简而言之:
Big endian machine: It thinks the first byte it reads is the biggest.
Little endian machine: It thinks the first byte it reads is the littlest.
举个例子,从内存地址0x0000开始有以下数据
0x0000 0x12
0x0001 0x34
0x0002 0xab
0x0003 0xcd
如果我们去读取一个地址为0x0000的四个字节变量,若字节序为big-endian,则读出
结果为0x1234abcd;若字节序位little-endian,则读出结果为0xcdab3412.
如果我们将0x1234abcd写入到以0x0000开始的内存中,则结果为
big-endian little-endian
0x0000 0x12 0xcd
0x0001 0x23 0xab
0x0002 0xab 0x34
0x0003 0xcd 0x12
x86系列CPU都是little-endian的字节序.
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