/// <summary>
/// If the database contains an entry for "key" return the value,
/// otherwise return null.
/// </summary>
public int[] Get(int key, ReadOptions options)
{
IntPtr error;
IntPtr length;
IntPtr v;
v = LevelDBInterop.leveldb_get(this.Handle, options.Handle, ref key, (IntPtr)sizeof(int), out length, out error);
Throw(error);
if (v != IntPtr.Zero)
{
try
{
var bytes = new int[(long)length / 4];
// TODO: consider >2GB-1
Marshal.Copy(v, bytes, 0, checked ((int)bytes.LongLength));
return(bytes);
}
finally
{
LevelDBInterop.leveldb_free(v);
}
}
return(null);
}
public NativeArray <T> GetRaw <T>(NativeArray key, ReadOptions options)
where T : struct
{
IntPtr error;
IntPtr length;
var handle = new LevelDbFreeHandle();
// todo: remove typecast to int
var v = (Ptr <T>)LevelDBInterop.leveldb_get(
this.Handle,
options.Handle,
key.baseAddr,
key.byteLength,
out length,
out error);
handle.SetHandle((IntPtr)v);
// round down, truncating the array slightly if needed
var count = (IntPtr)((ulong)length / Ptr <T> .sizeof_T);
return(new NativeArray <T> {
baseAddr = v, count = count, handle = handle
});
}
/// <summary>
/// If the database contains an entry for "key" return the value,
/// otherwise return null.
/// </summary>
public byte[] Get(byte[] key, ReadOptions options)
{
IntPtr error;
IntPtr length;
var v = LevelDBInterop.leveldb_get(this.Handle, options.Handle, key, (IntPtr)key.LongLength, out length, out error);
Throw(error);
if (v != IntPtr.Zero)
{
try
{
var bytes = new byte[(long)length];
// TODO: consider copy loop, as Marshal.Copy has 2GB-1 limit, or native pointers
Marshal.Copy(v, bytes, 0, checked ((int)length));
return(bytes);
}
finally
{
LevelDBInterop.leveldb_free(v);
}
}
return(null);
}
