(MFC) Encode Integer to Hex or Base64 using N Bytes

Demonstrates how to write an integer to N bytes (little-endian or big-endian) and return the bytes in any encoding such as hex, base64, etc.

Note: This example requires Chilkat v9.5.0.77 or greater.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkCrypt2.h>

void ChilkatSample(void)
    {
    CkString strOut;

    CkCrypt2 crypt;

    // 1193046 decimal is equal to 0x123456 hex.
    int value = 1193046;

    // Write the integer in 8 bytes using little-endian byte-order and return as hex
    bool bLittleEndian = true;
    const char *s = crypt.encodeInt(value,8,bLittleEndian,"hex");
    // The output is: 5634120000000000
    strOut.append(s);
    strOut.append("\r\n");

    // Now use big-endian...
    bLittleEndian = false;
    s = crypt.encodeInt(value,8,bLittleEndian,"hex");
    // The output is: 0000000000123456
    strOut.append(s);
    strOut.append("\r\n");

    // Instead of hex, get the 8 bytes using base64.
    s = crypt.encodeInt(value,8,bLittleEndian,"base64");
    // The output is: AAAAAAASNFY=
    strOut.append(s);
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }