EndianConverter.h

[詳解]

#ifndef __ENDIANCONVERTER_H__
#define __ENDIANCONVERTER_H__

class EndianConverter
{

public:

    static bool IsLittleEndian()
    {
        int x = 1;
        char ch = (*(char *)&x);
        return (ch != 0);
    }

    static s16 Convert(s16 Value, bool bForce = false)
    {
        if (IsLittleEndian() || bForce)
        {
            Value = (((Value << 8) & 0xFF00) | ((Value >> 8) & 0x00FF));
        }
        return Value;

    }

    static u16 Convert(u16 Value, bool bForce = false)
    {
        if (IsLittleEndian() || bForce)
        {
            Value = (((Value << 8) & 0xFF00) | ((Value >> 8) & 0x00FF));
        }
        return Value;

    }

    static s32 Convert(s32 Value, bool bForce = false)
    {
        if (IsLittleEndian() || bForce)
        {
            s16 Low, High;
            High = (Value & 0xFFFF0000) >> 16;
            Low = Value & 0x0000FFFF;
            Value = (Convert(Low, bForce) << 16) | Convert(High, bForce);
        }
        return Value;

    }

    static u32 Convert(u32 Value, bool bForce = false)
    {
        if (IsLittleEndian() || bForce)
        {
            u16 Low, High;
            High = (Value & 0xFFFF0000) >> 16;
            Low = Value & 0x0000FFFF;
            Value = (Convert(Low, bForce) << 16) | Convert(High, bForce);
        }
        return Value;
    }

    static float Convert(float Value, bool bForce = false)
    {
        union FloatConv
        {
            u32 u;
            float f;
        };
        
        FloatConv Conv;

        Conv.f = Value;
        Conv.u = Convert(Conv.u, bForce);

        return Conv.f;
    }

private:

    //暗黙で定義されるものの封印
    EndianConverter();
    EndianConverter(const EndianConverter &Arg);
    EndianConverter operator =(const EndianConverter &Arg);

};

#endif      //#ifndef __ENDIANCONVERTER_H__