62 …*dest++ = (base64Chars[0] << 2) | ((base64Chars[1] & 0x30) >> 4); // 2: shift 2bits, 4: shift 4bits  in Decode()
63 …*dest++ = (base64Chars[1] << 4) | ((base64Chars[2] & 0x3c) >> 2); // 2: shift 2bits, 4: shift 4bits  in Decode()
64 …*dest++ = (base64Chars[2] << 6) | base64Chars[3]; // 6: shift 6bits, 2: the second char, 3: the th…  in Decode()
72 … tmp[0] = (base64Chars[0] << 2) | ((base64Chars[1] & 0x30) >> 4); // 2: shift 2bits, 4: shift 4bits  in Decode()
73 … tmp[1] = (base64Chars[1] << 4) | ((base64Chars[2] & 0x3c) >> 2); // 2: shift 2bits, 4: shift 4bits  in Decode()
74 …tmp[2] = (base64Chars[2] << 6) | base64Chars[3]; // 6: shift 6bits, 2: the second char, 3: the thi…  in Decode()
100         *dest++ = ENCODE_TABLE[src[0] >> 2]; // 2: shift 2bits  in Encode()
101         *dest++ = ENCODE_TABLE[((src[0] & 0x03) << 4) | (src[1] >> 4)]; // 4: shift 4bits  in Encode()
102 …  *dest++ = ENCODE_TABLE[((src[1] & 0x0f) << 2) | (src[2] >> 6)]; // 2: shift 2bits, 6: shift 6bits  in Encode()
112             *dest++ = ENCODE_TABLE[src[0] >> 2]; // 2: shift 2bits  in Encode()
113             *dest++ = ENCODE_TABLE[((src[0] & 0x03) << 4) | (src[1] >> 4)]; // 4: shift 4bits  in Encode()
114             *dest++ = ENCODE_TABLE[((src[1] & 0x0f) << 2)]; // 2: shift 2bits  in Encode()
118             *dest++ = ENCODE_TABLE[src[0] >> 2]; // 2: shift 2bits  in Encode()
119             *dest++ = ENCODE_TABLE[((src[0] & 0x03) << 4)]; // 4: shift 4bits  in Encode()