A C++ demonstration class that forces values to be stored in MSB format, suitable for use with Berkeley DB

BdbOrderedInt.cpp

#include <cstring>

// Forces values to be stored in MSB format
// Assumes 32 bit int!
class BdbOrderedInt
{
private:
    unsigned char bytes[4];

public:
    BdbOrderedInt(int val)
    {
        setInt(val);
    }

    int getInt() const
    {
        int val = 0;
        for (int i=0; i<sizeof(bytes); i++)
        {
            val <<= 8;
            val |= bytes[i];
        }
        return val;
    }

    void setInt(int val)
    {
        for (int i=sizeof(bytes)-1; i>=0; i--)
        {
            bytes[i] = (val & 0xff);
            val >>= 8;
        }
    }

    void operator=(int val)
    {
        setInt(val);
    }

    operator int() const 
    {
        return getInt();
    }
    
    unsigned char *getBytes()
    {
        return bytes;
    }

    // Note: should return the same as sizeof(BdbOrderedInt)
    size_t getSize() const
    {
        return sizeof(int);
    }
};