1/* 2 * Copyright 2007, Haiku, Inc. All Rights Reserved. 3 * Distributed under the terms of the MIT License. 4 */ 5#ifndef _BYTEORDER_H 6#define _BYTEORDER_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/* BSD/networking macros */ 27#ifndef htonl 28# define htonl(x) B_HOST_TO_BENDIAN_INT32(x) 29# define ntohl(x) B_BENDIAN_TO_HOST_INT32(x) 30# define htons(x) B_HOST_TO_BENDIAN_INT16(x) 31# define ntohs(x) B_BENDIAN_TO_HOST_INT16(x) 32#endif 33 34/* always swap macros */ 35#define B_SWAP_DOUBLE(arg) __swap_double(arg) 36#define B_SWAP_FLOAT(arg) __swap_float(arg) 37#define B_SWAP_INT64(arg) __swap_int64(arg) 38#define B_SWAP_INT32(arg) __swap_int32(arg) 39#define B_SWAP_INT16(arg) __swap_int16(arg) 40 41#if BYTE_ORDER == __LITTLE_ENDIAN 42/* Host is little endian */ 43 44#define B_HOST_IS_LENDIAN 1 45#define B_HOST_IS_BENDIAN 0 46 47/* Host native to little endian */ 48#define B_HOST_TO_LENDIAN_DOUBLE(arg) (double)(arg) 49#define B_HOST_TO_LENDIAN_FLOAT(arg) (float)(arg) 50#define B_HOST_TO_LENDIAN_INT64(arg) (uint64)(arg) 51#define B_HOST_TO_LENDIAN_INT32(arg) (uint32)(arg) 52#define B_HOST_TO_LENDIAN_INT16(arg) (uint16)(arg) 53 54/* Little endian to host native */ 55#define B_LENDIAN_TO_HOST_DOUBLE(arg) (double)(arg) 56#define B_LENDIAN_TO_HOST_FLOAT(arg) (float)(arg) 57#define B_LENDIAN_TO_HOST_INT64(arg) (uint64)(arg) 58#define B_LENDIAN_TO_HOST_INT32(arg) (uint32)(arg) 59#define B_LENDIAN_TO_HOST_INT16(arg) (uint16)(arg) 60 61/* Host native to big endian */ 62#define B_HOST_TO_BENDIAN_DOUBLE(arg) __swap_double(arg) 63#define B_HOST_TO_BENDIAN_FLOAT(arg) __swap_float(arg) 64#define B_HOST_TO_BENDIAN_INT64(arg) __swap_int64(arg) 65#define B_HOST_TO_BENDIAN_INT32(arg) __swap_int32(arg) 66#define B_HOST_TO_BENDIAN_INT16(arg) __swap_int16(arg) 67 68/* Big endian to host native */ 69#define B_BENDIAN_TO_HOST_DOUBLE(arg) __swap_double(arg) 70#define B_BENDIAN_TO_HOST_FLOAT(arg) __swap_float(arg) 71#define B_BENDIAN_TO_HOST_INT64(arg) __swap_int64(arg) 72#define B_BENDIAN_TO_HOST_INT32(arg) __swap_int32(arg) 73#define B_BENDIAN_TO_HOST_INT16(arg) __swap_int16(arg) 74 75#else /* BYTE_ORDER */ 76/* Host is big endian */ 77 78#define B_HOST_IS_LENDIAN 0 79#define B_HOST_IS_BENDIAN 1 80 81/* Host native to little endian */ 82#define B_HOST_TO_LENDIAN_DOUBLE(arg) __swap_double(arg) 83#define B_HOST_TO_LENDIAN_FLOAT(arg) __swap_float(arg) 84#define B_HOST_TO_LENDIAN_INT64(arg) __swap_int64(arg) 85#define B_HOST_TO_LENDIAN_INT32(arg) __swap_int32(arg) 86#define B_HOST_TO_LENDIAN_INT16(arg) __swap_int16(arg) 87 88/* Little endian to host native */ 89#define B_LENDIAN_TO_HOST_DOUBLE(arg) __swap_double(arg) 90#define B_LENDIAN_TO_HOST_FLOAT(arg) __swap_float(arg) 91#define B_LENDIAN_TO_HOST_INT64(arg) __swap_int64(arg) 92#define B_LENDIAN_TO_HOST_INT32(arg) __swap_int32(arg) 93#define B_LENDIAN_TO_HOST_INT16(arg) __swap_int16(arg) 94 95/* Host native to big endian */ 96#define B_HOST_TO_BENDIAN_DOUBLE(arg) (double)(arg) 97#define B_HOST_TO_BENDIAN_FLOAT(arg) (float)(arg) 98#define B_HOST_TO_BENDIAN_INT64(arg) (uint64)(arg) 99#define B_HOST_TO_BENDIAN_INT32(arg) (uint32)(arg) 100#define B_HOST_TO_BENDIAN_INT16(arg) (uint16)(arg) 101 102/* Big endian to host native */ 103#define B_BENDIAN_TO_HOST_DOUBLE(arg) (double)(arg) 104#define B_BENDIAN_TO_HOST_FLOAT(arg) (float)(arg) 105#define B_BENDIAN_TO_HOST_INT64(arg) (uint64)(arg) 106#define B_BENDIAN_TO_HOST_INT32(arg) (uint32)(arg) 107#define B_BENDIAN_TO_HOST_INT16(arg) (uint16)(arg) 108 109#endif /* BYTE_ORDER */ 110 111 112#ifdef __cplusplus 113extern "C" { 114#endif 115 116extern status_t swap_data(type_code type, void *data, size_t length, 117 swap_action action); 118extern bool is_type_swapped(type_code type); 119 120 121/* Private implementations */ 122extern double __swap_double(double arg); 123extern float __swap_float(float arg); 124extern uint64 __swap_int64(uint64 arg); 125extern uint32 __swap_int32(uint32 arg); 126extern uint16 __swap_int16(uint16 arg); 127 128#ifdef __cplusplus 129} 130#endif 131 132#endif /* _BYTEORDER_H */ 133