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1 | /* av.c |
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2 | * |
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3 | * Copyright (c) 1991-1994, 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 | * |
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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 |
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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); |
11343788 |
33 | if (sv != &sv_undef) { |
34 | dTHR; |
a0d0e21e |
35 | (void)SvREFCNT_inc(sv); |
11343788 |
36 | } |
a0d0e21e |
37 | } |
38 | AvREAL_on(av); |
39 | } |
40 | |
41 | void |
42 | av_extend(av,key) |
43 | AV *av; |
44 | I32 key; |
45 | { |
11343788 |
46 | dTHR; /* only necessary if we have to extend stack */ |
a0d0e21e |
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 | |
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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); |
100 | if (av == stack) { /* Oops, grew stack (via av_store()?) */ |
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** |
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125 | av_fetch(av,key,lval) |
126 | register AV *av; |
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127 | I32 key; |
128 | I32 lval; |
129 | { |
130 | SV *sv; |
131 | |
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132 | if (!av) |
133 | return 0; |
134 | |
8990e307 |
135 | if (SvRMAGICAL(av)) { |
463ee0b2 |
136 | if (mg_find((SV*)av,'P')) { |
11343788 |
137 | dTHR; |
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138 | sv = sv_newmortal(); |
463ee0b2 |
139 | mg_copy((SV*)av, sv, 0, key); |
463ee0b2 |
140 | Sv = sv; |
141 | return &Sv; |
142 | } |
143 | } |
144 | |
a0d0e21e |
145 | if (key < 0) { |
146 | key += AvFILL(av) + 1; |
147 | if (key < 0) |
148 | return 0; |
149 | } |
150 | else if (key > AvFILL(av)) { |
151 | if (!lval) |
152 | return 0; |
153 | if (AvREALISH(av)) |
154 | sv = NEWSV(5,0); |
155 | else |
156 | sv = sv_newmortal(); |
157 | return av_store(av,key,sv); |
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158 | } |
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159 | if (AvARRAY(av)[key] == &sv_undef) { |
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160 | if (lval) { |
161 | sv = NEWSV(6,0); |
463ee0b2 |
162 | return av_store(av,key,sv); |
79072805 |
163 | } |
164 | return 0; |
165 | } |
463ee0b2 |
166 | return &AvARRAY(av)[key]; |
79072805 |
167 | } |
168 | |
169 | SV** |
463ee0b2 |
170 | av_store(av,key,val) |
171 | register AV *av; |
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172 | I32 key; |
173 | SV *val; |
174 | { |
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175 | SV** ary; |
176 | |
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177 | if (!av) |
178 | return 0; |
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179 | |
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180 | if (SvRMAGICAL(av)) { |
463ee0b2 |
181 | if (mg_find((SV*)av,'P')) { |
182 | mg_copy((SV*)av, val, 0, key); |
183 | return 0; |
184 | } |
185 | } |
186 | |
a0d0e21e |
187 | if (key < 0) { |
188 | key += AvFILL(av) + 1; |
189 | if (key < 0) |
190 | return 0; |
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191 | } |
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192 | if (!val) |
193 | val = &sv_undef; |
194 | |
195 | if (key > AvMAX(av)) |
196 | av_extend(av,key); |
197 | if (AvREIFY(av)) |
198 | av_reify(av); |
199 | |
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200 | ary = AvARRAY(av); |
a0d0e21e |
201 | if (AvFILL(av) < key) { |
202 | if (!AvREAL(av)) { |
11343788 |
203 | dTHR; |
a0d0e21e |
204 | if (av == stack && key > stack_sp - stack_base) |
205 | stack_sp = stack_base + key; /* XPUSH in disguise */ |
206 | do |
207 | ary[++AvFILL(av)] = &sv_undef; |
208 | while (AvFILL(av) < key); |
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209 | } |
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210 | AvFILL(av) = key; |
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211 | } |
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212 | else if (AvREAL(av)) |
213 | SvREFCNT_dec(ary[key]); |
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214 | ary[key] = val; |
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215 | if (SvSMAGICAL(av)) { |
a0d0e21e |
216 | if (val != &sv_undef) { |
217 | MAGIC* mg = SvMAGIC(av); |
218 | sv_magic(val, (SV*)av, toLOWER(mg->mg_type), 0, key); |
219 | } |
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220 | mg_set((SV*)av); |
221 | } |
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222 | return &ary[key]; |
223 | } |
224 | |
225 | AV * |
226 | newAV() |
227 | { |
463ee0b2 |
228 | register AV *av; |
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229 | |
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230 | av = (AV*)NEWSV(3,0); |
231 | sv_upgrade((SV *)av, SVt_PVAV); |
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232 | AvREAL_on(av); |
233 | AvALLOC(av) = 0; |
234 | SvPVX(av) = 0; |
235 | AvMAX(av) = AvFILL(av) = -1; |
236 | return av; |
79072805 |
237 | } |
238 | |
239 | AV * |
240 | av_make(size,strp) |
241 | register I32 size; |
242 | register SV **strp; |
243 | { |
463ee0b2 |
244 | register AV *av; |
79072805 |
245 | register I32 i; |
246 | register SV** ary; |
247 | |
a0d0e21e |
248 | av = (AV*)NEWSV(8,0); |
249 | sv_upgrade((SV *) av,SVt_PVAV); |
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250 | New(4,ary,size+1,SV*); |
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251 | AvALLOC(av) = ary; |
a0d0e21e |
252 | AvFLAGS(av) = AVf_REAL; |
463ee0b2 |
253 | SvPVX(av) = (char*)ary; |
254 | AvFILL(av) = size - 1; |
255 | AvMAX(av) = size - 1; |
79072805 |
256 | for (i = 0; i < size; i++) { |
a0d0e21e |
257 | assert (*strp); |
258 | ary[i] = NEWSV(7,0); |
259 | sv_setsv(ary[i], *strp); |
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260 | strp++; |
261 | } |
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262 | return av; |
79072805 |
263 | } |
264 | |
265 | AV * |
266 | av_fake(size,strp) |
267 | register I32 size; |
268 | register SV **strp; |
269 | { |
463ee0b2 |
270 | register AV *av; |
79072805 |
271 | register SV** ary; |
272 | |
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273 | av = (AV*)NEWSV(9,0); |
274 | sv_upgrade((SV *)av, SVt_PVAV); |
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275 | New(4,ary,size+1,SV*); |
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276 | AvALLOC(av) = ary; |
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277 | Copy(strp,ary,size,SV*); |
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278 | AvFLAGS(av) = AVf_REIFY; |
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279 | SvPVX(av) = (char*)ary; |
280 | AvFILL(av) = size - 1; |
281 | AvMAX(av) = size - 1; |
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282 | while (size--) { |
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283 | assert (*strp); |
284 | SvTEMP_off(*strp); |
79072805 |
285 | strp++; |
286 | } |
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287 | return av; |
79072805 |
288 | } |
289 | |
290 | void |
463ee0b2 |
291 | av_clear(av) |
292 | register AV *av; |
79072805 |
293 | { |
294 | register I32 key; |
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295 | SV** ary; |
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296 | |
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297 | if (!av || AvMAX(av) < 0) |
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298 | return; |
299 | /*SUPPRESS 560*/ |
a0d0e21e |
300 | |
301 | if (AvREAL(av)) { |
302 | ary = AvARRAY(av); |
303 | key = AvFILL(av) + 1; |
304 | while (key) { |
305 | SvREFCNT_dec(ary[--key]); |
306 | ary[key] = &sv_undef; |
307 | } |
308 | } |
463ee0b2 |
309 | if (key = AvARRAY(av) - AvALLOC(av)) { |
310 | AvMAX(av) += key; |
a0d0e21e |
311 | SvPVX(av) = (char*)AvALLOC(av); |
79072805 |
312 | } |
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313 | AvFILL(av) = -1; |
79072805 |
314 | } |
315 | |
316 | void |
463ee0b2 |
317 | av_undef(av) |
318 | register AV *av; |
79072805 |
319 | { |
320 | register I32 key; |
321 | |
463ee0b2 |
322 | if (!av) |
79072805 |
323 | return; |
324 | /*SUPPRESS 560*/ |
a0d0e21e |
325 | if (AvREAL(av)) { |
326 | key = AvFILL(av) + 1; |
327 | while (key) |
328 | SvREFCNT_dec(AvARRAY(av)[--key]); |
329 | } |
463ee0b2 |
330 | if (key = AvARRAY(av) - AvALLOC(av)) { |
331 | AvMAX(av) += key; |
a0d0e21e |
332 | SvPVX(av) = (char*)AvALLOC(av); |
79072805 |
333 | } |
463ee0b2 |
334 | Safefree(AvALLOC(av)); |
335 | AvALLOC(av) = 0; |
336 | SvPVX(av) = 0; |
337 | AvMAX(av) = AvFILL(av) = -1; |
748a9306 |
338 | if (AvARYLEN(av)) { |
339 | SvREFCNT_dec(AvARYLEN(av)); |
340 | AvARYLEN(av) = 0; |
341 | } |
79072805 |
342 | } |
343 | |
a0d0e21e |
344 | void |
463ee0b2 |
345 | av_push(av,val) |
346 | register AV *av; |
79072805 |
347 | SV *val; |
348 | { |
a0d0e21e |
349 | if (!av) |
350 | return; |
351 | av_store(av,AvFILL(av)+1,val); |
79072805 |
352 | } |
353 | |
354 | SV * |
463ee0b2 |
355 | av_pop(av) |
356 | register AV *av; |
79072805 |
357 | { |
358 | SV *retval; |
359 | |
a0d0e21e |
360 | if (!av || AvFILL(av) < 0) |
361 | return &sv_undef; |
463ee0b2 |
362 | retval = AvARRAY(av)[AvFILL(av)]; |
a0d0e21e |
363 | AvARRAY(av)[AvFILL(av)--] = &sv_undef; |
8990e307 |
364 | if (SvSMAGICAL(av)) |
463ee0b2 |
365 | mg_set((SV*)av); |
79072805 |
366 | return retval; |
367 | } |
368 | |
369 | void |
463ee0b2 |
370 | av_unshift(av,num) |
371 | register AV *av; |
79072805 |
372 | register I32 num; |
373 | { |
374 | register I32 i; |
375 | register SV **sstr,**dstr; |
376 | |
a0d0e21e |
377 | if (!av || num <= 0) |
79072805 |
378 | return; |
a0d0e21e |
379 | if (!AvREAL(av)) { |
380 | if (AvREIFY(av)) |
381 | av_reify(av); |
382 | else |
383 | croak("Can't unshift"); |
79072805 |
384 | } |
a0d0e21e |
385 | i = AvARRAY(av) - AvALLOC(av); |
386 | if (i) { |
387 | if (i > num) |
388 | i = num; |
389 | num -= i; |
390 | |
391 | AvMAX(av) += i; |
392 | AvFILL(av) += i; |
393 | SvPVX(av) = (char*)(AvARRAY(av) - i); |
394 | } |
395 | if (num) { |
396 | av_extend(av,AvFILL(av)+num); |
397 | AvFILL(av) += num; |
463ee0b2 |
398 | dstr = AvARRAY(av) + AvFILL(av); |
79072805 |
399 | sstr = dstr - num; |
400 | #ifdef BUGGY_MSC5 |
401 | # pragma loop_opt(off) /* don't loop-optimize the following code */ |
402 | #endif /* BUGGY_MSC5 */ |
a0d0e21e |
403 | for (i = AvFILL(av) - num; i >= 0; --i) { |
79072805 |
404 | *dstr-- = *sstr--; |
405 | #ifdef BUGGY_MSC5 |
406 | # pragma loop_opt() /* loop-optimization back to command-line setting */ |
407 | #endif /* BUGGY_MSC5 */ |
408 | } |
a0d0e21e |
409 | while (num) |
410 | AvARRAY(av)[--num] = &sv_undef; |
79072805 |
411 | } |
412 | } |
413 | |
414 | SV * |
463ee0b2 |
415 | av_shift(av) |
416 | register AV *av; |
79072805 |
417 | { |
418 | SV *retval; |
419 | |
a0d0e21e |
420 | if (!av || AvFILL(av) < 0) |
421 | return &sv_undef; |
463ee0b2 |
422 | retval = *AvARRAY(av); |
a0d0e21e |
423 | if (AvREAL(av)) |
424 | *AvARRAY(av) = &sv_undef; |
463ee0b2 |
425 | SvPVX(av) = (char*)(AvARRAY(av) + 1); |
426 | AvMAX(av)--; |
427 | AvFILL(av)--; |
8990e307 |
428 | if (SvSMAGICAL(av)) |
463ee0b2 |
429 | mg_set((SV*)av); |
79072805 |
430 | return retval; |
431 | } |
432 | |
433 | I32 |
463ee0b2 |
434 | av_len(av) |
435 | register AV *av; |
79072805 |
436 | { |
463ee0b2 |
437 | return AvFILL(av); |
79072805 |
438 | } |
439 | |
440 | void |
463ee0b2 |
441 | av_fill(av, fill) |
442 | register AV *av; |
79072805 |
443 | I32 fill; |
444 | { |
a0d0e21e |
445 | if (!av) |
446 | croak("panic: null array"); |
79072805 |
447 | if (fill < 0) |
448 | fill = -1; |
463ee0b2 |
449 | if (fill <= AvMAX(av)) { |
a0d0e21e |
450 | I32 key = AvFILL(av); |
451 | SV** ary = AvARRAY(av); |
452 | |
453 | if (AvREAL(av)) { |
454 | while (key > fill) { |
455 | SvREFCNT_dec(ary[key]); |
456 | ary[key--] = &sv_undef; |
457 | } |
458 | } |
459 | else { |
460 | while (key < fill) |
461 | ary[++key] = &sv_undef; |
462 | } |
463 | |
463ee0b2 |
464 | AvFILL(av) = fill; |
8990e307 |
465 | if (SvSMAGICAL(av)) |
463ee0b2 |
466 | mg_set((SV*)av); |
467 | } |
a0d0e21e |
468 | else |
469 | (void)av_store(av,fill,&sv_undef); |
79072805 |
470 | } |