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crate::ix!();
///------------------------
pub struct DBIterator<'a> {
parent: Rc<DBWrapper>,
piter: &'a mut dyn leveldb::LevelDBIteratorInterface,
}
impl<'a> Drop for DBIterator<'a> {
fn drop(&mut self) {
todo!();
/*
delete piter;
*/
}
}
impl<'a> DBIterator<'a> {
/**
| @param[in] _parent
|
| Parent CDBWrapper instance.
| ----------
| @param[in] _piter
|
| The original leveldb iterator.
|
*/
pub fn new(
parent: &DBWrapper,
piter: *mut leveldb::LevelDBIterator) -> Self {
todo!();
/*
: parent(_parent),
: piter(_piter),
*/
}
pub fn seek<K>(&mut self, key: &K) {
let mut ss_key: DataStream = DataStream::new(SER_DISK.try_into().unwrap(), CLIENT_VERSION);
ss_key.reserve(DBWRAPPER_PREALLOC_KEY_SIZE);
ss_key.stream(&key);
let sl_key: leveldb::Slice
= leveldb::Slice::from_ptr_len(ss_key.data() as *mut u8, ss_key.size());
(*self.piter).seek(&sl_key);
}
pub fn get_key<K>(&mut self, key: &mut K) -> bool {
let sl_key: leveldb::Slice = (*self.piter).key();
let mut try_block = || -> TryBlockResult::<_,&'static str> {
let slice = unsafe {
std::ptr::slice_from_raw_parts(
sl_key.data(),
sl_key.size()
).as_ref().unwrap()
};
let mut ss_key: DataStream
= DataStream::new_with_slice(
slice,
SER_DISK.try_into().unwrap(),
CLIENT_VERSION
);
ss_key.stream_into(&mut *key);
TryBlockResult::Success
};
match try_block() {
TryBlockResult::Return(v) => return v,
TryBlockResult::Err(e) => {
return false;
},
TryBlockResult::Success => { }
TryBlockResult::Break => { }
}
true
}
pub fn get_value<V>(&mut self, value: &mut V) -> bool {
let sl_value: leveldb::Slice = (*self.piter).value();
todo!();
/*
try {
DataStream ssValue(MakeUCharSpan(slValue), SER_DISK, CLIENT_VERSION);
ssValue.Xor(dbwrapper_:GetObfuscateKey(parent));
ssValue >> value;
} catch (const std::exception&) {
return false;
}
*/
true
}
pub fn get_value_size(&mut self) -> usize {
(*self.piter).value().size()
}
pub fn valid(&self) -> bool {
(*self.piter).valid()
}
pub fn seek_to_first(&mut self) {
(*self.piter).seek_to_first();
}
pub fn next(&mut self) {
(*self.piter).next();
}
}