Function encodeblock

imperative/src/impl/utils/base64.cpp:25–31

** encodeblock ** ** encode 3 8-bit binary bytes as 4 '6-bit' characters */

** encode 3 8-bit binary bytes as 4 '6-bit' characters
*/
void encodeblock(unsigned char in[3], unsigned char out[4], int len) {
    out[0] = cb64[in[0] >> 2];
    out[1] = cb64[((in[0] & 0x03) << 4) | ((in[1] & 0xf0) >> 4)];
    out[2] =
            (unsigned char)(len > 1 ? cb64[((in[1] & 0x0f) << 2) | ((in[2] & 0xc0) >> 6)] : '=');
    out[3] = (unsigned char)(len > 2 ? cb64[in[2] & 0x3f] : '=');
}

/*
** decodeblock