init

front/ymsg/Y64.py

@@ -0,0 +1,29 @@
+Y64 = b'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789._'
+
+def Y64Encode(string_encode: bytes) -> bytes:
+	limit = len(string_encode) - (len(string_encode) % 3)
+	out = bytearray()
+	buff = [0] * len(string_encode)
+	
+	for i in range(len(string_encode)):
+		buff[i] = string_encode[i] & 0xff
+	
+	for i in range(0, limit, 3):
+		out.extend([Y64[buff[i] >> 2],
+					Y64[((buff[i] << 4) & 0x30) | (buff[i + 1] >> 4)],
+					Y64[((buff[i + 1] << 2) & 0x3c) | (buff[i + 2] >> 6)],
+					Y64[buff[i + 2] & 0x3f]])
+	
+	remaining = len(string_encode) - limit
+	if remaining == 1:
+		out.extend([Y64[buff[limit] >> 2],
+					Y64[(buff[limit] << 4) & 0x30],
+					ord('-'),
+					ord('-')])
+	elif remaining == 2:
+		out.extend([Y64[buff[limit] >> 2],
+					Y64[((buff[limit] << 4) & 0x30) | (buff[limit + 1] >> 4)],
+					Y64[(buff[limit + 1] << 2) & 0x3c],
+					ord('-')])
+	
+	return bytes(out)