uint64_t VelocyPackHelper::hashByAttributes(
VPackSlice slice, std::vector<std::string> const& attributes,
bool docComplete, int& error, std::string const& key) {
uint64_t hash = TRI_FnvHashBlockInitial();
error = TRI_ERROR_NO_ERROR;
slice = slice.resolveExternal();
if (slice.isObject()) {
for (auto const& attr : attributes) {
VPackSlice sub = slice.get(attr).resolveExternal();
if (sub.isNone()) {
if (attr == StaticStrings::KeyString && !key.empty()) {
VPackBuilder temporaryBuilder;
temporaryBuilder.add(VPackValue(key));
hash = temporaryBuilder.slice().normalizedHash(hash);
continue;
}
if (!docComplete) {
error = TRI_ERROR_CLUSTER_NOT_ALL_SHARDING_ATTRIBUTES_GIVEN;
}
// Null is equal to None/not present
sub = VPackSlice::nullSlice();
}
hash = sub.normalizedHash(hash);
}
}
return hash;
}
size_t VelocyPackHelper::VPackHash::operator()(VPackSlice const& slice) const {
return static_cast<size_t>(slice.normalizedHash());
};
