libcryfs/implementations/testfake/FakeBlockStore.cpp
2015-04-15 14:51:41 +02:00

67 lines
1.8 KiB
C++

#include "FakeBlock.h"
#include "FakeBlockStore.h"
using std::unique_ptr;
using std::make_unique;
using std::make_shared;
using std::string;
using std::mutex;
using std::lock_guard;
namespace blockstore {
namespace testfake {
FakeBlockStore::FakeBlockStore()
: _blocks(), _used_dataregions_for_blocks() {}
unique_ptr<Block> FakeBlockStore::create(const Key &key, size_t size) {
if (_blocks.find(key.ToString()) != _blocks.end()) {
return nullptr;
}
Data data(size);
data.FillWithZeroes();
return makeFakeBlockFromData(key, data, true);
}
unique_ptr<Block> FakeBlockStore::load(const Key &key) {
//Return a copy of the stored data
string key_string = key.ToString();
try {
return makeFakeBlockFromData(key, _blocks.at(key_string), false);
} catch (const std::out_of_range &e) {
return nullptr;
}
}
void FakeBlockStore::remove(unique_ptr<Block> block) {
Key key = block->key();
block.reset();
int numRemoved = _blocks.erase(key.ToString());
assert(numRemoved == 1);
}
unique_ptr<Block> FakeBlockStore::makeFakeBlockFromData(const Key &key, const Data &data, bool dirty) {
auto newdata = make_shared<Data>(data.copy());
_used_dataregions_for_blocks.push_back(newdata);
return make_unique<FakeBlock>(this, key, newdata, dirty);
}
void FakeBlockStore::updateData(const Key &key, const Data &data) {
auto found = _blocks.find(key.ToString());
if (found == _blocks.end()) {
auto insertResult = _blocks.emplace(key.ToString(), data.size());
assert(true == insertResult.second);
found = insertResult.first;
}
Data &stored_data = found->second;
assert(data.size() == stored_data.size());
std::memcpy(stored_data.data(), data.data(), data.size());
}
uint64_t FakeBlockStore::numBlocks() const {
return _blocks.size();
}
}
}