byteorder.h

来自「学习嵌入式LINUX的好东西」· C头文件 代码 · 共 27 行

#ifndef _MAIN_H
#define _MAIN_H

// Byte swapping.
#define swap8(A)		(A)
#define swap16(A)		((((A)&0x00ff)<<8) | ((A)>>8))
#define swap32(A)		((((A)&0x000000ff)<<24) | (((A)&0x0000ff00)<<8) | (((A)&0x00ff0000)>>8) | (((A)&0xff000000)>>24))

#define htonl(x)		swap32(x)	// host to network, long
#define ntohl(x)		swap32(x)	// network to host, long
#define htons(x)		swap16(x)	// host to network, short
#define ntohs(x)		swap16(x)	// network to host, short

#define htobl(x)		swap32(x)	// host to big endian, long
#define btohl(x)		swap32(x)	// big endian to host, long
#define htobs(x)		swap32(x)	// host to big endian, short
#define btohs(x)		swap32(x)	// big endian to host, short

#define htoll(x)		(x)			// host to little endian, long
#define ltohl(x)		(x)			// little endian to host, long
#define htols(x)		(x)			// host to little endian, short
#define ltohs(x)		(x)			// little endian to host, short

#endif