45     uint32_t j = 0;  in Decode()  local
55             base64Char[j++] = v;  in Decode()
57             base64Char[j++] = '\0';  in Decode()
60         if (j == ENCODE_STR_LEN) {  in Decode()
67             j = 0;  in Decode()
97     uint32_t j = 0;  in Encode()  local
103         index = src[j] >> 2; // 2: shift 2bits  in Encode()
105         index = ((src[j] & 0x03) << 4) | (src[j + 1] >> 4); // 4: shift 4bits  in Encode()
107         index = ((src[j + 1] & 0x0F) << 2) | (src[j + 2] >> 6); // 2: shift 2bits, 6: shift 6bits  in Encode()
109         index = src[j + 2] & 0x3F; // 2: the second char  in Encode()
113         j += DECODE_STR_LEN;  in Encode()