Function EncodeBase64

src/utilstrencodings.cpp:98–139

}

string EncodeBase64(const unsigned char* pch, size_t len)
{
    static const char* pbase64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

    string strRet = "";
    strRet.reserve((len + 2) / 3 * 4);

    int mode = 0, left = 0;
    const unsigned char* pchEnd = pch + len;

    while (pch < pchEnd) {
        int enc = *(pch++);
        switch (mode) {
        case 0: // we have no bits
            strRet += pbase64[enc >> 2];
            left = (enc & 3) << 4;
            mode = 1;
            break;

        case 1: // we have two bits
            strRet += pbase64[left | (enc >> 4)];
            left = (enc & 15) << 2;
            mode = 2;
            break;

        case 2: // we have four bits
            strRet += pbase64[left | (enc >> 6)];
            strRet += pbase64[enc & 63];
            mode = 0;
            break;
        }
    }

    if (mode) {
        strRet += pbase64[left];
        strRet += '=';
        if (mode == 1)
            strRet += '=';
    }

    return strRet;
}

string EncodeBase64(const string& str)
{