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More work on the SHAMap/Serialize classes.

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This commit is contained in:
JoelKatz
2011-11-17 18:11:11 -08:00
parent e7bae43261
commit 477b2df276
5 changed files with 88 additions and 24 deletions
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31
SHAMap.cpp
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@@ -4,7 +4,12 @@
#include <boost/foreach.hpp>
SHAMap::SHAMap(int leafDataSize) : mLeafDataSize(leafDataSize)
SHAMapItem::SHAMapItem(const uint256 &tag) : mTag(tag)
{
mData.insert(mData.end(), tag.begin(), tag.end());
}
SHAMap::SHAMap(int leafDataSize, int leafDataOffset) : mLeafDataSize(leafDataSize), mLeafDataOffset(leafDataOffset)
{
;
}
@@ -86,14 +91,30 @@ SHAMapLeafNode::pointer SHAMap::walkToLeaf(const uint256& id, bool create,
SHAMapLeafNode::pointer SHAMap::getLeaf(const SHAMapNode &id, const uint256& hash)
{ // retrieve a leaf whose node hash is known
SHAMapLeafNode::pointer leaf=mLeafByID[id];
assert(!!hash);
SHAMapLeafNode::pointer leaf=mLeafByID[id]; // is the leaf in memory
if(leaf != SHAMapLeafNode::pointer()) return leaf;
std::vector<unsigned char> rawNode;
std::vector<unsigned char> rawNode; // is it in backing store
if(!fetchNode(hash, id, rawNode)) return leaf;
Serializer s(rawNode);
leaf=SHAMapLeafNode::pointer(new SHAMapLeafNode(id));
// construct leaf WRITEME
for(int i=0; i<s.getLength(); i+=mLeafDataSize)
{
uint256 tag;
if(mLeafDataOffset<0)
{
Serializer inner;
inner.addRaw(s.getRaw(i, mLeafDataSize));
tag=inner.getSHA512Half();
}
else tag=s.get256(i+mLeafDataOffset);
leaf->addUpdateItem(SHAMapItem(tag, s.getRaw(i, mLeafDataSize)));
}
leaf->updateHash();
assert(leaf->getNodeHash()==hash);
return leaf;
}