public static object ReadValue(this IntPtr baseAddress, ref int offset, ItemType type)
{
object val = null;
switch (type)
{
case ItemType.Int8:
val = (sbyte)Marshal.ReadByte(baseAddress, offset);
break;
case ItemType.UInt8:
val = Marshal.ReadByte(baseAddress, offset);
break;
case ItemType.Bool:
case ItemType.UInt16:
val = (ushort)Marshal.ReadInt16(baseAddress, offset);
break;
case ItemType.Int16:
val = Marshal.ReadInt16(baseAddress, offset);
break;
case ItemType.UInt32:
val = (uint)Marshal.ReadInt32(baseAddress, offset);
break;
case ItemType.Int32:
val = Marshal.ReadInt32(baseAddress, offset);
break;
case ItemType.Fix32:
TWFix32 f32 = new TWFix32();
f32.Whole = Marshal.ReadInt16(baseAddress, offset);
f32.Fraction = (ushort)Marshal.ReadInt16(baseAddress, offset + 2);
val = f32;
break;
case ItemType.Frame:
TWFrame frame = new TWFrame();
frame.Left = (TWFix32)ReadValue(baseAddress, ref offset, ItemType.Fix32);
frame.Top = (TWFix32)ReadValue(baseAddress, ref offset, ItemType.Fix32);
frame.Right = (TWFix32)ReadValue(baseAddress, ref offset, ItemType.Fix32);
frame.Bottom = (TWFix32)ReadValue(baseAddress, ref offset, ItemType.Fix32);
return(frame); // no need to update offset again after reading fix32
case ItemType.String128:
case ItemType.String255:
case ItemType.String32:
case ItemType.String64:
val = Marshal.PtrToStringAnsi(new IntPtr(baseAddress.ToInt64() + offset));
break;
case ItemType.Handle:
val = Marshal.ReadIntPtr(baseAddress, offset);
break;
}
offset += GetItemTypeSize(type);
return(val);
}
public static void WriteValue(this IntPtr baseAddr, ref int offset, ItemType type, object value)
{
switch (type)
{
case ItemType.Int8:
case ItemType.UInt8:
Marshal.WriteByte(baseAddr, offset, Convert.ToByte(value, CultureInfo.InvariantCulture)); // (byte)value);
break;
case ItemType.Bool:
case ItemType.Int16:
case ItemType.UInt16:
Marshal.WriteInt16(baseAddr, offset, Convert.ToInt16(value, CultureInfo.InvariantCulture)); //(short)value);
break;
case ItemType.UInt32:
case ItemType.Int32:
Marshal.WriteInt32(baseAddr, offset, Convert.ToInt32(value, CultureInfo.InvariantCulture)); //(int)value);
break;
case ItemType.Fix32:
TWFix32 f32 = (TWFix32)value;
Marshal.WriteInt16(baseAddr, offset, f32.Whole);
if (f32.Fraction > Int16.MaxValue)
{
Marshal.WriteInt16(baseAddr, offset + 2, (Int16)(f32.Fraction - 32768));
}
else
{
Marshal.WriteInt16(baseAddr, offset + 2, (Int16)f32.Fraction);
}
break;
case ItemType.Frame:
TWFrame frame = (TWFrame)value;
WriteValue(baseAddr, ref offset, ItemType.Fix32, (TWFix32)frame.Left);
WriteValue(baseAddr, ref offset, ItemType.Fix32, (TWFix32)frame.Top);
WriteValue(baseAddr, ref offset, ItemType.Fix32, (TWFix32)frame.Right);
WriteValue(baseAddr, ref offset, ItemType.Fix32, (TWFix32)frame.Bottom);
return; // no need to update offset for this
//case ItemType.String1024:
// WriteString(baseAddr, offset, value as string, 1024);
// break;
case ItemType.String128:
WriteString(baseAddr, offset, (string)value, 128);
break;
case ItemType.String255:
WriteString(baseAddr, offset, (string)value, 255);
break;
case ItemType.String32:
WriteString(baseAddr, offset, (string)value, 32);
break;
case ItemType.String64:
WriteString(baseAddr, offset, (string)value, 64);
break;
//case ItemType.Unicode512:
// WriteUString(baseAddr, offset, value as string, 512);
// break;
}
offset += TypeExtensions.GetItemTypeSize(type);
}
