal(newSVpvn(key,klen)); |
902173a3 |
311 | key = strupr(SvPVX(sv)); |
312 | hash = 0; |
313 | } |
314 | #endif |
d0066dc7 |
315 | } |
463ee0b2 |
316 | } |
fde52b5c |
317 | if (!hash) |
318 | PERL_HASH(hash, key, klen); |
319 | |
320 | if (!xhv->xhv_array) |
d18c6117 |
321 | Newz(505, xhv->xhv_array, |
322 | PERL_HV_ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char); |
fde52b5c |
323 | |
324 | oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; |
325 | i = 1; |
326 | |
327 | for (entry = *oentry; entry; i=0, entry = HeNEXT(entry)) { |
328 | if (HeHASH(entry) != hash) /* strings can't be equal */ |
329 | continue; |
330 | if (HeKLEN(entry) != klen) |
331 | continue; |
36477c24 |
332 | if (memNE(HeKEY(entry),key,klen)) /* is this it? */ |
fde52b5c |
333 | continue; |
334 | SvREFCNT_dec(HeVAL(entry)); |
335 | HeVAL(entry) = val; |
336 | return &HeVAL(entry); |
337 | } |
338 | |
339 | entry = new_he(); |
fde52b5c |
340 | if (HvSHAREKEYS(hv)) |
ff68c719 |
341 | HeKEY_hek(entry) = share_hek(key, klen, hash); |
fde52b5c |
342 | else /* gotta do the real thing */ |
ff68c719 |
343 | HeKEY_hek(entry) = save_hek(key, klen, hash); |
fde52b5c |
344 | HeVAL(entry) = val; |
fde52b5c |
345 | HeNEXT(entry) = *oentry; |
346 | *oentry = entry; |
347 | |
348 | xhv->xhv_keys++; |
349 | if (i) { /* initial entry? */ |
350 | ++xhv->xhv_fill; |
351 | if (xhv->xhv_keys > xhv->xhv_max) |
352 | hsplit(hv); |
79072805 |
353 | } |
354 | |
fde52b5c |
355 | return &HeVAL(entry); |
356 | } |
357 | |
358 | HE * |
864dbfa3 |
359 | Perl_hv_store_ent(pTHX_ HV *hv, SV *keysv, SV *val, register U32 hash) |
fde52b5c |
360 | { |
361 | register XPVHV* xhv; |
362 | register char *key; |
363 | STRLEN klen; |
364 | register I32 i; |
365 | register HE *entry; |
366 | register HE **oentry; |
367 | |
368 | if (!hv) |
369 | return 0; |
370 | |
371 | xhv = (XPVHV*)SvANY(hv); |
372 | if (SvMAGICAL(hv)) { |
aeea060c |
373 | dTHR; |
d0066dc7 |
374 | bool needs_copy; |
375 | bool needs_store; |
376 | hv_magic_check (hv, &needs_copy, &needs_store); |
377 | if (needs_copy) { |
3280af22 |
378 | bool save_taint = PL_tainted; |
379 | if (PL_tainting) |
380 | PL_tainted = SvTAINTED(keysv); |
d0066dc7 |
381 | keysv = sv_2mortal(newSVsv(keysv)); |
382 | mg_copy((SV*)hv, val, (char*)keysv, HEf_SVKEY); |
383 | TAINT_IF(save_taint); |
384 | if (!xhv->xhv_array && !needs_store) |
385 | return Nullhe; |
902173a3 |
386 | #ifdef ENV_IS_CASELESS |
387 | else if (mg_find((SV*)hv,'E')) { |
388 | key = SvPV(keysv, klen); |
79cb57f6 |
389 | keysv = sv_2mortal(newSVpvn(key,klen)); |
902173a3 |
390 | (void)strupr(SvPVX(keysv)); |
391 | hash = 0; |
392 | } |
393 | #endif |
394 | } |
fde52b5c |
395 | } |
396 | |
397 | key = SvPV(keysv, klen); |
902173a3 |
398 | |
fde52b5c |
399 | if (!hash) |
400 | PERL_HASH(hash, key, klen); |
401 | |
79072805 |
402 | if (!xhv->xhv_array) |
d18c6117 |
403 | Newz(505, xhv->xhv_array, |
404 | PERL_HV_ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char); |
79072805 |
405 | |
a0d0e21e |
406 | oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; |
79072805 |
407 | i = 1; |
408 | |
fde52b5c |
409 | for (entry = *oentry; entry; i=0, entry = HeNEXT(entry)) { |
410 | if (HeHASH(entry) != hash) /* strings can't be equal */ |
79072805 |
411 | continue; |
fde52b5c |
412 | if (HeKLEN(entry) != klen) |
79072805 |
413 | continue; |
36477c24 |
414 | if (memNE(HeKEY(entry),key,klen)) /* is this it? */ |
79072805 |
415 | continue; |
fde52b5c |
416 | SvREFCNT_dec(HeVAL(entry)); |
417 | HeVAL(entry) = val; |
418 | return entry; |
79072805 |
419 | } |
79072805 |
420 | |
4633a7c4 |
421 | entry = new_he(); |
fde52b5c |
422 | if (HvSHAREKEYS(hv)) |
ff68c719 |
423 | HeKEY_hek(entry) = share_hek(key, klen, hash); |
fde52b5c |
424 | else /* gotta do the real thing */ |
ff68c719 |
425 | HeKEY_hek(entry) = save_hek(key, klen, hash); |
fde52b5c |
426 | HeVAL(entry) = val; |
fde52b5c |
427 | HeNEXT(entry) = *oentry; |
79072805 |
428 | *oentry = entry; |
429 | |
463ee0b2 |
430 | xhv->xhv_keys++; |
79072805 |
431 | if (i) { /* initial entry? */ |
463ee0b2 |
432 | ++xhv->xhv_fill; |
433 | if (xhv->xhv_keys > xhv->xhv_max) |
79072805 |
434 | hsplit(hv); |
435 | } |
79072805 |
436 | |
fde52b5c |
437 | return entry; |
79072805 |
438 | } |
439 | |
440 | SV * |
864dbfa3 |
441 | Perl_hv_delete(pTHX_ HV *hv, const char *key, U32 klen, I32 flags) |
79072805 |
442 | { |
443 | register XPVHV* xhv; |
79072805 |
444 | register I32 i; |
fde52b5c |
445 | register U32 hash; |
79072805 |
446 | register HE *entry; |
447 | register HE **oentry; |
67a38de0 |
448 | SV **svp; |
79072805 |
449 | SV *sv; |
79072805 |
450 | |
451 | if (!hv) |
452 | return Nullsv; |
8990e307 |
453 | if (SvRMAGICAL(hv)) { |
0a0bb7c7 |
454 | bool needs_copy; |
455 | bool needs_store; |
456 | hv_magic_check (hv, &needs_copy, &needs_store); |
457 | |
67a38de0 |
458 | if (needs_copy && (svp = hv_fetch(hv, key, klen, TRUE))) { |
459 | sv = *svp; |
0a0bb7c7 |
460 | mg_clear(sv); |
461 | if (!needs_store) { |
462 | if (mg_find(sv, 'p')) { |
463 | sv_unmagic(sv, 'p'); /* No longer an element */ |
464 | return sv; |
465 | } |
466 | return Nullsv; /* element cannot be deleted */ |
467 | } |
902173a3 |
468 | #ifdef ENV_IS_CASELESS |
2fd1c6b8 |
469 | else if (mg_find((SV*)hv,'E')) { |
79cb57f6 |
470 | sv = sv_2mortal(newSVpvn(key,klen)); |
2fd1c6b8 |
471 | key = strupr(SvPVX(sv)); |
472 | } |
902173a3 |
473 | #endif |
2fd1c6b8 |
474 | } |
463ee0b2 |
475 | } |
79072805 |
476 | xhv = (XPVHV*)SvANY(hv); |
477 | if (!xhv->xhv_array) |
478 | return Nullsv; |
fde52b5c |
479 | |
480 | PERL_HASH(hash, key, klen); |
79072805 |
481 | |
a0d0e21e |
482 | oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; |
79072805 |
483 | entry = *oentry; |
484 | i = 1; |
fde52b5c |
485 | for (; entry; i=0, oentry = &HeNEXT(entry), entry = *oentry) { |
486 | if (HeHASH(entry) != hash) /* strings can't be equal */ |
79072805 |
487 | continue; |
fde52b5c |
488 | if (HeKLEN(entry) != klen) |
79072805 |
489 | continue; |
36477c24 |
490 | if (memNE(HeKEY(entry),key,klen)) /* is this it? */ |
79072805 |
491 | continue; |
fde52b5c |
492 | *oentry = HeNEXT(entry); |
79072805 |
493 | if (i && !*oentry) |
494 | xhv->xhv_fill--; |
748a9306 |
495 | if (flags & G_DISCARD) |
496 | sv = Nullsv; |
497 | else |
fde52b5c |
498 | sv = sv_mortalcopy(HeVAL(entry)); |
a0d0e21e |
499 | if (entry == xhv->xhv_eiter) |
72940dca |
500 | HvLAZYDEL_on(hv); |
a0d0e21e |
501 | else |
68dc0745 |
502 | hv_free_ent(hv, entry); |
fde52b5c |
503 | --xhv->xhv_keys; |
504 | return sv; |
505 | } |
506 | return Nullsv; |
507 | } |
508 | |
509 | SV * |
864dbfa3 |
510 | Perl_hv_delete_ent(pTHX_ HV *hv, SV *keysv, I32 flags, U32 hash) |
fde52b5c |
511 | { |
512 | register XPVHV* xhv; |
513 | register I32 i; |
514 | register char *key; |
515 | STRLEN klen; |
516 | register HE *entry; |
517 | register HE **oentry; |
518 | SV *sv; |
519 | |
520 | if (!hv) |
521 | return Nullsv; |
522 | if (SvRMAGICAL(hv)) { |
0a0bb7c7 |
523 | bool needs_copy; |
524 | bool needs_store; |
525 | hv_magic_check (hv, &needs_copy, &needs_store); |
526 | |
67a38de0 |
527 | if (needs_copy && (entry = hv_fetch_ent(hv, keysv, TRUE, hash))) { |
0a0bb7c7 |
528 | sv = HeVAL(entry); |
529 | mg_clear(sv); |
530 | if (!needs_store) { |
531 | if (mg_find(sv, 'p')) { |
532 | sv_unmagic(sv, 'p'); /* No longer an element */ |
533 | return sv; |
534 | } |
535 | return Nullsv; /* element cannot be deleted */ |
536 | } |
902173a3 |
537 | #ifdef ENV_IS_CASELESS |
2fd1c6b8 |
538 | else if (mg_find((SV*)hv,'E')) { |
539 | key = SvPV(keysv, klen); |
79cb57f6 |
540 | keysv = sv_2mortal(newSVpvn(key,klen)); |
2fd1c6b8 |
541 | (void)strupr(SvPVX(keysv)); |
542 | hash = 0; |
543 | } |
902173a3 |
544 | #endif |
2fd1c6b8 |
545 | } |
fde52b5c |
546 | } |
547 | xhv = (XPVHV*)SvANY(hv); |
548 | if (!xhv->xhv_array) |
549 | return Nullsv; |
550 | |
551 | key = SvPV(keysv, klen); |
552 | |
553 | if (!hash) |
554 | PERL_HASH(hash, key, klen); |
555 | |
556 | oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; |
557 | entry = *oentry; |
558 | i = 1; |
559 | for (; entry; i=0, oentry = &HeNEXT(entry), entry = *oentry) { |
560 | if (HeHASH(entry) != hash) /* strings can't be equal */ |
561 | continue; |
562 | if (HeKLEN(entry) != klen) |
563 | continue; |
36477c24 |
564 | if (memNE(HeKEY(entry),key,klen)) /* is this it? */ |
fde52b5c |
565 | continue; |
566 | *oentry = HeNEXT(entry); |
567 | if (i && !*oentry) |
568 | xhv->xhv_fill--; |
569 | if (flags & G_DISCARD) |
570 | sv = Nullsv; |
571 | else |
572 | sv = sv_mortalcopy(HeVAL(entry)); |
573 | if (entry == xhv->xhv_eiter) |
72940dca |
574 | HvLAZYDEL_on(hv); |
fde52b5c |
575 | else |
68dc0745 |
576 | hv_free_ent(hv, entry); |
463ee0b2 |
577 | --xhv->xhv_keys; |
79072805 |
578 | return sv; |
579 | } |
79072805 |
580 | return Nullsv; |
79072805 |
581 | } |
582 | |
a0d0e21e |
583 | bool |
864dbfa3 |
584 | Perl_hv_exists(pTHX_ HV *hv, const char *key, U32 klen) |
a0d0e21e |
585 | { |
586 | register XPVHV* xhv; |
fde52b5c |
587 | register U32 hash; |
a0d0e21e |
588 | register HE *entry; |
589 | SV *sv; |
590 | |
591 | if (!hv) |
592 | return 0; |
593 | |
594 | if (SvRMAGICAL(hv)) { |
595 | if (mg_find((SV*)hv,'P')) { |
11343788 |
596 | dTHR; |
a0d0e21e |
597 | sv = sv_newmortal(); |
598 | mg_copy((SV*)hv, sv, key, klen); |
599 | magic_existspack(sv, mg_find(sv, 'p')); |
600 | return SvTRUE(sv); |
601 | } |
902173a3 |
602 | #ifdef ENV_IS_CASELESS |
603 | else if (mg_find((SV*)hv,'E')) { |
79cb57f6 |
604 | sv = sv_2mortal(newSVpvn(key,klen)); |
902173a3 |
605 | key = strupr(SvPVX(sv)); |
606 | } |
607 | #endif |
a0d0e21e |
608 | } |
609 | |
610 | xhv = (XPVHV*)SvANY(hv); |
f675dbe5 |
611 | #ifndef DYNAMIC_ENV_FETCH |
a0d0e21e |
612 | if (!xhv->xhv_array) |
613 | return 0; |
f675dbe5 |
614 | #endif |
a0d0e21e |
615 | |
fde52b5c |
616 | PERL_HASH(hash, key, klen); |
a0d0e21e |
617 | |
f675dbe5 |
618 | #ifdef DYNAMIC_ENV_FETCH |
619 | if (!xhv->xhv_array) entry = Null(HE*); |
620 | else |
621 | #endif |
a0d0e21e |
622 | entry = ((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; |
fde52b5c |
623 | for (; entry; entry = HeNEXT(entry)) { |
624 | if (HeHASH(entry) != hash) /* strings can't be equal */ |
a0d0e21e |
625 | continue; |
fde52b5c |
626 | if (HeKLEN(entry) != klen) |
a0d0e21e |
627 | continue; |
36477c24 |
628 | if (memNE(HeKEY(entry),key,klen)) /* is this it? */ |
fde52b5c |
629 | continue; |
630 | return TRUE; |
631 | } |
f675dbe5 |
632 | #ifdef DYNAMIC_ENV_FETCH /* is it out there? */ |
a6c40364 |
633 | if (HvNAME(hv) && strEQ(HvNAME(hv), ENV_HV_NAME)) { |
634 | unsigned long len; |
635 | char *env = PerlEnv_ENVgetenv_len(key,&len); |
636 | if (env) { |
637 | sv = newSVpvn(env,len); |
638 | SvTAINTED_on(sv); |
639 | (void)hv_store(hv,key,klen,sv,hash); |
640 | return TRUE; |
641 | } |
f675dbe5 |
642 | } |
643 | #endif |
fde52b5c |
644 | return FALSE; |
645 | } |
646 | |
647 | |
648 | bool |
864dbfa3 |
649 | Perl_hv_exists_ent(pTHX_ HV *hv, SV *keysv, U32 hash) |
fde52b5c |
650 | { |
651 | register XPVHV* xhv; |
652 | register char *key; |
653 | STRLEN klen; |
654 | register HE *entry; |
655 | SV *sv; |
656 | |
657 | if (!hv) |
658 | return 0; |
659 | |
660 | if (SvRMAGICAL(hv)) { |
661 | if (mg_find((SV*)hv,'P')) { |
e858de61 |
662 | dTHR; /* just for SvTRUE */ |
fde52b5c |
663 | sv = sv_newmortal(); |
effa1e2d |
664 | keysv = sv_2mortal(newSVsv(keysv)); |
fde52b5c |
665 | mg_copy((SV*)hv, sv, (char*)keysv, HEf_SVKEY); |
666 | magic_existspack(sv, mg_find(sv, 'p')); |
667 | return SvTRUE(sv); |
668 | } |
902173a3 |
669 | #ifdef ENV_IS_CASELESS |
670 | else if (mg_find((SV*)hv,'E')) { |
671 | key = SvPV(keysv, klen); |
79cb57f6 |
672 | keysv = sv_2mortal(newSVpvn(key,klen)); |
902173a3 |
673 | (void)strupr(SvPVX(keysv)); |
674 | hash = 0; |
675 | } |
676 | #endif |
fde52b5c |
677 | } |
678 | |
679 | xhv = (XPVHV*)SvANY(hv); |
f675dbe5 |
680 | #ifndef DYNAMIC_ENV_FETCH |
fde52b5c |
681 | if (!xhv->xhv_array) |
682 | return 0; |
f675dbe5 |
683 | #endif |
fde52b5c |
684 | |
685 | key = SvPV(keysv, klen); |
686 | if (!hash) |
687 | PERL_HASH(hash, key, klen); |
688 | |
f675dbe5 |
689 | #ifdef DYNAMIC_ENV_FETCH |
690 | if (!xhv->xhv_array) entry = Null(HE*); |
691 | else |
692 | #endif |
fde52b5c |
693 | entry = ((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; |
694 | for (; entry; entry = HeNEXT(entry)) { |
695 | if (HeHASH(entry) != hash) /* strings can't be equal */ |
696 | continue; |
697 | if (HeKLEN(entry) != klen) |
698 | continue; |
36477c24 |
699 | if (memNE(HeKEY(entry),key,klen)) /* is this it? */ |
a0d0e21e |
700 | continue; |
701 | return TRUE; |
702 | } |
f675dbe5 |
703 | #ifdef DYNAMIC_ENV_FETCH /* is it out there? */ |
a6c40364 |
704 | if (HvNAME(hv) && strEQ(HvNAME(hv), ENV_HV_NAME)) { |
705 | unsigned long len; |
706 | char *env = PerlEnv_ENVgetenv_len(key,&len); |
707 | if (env) { |
708 | sv = newSVpvn(env,len); |
709 | SvTAINTED_on(sv); |
710 | (void)hv_store_ent(hv,keysv,sv,hash); |
711 | return TRUE; |
712 | } |
f675dbe5 |
713 | } |
714 | #endif |
a0d0e21e |
715 | return FALSE; |
716 | } |
717 | |
76e3520e |
718 | STATIC void |
cea2e8a9 |
719 | S_hsplit(pTHX_ HV *hv) |
79072805 |
720 | { |
721 | register XPVHV* xhv = (XPVHV*)SvANY(hv); |
a0d0e21e |
722 | I32 oldsize = (I32) xhv->xhv_max + 1; /* sic(k) */ |
79072805 |
723 | register I32 newsize = oldsize * 2; |
724 | register I32 i; |
72311751 |
725 | register char *a = xhv->xhv_array; |
726 | register HE **aep; |
727 | register HE **bep; |
79072805 |
728 | register HE *entry; |
729 | register HE **oentry; |
730 | |
3280af22 |
731 | PL_nomemok = TRUE; |
8d6dde3e |
732 | #if defined(STRANGE_MALLOC) || defined(MYMALLOC) |
d18c6117 |
733 | Renew(a, PERL_HV_ARRAY_ALLOC_BYTES(newsize), char); |
422a93e5 |
734 | if (!a) { |
4a33f861 |
735 | PL_nomemok = FALSE; |
422a93e5 |
736 | return; |
737 | } |
4633a7c4 |
738 | #else |
4633a7c4 |
739 | #define MALLOC_OVERHEAD 16 |
d18c6117 |
740 | New(2, a, PERL_HV_ARRAY_ALLOC_BYTES(newsize), char); |
422a93e5 |
741 | if (!a) { |
3280af22 |
742 | PL_nomemok = FALSE; |
422a93e5 |
743 | return; |
744 | } |
72311751 |
745 | Copy(xhv->xhv_array, a, oldsize * sizeof(HE*), char); |
fba3b22e |
746 | if (oldsize >= 64) { |
d18c6117 |
747 | offer_nice_chunk(xhv->xhv_array, PERL_HV_ARRAY_ALLOC_BYTES(oldsize)); |
4633a7c4 |
748 | } |
749 | else |
750 | Safefree(xhv->xhv_array); |
751 | #endif |
752 | |
3280af22 |
753 | PL_nomemok = FALSE; |
72311751 |
754 | Zero(&a[oldsize * sizeof(HE*)], (newsize-oldsize) * sizeof(HE*), char); /* zero 2nd half*/ |
79072805 |
755 | xhv->xhv_max = --newsize; |
72311751 |
756 | xhv->xhv_array = a; |
757 | aep = (HE**)a; |
79072805 |
758 | |
72311751 |
759 | for (i=0; i<oldsize; i++,aep++) { |
760 | if (!*aep) /* non-existent */ |
79072805 |
761 | continue; |
72311751 |
762 | bep = aep+oldsize; |
763 | for (oentry = aep, entry = *aep; entry; entry = *oentry) { |
fde52b5c |
764 | if ((HeHASH(entry) & newsize) != i) { |
765 | *oentry = HeNEXT(entry); |
72311751 |
766 | HeNEXT(entry) = *bep; |
767 | if (!*bep) |
79072805 |
768 | xhv->xhv_fill++; |
72311751 |
769 | *bep = entry; |
79072805 |
770 | continue; |
771 | } |
772 | else |
fde52b5c |
773 | oentry = &HeNEXT(entry); |
79072805 |
774 | } |
72311751 |
775 | if (!*aep) /* everything moved */ |
79072805 |
776 | xhv->xhv_fill--; |
777 | } |
778 | } |
779 | |
72940dca |
780 | void |
864dbfa3 |
781 | Perl_hv_ksplit(pTHX_ HV *hv, IV newmax) |
72940dca |
782 | { |
783 | register XPVHV* xhv = (XPVHV*)SvANY(hv); |
784 | I32 oldsize = (I32) xhv->xhv_max + 1; /* sic(k) */ |
785 | register I32 newsize; |
786 | register I32 i; |
787 | register I32 j; |
72311751 |
788 | register char *a; |
789 | register HE **aep; |
72940dca |
790 | register HE *entry; |
791 | register HE **oentry; |
792 | |
793 | newsize = (I32) newmax; /* possible truncation here */ |
794 | if (newsize != newmax || newmax <= oldsize) |
795 | return; |
796 | while ((newsize & (1 + ~newsize)) != newsize) { |
797 | newsize &= ~(newsize & (1 + ~newsize)); /* get proper power of 2 */ |
798 | } |
799 | if (newsize < newmax) |
800 | newsize *= 2; |
801 | if (newsize < newmax) |
802 | return; /* overflow detection */ |
803 | |
72311751 |
804 | a = xhv->xhv_array; |
72940dca |
805 | if (a) { |
3280af22 |
806 | PL_nomemok = TRUE; |
8d6dde3e |
807 | #if defined(STRANGE_MALLOC) || defined(MYMALLOC) |
d18c6117 |
808 | Renew(a, PERL_HV_ARRAY_ALLOC_BYTES(newsize), char); |
422a93e5 |
809 | if (!a) { |
4a33f861 |
810 | PL_nomemok = FALSE; |
422a93e5 |
811 | return; |
812 | } |
72940dca |
813 | #else |
d18c6117 |
814 | New(2, a, PERL_HV_ARRAY_ALLOC_BYTES(newsize), char); |
422a93e5 |
815 | if (!a) { |
3280af22 |
816 | PL_nomemok = FALSE; |
422a93e5 |
817 | return; |
818 | } |
72311751 |
819 | Copy(xhv->xhv_array, a, oldsize * sizeof(HE*), char); |
fba3b22e |
820 | if (oldsize >= 64) { |
d18c6117 |
821 | offer_nice_chunk(xhv->xhv_array, PERL_HV_ARRAY_ALLOC_BYTES(oldsize)); |
72940dca |
822 | } |
823 | else |
824 | Safefree(xhv->xhv_array); |
825 | #endif |
3280af22 |
826 | PL_nomemok = FALSE; |
72311751 |
827 | Zero(&a[oldsize * sizeof(HE*)], (newsize-oldsize) * sizeof(HE*), char); /* zero 2nd half*/ |
72940dca |
828 | } |
829 | else { |
d18c6117 |
830 | Newz(0, a, PERL_HV_ARRAY_ALLOC_BYTES(newsize), char); |
72940dca |
831 | } |
832 | xhv->xhv_max = --newsize; |
72311751 |
833 | xhv->xhv_array = a; |
72940dca |
834 | if (!xhv->xhv_fill) /* skip rest if no entries */ |
835 | return; |
836 | |
72311751 |
837 | aep = (HE**)a; |
838 | for (i=0; i<oldsize; i++,aep++) { |
839 | if (!*aep) /* non-existent */ |
72940dca |
840 | continue; |
72311751 |
841 | for (oentry = aep, entry = *aep; entry; entry = *oentry) { |
72940dca |
842 | if ((j = (HeHASH(entry) & newsize)) != i) { |
843 | j -= i; |
844 | *oentry = HeNEXT(entry); |
72311751 |
845 | if (!(HeNEXT(entry) = aep[j])) |
72940dca |
846 | xhv->xhv_fill++; |
72311751 |
847 | aep[j] = entry; |
72940dca |
848 | continue; |
849 | } |
850 | else |
851 | oentry = &HeNEXT(entry); |
852 | } |
72311751 |
853 | if (!*aep) /* everything moved */ |
72940dca |
854 | xhv->xhv_fill--; |
855 | } |
856 | } |
857 | |
79072805 |
858 | HV * |
864dbfa3 |
859 | Perl_newHV(pTHX) |
79072805 |
860 | { |
861 | register HV *hv; |
862 | register XPVHV* xhv; |
863 | |
a0d0e21e |
864 | hv = (HV*)NEWSV(502,0); |
865 | sv_upgrade((SV *)hv, SVt_PVHV); |
79072805 |
866 | xhv = (XPVHV*)SvANY(hv); |
867 | SvPOK_off(hv); |
868 | SvNOK_off(hv); |
fde52b5c |
869 | #ifndef NODEFAULT_SHAREKEYS |
870 | HvSHAREKEYS_on(hv); /* key-sharing on by default */ |
871 | #endif |
463ee0b2 |
872 | xhv->xhv_max = 7; /* start with 8 buckets */ |
79072805 |
873 | xhv->xhv_fill = 0; |
874 | xhv->xhv_pmroot = 0; |
79072805 |
875 | (void)hv_iterinit(hv); /* so each() will start off right */ |
876 | return hv; |
877 | } |
878 | |
b3ac6de7 |
879 | HV * |
864dbfa3 |
880 | Perl_newHVhv(pTHX_ HV *ohv) |
b3ac6de7 |
881 | { |
882 | register HV *hv; |
b3ac6de7 |
883 | STRLEN hv_max = ohv ? HvMAX(ohv) : 0; |
884 | STRLEN hv_fill = ohv ? HvFILL(ohv) : 0; |
885 | |
886 | hv = newHV(); |
887 | while (hv_max && hv_max + 1 >= hv_fill * 2) |
888 | hv_max = hv_max / 2; /* Is always 2^n-1 */ |
4a76a316 |
889 | HvMAX(hv) = hv_max; |
b3ac6de7 |
890 | if (!hv_fill) |
891 | return hv; |
892 | |
893 | #if 0 |
33c27489 |
894 | if (! SvTIED_mg((SV*)ohv, 'P')) { |
b3ac6de7 |
895 | /* Quick way ???*/ |
896 | } |
897 | else |
898 | #endif |
899 | { |
900 | HE *entry; |
901 | I32 hv_riter = HvRITER(ohv); /* current root of iterator */ |
902 | HE *hv_eiter = HvEITER(ohv); /* current entry of iterator */ |
903 | |
904 | /* Slow way */ |
4a76a316 |
905 | hv_iterinit(ohv); |
b3ac6de7 |
906 | while (entry = hv_iternext(ohv)) { |
907 | hv_store(hv, HeKEY(entry), HeKLEN(entry), |
908 | SvREFCNT_inc(HeVAL(entry)), HeHASH(entry)); |
909 | } |
910 | HvRITER(ohv) = hv_riter; |
911 | HvEITER(ohv) = hv_eiter; |
912 | } |
913 | |
914 | return hv; |
915 | } |
916 | |
79072805 |
917 | void |
864dbfa3 |
918 | Perl_hv_free_ent(pTHX_ HV *hv, register HE *entry) |
79072805 |
919 | { |
16bdeea2 |
920 | SV *val; |
921 | |
68dc0745 |
922 | if (!entry) |
79072805 |
923 | return; |
16bdeea2 |
924 | val = HeVAL(entry); |
257c9e5b |
925 | if (val && isGV(val) && GvCVu(val) && HvNAME(hv)) |
3280af22 |
926 | PL_sub_generation++; /* may be deletion of method from stash */ |
16bdeea2 |
927 | SvREFCNT_dec(val); |
68dc0745 |
928 | if (HeKLEN(entry) == HEf_SVKEY) { |
929 | SvREFCNT_dec(HeKEY_sv(entry)); |
930 | Safefree(HeKEY_hek(entry)); |
44a8e56a |
931 | } |
932 | else if (HvSHAREKEYS(hv)) |
68dc0745 |
933 | unshare_hek(HeKEY_hek(entry)); |
fde52b5c |
934 | else |
68dc0745 |
935 | Safefree(HeKEY_hek(entry)); |
936 | del_he(entry); |
79072805 |
937 | } |
938 | |
939 | void |
864dbfa3 |
940 | Perl_hv_delayfree_ent(pTHX_ HV *hv, register HE *entry) |
79072805 |
941 | { |
68dc0745 |
942 | if (!entry) |
79072805 |
943 | return; |
68dc0745 |
944 | if (isGV(HeVAL(entry)) && GvCVu(HeVAL(entry)) && HvNAME(hv)) |
3280af22 |
945 | PL_sub_generation++; /* may be deletion of method from stash */ |
68dc0745 |
946 | sv_2mortal(HeVAL(entry)); /* free between statements */ |
947 | if (HeKLEN(entry) == HEf_SVKEY) { |
948 | sv_2mortal(HeKEY_sv(entry)); |
949 | Safefree(HeKEY_hek(entry)); |
44a8e56a |
950 | } |
951 | else if (HvSHAREKEYS(hv)) |
68dc0745 |
952 | unshare_hek(HeKEY_hek(entry)); |
fde52b5c |
953 | else |
68dc0745 |
954 | Safefree(HeKEY_hek(entry)); |
955 | del_he(entry); |
79072805 |
956 | } |
957 | |
958 | void |
864dbfa3 |
959 | Perl_hv_clear(pTHX_ HV *hv) |
79072805 |
960 | { |
961 | register XPVHV* xhv; |
962 | if (!hv) |
963 | return; |
964 | xhv = (XPVHV*)SvANY(hv); |
463ee0b2 |
965 | hfreeentries(hv); |
79072805 |
966 | xhv->xhv_fill = 0; |
a0d0e21e |
967 | xhv->xhv_keys = 0; |
79072805 |
968 | if (xhv->xhv_array) |
463ee0b2 |
969 | (void)memzero(xhv->xhv_array, (xhv->xhv_max + 1) * sizeof(HE*)); |
a0d0e21e |
970 | |
971 | if (SvRMAGICAL(hv)) |
972 | mg_clear((SV*)hv); |
79072805 |
973 | } |
974 | |
76e3520e |
975 | STATIC void |
cea2e8a9 |
976 | S_hfreeentries(pTHX_ HV *hv) |
79072805 |
977 | { |
a0d0e21e |
978 | register HE **array; |
68dc0745 |
979 | register HE *entry; |
980 | register HE *oentry = Null(HE*); |
a0d0e21e |
981 | I32 riter; |
982 | I32 max; |
79072805 |
983 | |
984 | if (!hv) |
985 | return; |
a0d0e21e |
986 | if (!HvARRAY(hv)) |
79072805 |
987 | return; |
a0d0e21e |
988 | |
989 | riter = 0; |
990 | max = HvMAX(hv); |
991 | array = HvARRAY(hv); |
68dc0745 |
992 | entry = array[0]; |
a0d0e21e |
993 | for (;;) { |
68dc0745 |
994 | if (entry) { |
995 | oentry = entry; |
996 | entry = HeNEXT(entry); |
997 | hv_free_ent(hv, oentry); |
a0d0e21e |
998 | } |
68dc0745 |
999 | if (!entry) { |
a0d0e21e |
1000 | if (++riter > max) |
1001 | break; |
68dc0745 |
1002 | entry = array[riter]; |
a0d0e21e |
1003 | } |
79072805 |
1004 | } |
a0d0e21e |
1005 | (void)hv_iterinit(hv); |
79072805 |
1006 | } |
1007 | |
1008 | void |
864dbfa3 |
1009 | Perl_hv_undef(pTHX_ HV *hv) |
79072805 |
1010 | { |
1011 | register XPVHV* xhv; |
1012 | if (!hv) |
1013 | return; |
1014 | xhv = (XPVHV*)SvANY(hv); |
463ee0b2 |
1015 | hfreeentries(hv); |
79072805 |
1016 | Safefree(xhv->xhv_array); |
85e6fe83 |
1017 | if (HvNAME(hv)) { |
1018 | Safefree(HvNAME(hv)); |
1019 | HvNAME(hv) = 0; |
1020 | } |
79072805 |
1021 | xhv->xhv_array = 0; |
aa689395 |
1022 | xhv->xhv_max = 7; /* it's a normal hash */ |
79072805 |
1023 | xhv->xhv_fill = 0; |
a0d0e21e |
1024 | xhv->xhv_keys = 0; |
1025 | |
1026 | if (SvRMAGICAL(hv)) |
1027 | mg_clear((SV*)hv); |
79072805 |
1028 | } |
1029 | |
79072805 |
1030 | I32 |
864dbfa3 |
1031 | Perl_hv_iterinit(pTHX_ HV *hv) |
79072805 |
1032 | { |
aa689395 |
1033 | register XPVHV* xhv; |
1034 | HE *entry; |
1035 | |
1036 | if (!hv) |
cea2e8a9 |
1037 | Perl_croak(aTHX_ "Bad hash"); |
aa689395 |
1038 | xhv = (XPVHV*)SvANY(hv); |
1039 | entry = xhv->xhv_eiter; |
72940dca |
1040 | if (entry && HvLAZYDEL(hv)) { /* was deleted earlier? */ |
1041 | HvLAZYDEL_off(hv); |
68dc0745 |
1042 | hv_free_ent(hv, entry); |
72940dca |
1043 | } |
79072805 |
1044 | xhv->xhv_riter = -1; |
1045 | xhv->xhv_eiter = Null(HE*); |
c6601927 |
1046 | return xhv->xhv_keys; /* used to be xhv->xhv_fill before 5.004_65 */ |
79072805 |
1047 | } |
1048 | |
1049 | HE * |
864dbfa3 |
1050 | Perl_hv_iternext(pTHX_ HV *hv) |
79072805 |
1051 | { |
1052 | register XPVHV* xhv; |
1053 | register HE *entry; |
a0d0e21e |
1054 | HE *oldentry; |
463ee0b2 |
1055 | MAGIC* mg; |
79072805 |
1056 | |
1057 | if (!hv) |
cea2e8a9 |
1058 | Perl_croak(aTHX_ "Bad hash"); |
79072805 |
1059 | xhv = (XPVHV*)SvANY(hv); |
a0d0e21e |
1060 | oldentry = entry = xhv->xhv_eiter; |
463ee0b2 |
1061 | |
33c27489 |
1062 | if (mg = SvTIED_mg((SV*)hv, 'P')) { |
8990e307 |
1063 | SV *key = sv_newmortal(); |
cd1469e6 |
1064 | if (entry) { |
fde52b5c |
1065 | sv_setsv(key, HeSVKEY_force(entry)); |
cd1469e6 |
1066 | SvREFCNT_dec(HeSVKEY(entry)); /* get rid of previous key */ |
1067 | } |
a0d0e21e |
1068 | else { |
ff68c719 |
1069 | char *k; |
bbce6d69 |
1070 | HEK *hek; |
ff68c719 |
1071 | |
1072 | xhv->xhv_eiter = entry = new_he(); /* one HE per MAGICAL hash */ |
4633a7c4 |
1073 | Zero(entry, 1, HE); |
ff68c719 |
1074 | Newz(54, k, HEK_BASESIZE + sizeof(SV*), char); |
1075 | hek = (HEK*)k; |
1076 | HeKEY_hek(entry) = hek; |
fde52b5c |
1077 | HeKLEN(entry) = HEf_SVKEY; |
a0d0e21e |
1078 | } |
1079 | magic_nextpack((SV*) hv,mg,key); |
463ee0b2 |
1080 | if (SvOK(key)) { |
cd1469e6 |
1081 | /* force key to stay around until next time */ |
bbce6d69 |
1082 | HeSVKEY_set(entry, SvREFCNT_inc(key)); |
1083 | return entry; /* beware, hent_val is not set */ |
463ee0b2 |
1084 | } |
fde52b5c |
1085 | if (HeVAL(entry)) |
1086 | SvREFCNT_dec(HeVAL(entry)); |
ff68c719 |
1087 | Safefree(HeKEY_hek(entry)); |
4633a7c4 |
1088 | del_he(entry); |
463ee0b2 |
1089 | xhv->xhv_eiter = Null(HE*); |
1090 | return Null(HE*); |
79072805 |
1091 | } |
f675dbe5 |
1092 | #ifdef DYNAMIC_ENV_FETCH /* set up %ENV for iteration */ |
1093 | if (!entry && HvNAME(hv) && strEQ(HvNAME(hv), ENV_HV_NAME)) |
1094 | prime_env_iter(); |
1095 | #endif |
463ee0b2 |
1096 | |
79072805 |
1097 | if (!xhv->xhv_array) |
d18c6117 |
1098 | Newz(506, xhv->xhv_array, |
1099 | PERL_HV_ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char); |
fde52b5c |
1100 | if (entry) |
1101 | entry = HeNEXT(entry); |
1102 | while (!entry) { |
1103 | ++xhv->xhv_riter; |
1104 | if (xhv->xhv_riter > xhv->xhv_max) { |
1105 | xhv->xhv_riter = -1; |
1106 | break; |
79072805 |
1107 | } |
fde52b5c |
1108 | entry = ((HE**)xhv->xhv_array)[xhv->xhv_riter]; |
1109 | } |
79072805 |
1110 | |
72940dca |
1111 | if (oldentry && HvLAZYDEL(hv)) { /* was deleted earlier? */ |
1112 | HvLAZYDEL_off(hv); |
68dc0745 |
1113 | hv_free_ent(hv, oldentry); |
72940dca |
1114 | } |
a0d0e21e |
1115 | |
79072805 |
1116 | xhv->xhv_eiter = entry; |
1117 | return entry; |
1118 | } |
1119 | |
1120 | char * |
864dbfa3 |
1121 | Perl_hv_iterkey(pTHX_ register HE *entry, I32 *retlen) |
79072805 |
1122 | { |
fde52b5c |
1123 | if (HeKLEN(entry) == HEf_SVKEY) { |
fb73857a |
1124 | STRLEN len; |
1125 | char *p = SvPV(HeKEY_sv(entry), len); |
1126 | *retlen = len; |
1127 | return p; |
fde52b5c |
1128 | } |
1129 | else { |
1130 | *retlen = HeKLEN(entry); |
1131 | return HeKEY(entry); |
1132 | } |
1133 | } |
1134 | |
1135 | /* unlike hv_iterval(), this always returns a mortal copy of the key */ |
1136 | SV * |
864dbfa3 |
1137 | Perl_hv_iterkeysv(pTHX_ register HE *entry) |
fde52b5c |
1138 | { |
1139 | if (HeKLEN(entry) == HEf_SVKEY) |
bbce6d69 |
1140 | return sv_mortalcopy(HeKEY_sv(entry)); |
fde52b5c |
1141 | else |
79cb57f6 |
1142 | return sv_2mortal(newSVpvn((HeKLEN(entry) ? HeKEY(entry) : ""), |
fde52b5c |
1143 | HeKLEN(entry))); |
79072805 |
1144 | } |
1145 | |
1146 | SV * |
864dbfa3 |
1147 | Perl_hv_iterval(pTHX_ HV *hv, register HE *entry) |
79072805 |
1148 | { |
8990e307 |
1149 | if (SvRMAGICAL(hv)) { |
463ee0b2 |
1150 | if (mg_find((SV*)hv,'P')) { |
8990e307 |
1151 | SV* sv = sv_newmortal(); |
bbce6d69 |
1152 | if (HeKLEN(entry) == HEf_SVKEY) |
1153 | mg_copy((SV*)hv, sv, (char*)HeKEY_sv(entry), HEf_SVKEY); |
1154 | else mg_copy((SV*)hv, sv, HeKEY(entry), HeKLEN(entry)); |
463ee0b2 |
1155 | return sv; |
1156 | } |
79072805 |
1157 | } |
fde52b5c |
1158 | return HeVAL(entry); |
79072805 |
1159 | } |
1160 | |
a0d0e21e |
1161 | SV * |
864dbfa3 |
1162 | Perl_hv_iternextsv(pTHX_ HV *hv, char **key, I32 *retlen) |
a0d0e21e |
1163 | { |
1164 | HE *he; |
1165 | if ( (he = hv_iternext(hv)) == NULL) |
1166 | return NULL; |
1167 | *key = hv_iterkey(he, retlen); |
1168 | return hv_iterval(hv, he); |
1169 | } |
1170 | |
79072805 |
1171 | void |
864dbfa3 |
1172 | Perl_hv_magic(pTHX_ HV *hv, GV *gv, int how) |
79072805 |
1173 | { |
a0d0e21e |
1174 | sv_magic((SV*)hv, (SV*)gv, how, Nullch, 0); |
79072805 |
1175 | } |
fde52b5c |
1176 | |
bbce6d69 |
1177 | char* |
864dbfa3 |
1178 | Perl_sharepvn(pTHX_ const char *sv, I32 len, U32 hash) |
bbce6d69 |
1179 | { |
ff68c719 |
1180 | return HEK_KEY(share_hek(sv, len, hash)); |
bbce6d69 |
1181 | } |
1182 | |
1183 | /* possibly free a shared string if no one has access to it |
fde52b5c |
1184 | * len and hash must both be valid for str. |
1185 | */ |
bbce6d69 |
1186 | void |
864dbfa3 |
1187 | Perl_unsharepvn(pTHX_ const char *str, I32 len, U32 hash) |
fde52b5c |
1188 | { |
1189 | register XPVHV* xhv; |
1190 | register HE *entry; |
1191 | register HE **oentry; |
1192 | register I32 i = 1; |
1193 | I32 found = 0; |
bbce6d69 |
1194 | |
fde52b5c |
1195 | /* what follows is the moral equivalent of: |
6b88bc9c |
1196 | if ((Svp = hv_fetch(PL_strtab, tmpsv, FALSE, hash))) { |
bbce6d69 |
1197 | if (--*Svp == Nullsv) |
6b88bc9c |
1198 | hv_delete(PL_strtab, str, len, G_DISCARD, hash); |
bbce6d69 |
1199 | } */ |
3280af22 |
1200 | xhv = (XPVHV*)SvANY(PL_strtab); |
fde52b5c |
1201 | /* assert(xhv_array != 0) */ |
5f08fbcd |
1202 | LOCK_STRTAB_MUTEX; |
fde52b5c |
1203 | oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; |
bbce6d69 |
1204 | for (entry = *oentry; entry; i=0, oentry = &HeNEXT(entry), entry = *oentry) { |
fde52b5c |
1205 | if (HeHASH(entry) != hash) /* strings can't be equal */ |
1206 | continue; |
1207 | if (HeKLEN(entry) != len) |
1208 | continue; |
36477c24 |
1209 | if (memNE(HeKEY(entry),str,len)) /* is this it? */ |
fde52b5c |
1210 | continue; |
1211 | found = 1; |
bbce6d69 |
1212 | if (--HeVAL(entry) == Nullsv) { |
1213 | *oentry = HeNEXT(entry); |
1214 | if (i && !*oentry) |
1215 | xhv->xhv_fill--; |
ff68c719 |
1216 | Safefree(HeKEY_hek(entry)); |
bbce6d69 |
1217 | del_he(entry); |
1218 | --xhv->xhv_keys; |
fde52b5c |
1219 | } |
bbce6d69 |
1220 | break; |
fde52b5c |
1221 | } |
333f433b |
1222 | UNLOCK_STRTAB_MUTEX; |
bbce6d69 |
1223 | |
0453d815 |
1224 | { |
1225 | dTHR; |
1226 | if (!found && ckWARN_d(WARN_INTERNAL)) |
1227 | Perl_warner(aTHX_ WARN_INTERNAL, "Attempt to free non-existent shared string"); |
1228 | } |
fde52b5c |
1229 | } |
1230 | |
bbce6d69 |
1231 | /* get a (constant) string ptr from the global string table |
1232 | * string will get added if it is not already there. |
fde52b5c |
1233 | * len and hash must both be valid for str. |
1234 | */ |
bbce6d69 |
1235 | HEK * |
864dbfa3 |
1236 | Perl_share_hek(pTHX_ const char *str, I32 len, register U32 hash) |
fde52b5c |
1237 | { |
1238 | register XPVHV* xhv; |
1239 | register HE *entry; |
1240 | register HE **oentry; |
1241 | register I32 i = 1; |
1242 | I32 found = 0; |
bbce6d69 |
1243 | |
fde52b5c |
1244 | /* what follows is the moral equivalent of: |
bbce6d69 |
1245 | |
6b88bc9c |
1246 | if (!(Svp = hv_fetch(PL_strtab, str, len, FALSE))) |
1247 | hv_store(PL_strtab, str, len, Nullsv, hash); |
bbce6d69 |
1248 | */ |
3280af22 |
1249 | xhv = (XPVHV*)SvANY(PL_strtab); |
fde52b5c |
1250 | /* assert(xhv_array != 0) */ |
5f08fbcd |
1251 | LOCK_STRTAB_MUTEX; |
fde52b5c |
1252 | oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; |
bbce6d69 |
1253 | for (entry = *oentry; entry; i=0, entry = HeNEXT(entry)) { |
fde52b5c |
1254 | if (HeHASH(entry) != hash) /* strings can't be equal */ |
1255 | continue; |
1256 | if (HeKLEN(entry) != len) |
1257 | continue; |
36477c24 |
1258 | if (memNE(HeKEY(entry),str,len)) /* is this it? */ |
fde52b5c |
1259 | continue; |
1260 | found = 1; |
fde52b5c |
1261 | break; |
1262 | } |
bbce6d69 |
1263 | if (!found) { |
1264 | entry = new_he(); |
ff68c719 |
1265 | HeKEY_hek(entry) = save_hek(str, len, hash); |
bbce6d69 |
1266 | HeVAL(entry) = Nullsv; |
1267 | HeNEXT(entry) = *oentry; |
1268 | *oentry = entry; |
1269 | xhv->xhv_keys++; |
1270 | if (i) { /* initial entry? */ |
1271 | ++xhv->xhv_fill; |
1272 | if (xhv->xhv_keys > xhv->xhv_max) |
3280af22 |
1273 | hsplit(PL_strtab); |
bbce6d69 |
1274 | } |
1275 | } |
1276 | |
1277 | ++HeVAL(entry); /* use value slot as REFCNT */ |
5f08fbcd |
1278 | UNLOCK_STRTAB_MUTEX; |
ff68c719 |
1279 | return HeKEY_hek(entry); |
fde52b5c |
1280 | } |
1281 | |
bbce6d69 |
1282 | |
61c8b479 |
1283 | |