/* * Copyright 2003-2008, Axel Dörfler, axeld@pinc-software.de. * Distributed under the terms of the MIT License. */ #ifndef BFS_ENDIAN_H #define BFS_ENDIAN_H #include "system_dependencies.h" #if !defined(BFS_LITTLE_ENDIAN_ONLY) && !defined(BFS_BIG_ENDIAN_ONLY) // default setting; BFS is now primarily a little endian file system # define BFS_LITTLE_ENDIAN_ONLY #endif #if defined(BFS_LITTLE_ENDIAN_ONLY) && defined(BFS_BIG_ENDIAN_ONLY) # error Building BFS with both big and little endian is not supported. #endif #if defined(BFS_LITTLE_ENDIAN_ONLY) && B_HOST_IS_LENDIAN \ || defined(BFS_BIG_ENDIAN_ONLY) && B_HOST_IS_BENDIAN /* host is BFS endian */ # define BFS_NATIVE_ENDIAN # define BFS_ENDIAN_TO_HOST_INT16(value) (value) # define BFS_ENDIAN_TO_HOST_INT32(value) (value) # define BFS_ENDIAN_TO_HOST_INT64(value) (value) # define HOST_ENDIAN_TO_BFS_INT16(value) (value) # define HOST_ENDIAN_TO_BFS_INT32(value) (value) # define HOST_ENDIAN_TO_BFS_INT64(value) (value) #elif defined(BFS_LITTLE_ENDIAN_ONLY) && B_HOST_IS_BENDIAN \ || defined(BFS_BIG_ENDIAN_ONLY) && B_HOST_IS_LENDIAN /* host is big endian, BFS is little endian or vice versa */ # define BFS_ENDIAN_TO_HOST_INT16(value) __swap_int16(value) # define BFS_ENDIAN_TO_HOST_INT32(value) __swap_int32(value) # define BFS_ENDIAN_TO_HOST_INT64(value) __swap_int64(value) # define HOST_ENDIAN_TO_BFS_INT16(value) __swap_int16(value) # define HOST_ENDIAN_TO_BFS_INT32(value) __swap_int32(value) # define HOST_ENDIAN_TO_BFS_INT64(value) __swap_int64(value) #else // TODO: maybe build a version that supports both, big & little endian? // But since that will need some kind of global data (to // know of what type this file system is), it's probably // something for the boot loader; anything else would be // a major pain. #endif #endif /* BFS_ENDIAN_H */
