检测机器的CPU的字节序(Big Endian OR Little Endian)

include

#include
// The CPU bytes order
enum TCPUArch {LITTLE_ENDIAN, BIG_ENDIAN, NONEIEEE};
int main(int argc, char *argv[])
{
    using namespace std;
    TCPUArch architecture;
    union
    {
        double f;
        unsigned int x[2];
    } testcpu;
    testcpu.f = 1.0;
    if( testcpu.x[1] == 0x3FF00000 )
        architecture = LITTLE_ENDIAN;
    else if( testcpu.x[0] == 0x3FF00000 )
        architecture = BIG_ENDIAN;
    else
        architecture = NONEIEEE;
    cout << architecture << endl;
    return 0;
}

 

 

Power PC的朋友试一下看看是否是BIG ENDIAN？

FROM:  http://blog.csdn.net/woyaoying/article/details/4333434