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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 | |
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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 |
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70 | |
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71 | newmax = key + AvMAX(av) / 5; |
72 | resize: |
4633a7c4 |
73 | #ifdef STRANGE_MALLOC |
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74 | Renew(AvALLOC(av),newmax+1, SV*); |
4633a7c4 |
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 |
91 | else |
92 | Safefree(AvALLOC(av)); |
93 | AvALLOC(av) = ary; |
94 | #endif |
a0d0e21e |
95 | ary = AvALLOC(av) + AvMAX(av) + 1; |
96 | tmp = newmax - AvMAX(av); |
97 | if (av == stack) { /* Oops, grew stack (via av_store()?) */ |
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 | |
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121 | SV** |
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122 | av_fetch(av,key,lval) |
123 | register AV *av; |
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124 | I32 key; |
125 | I32 lval; |
126 | { |
127 | SV *sv; |
128 | |
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129 | if (!av) |
130 | return 0; |
131 | |
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132 | if (SvRMAGICAL(av)) { |
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133 | if (mg_find((SV*)av,'P')) { |
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134 | sv = sv_newmortal(); |
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135 | mg_copy((SV*)av, sv, 0, key); |
463ee0b2 |
136 | Sv = sv; |
137 | return &Sv; |
138 | } |
139 | } |
140 | |
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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); |
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154 | } |
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155 | if (AvARRAY(av)[key] == &sv_undef) { |
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156 | if (lval) { |
157 | sv = NEWSV(6,0); |
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158 | return av_store(av,key,sv); |
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159 | } |
160 | return 0; |
161 | } |
463ee0b2 |
162 | return &AvARRAY(av)[key]; |
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163 | } |
164 | |
165 | SV** |
463ee0b2 |
166 | av_store(av,key,val) |
167 | register AV *av; |
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168 | I32 key; |
169 | SV *val; |
170 | { |
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171 | SV** ary; |
172 | |
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173 | if (!av) |
174 | return 0; |
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175 | |
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176 | if (SvRMAGICAL(av)) { |
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177 | if (mg_find((SV*)av,'P')) { |
178 | mg_copy((SV*)av, val, 0, key); |
179 | return 0; |
180 | } |
181 | } |
182 | |
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183 | if (key < 0) { |
184 | key += AvFILL(av) + 1; |
185 | if (key < 0) |
186 | return 0; |
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187 | } |
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188 | if (!val) |
189 | val = &sv_undef; |
190 | |
191 | if (key > AvMAX(av)) |
192 | av_extend(av,key); |
193 | if (AvREIFY(av)) |
194 | av_reify(av); |
195 | |
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196 | ary = AvARRAY(av); |
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197 | if (AvFILL(av) < key) { |
198 | if (!AvREAL(av)) { |
199 | if (av == stack && key > stack_sp - stack_base) |
200 | stack_sp = stack_base + key; /* XPUSH in disguise */ |
201 | do |
202 | ary[++AvFILL(av)] = &sv_undef; |
203 | while (AvFILL(av) < key); |
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204 | } |
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205 | AvFILL(av) = key; |
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206 | } |
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207 | else if (AvREAL(av)) |
208 | SvREFCNT_dec(ary[key]); |
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209 | ary[key] = val; |
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210 | if (SvSMAGICAL(av)) { |
a0d0e21e |
211 | if (val != &sv_undef) { |
212 | MAGIC* mg = SvMAGIC(av); |
213 | sv_magic(val, (SV*)av, toLOWER(mg->mg_type), 0, key); |
214 | } |
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215 | mg_set((SV*)av); |
216 | } |
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217 | return &ary[key]; |
218 | } |
219 | |
220 | AV * |
221 | newAV() |
222 | { |
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223 | register AV *av; |
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224 | |
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225 | av = (AV*)NEWSV(3,0); |
226 | sv_upgrade((SV *)av, SVt_PVAV); |
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227 | AvREAL_on(av); |
228 | AvALLOC(av) = 0; |
229 | SvPVX(av) = 0; |
230 | AvMAX(av) = AvFILL(av) = -1; |
231 | return av; |
79072805 |
232 | } |
233 | |
234 | AV * |
235 | av_make(size,strp) |
236 | register I32 size; |
237 | register SV **strp; |
238 | { |
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239 | register AV *av; |
79072805 |
240 | register I32 i; |
241 | register SV** ary; |
242 | |
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243 | av = (AV*)NEWSV(8,0); |
244 | sv_upgrade((SV *) av,SVt_PVAV); |
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245 | New(4,ary,size+1,SV*); |
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246 | AvALLOC(av) = ary; |
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247 | AvFLAGS(av) = AVf_REAL; |
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248 | SvPVX(av) = (char*)ary; |
249 | AvFILL(av) = size - 1; |
250 | AvMAX(av) = size - 1; |
79072805 |
251 | for (i = 0; i < size; i++) { |
a0d0e21e |
252 | assert (*strp); |
253 | ary[i] = NEWSV(7,0); |
254 | sv_setsv(ary[i], *strp); |
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255 | strp++; |
256 | } |
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257 | return av; |
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258 | } |
259 | |
260 | AV * |
261 | av_fake(size,strp) |
262 | register I32 size; |
263 | register SV **strp; |
264 | { |
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265 | register AV *av; |
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266 | register SV** ary; |
267 | |
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268 | av = (AV*)NEWSV(9,0); |
269 | sv_upgrade((SV *)av, SVt_PVAV); |
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270 | New(4,ary,size+1,SV*); |
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271 | AvALLOC(av) = ary; |
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272 | Copy(strp,ary,size,SV*); |
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273 | AvFLAGS(av) = AVf_REIFY; |
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274 | SvPVX(av) = (char*)ary; |
275 | AvFILL(av) = size - 1; |
276 | AvMAX(av) = size - 1; |
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277 | while (size--) { |
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278 | assert (*strp); |
279 | SvTEMP_off(*strp); |
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280 | strp++; |
281 | } |
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282 | return av; |
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283 | } |
284 | |
285 | void |
463ee0b2 |
286 | av_clear(av) |
287 | register AV *av; |
79072805 |
288 | { |
289 | register I32 key; |
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290 | SV** ary; |
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291 | |
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292 | if (!av || AvMAX(av) < 0) |
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293 | return; |
294 | /*SUPPRESS 560*/ |
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295 | |
296 | if (AvREAL(av)) { |
297 | ary = AvARRAY(av); |
298 | key = AvFILL(av) + 1; |
299 | while (key) { |
300 | SvREFCNT_dec(ary[--key]); |
301 | ary[key] = &sv_undef; |
302 | } |
303 | } |
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304 | if (key = AvARRAY(av) - AvALLOC(av)) { |
305 | AvMAX(av) += key; |
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306 | SvPVX(av) = (char*)AvALLOC(av); |
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307 | } |
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308 | AvFILL(av) = -1; |
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309 | } |
310 | |
311 | void |
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312 | av_undef(av) |
313 | register AV *av; |
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314 | { |
315 | register I32 key; |
316 | |
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317 | if (!av) |
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318 | return; |
319 | /*SUPPRESS 560*/ |
a0d0e21e |
320 | if (AvREAL(av)) { |
321 | key = AvFILL(av) + 1; |
322 | while (key) |
323 | SvREFCNT_dec(AvARRAY(av)[--key]); |
324 | } |
463ee0b2 |
325 | if (key = AvARRAY(av) - AvALLOC(av)) { |
326 | AvMAX(av) += key; |
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327 | SvPVX(av) = (char*)AvALLOC(av); |
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328 | } |
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329 | Safefree(AvALLOC(av)); |
330 | AvALLOC(av) = 0; |
331 | SvPVX(av) = 0; |
332 | AvMAX(av) = AvFILL(av) = -1; |
748a9306 |
333 | if (AvARYLEN(av)) { |
334 | SvREFCNT_dec(AvARYLEN(av)); |
335 | AvARYLEN(av) = 0; |
336 | } |
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337 | } |
338 | |
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339 | void |
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340 | av_push(av,val) |
341 | register AV *av; |
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342 | SV *val; |
343 | { |
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344 | if (!av) |
345 | return; |
346 | av_store(av,AvFILL(av)+1,val); |
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347 | } |
348 | |
349 | SV * |
463ee0b2 |
350 | av_pop(av) |
351 | register AV *av; |
79072805 |
352 | { |
353 | SV *retval; |
354 | |
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355 | if (!av || AvFILL(av) < 0) |
356 | return &sv_undef; |
463ee0b2 |
357 | retval = AvARRAY(av)[AvFILL(av)]; |
a0d0e21e |
358 | AvARRAY(av)[AvFILL(av)--] = &sv_undef; |
8990e307 |
359 | if (SvSMAGICAL(av)) |
463ee0b2 |
360 | mg_set((SV*)av); |
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361 | return retval; |
362 | } |
363 | |
364 | void |
463ee0b2 |
365 | av_unshift(av,num) |
366 | register AV *av; |
79072805 |
367 | register I32 num; |
368 | { |
369 | register I32 i; |
370 | register SV **sstr,**dstr; |
371 | |
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372 | if (!av || num <= 0) |
79072805 |
373 | return; |
a0d0e21e |
374 | if (!AvREAL(av)) { |
375 | if (AvREIFY(av)) |
376 | av_reify(av); |
377 | else |
378 | croak("Can't unshift"); |
79072805 |
379 | } |
a0d0e21e |
380 | i = AvARRAY(av) - AvALLOC(av); |
381 | if (i) { |
382 | if (i > num) |
383 | i = num; |
384 | num -= i; |
385 | |
386 | AvMAX(av) += i; |
387 | AvFILL(av) += i; |
388 | SvPVX(av) = (char*)(AvARRAY(av) - i); |
389 | } |
390 | if (num) { |
391 | av_extend(av,AvFILL(av)+num); |
392 | AvFILL(av) += num; |
463ee0b2 |
393 | dstr = AvARRAY(av) + AvFILL(av); |
79072805 |
394 | sstr = dstr - num; |
395 | #ifdef BUGGY_MSC5 |
396 | # pragma loop_opt(off) /* don't loop-optimize the following code */ |
397 | #endif /* BUGGY_MSC5 */ |
a0d0e21e |
398 | for (i = AvFILL(av) - num; i >= 0; --i) { |
79072805 |
399 | *dstr-- = *sstr--; |
400 | #ifdef BUGGY_MSC5 |
401 | # pragma loop_opt() /* loop-optimization back to command-line setting */ |
402 | #endif /* BUGGY_MSC5 */ |
403 | } |
a0d0e21e |
404 | while (num) |
405 | AvARRAY(av)[--num] = &sv_undef; |
79072805 |
406 | } |
407 | } |
408 | |
409 | SV * |
463ee0b2 |
410 | av_shift(av) |
411 | register AV *av; |
79072805 |
412 | { |
413 | SV *retval; |
414 | |
a0d0e21e |
415 | if (!av || AvFILL(av) < 0) |
416 | return &sv_undef; |
463ee0b2 |
417 | retval = *AvARRAY(av); |
a0d0e21e |
418 | if (AvREAL(av)) |
419 | *AvARRAY(av) = &sv_undef; |
463ee0b2 |
420 | SvPVX(av) = (char*)(AvARRAY(av) + 1); |
421 | AvMAX(av)--; |
422 | AvFILL(av)--; |
8990e307 |
423 | if (SvSMAGICAL(av)) |
463ee0b2 |
424 | mg_set((SV*)av); |
79072805 |
425 | return retval; |
426 | } |
427 | |
428 | I32 |
463ee0b2 |
429 | av_len(av) |
430 | register AV *av; |
79072805 |
431 | { |
463ee0b2 |
432 | return AvFILL(av); |
79072805 |
433 | } |
434 | |
435 | void |
463ee0b2 |
436 | av_fill(av, fill) |
437 | register AV *av; |
79072805 |
438 | I32 fill; |
439 | { |
a0d0e21e |
440 | if (!av) |
441 | croak("panic: null array"); |
79072805 |
442 | if (fill < 0) |
443 | fill = -1; |
463ee0b2 |
444 | if (fill <= AvMAX(av)) { |
a0d0e21e |
445 | I32 key = AvFILL(av); |
446 | SV** ary = AvARRAY(av); |
447 | |
448 | if (AvREAL(av)) { |
449 | while (key > fill) { |
450 | SvREFCNT_dec(ary[key]); |
451 | ary[key--] = &sv_undef; |
452 | } |
453 | } |
454 | else { |
455 | while (key < fill) |
456 | ary[++key] = &sv_undef; |
457 | } |
458 | |
463ee0b2 |
459 | AvFILL(av) = fill; |
8990e307 |
460 | if (SvSMAGICAL(av)) |
463ee0b2 |
461 | mg_set((SV*)av); |
462 | } |
a0d0e21e |
463 | else |
464 | (void)av_store(av,fill,&sv_undef); |
79072805 |
465 | } |