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chriseth committed 2016-12-01 16:03:59 +01:00
1 parent 55a719a79c
commit 5789eaa78d
16 files changed
+171 -54
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libdevcore/SwarmHash.cpp
+7 -5
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@@ -38,13 +38,14 @@ h256 swarmHashSimple(bytesConstRef _data, size_t _size)
return keccak256(toLittleEndian(_size) + _data.toBytes());
}
h256 swarmHashIntermediate(bytes const& _input, size_t _offset, size_t _length)
h256 swarmHashIntermediate(string const& _input, size_t _offset, size_t _length)
{
bytesConstRef ref;
bytes innerNodes;
if (_length <= 0x1000)
return swarmHashSimple(bytesConstRef(_input.data() + _offset, _length), _length);
ref = bytesConstRef(_input).cropped(_offset, _length);
else
{
bytes innerNodes;
size_t maxRepresentedSize = 0x1000;
while (maxRepresentedSize * (0x1000 / 32) < _length)
maxRepresentedSize *= (0x1000 / 32);
@@ -53,11 +54,12 @@ h256 swarmHashIntermediate(bytes const& _input, size_t _offset, size_t _length)
size_t size = std::min(maxRepresentedSize, _length - i);
innerNodes += swarmHashIntermediate(_input, _offset + i, size).asBytes();
}
return swarmHashSimple(bytesConstRef(&innerNodes), _length);
ref = bytesConstRef(&innerNodes);
}
return swarmHashSimple(ref, _length);
}
h256 dev::swarmHash(bytes const& _input)
h256 dev::swarmHash(string const& _input)
{
return swarmHashIntermediate(_input, 0, _input.size());
}