comparison: src/array_list.c
src/array_list.c
- changeset 1322
- 7be10b57f658
- parent 1319
- aa1f580f8f59
- child 1387
- 9bdd053820b7
equal
deleted
inserted
replaced
| 1321:1003c014bf92 | 1322:7be10b57f658 |
|---|---|
| 34 | 34 |
| 35 // Default array reallocator | 35 // Default array reallocator |
| 36 | 36 |
| 37 static void *cx_array_default_realloc( | 37 static void *cx_array_default_realloc( |
| 38 void *array, | 38 void *array, |
| 39 size_t capacity, | 39 cx_attr_unused size_t old_capacity, |
| 40 size_t new_capacity, | |
| 40 size_t elem_size, | 41 size_t elem_size, |
| 41 cx_attr_unused CxArrayReallocator *alloc | 42 cx_attr_unused CxArrayReallocator *alloc |
| 42 ) { | 43 ) { |
| 43 size_t n; | 44 size_t n; |
| 44 if (cx_szmul(capacity, elem_size, &n)) { | 45 if (cx_szmul(new_capacity, elem_size, &n)) { |
| 45 errno = EOVERFLOW; | 46 errno = EOVERFLOW; |
| 46 return NULL; | 47 return NULL; |
| 47 } | 48 } |
| 48 return cxReallocDefault(array, n); | 49 return cxReallocDefault(array, n); |
| 49 } | 50 } |
| 56 | 57 |
| 57 // Stack-aware array reallocator | 58 // Stack-aware array reallocator |
| 58 | 59 |
| 59 static void *cx_array_advanced_realloc( | 60 static void *cx_array_advanced_realloc( |
| 60 void *array, | 61 void *array, |
| 61 size_t capacity, | 62 size_t old_capacity, |
| 63 size_t new_capacity, | |
| 62 size_t elem_size, | 64 size_t elem_size, |
| 63 cx_attr_unused CxArrayReallocator *alloc | 65 cx_attr_unused CxArrayReallocator *alloc |
| 64 ) { | 66 ) { |
| 65 // check for overflow | 67 // check for overflow |
| 66 size_t n; | 68 size_t n; |
| 67 if (cx_szmul(capacity, elem_size, &n)) { | 69 if (cx_szmul(new_capacity, elem_size, &n)) { |
| 68 errno = EOVERFLOW; | 70 errno = EOVERFLOW; |
| 69 return NULL; | 71 return NULL; |
| 70 } | 72 } |
| 71 | 73 |
| 72 // retrieve the pointer to the actual allocator | 74 // retrieve the pointer to the actual allocator |
| 75 // check if the array is still located on the stack | 77 // check if the array is still located on the stack |
| 76 void *newmem; | 78 void *newmem; |
| 77 if (array == alloc->ptr2) { | 79 if (array == alloc->ptr2) { |
| 78 newmem = cxMalloc(al, n); | 80 newmem = cxMalloc(al, n); |
| 79 if (newmem != NULL && array != NULL) { | 81 if (newmem != NULL && array != NULL) { |
| 80 memcpy(newmem, array, n); | 82 memcpy(newmem, array, old_capacity*elem_size); |
| 81 } | 83 } |
| 82 } else { | 84 } else { |
| 83 newmem = cxRealloc(al, array, n); | 85 newmem = cxRealloc(al, array, n); |
| 84 } | 86 } |
| 85 return newmem; | 87 return newmem; |
| 178 // calculate new capacity (next number divisible by 16) | 180 // calculate new capacity (next number divisible by 16) |
| 179 newcap = cx_array_align_capacity(newcap, 16, max_size); | 181 newcap = cx_array_align_capacity(newcap, 16, max_size); |
| 180 | 182 |
| 181 // perform reallocation | 183 // perform reallocation |
| 182 void *newmem = reallocator->realloc( | 184 void *newmem = reallocator->realloc( |
| 183 *array, newcap, elem_size, reallocator | 185 *array, oldcap, newcap, elem_size, reallocator |
| 184 ); | 186 ); |
| 185 if (newmem == NULL) { | 187 if (newmem == NULL) { |
| 186 return 1; // LCOV_EXCL_LINE | 188 return 1; // LCOV_EXCL_LINE |
| 187 } | 189 } |
| 188 | 190 |
| 284 newcap = cx_array_align_capacity(newsize, 16, max_size); | 286 newcap = cx_array_align_capacity(newsize, 16, max_size); |
| 285 assert(newcap > newsize); | 287 assert(newcap > newsize); |
| 286 | 288 |
| 287 // perform reallocation | 289 // perform reallocation |
| 288 void *newmem = reallocator->realloc( | 290 void *newmem = reallocator->realloc( |
| 289 *target, newcap, elem_size, reallocator | 291 *target, oldcap, newcap, elem_size, reallocator |
| 290 ); | 292 ); |
| 291 if (newmem == NULL) { | 293 if (newmem == NULL) { |
| 292 return 1; | 294 return 1; |
| 293 } | 295 } |
| 294 | 296 |
| 364 return 1; | 366 return 1; |
| 365 } | 367 } |
| 366 | 368 |
| 367 // store some counts | 369 // store some counts |
| 368 size_t old_size = *size; | 370 size_t old_size = *size; |
| 371 size_t old_capacity = *capacity; | |
| 369 size_t needed_capacity = old_size + elem_count; | 372 size_t needed_capacity = old_size + elem_count; |
| 370 | 373 |
| 371 // if we need more than we have, try a reallocation | 374 // if we need more than we have, try a reallocation |
| 372 if (needed_capacity > *capacity) { | 375 if (needed_capacity > old_capacity) { |
| 373 size_t new_capacity = cx_array_align_capacity(needed_capacity, 16, SIZE_MAX); | 376 size_t new_capacity = cx_array_align_capacity(needed_capacity, 16, SIZE_MAX); |
| 374 void *new_mem = reallocator->realloc( | 377 void *new_mem = reallocator->realloc( |
| 375 *target, new_capacity, elem_size, reallocator | 378 *target, old_capacity, new_capacity, elem_size, reallocator |
| 376 ); | 379 ); |
| 377 if (new_mem == NULL) { | 380 if (new_mem == NULL) { |
| 378 // give it up right away, there is no contract | 381 // give it up right away, there is no contract |
| 379 // that requires us to insert as much as we can | 382 // that requires us to insert as much as we can |
| 380 return 1; // LCOV_EXCL_LINE | 383 return 1; // LCOV_EXCL_LINE |
