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84d4ea48 JH |
1 | /* pp_sort.c |
2 | * | |
1129b882 NC |
3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
4 | * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others | |
84d4ea48 JH |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public | |
7 | * License or the Artistic License, as specified in the README file. | |
8 | * | |
9 | */ | |
10 | ||
11 | /* | |
4ac71550 TC |
12 | * ...they shuffled back towards the rear of the line. 'No, not at the |
13 | * rear!' the slave-driver shouted. 'Three files up. And stay there... | |
14 | * | |
15 | * [p.931 of _The Lord of the Rings_, VI/ii: "The Land of Shadow"] | |
84d4ea48 JH |
16 | */ |
17 | ||
166f8a29 DM |
18 | /* This file contains pp ("push/pop") functions that |
19 | * execute the opcodes that make up a perl program. A typical pp function | |
20 | * expects to find its arguments on the stack, and usually pushes its | |
21 | * results onto the stack, hence the 'pp' terminology. Each OP structure | |
22 | * contains a pointer to the relevant pp_foo() function. | |
23 | * | |
24 | * This particular file just contains pp_sort(), which is complex | |
25 | * enough to merit its own file! See the other pp*.c files for the rest of | |
26 | * the pp_ functions. | |
27 | */ | |
28 | ||
84d4ea48 JH |
29 | #include "EXTERN.h" |
30 | #define PERL_IN_PP_SORT_C | |
31 | #include "perl.h" | |
32 | ||
c53fc8a6 | 33 | #ifndef SMALLSORT |
7ea738a9 | 34 | #define SMALLSORT (200) |
c53fc8a6 JH |
35 | #endif |
36 | ||
84d4ea48 JH |
37 | /* |
38 | * The mergesort implementation is by Peter M. Mcilroy <pmcilroy@lucent.com>. | |
39 | * | |
40 | * The original code was written in conjunction with BSD Computer Software | |
41 | * Research Group at University of California, Berkeley. | |
42 | * | |
393db44d JL |
43 | * See also: "Optimistic Sorting and Information Theoretic Complexity" |
44 | * Peter McIlroy | |
45 | * SODA (Fourth Annual ACM-SIAM Symposium on Discrete Algorithms), | |
46 | * pp 467-474, Austin, Texas, 25-27 January 1993. | |
84d4ea48 | 47 | * |
393db44d | 48 | * The integration to Perl is by John P. Linderman <jpl.jpl@gmail.com>. |
84d4ea48 JH |
49 | * |
50 | * The code can be distributed under the same terms as Perl itself. | |
51 | * | |
52 | */ | |
53 | ||
84d4ea48 | 54 | |
7ea738a9 TK |
55 | typedef char * aptr; /* pointer for arithmetic on sizes */ |
56 | typedef SV * gptr; /* pointers in our lists */ | |
84d4ea48 JH |
57 | |
58 | /* Binary merge internal sort, with a few special mods | |
59 | ** for the special perl environment it now finds itself in. | |
60 | ** | |
61 | ** Things that were once options have been hotwired | |
62 | ** to values suitable for this use. In particular, we'll always | |
63 | ** initialize looking for natural runs, we'll always produce stable | |
64 | ** output, and we'll always do Peter McIlroy's binary merge. | |
65 | */ | |
66 | ||
67 | /* Pointer types for arithmetic and storage and convenience casts */ | |
68 | ||
7ea738a9 TK |
69 | #define APTR(P) ((aptr)(P)) |
70 | #define GPTP(P) ((gptr *)(P)) | |
84d4ea48 JH |
71 | #define GPPP(P) ((gptr **)(P)) |
72 | ||
73 | ||
74 | /* byte offset from pointer P to (larger) pointer Q */ | |
7ea738a9 | 75 | #define BYTEOFF(P, Q) (APTR(Q) - APTR(P)) |
84d4ea48 JH |
76 | |
77 | #define PSIZE sizeof(gptr) | |
78 | ||
79 | /* If PSIZE is power of 2, make PSHIFT that power, if that helps */ | |
80 | ||
7ea738a9 TK |
81 | #ifdef PSHIFT |
82 | #define PNELEM(P, Q) (BYTEOFF(P,Q) >> (PSHIFT)) | |
83 | #define PNBYTE(N) ((N) << (PSHIFT)) | |
84 | #define PINDEX(P, N) (GPTP(APTR(P) + PNBYTE(N))) | |
84d4ea48 JH |
85 | #else |
86 | /* Leave optimization to compiler */ | |
7ea738a9 TK |
87 | #define PNELEM(P, Q) (GPTP(Q) - GPTP(P)) |
88 | #define PNBYTE(N) ((N) * (PSIZE)) | |
89 | #define PINDEX(P, N) (GPTP(P) + (N)) | |
84d4ea48 JH |
90 | #endif |
91 | ||
92 | /* Pointer into other corresponding to pointer into this */ | |
7ea738a9 | 93 | #define POTHER(P, THIS, OTHER) GPTP(APTR(OTHER) + BYTEOFF(THIS,P)) |
84d4ea48 JH |
94 | |
95 | #define FROMTOUPTO(src, dst, lim) do *dst++ = *src++; while(src<lim) | |
96 | ||
97 | ||
486ec47a | 98 | /* Runs are identified by a pointer in the auxiliary list. |
84d4ea48 JH |
99 | ** The pointer is at the start of the list, |
100 | ** and it points to the start of the next list. | |
101 | ** NEXT is used as an lvalue, too. | |
102 | */ | |
103 | ||
7ea738a9 | 104 | #define NEXT(P) (*GPPP(P)) |
84d4ea48 JH |
105 | |
106 | ||
107 | /* PTHRESH is the minimum number of pairs with the same sense to justify | |
108 | ** checking for a run and extending it. Note that PTHRESH counts PAIRS, | |
109 | ** not just elements, so PTHRESH == 8 means a run of 16. | |
110 | */ | |
111 | ||
7ea738a9 | 112 | #define PTHRESH (8) |
84d4ea48 JH |
113 | |
114 | /* RTHRESH is the number of elements in a run that must compare low | |
115 | ** to the low element from the opposing run before we justify | |
116 | ** doing a binary rampup instead of single stepping. | |
117 | ** In random input, N in a row low should only happen with | |
118 | ** probability 2^(1-N), so we can risk that we are dealing | |
119 | ** with orderly input without paying much when we aren't. | |
120 | */ | |
121 | ||
122 | #define RTHRESH (6) | |
123 | ||
124 | ||
125 | /* | |
126 | ** Overview of algorithm and variables. | |
127 | ** The array of elements at list1 will be organized into runs of length 2, | |
128 | ** or runs of length >= 2 * PTHRESH. We only try to form long runs when | |
129 | ** PTHRESH adjacent pairs compare in the same way, suggesting overall order. | |
130 | ** | |
131 | ** Unless otherwise specified, pair pointers address the first of two elements. | |
132 | ** | |
a0288114 AL |
133 | ** b and b+1 are a pair that compare with sense "sense". |
134 | ** b is the "bottom" of adjacent pairs that might form a longer run. | |
84d4ea48 JH |
135 | ** |
136 | ** p2 parallels b in the list2 array, where runs are defined by | |
137 | ** a pointer chain. | |
138 | ** | |
a0288114 | 139 | ** t represents the "top" of the adjacent pairs that might extend |
84d4ea48 JH |
140 | ** the run beginning at b. Usually, t addresses a pair |
141 | ** that compares with opposite sense from (b,b+1). | |
142 | ** However, it may also address a singleton element at the end of list1, | |
a0288114 | 143 | ** or it may be equal to "last", the first element beyond list1. |
84d4ea48 JH |
144 | ** |
145 | ** r addresses the Nth pair following b. If this would be beyond t, | |
146 | ** we back it off to t. Only when r is less than t do we consider the | |
147 | ** run long enough to consider checking. | |
148 | ** | |
149 | ** q addresses a pair such that the pairs at b through q already form a run. | |
150 | ** Often, q will equal b, indicating we only are sure of the pair itself. | |
151 | ** However, a search on the previous cycle may have revealed a longer run, | |
152 | ** so q may be greater than b. | |
153 | ** | |
154 | ** p is used to work back from a candidate r, trying to reach q, | |
155 | ** which would mean b through r would be a run. If we discover such a run, | |
156 | ** we start q at r and try to push it further towards t. | |
157 | ** If b through r is NOT a run, we detect the wrong order at (p-1,p). | |
158 | ** In any event, after the check (if any), we have two main cases. | |
159 | ** | |
160 | ** 1) Short run. b <= q < p <= r <= t. | |
7ea738a9 TK |
161 | ** b through q is a run (perhaps trivial) |
162 | ** q through p are uninteresting pairs | |
163 | ** p through r is a run | |
84d4ea48 JH |
164 | ** |
165 | ** 2) Long run. b < r <= q < t. | |
7ea738a9 | 166 | ** b through q is a run (of length >= 2 * PTHRESH) |
84d4ea48 JH |
167 | ** |
168 | ** Note that degenerate cases are not only possible, but likely. | |
169 | ** For example, if the pair following b compares with opposite sense, | |
170 | ** then b == q < p == r == t. | |
171 | */ | |
172 | ||
173 | ||
044d25c7 | 174 | PERL_STATIC_FORCE_INLINE IV __attribute__always_inline__ |
d4c19fe8 | 175 | dynprep(pTHX_ gptr *list1, gptr *list2, size_t nmemb, const SVCOMPARE_t cmp) |
84d4ea48 | 176 | { |
957d8989 | 177 | I32 sense; |
eb578fdb KW |
178 | gptr *b, *p, *q, *t, *p2; |
179 | gptr *last, *r; | |
957d8989 | 180 | IV runs = 0; |
84d4ea48 JH |
181 | |
182 | b = list1; | |
183 | last = PINDEX(b, nmemb); | |
184 | sense = (cmp(aTHX_ *b, *(b+1)) > 0); | |
185 | for (p2 = list2; b < last; ) { | |
7ea738a9 TK |
186 | /* We just started, or just reversed sense. |
187 | ** Set t at end of pairs with the prevailing sense. | |
188 | */ | |
189 | for (p = b+2, t = p; ++p < last; t = ++p) { | |
190 | if ((cmp(aTHX_ *t, *p) > 0) != sense) break; | |
191 | } | |
192 | q = b; | |
193 | /* Having laid out the playing field, look for long runs */ | |
194 | do { | |
195 | p = r = b + (2 * PTHRESH); | |
196 | if (r >= t) p = r = t; /* too short to care about */ | |
197 | else { | |
198 | while (((cmp(aTHX_ *(p-1), *p) > 0) == sense) && | |
199 | ((p -= 2) > q)) {} | |
200 | if (p <= q) { | |
201 | /* b through r is a (long) run. | |
202 | ** Extend it as far as possible. | |
203 | */ | |
204 | p = q = r; | |
205 | while (((p += 2) < t) && | |
206 | ((cmp(aTHX_ *(p-1), *p) > 0) == sense)) q = p; | |
207 | r = p = q + 2; /* no simple pairs, no after-run */ | |
208 | } | |
209 | } | |
210 | if (q > b) { /* run of greater than 2 at b */ | |
211 | gptr *savep = p; | |
212 | ||
213 | p = q += 2; | |
214 | /* pick up singleton, if possible */ | |
215 | if ((p == t) && | |
216 | ((t + 1) == last) && | |
217 | ((cmp(aTHX_ *(p-1), *p) > 0) == sense)) | |
218 | savep = r = p = q = last; | |
219 | p2 = NEXT(p2) = p2 + (p - b); ++runs; | |
220 | if (sense) | |
221 | while (b < --p) { | |
222 | const gptr c = *b; | |
223 | *b++ = *p; | |
224 | *p = c; | |
225 | } | |
226 | p = savep; | |
227 | } | |
228 | while (q < p) { /* simple pairs */ | |
229 | p2 = NEXT(p2) = p2 + 2; ++runs; | |
230 | if (sense) { | |
231 | const gptr c = *q++; | |
232 | *(q-1) = *q; | |
233 | *q++ = c; | |
234 | } else q += 2; | |
235 | } | |
236 | if (((b = p) == t) && ((t+1) == last)) { | |
237 | NEXT(p2) = p2 + 1; ++runs; | |
238 | b++; | |
239 | } | |
240 | q = r; | |
241 | } while (b < t); | |
242 | sense = !sense; | |
84d4ea48 | 243 | } |
957d8989 | 244 | return runs; |
84d4ea48 JH |
245 | } |
246 | ||
247 | ||
3fe0b9a9 | 248 | /* The original merge sort, in use since 5.7, was as fast as, or faster than, |
957d8989 | 249 | * qsort on many platforms, but slower than qsort, conspicuously so, |
3fe0b9a9 | 250 | * on others. The most likely explanation was platform-specific |
957d8989 JL |
251 | * differences in cache sizes and relative speeds. |
252 | * | |
253 | * The quicksort divide-and-conquer algorithm guarantees that, as the | |
254 | * problem is subdivided into smaller and smaller parts, the parts | |
255 | * fit into smaller (and faster) caches. So it doesn't matter how | |
256 | * many levels of cache exist, quicksort will "find" them, and, | |
e62b3022 | 257 | * as long as smaller is faster, take advantage of them. |
957d8989 | 258 | * |
3fe0b9a9 | 259 | * By contrast, consider how the original mergesort algorithm worked. |
957d8989 JL |
260 | * Suppose we have five runs (each typically of length 2 after dynprep). |
261 | * | |
262 | * pass base aux | |
263 | * 0 1 2 3 4 5 | |
264 | * 1 12 34 5 | |
265 | * 2 1234 5 | |
266 | * 3 12345 | |
267 | * 4 12345 | |
268 | * | |
269 | * Adjacent pairs are merged in "grand sweeps" through the input. | |
270 | * This means, on pass 1, the records in runs 1 and 2 aren't revisited until | |
271 | * runs 3 and 4 are merged and the runs from run 5 have been copied. | |
272 | * The only cache that matters is one large enough to hold *all* the input. | |
273 | * On some platforms, this may be many times slower than smaller caches. | |
274 | * | |
275 | * The following pseudo-code uses the same basic merge algorithm, | |
276 | * but in a divide-and-conquer way. | |
277 | * | |
278 | * # merge $runs runs at offset $offset of list $list1 into $list2. | |
279 | * # all unmerged runs ($runs == 1) originate in list $base. | |
280 | * sub mgsort2 { | |
281 | * my ($offset, $runs, $base, $list1, $list2) = @_; | |
282 | * | |
283 | * if ($runs == 1) { | |
284 | * if ($list1 is $base) copy run to $list2 | |
285 | * return offset of end of list (or copy) | |
286 | * } else { | |
287 | * $off2 = mgsort2($offset, $runs-($runs/2), $base, $list2, $list1) | |
288 | * mgsort2($off2, $runs/2, $base, $list2, $list1) | |
289 | * merge the adjacent runs at $offset of $list1 into $list2 | |
290 | * return the offset of the end of the merged runs | |
291 | * } | |
292 | * } | |
293 | * mgsort2(0, $runs, $base, $aux, $base); | |
294 | * | |
295 | * For our 5 runs, the tree of calls looks like | |
296 | * | |
297 | * 5 | |
298 | * 3 2 | |
299 | * 2 1 1 1 | |
300 | * 1 1 | |
301 | * | |
302 | * 1 2 3 4 5 | |
303 | * | |
304 | * and the corresponding activity looks like | |
305 | * | |
306 | * copy runs 1 and 2 from base to aux | |
307 | * merge runs 1 and 2 from aux to base | |
308 | * (run 3 is where it belongs, no copy needed) | |
309 | * merge runs 12 and 3 from base to aux | |
310 | * (runs 4 and 5 are where they belong, no copy needed) | |
311 | * merge runs 4 and 5 from base to aux | |
312 | * merge runs 123 and 45 from aux to base | |
313 | * | |
314 | * Note that we merge runs 1 and 2 immediately after copying them, | |
315 | * while they are still likely to be in fast cache. Similarly, | |
316 | * run 3 is merged with run 12 while it still may be lingering in cache. | |
317 | * This implementation should therefore enjoy much of the cache-friendly | |
318 | * behavior that quicksort does. In addition, it does less copying | |
319 | * than the original mergesort implementation (only runs 1 and 2 are copied) | |
320 | * and the "balancing" of merges is better (merged runs comprise more nearly | |
321 | * equal numbers of original runs). | |
322 | * | |
323 | * The actual cache-friendly implementation will use a pseudo-stack | |
324 | * to avoid recursion, and will unroll processing of runs of length 2, | |
325 | * but it is otherwise similar to the recursive implementation. | |
957d8989 JL |
326 | */ |
327 | ||
328 | typedef struct { | |
7ea738a9 TK |
329 | IV offset; /* offset of 1st of 2 runs at this level */ |
330 | IV runs; /* how many runs must be combined into 1 */ | |
331 | } off_runs; /* pseudo-stack element */ | |
957d8989 | 332 | |
044d25c7 TK |
333 | PERL_STATIC_FORCE_INLINE void |
334 | S_sortsv_flags_impl(pTHX_ gptr *base, size_t nmemb, SVCOMPARE_t cmp, U32 flags) | |
957d8989 | 335 | { |
551405c4 | 336 | IV i, run, offset; |
957d8989 | 337 | I32 sense, level; |
eb578fdb | 338 | gptr *f1, *f2, *t, *b, *p; |
957d8989 | 339 | int iwhich; |
551405c4 | 340 | gptr *aux; |
957d8989 JL |
341 | gptr *p1; |
342 | gptr small[SMALLSORT]; | |
343 | gptr *which[3]; | |
344 | off_runs stack[60], *stackp; | |
345 | ||
aa4119bb | 346 | PERL_UNUSED_ARG(flags); |
044d25c7 | 347 | PERL_ARGS_ASSERT_SORTSV_FLAGS_IMPL; |
7ea738a9 | 348 | if (nmemb <= 1) return; /* sorted trivially */ |
6c3fb703 | 349 | |
7ea738a9 TK |
350 | if (nmemb <= SMALLSORT) aux = small; /* use stack for aux array */ |
351 | else { Newx(aux,nmemb,gptr); } /* allocate auxiliary array */ | |
957d8989 JL |
352 | level = 0; |
353 | stackp = stack; | |
354 | stackp->runs = dynprep(aTHX_ base, aux, nmemb, cmp); | |
355 | stackp->offset = offset = 0; | |
356 | which[0] = which[2] = base; | |
357 | which[1] = aux; | |
358 | for (;;) { | |
7ea738a9 TK |
359 | /* On levels where both runs have be constructed (stackp->runs == 0), |
360 | * merge them, and note the offset of their end, in case the offset | |
361 | * is needed at the next level up. Hop up a level, and, | |
362 | * as long as stackp->runs is 0, keep merging. | |
363 | */ | |
364 | IV runs = stackp->runs; | |
365 | if (runs == 0) { | |
366 | gptr *list1, *list2; | |
367 | iwhich = level & 1; | |
368 | list1 = which[iwhich]; /* area where runs are now */ | |
369 | list2 = which[++iwhich]; /* area for merged runs */ | |
370 | do { | |
371 | gptr *l1, *l2, *tp2; | |
372 | offset = stackp->offset; | |
373 | f1 = p1 = list1 + offset; /* start of first run */ | |
374 | p = tp2 = list2 + offset; /* where merged run will go */ | |
375 | t = NEXT(p); /* where first run ends */ | |
376 | f2 = l1 = POTHER(t, list2, list1); /* ... on the other side */ | |
377 | t = NEXT(t); /* where second runs ends */ | |
378 | l2 = POTHER(t, list2, list1); /* ... on the other side */ | |
379 | offset = PNELEM(list2, t); | |
380 | while (f1 < l1 && f2 < l2) { | |
381 | /* If head 1 is larger than head 2, find ALL the elements | |
382 | ** in list 2 strictly less than head1, write them all, | |
383 | ** then head 1. Then compare the new heads, and repeat, | |
384 | ** until one or both lists are exhausted. | |
385 | ** | |
386 | ** In all comparisons (after establishing | |
387 | ** which head to merge) the item to merge | |
388 | ** (at pointer q) is the first operand of | |
389 | ** the comparison. When we want to know | |
390 | ** if "q is strictly less than the other", | |
391 | ** we can't just do | |
392 | ** cmp(q, other) < 0 | |
393 | ** because stability demands that we treat equality | |
394 | ** as high when q comes from l2, and as low when | |
395 | ** q was from l1. So we ask the question by doing | |
396 | ** cmp(q, other) <= sense | |
397 | ** and make sense == 0 when equality should look low, | |
398 | ** and -1 when equality should look high. | |
399 | */ | |
400 | ||
401 | gptr *q; | |
402 | if (cmp(aTHX_ *f1, *f2) <= 0) { | |
403 | q = f2; b = f1; t = l1; | |
404 | sense = -1; | |
405 | } else { | |
406 | q = f1; b = f2; t = l2; | |
407 | sense = 0; | |
408 | } | |
409 | ||
410 | ||
411 | /* ramp up | |
412 | ** | |
413 | ** Leave t at something strictly | |
414 | ** greater than q (or at the end of the list), | |
415 | ** and b at something strictly less than q. | |
416 | */ | |
417 | for (i = 1, run = 0 ;;) { | |
418 | if ((p = PINDEX(b, i)) >= t) { | |
419 | /* off the end */ | |
420 | if (((p = PINDEX(t, -1)) > b) && | |
421 | (cmp(aTHX_ *q, *p) <= sense)) | |
422 | t = p; | |
423 | else b = p; | |
424 | break; | |
425 | } else if (cmp(aTHX_ *q, *p) <= sense) { | |
426 | t = p; | |
427 | break; | |
428 | } else b = p; | |
429 | if (++run >= RTHRESH) i += i; | |
430 | } | |
431 | ||
432 | ||
433 | /* q is known to follow b and must be inserted before t. | |
434 | ** Increment b, so the range of possibilities is [b,t). | |
435 | ** Round binary split down, to favor early appearance. | |
436 | ** Adjust b and t until q belongs just before t. | |
437 | */ | |
438 | ||
439 | b++; | |
440 | while (b < t) { | |
441 | p = PINDEX(b, (PNELEM(b, t) - 1) / 2); | |
442 | if (cmp(aTHX_ *q, *p) <= sense) { | |
443 | t = p; | |
444 | } else b = p + 1; | |
445 | } | |
446 | ||
447 | ||
448 | /* Copy all the strictly low elements */ | |
449 | ||
450 | if (q == f1) { | |
451 | FROMTOUPTO(f2, tp2, t); | |
452 | *tp2++ = *f1++; | |
453 | } else { | |
454 | FROMTOUPTO(f1, tp2, t); | |
455 | *tp2++ = *f2++; | |
456 | } | |
457 | } | |
458 | ||
459 | ||
460 | /* Run out remaining list */ | |
461 | if (f1 == l1) { | |
462 | if (f2 < l2) FROMTOUPTO(f2, tp2, l2); | |
463 | } else FROMTOUPTO(f1, tp2, l1); | |
464 | p1 = NEXT(p1) = POTHER(tp2, list2, list1); | |
465 | ||
466 | if (--level == 0) goto done; | |
467 | --stackp; | |
468 | t = list1; list1 = list2; list2 = t; /* swap lists */ | |
469 | } while ((runs = stackp->runs) == 0); | |
470 | } | |
471 | ||
472 | ||
473 | stackp->runs = 0; /* current run will finish level */ | |
474 | /* While there are more than 2 runs remaining, | |
475 | * turn them into exactly 2 runs (at the "other" level), | |
476 | * each made up of approximately half the runs. | |
477 | * Stack the second half for later processing, | |
478 | * and set about producing the first half now. | |
479 | */ | |
480 | while (runs > 2) { | |
481 | ++level; | |
482 | ++stackp; | |
483 | stackp->offset = offset; | |
484 | runs -= stackp->runs = runs / 2; | |
485 | } | |
486 | /* We must construct a single run from 1 or 2 runs. | |
487 | * All the original runs are in which[0] == base. | |
488 | * The run we construct must end up in which[level&1]. | |
489 | */ | |
490 | iwhich = level & 1; | |
491 | if (runs == 1) { | |
492 | /* Constructing a single run from a single run. | |
493 | * If it's where it belongs already, there's nothing to do. | |
494 | * Otherwise, copy it to where it belongs. | |
495 | * A run of 1 is either a singleton at level 0, | |
496 | * or the second half of a split 3. In neither event | |
497 | * is it necessary to set offset. It will be set by the merge | |
498 | * that immediately follows. | |
499 | */ | |
500 | if (iwhich) { /* Belongs in aux, currently in base */ | |
501 | f1 = b = PINDEX(base, offset); /* where list starts */ | |
502 | f2 = PINDEX(aux, offset); /* where list goes */ | |
503 | t = NEXT(f2); /* where list will end */ | |
504 | offset = PNELEM(aux, t); /* offset thereof */ | |
505 | t = PINDEX(base, offset); /* where it currently ends */ | |
506 | FROMTOUPTO(f1, f2, t); /* copy */ | |
507 | NEXT(b) = t; /* set up parallel pointer */ | |
508 | } else if (level == 0) goto done; /* single run at level 0 */ | |
509 | } else { | |
510 | /* Constructing a single run from two runs. | |
511 | * The merge code at the top will do that. | |
512 | * We need only make sure the two runs are in the "other" array, | |
513 | * so they'll end up in the correct array after the merge. | |
514 | */ | |
515 | ++level; | |
516 | ++stackp; | |
517 | stackp->offset = offset; | |
518 | stackp->runs = 0; /* take care of both runs, trigger merge */ | |
519 | if (!iwhich) { /* Merged runs belong in aux, copy 1st */ | |
520 | f1 = b = PINDEX(base, offset); /* where first run starts */ | |
521 | f2 = PINDEX(aux, offset); /* where it will be copied */ | |
522 | t = NEXT(f2); /* where first run will end */ | |
523 | offset = PNELEM(aux, t); /* offset thereof */ | |
524 | p = PINDEX(base, offset); /* end of first run */ | |
525 | t = NEXT(t); /* where second run will end */ | |
526 | t = PINDEX(base, PNELEM(aux, t)); /* where it now ends */ | |
527 | FROMTOUPTO(f1, f2, t); /* copy both runs */ | |
528 | NEXT(b) = p; /* paralleled pointer for 1st */ | |
529 | NEXT(p) = t; /* ... and for second */ | |
530 | } | |
531 | } | |
957d8989 | 532 | } |
7b52d656 | 533 | done: |
7ea738a9 | 534 | if (aux != small) Safefree(aux); /* free iff allocated */ |
044d25c7 | 535 | |
957d8989 JL |
536 | return; |
537 | } | |
538 | ||
84d4ea48 | 539 | /* |
044d25c7 TK |
540 | =for apidoc sortsv_flags |
541 | ||
542 | In-place sort an array of SV pointers with the given comparison routine, | |
543 | with various SORTf_* flag options. | |
544 | ||
545 | =cut | |
546 | */ | |
547 | void | |
548 | Perl_sortsv_flags(pTHX_ gptr *base, size_t nmemb, SVCOMPARE_t cmp, U32 flags) | |
549 | { | |
550 | PERL_ARGS_ASSERT_SORTSV_FLAGS; | |
551 | ||
552 | sortsv_flags_impl(base, nmemb, cmp, flags); | |
553 | } | |
554 | ||
555 | /* | |
556 | * Each of sortsv_* functions contains an inlined copy of | |
557 | * sortsv_flags_impl() with an inlined comparator. Basically, we are | |
558 | * emulating C++ templates by using __attribute__((always_inline)). | |
559 | * | |
560 | * The purpose of that is to avoid the function call overhead inside | |
561 | * the sorting routine, which calls the comparison function multiple | |
562 | * times per sorted item. | |
563 | */ | |
564 | ||
565 | static void | |
566 | sortsv_amagic_i_ncmp(pTHX_ gptr *base, size_t nmemb, U32 flags) | |
567 | { | |
568 | sortsv_flags_impl(base, nmemb, S_amagic_i_ncmp, flags); | |
569 | } | |
570 | ||
571 | static void | |
572 | sortsv_amagic_i_ncmp_desc(pTHX_ gptr *base, size_t nmemb, U32 flags) | |
573 | { | |
574 | sortsv_flags_impl(base, nmemb, S_amagic_i_ncmp_desc, flags); | |
575 | } | |
576 | ||
577 | static void | |
578 | sortsv_i_ncmp(pTHX_ gptr *base, size_t nmemb, U32 flags) | |
579 | { | |
580 | sortsv_flags_impl(base, nmemb, S_sv_i_ncmp, flags); | |
581 | } | |
582 | ||
583 | static void | |
584 | sortsv_i_ncmp_desc(pTHX_ gptr *base, size_t nmemb, U32 flags) | |
585 | { | |
586 | sortsv_flags_impl(base, nmemb, S_sv_i_ncmp_desc, flags); | |
587 | } | |
588 | ||
589 | static void | |
590 | sortsv_amagic_ncmp(pTHX_ gptr *base, size_t nmemb, U32 flags) | |
591 | { | |
592 | sortsv_flags_impl(base, nmemb, S_amagic_ncmp, flags); | |
593 | } | |
594 | ||
595 | static void | |
596 | sortsv_amagic_ncmp_desc(pTHX_ gptr *base, size_t nmemb, U32 flags) | |
597 | { | |
598 | sortsv_flags_impl(base, nmemb, S_amagic_ncmp_desc, flags); | |
599 | } | |
600 | ||
601 | static void | |
602 | sortsv_ncmp(pTHX_ gptr *base, size_t nmemb, U32 flags) | |
603 | { | |
604 | sortsv_flags_impl(base, nmemb, S_sv_ncmp, flags); | |
605 | } | |
606 | ||
607 | static void | |
608 | sortsv_ncmp_desc(pTHX_ gptr *base, size_t nmemb, U32 flags) | |
609 | { | |
610 | sortsv_flags_impl(base, nmemb, S_sv_ncmp_desc, flags); | |
611 | } | |
612 | ||
613 | static void | |
614 | sortsv_amagic_cmp(pTHX_ gptr *base, size_t nmemb, U32 flags) | |
615 | { | |
616 | sortsv_flags_impl(base, nmemb, S_amagic_cmp, flags); | |
617 | } | |
618 | ||
619 | static void | |
620 | sortsv_amagic_cmp_desc(pTHX_ gptr *base, size_t nmemb, U32 flags) | |
621 | { | |
622 | sortsv_flags_impl(base, nmemb, S_amagic_cmp_desc, flags); | |
623 | } | |
624 | ||
625 | static void | |
626 | sortsv_cmp(pTHX_ gptr *base, size_t nmemb, U32 flags) | |
627 | { | |
628 | sortsv_flags_impl(base, nmemb, Perl_sv_cmp, flags); | |
629 | } | |
630 | ||
631 | static void | |
632 | sortsv_cmp_desc(pTHX_ gptr *base, size_t nmemb, U32 flags) | |
633 | { | |
634 | sortsv_flags_impl(base, nmemb, S_cmp_desc, flags); | |
635 | } | |
636 | ||
637 | #ifdef USE_LOCALE_COLLATE | |
638 | ||
639 | static void | |
640 | sortsv_amagic_cmp_locale(pTHX_ gptr *base, size_t nmemb, U32 flags) | |
641 | { | |
642 | sortsv_flags_impl(base, nmemb, S_amagic_cmp_locale, flags); | |
643 | } | |
644 | ||
645 | static void | |
646 | sortsv_amagic_cmp_locale_desc(pTHX_ gptr *base, size_t nmemb, U32 flags) | |
647 | { | |
648 | sortsv_flags_impl(base, nmemb, S_amagic_cmp_locale_desc, flags); | |
649 | } | |
650 | ||
651 | static void | |
652 | sortsv_cmp_locale(pTHX_ gptr *base, size_t nmemb, U32 flags) | |
653 | { | |
654 | sortsv_flags_impl(base, nmemb, Perl_sv_cmp_locale, flags); | |
655 | } | |
656 | ||
657 | static void | |
658 | sortsv_cmp_locale_desc(pTHX_ gptr *base, size_t nmemb, U32 flags) | |
659 | { | |
660 | sortsv_flags_impl(base, nmemb, S_cmp_locale_desc, flags); | |
661 | } | |
662 | ||
663 | #endif | |
664 | ||
665 | /* | |
ccfc67b7 | 666 | |
84d4ea48 JH |
667 | =for apidoc sortsv |
668 | ||
8f5d5a51 | 669 | In-place sort an array of SV pointers with the given comparison routine. |
84d4ea48 | 670 | |
796b6530 | 671 | Currently this always uses mergesort. See C<L</sortsv_flags>> for a more |
7b9ef140 | 672 | flexible routine. |
78210658 | 673 | |
84d4ea48 JH |
674 | =cut |
675 | */ | |
4eb872f6 | 676 | |
84d4ea48 JH |
677 | void |
678 | Perl_sortsv(pTHX_ SV **array, size_t nmemb, SVCOMPARE_t cmp) | |
679 | { | |
7918f24d NC |
680 | PERL_ARGS_ASSERT_SORTSV; |
681 | ||
7b9ef140 | 682 | sortsv_flags(array, nmemb, cmp, 0); |
6c3fb703 NC |
683 | } |
684 | ||
4d562308 SF |
685 | #define SvNSIOK(sv) ((SvFLAGS(sv) & SVf_NOK) || ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) == SVf_IOK)) |
686 | #define SvSIOK(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) == SVf_IOK) | |
687 | #define SvNSIV(sv) ( SvNOK(sv) ? SvNVX(sv) : ( SvSIOK(sv) ? SvIVX(sv) : sv_2nv(sv) ) ) | |
688 | ||
84d4ea48 JH |
689 | PP(pp_sort) |
690 | { | |
20b7effb | 691 | dSP; dMARK; dORIGMARK; |
eb578fdb | 692 | SV **p1 = ORIGMARK+1, **p2; |
c70927a6 | 693 | SSize_t max, i; |
7d49f689 | 694 | AV* av = NULL; |
84d4ea48 | 695 | GV *gv; |
cbbf8932 | 696 | CV *cv = NULL; |
1c23e2bd | 697 | U8 gimme = GIMME_V; |
0bcc34c2 | 698 | OP* const nextop = PL_op->op_next; |
84d4ea48 JH |
699 | I32 overloading = 0; |
700 | bool hasargs = FALSE; | |
2b66f6d3 | 701 | bool copytmps; |
84d4ea48 | 702 | I32 is_xsub = 0; |
901017d6 AL |
703 | const U8 priv = PL_op->op_private; |
704 | const U8 flags = PL_op->op_flags; | |
7b9ef140 | 705 | U32 sort_flags = 0; |
044d25c7 | 706 | I32 all_SIVs = 1, descending = 0; |
84d4ea48 | 707 | |
7b9ef140 | 708 | if ((priv & OPpSORT_DESCEND) != 0) |
044d25c7 | 709 | descending = 1; |
7b9ef140 | 710 | |
eb7e169e | 711 | if (gimme != G_LIST) { |
7ea738a9 TK |
712 | SP = MARK; |
713 | EXTEND(SP,1); | |
714 | RETPUSHUNDEF; | |
84d4ea48 JH |
715 | } |
716 | ||
717 | ENTER; | |
718 | SAVEVPTR(PL_sortcop); | |
471178c0 | 719 | if (flags & OPf_STACKED) { |
7ea738a9 | 720 | if (flags & OPf_SPECIAL) { |
e6dae479 | 721 | OP *nullop = OpSIBLING(cLISTOP->op_first); /* pass pushmark */ |
932bca29 | 722 | assert(nullop->op_type == OP_NULL); |
7ea738a9 TK |
723 | PL_sortcop = nullop->op_next; |
724 | } | |
725 | else { | |
726 | GV *autogv = NULL; | |
727 | HV *stash; | |
728 | cv = sv_2cv(*++MARK, &stash, &gv, GV_ADD); | |
729 | check_cv: | |
730 | if (cv && SvPOK(cv)) { | |
731 | const char * const proto = SvPV_nolen_const(MUTABLE_SV(cv)); | |
732 | if (proto && strEQ(proto, "$$")) { | |
733 | hasargs = TRUE; | |
734 | } | |
735 | } | |
736 | if (cv && CvISXSUB(cv) && CvXSUB(cv)) { | |
737 | is_xsub = 1; | |
738 | } | |
739 | else if (!(cv && CvROOT(cv))) { | |
740 | if (gv) { | |
741 | goto autoload; | |
742 | } | |
743 | else if (!CvANON(cv) && (gv = CvGV(cv))) { | |
744 | if (cv != GvCV(gv)) cv = GvCV(gv); | |
745 | autoload: | |
746 | if (!autogv && ( | |
747 | autogv = gv_autoload_pvn( | |
748 | GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv), | |
749 | GvNAMEUTF8(gv) ? SVf_UTF8 : 0 | |
750 | ) | |
751 | )) { | |
752 | cv = GvCVu(autogv); | |
753 | goto check_cv; | |
754 | } | |
755 | else { | |
756 | SV *tmpstr = sv_newmortal(); | |
757 | gv_efullname3(tmpstr, gv, NULL); | |
758 | DIE(aTHX_ "Undefined sort subroutine \"%" SVf "\" called", | |
759 | SVfARG(tmpstr)); | |
760 | } | |
761 | } | |
762 | else { | |
763 | DIE(aTHX_ "Undefined subroutine in sort"); | |
764 | } | |
765 | } | |
766 | ||
767 | if (is_xsub) | |
768 | PL_sortcop = (OP*)cv; | |
769 | else | |
770 | PL_sortcop = CvSTART(cv); | |
771 | } | |
84d4ea48 JH |
772 | } |
773 | else { | |
7ea738a9 | 774 | PL_sortcop = NULL; |
84d4ea48 JH |
775 | } |
776 | ||
84721d61 DM |
777 | /* optimiser converts "@a = sort @a" to "sort \@a". In this case, |
778 | * push (@a) onto stack, then assign result back to @a at the end of | |
779 | * this function */ | |
0723351e | 780 | if (priv & OPpSORT_INPLACE) { |
7ea738a9 TK |
781 | assert( MARK+1 == SP && *SP && SvTYPE(*SP) == SVt_PVAV); |
782 | (void)POPMARK; /* remove mark associated with ex-OP_AASSIGN */ | |
783 | av = MUTABLE_AV((*SP)); | |
84721d61 DM |
784 | if (SvREADONLY(av)) |
785 | Perl_croak_no_modify(); | |
7ea738a9 | 786 | max = AvFILL(av) + 1; |
84721d61 | 787 | MEXTEND(SP, max); |
7ea738a9 TK |
788 | if (SvMAGICAL(av)) { |
789 | for (i=0; i < max; i++) { | |
790 | SV **svp = av_fetch(av, i, FALSE); | |
791 | *SP++ = (svp) ? *svp : NULL; | |
792 | } | |
793 | } | |
84721d61 DM |
794 | else { |
795 | SV **svp = AvARRAY(av); | |
796 | assert(svp || max == 0); | |
7ea738a9 | 797 | for (i = 0; i < max; i++) |
84721d61 | 798 | *SP++ = *svp++; |
7ea738a9 | 799 | } |
84721d61 DM |
800 | SP--; |
801 | p1 = p2 = SP - (max-1); | |
fe1bc4cf DM |
802 | } |
803 | else { | |
7ea738a9 TK |
804 | p2 = MARK+1; |
805 | max = SP - MARK; | |
806 | } | |
fe1bc4cf | 807 | |
83a44efe SF |
808 | /* shuffle stack down, removing optional initial cv (p1!=p2), plus |
809 | * any nulls; also stringify or converting to integer or number as | |
810 | * required any args */ | |
ff859a7f | 811 | copytmps = cBOOL(PL_sortcop); |
fe1bc4cf | 812 | for (i=max; i > 0 ; i--) { |
7ea738a9 TK |
813 | if ((*p1 = *p2++)) { /* Weed out nulls. */ |
814 | if (copytmps && SvPADTMP(*p1)) { | |
815 | *p1 = sv_mortalcopy(*p1); | |
816 | } | |
817 | SvTEMP_off(*p1); | |
818 | if (!PL_sortcop) { | |
819 | if (priv & OPpSORT_NUMERIC) { | |
820 | if (priv & OPpSORT_INTEGER) { | |
821 | if (!SvIOK(*p1)) | |
822 | (void)sv_2iv_flags(*p1, SV_GMAGIC|SV_SKIP_OVERLOAD); | |
823 | } | |
824 | else { | |
825 | if (!SvNSIOK(*p1)) | |
826 | (void)sv_2nv_flags(*p1, SV_GMAGIC|SV_SKIP_OVERLOAD); | |
827 | if (all_SIVs && !SvSIOK(*p1)) | |
828 | all_SIVs = 0; | |
829 | } | |
830 | } | |
831 | else { | |
832 | if (!SvPOK(*p1)) | |
833 | (void)sv_2pv_flags(*p1, 0, | |
834 | SV_GMAGIC|SV_CONST_RETURN|SV_SKIP_OVERLOAD); | |
835 | } | |
836 | if (SvAMAGIC(*p1)) | |
837 | overloading = 1; | |
60779a30 | 838 | } |
7ea738a9 TK |
839 | p1++; |
840 | } | |
841 | else | |
842 | max--; | |
84d4ea48 | 843 | } |
fe1bc4cf | 844 | if (max > 1) { |
7ea738a9 TK |
845 | SV **start; |
846 | if (PL_sortcop) { | |
847 | PERL_CONTEXT *cx; | |
848 | const bool oldcatch = CATCH_GET; | |
8ae997c5 | 849 | I32 old_savestack_ix = PL_savestack_ix; |
84d4ea48 | 850 | |
7ea738a9 TK |
851 | SAVEOP(); |
852 | ||
853 | CATCH_SET(TRUE); | |
854 | PUSHSTACKi(PERLSI_SORT); | |
855 | if (!hasargs && !is_xsub) { | |
856 | SAVEGENERICSV(PL_firstgv); | |
857 | SAVEGENERICSV(PL_secondgv); | |
858 | PL_firstgv = MUTABLE_GV(SvREFCNT_inc( | |
859 | gv_fetchpvs("a", GV_ADD|GV_NOTQUAL, SVt_PV) | |
860 | )); | |
861 | PL_secondgv = MUTABLE_GV(SvREFCNT_inc( | |
862 | gv_fetchpvs("b", GV_ADD|GV_NOTQUAL, SVt_PV) | |
863 | )); | |
dc9ef998 TC |
864 | /* make sure the GP isn't removed out from under us for |
865 | * the SAVESPTR() */ | |
866 | save_gp(PL_firstgv, 0); | |
867 | save_gp(PL_secondgv, 0); | |
868 | /* we don't want modifications localized */ | |
869 | GvINTRO_off(PL_firstgv); | |
870 | GvINTRO_off(PL_secondgv); | |
7ea738a9 TK |
871 | SAVEGENERICSV(GvSV(PL_firstgv)); |
872 | SvREFCNT_inc(GvSV(PL_firstgv)); | |
873 | SAVEGENERICSV(GvSV(PL_secondgv)); | |
874 | SvREFCNT_inc(GvSV(PL_secondgv)); | |
875 | } | |
84d4ea48 | 876 | |
33411212 | 877 | gimme = G_SCALAR; |
7ea738a9 TK |
878 | cx = cx_pushblock(CXt_NULL, gimme, PL_stack_base, old_savestack_ix); |
879 | if (!(flags & OPf_SPECIAL)) { | |
880 | cx->cx_type = CXt_SUB|CXp_MULTICALL; | |
881 | cx_pushsub(cx, cv, NULL, hasargs); | |
882 | if (!is_xsub) { | |
883 | PADLIST * const padlist = CvPADLIST(cv); | |
884 | ||
885 | if (++CvDEPTH(cv) >= 2) | |
886 | pad_push(padlist, CvDEPTH(cv)); | |
887 | PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); | |
888 | ||
889 | if (hasargs) { | |
890 | /* This is mostly copied from pp_entersub */ | |
891 | AV * const av = MUTABLE_AV(PAD_SVl(0)); | |
892 | ||
893 | cx->blk_sub.savearray = GvAV(PL_defgv); | |
894 | GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av)); | |
895 | } | |
896 | ||
897 | } | |
898 | } | |
486430a5 | 899 | |
7ea738a9 | 900 | start = p1 - max; |
3edfb5c3 | 901 | Perl_sortsv_flags(aTHX_ start, max, |
7ea738a9 TK |
902 | (is_xsub ? S_sortcv_xsub : hasargs ? S_sortcv_stacked : S_sortcv), |
903 | sort_flags); | |
84d4ea48 | 904 | |
4df352a8 | 905 | /* Reset cx, in case the context stack has been reallocated. */ |
4ebe6e95 | 906 | cx = CX_CUR(); |
4df352a8 | 907 | |
7ea738a9 | 908 | PL_stack_sp = PL_stack_base + cx->blk_oldsp; |
4df352a8 | 909 | |
2f450c1b | 910 | CX_LEAVE_SCOPE(cx); |
7ea738a9 | 911 | if (!(flags & OPf_SPECIAL)) { |
4df352a8 | 912 | assert(CxTYPE(cx) == CXt_SUB); |
a73d8813 | 913 | cx_popsub(cx); |
7ea738a9 | 914 | } |
2f450c1b | 915 | else |
4df352a8 | 916 | assert(CxTYPE(cx) == CXt_NULL); |
2f450c1b | 917 | /* there isn't a POPNULL ! */ |
1dfbe6b4 | 918 | |
7ea738a9 | 919 | cx_popblock(cx); |
5da525e9 | 920 | CX_POP(cx); |
7ea738a9 TK |
921 | POPSTACK; |
922 | CATCH_SET(oldcatch); | |
923 | } | |
924 | else { | |
925 | MEXTEND(SP, 20); /* Can't afford stack realloc on signal. */ | |
926 | start = ORIGMARK+1; | |
433b3e2b TK |
927 | if (priv & OPpSORT_NUMERIC) { |
928 | if ((priv & OPpSORT_INTEGER) || all_SIVs) { | |
929 | if (overloading) | |
044d25c7 TK |
930 | if (descending) |
931 | sortsv_amagic_i_ncmp_desc(aTHX_ start, max, sort_flags); | |
932 | else | |
933 | sortsv_amagic_i_ncmp(aTHX_ start, max, sort_flags); | |
433b3e2b | 934 | else |
044d25c7 TK |
935 | if (descending) |
936 | sortsv_i_ncmp_desc(aTHX_ start, max, sort_flags); | |
937 | else | |
938 | sortsv_i_ncmp(aTHX_ start, max, sort_flags); | |
433b3e2b TK |
939 | } |
940 | else { | |
941 | if (overloading) | |
044d25c7 TK |
942 | if (descending) |
943 | sortsv_amagic_ncmp_desc(aTHX_ start, max, sort_flags); | |
944 | else | |
945 | sortsv_amagic_ncmp(aTHX_ start, max, sort_flags); | |
433b3e2b | 946 | else |
044d25c7 TK |
947 | if (descending) |
948 | sortsv_ncmp_desc(aTHX_ start, max, sort_flags); | |
949 | else | |
950 | sortsv_ncmp(aTHX_ start, max, sort_flags); | |
433b3e2b TK |
951 | } |
952 | } | |
130c5df3 | 953 | #ifdef USE_LOCALE_COLLATE |
433b3e2b TK |
954 | else if(IN_LC_RUNTIME(LC_COLLATE)) { |
955 | if (overloading) | |
044d25c7 TK |
956 | if (descending) |
957 | sortsv_amagic_cmp_locale_desc(aTHX_ start, max, sort_flags); | |
958 | else | |
959 | sortsv_amagic_cmp_locale(aTHX_ start, max, sort_flags); | |
433b3e2b | 960 | else |
044d25c7 TK |
961 | if (descending) |
962 | sortsv_cmp_locale_desc(aTHX_ start, max, sort_flags); | |
963 | else | |
964 | sortsv_cmp_locale(aTHX_ start, max, sort_flags); | |
433b3e2b | 965 | } |
130c5df3 | 966 | #endif |
433b3e2b TK |
967 | else { |
968 | if (overloading) | |
044d25c7 TK |
969 | if (descending) |
970 | sortsv_amagic_cmp_desc(aTHX_ start, max, sort_flags); | |
971 | else | |
972 | sortsv_amagic_cmp(aTHX_ start, max, sort_flags); | |
433b3e2b | 973 | else |
044d25c7 TK |
974 | if (descending) |
975 | sortsv_cmp_desc(aTHX_ start, max, sort_flags); | |
976 | else | |
977 | sortsv_cmp(aTHX_ start, max, sort_flags); | |
433b3e2b | 978 | } |
7ea738a9 TK |
979 | } |
980 | if ((priv & OPpSORT_REVERSE) != 0) { | |
981 | SV **q = start+max-1; | |
982 | while (start < q) { | |
983 | SV * const tmp = *start; | |
984 | *start++ = *q; | |
985 | *q-- = tmp; | |
986 | } | |
987 | } | |
84d4ea48 | 988 | } |
84721d61 DM |
989 | |
990 | if (av) { | |
991 | /* copy back result to the array */ | |
992 | SV** const base = MARK+1; | |
99c9ca9e | 993 | SSize_t max_minus_one = max - 1; /* attempt to work around mingw bug */ |
84721d61 | 994 | if (SvMAGICAL(av)) { |
99c9ca9e | 995 | for (i = 0; i <= max_minus_one; i++) |
84721d61 DM |
996 | base[i] = newSVsv(base[i]); |
997 | av_clear(av); | |
99c9ca9e YO |
998 | if (max_minus_one >= 0) |
999 | av_extend(av, max_minus_one); | |
1000 | for (i=0; i <= max_minus_one; i++) { | |
84721d61 DM |
1001 | SV * const sv = base[i]; |
1002 | SV ** const didstore = av_store(av, i, sv); | |
1003 | if (SvSMAGICAL(sv)) | |
1004 | mg_set(sv); | |
1005 | if (!didstore) | |
1006 | sv_2mortal(sv); | |
1007 | } | |
1008 | } | |
1009 | else { | |
1010 | /* the elements of av are likely to be the same as the | |
1011 | * (non-refcounted) elements on the stack, just in a different | |
1012 | * order. However, its possible that someone's messed with av | |
1013 | * in the meantime. So bump and unbump the relevant refcounts | |
1014 | * first. | |
1015 | */ | |
99c9ca9e | 1016 | for (i = 0; i <= max_minus_one; i++) { |
45c198c1 DM |
1017 | SV *sv = base[i]; |
1018 | assert(sv); | |
1019 | if (SvREFCNT(sv) > 1) | |
1020 | base[i] = newSVsv(sv); | |
1021 | else | |
1022 | SvREFCNT_inc_simple_void_NN(sv); | |
1023 | } | |
84721d61 | 1024 | av_clear(av); |
99c9ca9e YO |
1025 | if (max_minus_one >= 0) { |
1026 | av_extend(av, max_minus_one); | |
84721d61 DM |
1027 | Copy(base, AvARRAY(av), max, SV*); |
1028 | } | |
99c9ca9e | 1029 | AvFILLp(av) = max_minus_one; |
84721d61 DM |
1030 | AvREIFY_off(av); |
1031 | AvREAL_on(av); | |
1032 | } | |
fe1bc4cf | 1033 | } |
84d4ea48 | 1034 | LEAVE; |
84721d61 | 1035 | PL_stack_sp = ORIGMARK + max; |
84d4ea48 JH |
1036 | return nextop; |
1037 | } | |
1038 | ||
1039 | static I32 | |
31e9e0a3 | 1040 | S_sortcv(pTHX_ SV *const a, SV *const b) |
84d4ea48 | 1041 | { |
901017d6 | 1042 | const I32 oldsaveix = PL_savestack_ix; |
84d4ea48 | 1043 | I32 result; |
ad021bfb | 1044 | PMOP * const pm = PL_curpm; |
a9ea019a | 1045 | COP * const cop = PL_curcop; |
16ada235 | 1046 | SV *olda, *oldb; |
7918f24d NC |
1047 | |
1048 | PERL_ARGS_ASSERT_SORTCV; | |
1049 | ||
16ada235 Z |
1050 | olda = GvSV(PL_firstgv); |
1051 | GvSV(PL_firstgv) = SvREFCNT_inc_simple_NN(a); | |
1052 | SvREFCNT_dec(olda); | |
1053 | oldb = GvSV(PL_secondgv); | |
1054 | GvSV(PL_secondgv) = SvREFCNT_inc_simple_NN(b); | |
1055 | SvREFCNT_dec(oldb); | |
84d4ea48 JH |
1056 | PL_stack_sp = PL_stack_base; |
1057 | PL_op = PL_sortcop; | |
1058 | CALLRUNOPS(aTHX); | |
a9ea019a | 1059 | PL_curcop = cop; |
33411212 DM |
1060 | /* entry zero of a stack is always PL_sv_undef, which |
1061 | * simplifies converting a '()' return into undef in scalar context */ | |
1062 | assert(PL_stack_sp > PL_stack_base || *PL_stack_base == &PL_sv_undef); | |
1063 | result = SvIV(*PL_stack_sp); | |
626ed49c | 1064 | |
53d3542d | 1065 | LEAVE_SCOPE(oldsaveix); |
ad021bfb | 1066 | PL_curpm = pm; |
84d4ea48 JH |
1067 | return result; |
1068 | } | |
1069 | ||
1070 | static I32 | |
31e9e0a3 | 1071 | S_sortcv_stacked(pTHX_ SV *const a, SV *const b) |
84d4ea48 | 1072 | { |
901017d6 | 1073 | const I32 oldsaveix = PL_savestack_ix; |
84d4ea48 | 1074 | I32 result; |
901017d6 | 1075 | AV * const av = GvAV(PL_defgv); |
ad021bfb | 1076 | PMOP * const pm = PL_curpm; |
a9ea019a | 1077 | COP * const cop = PL_curcop; |
84d4ea48 | 1078 | |
7918f24d NC |
1079 | PERL_ARGS_ASSERT_SORTCV_STACKED; |
1080 | ||
8f443ca6 | 1081 | if (AvREAL(av)) { |
7ea738a9 TK |
1082 | av_clear(av); |
1083 | AvREAL_off(av); | |
1084 | AvREIFY_on(av); | |
8f443ca6 | 1085 | } |
84d4ea48 | 1086 | if (AvMAX(av) < 1) { |
7ea738a9 TK |
1087 | SV **ary = AvALLOC(av); |
1088 | if (AvARRAY(av) != ary) { | |
1089 | AvMAX(av) += AvARRAY(av) - AvALLOC(av); | |
1090 | AvARRAY(av) = ary; | |
1091 | } | |
1092 | if (AvMAX(av) < 1) { | |
1093 | Renew(ary,2,SV*); | |
1094 | AvMAX(av) = 1; | |
1095 | AvARRAY(av) = ary; | |
1096 | AvALLOC(av) = ary; | |
1097 | } | |
84d4ea48 JH |
1098 | } |
1099 | AvFILLp(av) = 1; | |
1100 | ||
1101 | AvARRAY(av)[0] = a; | |
1102 | AvARRAY(av)[1] = b; | |
1103 | PL_stack_sp = PL_stack_base; | |
1104 | PL_op = PL_sortcop; | |
1105 | CALLRUNOPS(aTHX); | |
a9ea019a | 1106 | PL_curcop = cop; |
33411212 DM |
1107 | /* entry zero of a stack is always PL_sv_undef, which |
1108 | * simplifies converting a '()' return into undef in scalar context */ | |
1109 | assert(PL_stack_sp > PL_stack_base || *PL_stack_base == &PL_sv_undef); | |
1110 | result = SvIV(*PL_stack_sp); | |
626ed49c | 1111 | |
53d3542d | 1112 | LEAVE_SCOPE(oldsaveix); |
ad021bfb | 1113 | PL_curpm = pm; |
84d4ea48 JH |
1114 | return result; |
1115 | } | |
1116 | ||
1117 | static I32 | |
31e9e0a3 | 1118 | S_sortcv_xsub(pTHX_ SV *const a, SV *const b) |
84d4ea48 | 1119 | { |
20b7effb | 1120 | dSP; |
901017d6 | 1121 | const I32 oldsaveix = PL_savestack_ix; |
ea726b52 | 1122 | CV * const cv=MUTABLE_CV(PL_sortcop); |
84d4ea48 | 1123 | I32 result; |
ad021bfb | 1124 | PMOP * const pm = PL_curpm; |
84d4ea48 | 1125 | |
7918f24d NC |
1126 | PERL_ARGS_ASSERT_SORTCV_XSUB; |
1127 | ||
84d4ea48 JH |
1128 | SP = PL_stack_base; |
1129 | PUSHMARK(SP); | |
1130 | EXTEND(SP, 2); | |
1131 | *++SP = a; | |
1132 | *++SP = b; | |
1133 | PUTBACK; | |
1134 | (void)(*CvXSUB(cv))(aTHX_ cv); | |
33411212 DM |
1135 | /* entry zero of a stack is always PL_sv_undef, which |
1136 | * simplifies converting a '()' return into undef in scalar context */ | |
1137 | assert(PL_stack_sp > PL_stack_base || *PL_stack_base == &PL_sv_undef); | |
84d4ea48 | 1138 | result = SvIV(*PL_stack_sp); |
33411212 | 1139 | |
53d3542d | 1140 | LEAVE_SCOPE(oldsaveix); |
ad021bfb | 1141 | PL_curpm = pm; |
84d4ea48 JH |
1142 | return result; |
1143 | } | |
1144 | ||
1145 | ||
044d25c7 | 1146 | PERL_STATIC_FORCE_INLINE I32 |
31e9e0a3 | 1147 | S_sv_ncmp(pTHX_ SV *const a, SV *const b) |
84d4ea48 | 1148 | { |
427fbfe8 | 1149 | I32 cmp = do_ncmp(a, b); |
7918f24d NC |
1150 | |
1151 | PERL_ARGS_ASSERT_SV_NCMP; | |
1152 | ||
427fbfe8 | 1153 | if (cmp == 2) { |
7ea738a9 TK |
1154 | if (ckWARN(WARN_UNINITIALIZED)) report_uninit(NULL); |
1155 | return 0; | |
f3dab52a | 1156 | } |
427fbfe8 TC |
1157 | |
1158 | return cmp; | |
84d4ea48 JH |
1159 | } |
1160 | ||
044d25c7 TK |
1161 | PERL_STATIC_FORCE_INLINE I32 |
1162 | S_sv_ncmp_desc(pTHX_ SV *const a, SV *const b) | |
1163 | { | |
1164 | PERL_ARGS_ASSERT_SV_NCMP_DESC; | |
1165 | ||
1166 | return -S_sv_ncmp(aTHX_ a, b); | |
1167 | } | |
1168 | ||
1169 | PERL_STATIC_FORCE_INLINE I32 | |
31e9e0a3 | 1170 | S_sv_i_ncmp(pTHX_ SV *const a, SV *const b) |
84d4ea48 | 1171 | { |
901017d6 AL |
1172 | const IV iv1 = SvIV(a); |
1173 | const IV iv2 = SvIV(b); | |
7918f24d NC |
1174 | |
1175 | PERL_ARGS_ASSERT_SV_I_NCMP; | |
1176 | ||
84d4ea48 JH |
1177 | return iv1 < iv2 ? -1 : iv1 > iv2 ? 1 : 0; |
1178 | } | |
901017d6 | 1179 | |
044d25c7 TK |
1180 | PERL_STATIC_FORCE_INLINE I32 |
1181 | S_sv_i_ncmp_desc(pTHX_ SV *const a, SV *const b) | |
1182 | { | |
1183 | PERL_ARGS_ASSERT_SV_I_NCMP_DESC; | |
1184 | ||
1185 | return -S_sv_i_ncmp(aTHX_ a, b); | |
1186 | } | |
1187 | ||
901017d6 | 1188 | #define tryCALL_AMAGICbin(left,right,meth) \ |
79a8d529 | 1189 | (SvAMAGIC(left)||SvAMAGIC(right)) \ |
7ea738a9 TK |
1190 | ? amagic_call(left, right, meth, 0) \ |
1191 | : NULL; | |
84d4ea48 | 1192 | |
659c4b96 | 1193 | #define SORT_NORMAL_RETURN_VALUE(val) (((val) > 0) ? 1 : ((val) ? -1 : 0)) |
eeb9de02 | 1194 | |
044d25c7 | 1195 | PERL_STATIC_FORCE_INLINE I32 |
5aaab254 | 1196 | S_amagic_ncmp(pTHX_ SV *const a, SV *const b) |
84d4ea48 | 1197 | { |
31d632c3 | 1198 | SV * const tmpsv = tryCALL_AMAGICbin(a,b,ncmp_amg); |
7918f24d NC |
1199 | |
1200 | PERL_ARGS_ASSERT_AMAGIC_NCMP; | |
1201 | ||
84d4ea48 | 1202 | if (tmpsv) { |
84d4ea48 | 1203 | if (SvIOK(tmpsv)) { |
901017d6 | 1204 | const I32 i = SvIVX(tmpsv); |
eeb9de02 | 1205 | return SORT_NORMAL_RETURN_VALUE(i); |
84d4ea48 | 1206 | } |
7ea738a9 TK |
1207 | else { |
1208 | const NV d = SvNV(tmpsv); | |
1209 | return SORT_NORMAL_RETURN_VALUE(d); | |
1210 | } | |
84d4ea48 | 1211 | } |
f0f5dc9d | 1212 | return S_sv_ncmp(aTHX_ a, b); |
84d4ea48 JH |
1213 | } |
1214 | ||
044d25c7 TK |
1215 | PERL_STATIC_FORCE_INLINE I32 |
1216 | S_amagic_ncmp_desc(pTHX_ SV *const a, SV *const b) | |
1217 | { | |
1218 | PERL_ARGS_ASSERT_AMAGIC_NCMP_DESC; | |
1219 | ||
1220 | return -S_amagic_ncmp(aTHX_ a, b); | |
1221 | } | |
1222 | ||
1223 | PERL_STATIC_FORCE_INLINE I32 | |
5aaab254 | 1224 | S_amagic_i_ncmp(pTHX_ SV *const a, SV *const b) |
84d4ea48 | 1225 | { |
31d632c3 | 1226 | SV * const tmpsv = tryCALL_AMAGICbin(a,b,ncmp_amg); |
7918f24d NC |
1227 | |
1228 | PERL_ARGS_ASSERT_AMAGIC_I_NCMP; | |
1229 | ||
84d4ea48 | 1230 | if (tmpsv) { |
84d4ea48 | 1231 | if (SvIOK(tmpsv)) { |
901017d6 | 1232 | const I32 i = SvIVX(tmpsv); |
eeb9de02 | 1233 | return SORT_NORMAL_RETURN_VALUE(i); |
84d4ea48 | 1234 | } |
7ea738a9 TK |
1235 | else { |
1236 | const NV d = SvNV(tmpsv); | |
1237 | return SORT_NORMAL_RETURN_VALUE(d); | |
1238 | } | |
84d4ea48 | 1239 | } |
f0f5dc9d | 1240 | return S_sv_i_ncmp(aTHX_ a, b); |
84d4ea48 JH |
1241 | } |
1242 | ||
044d25c7 TK |
1243 | PERL_STATIC_FORCE_INLINE I32 |
1244 | S_amagic_i_ncmp_desc(pTHX_ SV *const a, SV *const b) | |
1245 | { | |
1246 | PERL_ARGS_ASSERT_AMAGIC_I_NCMP_DESC; | |
1247 | ||
1248 | return -S_amagic_i_ncmp(aTHX_ a, b); | |
1249 | } | |
1250 | ||
1251 | PERL_STATIC_FORCE_INLINE I32 | |
5aaab254 | 1252 | S_amagic_cmp(pTHX_ SV *const str1, SV *const str2) |
84d4ea48 | 1253 | { |
31d632c3 | 1254 | SV * const tmpsv = tryCALL_AMAGICbin(str1,str2,scmp_amg); |
7918f24d NC |
1255 | |
1256 | PERL_ARGS_ASSERT_AMAGIC_CMP; | |
1257 | ||
84d4ea48 | 1258 | if (tmpsv) { |
84d4ea48 | 1259 | if (SvIOK(tmpsv)) { |
901017d6 | 1260 | const I32 i = SvIVX(tmpsv); |
eeb9de02 | 1261 | return SORT_NORMAL_RETURN_VALUE(i); |
84d4ea48 | 1262 | } |
7ea738a9 TK |
1263 | else { |
1264 | const NV d = SvNV(tmpsv); | |
1265 | return SORT_NORMAL_RETURN_VALUE(d); | |
1266 | } | |
84d4ea48 JH |
1267 | } |
1268 | return sv_cmp(str1, str2); | |
1269 | } | |
1270 | ||
044d25c7 TK |
1271 | PERL_STATIC_FORCE_INLINE I32 |
1272 | S_amagic_cmp_desc(pTHX_ SV *const str1, SV *const str2) | |
1273 | { | |
1274 | PERL_ARGS_ASSERT_AMAGIC_CMP_DESC; | |
1275 | ||
1276 | return -S_amagic_cmp(aTHX_ str1, str2); | |
1277 | } | |
1278 | ||
1279 | PERL_STATIC_FORCE_INLINE I32 | |
1280 | S_cmp_desc(pTHX_ SV *const str1, SV *const str2) | |
1281 | { | |
1282 | PERL_ARGS_ASSERT_CMP_DESC; | |
1283 | ||
1284 | return -sv_cmp(str1, str2); | |
1285 | } | |
1286 | ||
91191cf7 KW |
1287 | #ifdef USE_LOCALE_COLLATE |
1288 | ||
044d25c7 | 1289 | PERL_STATIC_FORCE_INLINE I32 |
5aaab254 | 1290 | S_amagic_cmp_locale(pTHX_ SV *const str1, SV *const str2) |
84d4ea48 | 1291 | { |
31d632c3 | 1292 | SV * const tmpsv = tryCALL_AMAGICbin(str1,str2,scmp_amg); |
7918f24d NC |
1293 | |
1294 | PERL_ARGS_ASSERT_AMAGIC_CMP_LOCALE; | |
1295 | ||
84d4ea48 | 1296 | if (tmpsv) { |
84d4ea48 | 1297 | if (SvIOK(tmpsv)) { |
901017d6 | 1298 | const I32 i = SvIVX(tmpsv); |
eeb9de02 | 1299 | return SORT_NORMAL_RETURN_VALUE(i); |
84d4ea48 | 1300 | } |
7ea738a9 TK |
1301 | else { |
1302 | const NV d = SvNV(tmpsv); | |
1303 | return SORT_NORMAL_RETURN_VALUE(d); | |
1304 | } | |
84d4ea48 JH |
1305 | } |
1306 | return sv_cmp_locale(str1, str2); | |
1307 | } | |
241d1a3b | 1308 | |
044d25c7 TK |
1309 | PERL_STATIC_FORCE_INLINE I32 |
1310 | S_amagic_cmp_locale_desc(pTHX_ SV *const str1, SV *const str2) | |
1311 | { | |
1312 | PERL_ARGS_ASSERT_AMAGIC_CMP_LOCALE_DESC; | |
1313 | ||
1314 | return -S_amagic_cmp_locale(aTHX_ str1, str2); | |
1315 | } | |
1316 | ||
1317 | PERL_STATIC_FORCE_INLINE I32 | |
1318 | S_cmp_locale_desc(pTHX_ SV *const str1, SV *const str2) | |
1319 | { | |
1320 | PERL_ARGS_ASSERT_CMP_LOCALE_DESC; | |
1321 | ||
1322 | return -sv_cmp_locale(str1, str2); | |
1323 | } | |
1324 | ||
91191cf7 KW |
1325 | #endif |
1326 | ||
241d1a3b | 1327 | /* |
14d04a33 | 1328 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 1329 | */ |