libcryfs/implementations/testfake/FakeBlock.cpp

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#include "FakeBlock.h"
#include "FakeBlockStore.h"
#include <cstring>
#include <messmer/cpp-utils/assert/assert.h>
using std::shared_ptr;
using std::istream;
using std::ostream;
using std::ifstream;
using std::ofstream;
using std::ios;
using std::string;
using cpputils::Data;
namespace blockstore {
namespace testfake {
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FakeBlock::FakeBlock(FakeBlockStore *store, const Key &key, shared_ptr<Data> data, bool dirty)
: Block(key), _store(store), _data(data), _dataChanged(dirty) {
}
FakeBlock::~FakeBlock() {
flush();
}
const void *FakeBlock::data() const {
return _data->data();
}
void FakeBlock::write(const void *source, uint64_t offset, uint64_t size) {
ASSERT(offset <= _data->size() && offset + size <= _data->size(), "Write outside of valid area"); //Also check offset < _data->size() because of possible overflow in the addition
std::memcpy((uint8_t*)_data->data()+offset, source, size);
_dataChanged = true;
}
size_t FakeBlock::size() const {
return _data->size();
}
void FakeBlock::flush() {
if(_dataChanged) {
_store->updateData(key(), *_data);
_dataChanged = false;
}
}
}
}