Commit | Line | Data |
a0d0e21e |
1 | /* av.c |
79072805 |
2 | * |
4bb101f2 |
3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
1d325971 |
4 | * 2000, 2001, 2002, 2003, 2004, 2005 by Larry Wall and others |
79072805 |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public |
7 | * License or the Artistic License, as specified in the README file. |
8 | * |
a0d0e21e |
9 | */ |
10 | |
11 | /* |
12 | * "...for the Entwives desired order, and plenty, and peace (by which they |
13 | * meant that things should remain where they had set them)." --Treebeard |
79072805 |
14 | */ |
15 | |
ccfc67b7 |
16 | /* |
17 | =head1 Array Manipulation Functions |
18 | */ |
19 | |
79072805 |
20 | #include "EXTERN.h" |
864dbfa3 |
21 | #define PERL_IN_AV_C |
79072805 |
22 | #include "perl.h" |
23 | |
fb73857a |
24 | void |
864dbfa3 |
25 | Perl_av_reify(pTHX_ AV *av) |
a0d0e21e |
26 | { |
27 | I32 key; |
fb73857a |
28 | |
ba5d1d60 |
29 | assert(av); |
30 | |
3c78fafa |
31 | if (AvREAL(av)) |
32 | return; |
93965878 |
33 | #ifdef DEBUGGING |
14befaf4 |
34 | if (SvTIED_mg((SV*)av, PERL_MAGIC_tied) && ckWARN_d(WARN_DEBUGGING)) |
9014280d |
35 | Perl_warner(aTHX_ packWARN(WARN_DEBUGGING), "av_reify called on tied array"); |
93965878 |
36 | #endif |
a0d0e21e |
37 | key = AvMAX(av) + 1; |
93965878 |
38 | while (key > AvFILLp(av) + 1) |
3280af22 |
39 | AvARRAY(av)[--key] = &PL_sv_undef; |
a0d0e21e |
40 | while (key) { |
4373e329 |
41 | SV * const sv = AvARRAY(av)[--key]; |
a0d0e21e |
42 | assert(sv); |
411caa50 |
43 | if (sv != &PL_sv_undef) |
a0d0e21e |
44 | (void)SvREFCNT_inc(sv); |
45 | } |
29de640a |
46 | key = AvARRAY(av) - AvALLOC(av); |
47 | while (key) |
3280af22 |
48 | AvALLOC(av)[--key] = &PL_sv_undef; |
62b1ebc2 |
49 | AvREIFY_off(av); |
a0d0e21e |
50 | AvREAL_on(av); |
51 | } |
52 | |
cb50131a |
53 | /* |
54 | =for apidoc av_extend |
55 | |
56 | Pre-extend an array. The C<key> is the index to which the array should be |
57 | extended. |
58 | |
59 | =cut |
60 | */ |
61 | |
a0d0e21e |
62 | void |
864dbfa3 |
63 | Perl_av_extend(pTHX_ AV *av, I32 key) |
a0d0e21e |
64 | { |
7a5b473e |
65 | MAGIC *mg; |
66 | |
ba5d1d60 |
67 | assert(av); |
68 | |
7a5b473e |
69 | mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied); |
823a54a3 |
70 | if (mg) { |
93965878 |
71 | dSP; |
72 | ENTER; |
73 | SAVETMPS; |
e788e7d3 |
74 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 |
75 | PUSHMARK(SP); |
76 | EXTEND(SP,2); |
33c27489 |
77 | PUSHs(SvTIED_obj((SV*)av, mg)); |
a60c0954 |
78 | PUSHs(sv_2mortal(newSViv(key+1))); |
93965878 |
79 | PUTBACK; |
864dbfa3 |
80 | call_method("EXTEND", G_SCALAR|G_DISCARD); |
d3acc0f7 |
81 | POPSTACK; |
93965878 |
82 | FREETMPS; |
83 | LEAVE; |
84 | return; |
85 | } |
a0d0e21e |
86 | if (key > AvMAX(av)) { |
87 | SV** ary; |
88 | I32 tmp; |
89 | I32 newmax; |
90 | |
91 | if (AvALLOC(av) != AvARRAY(av)) { |
93965878 |
92 | ary = AvALLOC(av) + AvFILLp(av) + 1; |
a0d0e21e |
93 | tmp = AvARRAY(av) - AvALLOC(av); |
93965878 |
94 | Move(AvARRAY(av), AvALLOC(av), AvFILLp(av)+1, SV*); |
a0d0e21e |
95 | AvMAX(av) += tmp; |
f880fe2f |
96 | SvPV_set(av, (char*)AvALLOC(av)); |
a0d0e21e |
97 | if (AvREAL(av)) { |
98 | while (tmp) |
3280af22 |
99 | ary[--tmp] = &PL_sv_undef; |
a0d0e21e |
100 | } |
a0d0e21e |
101 | if (key > AvMAX(av) - 10) { |
102 | newmax = key + AvMAX(av); |
103 | goto resize; |
104 | } |
105 | } |
106 | else { |
2b573ace |
107 | #ifdef PERL_MALLOC_WRAP |
108 | static const char oom_array_extend[] = |
109 | "Out of memory during array extend"; /* Duplicated in pp_hot.c */ |
110 | #endif |
111 | |
a0d0e21e |
112 | if (AvALLOC(av)) { |
516a5887 |
113 | #if !defined(STRANGE_MALLOC) && !defined(MYMALLOC) |
c1f7b11a |
114 | MEM_SIZE bytes; |
115 | IV itmp; |
c07a80fd |
116 | #endif |
4633a7c4 |
117 | |
7bab3ede |
118 | #ifdef MYMALLOC |
8d6dde3e |
119 | newmax = malloced_size((void*)AvALLOC(av))/sizeof(SV*) - 1; |
120 | |
121 | if (key <= newmax) |
122 | goto resized; |
123 | #endif |
a0d0e21e |
124 | newmax = key + AvMAX(av) / 5; |
125 | resize: |
2b573ace |
126 | MEM_WRAP_CHECK_1(newmax+1, SV*, oom_array_extend); |
8d6dde3e |
127 | #if defined(STRANGE_MALLOC) || defined(MYMALLOC) |
a0d0e21e |
128 | Renew(AvALLOC(av),newmax+1, SV*); |
4633a7c4 |
129 | #else |
130 | bytes = (newmax + 1) * sizeof(SV*); |
131 | #define MALLOC_OVERHEAD 16 |
c1f7b11a |
132 | itmp = MALLOC_OVERHEAD; |
eb160463 |
133 | while ((MEM_SIZE)(itmp - MALLOC_OVERHEAD) < bytes) |
c1f7b11a |
134 | itmp += itmp; |
135 | itmp -= MALLOC_OVERHEAD; |
136 | itmp /= sizeof(SV*); |
137 | assert(itmp > newmax); |
138 | newmax = itmp - 1; |
139 | assert(newmax >= AvMAX(av)); |
a02a5408 |
140 | Newx(ary, newmax+1, SV*); |
4633a7c4 |
141 | Copy(AvALLOC(av), ary, AvMAX(av)+1, SV*); |
fba3b22e |
142 | if (AvMAX(av) > 64) |
143 | offer_nice_chunk(AvALLOC(av), (AvMAX(av)+1) * sizeof(SV*)); |
4633a7c4 |
144 | else |
145 | Safefree(AvALLOC(av)); |
146 | AvALLOC(av) = ary; |
147 | #endif |
7bab3ede |
148 | #ifdef MYMALLOC |
8d6dde3e |
149 | resized: |
9c5ffd7c |
150 | #endif |
a0d0e21e |
151 | ary = AvALLOC(av) + AvMAX(av) + 1; |
152 | tmp = newmax - AvMAX(av); |
3280af22 |
153 | if (av == PL_curstack) { /* Oops, grew stack (via av_store()?) */ |
154 | PL_stack_sp = AvALLOC(av) + (PL_stack_sp - PL_stack_base); |
155 | PL_stack_base = AvALLOC(av); |
156 | PL_stack_max = PL_stack_base + newmax; |
a0d0e21e |
157 | } |
158 | } |
159 | else { |
8d6dde3e |
160 | newmax = key < 3 ? 3 : key; |
2b573ace |
161 | MEM_WRAP_CHECK_1(newmax+1, SV*, oom_array_extend); |
a02a5408 |
162 | Newx(AvALLOC(av), newmax+1, SV*); |
a0d0e21e |
163 | ary = AvALLOC(av) + 1; |
164 | tmp = newmax; |
3280af22 |
165 | AvALLOC(av)[0] = &PL_sv_undef; /* For the stacks */ |
a0d0e21e |
166 | } |
167 | if (AvREAL(av)) { |
168 | while (tmp) |
3280af22 |
169 | ary[--tmp] = &PL_sv_undef; |
a0d0e21e |
170 | } |
171 | |
f880fe2f |
172 | SvPV_set(av, (char*)AvALLOC(av)); |
a0d0e21e |
173 | AvMAX(av) = newmax; |
174 | } |
175 | } |
176 | } |
177 | |
cb50131a |
178 | /* |
179 | =for apidoc av_fetch |
180 | |
181 | Returns the SV at the specified index in the array. The C<key> is the |
182 | index. If C<lval> is set then the fetch will be part of a store. Check |
183 | that the return value is non-null before dereferencing it to a C<SV*>. |
184 | |
185 | See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for |
186 | more information on how to use this function on tied arrays. |
187 | |
188 | =cut |
189 | */ |
190 | |
79072805 |
191 | SV** |
864dbfa3 |
192 | Perl_av_fetch(pTHX_ register AV *av, I32 key, I32 lval) |
79072805 |
193 | { |
194 | SV *sv; |
195 | |
ba5d1d60 |
196 | assert(av); |
a0d0e21e |
197 | |
6f12eb6d |
198 | if (SvRMAGICAL(av)) { |
35a4481c |
199 | const MAGIC * const tied_magic = mg_find((SV*)av, PERL_MAGIC_tied); |
6f12eb6d |
200 | if (tied_magic || mg_find((SV*)av, PERL_MAGIC_regdata)) { |
201 | U32 adjust_index = 1; |
202 | |
203 | if (tied_magic && key < 0) { |
204 | /* Handle negative array indices 20020222 MJD */ |
823a54a3 |
205 | SV * const * const negative_indices_glob = |
6f12eb6d |
206 | hv_fetch(SvSTASH(SvRV(SvTIED_obj((SV *)av, |
207 | tied_magic))), |
208 | NEGATIVE_INDICES_VAR, 16, 0); |
209 | |
210 | if (negative_indices_glob |
211 | && SvTRUE(GvSV(*negative_indices_glob))) |
212 | adjust_index = 0; |
213 | } |
214 | |
215 | if (key < 0 && adjust_index) { |
216 | key += AvFILL(av) + 1; |
217 | if (key < 0) |
218 | return 0; |
219 | } |
220 | |
221 | sv = sv_newmortal(); |
dd28f7bb |
222 | sv_upgrade(sv, SVt_PVLV); |
223 | mg_copy((SV*)av, sv, 0, key); |
224 | LvTYPE(sv) = 't'; |
225 | LvTARG(sv) = sv; /* fake (SV**) */ |
226 | return &(LvTARG(sv)); |
6f12eb6d |
227 | } |
228 | } |
229 | |
93965878 |
230 | if (key < 0) { |
231 | key += AvFILL(av) + 1; |
232 | if (key < 0) |
233 | return 0; |
234 | } |
235 | |
93965878 |
236 | if (key > AvFILLp(av)) { |
a0d0e21e |
237 | if (!lval) |
238 | return 0; |
352edd90 |
239 | sv = NEWSV(5,0); |
a0d0e21e |
240 | return av_store(av,key,sv); |
79072805 |
241 | } |
3280af22 |
242 | if (AvARRAY(av)[key] == &PL_sv_undef) { |
4dbf4341 |
243 | emptyness: |
79072805 |
244 | if (lval) { |
245 | sv = NEWSV(6,0); |
463ee0b2 |
246 | return av_store(av,key,sv); |
79072805 |
247 | } |
248 | return 0; |
249 | } |
4dbf4341 |
250 | else if (AvREIFY(av) |
251 | && (!AvARRAY(av)[key] /* eg. @_ could have freed elts */ |
0565a181 |
252 | || SvIS_FREED(AvARRAY(av)[key]))) { |
3280af22 |
253 | AvARRAY(av)[key] = &PL_sv_undef; /* 1/2 reify */ |
4dbf4341 |
254 | goto emptyness; |
255 | } |
463ee0b2 |
256 | return &AvARRAY(av)[key]; |
79072805 |
257 | } |
258 | |
cb50131a |
259 | /* |
260 | =for apidoc av_store |
261 | |
262 | Stores an SV in an array. The array index is specified as C<key>. The |
263 | return value will be NULL if the operation failed or if the value did not |
264 | need to be actually stored within the array (as in the case of tied |
265 | arrays). Otherwise it can be dereferenced to get the original C<SV*>. Note |
266 | that the caller is responsible for suitably incrementing the reference |
267 | count of C<val> before the call, and decrementing it if the function |
268 | returned NULL. |
269 | |
270 | See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for |
271 | more information on how to use this function on tied arrays. |
272 | |
273 | =cut |
274 | */ |
275 | |
79072805 |
276 | SV** |
864dbfa3 |
277 | Perl_av_store(pTHX_ register AV *av, I32 key, SV *val) |
79072805 |
278 | { |
79072805 |
279 | SV** ary; |
280 | |
ba5d1d60 |
281 | assert(av); |
282 | |
43fcc5d2 |
283 | if (!val) |
3280af22 |
284 | val = &PL_sv_undef; |
463ee0b2 |
285 | |
6f12eb6d |
286 | if (SvRMAGICAL(av)) { |
35a4481c |
287 | const MAGIC * const tied_magic = mg_find((SV*)av, PERL_MAGIC_tied); |
6f12eb6d |
288 | if (tied_magic) { |
289 | /* Handle negative array indices 20020222 MJD */ |
290 | if (key < 0) { |
291 | unsigned adjust_index = 1; |
823a54a3 |
292 | SV * const * const negative_indices_glob = |
6f12eb6d |
293 | hv_fetch(SvSTASH(SvRV(SvTIED_obj((SV *)av, |
294 | tied_magic))), |
295 | NEGATIVE_INDICES_VAR, 16, 0); |
296 | if (negative_indices_glob |
297 | && SvTRUE(GvSV(*negative_indices_glob))) |
298 | adjust_index = 0; |
299 | if (adjust_index) { |
300 | key += AvFILL(av) + 1; |
301 | if (key < 0) |
302 | return 0; |
303 | } |
304 | } |
305 | if (val != &PL_sv_undef) { |
306 | mg_copy((SV*)av, val, 0, key); |
307 | } |
308 | return 0; |
309 | } |
310 | } |
311 | |
312 | |
a0d0e21e |
313 | if (key < 0) { |
314 | key += AvFILL(av) + 1; |
315 | if (key < 0) |
316 | return 0; |
79072805 |
317 | } |
93965878 |
318 | |
43fcc5d2 |
319 | if (SvREADONLY(av) && key >= AvFILL(av)) |
cea2e8a9 |
320 | Perl_croak(aTHX_ PL_no_modify); |
93965878 |
321 | |
49beac48 |
322 | if (!AvREAL(av) && AvREIFY(av)) |
a0d0e21e |
323 | av_reify(av); |
a0d0e21e |
324 | if (key > AvMAX(av)) |
325 | av_extend(av,key); |
463ee0b2 |
326 | ary = AvARRAY(av); |
93965878 |
327 | if (AvFILLp(av) < key) { |
a0d0e21e |
328 | if (!AvREAL(av)) { |
3280af22 |
329 | if (av == PL_curstack && key > PL_stack_sp - PL_stack_base) |
330 | PL_stack_sp = PL_stack_base + key; /* XPUSH in disguise */ |
a0d0e21e |
331 | do |
3280af22 |
332 | ary[++AvFILLp(av)] = &PL_sv_undef; |
93965878 |
333 | while (AvFILLp(av) < key); |
79072805 |
334 | } |
93965878 |
335 | AvFILLp(av) = key; |
79072805 |
336 | } |
a0d0e21e |
337 | else if (AvREAL(av)) |
338 | SvREFCNT_dec(ary[key]); |
79072805 |
339 | ary[key] = val; |
8990e307 |
340 | if (SvSMAGICAL(av)) { |
3280af22 |
341 | if (val != &PL_sv_undef) { |
fabdb6c0 |
342 | const MAGIC* const mg = SvMAGIC(av); |
a0d0e21e |
343 | sv_magic(val, (SV*)av, toLOWER(mg->mg_type), 0, key); |
344 | } |
463ee0b2 |
345 | mg_set((SV*)av); |
346 | } |
79072805 |
347 | return &ary[key]; |
348 | } |
349 | |
cb50131a |
350 | /* |
351 | =for apidoc newAV |
352 | |
353 | Creates a new AV. The reference count is set to 1. |
354 | |
355 | =cut |
356 | */ |
357 | |
79072805 |
358 | AV * |
864dbfa3 |
359 | Perl_newAV(pTHX) |
79072805 |
360 | { |
823a54a3 |
361 | register AV * const av = (AV*)NEWSV(3,0); |
79072805 |
362 | |
a0d0e21e |
363 | sv_upgrade((SV *)av, SVt_PVAV); |
a7f5e44d |
364 | /* sv_upgrade does AvREAL_only() */ |
463ee0b2 |
365 | AvALLOC(av) = 0; |
f880fe2f |
366 | SvPV_set(av, (char*)0); |
93965878 |
367 | AvMAX(av) = AvFILLp(av) = -1; |
463ee0b2 |
368 | return av; |
79072805 |
369 | } |
370 | |
cb50131a |
371 | /* |
372 | =for apidoc av_make |
373 | |
374 | Creates a new AV and populates it with a list of SVs. The SVs are copied |
375 | into the array, so they may be freed after the call to av_make. The new AV |
376 | will have a reference count of 1. |
377 | |
378 | =cut |
379 | */ |
380 | |
79072805 |
381 | AV * |
864dbfa3 |
382 | Perl_av_make(pTHX_ register I32 size, register SV **strp) |
79072805 |
383 | { |
823a54a3 |
384 | register AV * const av = (AV*)NEWSV(8,0); |
79072805 |
385 | |
a0d0e21e |
386 | sv_upgrade((SV *) av,SVt_PVAV); |
a7f5e44d |
387 | /* sv_upgrade does AvREAL_only() */ |
a0288114 |
388 | if (size) { /* "defined" was returning undef for size==0 anyway. */ |
dd374669 |
389 | register SV** ary; |
390 | register I32 i; |
a02a5408 |
391 | Newx(ary,size,SV*); |
573fa4ea |
392 | AvALLOC(av) = ary; |
f880fe2f |
393 | SvPV_set(av, (char*)ary); |
93965878 |
394 | AvFILLp(av) = size - 1; |
573fa4ea |
395 | AvMAX(av) = size - 1; |
396 | for (i = 0; i < size; i++) { |
397 | assert (*strp); |
398 | ary[i] = NEWSV(7,0); |
399 | sv_setsv(ary[i], *strp); |
400 | strp++; |
401 | } |
79072805 |
402 | } |
463ee0b2 |
403 | return av; |
79072805 |
404 | } |
405 | |
cb50131a |
406 | /* |
407 | =for apidoc av_clear |
408 | |
409 | Clears an array, making it empty. Does not free the memory used by the |
410 | array itself. |
411 | |
412 | =cut |
413 | */ |
414 | |
79072805 |
415 | void |
864dbfa3 |
416 | Perl_av_clear(pTHX_ register AV *av) |
79072805 |
417 | { |
418 | register I32 key; |
419 | |
ba5d1d60 |
420 | assert(av); |
7d55f622 |
421 | #ifdef DEBUGGING |
32da55ab |
422 | if (SvREFCNT(av) == 0 && ckWARN_d(WARN_DEBUGGING)) { |
9014280d |
423 | Perl_warner(aTHX_ packWARN(WARN_DEBUGGING), "Attempt to clear deleted array"); |
7d55f622 |
424 | } |
425 | #endif |
a0d0e21e |
426 | |
39caa665 |
427 | if (SvREADONLY(av)) |
cea2e8a9 |
428 | Perl_croak(aTHX_ PL_no_modify); |
39caa665 |
429 | |
93965878 |
430 | /* Give any tie a chance to cleanup first */ |
431 | if (SvRMAGICAL(av)) |
432 | mg_clear((SV*)av); |
433 | |
a60c0954 |
434 | if (AvMAX(av) < 0) |
435 | return; |
436 | |
a0d0e21e |
437 | if (AvREAL(av)) { |
823a54a3 |
438 | SV** const ary = AvARRAY(av); |
93965878 |
439 | key = AvFILLp(av) + 1; |
a0d0e21e |
440 | while (key) { |
823a54a3 |
441 | SV * const sv = ary[--key]; |
6b42d12b |
442 | /* undef the slot before freeing the value, because a |
443 | * destructor might try to modify this arrray */ |
3280af22 |
444 | ary[key] = &PL_sv_undef; |
6b42d12b |
445 | SvREFCNT_dec(sv); |
a0d0e21e |
446 | } |
447 | } |
155aba94 |
448 | if ((key = AvARRAY(av) - AvALLOC(av))) { |
463ee0b2 |
449 | AvMAX(av) += key; |
f880fe2f |
450 | SvPV_set(av, (char*)AvALLOC(av)); |
79072805 |
451 | } |
93965878 |
452 | AvFILLp(av) = -1; |
fb73857a |
453 | |
79072805 |
454 | } |
455 | |
cb50131a |
456 | /* |
457 | =for apidoc av_undef |
458 | |
459 | Undefines the array. Frees the memory used by the array itself. |
460 | |
461 | =cut |
462 | */ |
463 | |
79072805 |
464 | void |
864dbfa3 |
465 | Perl_av_undef(pTHX_ register AV *av) |
79072805 |
466 | { |
ba5d1d60 |
467 | assert(av); |
93965878 |
468 | |
469 | /* Give any tie a chance to cleanup first */ |
14befaf4 |
470 | if (SvTIED_mg((SV*)av, PERL_MAGIC_tied)) |
93965878 |
471 | av_fill(av, -1); /* mg_clear() ? */ |
472 | |
a0d0e21e |
473 | if (AvREAL(av)) { |
a3b680e6 |
474 | register I32 key = AvFILLp(av) + 1; |
a0d0e21e |
475 | while (key) |
476 | SvREFCNT_dec(AvARRAY(av)[--key]); |
477 | } |
463ee0b2 |
478 | Safefree(AvALLOC(av)); |
479 | AvALLOC(av) = 0; |
f880fe2f |
480 | SvPV_set(av, (char*)0); |
93965878 |
481 | AvMAX(av) = AvFILLp(av) = -1; |
79072805 |
482 | } |
483 | |
cb50131a |
484 | /* |
485 | =for apidoc av_push |
486 | |
487 | Pushes an SV onto the end of the array. The array will grow automatically |
488 | to accommodate the addition. |
489 | |
490 | =cut |
491 | */ |
492 | |
a0d0e21e |
493 | void |
864dbfa3 |
494 | Perl_av_push(pTHX_ register AV *av, SV *val) |
93965878 |
495 | { |
27da23d5 |
496 | dVAR; |
93965878 |
497 | MAGIC *mg; |
ba5d1d60 |
498 | assert(av); |
499 | |
93965878 |
500 | if (SvREADONLY(av)) |
cea2e8a9 |
501 | Perl_croak(aTHX_ PL_no_modify); |
93965878 |
502 | |
14befaf4 |
503 | if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) { |
93965878 |
504 | dSP; |
e788e7d3 |
505 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 |
506 | PUSHMARK(SP); |
507 | EXTEND(SP,2); |
33c27489 |
508 | PUSHs(SvTIED_obj((SV*)av, mg)); |
93965878 |
509 | PUSHs(val); |
a60c0954 |
510 | PUTBACK; |
511 | ENTER; |
864dbfa3 |
512 | call_method("PUSH", G_SCALAR|G_DISCARD); |
a60c0954 |
513 | LEAVE; |
d3acc0f7 |
514 | POPSTACK; |
93965878 |
515 | return; |
516 | } |
517 | av_store(av,AvFILLp(av)+1,val); |
79072805 |
518 | } |
519 | |
cb50131a |
520 | /* |
521 | =for apidoc av_pop |
522 | |
523 | Pops an SV off the end of the array. Returns C<&PL_sv_undef> if the array |
524 | is empty. |
525 | |
526 | =cut |
527 | */ |
528 | |
79072805 |
529 | SV * |
864dbfa3 |
530 | Perl_av_pop(pTHX_ register AV *av) |
79072805 |
531 | { |
27da23d5 |
532 | dVAR; |
79072805 |
533 | SV *retval; |
93965878 |
534 | MAGIC* mg; |
79072805 |
535 | |
ba5d1d60 |
536 | assert(av); |
537 | |
43fcc5d2 |
538 | if (SvREADONLY(av)) |
cea2e8a9 |
539 | Perl_croak(aTHX_ PL_no_modify); |
14befaf4 |
540 | if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) { |
93965878 |
541 | dSP; |
e788e7d3 |
542 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 |
543 | PUSHMARK(SP); |
33c27489 |
544 | XPUSHs(SvTIED_obj((SV*)av, mg)); |
a60c0954 |
545 | PUTBACK; |
546 | ENTER; |
864dbfa3 |
547 | if (call_method("POP", G_SCALAR)) { |
3280af22 |
548 | retval = newSVsv(*PL_stack_sp--); |
93965878 |
549 | } else { |
3280af22 |
550 | retval = &PL_sv_undef; |
93965878 |
551 | } |
a60c0954 |
552 | LEAVE; |
d3acc0f7 |
553 | POPSTACK; |
93965878 |
554 | return retval; |
555 | } |
d19c0e07 |
556 | if (AvFILL(av) < 0) |
557 | return &PL_sv_undef; |
93965878 |
558 | retval = AvARRAY(av)[AvFILLp(av)]; |
3280af22 |
559 | AvARRAY(av)[AvFILLp(av)--] = &PL_sv_undef; |
8990e307 |
560 | if (SvSMAGICAL(av)) |
463ee0b2 |
561 | mg_set((SV*)av); |
79072805 |
562 | return retval; |
563 | } |
564 | |
cb50131a |
565 | /* |
566 | =for apidoc av_unshift |
567 | |
568 | Unshift the given number of C<undef> values onto the beginning of the |
569 | array. The array will grow automatically to accommodate the addition. You |
570 | must then use C<av_store> to assign values to these new elements. |
571 | |
572 | =cut |
573 | */ |
574 | |
79072805 |
575 | void |
864dbfa3 |
576 | Perl_av_unshift(pTHX_ register AV *av, register I32 num) |
79072805 |
577 | { |
27da23d5 |
578 | dVAR; |
79072805 |
579 | register I32 i; |
93965878 |
580 | MAGIC* mg; |
79072805 |
581 | |
ba5d1d60 |
582 | assert(av); |
583 | |
43fcc5d2 |
584 | if (SvREADONLY(av)) |
cea2e8a9 |
585 | Perl_croak(aTHX_ PL_no_modify); |
93965878 |
586 | |
14befaf4 |
587 | if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) { |
93965878 |
588 | dSP; |
e788e7d3 |
589 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 |
590 | PUSHMARK(SP); |
591 | EXTEND(SP,1+num); |
33c27489 |
592 | PUSHs(SvTIED_obj((SV*)av, mg)); |
93965878 |
593 | while (num-- > 0) { |
3280af22 |
594 | PUSHs(&PL_sv_undef); |
93965878 |
595 | } |
596 | PUTBACK; |
a60c0954 |
597 | ENTER; |
864dbfa3 |
598 | call_method("UNSHIFT", G_SCALAR|G_DISCARD); |
a60c0954 |
599 | LEAVE; |
d3acc0f7 |
600 | POPSTACK; |
93965878 |
601 | return; |
602 | } |
603 | |
d19c0e07 |
604 | if (num <= 0) |
605 | return; |
49beac48 |
606 | if (!AvREAL(av) && AvREIFY(av)) |
607 | av_reify(av); |
a0d0e21e |
608 | i = AvARRAY(av) - AvALLOC(av); |
609 | if (i) { |
610 | if (i > num) |
611 | i = num; |
612 | num -= i; |
613 | |
614 | AvMAX(av) += i; |
93965878 |
615 | AvFILLp(av) += i; |
f880fe2f |
616 | SvPV_set(av, (char*)(AvARRAY(av) - i)); |
a0d0e21e |
617 | } |
d2719217 |
618 | if (num) { |
a3b680e6 |
619 | register SV **ary; |
620 | I32 slide; |
67a38de0 |
621 | i = AvFILLp(av); |
e2b534e7 |
622 | /* Create extra elements */ |
623 | slide = i > 0 ? i : 0; |
624 | num += slide; |
67a38de0 |
625 | av_extend(av, i + num); |
93965878 |
626 | AvFILLp(av) += num; |
67a38de0 |
627 | ary = AvARRAY(av); |
628 | Move(ary, ary + num, i + 1, SV*); |
629 | do { |
3280af22 |
630 | ary[--num] = &PL_sv_undef; |
67a38de0 |
631 | } while (num); |
e2b534e7 |
632 | /* Make extra elements into a buffer */ |
633 | AvMAX(av) -= slide; |
634 | AvFILLp(av) -= slide; |
f880fe2f |
635 | SvPV_set(av, (char*)(AvARRAY(av) + slide)); |
79072805 |
636 | } |
637 | } |
638 | |
cb50131a |
639 | /* |
640 | =for apidoc av_shift |
641 | |
642 | Shifts an SV off the beginning of the array. |
643 | |
644 | =cut |
645 | */ |
646 | |
79072805 |
647 | SV * |
864dbfa3 |
648 | Perl_av_shift(pTHX_ register AV *av) |
79072805 |
649 | { |
27da23d5 |
650 | dVAR; |
79072805 |
651 | SV *retval; |
93965878 |
652 | MAGIC* mg; |
79072805 |
653 | |
ba5d1d60 |
654 | assert(av); |
655 | |
43fcc5d2 |
656 | if (SvREADONLY(av)) |
cea2e8a9 |
657 | Perl_croak(aTHX_ PL_no_modify); |
14befaf4 |
658 | if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) { |
93965878 |
659 | dSP; |
e788e7d3 |
660 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 |
661 | PUSHMARK(SP); |
33c27489 |
662 | XPUSHs(SvTIED_obj((SV*)av, mg)); |
a60c0954 |
663 | PUTBACK; |
664 | ENTER; |
864dbfa3 |
665 | if (call_method("SHIFT", G_SCALAR)) { |
3280af22 |
666 | retval = newSVsv(*PL_stack_sp--); |
93965878 |
667 | } else { |
3280af22 |
668 | retval = &PL_sv_undef; |
a60c0954 |
669 | } |
670 | LEAVE; |
d3acc0f7 |
671 | POPSTACK; |
93965878 |
672 | return retval; |
673 | } |
d19c0e07 |
674 | if (AvFILL(av) < 0) |
675 | return &PL_sv_undef; |
463ee0b2 |
676 | retval = *AvARRAY(av); |
a0d0e21e |
677 | if (AvREAL(av)) |
3280af22 |
678 | *AvARRAY(av) = &PL_sv_undef; |
f880fe2f |
679 | SvPV_set(av, (char*)(AvARRAY(av) + 1)); |
463ee0b2 |
680 | AvMAX(av)--; |
93965878 |
681 | AvFILLp(av)--; |
8990e307 |
682 | if (SvSMAGICAL(av)) |
463ee0b2 |
683 | mg_set((SV*)av); |
79072805 |
684 | return retval; |
685 | } |
686 | |
cb50131a |
687 | /* |
688 | =for apidoc av_len |
689 | |
690 | Returns the highest index in the array. Returns -1 if the array is |
691 | empty. |
692 | |
693 | =cut |
694 | */ |
695 | |
79072805 |
696 | I32 |
0d46e09a |
697 | Perl_av_len(pTHX_ register const AV *av) |
79072805 |
698 | { |
ba5d1d60 |
699 | assert(av); |
463ee0b2 |
700 | return AvFILL(av); |
79072805 |
701 | } |
702 | |
f3b76584 |
703 | /* |
704 | =for apidoc av_fill |
705 | |
706 | Ensure than an array has a given number of elements, equivalent to |
707 | Perl's C<$#array = $fill;>. |
708 | |
709 | =cut |
710 | */ |
79072805 |
711 | void |
864dbfa3 |
712 | Perl_av_fill(pTHX_ register AV *av, I32 fill) |
79072805 |
713 | { |
27da23d5 |
714 | dVAR; |
93965878 |
715 | MAGIC *mg; |
ba5d1d60 |
716 | |
717 | assert(av); |
718 | |
79072805 |
719 | if (fill < 0) |
720 | fill = -1; |
14befaf4 |
721 | if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) { |
93965878 |
722 | dSP; |
723 | ENTER; |
724 | SAVETMPS; |
e788e7d3 |
725 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 |
726 | PUSHMARK(SP); |
727 | EXTEND(SP,2); |
33c27489 |
728 | PUSHs(SvTIED_obj((SV*)av, mg)); |
a60c0954 |
729 | PUSHs(sv_2mortal(newSViv(fill+1))); |
93965878 |
730 | PUTBACK; |
864dbfa3 |
731 | call_method("STORESIZE", G_SCALAR|G_DISCARD); |
d3acc0f7 |
732 | POPSTACK; |
93965878 |
733 | FREETMPS; |
734 | LEAVE; |
735 | return; |
736 | } |
463ee0b2 |
737 | if (fill <= AvMAX(av)) { |
93965878 |
738 | I32 key = AvFILLp(av); |
fabdb6c0 |
739 | SV** const ary = AvARRAY(av); |
a0d0e21e |
740 | |
741 | if (AvREAL(av)) { |
742 | while (key > fill) { |
743 | SvREFCNT_dec(ary[key]); |
3280af22 |
744 | ary[key--] = &PL_sv_undef; |
a0d0e21e |
745 | } |
746 | } |
747 | else { |
748 | while (key < fill) |
3280af22 |
749 | ary[++key] = &PL_sv_undef; |
a0d0e21e |
750 | } |
751 | |
93965878 |
752 | AvFILLp(av) = fill; |
8990e307 |
753 | if (SvSMAGICAL(av)) |
463ee0b2 |
754 | mg_set((SV*)av); |
755 | } |
a0d0e21e |
756 | else |
3280af22 |
757 | (void)av_store(av,fill,&PL_sv_undef); |
79072805 |
758 | } |
c750a3ec |
759 | |
f3b76584 |
760 | /* |
761 | =for apidoc av_delete |
762 | |
763 | Deletes the element indexed by C<key> from the array. Returns the |
a6214072 |
764 | deleted element. If C<flags> equals C<G_DISCARD>, the element is freed |
765 | and null is returned. |
f3b76584 |
766 | |
767 | =cut |
768 | */ |
146174a9 |
769 | SV * |
770 | Perl_av_delete(pTHX_ AV *av, I32 key, I32 flags) |
771 | { |
772 | SV *sv; |
773 | |
ba5d1d60 |
774 | assert(av); |
775 | |
146174a9 |
776 | if (SvREADONLY(av)) |
777 | Perl_croak(aTHX_ PL_no_modify); |
6f12eb6d |
778 | |
779 | if (SvRMAGICAL(av)) { |
35a4481c |
780 | const MAGIC * const tied_magic = mg_find((SV*)av, PERL_MAGIC_tied); |
6f12eb6d |
781 | if ((tied_magic || mg_find((SV*)av, PERL_MAGIC_regdata))) { |
782 | /* Handle negative array indices 20020222 MJD */ |
35a4481c |
783 | SV **svp; |
6f12eb6d |
784 | if (key < 0) { |
785 | unsigned adjust_index = 1; |
786 | if (tied_magic) { |
823a54a3 |
787 | SV * const * const negative_indices_glob = |
6f12eb6d |
788 | hv_fetch(SvSTASH(SvRV(SvTIED_obj((SV *)av, |
789 | tied_magic))), |
790 | NEGATIVE_INDICES_VAR, 16, 0); |
791 | if (negative_indices_glob |
792 | && SvTRUE(GvSV(*negative_indices_glob))) |
793 | adjust_index = 0; |
794 | } |
795 | if (adjust_index) { |
796 | key += AvFILL(av) + 1; |
797 | if (key < 0) |
fabdb6c0 |
798 | return NULL; |
6f12eb6d |
799 | } |
800 | } |
801 | svp = av_fetch(av, key, TRUE); |
802 | if (svp) { |
803 | sv = *svp; |
804 | mg_clear(sv); |
805 | if (mg_find(sv, PERL_MAGIC_tiedelem)) { |
806 | sv_unmagic(sv, PERL_MAGIC_tiedelem); /* No longer an element */ |
807 | return sv; |
808 | } |
fabdb6c0 |
809 | return NULL; |
6f12eb6d |
810 | } |
811 | } |
812 | } |
813 | |
146174a9 |
814 | if (key < 0) { |
815 | key += AvFILL(av) + 1; |
816 | if (key < 0) |
fabdb6c0 |
817 | return NULL; |
146174a9 |
818 | } |
6f12eb6d |
819 | |
146174a9 |
820 | if (key > AvFILLp(av)) |
fabdb6c0 |
821 | return NULL; |
146174a9 |
822 | else { |
a6214072 |
823 | if (!AvREAL(av) && AvREIFY(av)) |
824 | av_reify(av); |
146174a9 |
825 | sv = AvARRAY(av)[key]; |
826 | if (key == AvFILLp(av)) { |
d9c63288 |
827 | AvARRAY(av)[key] = &PL_sv_undef; |
146174a9 |
828 | do { |
829 | AvFILLp(av)--; |
830 | } while (--key >= 0 && AvARRAY(av)[key] == &PL_sv_undef); |
831 | } |
832 | else |
833 | AvARRAY(av)[key] = &PL_sv_undef; |
834 | if (SvSMAGICAL(av)) |
835 | mg_set((SV*)av); |
836 | } |
837 | if (flags & G_DISCARD) { |
838 | SvREFCNT_dec(sv); |
fabdb6c0 |
839 | sv = NULL; |
146174a9 |
840 | } |
fdb3bdd0 |
841 | else if (AvREAL(av)) |
2c8ddff3 |
842 | sv = sv_2mortal(sv); |
146174a9 |
843 | return sv; |
844 | } |
845 | |
846 | /* |
f3b76584 |
847 | =for apidoc av_exists |
848 | |
849 | Returns true if the element indexed by C<key> has been initialized. |
146174a9 |
850 | |
f3b76584 |
851 | This relies on the fact that uninitialized array elements are set to |
852 | C<&PL_sv_undef>. |
853 | |
854 | =cut |
855 | */ |
146174a9 |
856 | bool |
857 | Perl_av_exists(pTHX_ AV *av, I32 key) |
858 | { |
ba5d1d60 |
859 | assert(av); |
6f12eb6d |
860 | |
861 | if (SvRMAGICAL(av)) { |
35a4481c |
862 | const MAGIC * const tied_magic = mg_find((SV*)av, PERL_MAGIC_tied); |
6f12eb6d |
863 | if (tied_magic || mg_find((SV*)av, PERL_MAGIC_regdata)) { |
fabdb6c0 |
864 | SV * const sv = sv_newmortal(); |
6f12eb6d |
865 | MAGIC *mg; |
866 | /* Handle negative array indices 20020222 MJD */ |
867 | if (key < 0) { |
868 | unsigned adjust_index = 1; |
869 | if (tied_magic) { |
823a54a3 |
870 | SV * const * const negative_indices_glob = |
6f12eb6d |
871 | hv_fetch(SvSTASH(SvRV(SvTIED_obj((SV *)av, |
872 | tied_magic))), |
873 | NEGATIVE_INDICES_VAR, 16, 0); |
874 | if (negative_indices_glob |
875 | && SvTRUE(GvSV(*negative_indices_glob))) |
876 | adjust_index = 0; |
877 | } |
878 | if (adjust_index) { |
879 | key += AvFILL(av) + 1; |
880 | if (key < 0) |
881 | return FALSE; |
882 | } |
883 | } |
884 | |
885 | mg_copy((SV*)av, sv, 0, key); |
886 | mg = mg_find(sv, PERL_MAGIC_tiedelem); |
887 | if (mg) { |
888 | magic_existspack(sv, mg); |
889 | return (bool)SvTRUE(sv); |
890 | } |
891 | |
892 | } |
893 | } |
894 | |
146174a9 |
895 | if (key < 0) { |
896 | key += AvFILL(av) + 1; |
897 | if (key < 0) |
898 | return FALSE; |
899 | } |
6f12eb6d |
900 | |
146174a9 |
901 | if (key <= AvFILLp(av) && AvARRAY(av)[key] != &PL_sv_undef |
902 | && AvARRAY(av)[key]) |
903 | { |
904 | return TRUE; |
905 | } |
906 | else |
907 | return FALSE; |
908 | } |
66610fdd |
909 | |
a3874608 |
910 | SV ** |
911 | Perl_av_arylen_p(pTHX_ AV *av) { |
912 | dVAR; |
ba5d1d60 |
913 | MAGIC *mg; |
914 | |
915 | assert(av); |
916 | |
917 | mg = mg_find((SV*)av, PERL_MAGIC_arylen_p); |
a3874608 |
918 | |
919 | if (!mg) { |
1b20cd17 |
920 | mg = sv_magicext((SV*)av, 0, PERL_MAGIC_arylen_p, &PL_vtbl_arylen_p, |
921 | 0, 0); |
c82c7adc |
922 | assert(mg); |
a3874608 |
923 | /* sv_magicext won't set this for us because we pass in a NULL obj */ |
924 | mg->mg_flags |= MGf_REFCOUNTED; |
925 | } |
926 | return &(mg->mg_obj); |
927 | } |
928 | |
66610fdd |
929 | /* |
930 | * Local variables: |
931 | * c-indentation-style: bsd |
932 | * c-basic-offset: 4 |
933 | * indent-tabs-mode: t |
934 | * End: |
935 | * |
37442d52 |
936 | * ex: set ts=8 sts=4 sw=4 noet: |
937 | */ |