Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* av.c |
79072805 | 2 | * |
a0d0e21e | 3 | * Copyright (c) 1991-1994, Larry Wall |
79072805 LW |
4 | * |
5 | * You may distribute under the terms of either the GNU General Public | |
6 | * License or the Artistic License, as specified in the README file. | |
7 | * | |
a0d0e21e LW |
8 | */ |
9 | ||
10 | /* | |
11 | * "...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 LW |
13 | */ |
14 | ||
15 | #include "EXTERN.h" | |
16 | #include "perl.h" | |
17 | ||
a0d0e21e LW |
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 | } | |
36 | AvREAL_on(av); | |
37 | } | |
38 | ||
39 | void | |
40 | av_extend(av,key) | |
41 | AV *av; | |
42 | I32 key; | |
43 | { | |
44 | if (key > AvMAX(av)) { | |
45 | SV** ary; | |
46 | I32 tmp; | |
47 | I32 newmax; | |
48 | ||
49 | if (AvALLOC(av) != AvARRAY(av)) { | |
50 | ary = AvALLOC(av) + AvFILL(av) + 1; | |
51 | tmp = AvARRAY(av) - AvALLOC(av); | |
52 | Move(AvARRAY(av), AvALLOC(av), AvFILL(av)+1, SV*); | |
53 | AvMAX(av) += tmp; | |
54 | SvPVX(av) = (char*)AvALLOC(av); | |
55 | if (AvREAL(av)) { | |
56 | while (tmp) | |
57 | ary[--tmp] = &sv_undef; | |
58 | } | |
59 | ||
60 | if (key > AvMAX(av) - 10) { | |
61 | newmax = key + AvMAX(av); | |
62 | goto resize; | |
63 | } | |
64 | } | |
65 | else { | |
66 | if (AvALLOC(av)) { | |
c07a80fd | 67 | #ifndef STRANGE_MALLOC |
4633a7c4 | 68 | U32 bytes; |
c07a80fd | 69 | #endif |
4633a7c4 | 70 | |
a0d0e21e LW |
71 | newmax = key + AvMAX(av) / 5; |
72 | resize: | |
4633a7c4 | 73 | #ifdef STRANGE_MALLOC |
a0d0e21e | 74 | Renew(AvALLOC(av),newmax+1, SV*); |
4633a7c4 LW |
75 | #else |
76 | bytes = (newmax + 1) * sizeof(SV*); | |
77 | #define MALLOC_OVERHEAD 16 | |
78 | tmp = MALLOC_OVERHEAD; | |
79 | while (tmp - MALLOC_OVERHEAD < bytes) | |
80 | tmp += tmp; | |
81 | tmp -= MALLOC_OVERHEAD; | |
82 | tmp /= sizeof(SV*); | |
83 | assert(tmp > newmax); | |
84 | newmax = tmp - 1; | |
85 | New(2,ary, newmax+1, SV*); | |
86 | Copy(AvALLOC(av), ary, AvMAX(av)+1, SV*); | |
c07a80fd | 87 | if (AvMAX(av) > 64 && !nice_chunk) { |
88 | nice_chunk = (char*)AvALLOC(av); | |
89 | nice_chunk_size = (AvMAX(av) + 1) * sizeof(SV*); | |
90 | } | |
4633a7c4 LW |
91 | else |
92 | Safefree(AvALLOC(av)); | |
93 | AvALLOC(av) = ary; | |
94 | #endif | |
a0d0e21e LW |
95 | ary = AvALLOC(av) + AvMAX(av) + 1; |
96 | tmp = newmax - AvMAX(av); | |
7d55f622 | 97 | if (av == curstack) { /* Oops, grew stack (via av_store()?) */ |
a0d0e21e LW |
98 | stack_sp = AvALLOC(av) + (stack_sp - stack_base); |
99 | stack_base = AvALLOC(av); | |
100 | stack_max = stack_base + newmax; | |
101 | } | |
102 | } | |
103 | else { | |
104 | newmax = key < 4 ? 4 : key; | |
105 | New(2,AvALLOC(av), newmax+1, SV*); | |
106 | ary = AvALLOC(av) + 1; | |
107 | tmp = newmax; | |
108 | AvALLOC(av)[0] = &sv_undef; /* For the stacks */ | |
109 | } | |
110 | if (AvREAL(av)) { | |
111 | while (tmp) | |
112 | ary[--tmp] = &sv_undef; | |
113 | } | |
114 | ||
115 | SvPVX(av) = (char*)AvALLOC(av); | |
116 | AvMAX(av) = newmax; | |
117 | } | |
118 | } | |
119 | } | |
120 | ||
79072805 | 121 | SV** |
463ee0b2 LW |
122 | av_fetch(av,key,lval) |
123 | register AV *av; | |
79072805 LW |
124 | I32 key; |
125 | I32 lval; | |
126 | { | |
127 | SV *sv; | |
128 | ||
a0d0e21e LW |
129 | if (!av) |
130 | return 0; | |
131 | ||
8990e307 | 132 | if (SvRMAGICAL(av)) { |
463ee0b2 | 133 | if (mg_find((SV*)av,'P')) { |
8990e307 | 134 | sv = sv_newmortal(); |
463ee0b2 | 135 | mg_copy((SV*)av, sv, 0, key); |
463ee0b2 LW |
136 | Sv = sv; |
137 | return &Sv; | |
138 | } | |
139 | } | |
140 | ||
a0d0e21e LW |
141 | if (key < 0) { |
142 | key += AvFILL(av) + 1; | |
143 | if (key < 0) | |
144 | return 0; | |
145 | } | |
146 | else if (key > AvFILL(av)) { | |
147 | if (!lval) | |
148 | return 0; | |
149 | if (AvREALISH(av)) | |
150 | sv = NEWSV(5,0); | |
151 | else | |
152 | sv = sv_newmortal(); | |
153 | return av_store(av,key,sv); | |
79072805 | 154 | } |
a0d0e21e | 155 | if (AvARRAY(av)[key] == &sv_undef) { |
4dbf4341 | 156 | emptyness: |
79072805 LW |
157 | if (lval) { |
158 | sv = NEWSV(6,0); | |
463ee0b2 | 159 | return av_store(av,key,sv); |
79072805 LW |
160 | } |
161 | return 0; | |
162 | } | |
4dbf4341 | 163 | else if (AvREIFY(av) |
164 | && (!AvARRAY(av)[key] /* eg. @_ could have freed elts */ | |
165 | || SvTYPE(AvARRAY(av)[key]) == SVTYPEMASK)) { | |
166 | AvARRAY(av)[key] = &sv_undef; /* 1/2 reify */ | |
167 | goto emptyness; | |
168 | } | |
463ee0b2 | 169 | return &AvARRAY(av)[key]; |
79072805 LW |
170 | } |
171 | ||
172 | SV** | |
463ee0b2 LW |
173 | av_store(av,key,val) |
174 | register AV *av; | |
79072805 LW |
175 | I32 key; |
176 | SV *val; | |
177 | { | |
79072805 LW |
178 | SV** ary; |
179 | ||
a0d0e21e LW |
180 | if (!av) |
181 | return 0; | |
43fcc5d2 CS |
182 | if (!val) |
183 | val = &sv_undef; | |
463ee0b2 | 184 | |
8990e307 | 185 | if (SvRMAGICAL(av)) { |
463ee0b2 | 186 | if (mg_find((SV*)av,'P')) { |
43fcc5d2 CS |
187 | if (val != &sv_undef) |
188 | mg_copy((SV*)av, val, 0, key); | |
463ee0b2 LW |
189 | return 0; |
190 | } | |
191 | } | |
192 | ||
a0d0e21e LW |
193 | if (key < 0) { |
194 | key += AvFILL(av) + 1; | |
195 | if (key < 0) | |
196 | return 0; | |
79072805 | 197 | } |
43fcc5d2 CS |
198 | if (SvREADONLY(av) && key >= AvFILL(av)) |
199 | croak(no_modify); | |
a0d0e21e LW |
200 | if (key > AvMAX(av)) |
201 | av_extend(av,key); | |
49beac48 | 202 | if (!AvREAL(av) && AvREIFY(av)) |
a0d0e21e | 203 | av_reify(av); |
463ee0b2 | 204 | ary = AvARRAY(av); |
a0d0e21e LW |
205 | if (AvFILL(av) < key) { |
206 | if (!AvREAL(av)) { | |
7d55f622 | 207 | if (av == curstack && key > stack_sp - stack_base) |
a0d0e21e LW |
208 | stack_sp = stack_base + key; /* XPUSH in disguise */ |
209 | do | |
210 | ary[++AvFILL(av)] = &sv_undef; | |
211 | while (AvFILL(av) < key); | |
79072805 | 212 | } |
a0d0e21e | 213 | AvFILL(av) = key; |
79072805 | 214 | } |
a0d0e21e LW |
215 | else if (AvREAL(av)) |
216 | SvREFCNT_dec(ary[key]); | |
79072805 | 217 | ary[key] = val; |
8990e307 | 218 | if (SvSMAGICAL(av)) { |
a0d0e21e LW |
219 | if (val != &sv_undef) { |
220 | MAGIC* mg = SvMAGIC(av); | |
221 | sv_magic(val, (SV*)av, toLOWER(mg->mg_type), 0, key); | |
222 | } | |
463ee0b2 LW |
223 | mg_set((SV*)av); |
224 | } | |
79072805 LW |
225 | return &ary[key]; |
226 | } | |
227 | ||
228 | AV * | |
229 | newAV() | |
230 | { | |
463ee0b2 | 231 | register AV *av; |
79072805 | 232 | |
a0d0e21e LW |
233 | av = (AV*)NEWSV(3,0); |
234 | sv_upgrade((SV *)av, SVt_PVAV); | |
463ee0b2 LW |
235 | AvREAL_on(av); |
236 | AvALLOC(av) = 0; | |
237 | SvPVX(av) = 0; | |
238 | AvMAX(av) = AvFILL(av) = -1; | |
239 | return av; | |
79072805 LW |
240 | } |
241 | ||
242 | AV * | |
243 | av_make(size,strp) | |
244 | register I32 size; | |
245 | register SV **strp; | |
246 | { | |
463ee0b2 | 247 | register AV *av; |
79072805 LW |
248 | register I32 i; |
249 | register SV** ary; | |
250 | ||
a0d0e21e LW |
251 | av = (AV*)NEWSV(8,0); |
252 | sv_upgrade((SV *) av,SVt_PVAV); | |
79072805 | 253 | New(4,ary,size+1,SV*); |
463ee0b2 | 254 | AvALLOC(av) = ary; |
a0d0e21e | 255 | AvFLAGS(av) = AVf_REAL; |
463ee0b2 LW |
256 | SvPVX(av) = (char*)ary; |
257 | AvFILL(av) = size - 1; | |
258 | AvMAX(av) = size - 1; | |
79072805 | 259 | for (i = 0; i < size; i++) { |
a0d0e21e LW |
260 | assert (*strp); |
261 | ary[i] = NEWSV(7,0); | |
262 | sv_setsv(ary[i], *strp); | |
79072805 LW |
263 | strp++; |
264 | } | |
463ee0b2 | 265 | return av; |
79072805 LW |
266 | } |
267 | ||
268 | AV * | |
269 | av_fake(size,strp) | |
270 | register I32 size; | |
271 | register SV **strp; | |
272 | { | |
463ee0b2 | 273 | register AV *av; |
79072805 LW |
274 | register SV** ary; |
275 | ||
a0d0e21e LW |
276 | av = (AV*)NEWSV(9,0); |
277 | sv_upgrade((SV *)av, SVt_PVAV); | |
79072805 | 278 | New(4,ary,size+1,SV*); |
463ee0b2 | 279 | AvALLOC(av) = ary; |
79072805 | 280 | Copy(strp,ary,size,SV*); |
a0d0e21e | 281 | AvFLAGS(av) = AVf_REIFY; |
463ee0b2 LW |
282 | SvPVX(av) = (char*)ary; |
283 | AvFILL(av) = size - 1; | |
284 | AvMAX(av) = size - 1; | |
79072805 | 285 | while (size--) { |
a0d0e21e LW |
286 | assert (*strp); |
287 | SvTEMP_off(*strp); | |
79072805 LW |
288 | strp++; |
289 | } | |
463ee0b2 | 290 | return av; |
79072805 LW |
291 | } |
292 | ||
293 | void | |
463ee0b2 LW |
294 | av_clear(av) |
295 | register AV *av; | |
79072805 LW |
296 | { |
297 | register I32 key; | |
a0d0e21e | 298 | SV** ary; |
79072805 | 299 | |
7d55f622 | 300 | #ifdef DEBUGGING |
301 | if (SvREFCNT(av) <= 0) { | |
302 | warn("Attempt to clear deleted array"); | |
303 | } | |
304 | #endif | |
a0d0e21e | 305 | if (!av || AvMAX(av) < 0) |
79072805 LW |
306 | return; |
307 | /*SUPPRESS 560*/ | |
a0d0e21e LW |
308 | |
309 | if (AvREAL(av)) { | |
310 | ary = AvARRAY(av); | |
311 | key = AvFILL(av) + 1; | |
312 | while (key) { | |
313 | SvREFCNT_dec(ary[--key]); | |
314 | ary[key] = &sv_undef; | |
315 | } | |
316 | } | |
463ee0b2 LW |
317 | if (key = AvARRAY(av) - AvALLOC(av)) { |
318 | AvMAX(av) += key; | |
a0d0e21e | 319 | SvPVX(av) = (char*)AvALLOC(av); |
79072805 | 320 | } |
463ee0b2 | 321 | AvFILL(av) = -1; |
79072805 LW |
322 | } |
323 | ||
324 | void | |
463ee0b2 LW |
325 | av_undef(av) |
326 | register AV *av; | |
79072805 LW |
327 | { |
328 | register I32 key; | |
329 | ||
463ee0b2 | 330 | if (!av) |
79072805 LW |
331 | return; |
332 | /*SUPPRESS 560*/ | |
a0d0e21e LW |
333 | if (AvREAL(av)) { |
334 | key = AvFILL(av) + 1; | |
335 | while (key) | |
336 | SvREFCNT_dec(AvARRAY(av)[--key]); | |
337 | } | |
463ee0b2 LW |
338 | Safefree(AvALLOC(av)); |
339 | AvALLOC(av) = 0; | |
340 | SvPVX(av) = 0; | |
341 | AvMAX(av) = AvFILL(av) = -1; | |
748a9306 LW |
342 | if (AvARYLEN(av)) { |
343 | SvREFCNT_dec(AvARYLEN(av)); | |
344 | AvARYLEN(av) = 0; | |
345 | } | |
79072805 LW |
346 | } |
347 | ||
a0d0e21e | 348 | void |
463ee0b2 LW |
349 | av_push(av,val) |
350 | register AV *av; | |
79072805 LW |
351 | SV *val; |
352 | { | |
a0d0e21e LW |
353 | if (!av) |
354 | return; | |
355 | av_store(av,AvFILL(av)+1,val); | |
79072805 LW |
356 | } |
357 | ||
358 | SV * | |
463ee0b2 LW |
359 | av_pop(av) |
360 | register AV *av; | |
79072805 LW |
361 | { |
362 | SV *retval; | |
363 | ||
a0d0e21e LW |
364 | if (!av || AvFILL(av) < 0) |
365 | return &sv_undef; | |
43fcc5d2 CS |
366 | if (SvREADONLY(av)) |
367 | croak(no_modify); | |
463ee0b2 | 368 | retval = AvARRAY(av)[AvFILL(av)]; |
a0d0e21e | 369 | AvARRAY(av)[AvFILL(av)--] = &sv_undef; |
8990e307 | 370 | if (SvSMAGICAL(av)) |
463ee0b2 | 371 | mg_set((SV*)av); |
79072805 LW |
372 | return retval; |
373 | } | |
374 | ||
375 | void | |
463ee0b2 LW |
376 | av_unshift(av,num) |
377 | register AV *av; | |
79072805 LW |
378 | register I32 num; |
379 | { | |
380 | register I32 i; | |
381 | register SV **sstr,**dstr; | |
382 | ||
a0d0e21e | 383 | if (!av || num <= 0) |
79072805 | 384 | return; |
43fcc5d2 CS |
385 | if (SvREADONLY(av)) |
386 | croak(no_modify); | |
49beac48 CS |
387 | if (!AvREAL(av) && AvREIFY(av)) |
388 | av_reify(av); | |
a0d0e21e LW |
389 | i = AvARRAY(av) - AvALLOC(av); |
390 | if (i) { | |
391 | if (i > num) | |
392 | i = num; | |
393 | num -= i; | |
394 | ||
395 | AvMAX(av) += i; | |
396 | AvFILL(av) += i; | |
397 | SvPVX(av) = (char*)(AvARRAY(av) - i); | |
398 | } | |
399 | if (num) { | |
400 | av_extend(av,AvFILL(av)+num); | |
401 | AvFILL(av) += num; | |
463ee0b2 | 402 | dstr = AvARRAY(av) + AvFILL(av); |
79072805 LW |
403 | sstr = dstr - num; |
404 | #ifdef BUGGY_MSC5 | |
405 | # pragma loop_opt(off) /* don't loop-optimize the following code */ | |
406 | #endif /* BUGGY_MSC5 */ | |
a0d0e21e | 407 | for (i = AvFILL(av) - num; i >= 0; --i) { |
79072805 LW |
408 | *dstr-- = *sstr--; |
409 | #ifdef BUGGY_MSC5 | |
410 | # pragma loop_opt() /* loop-optimization back to command-line setting */ | |
411 | #endif /* BUGGY_MSC5 */ | |
412 | } | |
a0d0e21e LW |
413 | while (num) |
414 | AvARRAY(av)[--num] = &sv_undef; | |
79072805 LW |
415 | } |
416 | } | |
417 | ||
418 | SV * | |
463ee0b2 LW |
419 | av_shift(av) |
420 | register AV *av; | |
79072805 LW |
421 | { |
422 | SV *retval; | |
423 | ||
a0d0e21e LW |
424 | if (!av || AvFILL(av) < 0) |
425 | return &sv_undef; | |
43fcc5d2 CS |
426 | if (SvREADONLY(av)) |
427 | croak(no_modify); | |
463ee0b2 | 428 | retval = *AvARRAY(av); |
a0d0e21e LW |
429 | if (AvREAL(av)) |
430 | *AvARRAY(av) = &sv_undef; | |
463ee0b2 LW |
431 | SvPVX(av) = (char*)(AvARRAY(av) + 1); |
432 | AvMAX(av)--; | |
433 | AvFILL(av)--; | |
8990e307 | 434 | if (SvSMAGICAL(av)) |
463ee0b2 | 435 | mg_set((SV*)av); |
79072805 LW |
436 | return retval; |
437 | } | |
438 | ||
439 | I32 | |
463ee0b2 LW |
440 | av_len(av) |
441 | register AV *av; | |
79072805 | 442 | { |
463ee0b2 | 443 | return AvFILL(av); |
79072805 LW |
444 | } |
445 | ||
446 | void | |
463ee0b2 LW |
447 | av_fill(av, fill) |
448 | register AV *av; | |
79072805 LW |
449 | I32 fill; |
450 | { | |
a0d0e21e LW |
451 | if (!av) |
452 | croak("panic: null array"); | |
79072805 LW |
453 | if (fill < 0) |
454 | fill = -1; | |
463ee0b2 | 455 | if (fill <= AvMAX(av)) { |
a0d0e21e LW |
456 | I32 key = AvFILL(av); |
457 | SV** ary = AvARRAY(av); | |
458 | ||
459 | if (AvREAL(av)) { | |
460 | while (key > fill) { | |
461 | SvREFCNT_dec(ary[key]); | |
462 | ary[key--] = &sv_undef; | |
463 | } | |
464 | } | |
465 | else { | |
466 | while (key < fill) | |
467 | ary[++key] = &sv_undef; | |
468 | } | |
469 | ||
463ee0b2 | 470 | AvFILL(av) = fill; |
8990e307 | 471 | if (SvSMAGICAL(av)) |
463ee0b2 LW |
472 | mg_set((SV*)av); |
473 | } | |
a0d0e21e LW |
474 | else |
475 | (void)av_store(av,fill,&sv_undef); | |
79072805 | 476 | } |