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a0d0e21e |
1 | /* av.c |
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2 | * |
9607fc9c |
3 | * Copyright (c) 1991-1997, Larry Wall |
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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 | * "...for the Entwives desired order, and plenty, and peace (by which they |
12 | * meant that things should remain where they had set them)." --Treebeard |
79072805 |
13 | */ |
14 | |
15 | #include "EXTERN.h" |
16 | #include "perl.h" |
17 | |
a0d0e21e |
18 | static void av_reify _((AV* av)); |
19 | |
20 | static void |
21 | av_reify(av) |
22 | AV* av; |
23 | { |
24 | I32 key; |
25 | SV* sv; |
26 | |
27 | key = AvMAX(av) + 1; |
28 | while (key > AvFILL(av) + 1) |
29 | AvARRAY(av)[--key] = &sv_undef; |
30 | while (key) { |
31 | sv = AvARRAY(av)[--key]; |
32 | assert(sv); |
33 | if (sv != &sv_undef) |
34 | (void)SvREFCNT_inc(sv); |
35 | } |
29de640a |
36 | key = AvARRAY(av) - AvALLOC(av); |
37 | while (key) |
38 | AvALLOC(av)[--key] = &sv_undef; |
a0d0e21e |
39 | AvREAL_on(av); |
40 | } |
41 | |
42 | void |
43 | av_extend(av,key) |
44 | AV *av; |
45 | I32 key; |
46 | { |
47 | if (key > AvMAX(av)) { |
48 | SV** ary; |
49 | I32 tmp; |
50 | I32 newmax; |
51 | |
52 | if (AvALLOC(av) != AvARRAY(av)) { |
53 | ary = AvALLOC(av) + AvFILL(av) + 1; |
54 | tmp = AvARRAY(av) - AvALLOC(av); |
55 | Move(AvARRAY(av), AvALLOC(av), AvFILL(av)+1, SV*); |
56 | AvMAX(av) += tmp; |
57 | SvPVX(av) = (char*)AvALLOC(av); |
58 | if (AvREAL(av)) { |
59 | while (tmp) |
60 | ary[--tmp] = &sv_undef; |
61 | } |
62 | |
63 | if (key > AvMAX(av) - 10) { |
64 | newmax = key + AvMAX(av); |
65 | goto resize; |
66 | } |
67 | } |
68 | else { |
69 | if (AvALLOC(av)) { |
c07a80fd |
70 | #ifndef STRANGE_MALLOC |
4633a7c4 |
71 | U32 bytes; |
c07a80fd |
72 | #endif |
4633a7c4 |
73 | |
a0d0e21e |
74 | newmax = key + AvMAX(av) / 5; |
75 | resize: |
4633a7c4 |
76 | #ifdef STRANGE_MALLOC |
a0d0e21e |
77 | Renew(AvALLOC(av),newmax+1, SV*); |
4633a7c4 |
78 | #else |
79 | bytes = (newmax + 1) * sizeof(SV*); |
80 | #define MALLOC_OVERHEAD 16 |
81 | tmp = MALLOC_OVERHEAD; |
82 | while (tmp - MALLOC_OVERHEAD < bytes) |
83 | tmp += tmp; |
84 | tmp -= MALLOC_OVERHEAD; |
85 | tmp /= sizeof(SV*); |
86 | assert(tmp > newmax); |
87 | newmax = tmp - 1; |
88 | New(2,ary, newmax+1, SV*); |
89 | Copy(AvALLOC(av), ary, AvMAX(av)+1, SV*); |
c07a80fd |
90 | if (AvMAX(av) > 64 && !nice_chunk) { |
91 | nice_chunk = (char*)AvALLOC(av); |
92 | nice_chunk_size = (AvMAX(av) + 1) * sizeof(SV*); |
93 | } |
4633a7c4 |
94 | else |
95 | Safefree(AvALLOC(av)); |
96 | AvALLOC(av) = ary; |
97 | #endif |
a0d0e21e |
98 | ary = AvALLOC(av) + AvMAX(av) + 1; |
99 | tmp = newmax - AvMAX(av); |
7d55f622 |
100 | if (av == curstack) { /* Oops, grew stack (via av_store()?) */ |
a0d0e21e |
101 | stack_sp = AvALLOC(av) + (stack_sp - stack_base); |
102 | stack_base = AvALLOC(av); |
103 | stack_max = stack_base + newmax; |
104 | } |
105 | } |
106 | else { |
107 | newmax = key < 4 ? 4 : key; |
108 | New(2,AvALLOC(av), newmax+1, SV*); |
109 | ary = AvALLOC(av) + 1; |
110 | tmp = newmax; |
111 | AvALLOC(av)[0] = &sv_undef; /* For the stacks */ |
112 | } |
113 | if (AvREAL(av)) { |
114 | while (tmp) |
115 | ary[--tmp] = &sv_undef; |
116 | } |
117 | |
118 | SvPVX(av) = (char*)AvALLOC(av); |
119 | AvMAX(av) = newmax; |
120 | } |
121 | } |
122 | } |
123 | |
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124 | SV** |
463ee0b2 |
125 | av_fetch(av,key,lval) |
126 | register AV *av; |
79072805 |
127 | I32 key; |
128 | I32 lval; |
129 | { |
130 | SV *sv; |
131 | |
a0d0e21e |
132 | if (!av) |
133 | return 0; |
134 | |
8990e307 |
135 | if (SvRMAGICAL(av)) { |
463ee0b2 |
136 | if (mg_find((SV*)av,'P')) { |
8990e307 |
137 | sv = sv_newmortal(); |
463ee0b2 |
138 | mg_copy((SV*)av, sv, 0, key); |
463ee0b2 |
139 | Sv = sv; |
140 | return &Sv; |
141 | } |
142 | } |
143 | |
a0d0e21e |
144 | if (key < 0) { |
145 | key += AvFILL(av) + 1; |
146 | if (key < 0) |
147 | return 0; |
148 | } |
149 | else if (key > AvFILL(av)) { |
150 | if (!lval) |
151 | return 0; |
152 | if (AvREALISH(av)) |
153 | sv = NEWSV(5,0); |
154 | else |
155 | sv = sv_newmortal(); |
156 | return av_store(av,key,sv); |
79072805 |
157 | } |
a0d0e21e |
158 | if (AvARRAY(av)[key] == &sv_undef) { |
4dbf4341 |
159 | emptyness: |
79072805 |
160 | if (lval) { |
161 | sv = NEWSV(6,0); |
463ee0b2 |
162 | return av_store(av,key,sv); |
79072805 |
163 | } |
164 | return 0; |
165 | } |
4dbf4341 |
166 | else if (AvREIFY(av) |
167 | && (!AvARRAY(av)[key] /* eg. @_ could have freed elts */ |
168 | || SvTYPE(AvARRAY(av)[key]) == SVTYPEMASK)) { |
169 | AvARRAY(av)[key] = &sv_undef; /* 1/2 reify */ |
170 | goto emptyness; |
171 | } |
463ee0b2 |
172 | return &AvARRAY(av)[key]; |
79072805 |
173 | } |
174 | |
175 | SV** |
463ee0b2 |
176 | av_store(av,key,val) |
177 | register AV *av; |
79072805 |
178 | I32 key; |
179 | SV *val; |
180 | { |
79072805 |
181 | SV** ary; |
182 | |
a0d0e21e |
183 | if (!av) |
184 | return 0; |
43fcc5d2 |
185 | if (!val) |
186 | val = &sv_undef; |
463ee0b2 |
187 | |
8990e307 |
188 | if (SvRMAGICAL(av)) { |
463ee0b2 |
189 | if (mg_find((SV*)av,'P')) { |
43fcc5d2 |
190 | if (val != &sv_undef) |
191 | mg_copy((SV*)av, val, 0, key); |
463ee0b2 |
192 | return 0; |
193 | } |
194 | } |
195 | |
a0d0e21e |
196 | if (key < 0) { |
197 | key += AvFILL(av) + 1; |
198 | if (key < 0) |
199 | return 0; |
79072805 |
200 | } |
43fcc5d2 |
201 | if (SvREADONLY(av) && key >= AvFILL(av)) |
202 | croak(no_modify); |
49beac48 |
203 | if (!AvREAL(av) && AvREIFY(av)) |
a0d0e21e |
204 | av_reify(av); |
29de640a |
205 | if (key > AvMAX(av)) |
206 | av_extend(av,key); |
463ee0b2 |
207 | ary = AvARRAY(av); |
a0d0e21e |
208 | if (AvFILL(av) < key) { |
209 | if (!AvREAL(av)) { |
7d55f622 |
210 | if (av == curstack && key > stack_sp - stack_base) |
a0d0e21e |
211 | stack_sp = stack_base + key; /* XPUSH in disguise */ |
212 | do |
213 | ary[++AvFILL(av)] = &sv_undef; |
214 | while (AvFILL(av) < key); |
79072805 |
215 | } |
a0d0e21e |
216 | AvFILL(av) = key; |
79072805 |
217 | } |
a0d0e21e |
218 | else if (AvREAL(av)) |
219 | SvREFCNT_dec(ary[key]); |
79072805 |
220 | ary[key] = val; |
8990e307 |
221 | if (SvSMAGICAL(av)) { |
a0d0e21e |
222 | if (val != &sv_undef) { |
223 | MAGIC* mg = SvMAGIC(av); |
224 | sv_magic(val, (SV*)av, toLOWER(mg->mg_type), 0, key); |
225 | } |
463ee0b2 |
226 | mg_set((SV*)av); |
227 | } |
79072805 |
228 | return &ary[key]; |
229 | } |
230 | |
231 | AV * |
232 | newAV() |
233 | { |
463ee0b2 |
234 | register AV *av; |
79072805 |
235 | |
a0d0e21e |
236 | av = (AV*)NEWSV(3,0); |
237 | sv_upgrade((SV *)av, SVt_PVAV); |
463ee0b2 |
238 | AvREAL_on(av); |
239 | AvALLOC(av) = 0; |
240 | SvPVX(av) = 0; |
241 | AvMAX(av) = AvFILL(av) = -1; |
242 | return av; |
79072805 |
243 | } |
244 | |
245 | AV * |
246 | av_make(size,strp) |
247 | register I32 size; |
248 | register SV **strp; |
249 | { |
463ee0b2 |
250 | register AV *av; |
79072805 |
251 | register I32 i; |
252 | register SV** ary; |
253 | |
a0d0e21e |
254 | av = (AV*)NEWSV(8,0); |
255 | sv_upgrade((SV *) av,SVt_PVAV); |
79072805 |
256 | New(4,ary,size+1,SV*); |
463ee0b2 |
257 | AvALLOC(av) = ary; |
a0d0e21e |
258 | AvFLAGS(av) = AVf_REAL; |
463ee0b2 |
259 | SvPVX(av) = (char*)ary; |
260 | AvFILL(av) = size - 1; |
261 | AvMAX(av) = size - 1; |
79072805 |
262 | for (i = 0; i < size; i++) { |
a0d0e21e |
263 | assert (*strp); |
264 | ary[i] = NEWSV(7,0); |
265 | sv_setsv(ary[i], *strp); |
79072805 |
266 | strp++; |
267 | } |
463ee0b2 |
268 | return av; |
79072805 |
269 | } |
270 | |
271 | AV * |
272 | av_fake(size,strp) |
273 | register I32 size; |
274 | register SV **strp; |
275 | { |
463ee0b2 |
276 | register AV *av; |
79072805 |
277 | register SV** ary; |
278 | |
a0d0e21e |
279 | av = (AV*)NEWSV(9,0); |
280 | sv_upgrade((SV *)av, SVt_PVAV); |
79072805 |
281 | New(4,ary,size+1,SV*); |
463ee0b2 |
282 | AvALLOC(av) = ary; |
79072805 |
283 | Copy(strp,ary,size,SV*); |
a0d0e21e |
284 | AvFLAGS(av) = AVf_REIFY; |
463ee0b2 |
285 | SvPVX(av) = (char*)ary; |
286 | AvFILL(av) = size - 1; |
287 | AvMAX(av) = size - 1; |
79072805 |
288 | while (size--) { |
a0d0e21e |
289 | assert (*strp); |
290 | SvTEMP_off(*strp); |
79072805 |
291 | strp++; |
292 | } |
463ee0b2 |
293 | return av; |
79072805 |
294 | } |
295 | |
296 | void |
463ee0b2 |
297 | av_clear(av) |
298 | register AV *av; |
79072805 |
299 | { |
300 | register I32 key; |
a0d0e21e |
301 | SV** ary; |
79072805 |
302 | |
7d55f622 |
303 | #ifdef DEBUGGING |
304 | if (SvREFCNT(av) <= 0) { |
305 | warn("Attempt to clear deleted array"); |
306 | } |
307 | #endif |
a0d0e21e |
308 | if (!av || AvMAX(av) < 0) |
79072805 |
309 | return; |
310 | /*SUPPRESS 560*/ |
a0d0e21e |
311 | |
312 | if (AvREAL(av)) { |
313 | ary = AvARRAY(av); |
314 | key = AvFILL(av) + 1; |
315 | while (key) { |
316 | SvREFCNT_dec(ary[--key]); |
317 | ary[key] = &sv_undef; |
318 | } |
319 | } |
463ee0b2 |
320 | if (key = AvARRAY(av) - AvALLOC(av)) { |
321 | AvMAX(av) += key; |
a0d0e21e |
322 | SvPVX(av) = (char*)AvALLOC(av); |
79072805 |
323 | } |
463ee0b2 |
324 | AvFILL(av) = -1; |
79072805 |
325 | } |
326 | |
327 | void |
463ee0b2 |
328 | av_undef(av) |
329 | register AV *av; |
79072805 |
330 | { |
331 | register I32 key; |
332 | |
463ee0b2 |
333 | if (!av) |
79072805 |
334 | return; |
335 | /*SUPPRESS 560*/ |
a0d0e21e |
336 | if (AvREAL(av)) { |
337 | key = AvFILL(av) + 1; |
338 | while (key) |
339 | SvREFCNT_dec(AvARRAY(av)[--key]); |
340 | } |
463ee0b2 |
341 | Safefree(AvALLOC(av)); |
342 | AvALLOC(av) = 0; |
343 | SvPVX(av) = 0; |
344 | AvMAX(av) = AvFILL(av) = -1; |
748a9306 |
345 | if (AvARYLEN(av)) { |
346 | SvREFCNT_dec(AvARYLEN(av)); |
347 | AvARYLEN(av) = 0; |
348 | } |
79072805 |
349 | } |
350 | |
a0d0e21e |
351 | void |
463ee0b2 |
352 | av_push(av,val) |
353 | register AV *av; |
79072805 |
354 | SV *val; |
355 | { |
a0d0e21e |
356 | if (!av) |
357 | return; |
358 | av_store(av,AvFILL(av)+1,val); |
79072805 |
359 | } |
360 | |
361 | SV * |
463ee0b2 |
362 | av_pop(av) |
363 | register AV *av; |
79072805 |
364 | { |
365 | SV *retval; |
366 | |
a0d0e21e |
367 | if (!av || AvFILL(av) < 0) |
368 | return &sv_undef; |
43fcc5d2 |
369 | if (SvREADONLY(av)) |
370 | croak(no_modify); |
463ee0b2 |
371 | retval = AvARRAY(av)[AvFILL(av)]; |
a0d0e21e |
372 | AvARRAY(av)[AvFILL(av)--] = &sv_undef; |
8990e307 |
373 | if (SvSMAGICAL(av)) |
463ee0b2 |
374 | mg_set((SV*)av); |
79072805 |
375 | return retval; |
376 | } |
377 | |
378 | void |
463ee0b2 |
379 | av_unshift(av,num) |
380 | register AV *av; |
79072805 |
381 | register I32 num; |
382 | { |
383 | register I32 i; |
384 | register SV **sstr,**dstr; |
385 | |
a0d0e21e |
386 | if (!av || num <= 0) |
79072805 |
387 | return; |
43fcc5d2 |
388 | if (SvREADONLY(av)) |
389 | croak(no_modify); |
49beac48 |
390 | if (!AvREAL(av) && AvREIFY(av)) |
391 | av_reify(av); |
a0d0e21e |
392 | i = AvARRAY(av) - AvALLOC(av); |
393 | if (i) { |
394 | if (i > num) |
395 | i = num; |
396 | num -= i; |
397 | |
398 | AvMAX(av) += i; |
399 | AvFILL(av) += i; |
400 | SvPVX(av) = (char*)(AvARRAY(av) - i); |
401 | } |
402 | if (num) { |
403 | av_extend(av,AvFILL(av)+num); |
404 | AvFILL(av) += num; |
463ee0b2 |
405 | dstr = AvARRAY(av) + AvFILL(av); |
79072805 |
406 | sstr = dstr - num; |
407 | #ifdef BUGGY_MSC5 |
408 | # pragma loop_opt(off) /* don't loop-optimize the following code */ |
409 | #endif /* BUGGY_MSC5 */ |
a0d0e21e |
410 | for (i = AvFILL(av) - num; i >= 0; --i) { |
79072805 |
411 | *dstr-- = *sstr--; |
412 | #ifdef BUGGY_MSC5 |
413 | # pragma loop_opt() /* loop-optimization back to command-line setting */ |
414 | #endif /* BUGGY_MSC5 */ |
415 | } |
a0d0e21e |
416 | while (num) |
417 | AvARRAY(av)[--num] = &sv_undef; |
79072805 |
418 | } |
419 | } |
420 | |
421 | SV * |
463ee0b2 |
422 | av_shift(av) |
423 | register AV *av; |
79072805 |
424 | { |
425 | SV *retval; |
426 | |
a0d0e21e |
427 | if (!av || AvFILL(av) < 0) |
428 | return &sv_undef; |
43fcc5d2 |
429 | if (SvREADONLY(av)) |
430 | croak(no_modify); |
463ee0b2 |
431 | retval = *AvARRAY(av); |
a0d0e21e |
432 | if (AvREAL(av)) |
433 | *AvARRAY(av) = &sv_undef; |
463ee0b2 |
434 | SvPVX(av) = (char*)(AvARRAY(av) + 1); |
435 | AvMAX(av)--; |
436 | AvFILL(av)--; |
8990e307 |
437 | if (SvSMAGICAL(av)) |
463ee0b2 |
438 | mg_set((SV*)av); |
79072805 |
439 | return retval; |
440 | } |
441 | |
442 | I32 |
463ee0b2 |
443 | av_len(av) |
444 | register AV *av; |
79072805 |
445 | { |
463ee0b2 |
446 | return AvFILL(av); |
79072805 |
447 | } |
448 | |
449 | void |
463ee0b2 |
450 | av_fill(av, fill) |
451 | register AV *av; |
79072805 |
452 | I32 fill; |
453 | { |
a0d0e21e |
454 | if (!av) |
455 | croak("panic: null array"); |
79072805 |
456 | if (fill < 0) |
457 | fill = -1; |
463ee0b2 |
458 | if (fill <= AvMAX(av)) { |
a0d0e21e |
459 | I32 key = AvFILL(av); |
460 | SV** ary = AvARRAY(av); |
461 | |
462 | if (AvREAL(av)) { |
463 | while (key > fill) { |
464 | SvREFCNT_dec(ary[key]); |
465 | ary[key--] = &sv_undef; |
466 | } |
467 | } |
468 | else { |
469 | while (key < fill) |
470 | ary[++key] = &sv_undef; |
471 | } |
472 | |
463ee0b2 |
473 | AvFILL(av) = fill; |
8990e307 |
474 | if (SvSMAGICAL(av)) |
463ee0b2 |
475 | mg_set((SV*)av); |
476 | } |
a0d0e21e |
477 | else |
478 | (void)av_store(av,fill,&sv_undef); |
79072805 |
479 | } |