Function decodeblock

imperative/src/impl/utils/base64.cpp:38–42

** decodeblock ** ** decode 4 '6-bit' characters into 3 8-bit binary bytes */

** decode 4 '6-bit' characters into 3 8-bit binary bytes
*/
void decodeblock(unsigned char in[4], unsigned char out[3]) {
    out[0] = (unsigned char)(in[0] << 2 | in[1] >> 4);
    out[1] = (unsigned char)(in[1] << 4 | in[2] >> 2);
    out[2] = (unsigned char)(((in[2] << 6) & 0xc0) | in[3]);
}

}  // namespace