//小端转大端
int little2big(int le) {
return (le & 0xff) << 24
| (le & 0xff00) << 8
| (le & 0xff0000) >> 8
| (le >> 24) & 0xff;
}
//大端转小端
int big2little(int be)
{
return ((be >> 24) &0xff )
| ((be >> 8) & 0xFF00)
| ((be << 8) & 0xFF0000)
| ((be << 24));
}
short大小端转换
小端转大端
short little2bigs(short num)
{
short swapped = (num >> 8) | (num << 8);
return swapped;
}
大端转小端
short big2littles(short be)
{
short swapped = (be << 8) | (be >> 8);
return swapped;
}
32大端转小端原理
swapped = ((num>>24)&0xff) | // move byte 3 to byte 0
((num<<8)&0xff0000) | // move byte 1 to byte 2
((num>>8)&0xff00) | // move byte 2 to byte 1
((num<<24)&0xff000000); // byte 0 to byte 3
内置函数(传入大端转小端,小端转大端,以下同理)
16位无符号,大小端转换
unsigned short _byteswap_ushort(unsigned short
32位无符号,大小端转换
unsigned long _byteswap_ulong(unsigned long
64位无符号,大小端转换
unsigned __int64 _byteswap_uint64(unsigned __int64 value);
convert big endian to little endian in C [without using provided func]
Converting Little Endian to Big Endian
How do I convert between big-endian and little-endian values in C++?