111 lines
5.0 KiB
C++
111 lines
5.0 KiB
C++
#include <cpp-utils/data/SerializationHelper.h>
|
|
#include "DirEntry.h"
|
|
#include <cstdint>
|
|
|
|
using std::vector;
|
|
using std::string;
|
|
using blockstore::BlockId;
|
|
|
|
namespace cryfs {
|
|
namespace fsblobstore {
|
|
|
|
namespace {
|
|
template<typename DataType>
|
|
size_t serialize_(void* dst, const DataType& obj) {
|
|
cpputils::serialize<DataType>(dst, obj);
|
|
return sizeof(DataType);
|
|
}
|
|
|
|
template<typename DataType>
|
|
DataType deserialize_(const char** src) {
|
|
DataType result = cpputils::deserialize<DataType>(*src);
|
|
*src += sizeof(DataType);
|
|
return result;
|
|
}
|
|
|
|
constexpr size_t serializedTimeValueSize_() {
|
|
return sizeof(uint64_t) + sizeof(uint32_t);
|
|
}
|
|
|
|
unsigned int serializeTimeValue_(uint8_t *dest, timespec value) {
|
|
unsigned int offset = 0;
|
|
offset += serialize_<uint64_t>(dest + offset, value.tv_sec);
|
|
offset += serialize_<uint32_t>(dest + offset, value.tv_nsec);
|
|
ASSERT(offset == serializedTimeValueSize_(), "serialized to wrong size");
|
|
return offset;
|
|
}
|
|
|
|
timespec deserializeTimeValue_(const char **pos) {
|
|
timespec value{};
|
|
value.tv_sec = deserialize_<uint64_t>(pos);
|
|
value.tv_nsec = deserialize_<uint32_t>(pos);
|
|
return value;
|
|
}
|
|
|
|
unsigned int serializeString_(uint8_t *dest, const string &value) {
|
|
std::memcpy(dest, value.c_str(), value.size()+1);
|
|
return value.size() + 1;
|
|
}
|
|
|
|
string deserializeString_(const char **pos) {
|
|
size_t length = strlen(*pos);
|
|
string value(*pos, length);
|
|
*pos += length + 1;
|
|
return value;
|
|
}
|
|
|
|
unsigned int serializeBlockId_(uint8_t *dest, const BlockId &blockId) {
|
|
blockId.ToBinary(dest);
|
|
return blockId.BINARY_LENGTH;
|
|
}
|
|
|
|
BlockId deserializeBlockId_(const char **pos) {
|
|
BlockId blockId = BlockId::FromBinary(*pos);
|
|
*pos += BlockId::BINARY_LENGTH;
|
|
return blockId;
|
|
}
|
|
}
|
|
|
|
void DirEntry::serialize(uint8_t *dest) const {
|
|
ASSERT(
|
|
((_type == fspp::Dir::EntryType::FILE) && _mode.hasFileFlag() && !_mode.hasDirFlag() && !_mode.hasSymlinkFlag()) ||
|
|
((_type == fspp::Dir::EntryType::DIR) && !_mode.hasFileFlag() && _mode.hasDirFlag() && !_mode.hasSymlinkFlag()) ||
|
|
((_type == fspp::Dir::EntryType::SYMLINK) && !_mode.hasFileFlag() && !_mode.hasDirFlag() && _mode.hasSymlinkFlag())
|
|
, "Wrong mode bit set for this type: " + std::to_string(_mode.hasFileFlag()) + ", " + std::to_string(
|
|
_mode.hasDirFlag()) + ", " + std::to_string(_mode.hasSymlinkFlag()) + ", " + std::to_string(static_cast<uint8_t>(_type))
|
|
);
|
|
unsigned int offset = 0;
|
|
offset += serialize_<uint8_t>(dest + offset, static_cast<uint8_t>(_type));
|
|
offset += serialize_<uint32_t>(dest + offset, _mode.value());
|
|
offset += serialize_<uint32_t>(dest + offset, _uid.value());
|
|
offset += serialize_<uint32_t>(dest + offset, _gid.value());
|
|
offset += serializeTimeValue_(dest + offset, _lastAccessTime);
|
|
offset += serializeTimeValue_(dest + offset, _lastModificationTime);
|
|
offset += serializeTimeValue_(dest + offset, _lastMetadataChangeTime);
|
|
offset += serializeString_(dest + offset, _name);
|
|
offset += serializeBlockId_(dest + offset, _blockId);
|
|
ASSERT(offset == serializedSize(), "Didn't write correct number of elements");
|
|
}
|
|
|
|
const char *DirEntry::deserializeAndAddToVector(const char *pos, vector<DirEntry> *result) {
|
|
fspp::Dir::EntryType type = static_cast<fspp::Dir::EntryType>(deserialize_<uint8_t>(&pos));
|
|
fspp::mode_t mode = fspp::mode_t(deserialize_<uint32_t>(&pos));
|
|
fspp::uid_t uid = fspp::uid_t(deserialize_<uint32_t>(&pos));
|
|
fspp::gid_t gid = fspp::gid_t(deserialize_<uint32_t>(&pos));
|
|
timespec lastAccessTime = deserializeTimeValue_(&pos);
|
|
timespec lastModificationTime = deserializeTimeValue_(&pos);
|
|
timespec lastMetadataChangeTime = deserializeTimeValue_(&pos);
|
|
string name = deserializeString_(&pos);
|
|
BlockId blockId = deserializeBlockId_(&pos);
|
|
|
|
result->emplace_back(type, name, blockId, mode, uid, gid, lastAccessTime, lastModificationTime, lastMetadataChangeTime);
|
|
return pos;
|
|
}
|
|
|
|
size_t DirEntry::serializedSize() const {
|
|
return 1 + sizeof(uint32_t) + sizeof(uint32_t) + sizeof(uint32_t) + 3*serializedTimeValueSize_() + (
|
|
_name.size() + 1) + _blockId.BINARY_LENGTH;
|
|
}
|
|
}
|
|
}
|