Commit | Line | Data |
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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 LW |
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 LW |
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 LW |
14 | */ |
15 | ||
ccfc67b7 JH |
16 | /* |
17 | =head1 Array Manipulation Functions | |
18 | */ | |
19 | ||
79072805 | 20 | #include "EXTERN.h" |
864dbfa3 | 21 | #define PERL_IN_AV_C |
79072805 LW |
22 | #include "perl.h" |
23 | ||
fb73857a | 24 | void |
864dbfa3 | 25 | Perl_av_reify(pTHX_ AV *av) |
a0d0e21e LW |
26 | { |
27 | I32 key; | |
fb73857a | 28 | |
3c78fafa GS |
29 | if (AvREAL(av)) |
30 | return; | |
93965878 | 31 | #ifdef DEBUGGING |
14befaf4 | 32 | if (SvTIED_mg((SV*)av, PERL_MAGIC_tied) && ckWARN_d(WARN_DEBUGGING)) |
9014280d | 33 | Perl_warner(aTHX_ packWARN(WARN_DEBUGGING), "av_reify called on tied array"); |
93965878 | 34 | #endif |
a0d0e21e | 35 | key = AvMAX(av) + 1; |
93965878 | 36 | while (key > AvFILLp(av) + 1) |
3280af22 | 37 | AvARRAY(av)[--key] = &PL_sv_undef; |
a0d0e21e | 38 | while (key) { |
4373e329 | 39 | SV * const sv = AvARRAY(av)[--key]; |
a0d0e21e | 40 | assert(sv); |
411caa50 | 41 | if (sv != &PL_sv_undef) |
a0d0e21e LW |
42 | (void)SvREFCNT_inc(sv); |
43 | } | |
29de640a CS |
44 | key = AvARRAY(av) - AvALLOC(av); |
45 | while (key) | |
3280af22 | 46 | AvALLOC(av)[--key] = &PL_sv_undef; |
62b1ebc2 | 47 | AvREIFY_off(av); |
a0d0e21e LW |
48 | AvREAL_on(av); |
49 | } | |
50 | ||
cb50131a CB |
51 | /* |
52 | =for apidoc av_extend | |
53 | ||
54 | Pre-extend an array. The C<key> is the index to which the array should be | |
55 | extended. | |
56 | ||
57 | =cut | |
58 | */ | |
59 | ||
a0d0e21e | 60 | void |
864dbfa3 | 61 | Perl_av_extend(pTHX_ AV *av, I32 key) |
a0d0e21e | 62 | { |
93965878 | 63 | MAGIC *mg; |
14befaf4 | 64 | if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) { |
93965878 NIS |
65 | dSP; |
66 | ENTER; | |
67 | SAVETMPS; | |
e788e7d3 | 68 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 GS |
69 | PUSHMARK(SP); |
70 | EXTEND(SP,2); | |
33c27489 | 71 | PUSHs(SvTIED_obj((SV*)av, mg)); |
a60c0954 | 72 | PUSHs(sv_2mortal(newSViv(key+1))); |
93965878 | 73 | PUTBACK; |
864dbfa3 | 74 | call_method("EXTEND", G_SCALAR|G_DISCARD); |
d3acc0f7 | 75 | POPSTACK; |
93965878 NIS |
76 | FREETMPS; |
77 | LEAVE; | |
78 | return; | |
79 | } | |
a0d0e21e LW |
80 | if (key > AvMAX(av)) { |
81 | SV** ary; | |
82 | I32 tmp; | |
83 | I32 newmax; | |
84 | ||
85 | if (AvALLOC(av) != AvARRAY(av)) { | |
93965878 | 86 | ary = AvALLOC(av) + AvFILLp(av) + 1; |
a0d0e21e | 87 | tmp = AvARRAY(av) - AvALLOC(av); |
93965878 | 88 | Move(AvARRAY(av), AvALLOC(av), AvFILLp(av)+1, SV*); |
a0d0e21e | 89 | AvMAX(av) += tmp; |
f880fe2f | 90 | SvPV_set(av, (char*)AvALLOC(av)); |
a0d0e21e LW |
91 | if (AvREAL(av)) { |
92 | while (tmp) | |
3280af22 | 93 | ary[--tmp] = &PL_sv_undef; |
a0d0e21e LW |
94 | } |
95 | ||
96 | if (key > AvMAX(av) - 10) { | |
97 | newmax = key + AvMAX(av); | |
98 | goto resize; | |
99 | } | |
100 | } | |
101 | else { | |
2b573ace JH |
102 | #ifdef PERL_MALLOC_WRAP |
103 | static const char oom_array_extend[] = | |
104 | "Out of memory during array extend"; /* Duplicated in pp_hot.c */ | |
105 | #endif | |
106 | ||
a0d0e21e | 107 | if (AvALLOC(av)) { |
516a5887 | 108 | #if !defined(STRANGE_MALLOC) && !defined(MYMALLOC) |
c1f7b11a SB |
109 | MEM_SIZE bytes; |
110 | IV itmp; | |
c07a80fd | 111 | #endif |
4633a7c4 | 112 | |
7bab3ede | 113 | #ifdef MYMALLOC |
8d6dde3e IZ |
114 | newmax = malloced_size((void*)AvALLOC(av))/sizeof(SV*) - 1; |
115 | ||
116 | if (key <= newmax) | |
117 | goto resized; | |
118 | #endif | |
a0d0e21e LW |
119 | newmax = key + AvMAX(av) / 5; |
120 | resize: | |
2b573ace | 121 | MEM_WRAP_CHECK_1(newmax+1, SV*, oom_array_extend); |
8d6dde3e | 122 | #if defined(STRANGE_MALLOC) || defined(MYMALLOC) |
a0d0e21e | 123 | Renew(AvALLOC(av),newmax+1, SV*); |
4633a7c4 LW |
124 | #else |
125 | bytes = (newmax + 1) * sizeof(SV*); | |
126 | #define MALLOC_OVERHEAD 16 | |
c1f7b11a | 127 | itmp = MALLOC_OVERHEAD; |
eb160463 | 128 | while ((MEM_SIZE)(itmp - MALLOC_OVERHEAD) < bytes) |
c1f7b11a SB |
129 | itmp += itmp; |
130 | itmp -= MALLOC_OVERHEAD; | |
131 | itmp /= sizeof(SV*); | |
132 | assert(itmp > newmax); | |
133 | newmax = itmp - 1; | |
134 | assert(newmax >= AvMAX(av)); | |
4633a7c4 LW |
135 | New(2,ary, newmax+1, SV*); |
136 | Copy(AvALLOC(av), ary, AvMAX(av)+1, SV*); | |
fba3b22e MB |
137 | if (AvMAX(av) > 64) |
138 | offer_nice_chunk(AvALLOC(av), (AvMAX(av)+1) * sizeof(SV*)); | |
4633a7c4 LW |
139 | else |
140 | Safefree(AvALLOC(av)); | |
141 | AvALLOC(av) = ary; | |
142 | #endif | |
7bab3ede | 143 | #ifdef MYMALLOC |
8d6dde3e | 144 | resized: |
9c5ffd7c | 145 | #endif |
a0d0e21e LW |
146 | ary = AvALLOC(av) + AvMAX(av) + 1; |
147 | tmp = newmax - AvMAX(av); | |
3280af22 NIS |
148 | if (av == PL_curstack) { /* Oops, grew stack (via av_store()?) */ |
149 | PL_stack_sp = AvALLOC(av) + (PL_stack_sp - PL_stack_base); | |
150 | PL_stack_base = AvALLOC(av); | |
151 | PL_stack_max = PL_stack_base + newmax; | |
a0d0e21e LW |
152 | } |
153 | } | |
154 | else { | |
8d6dde3e | 155 | newmax = key < 3 ? 3 : key; |
2b573ace | 156 | MEM_WRAP_CHECK_1(newmax+1, SV*, oom_array_extend); |
a0d0e21e LW |
157 | New(2,AvALLOC(av), newmax+1, SV*); |
158 | ary = AvALLOC(av) + 1; | |
159 | tmp = newmax; | |
3280af22 | 160 | AvALLOC(av)[0] = &PL_sv_undef; /* For the stacks */ |
a0d0e21e LW |
161 | } |
162 | if (AvREAL(av)) { | |
163 | while (tmp) | |
3280af22 | 164 | ary[--tmp] = &PL_sv_undef; |
a0d0e21e LW |
165 | } |
166 | ||
f880fe2f | 167 | SvPV_set(av, (char*)AvALLOC(av)); |
a0d0e21e LW |
168 | AvMAX(av) = newmax; |
169 | } | |
170 | } | |
171 | } | |
172 | ||
cb50131a CB |
173 | /* |
174 | =for apidoc av_fetch | |
175 | ||
176 | Returns the SV at the specified index in the array. The C<key> is the | |
177 | index. If C<lval> is set then the fetch will be part of a store. Check | |
178 | that the return value is non-null before dereferencing it to a C<SV*>. | |
179 | ||
180 | See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for | |
181 | more information on how to use this function on tied arrays. | |
182 | ||
183 | =cut | |
184 | */ | |
185 | ||
79072805 | 186 | SV** |
864dbfa3 | 187 | Perl_av_fetch(pTHX_ register AV *av, I32 key, I32 lval) |
79072805 LW |
188 | { |
189 | SV *sv; | |
190 | ||
a0d0e21e LW |
191 | if (!av) |
192 | return 0; | |
193 | ||
6f12eb6d | 194 | if (SvRMAGICAL(av)) { |
35a4481c | 195 | const MAGIC * const tied_magic = mg_find((SV*)av, PERL_MAGIC_tied); |
6f12eb6d MJD |
196 | if (tied_magic || mg_find((SV*)av, PERL_MAGIC_regdata)) { |
197 | U32 adjust_index = 1; | |
198 | ||
199 | if (tied_magic && key < 0) { | |
200 | /* Handle negative array indices 20020222 MJD */ | |
201 | SV **negative_indices_glob = | |
202 | hv_fetch(SvSTASH(SvRV(SvTIED_obj((SV *)av, | |
203 | tied_magic))), | |
204 | NEGATIVE_INDICES_VAR, 16, 0); | |
205 | ||
206 | if (negative_indices_glob | |
207 | && SvTRUE(GvSV(*negative_indices_glob))) | |
208 | adjust_index = 0; | |
209 | } | |
210 | ||
211 | if (key < 0 && adjust_index) { | |
212 | key += AvFILL(av) + 1; | |
213 | if (key < 0) | |
214 | return 0; | |
215 | } | |
216 | ||
217 | sv = sv_newmortal(); | |
dd28f7bb DM |
218 | sv_upgrade(sv, SVt_PVLV); |
219 | mg_copy((SV*)av, sv, 0, key); | |
220 | LvTYPE(sv) = 't'; | |
221 | LvTARG(sv) = sv; /* fake (SV**) */ | |
222 | return &(LvTARG(sv)); | |
6f12eb6d MJD |
223 | } |
224 | } | |
225 | ||
93965878 NIS |
226 | if (key < 0) { |
227 | key += AvFILL(av) + 1; | |
228 | if (key < 0) | |
229 | return 0; | |
230 | } | |
231 | ||
93965878 | 232 | if (key > AvFILLp(av)) { |
a0d0e21e LW |
233 | if (!lval) |
234 | return 0; | |
352edd90 | 235 | sv = NEWSV(5,0); |
a0d0e21e | 236 | return av_store(av,key,sv); |
79072805 | 237 | } |
3280af22 | 238 | if (AvARRAY(av)[key] == &PL_sv_undef) { |
4dbf4341 | 239 | emptyness: |
79072805 LW |
240 | if (lval) { |
241 | sv = NEWSV(6,0); | |
463ee0b2 | 242 | return av_store(av,key,sv); |
79072805 LW |
243 | } |
244 | return 0; | |
245 | } | |
4dbf4341 | 246 | else if (AvREIFY(av) |
247 | && (!AvARRAY(av)[key] /* eg. @_ could have freed elts */ | |
248 | || SvTYPE(AvARRAY(av)[key]) == SVTYPEMASK)) { | |
3280af22 | 249 | AvARRAY(av)[key] = &PL_sv_undef; /* 1/2 reify */ |
4dbf4341 | 250 | goto emptyness; |
251 | } | |
463ee0b2 | 252 | return &AvARRAY(av)[key]; |
79072805 LW |
253 | } |
254 | ||
cb50131a CB |
255 | /* |
256 | =for apidoc av_store | |
257 | ||
258 | Stores an SV in an array. The array index is specified as C<key>. The | |
259 | return value will be NULL if the operation failed or if the value did not | |
260 | need to be actually stored within the array (as in the case of tied | |
261 | arrays). Otherwise it can be dereferenced to get the original C<SV*>. Note | |
262 | that the caller is responsible for suitably incrementing the reference | |
263 | count of C<val> before the call, and decrementing it if the function | |
264 | returned NULL. | |
265 | ||
266 | See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for | |
267 | more information on how to use this function on tied arrays. | |
268 | ||
269 | =cut | |
270 | */ | |
271 | ||
79072805 | 272 | SV** |
864dbfa3 | 273 | Perl_av_store(pTHX_ register AV *av, I32 key, SV *val) |
79072805 | 274 | { |
79072805 LW |
275 | SV** ary; |
276 | ||
a0d0e21e LW |
277 | if (!av) |
278 | return 0; | |
43fcc5d2 | 279 | if (!val) |
3280af22 | 280 | val = &PL_sv_undef; |
463ee0b2 | 281 | |
6f12eb6d | 282 | if (SvRMAGICAL(av)) { |
35a4481c | 283 | const MAGIC * const tied_magic = mg_find((SV*)av, PERL_MAGIC_tied); |
6f12eb6d MJD |
284 | if (tied_magic) { |
285 | /* Handle negative array indices 20020222 MJD */ | |
286 | if (key < 0) { | |
287 | unsigned adjust_index = 1; | |
288 | SV **negative_indices_glob = | |
289 | hv_fetch(SvSTASH(SvRV(SvTIED_obj((SV *)av, | |
290 | tied_magic))), | |
291 | NEGATIVE_INDICES_VAR, 16, 0); | |
292 | if (negative_indices_glob | |
293 | && SvTRUE(GvSV(*negative_indices_glob))) | |
294 | adjust_index = 0; | |
295 | if (adjust_index) { | |
296 | key += AvFILL(av) + 1; | |
297 | if (key < 0) | |
298 | return 0; | |
299 | } | |
300 | } | |
301 | if (val != &PL_sv_undef) { | |
302 | mg_copy((SV*)av, val, 0, key); | |
303 | } | |
304 | return 0; | |
305 | } | |
306 | } | |
307 | ||
308 | ||
a0d0e21e LW |
309 | if (key < 0) { |
310 | key += AvFILL(av) + 1; | |
311 | if (key < 0) | |
312 | return 0; | |
79072805 | 313 | } |
93965878 | 314 | |
43fcc5d2 | 315 | if (SvREADONLY(av) && key >= AvFILL(av)) |
cea2e8a9 | 316 | Perl_croak(aTHX_ PL_no_modify); |
93965878 | 317 | |
49beac48 | 318 | if (!AvREAL(av) && AvREIFY(av)) |
a0d0e21e | 319 | av_reify(av); |
a0d0e21e LW |
320 | if (key > AvMAX(av)) |
321 | av_extend(av,key); | |
463ee0b2 | 322 | ary = AvARRAY(av); |
93965878 | 323 | if (AvFILLp(av) < key) { |
a0d0e21e | 324 | if (!AvREAL(av)) { |
3280af22 NIS |
325 | if (av == PL_curstack && key > PL_stack_sp - PL_stack_base) |
326 | PL_stack_sp = PL_stack_base + key; /* XPUSH in disguise */ | |
a0d0e21e | 327 | do |
3280af22 | 328 | ary[++AvFILLp(av)] = &PL_sv_undef; |
93965878 | 329 | while (AvFILLp(av) < key); |
79072805 | 330 | } |
93965878 | 331 | AvFILLp(av) = key; |
79072805 | 332 | } |
a0d0e21e LW |
333 | else if (AvREAL(av)) |
334 | SvREFCNT_dec(ary[key]); | |
79072805 | 335 | ary[key] = val; |
8990e307 | 336 | if (SvSMAGICAL(av)) { |
3280af22 | 337 | if (val != &PL_sv_undef) { |
a0d0e21e LW |
338 | MAGIC* mg = SvMAGIC(av); |
339 | sv_magic(val, (SV*)av, toLOWER(mg->mg_type), 0, key); | |
340 | } | |
463ee0b2 LW |
341 | mg_set((SV*)av); |
342 | } | |
79072805 LW |
343 | return &ary[key]; |
344 | } | |
345 | ||
cb50131a CB |
346 | /* |
347 | =for apidoc newAV | |
348 | ||
349 | Creates a new AV. The reference count is set to 1. | |
350 | ||
351 | =cut | |
352 | */ | |
353 | ||
79072805 | 354 | AV * |
864dbfa3 | 355 | Perl_newAV(pTHX) |
79072805 | 356 | { |
463ee0b2 | 357 | register AV *av; |
79072805 | 358 | |
a0d0e21e LW |
359 | av = (AV*)NEWSV(3,0); |
360 | sv_upgrade((SV *)av, SVt_PVAV); | |
463ee0b2 LW |
361 | AvREAL_on(av); |
362 | AvALLOC(av) = 0; | |
f880fe2f | 363 | SvPV_set(av, (char*)0); |
93965878 | 364 | AvMAX(av) = AvFILLp(av) = -1; |
463ee0b2 | 365 | return av; |
79072805 LW |
366 | } |
367 | ||
cb50131a CB |
368 | /* |
369 | =for apidoc av_make | |
370 | ||
371 | Creates a new AV and populates it with a list of SVs. The SVs are copied | |
372 | into the array, so they may be freed after the call to av_make. The new AV | |
373 | will have a reference count of 1. | |
374 | ||
375 | =cut | |
376 | */ | |
377 | ||
79072805 | 378 | AV * |
864dbfa3 | 379 | Perl_av_make(pTHX_ register I32 size, register SV **strp) |
79072805 | 380 | { |
463ee0b2 | 381 | register AV *av; |
79072805 | 382 | |
a0d0e21e LW |
383 | av = (AV*)NEWSV(8,0); |
384 | sv_upgrade((SV *) av,SVt_PVAV); | |
a0d0e21e | 385 | AvFLAGS(av) = AVf_REAL; |
573fa4ea | 386 | if (size) { /* `defined' was returning undef for size==0 anyway. */ |
dd374669 AL |
387 | register SV** ary; |
388 | register I32 i; | |
573fa4ea TB |
389 | New(4,ary,size,SV*); |
390 | AvALLOC(av) = ary; | |
f880fe2f | 391 | SvPV_set(av, (char*)ary); |
93965878 | 392 | AvFILLp(av) = size - 1; |
573fa4ea TB |
393 | AvMAX(av) = size - 1; |
394 | for (i = 0; i < size; i++) { | |
395 | assert (*strp); | |
396 | ary[i] = NEWSV(7,0); | |
397 | sv_setsv(ary[i], *strp); | |
398 | strp++; | |
399 | } | |
79072805 | 400 | } |
463ee0b2 | 401 | return av; |
79072805 LW |
402 | } |
403 | ||
404 | AV * | |
864dbfa3 | 405 | Perl_av_fake(pTHX_ register I32 size, register SV **strp) |
79072805 | 406 | { |
463ee0b2 | 407 | register AV *av; |
79072805 LW |
408 | register SV** ary; |
409 | ||
a0d0e21e LW |
410 | av = (AV*)NEWSV(9,0); |
411 | sv_upgrade((SV *)av, SVt_PVAV); | |
79072805 | 412 | New(4,ary,size+1,SV*); |
463ee0b2 | 413 | AvALLOC(av) = ary; |
79072805 | 414 | Copy(strp,ary,size,SV*); |
a0d0e21e | 415 | AvFLAGS(av) = AVf_REIFY; |
f880fe2f | 416 | SvPV_set(av, (char*)ary); |
93965878 | 417 | AvFILLp(av) = size - 1; |
463ee0b2 | 418 | AvMAX(av) = size - 1; |
79072805 | 419 | while (size--) { |
a0d0e21e LW |
420 | assert (*strp); |
421 | SvTEMP_off(*strp); | |
79072805 LW |
422 | strp++; |
423 | } | |
463ee0b2 | 424 | return av; |
79072805 LW |
425 | } |
426 | ||
cb50131a CB |
427 | /* |
428 | =for apidoc av_clear | |
429 | ||
430 | Clears an array, making it empty. Does not free the memory used by the | |
431 | array itself. | |
432 | ||
433 | =cut | |
434 | */ | |
435 | ||
79072805 | 436 | void |
864dbfa3 | 437 | Perl_av_clear(pTHX_ register AV *av) |
79072805 LW |
438 | { |
439 | register I32 key; | |
440 | ||
7d55f622 | 441 | #ifdef DEBUGGING |
32da55ab | 442 | if (SvREFCNT(av) == 0 && ckWARN_d(WARN_DEBUGGING)) { |
9014280d | 443 | Perl_warner(aTHX_ packWARN(WARN_DEBUGGING), "Attempt to clear deleted array"); |
7d55f622 | 444 | } |
445 | #endif | |
a60c0954 | 446 | if (!av) |
79072805 LW |
447 | return; |
448 | /*SUPPRESS 560*/ | |
a0d0e21e | 449 | |
39caa665 | 450 | if (SvREADONLY(av)) |
cea2e8a9 | 451 | Perl_croak(aTHX_ PL_no_modify); |
39caa665 | 452 | |
93965878 NIS |
453 | /* Give any tie a chance to cleanup first */ |
454 | if (SvRMAGICAL(av)) | |
455 | mg_clear((SV*)av); | |
456 | ||
a60c0954 NIS |
457 | if (AvMAX(av) < 0) |
458 | return; | |
459 | ||
a0d0e21e | 460 | if (AvREAL(av)) { |
dd374669 | 461 | SV** ary = AvARRAY(av); |
93965878 | 462 | key = AvFILLp(av) + 1; |
a0d0e21e | 463 | while (key) { |
6b42d12b DM |
464 | SV * sv = ary[--key]; |
465 | /* undef the slot before freeing the value, because a | |
466 | * destructor might try to modify this arrray */ | |
3280af22 | 467 | ary[key] = &PL_sv_undef; |
6b42d12b | 468 | SvREFCNT_dec(sv); |
a0d0e21e LW |
469 | } |
470 | } | |
155aba94 | 471 | if ((key = AvARRAY(av) - AvALLOC(av))) { |
463ee0b2 | 472 | AvMAX(av) += key; |
f880fe2f | 473 | SvPV_set(av, (char*)AvALLOC(av)); |
79072805 | 474 | } |
93965878 | 475 | AvFILLp(av) = -1; |
fb73857a | 476 | |
79072805 LW |
477 | } |
478 | ||
cb50131a CB |
479 | /* |
480 | =for apidoc av_undef | |
481 | ||
482 | Undefines the array. Frees the memory used by the array itself. | |
483 | ||
484 | =cut | |
485 | */ | |
486 | ||
79072805 | 487 | void |
864dbfa3 | 488 | Perl_av_undef(pTHX_ register AV *av) |
79072805 LW |
489 | { |
490 | register I32 key; | |
491 | ||
463ee0b2 | 492 | if (!av) |
79072805 LW |
493 | return; |
494 | /*SUPPRESS 560*/ | |
93965878 NIS |
495 | |
496 | /* Give any tie a chance to cleanup first */ | |
14befaf4 | 497 | if (SvTIED_mg((SV*)av, PERL_MAGIC_tied)) |
93965878 NIS |
498 | av_fill(av, -1); /* mg_clear() ? */ |
499 | ||
a0d0e21e | 500 | if (AvREAL(av)) { |
93965878 | 501 | key = AvFILLp(av) + 1; |
a0d0e21e LW |
502 | while (key) |
503 | SvREFCNT_dec(AvARRAY(av)[--key]); | |
504 | } | |
463ee0b2 LW |
505 | Safefree(AvALLOC(av)); |
506 | AvALLOC(av) = 0; | |
f880fe2f | 507 | SvPV_set(av, (char*)0); |
93965878 | 508 | AvMAX(av) = AvFILLp(av) = -1; |
748a9306 LW |
509 | if (AvARYLEN(av)) { |
510 | SvREFCNT_dec(AvARYLEN(av)); | |
511 | AvARYLEN(av) = 0; | |
512 | } | |
79072805 LW |
513 | } |
514 | ||
cb50131a CB |
515 | /* |
516 | =for apidoc av_push | |
517 | ||
518 | Pushes an SV onto the end of the array. The array will grow automatically | |
519 | to accommodate the addition. | |
520 | ||
521 | =cut | |
522 | */ | |
523 | ||
a0d0e21e | 524 | void |
864dbfa3 | 525 | Perl_av_push(pTHX_ register AV *av, SV *val) |
93965878 | 526 | { |
27da23d5 | 527 | dVAR; |
93965878 | 528 | MAGIC *mg; |
a0d0e21e LW |
529 | if (!av) |
530 | return; | |
93965878 | 531 | if (SvREADONLY(av)) |
cea2e8a9 | 532 | Perl_croak(aTHX_ PL_no_modify); |
93965878 | 533 | |
14befaf4 | 534 | if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) { |
93965878 | 535 | dSP; |
e788e7d3 | 536 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 GS |
537 | PUSHMARK(SP); |
538 | EXTEND(SP,2); | |
33c27489 | 539 | PUSHs(SvTIED_obj((SV*)av, mg)); |
93965878 | 540 | PUSHs(val); |
a60c0954 NIS |
541 | PUTBACK; |
542 | ENTER; | |
864dbfa3 | 543 | call_method("PUSH", G_SCALAR|G_DISCARD); |
a60c0954 | 544 | LEAVE; |
d3acc0f7 | 545 | POPSTACK; |
93965878 NIS |
546 | return; |
547 | } | |
548 | av_store(av,AvFILLp(av)+1,val); | |
79072805 LW |
549 | } |
550 | ||
cb50131a CB |
551 | /* |
552 | =for apidoc av_pop | |
553 | ||
554 | Pops an SV off the end of the array. Returns C<&PL_sv_undef> if the array | |
555 | is empty. | |
556 | ||
557 | =cut | |
558 | */ | |
559 | ||
79072805 | 560 | SV * |
864dbfa3 | 561 | Perl_av_pop(pTHX_ register AV *av) |
79072805 | 562 | { |
27da23d5 | 563 | dVAR; |
79072805 | 564 | SV *retval; |
93965878 | 565 | MAGIC* mg; |
79072805 | 566 | |
d19c0e07 MJD |
567 | if (!av) |
568 | return &PL_sv_undef; | |
43fcc5d2 | 569 | if (SvREADONLY(av)) |
cea2e8a9 | 570 | Perl_croak(aTHX_ PL_no_modify); |
14befaf4 | 571 | if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) { |
93965878 | 572 | dSP; |
e788e7d3 | 573 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 | 574 | PUSHMARK(SP); |
33c27489 | 575 | XPUSHs(SvTIED_obj((SV*)av, mg)); |
a60c0954 NIS |
576 | PUTBACK; |
577 | ENTER; | |
864dbfa3 | 578 | if (call_method("POP", G_SCALAR)) { |
3280af22 | 579 | retval = newSVsv(*PL_stack_sp--); |
93965878 | 580 | } else { |
3280af22 | 581 | retval = &PL_sv_undef; |
93965878 | 582 | } |
a60c0954 | 583 | LEAVE; |
d3acc0f7 | 584 | POPSTACK; |
93965878 NIS |
585 | return retval; |
586 | } | |
d19c0e07 MJD |
587 | if (AvFILL(av) < 0) |
588 | return &PL_sv_undef; | |
93965878 | 589 | retval = AvARRAY(av)[AvFILLp(av)]; |
3280af22 | 590 | AvARRAY(av)[AvFILLp(av)--] = &PL_sv_undef; |
8990e307 | 591 | if (SvSMAGICAL(av)) |
463ee0b2 | 592 | mg_set((SV*)av); |
79072805 LW |
593 | return retval; |
594 | } | |
595 | ||
cb50131a CB |
596 | /* |
597 | =for apidoc av_unshift | |
598 | ||
599 | Unshift the given number of C<undef> values onto the beginning of the | |
600 | array. The array will grow automatically to accommodate the addition. You | |
601 | must then use C<av_store> to assign values to these new elements. | |
602 | ||
603 | =cut | |
604 | */ | |
605 | ||
79072805 | 606 | void |
864dbfa3 | 607 | Perl_av_unshift(pTHX_ register AV *av, register I32 num) |
79072805 | 608 | { |
27da23d5 | 609 | dVAR; |
79072805 | 610 | register I32 i; |
67a38de0 | 611 | register SV **ary; |
93965878 | 612 | MAGIC* mg; |
e2b534e7 | 613 | I32 slide; |
79072805 | 614 | |
d19c0e07 | 615 | if (!av) |
79072805 | 616 | return; |
43fcc5d2 | 617 | if (SvREADONLY(av)) |
cea2e8a9 | 618 | Perl_croak(aTHX_ PL_no_modify); |
93965878 | 619 | |
14befaf4 | 620 | if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) { |
93965878 | 621 | dSP; |
e788e7d3 | 622 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 GS |
623 | PUSHMARK(SP); |
624 | EXTEND(SP,1+num); | |
33c27489 | 625 | PUSHs(SvTIED_obj((SV*)av, mg)); |
93965878 | 626 | while (num-- > 0) { |
3280af22 | 627 | PUSHs(&PL_sv_undef); |
93965878 NIS |
628 | } |
629 | PUTBACK; | |
a60c0954 | 630 | ENTER; |
864dbfa3 | 631 | call_method("UNSHIFT", G_SCALAR|G_DISCARD); |
a60c0954 | 632 | LEAVE; |
d3acc0f7 | 633 | POPSTACK; |
93965878 NIS |
634 | return; |
635 | } | |
636 | ||
d19c0e07 MJD |
637 | if (num <= 0) |
638 | return; | |
49beac48 CS |
639 | if (!AvREAL(av) && AvREIFY(av)) |
640 | av_reify(av); | |
a0d0e21e LW |
641 | i = AvARRAY(av) - AvALLOC(av); |
642 | if (i) { | |
643 | if (i > num) | |
644 | i = num; | |
645 | num -= i; | |
646 | ||
647 | AvMAX(av) += i; | |
93965878 | 648 | AvFILLp(av) += i; |
f880fe2f | 649 | SvPV_set(av, (char*)(AvARRAY(av) - i)); |
a0d0e21e | 650 | } |
d2719217 | 651 | if (num) { |
67a38de0 | 652 | i = AvFILLp(av); |
e2b534e7 BT |
653 | /* Create extra elements */ |
654 | slide = i > 0 ? i : 0; | |
655 | num += slide; | |
67a38de0 | 656 | av_extend(av, i + num); |
93965878 | 657 | AvFILLp(av) += num; |
67a38de0 NIS |
658 | ary = AvARRAY(av); |
659 | Move(ary, ary + num, i + 1, SV*); | |
660 | do { | |
3280af22 | 661 | ary[--num] = &PL_sv_undef; |
67a38de0 | 662 | } while (num); |
e2b534e7 BT |
663 | /* Make extra elements into a buffer */ |
664 | AvMAX(av) -= slide; | |
665 | AvFILLp(av) -= slide; | |
f880fe2f | 666 | SvPV_set(av, (char*)(AvARRAY(av) + slide)); |
79072805 LW |
667 | } |
668 | } | |
669 | ||
cb50131a CB |
670 | /* |
671 | =for apidoc av_shift | |
672 | ||
673 | Shifts an SV off the beginning of the array. | |
674 | ||
675 | =cut | |
676 | */ | |
677 | ||
79072805 | 678 | SV * |
864dbfa3 | 679 | Perl_av_shift(pTHX_ register AV *av) |
79072805 | 680 | { |
27da23d5 | 681 | dVAR; |
79072805 | 682 | SV *retval; |
93965878 | 683 | MAGIC* mg; |
79072805 | 684 | |
d19c0e07 | 685 | if (!av) |
3280af22 | 686 | return &PL_sv_undef; |
43fcc5d2 | 687 | if (SvREADONLY(av)) |
cea2e8a9 | 688 | Perl_croak(aTHX_ PL_no_modify); |
14befaf4 | 689 | if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) { |
93965878 | 690 | dSP; |
e788e7d3 | 691 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 | 692 | PUSHMARK(SP); |
33c27489 | 693 | XPUSHs(SvTIED_obj((SV*)av, mg)); |
a60c0954 NIS |
694 | PUTBACK; |
695 | ENTER; | |
864dbfa3 | 696 | if (call_method("SHIFT", G_SCALAR)) { |
3280af22 | 697 | retval = newSVsv(*PL_stack_sp--); |
93965878 | 698 | } else { |
3280af22 | 699 | retval = &PL_sv_undef; |
a60c0954 NIS |
700 | } |
701 | LEAVE; | |
d3acc0f7 | 702 | POPSTACK; |
93965878 NIS |
703 | return retval; |
704 | } | |
d19c0e07 MJD |
705 | if (AvFILL(av) < 0) |
706 | return &PL_sv_undef; | |
463ee0b2 | 707 | retval = *AvARRAY(av); |
a0d0e21e | 708 | if (AvREAL(av)) |
3280af22 | 709 | *AvARRAY(av) = &PL_sv_undef; |
f880fe2f | 710 | SvPV_set(av, (char*)(AvARRAY(av) + 1)); |
463ee0b2 | 711 | AvMAX(av)--; |
93965878 | 712 | AvFILLp(av)--; |
8990e307 | 713 | if (SvSMAGICAL(av)) |
463ee0b2 | 714 | mg_set((SV*)av); |
79072805 LW |
715 | return retval; |
716 | } | |
717 | ||
cb50131a CB |
718 | /* |
719 | =for apidoc av_len | |
720 | ||
721 | Returns the highest index in the array. Returns -1 if the array is | |
722 | empty. | |
723 | ||
724 | =cut | |
725 | */ | |
726 | ||
79072805 | 727 | I32 |
35a4481c | 728 | Perl_av_len(pTHX_ const register AV *av) |
79072805 | 729 | { |
463ee0b2 | 730 | return AvFILL(av); |
79072805 LW |
731 | } |
732 | ||
f3b76584 SC |
733 | /* |
734 | =for apidoc av_fill | |
735 | ||
736 | Ensure than an array has a given number of elements, equivalent to | |
737 | Perl's C<$#array = $fill;>. | |
738 | ||
739 | =cut | |
740 | */ | |
79072805 | 741 | void |
864dbfa3 | 742 | Perl_av_fill(pTHX_ register AV *av, I32 fill) |
79072805 | 743 | { |
27da23d5 | 744 | dVAR; |
93965878 | 745 | MAGIC *mg; |
a0d0e21e | 746 | if (!av) |
cea2e8a9 | 747 | Perl_croak(aTHX_ "panic: null array"); |
79072805 LW |
748 | if (fill < 0) |
749 | fill = -1; | |
14befaf4 | 750 | if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) { |
93965878 NIS |
751 | dSP; |
752 | ENTER; | |
753 | SAVETMPS; | |
e788e7d3 | 754 | PUSHSTACKi(PERLSI_MAGIC); |
924508f0 GS |
755 | PUSHMARK(SP); |
756 | EXTEND(SP,2); | |
33c27489 | 757 | PUSHs(SvTIED_obj((SV*)av, mg)); |
a60c0954 | 758 | PUSHs(sv_2mortal(newSViv(fill+1))); |
93965878 | 759 | PUTBACK; |
864dbfa3 | 760 | call_method("STORESIZE", G_SCALAR|G_DISCARD); |
d3acc0f7 | 761 | POPSTACK; |
93965878 NIS |
762 | FREETMPS; |
763 | LEAVE; | |
764 | return; | |
765 | } | |
463ee0b2 | 766 | if (fill <= AvMAX(av)) { |
93965878 | 767 | I32 key = AvFILLp(av); |
a0d0e21e LW |
768 | SV** ary = AvARRAY(av); |
769 | ||
770 | if (AvREAL(av)) { | |
771 | while (key > fill) { | |
772 | SvREFCNT_dec(ary[key]); | |
3280af22 | 773 | ary[key--] = &PL_sv_undef; |
a0d0e21e LW |
774 | } |
775 | } | |
776 | else { | |
777 | while (key < fill) | |
3280af22 | 778 | ary[++key] = &PL_sv_undef; |
a0d0e21e LW |
779 | } |
780 | ||
93965878 | 781 | AvFILLp(av) = fill; |
8990e307 | 782 | if (SvSMAGICAL(av)) |
463ee0b2 LW |
783 | mg_set((SV*)av); |
784 | } | |
a0d0e21e | 785 | else |
3280af22 | 786 | (void)av_store(av,fill,&PL_sv_undef); |
79072805 | 787 | } |
c750a3ec | 788 | |
f3b76584 SC |
789 | /* |
790 | =for apidoc av_delete | |
791 | ||
792 | Deletes the element indexed by C<key> from the array. Returns the | |
a6214072 DM |
793 | deleted element. If C<flags> equals C<G_DISCARD>, the element is freed |
794 | and null is returned. | |
f3b76584 SC |
795 | |
796 | =cut | |
797 | */ | |
146174a9 CB |
798 | SV * |
799 | Perl_av_delete(pTHX_ AV *av, I32 key, I32 flags) | |
800 | { | |
801 | SV *sv; | |
802 | ||
803 | if (!av) | |
804 | return Nullsv; | |
805 | if (SvREADONLY(av)) | |
806 | Perl_croak(aTHX_ PL_no_modify); | |
6f12eb6d MJD |
807 | |
808 | if (SvRMAGICAL(av)) { | |
35a4481c | 809 | const MAGIC * const tied_magic = mg_find((SV*)av, PERL_MAGIC_tied); |
6f12eb6d MJD |
810 | if ((tied_magic || mg_find((SV*)av, PERL_MAGIC_regdata))) { |
811 | /* Handle negative array indices 20020222 MJD */ | |
35a4481c | 812 | SV **svp; |
6f12eb6d MJD |
813 | if (key < 0) { |
814 | unsigned adjust_index = 1; | |
815 | if (tied_magic) { | |
816 | SV **negative_indices_glob = | |
817 | hv_fetch(SvSTASH(SvRV(SvTIED_obj((SV *)av, | |
818 | tied_magic))), | |
819 | NEGATIVE_INDICES_VAR, 16, 0); | |
820 | if (negative_indices_glob | |
821 | && SvTRUE(GvSV(*negative_indices_glob))) | |
822 | adjust_index = 0; | |
823 | } | |
824 | if (adjust_index) { | |
825 | key += AvFILL(av) + 1; | |
826 | if (key < 0) | |
827 | return Nullsv; | |
828 | } | |
829 | } | |
830 | svp = av_fetch(av, key, TRUE); | |
831 | if (svp) { | |
832 | sv = *svp; | |
833 | mg_clear(sv); | |
834 | if (mg_find(sv, PERL_MAGIC_tiedelem)) { | |
835 | sv_unmagic(sv, PERL_MAGIC_tiedelem); /* No longer an element */ | |
836 | return sv; | |
837 | } | |
838 | return Nullsv; | |
839 | } | |
840 | } | |
841 | } | |
842 | ||
146174a9 CB |
843 | if (key < 0) { |
844 | key += AvFILL(av) + 1; | |
845 | if (key < 0) | |
846 | return Nullsv; | |
847 | } | |
6f12eb6d | 848 | |
146174a9 CB |
849 | if (key > AvFILLp(av)) |
850 | return Nullsv; | |
851 | else { | |
a6214072 DM |
852 | if (!AvREAL(av) && AvREIFY(av)) |
853 | av_reify(av); | |
146174a9 CB |
854 | sv = AvARRAY(av)[key]; |
855 | if (key == AvFILLp(av)) { | |
d9c63288 | 856 | AvARRAY(av)[key] = &PL_sv_undef; |
146174a9 CB |
857 | do { |
858 | AvFILLp(av)--; | |
859 | } while (--key >= 0 && AvARRAY(av)[key] == &PL_sv_undef); | |
860 | } | |
861 | else | |
862 | AvARRAY(av)[key] = &PL_sv_undef; | |
863 | if (SvSMAGICAL(av)) | |
864 | mg_set((SV*)av); | |
865 | } | |
866 | if (flags & G_DISCARD) { | |
867 | SvREFCNT_dec(sv); | |
868 | sv = Nullsv; | |
869 | } | |
fdb3bdd0 | 870 | else if (AvREAL(av)) |
2c8ddff3 | 871 | sv = sv_2mortal(sv); |
146174a9 CB |
872 | return sv; |
873 | } | |
874 | ||
875 | /* | |
f3b76584 SC |
876 | =for apidoc av_exists |
877 | ||
878 | Returns true if the element indexed by C<key> has been initialized. | |
146174a9 | 879 | |
f3b76584 SC |
880 | This relies on the fact that uninitialized array elements are set to |
881 | C<&PL_sv_undef>. | |
882 | ||
883 | =cut | |
884 | */ | |
146174a9 CB |
885 | bool |
886 | Perl_av_exists(pTHX_ AV *av, I32 key) | |
887 | { | |
888 | if (!av) | |
889 | return FALSE; | |
6f12eb6d MJD |
890 | |
891 | ||
892 | if (SvRMAGICAL(av)) { | |
35a4481c | 893 | const MAGIC * const tied_magic = mg_find((SV*)av, PERL_MAGIC_tied); |
6f12eb6d MJD |
894 | if (tied_magic || mg_find((SV*)av, PERL_MAGIC_regdata)) { |
895 | SV *sv = sv_newmortal(); | |
896 | MAGIC *mg; | |
897 | /* Handle negative array indices 20020222 MJD */ | |
898 | if (key < 0) { | |
899 | unsigned adjust_index = 1; | |
900 | if (tied_magic) { | |
901 | SV **negative_indices_glob = | |
902 | hv_fetch(SvSTASH(SvRV(SvTIED_obj((SV *)av, | |
903 | tied_magic))), | |
904 | NEGATIVE_INDICES_VAR, 16, 0); | |
905 | if (negative_indices_glob | |
906 | && SvTRUE(GvSV(*negative_indices_glob))) | |
907 | adjust_index = 0; | |
908 | } | |
909 | if (adjust_index) { | |
910 | key += AvFILL(av) + 1; | |
911 | if (key < 0) | |
912 | return FALSE; | |
913 | } | |
914 | } | |
915 | ||
916 | mg_copy((SV*)av, sv, 0, key); | |
917 | mg = mg_find(sv, PERL_MAGIC_tiedelem); | |
918 | if (mg) { | |
919 | magic_existspack(sv, mg); | |
920 | return (bool)SvTRUE(sv); | |
921 | } | |
922 | ||
923 | } | |
924 | } | |
925 | ||
146174a9 CB |
926 | if (key < 0) { |
927 | key += AvFILL(av) + 1; | |
928 | if (key < 0) | |
929 | return FALSE; | |
930 | } | |
6f12eb6d | 931 | |
146174a9 CB |
932 | if (key <= AvFILLp(av) && AvARRAY(av)[key] != &PL_sv_undef |
933 | && AvARRAY(av)[key]) | |
934 | { | |
935 | return TRUE; | |
936 | } | |
937 | else | |
938 | return FALSE; | |
939 | } | |
66610fdd RGS |
940 | |
941 | /* | |
942 | * Local variables: | |
943 | * c-indentation-style: bsd | |
944 | * c-basic-offset: 4 | |
945 | * indent-tabs-mode: t | |
946 | * End: | |
947 | * | |
37442d52 RGS |
948 | * ex: set ts=8 sts=4 sw=4 noet: |
949 | */ |