public void Enumerator()
{
var writeOptions = Native.leveldb_writeoptions_create();
Native.leveldb_put(Database, writeOptions, "key1", "value1");
Native.leveldb_put(Database, writeOptions, "key2", "value2");
Native.leveldb_put(Database, writeOptions, "key3", "value3");
var entries = new List <KeyValuePair <string, string> >();
var readOptions = Native.leveldb_readoptions_create();
IntPtr iter = Native.leveldb_create_iterator(Database, readOptions);
for (Native.leveldb_iter_seek_to_first(iter);
(int)Native.leveldb_iter_valid(iter) != 0;
Native.leveldb_iter_next(iter))
{
string key = Native.leveldb_iter_key(iter);
string value = Native.leveldb_iter_value(iter);
var entry = new KeyValuePair <string, string>(key, value);
entries.Add(entry);
}
Native.leveldb_iter_destroy(iter);
Native.leveldb_readoptions_destroy(readOptions);
Assert.AreEqual(3, entries.Count);
Assert.AreEqual("key1", entries[0].Key);
Assert.AreEqual("value1", entries[0].Value);
Assert.AreEqual("key2", entries[1].Key);
Assert.AreEqual("value2", entries[1].Value);
Assert.AreEqual("key3", entries[2].Key);
Assert.AreEqual("value3", entries[2].Value);
Native.leveldb_writeoptions_destroy(writeOptions);
}
public static void Dump(IntPtr db)
{
var options = Native.leveldb_readoptions_create();
IntPtr iter = Native.leveldb_create_iterator(db, options);
for (Native.leveldb_iter_seek_to_first(iter);
Native.leveldb_iter_valid(iter);
Native.leveldb_iter_next(iter))
{
string key = Native.leveldb_iter_key(iter);
string value = Native.leveldb_iter_value(iter);
Console.WriteLine("'{0}' => '{1}'", key, value);
}
Native.leveldb_iter_destroy(iter);
}
public IEnumerator <KeyValuePair <string, string> > GetEnumerator()
{
CheckDisposed();
var options = new ReadOptions();
IntPtr iter = IntPtr.Zero;
try {
iter = Native.leveldb_create_iterator(Handle, options.Handle);
for (Native.leveldb_iter_seek_to_first(iter);
Native.leveldb_iter_valid(iter);
Native.leveldb_iter_next(iter))
{
string key = Native.leveldb_iter_key(iter);
string value = Native.leveldb_iter_value(iter);
var kvp = new KeyValuePair <string, string>(key, value);
yield return(kvp);
}
} finally {
if (iter != IntPtr.Zero)
{
Native.leveldb_iter_destroy(iter);
}
}
}