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Side by Side Diff: third_party/libxml/src/timsort.h

Issue 2792873002: Roll libxml to e905f08123e4a6e7731549e6f09dadff4cab65bd (Closed)
Patch Set: Created 3 years, 8 months ago
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1 /* 1 /*
2 * taken from https://github.com/swenson/sort 2 * taken from https://github.com/swenson/sort
3 * Kept as is for the moment to be able to apply upstream patches for that 3 * Kept as is for the moment to be able to apply upstream patches for that
4 * code, currently used only to speed up XPath node sorting, see xpath.c 4 * code, currently used only to speed up XPath node sorting, see xpath.c
5 */ 5 */
6 6
7 /* 7 /*
8 * All code in this header, unless otherwise specified, is hereby licensed under the MIT Public License: 8 * All code in this header, unless otherwise specified, is hereby licensed under the MIT Public License:
9 9
10 Copyright (c) 2010 Christopher Swenson 10 Copyright (c) 2010 Christopher Swenson
(...skipping 305 matching lines...) Expand 10 before | Expand all | Expand 10 after
316 } TEMP_STORAGE_T; 316 } TEMP_STORAGE_T;
317 317
318 318
319 static void TIM_SORT_RESIZE(TEMP_STORAGE_T *store, const size_t new_size) 319 static void TIM_SORT_RESIZE(TEMP_STORAGE_T *store, const size_t new_size)
320 { 320 {
321 if (store->alloc < new_size) 321 if (store->alloc < new_size)
322 { 322 {
323 SORT_TYPE *tempstore = (SORT_TYPE *)realloc(store->storage, new_size * sizeo f(SORT_TYPE)); 323 SORT_TYPE *tempstore = (SORT_TYPE *)realloc(store->storage, new_size * sizeo f(SORT_TYPE));
324 if (tempstore == NULL) 324 if (tempstore == NULL)
325 { 325 {
326 fprintf(stderr, "Error allocating temporary storage for tim sort: need %ll u bytes", (unsigned long long)(sizeof(SORT_TYPE) * new_size)); 326 fprintf(stderr, "Error allocating temporary storage for tim sort: need %lu bytes", (unsigned long) (sizeof(SORT_TYPE) * new_size));
327 exit(1); 327 exit(1);
328 } 328 }
329 store->storage = tempstore; 329 store->storage = tempstore;
330 store->alloc = new_size; 330 store->alloc = new_size;
331 } 331 }
332 } 332 }
333 333
334 static void TIM_SORT_MERGE(SORT_TYPE *dst, const TIM_SORT_RUN_T *stack, const in t stack_curr, TEMP_STORAGE_T *store) 334 static void TIM_SORT_MERGE(SORT_TYPE *dst, const TIM_SORT_RUN_T *stack, const in t stack_curr, TEMP_STORAGE_T *store)
335 { 335 {
336 const int64_t A = stack[stack_curr - 2].length; 336 const int64_t A = stack[stack_curr - 2].length;
(...skipping 50 matching lines...) Expand 10 before | Expand all | Expand 10 after
387 else 387 else
388 dst[k] = dst[j--]; 388 dst[k] = dst[j--];
389 } 389 }
390 } 390 }
391 } 391 }
392 392
393 static int TIM_SORT_COLLAPSE(SORT_TYPE *dst, TIM_SORT_RUN_T *stack, int stack_cu rr, TEMP_STORAGE_T *store, const size_t size) 393 static int TIM_SORT_COLLAPSE(SORT_TYPE *dst, TIM_SORT_RUN_T *stack, int stack_cu rr, TEMP_STORAGE_T *store, const size_t size)
394 { 394 {
395 while (1) { 395 while (1) {
396 int64_t A, B, C, D; 396 int64_t A, B, C, D;
397 int ABC, BCD, BD, CD; 397 int ABC, BCD, CD;
398 398
399 /* if the stack only has one thing on it, we are done with the collapse */ 399 /* if the stack only has one thing on it, we are done with the collapse */
400 if (stack_curr <= 1) { 400 if (stack_curr <= 1) {
401 break; 401 break;
402 } 402 }
403 403
404 /* if this is the last merge, just do it */ 404 /* if this is the last merge, just do it */
405 if ((stack_curr == 2) && (stack[0].length + stack[1].length == size)) { 405 if ((stack_curr == 2) && (stack[0].length + stack[1].length == size)) {
406 TIM_SORT_MERGE(dst, stack, stack_curr, store); 406 TIM_SORT_MERGE(dst, stack, stack_curr, store);
407 stack[0].length += stack[1].length; 407 stack[0].length += stack[1].length;
(...skipping 16 matching lines...) Expand all
424 424
425 if (stack_curr >= 4) { 425 if (stack_curr >= 4) {
426 A = stack[stack_curr - 4].length; 426 A = stack[stack_curr - 4].length;
427 ABC = (A <= B + C); 427 ABC = (A <= B + C);
428 } else { 428 } else {
429 ABC = 0; 429 ABC = 0;
430 } 430 }
431 431
432 BCD = (B <= C + D) || ABC; 432 BCD = (B <= C + D) || ABC;
433 CD = (C <= D); 433 CD = (C <= D);
434 BD = (B < D);
435 434
436 /* Both invariants are good */ 435 /* Both invariants are good */
437 if (!BCD && !CD) { 436 if (!BCD && !CD) {
438 break; 437 break;
439 } 438 }
440 439
441 /* left merge */ 440 /* left merge */
442 if (BCD && !CD) { 441 if (BCD && !CD) {
443 TIM_SORT_MERGE(dst, stack, stack_curr - 1, store); 442 TIM_SORT_MERGE(dst, stack, stack_curr - 1, store);
444 stack[stack_curr - 3].length += stack[stack_curr - 2].length; 443 stack[stack_curr - 3].length += stack[stack_curr - 2].length;
(...skipping 64 matching lines...) Expand 10 before | Expand all | Expand 10 after
509 #undef BINARY_INSERTION_FIND 508 #undef BINARY_INSERTION_FIND
510 #undef BINARY_INSERTION_SORT_START 509 #undef BINARY_INSERTION_SORT_START
511 #undef BINARY_INSERTION_SORT 510 #undef BINARY_INSERTION_SORT
512 #undef REVERSE_ELEMENTS 511 #undef REVERSE_ELEMENTS
513 #undef COUNT_RUN 512 #undef COUNT_RUN
514 #undef TIM_SORT 513 #undef TIM_SORT
515 #undef TIM_SORT_RESIZE 514 #undef TIM_SORT_RESIZE
516 #undef TIM_SORT_COLLAPSE 515 #undef TIM_SORT_COLLAPSE
517 #undef TIM_SORT_RUN_T 516 #undef TIM_SORT_RUN_T
518 #undef TEMP_STORAGE_T 517 #undef TEMP_STORAGE_T
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