|
typedef unsigned short int uint16;
typedef unsigned long int uint32;
// 短整型大小端互换
#define BigLittleSwap16(A) ((((uint16)(A) & 0xff00) >> 8) | /
(((uint16)(A) & 0x00ff) << 8))
// 长整型大小端互换
#define BigLittleSwap32(A) ((((uint32)(A) & 0xff000000) >> 24) | /
(((uint32)(A) & 0x00ff0000) >> 8) | /
(((uint32)(A) & 0x0000ff00) << 8) | /
(((uint32)(A) & 0x000000ff) << 24))
// 本机大端返回1，小端返回0
int checkCPUendian()
{
union{
unsigned long int i;
unsigned char s[4];
}c = {0x12345678};
return (0x12 == c.s[0]);
}
// 模拟htonl函数，本机字节序转网络字节序
#define HtoNl(A) (checkCPUendian() ? (A) : BigLittleSwap32(A))
// 模拟ntohl函数，网络字节序转本机字节序
#define NtoHl(A) HtoNl(A)
// 模拟htons函数，本机字节序转网络字节序
#define HtoNs(A) (checkCPUendian() ? (A) : BigLittleSwap16(A))
// 模拟ntohs函数，网络字节序转本机字节序
#define NtoHs(A) HtoNs(A) | 
转播
