/* * Copyright 2007, Haiku, Inc. All rights reserved. * Distributed under the terms of the MIT License. */ #ifndef _BYTE_ORDER_H #define _BYTE_ORDER_H #include #include #include #include /* for convenience */ /* swap directions */ typedef enum { B_SWAP_HOST_TO_LENDIAN, B_SWAP_HOST_TO_BENDIAN, B_SWAP_LENDIAN_TO_HOST, B_SWAP_BENDIAN_TO_HOST, B_SWAP_ALWAYS } swap_action; /* always swap macros */ #define B_SWAP_DOUBLE(arg) __swap_double(arg) #define B_SWAP_FLOAT(arg) __swap_float(arg) #define B_SWAP_INT64(arg) __swap_int64(arg) #define B_SWAP_INT32(arg) __swap_int32(arg) #define B_SWAP_INT16(arg) __swap_int16(arg) #if BYTE_ORDER == __LITTLE_ENDIAN /* Host is little endian */ #define B_HOST_IS_LENDIAN 1 #define B_HOST_IS_BENDIAN 0 /* Host native to little endian */ #define B_HOST_TO_LENDIAN_DOUBLE(arg) (double)(arg) #define B_HOST_TO_LENDIAN_FLOAT(arg) (float)(arg) #define B_HOST_TO_LENDIAN_INT64(arg) (uint64)(arg) #define B_HOST_TO_LENDIAN_INT32(arg) (uint32)(arg) #define B_HOST_TO_LENDIAN_INT16(arg) (uint16)(arg) /* Little endian to host native */ #define B_LENDIAN_TO_HOST_DOUBLE(arg) (double)(arg) #define B_LENDIAN_TO_HOST_FLOAT(arg) (float)(arg) #define B_LENDIAN_TO_HOST_INT64(arg) (uint64)(arg) #define B_LENDIAN_TO_HOST_INT32(arg) (uint32)(arg) #define B_LENDIAN_TO_HOST_INT16(arg) (uint16)(arg) /* Host native to big endian */ #define B_HOST_TO_BENDIAN_DOUBLE(arg) __swap_double(arg) #define B_HOST_TO_BENDIAN_FLOAT(arg) __swap_float(arg) #define B_HOST_TO_BENDIAN_INT64(arg) __swap_int64(arg) #define B_HOST_TO_BENDIAN_INT32(arg) __swap_int32(arg) #define B_HOST_TO_BENDIAN_INT16(arg) __swap_int16(arg) /* Big endian to host native */ #define B_BENDIAN_TO_HOST_DOUBLE(arg) __swap_double(arg) #define B_BENDIAN_TO_HOST_FLOAT(arg) __swap_float(arg) #define B_BENDIAN_TO_HOST_INT64(arg) __swap_int64(arg) #define B_BENDIAN_TO_HOST_INT32(arg) __swap_int32(arg) #define B_BENDIAN_TO_HOST_INT16(arg) __swap_int16(arg) #else /* BYTE_ORDER */ /* Host is big endian */ #define B_HOST_IS_LENDIAN 0 #define B_HOST_IS_BENDIAN 1 /* Host native to little endian */ #define B_HOST_TO_LENDIAN_DOUBLE(arg) __swap_double(arg) #define B_HOST_TO_LENDIAN_FLOAT(arg) __swap_float(arg) #define B_HOST_TO_LENDIAN_INT64(arg) __swap_int64(arg) #define B_HOST_TO_LENDIAN_INT32(arg) __swap_int32(arg) #define B_HOST_TO_LENDIAN_INT16(arg) __swap_int16(arg) /* Little endian to host native */ #define B_LENDIAN_TO_HOST_DOUBLE(arg) __swap_double(arg) #define B_LENDIAN_TO_HOST_FLOAT(arg) __swap_float(arg) #define B_LENDIAN_TO_HOST_INT64(arg) __swap_int64(arg) #define B_LENDIAN_TO_HOST_INT32(arg) __swap_int32(arg) #define B_LENDIAN_TO_HOST_INT16(arg) __swap_int16(arg) /* Host native to big endian */ #define B_HOST_TO_BENDIAN_DOUBLE(arg) (double)(arg) #define B_HOST_TO_BENDIAN_FLOAT(arg) (float)(arg) #define B_HOST_TO_BENDIAN_INT64(arg) (uint64)(arg) #define B_HOST_TO_BENDIAN_INT32(arg) (uint32)(arg) #define B_HOST_TO_BENDIAN_INT16(arg) (uint16)(arg) /* Big endian to host native */ #define B_BENDIAN_TO_HOST_DOUBLE(arg) (double)(arg) #define B_BENDIAN_TO_HOST_FLOAT(arg) (float)(arg) #define B_BENDIAN_TO_HOST_INT64(arg) (uint64)(arg) #define B_BENDIAN_TO_HOST_INT32(arg) (uint32)(arg) #define B_BENDIAN_TO_HOST_INT16(arg) (uint16)(arg) #endif /* BYTE_ORDER */ #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ extern status_t swap_data(type_code type, void *data, size_t length, swap_action action); extern bool is_type_swapped(type_code type); /* Private implementations */ extern double __swap_double(double arg); extern float __swap_float(float arg); #if __GNUC__ >= 4 #define __swap_int64(arg) (uint64)__builtin_bswap64(arg) #define __swap_int32(arg) (uint32)__builtin_bswap32(arg) #define __swap_int16(arg) (uint16)__builtin_bswap16(arg) #else extern uint64 __swap_int64(uint64 arg); extern uint32 __swap_int32(uint32 arg); extern uint16 __swap_int16(uint16 arg); #endif #ifdef __cplusplus } #endif /* __cplusplus */ #endif /* _BYTE_ORDER_H */