c代码小端（大端）字节序的判断方式

 

 1 inline tBool is_little_endian()
 2 {
 3     unsigned int i = 1;
 4     return *(char *)&i;
 5 }
 6 
 7 // network order to be big endian
 8 inline uint32_t htonl(uint32_t host32)
 9 {
10     if (!is_little_endian())
11         return host32;
12     return ((host32 & 0x000000ff) << 24)
13            | ((host32 & 0x0000ff00) << 8)
14            | ((host32 & 0x00ff0000) >> 8)
15            | ((host32 & 0xff000000) >> 24);
16 }
17 
18 inline uint16_t htons(uint16_t host16)
19 {
20     if (!is_little_endian())
21         return host16;
22     return ((host16 & 0xff) << 8) | ((host16 & 0xff00) >> 8);
23 }
24 
25 inline uint32_t ntohl(uint32_t net32)
26 {
27     return htonl(net32);
28 }
29 
30 inline uint16_t ntohs(uint16_t net16)
31 {
32     return htons(net16);
33 }
posted @ 2019-12-13 16:35  凌空a  阅读(439)  评论(0)    收藏  举报