public BDB43(string file, string table, bool create, DBFormat format, bool allowDuplicates, Env environment) {
this.env = environment;
db_create(out dbp, environment.envptr, 0);
funcs = (dbstruct)Marshal.PtrToStructure((IntPtr)((int)dbp+268), typeof(dbstruct));
uint dbflags = DB_DIRECT_DB;
if (allowDuplicates)
dbflags |= DB_DUP; // DB_DUPSORT;
funcs.set_flags(dbp, dbflags);
int type = (int)format;
uint flags = DB_DIRTY_READ; // | DB_AUTO_COMMIT;
int chmod_mode = 0;
if (create)
flags |= DB_CREATE;
// if file & database are null, db is held in-memory
// on file is taken as UTF8 (is this call right?)
int ret = funcs.open(dbp, env.Txn, file, table, type, flags, chmod_mode);
CheckError(ret);
binfmt = new Serializer();
}
public object GetObject(Serializer binfmt, DataType datatype) {
if (Size == 0) return null;
if (datatype == DataType.UInt) {
staticalloc((int)Size);
Marshal.Copy(Ptr, staticdata, 0, (int)Size);
byte[] d = staticdata;
uint val = (uint)d[0] + ((uint)d[1] << 8) + ((uint)d[2] << 16) + ((uint)d[3] << 24);
return val;
} else if (datatype == DataType.IntArray) {
int[] data = new int[(int)Size/4];
Marshal.Copy(Ptr, data, 0, data.Length);
return data;
/*} else if (datatype == DataType.String && false) {
char[] data = new char[(int)Size/2];
Marshal.Copy(Ptr, data, 0, data.Length);
return new String(data);*/
} else {
staticalloc((int)Size);
Marshal.Copy(Ptr, staticdata, 0, (int)Size);
return binfmt.Deserialize(staticdata);
}
}
public static Data New(object data, Serializer binfmt, DataType datatype) {
Data ret = new Data();
if (data == null) {
ret.Ptr = IntPtr.Zero;
ret.Size = 0;
} else if (datatype == DataType.UInt) {
staticalloc(4);
uint value = (uint)data;
byte[] d = staticdata;
d[0] = (byte)((value) & 0xFF);
d[1] = (byte)((value >> 8) & 0xFF);
d[2] = (byte)((value >> 16) & 0xFF);
d[3] = (byte)((value >> 24) & 0xFF);
ret.Ptr = BytesToAlloc(d, 4, 1);
ret.Size = (uint)4;
} else if (datatype == DataType.IntArray) {
int[] values = (int[])data;
ret.Size = (uint)(4*values.Length);
ret.Ptr = BytesToAlloc(values, values.Length, 4);
/*} else if (datatype == DataType.String && false) {
// Somehow this is slower than the below path.
char[] values = ((string)data).ToCharArray();
ret.Size = (uint)(2*values.Length);
ret.Ptr = BytesToAlloc(values, values.Length, 2);*/
} else {
MemoryStream binary = binfmt.Serialize(data);
if (binary.Length > uint.MaxValue)
throw new ArgumentException("data is too large");
ret.Ptr = BytesToAlloc(binary.GetBuffer(), (int)binary.Length, 1);
ret.Size = (uint)binary.Length;
}
return ret;
}
