1/* 2 * Copyright 2007, Haiku, Inc. All rights reserved. 3 * Distributed under the terms of the MIT License. 4 */ 5#ifndef _BYTE_ORDER_H 6#define _BYTE_ORDER_H 7 8 9#include <BeBuild.h> 10#include <endian.h> 11#include <SupportDefs.h> 12#include <TypeConstants.h> 13 /* for convenience */ 14 15 16/* swap directions */ 17typedef enum { 18 B_SWAP_HOST_TO_LENDIAN, 19 B_SWAP_HOST_TO_BENDIAN, 20 B_SWAP_LENDIAN_TO_HOST, 21 B_SWAP_BENDIAN_TO_HOST, 22 B_SWAP_ALWAYS 23} swap_action; 24 25 26/* always swap macros */ 27#define B_SWAP_DOUBLE(arg) __swap_double(arg) 28#define B_SWAP_FLOAT(arg) __swap_float(arg) 29#define B_SWAP_INT64(arg) __swap_int64(arg) 30#define B_SWAP_INT32(arg) __swap_int32(arg) 31#define B_SWAP_INT16(arg) __swap_int16(arg) 32 33#if BYTE_ORDER == __LITTLE_ENDIAN 34/* Host is little endian */ 35 36#define B_HOST_IS_LENDIAN 1 37#define B_HOST_IS_BENDIAN 0 38 39/* Host native to little endian */ 40#define B_HOST_TO_LENDIAN_DOUBLE(arg) (double)(arg) 41#define B_HOST_TO_LENDIAN_FLOAT(arg) (float)(arg) 42#define B_HOST_TO_LENDIAN_INT64(arg) (uint64)(arg) 43#define B_HOST_TO_LENDIAN_INT32(arg) (uint32)(arg) 44#define B_HOST_TO_LENDIAN_INT16(arg) (uint16)(arg) 45 46/* Little endian to host native */ 47#define B_LENDIAN_TO_HOST_DOUBLE(arg) (double)(arg) 48#define B_LENDIAN_TO_HOST_FLOAT(arg) (float)(arg) 49#define B_LENDIAN_TO_HOST_INT64(arg) (uint64)(arg) 50#define B_LENDIAN_TO_HOST_INT32(arg) (uint32)(arg) 51#define B_LENDIAN_TO_HOST_INT16(arg) (uint16)(arg) 52 53/* Host native to big endian */ 54#define B_HOST_TO_BENDIAN_DOUBLE(arg) __swap_double(arg) 55#define B_HOST_TO_BENDIAN_FLOAT(arg) __swap_float(arg) 56#define B_HOST_TO_BENDIAN_INT64(arg) __swap_int64(arg) 57#define B_HOST_TO_BENDIAN_INT32(arg) __swap_int32(arg) 58#define B_HOST_TO_BENDIAN_INT16(arg) __swap_int16(arg) 59 60/* Big endian to host native */ 61#define B_BENDIAN_TO_HOST_DOUBLE(arg) __swap_double(arg) 62#define B_BENDIAN_TO_HOST_FLOAT(arg) __swap_float(arg) 63#define B_BENDIAN_TO_HOST_INT64(arg) __swap_int64(arg) 64#define B_BENDIAN_TO_HOST_INT32(arg) __swap_int32(arg) 65#define B_BENDIAN_TO_HOST_INT16(arg) __swap_int16(arg) 66 67#else /* BYTE_ORDER */ 68/* Host is big endian */ 69 70#define B_HOST_IS_LENDIAN 0 71#define B_HOST_IS_BENDIAN 1 72 73/* Host native to little endian */ 74#define B_HOST_TO_LENDIAN_DOUBLE(arg) __swap_double(arg) 75#define B_HOST_TO_LENDIAN_FLOAT(arg) __swap_float(arg) 76#define B_HOST_TO_LENDIAN_INT64(arg) __swap_int64(arg) 77#define B_HOST_TO_LENDIAN_INT32(arg) __swap_int32(arg) 78#define B_HOST_TO_LENDIAN_INT16(arg) __swap_int16(arg) 79 80/* Little endian to host native */ 81#define B_LENDIAN_TO_HOST_DOUBLE(arg) __swap_double(arg) 82#define B_LENDIAN_TO_HOST_FLOAT(arg) __swap_float(arg) 83#define B_LENDIAN_TO_HOST_INT64(arg) __swap_int64(arg) 84#define B_LENDIAN_TO_HOST_INT32(arg) __swap_int32(arg) 85#define B_LENDIAN_TO_HOST_INT16(arg) __swap_int16(arg) 86 87/* Host native to big endian */ 88#define B_HOST_TO_BENDIAN_DOUBLE(arg) (double)(arg) 89#define B_HOST_TO_BENDIAN_FLOAT(arg) (float)(arg) 90#define B_HOST_TO_BENDIAN_INT64(arg) (uint64)(arg) 91#define B_HOST_TO_BENDIAN_INT32(arg) (uint32)(arg) 92#define B_HOST_TO_BENDIAN_INT16(arg) (uint16)(arg) 93 94/* Big endian to host native */ 95#define B_BENDIAN_TO_HOST_DOUBLE(arg) (double)(arg) 96#define B_BENDIAN_TO_HOST_FLOAT(arg) (float)(arg) 97#define B_BENDIAN_TO_HOST_INT64(arg) (uint64)(arg) 98#define B_BENDIAN_TO_HOST_INT32(arg) (uint32)(arg) 99#define B_BENDIAN_TO_HOST_INT16(arg) (uint16)(arg) 100 101#endif /* BYTE_ORDER */ 102 103 104#ifdef __cplusplus 105extern "C" { 106#endif /* __cplusplus */ 107 108extern status_t swap_data(type_code type, void *data, size_t length, 109 swap_action action); 110extern bool is_type_swapped(type_code type); 111 112/* Private implementations */ 113extern double __swap_double(double arg); 114extern float __swap_float(float arg); 115#if __GNUC__ >= 4 116#define __swap_int64(arg) (uint64)__builtin_bswap64(arg) 117#define __swap_int32(arg) (uint32)__builtin_bswap32(arg) 118#define __swap_int16(arg) (uint16)__builtin_bswap16(arg) 119#else 120extern uint64 __swap_int64(uint64 arg); 121extern uint32 __swap_int32(uint32 arg); 122extern uint16 __swap_int16(uint16 arg); 123#endif 124 125#ifdef __cplusplus 126} 127#endif /* __cplusplus */ 128 129#endif /* _BYTE_ORDER_H */ 130