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fix signed-integer-overflow issue:

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Hash functions rely on 2's complement behaviour. Use unsigned integers to get that.
This commit is contained in:
Erwin Coumans
2017-05-09 16:36:11 -07:00
parent e6d1ed6ffe
commit 0d3940b8bd
3 changed files with 12 additions and 15 deletions
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6
src/BulletCollision/CollisionDispatch/btHashedSimplePairCache.h
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@@ -123,9 +123,9 @@ private:
SIMD_FORCE_INLINE unsigned int getHash(unsigned int indexA, unsigned int indexB)
SIMD_FORCE_INLINE unsigned int getHash(unsigned int indexA, unsigned int indexB)
{
int key = static_cast<int>(((unsigned int)indexA) | (((unsigned int)indexB) <<16));
unsigned int key = indexA | (indexB << 16);
// Thomas Wang's hash
key += ~(key << 15);
@@ -134,7 +134,7 @@ private:
key ^= (key >> 6);
key += ~(key << 11);
key ^= (key >> 16);
return static_cast<unsigned int>(key);
return key;
}