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taosdata / TDengine / #4000

06 May 2025 10:12PM UTC coverage: 62.312% (-0.1%) from 62.455%
#4000

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GitHub
Merge pull request #30938 from taosdata/fix/taosdCmdArgs

154947 of 317399 branches covered (48.82%)

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240052 of 316504 relevant lines covered (75.84%)

6198297.95 hits per line

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83.69
/source/util/src/tarray.c
1
/*
2
 * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
3
 *
4
 * This program is free software: you can use, redistribute, and/or modify
5
 * it under the terms of the GNU Affero General Public License, version 3
6
 * or later ("AGPL"), as published by the Free Software Foundation.
7
 *
8
 * This program is distributed in the hope that it will be useful, but WITHOUT
9
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10
 * FITNESS FOR A PARTICULAR PURPOSE.
11
 *
12
 * You should have received a copy of the GNU Affero General Public License
13
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
14
 */
15

16
#define _DEFAULT_SOURCE
17
#include "tarray.h"
18
#include "tcoding.h"
19

20
// todo refactor API
21
#define BOUNDARY_SIZE         1024 * 1024 * 1024  // 1G
22
#define BOUNDARY_SMALL_FACTOR 1.2
23
#define BOUNDARY_BIG_FACTOR   2
24

25
SArray* taosArrayInit(size_t size, size_t elemSize) {
432,071,732✔
26
  if (elemSize == 0) {
432,071,732✔
27
    terrno = TSDB_CODE_INVALID_PARA;
1✔
28
    return NULL;
1✔
29
  }
30

31
  if (size < TARRAY_MIN_SIZE) {
432,071,731✔
32
    size = TARRAY_MIN_SIZE;
96,356,240✔
33
  }
34

35
  SArray* pArray = taosMemoryMalloc(sizeof(SArray));
432,071,731!
36
  if (pArray == NULL) {
431,971,658!
37
    return NULL;
×
38
  }
39

40
  pArray->size = 0;
431,971,658✔
41
  pArray->pData = taosMemoryCalloc(size, elemSize);
431,971,658!
42
  if (pArray->pData == NULL) {
432,264,071!
43
    taosMemoryFree(pArray);
×
44
    return NULL;
×
45
  }
46

47
  pArray->capacity = size;
432,264,071✔
48
  pArray->elemSize = elemSize;
432,264,071✔
49
  return pArray;
432,264,071✔
50
}
51

52
SArray* taosArrayInit_s(size_t elemSize, size_t initialSize) {
661,705✔
53
  SArray* pArray = taosMemoryMalloc(sizeof(SArray));
661,705!
54
  if (pArray == NULL) {
664,717!
55
    return NULL;
×
56
  }
57

58
  pArray->size = initialSize;
664,717✔
59
  pArray->pData = taosMemoryCalloc(initialSize, elemSize);
664,717!
60
  if (pArray->pData == NULL) {
664,393!
61
    taosMemoryFree(pArray);
×
62
    return NULL;
×
63
  }
64

65
  pArray->capacity = initialSize;
664,393✔
66
  pArray->elemSize = elemSize;
664,393✔
67
  return pArray;
664,393✔
68
}
69

70
static int32_t taosArrayResize(SArray* pArray) {
14✔
71
  size_t size = pArray->capacity;
14✔
72
  size = (size << 1u);
14✔
73

74
  void* tmp = taosMemoryRealloc(pArray->pData, size * pArray->elemSize);
14!
75
  if (tmp == NULL) {  // reallocate failed, the original buffer remains
14!
76
    return terrno;
×
77
  }
78

79
  pArray->pData = tmp;
14✔
80
  pArray->capacity = size;
14✔
81

82
  return 0;
14✔
83
}
84

85
int32_t taosArrayEnsureCap(SArray* pArray, size_t newCap) {
2,147,483,647✔
86
  if (newCap > pArray->capacity) {
2,147,483,647✔
87
    float factor = BOUNDARY_BIG_FACTOR;
9,566,790✔
88
    if (newCap * pArray->elemSize > BOUNDARY_SIZE) {
9,566,790!
89
      factor = BOUNDARY_SMALL_FACTOR;
×
90
    }
91

92
    size_t tsize = (pArray->capacity * factor);
9,566,790✔
93
    while (newCap > tsize) {
9,671,748✔
94
      size_t newSize = (tsize * factor);
104,958✔
95
      tsize = (newSize == tsize) ? (tsize + 2) : newSize;
104,958!
96
    }
97

98
    char* p = taosMemoryRealloc(pArray->pData, tsize * pArray->elemSize);
9,566,790!
99
    if (p == NULL) {
9,583,313!
100
      return terrno;
×
101
    }
102

103
    pArray->pData = p;
9,583,313✔
104
    pArray->capacity = tsize;
9,583,313✔
105
  }
106
  return 0;
2,147,483,647✔
107
}
108

109
void* taosArrayAddBatch(SArray* pArray, const void* pData, int32_t nEles) {
2,077,089,950✔
110
  if (pData == NULL) {
2,077,089,950✔
111
    terrno = TSDB_CODE_INVALID_PARA;
1✔
112
    return NULL;
1✔
113
  }
114

115
  int32_t code = taosArrayEnsureCap(pArray, pArray->size + nEles);
2,077,089,949✔
116
  if (code) {
2,070,656,065!
117
    terrno = code;
×
118
    return NULL;
×
119
  }
120

121
  void* dst = TARRAY_GET_ELEM(pArray, pArray->size);
2,090,910,551✔
122
  memcpy(dst, pData, pArray->elemSize * nEles);
2,090,910,551✔
123

124
  pArray->size += nEles;
2,090,910,551✔
125
  return dst;
2,090,910,551✔
126
}
127

128
void taosArrayRemoveDuplicate(SArray* pArray, __compar_fn_t comparFn, void (*fp)(void*)) {
46,993✔
129
  size_t size = pArray->size;
46,993✔
130
  if (size <= 1) {
46,993✔
131
    return;
40,880✔
132
  }
133

134
  int32_t pos = 0;
6,113✔
135
  for (int32_t i = 1; i < size; ++i) {
628,482✔
136
    char* p1 = taosArrayGet(pArray, pos);
622,368✔
137
    char* p2 = taosArrayGet(pArray, i);
622,368✔
138

139
    if (comparFn(p1, p2) == 0) {
622,368✔
140
      // do nothing
141
    } else {
142
      if (pos + 1 != i) {
525,745✔
143
        void* p = taosArrayGet(pArray, pos + 1);
14,410✔
144
        if (fp != NULL) {
14,410✔
145
          fp(p);
3✔
146
        }
147

148
        taosArraySet(pArray, pos + 1, p2);
14,410✔
149
        memset(TARRAY_GET_ELEM(pArray, i), 0, pArray->elemSize);
14,410✔
150
        pos += 1;
14,410✔
151
      } else {
152
        pos += 1;
511,335✔
153
      }
154
    }
155
  }
156

157
  if (fp != NULL) {
6,114✔
158
    for (int32_t i = pos + 1; i < pArray->size; ++i) {
98✔
159
      void* p = taosArrayGet(pArray, i);
11✔
160
      fp(p);
11✔
161
    }
162
  }
163

164
  pArray->size = pos + 1;
6,156✔
165
}
166

167
void* taosArrayAddAll(SArray* pArray, const SArray* pInput) {
366,929✔
168
  if (pInput) {
366,929✔
169
    return taosArrayAddBatch(pArray, pInput->pData, (int32_t)taosArrayGetSize(pInput));
356,937✔
170
  } else {
171
    terrno = TSDB_CODE_INVALID_PARA;
9,992✔
172
    return NULL;
10,040✔
173
  }
174
}
175

176
void* taosArrayReserve(SArray* pArray, int32_t num) {
352,785,397✔
177
  int32_t code = taosArrayEnsureCap(pArray, pArray->size + num);
352,785,397✔
178
  if (code) {
352,468,968!
179
    terrno = code;
×
180
    return NULL;
×
181
  }
182

183
  void* dst = TARRAY_GET_ELEM(pArray, pArray->size);
352,639,785✔
184
  pArray->size += num;
352,639,785✔
185

186
  memset(dst, 0, num * pArray->elemSize);
352,639,785✔
187

188
  return dst;
352,639,785✔
189
}
190

191
void* taosArrayPop(SArray* pArray) {
20,881,514✔
192
  if (pArray->size == 0) {
20,881,514✔
193
    return NULL;
156,934✔
194
  }
195

196
  pArray->size -= 1;
20,724,580✔
197
  return TARRAY_GET_ELEM(pArray, pArray->size);
20,724,580✔
198
}
199

200
void* taosArrayGet(const SArray* pArray, size_t index) {
2,147,483,647✔
201
  if (NULL == pArray) {
2,147,483,647✔
202
    terrno = TSDB_CODE_INVALID_PARA;
52✔
203
    uError("failed to return value from array of null ptr");
52!
204
    return NULL;
52✔
205
  }
206

207
  if (index >= pArray->size) {
2,147,483,647✔
208
    uError("index is out of range, current:%" PRIzu " max:%" PRIzu, index, pArray->size);
3,260!
209
    terrno = TSDB_CODE_OUT_OF_RANGE;
3,260✔
210
    return NULL;
3,260✔
211
  }
212

213
  return TARRAY_GET_ELEM(pArray, index);
2,147,483,647✔
214
}
215

216
void* taosArrayGetP(const SArray* pArray, size_t index) {
628,962,576✔
217
  void** p = taosArrayGet(pArray, index);
628,962,576✔
218
  if (p == NULL) {
626,877,068✔
219
    return NULL;
1✔
220
  }
221
  return *p;
626,877,067✔
222
}
223

224
void* taosArrayGetLast(const SArray* pArray) {
67,279,267✔
225
  if (pArray->size == 0) {
67,279,267✔
226
    terrno = TSDB_CODE_INVALID_PARA;
1✔
227
    return NULL;
1✔
228
  }
229

230
  return TARRAY_GET_ELEM(pArray, pArray->size - 1);
67,279,266✔
231
}
232

233
size_t taosArrayGetSize(const SArray* pArray) {
2,147,483,647✔
234
  if (pArray == NULL) {
2,147,483,647✔
235
    return 0;
72,141,563✔
236
  }
237
  return TARRAY_SIZE(pArray);
2,147,483,647✔
238
}
239

240
void* taosArrayInsert(SArray* pArray, size_t index, const void* pData) {
9,417,579✔
241
  if (pArray == NULL || pData == NULL) {
9,417,579!
242
    terrno = TSDB_CODE_INVALID_PARA;
×
243
    return NULL;
1✔
244
  }
245

246
  if (index >= pArray->size) {
9,417,594✔
247
    return taosArrayPush(pArray, pData);
9,416,254✔
248
  }
249

250
  if (pArray->size >= pArray->capacity) {
1,316✔
251
    int32_t ret = taosArrayResize(pArray);
14✔
252
    if (ret < 0) {
14!
253
      terrno = ret;
×
254
      return NULL;
×
255
    }
256
  }
257

258
  void* dst = TARRAY_GET_ELEM(pArray, index);
1,318✔
259

260
  int32_t remain = (int32_t)(pArray->size - index);
1,318✔
261
  memmove((char*)dst + pArray->elemSize, (char*)dst, pArray->elemSize * remain);
1,318✔
262
  memcpy(dst, pData, pArray->elemSize);
1,318✔
263

264
  pArray->size += 1;
1,318✔
265

266
  return dst;
1,318✔
267
}
268

269
void taosArraySet(SArray* pArray, size_t index, void* pData) {
26,418,231✔
270
  if (index < pArray->size) {
26,418,231!
271
    memcpy(TARRAY_GET_ELEM(pArray, index), pData, pArray->elemSize);
26,422,640✔
272
  }
273
}
26,418,231✔
274

275
void taosArrayPopFrontBatch(SArray* pArray, size_t cnt) {
22,547✔
276
  if (cnt > pArray->size) {
22,547✔
277
    cnt = pArray->size;
1✔
278
  }
279

280
  pArray->size = pArray->size - cnt;
22,547✔
281
  if (pArray->size == 0 || cnt == 0) {
22,547✔
282
    return;
22,490✔
283
  }
284
  memmove(pArray->pData, (char*)pArray->pData + cnt * pArray->elemSize, pArray->size * pArray->elemSize);
57✔
285
}
286

287
void taosArrayPopTailBatch(SArray* pArray, size_t cnt) {
100,143✔
288
  if (cnt >= pArray->size) {
100,143✔
289
    cnt = pArray->size;
64,175✔
290
  }
291

292
  pArray->size = pArray->size - cnt;
100,143✔
293
}
100,143✔
294

295
void taosArrayRemove(SArray* pArray, size_t index) {
3,975,809✔
296
  if (!(index < pArray->size)) {
3,975,809!
297
    return;
×
298
  }
299

300
  if (index == pArray->size - 1) {
3,975,809✔
301
    void* t = taosArrayPop(pArray);
947,077✔
302
    return;
947,072✔
303
  }
304

305
  size_t remain = pArray->size - index - 1;
3,028,732✔
306
  memmove((char*)pArray->pData + index * pArray->elemSize, (char*)pArray->pData + (index + 1) * pArray->elemSize,
3,028,732✔
307
          remain * pArray->elemSize);
3,028,732✔
308
  pArray->size -= 1;
3,028,732✔
309
}
310

311
void taosArrayRemoveBatch(SArray* pArray, size_t index, size_t num, FDelete fp) {
185,308✔
312
  if (index + num <= pArray->size) {
185,308!
313
    if (fp) {
185,323✔
314
      for (int32_t i = 0; i < num; i++) {
366,705✔
315
        fp(taosArrayGet(pArray, index + i));
183,746✔
316
      }
317
    }
318

319
    memmove((char*)pArray->pData + index * pArray->elemSize, (char*)pArray->pData + (index + num) * pArray->elemSize,
185,323✔
320
            (pArray->size - index - num) * pArray->elemSize);
185,323✔
321
    pArray->size -= num;
185,323✔
322
  }
323
}
185,308✔
324

325
SArray* taosArrayFromList(const void* src, size_t size, size_t elemSize) {
1✔
326
  if (elemSize <= 0) {
1!
327
    terrno = TSDB_CODE_INVALID_PARA;
×
328
    return NULL;
×
329
  }
330

331
  SArray* pDst = taosArrayInit(size, elemSize);
1✔
332
  if (pDst) {
1!
333
    memcpy(pDst->pData, src, elemSize * size);
1✔
334
    pDst->size = size;
1✔
335
  }
336

337
  return pDst;
1✔
338
}
339

340
SArray* taosArrayDup(const SArray* pSrc, __array_item_dup_fn_t fn) {
3,336,707✔
341
  if (NULL == pSrc) {
3,336,707✔
342
    terrno = TSDB_CODE_INVALID_PARA;
9,709✔
343
    return NULL;
9,709✔
344
  }
345

346
  if (pSrc->size == 0) {  // empty array list
3,326,998✔
347
    return taosArrayInit(8, pSrc->elemSize);
59,913✔
348
  }
349

350
  SArray* dst = taosArrayInit(pSrc->size, pSrc->elemSize);
3,267,085✔
351

352
  if (dst) {
3,267,599!
353
    if (fn == NULL) {
3,267,617✔
354
      memcpy(dst->pData, pSrc->pData, pSrc->elemSize * pSrc->size);
3,266,203✔
355
    } else {
356
      for (int32_t i = 0; i < pSrc->size; ++i) {
3,746✔
357
        void* p = fn(taosArrayGetP(pSrc, i));
2,370✔
358
        memcpy(((char*)dst->pData) + i * dst->elemSize, &p, dst->elemSize);
2,332✔
359
      }
360
    }
361

362
    dst->size = pSrc->size;
3,267,579✔
363
  }
364

365
  return dst;
3,267,561✔
366
}
367

368
void taosArrayClear(SArray* pArray) {
244,339,787✔
369
  if (pArray == NULL) return;
244,339,787✔
370
  pArray->size = 0;
216,749,144✔
371
}
372

373
void taosArrayClearEx(SArray* pArray, void (*fp)(void*)) {
4,419,239✔
374
  if (pArray == NULL) return;
4,419,239!
375
  if (fp == NULL) {
4,419,239✔
376
    pArray->size = 0;
1✔
377
    return;
1✔
378
  }
379

380
  for (int32_t i = 0; i < pArray->size; ++i) {
133,872,021✔
381
    fp(TARRAY_GET_ELEM(pArray, i));
129,452,757✔
382
  }
383

384
  pArray->size = 0;
4,419,264✔
385
}
386
void taosArrayClearP(SArray* pArray, void (*fp)(void*)) {
673✔
387
  // if (pArray == NULL) return;
388
  // if (fp == NULL) {
389
  //   pArray->size = 0;
390
  //   return;
391
  // }
392

393
  // for (int32_t i = 0; i < pArray->size; ++i) {
394
  //   fp(TARRAY_GET_ELEM(pArray, i));
395
  // }
396
  if (pArray) {
673!
397
    if (NULL == fp) {
673!
398
      for (int32_t i = 0; i < pArray->size; i++) {
690✔
399
        taosMemoryFree(*(void**)TARRAY_GET_ELEM(pArray, i));
17!
400
      }
401
    } else {
402
      for (int32_t i = 0; i < pArray->size; i++) {
×
403
        fp(*(void**)TARRAY_GET_ELEM(pArray, i));
×
404
      }
405
    }
406
  }
407
  taosArrayClear(pArray);
673✔
408
}
673✔
409

410
void taosArrayDestroy(SArray* pArray) {
768,138,381✔
411
  if (pArray) {
768,138,381✔
412
    taosMemoryFree(pArray->pData);
432,872,097!
413
    taosMemoryFree(pArray);
433,140,245!
414
  }
415
}
768,221,847✔
416

417
void taosArrayDestroyP(SArray* pArray, FDelete fp) {
158,526,952✔
418
  if (pArray) {
158,526,952✔
419
    if (NULL == fp) {
137,700,629✔
420
      for (int32_t i = 0; i < pArray->size; i++) {
7,262,265✔
421
        taosMemoryFree(*(void**)TARRAY_GET_ELEM(pArray, i));
2,291,361!
422
      }
423
    } else {
424
      for (int32_t i = 0; i < pArray->size; i++) {
264,002,203✔
425
        fp(*(void**)TARRAY_GET_ELEM(pArray, i));
131,271,999✔
426
      }
427
    }
428
    taosArrayDestroy(pArray);
137,701,108✔
429
  }
430
}
158,527,451✔
431

432
void taosArrayDestroyEx(SArray* pArray, FDelete fp) {
67,890,745✔
433
  if (pArray == NULL) {
67,890,745✔
434
    return;
40,480,037✔
435
  }
436

437
  if (fp == NULL) {
27,410,708✔
438
    taosArrayDestroy(pArray);
488,902✔
439
    return;
488,910✔
440
  }
441

442
  for (int32_t i = 0; i < pArray->size; ++i) {
119,948,991✔
443
    fp(TARRAY_GET_ELEM(pArray, i));
93,036,569✔
444
  }
445

446
  taosArrayDestroy(pArray);
26,912,422✔
447
}
448

449
void taosArraySort(SArray* pArray, __compar_fn_t compar) {
4,416,843✔
450
  taosSort(pArray->pData, pArray->size, pArray->elemSize, compar);
4,416,843✔
451
}
4,416,864✔
452

453
int32_t taosArrayMSort(SArray* pArray, __compar_fn_t compar) {
37,176✔
454
  return taosMergeSort(pArray->pData, pArray->size, pArray->elemSize, compar);
37,176✔
455
}
456

457
void* taosArraySearch(const SArray* pArray, const void* key, __compar_fn_t comparFn, int32_t flags) {
6,991,258✔
458
  return taosbsearch(key, pArray->pData, pArray->size, pArray->elemSize, comparFn, flags);
6,991,258✔
459
}
460

461
int32_t taosArraySearchIdx(const SArray* pArray, const void* key, __compar_fn_t comparFn, int32_t flags) {
3,146,311✔
462
  void* item = taosArraySearch(pArray, key, comparFn, flags);
3,146,311✔
463
  return item == NULL ? -1 : (int32_t)((char*)item - (char*)pArray->pData) / pArray->elemSize;
3,146,845✔
464
}
465

466
#ifdef BUILD_NO_CALL
467
static int32_t taosArrayPartition(SArray* pArray, int32_t i, int32_t j, __ext_compar_fn_t fn, const void* userData) {
468
  void* key = taosArrayGetP(pArray, i);
469
  while (i < j) {
470
    while (i < j && fn(taosArrayGetP(pArray, j), key, userData) >= 0) {
471
      j--;
472
    }
473
    if (i < j) {
474
      void* a = taosArrayGetP(pArray, j);
475
      taosArraySet(pArray, i, &a);
476
    }
477
    while (i < j && fn(taosArrayGetP(pArray, i), key, userData) <= 0) {
478
      i++;
479
    }
480
    if (i < j) {
481
      void* a = taosArrayGetP(pArray, i);
482
      taosArraySet(pArray, j, &a);
483
    }
484
  }
485
  taosArraySet(pArray, i, &key);
486
  return i;
487
}
488

489
static void taosArrayQuicksortImpl(SArray* pArray, int32_t low, int32_t high, __ext_compar_fn_t fn, const void* param) {
490
  if (low < high) {
491
    int32_t idx = taosArrayPartition(pArray, low, high, fn, param);
492
    taosArrayQuicksortImpl(pArray, low, idx - 1, fn, param);
493
    taosArrayQuicksortImpl(pArray, idx + 1, high, fn, param);
494
  }
495
}
496

497
static void taosArrayQuickSort(SArray* pArray, __ext_compar_fn_t fn, const void* param) {
498
  if (pArray->size <= 1) {
499
    return;
500
  }
501
  taosArrayQuicksortImpl(pArray, 0, (int32_t)(taosArrayGetSize(pArray) - 1), fn, param);
502
}
503

504
static void taosArrayInsertSort(SArray* pArray, __ext_compar_fn_t fn, const void* param) {
505
  if (pArray->size <= 1) {
506
    return;
507
  }
508

509
  for (int32_t i = 1; i <= pArray->size - 1; ++i) {
510
    for (int32_t j = i; j > 0; --j) {
511
      if (fn(taosArrayGetP(pArray, j), taosArrayGetP(pArray, j - 1), param) == -1) {
512
        void* a = taosArrayGetP(pArray, j);
513
        void* b = taosArrayGetP(pArray, j - 1);
514
        taosArraySet(pArray, j - 1, &a);
515
        taosArraySet(pArray, j, &b);
516
      } else {
517
        break;
518
      }
519
    }
520
  }
521
}
522
#endif
523

524
int32_t taosEncodeArray(void** buf, const SArray* pArray, FEncode encode) {
5,086✔
525
  int32_t tlen = 0;
5,086✔
526
  int32_t sz = pArray->size;
5,086✔
527
  tlen += taosEncodeFixedI32(buf, sz);
5,086✔
528
  for (int32_t i = 0; i < sz; i++) {
13,356✔
529
    void* data = taosArrayGetP(pArray, i);
8,270✔
530
    tlen += encode(buf, data);
8,270✔
531
  }
532
  return tlen;
5,086✔
533
}
534

535
void* taosDecodeArray(const void* buf, SArray** pArray, FDecode decode, int32_t dataSz, int8_t sver) {
1,980!
536
  int32_t sz;
537
  buf = taosDecodeFixedI32(buf, &sz);
1,980✔
538
  *pArray = taosArrayInit(sz, sizeof(void*));
1,980✔
539
  if (*pArray == NULL) {
1,980!
540
    return NULL;
×
541
  }
542
  for (int32_t i = 0; i < sz; i++) {
5,534✔
543
    void* data = taosMemoryCalloc(1, dataSz);
3,554!
544
    if (data == NULL) {
3,554!
545
      return NULL;
×
546
    }
547

548
    buf = decode(buf, data, sver);
3,554✔
549

550
    if (taosArrayPush(*pArray, &data) == NULL) {
7,108!
551
      taosMemoryFree(data);
×
552
      return NULL;
×
553
    }
554
  }
555
  return (void*)buf;
1,980✔
556
}
557

558
// todo remove it
559
// order array<type *>
560
int32_t taosArraySortPWithExt(SArray* pArray, __ext_compar_fn_t fn, const void* param) {
1✔
561
  return taosqsort(pArray->pData, pArray->size, pArray->elemSize, param, fn);
1✔
562
}
563

564
void taosArraySwap(SArray* a, SArray* b) {
21✔
565
  if (a == NULL || b == NULL) return;
21!
566
  size_t t = a->size;
21✔
567
  a->size = b->size;
21✔
568
  b->size = t;
21✔
569

570
  uint32_t cap = a->capacity;
21✔
571
  a->capacity = b->capacity;
21✔
572
  b->capacity = cap;
21✔
573

574
  uint32_t elem = a->elemSize;
21✔
575
  a->elemSize = b->elemSize;
21✔
576
  b->elemSize = elem;
21✔
577

578
  void* data = a->pData;
21✔
579
  a->pData = b->pData;
21✔
580
  b->pData = data;
21✔
581
}
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