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 */ 17 typedef 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 113 extern "C" { 114 #endif 115 116 extern status_t swap_data(type_code type, void *data, size_t length, 117 swap_action action); 118 extern bool is_type_swapped(type_code type); 119 120 121 /* Private implementations */ 122 extern double __swap_double(double arg); 123 extern float __swap_float(float arg); 124 extern uint64 __swap_int64(uint64 arg); 125 extern uint32 __swap_int32(uint32 arg); 126 extern uint16 __swap_int16(uint16 arg); 127 128 #ifdef __cplusplus 129 } 130 #endif 131 132 #endif /* _BYTEORDER_H */ 133