Initial commit for testing/fixing a deprecated godot-colyseus addon

addons/godot_colyseus/lib/decoder.gd

@@ -0,0 +1,68 @@
+extends RefCounted
+
+const MsgPack = preload("res://addons/godot_colyseus/lib/msgpack.gd")
+
+var reader: StreamPeerBuffer
+
+func _init(reader: StreamPeerBuffer):
+	reader.big_endian = false
+	self.reader = reader
+
+func read_utf8() -> String:
+	var prefix = reader.get_u8()
+	var length = -1
+	
+	if prefix < 0xc0:
+		length = prefix & 0x1f
+	elif prefix == 0xd9:
+		length = reader.get_u8()
+	elif prefix == 0xda:
+		length = reader.get_u16()
+	elif prefix == 0xdb:
+		length = reader.get_u32()
+	
+	return reader.get_utf8_string(length)
+
+func number():
+	var prefix = reader.get_u8()
+	
+	if prefix < 0x80:
+		return prefix
+	elif prefix == 0xca:
+		return reader.get_float()
+	elif prefix == 0xcb:
+		return reader.get_double()
+	elif prefix == 0xcc:
+		return reader.get_u8()
+	elif prefix == 0xcd:
+		return reader.get_u16()
+	elif prefix == 0xce:
+		return reader.get_u32()
+	elif prefix == 0xcf:
+		return reader.get_u64()
+	elif prefix == 0xd0:
+		return reader.get_8()
+	elif prefix == 0xd1:
+		return reader.get_16()
+	elif prefix == 0xd2:
+		return reader.get_32()
+	elif prefix == 0xd3:
+		return reader.get_64()
+	elif prefix > 0xdf:
+		return (0xff - prefix + 1) * -1
+
+func has_more() -> bool:
+	return reader.get_position() < reader.get_size()
+
+func current_bit() -> int:
+	return reader.data_array[reader.get_position()]
+
+func is_number() -> bool:
+	var prefix = current_bit()
+	return prefix < 0x80 || (prefix >= 0xca && prefix <= 0xd3)
+
+func unpack():
+	var result = MsgPack.decode(reader)
+	if result.error == OK:
+		return result.result
+	return null