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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [libnetworking/] [machine/] [endian.h] - Rev 173
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/* * $Id: endian.h,v 1.2 2001-09-27 12:01:53 chris Exp $ */ #ifndef _MACHINE_ENDIAN_H_ #define _MACHINE_ENDIAN_H_ #include <rtems/score/cpu.h> /* * BSD-style endian declaration */ #define BIG_ENDIAN 4321 #define LITTLE_ENDIAN 1234 #if CPU_BIG_ENDIAN # define BYTE_ORDER BIG_ENDIAN #elif CPU_LITTLE_ENDIAN # define BYTE_ORDER LITTLE_ENDIAN #else # error "Can't decide which end is which!" #endif #if ( CPU_HAS_OWN_HOST_TO_NETWORK_ROUTINES == FALSE ) #if ( CPU_BIG_ENDIAN == TRUE ) /* * Very simply on big endian CPUs */ #define ntohl(_x) (_x) #define ntohs(_x) (_x) #define htonl(_x) (_x) #define htons(_x) (_x) #define NTOHS(x) #define HTONS(x) #define NTOHL(x) #define HTONL(x) #elif ( CPU_LITTLE_ENDIAN == TRUE ) /* * A little more complicated on little endian CPUs */ #define ntohl(_x) ((long) CPU_swap_u32((unsigned32)_x)) #define ntohs(_x) ((short) CPU_swap_u16((unsigned16)_x)) #define htonl(_x) ((long) CPU_swap_u32((unsigned32)_x)) #define htons(_x) ((short) CPU_swap_u16((unsigned16)_x)) #define NTOHS(x) (x) = ntohs(x) #define HTONS(x) (x) = htons(x) #define NTOHL(x) (x) = ntohl(x) #define HTONL(x) (x) = htonl(x) #else #error "Unknown endian-ness for this cpu" #endif #endif /* CPU_HAS_OWN_HOST_TO_NETWORK_ROUTINES */ #endif /* _MACHINE_ENDIAN_H_ */