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Fix strict-aliasing compiler warning

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This commit is contained in:
Jon Siwek 2018-08-29 17:18:56 -05:00
parent ffe895a0f1
commit 0c9878f136
1 changed files with 9 additions and 6 deletions
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15
src/probabilistic/Hasher.cc
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@ -118,16 +118,19 @@ Hasher::digest UHF::hash(const void* x, size_t n) const
return outdigest;
}
unsigned char d[16];
MD5(reinterpret_cast<const unsigned char*>(x), n, d);
union {
unsigned char d[16];
Hasher::digest rval;
} u;
MD5(reinterpret_cast<const unsigned char*>(x), n, u.d);
const unsigned char* s = reinterpret_cast<const unsigned char*>(&seed);
for ( size_t i = 0; i < 16; ++i )
d[i] ^= s[i % sizeof(seed)];
u.d[i] ^= s[i % sizeof(seed)];
MD5(d, 16, d);
return *reinterpret_cast<const Hasher::digest*>(d);
MD5(u.d, 16, u.d);
return u.rval;
}
DefaultHasher::DefaultHasher(size_t k, Hasher::seed_t seed)