| David 'Digit' Turner | 4c0f745 | 2010-11-17 17:55:17 +0100 | [diff] [blame] | 1 | #include <android/utils/vector.h> |
| 2 | #include <limits.h> |
| 3 | |
| 4 | extern void |
| 5 | _avector_ensure( void** items, size_t itemSize, unsigned* pMaxItems, unsigned newCount ) |
| 6 | { |
| 7 | unsigned oldMax = *pMaxItems; |
| 8 | |
| 9 | if (newCount > oldMax) { |
| 10 | unsigned newMax = oldMax; |
| 11 | unsigned bigMax = UINT_MAX / itemSize; |
| 12 | |
| 13 | if (itemSize == 0) { |
| 14 | AASSERT_FAIL("trying to reallocate array of 0-size items (count=%d)\n", newCount); |
| 15 | } |
| 16 | |
| 17 | if (newCount > bigMax) { |
| 18 | AASSERT_FAIL("trying to reallocate over-sized array of %d-bytes items (%d > %d)\n", |
| 19 | itemSize, newCount, bigMax); |
| 20 | } |
| 21 | |
| 22 | while (newMax < newCount) { |
| 23 | unsigned newMax2 = newMax + (newMax >> 1) + 4; |
| 24 | if (newMax2 < newMax || newMax2 > bigMax) |
| 25 | newMax2 = bigMax; |
| 26 | newMax = newMax2; |
| 27 | } |
| 28 | |
| 29 | *items = _android_array_realloc( *items, itemSize, newMax ); |
| 30 | *pMaxItems = newMax; |
| 31 | } |
| 32 | } |
| 33 | |