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); | |
202 | if (AvREIFY(av)) | |
203 | av_reify(av); | |
204 | ||
463ee0b2 | 205 | ary = AvARRAY(av); |
a0d0e21e LW |
206 | if (AvFILL(av) < key) { |
207 | if (!AvREAL(av)) { | |
7d55f622 | 208 | if (av == curstack && key > stack_sp - stack_base) |
a0d0e21e LW |
209 | stack_sp = stack_base + key; /* XPUSH in disguise */ |
210 | do | |
211 | ary[++AvFILL(av)] = &sv_undef; | |
212 | while (AvFILL(av) < key); | |
79072805 | 213 | } |
a0d0e21e | 214 | AvFILL(av) = key; |
79072805 | 215 | } |
a0d0e21e LW |
216 | else if (AvREAL(av)) |
217 | SvREFCNT_dec(ary[key]); | |
79072805 | 218 | ary[key] = val; |
8990e307 | 219 | if (SvSMAGICAL(av)) { |
a0d0e21e LW |
220 | if (val != &sv_undef) { |
221 | MAGIC* mg = SvMAGIC(av); | |
222 | sv_magic(val, (SV*)av, toLOWER(mg->mg_type), 0, key); | |
223 | } | |
463ee0b2 LW |
224 | mg_set((SV*)av); |
225 | } | |
79072805 LW |
226 | return &ary[key]; |
227 | } | |
228 | ||
229 | AV * | |
230 | newAV() | |
231 | { | |
463ee0b2 | 232 | register AV *av; |
79072805 | 233 | |
a0d0e21e LW |
234 | av = (AV*)NEWSV(3,0); |
235 | sv_upgrade((SV *)av, SVt_PVAV); | |
463ee0b2 LW |
236 | AvREAL_on(av); |
237 | AvALLOC(av) = 0; | |
238 | SvPVX(av) = 0; | |
239 | AvMAX(av) = AvFILL(av) = -1; | |
240 | return av; | |
79072805 LW |
241 | } |
242 | ||
243 | AV * | |
244 | av_make(size,strp) | |
245 | register I32 size; | |
246 | register SV **strp; | |
247 | { | |
463ee0b2 | 248 | register AV *av; |
79072805 LW |
249 | register I32 i; |
250 | register SV** ary; | |
251 | ||
a0d0e21e LW |
252 | av = (AV*)NEWSV(8,0); |
253 | sv_upgrade((SV *) av,SVt_PVAV); | |
79072805 | 254 | New(4,ary,size+1,SV*); |
463ee0b2 | 255 | AvALLOC(av) = ary; |
a0d0e21e | 256 | AvFLAGS(av) = AVf_REAL; |
463ee0b2 LW |
257 | SvPVX(av) = (char*)ary; |
258 | AvFILL(av) = size - 1; | |
259 | AvMAX(av) = size - 1; | |
79072805 | 260 | for (i = 0; i < size; i++) { |
a0d0e21e LW |
261 | assert (*strp); |
262 | ary[i] = NEWSV(7,0); | |
263 | sv_setsv(ary[i], *strp); | |
79072805 LW |
264 | strp++; |
265 | } | |
463ee0b2 | 266 | return av; |
79072805 LW |
267 | } |
268 | ||
269 | AV * | |
270 | av_fake(size,strp) | |
271 | register I32 size; | |
272 | register SV **strp; | |
273 | { | |
463ee0b2 | 274 | register AV *av; |
79072805 LW |
275 | register SV** ary; |
276 | ||
a0d0e21e LW |
277 | av = (AV*)NEWSV(9,0); |
278 | sv_upgrade((SV *)av, SVt_PVAV); | |
79072805 | 279 | New(4,ary,size+1,SV*); |
463ee0b2 | 280 | AvALLOC(av) = ary; |
79072805 | 281 | Copy(strp,ary,size,SV*); |
a0d0e21e | 282 | AvFLAGS(av) = AVf_REIFY; |
463ee0b2 LW |
283 | SvPVX(av) = (char*)ary; |
284 | AvFILL(av) = size - 1; | |
285 | AvMAX(av) = size - 1; | |
79072805 | 286 | while (size--) { |
a0d0e21e LW |
287 | assert (*strp); |
288 | SvTEMP_off(*strp); | |
79072805 LW |
289 | strp++; |
290 | } | |
463ee0b2 | 291 | return av; |
79072805 LW |
292 | } |
293 | ||
294 | void | |
463ee0b2 LW |
295 | av_clear(av) |
296 | register AV *av; | |
79072805 LW |
297 | { |
298 | register I32 key; | |
a0d0e21e | 299 | SV** ary; |
79072805 | 300 | |
7d55f622 | 301 | #ifdef DEBUGGING |
302 | if (SvREFCNT(av) <= 0) { | |
303 | warn("Attempt to clear deleted array"); | |
304 | } | |
305 | #endif | |
a0d0e21e | 306 | if (!av || AvMAX(av) < 0) |
79072805 LW |
307 | return; |
308 | /*SUPPRESS 560*/ | |
a0d0e21e LW |
309 | |
310 | if (AvREAL(av)) { | |
311 | ary = AvARRAY(av); | |
312 | key = AvFILL(av) + 1; | |
313 | while (key) { | |
314 | SvREFCNT_dec(ary[--key]); | |
315 | ary[key] = &sv_undef; | |
316 | } | |
317 | } | |
463ee0b2 LW |
318 | if (key = AvARRAY(av) - AvALLOC(av)) { |
319 | AvMAX(av) += key; | |
a0d0e21e | 320 | SvPVX(av) = (char*)AvALLOC(av); |
79072805 | 321 | } |
463ee0b2 | 322 | AvFILL(av) = -1; |
79072805 LW |
323 | } |
324 | ||
325 | void | |
463ee0b2 LW |
326 | av_undef(av) |
327 | register AV *av; | |
79072805 LW |
328 | { |
329 | register I32 key; | |
330 | ||
463ee0b2 | 331 | if (!av) |
79072805 LW |
332 | return; |
333 | /*SUPPRESS 560*/ | |
a0d0e21e LW |
334 | if (AvREAL(av)) { |
335 | key = AvFILL(av) + 1; | |
336 | while (key) | |
337 | SvREFCNT_dec(AvARRAY(av)[--key]); | |
338 | } | |
463ee0b2 LW |
339 | Safefree(AvALLOC(av)); |
340 | AvALLOC(av) = 0; | |
341 | SvPVX(av) = 0; | |
342 | AvMAX(av) = AvFILL(av) = -1; | |
748a9306 LW |
343 | if (AvARYLEN(av)) { |
344 | SvREFCNT_dec(AvARYLEN(av)); | |
345 | AvARYLEN(av) = 0; | |
346 | } | |
79072805 LW |
347 | } |
348 | ||
a0d0e21e | 349 | void |
463ee0b2 LW |
350 | av_push(av,val) |
351 | register AV *av; | |
79072805 LW |
352 | SV *val; |
353 | { | |
a0d0e21e LW |
354 | if (!av) |
355 | return; | |
356 | av_store(av,AvFILL(av)+1,val); | |
79072805 LW |
357 | } |
358 | ||
359 | SV * | |
463ee0b2 LW |
360 | av_pop(av) |
361 | register AV *av; | |
79072805 LW |
362 | { |
363 | SV *retval; | |
364 | ||
a0d0e21e LW |
365 | if (!av || AvFILL(av) < 0) |
366 | return &sv_undef; | |
43fcc5d2 CS |
367 | if (SvREADONLY(av)) |
368 | croak(no_modify); | |
463ee0b2 | 369 | retval = AvARRAY(av)[AvFILL(av)]; |
a0d0e21e | 370 | AvARRAY(av)[AvFILL(av)--] = &sv_undef; |
8990e307 | 371 | if (SvSMAGICAL(av)) |
463ee0b2 | 372 | mg_set((SV*)av); |
79072805 LW |
373 | return retval; |
374 | } | |
375 | ||
376 | void | |
463ee0b2 LW |
377 | av_unshift(av,num) |
378 | register AV *av; | |
79072805 LW |
379 | register I32 num; |
380 | { | |
381 | register I32 i; | |
382 | register SV **sstr,**dstr; | |
383 | ||
a0d0e21e | 384 | if (!av || num <= 0) |
79072805 | 385 | return; |
43fcc5d2 CS |
386 | if (SvREADONLY(av)) |
387 | croak(no_modify); | |
a0d0e21e LW |
388 | if (!AvREAL(av)) { |
389 | if (AvREIFY(av)) | |
390 | av_reify(av); | |
391 | else | |
392 | croak("Can't unshift"); | |
79072805 | 393 | } |
a0d0e21e LW |
394 | i = AvARRAY(av) - AvALLOC(av); |
395 | if (i) { | |
396 | if (i > num) | |
397 | i = num; | |
398 | num -= i; | |
399 | ||
400 | AvMAX(av) += i; | |
401 | AvFILL(av) += i; | |
402 | SvPVX(av) = (char*)(AvARRAY(av) - i); | |
403 | } | |
404 | if (num) { | |
405 | av_extend(av,AvFILL(av)+num); | |
406 | AvFILL(av) += num; | |
463ee0b2 | 407 | dstr = AvARRAY(av) + AvFILL(av); |
79072805 LW |
408 | sstr = dstr - num; |
409 | #ifdef BUGGY_MSC5 | |
410 | # pragma loop_opt(off) /* don't loop-optimize the following code */ | |
411 | #endif /* BUGGY_MSC5 */ | |
a0d0e21e | 412 | for (i = AvFILL(av) - num; i >= 0; --i) { |
79072805 LW |
413 | *dstr-- = *sstr--; |
414 | #ifdef BUGGY_MSC5 | |
415 | # pragma loop_opt() /* loop-optimization back to command-line setting */ | |
416 | #endif /* BUGGY_MSC5 */ | |
417 | } | |
a0d0e21e LW |
418 | while (num) |
419 | AvARRAY(av)[--num] = &sv_undef; | |
79072805 LW |
420 | } |
421 | } | |
422 | ||
423 | SV * | |
463ee0b2 LW |
424 | av_shift(av) |
425 | register AV *av; | |
79072805 LW |
426 | { |
427 | SV *retval; | |
428 | ||
a0d0e21e LW |
429 | if (!av || AvFILL(av) < 0) |
430 | return &sv_undef; | |
43fcc5d2 CS |
431 | if (SvREADONLY(av)) |
432 | croak(no_modify); | |
463ee0b2 | 433 | retval = *AvARRAY(av); |
a0d0e21e LW |
434 | if (AvREAL(av)) |
435 | *AvARRAY(av) = &sv_undef; | |
463ee0b2 LW |
436 | SvPVX(av) = (char*)(AvARRAY(av) + 1); |
437 | AvMAX(av)--; | |
438 | AvFILL(av)--; | |
8990e307 | 439 | if (SvSMAGICAL(av)) |
463ee0b2 | 440 | mg_set((SV*)av); |
79072805 LW |
441 | return retval; |
442 | } | |
443 | ||
444 | I32 | |
463ee0b2 LW |
445 | av_len(av) |
446 | register AV *av; | |
79072805 | 447 | { |
463ee0b2 | 448 | return AvFILL(av); |
79072805 LW |
449 | } |
450 | ||
451 | void | |
463ee0b2 LW |
452 | av_fill(av, fill) |
453 | register AV *av; | |
79072805 LW |
454 | I32 fill; |
455 | { | |
a0d0e21e LW |
456 | if (!av) |
457 | croak("panic: null array"); | |
79072805 LW |
458 | if (fill < 0) |
459 | fill = -1; | |
463ee0b2 | 460 | if (fill <= AvMAX(av)) { |
a0d0e21e LW |
461 | I32 key = AvFILL(av); |
462 | SV** ary = AvARRAY(av); | |
463 | ||
464 | if (AvREAL(av)) { | |
465 | while (key > fill) { | |
466 | SvREFCNT_dec(ary[key]); | |
467 | ary[key--] = &sv_undef; | |
468 | } | |
469 | } | |
470 | else { | |
471 | while (key < fill) | |
472 | ary[++key] = &sv_undef; | |
473 | } | |
474 | ||
463ee0b2 | 475 | AvFILL(av) = fill; |
8990e307 | 476 | if (SvSMAGICAL(av)) |
463ee0b2 LW |
477 | mg_set((SV*)av); |
478 | } | |
a0d0e21e LW |
479 | else |
480 | (void)av_store(av,fill,&sv_undef); | |
79072805 | 481 | } |