1 /* This file is generated automatically by configure */ 2 /* It is valid only for the system type i386-apple-darwin10.4.0 */ 3 4 #ifndef __BYTEORDER_H 5 #define __BYTEORDER_H 6 7 /* ntohl and relatives live here */ 8 #include <arpa/inet.h> 9 10 /* Define generic byte swapping functions */ 11 #include <machine/byte_order.h> 12 #define swap16(x) NXSwapShort(x) 13 #define swap32(x) NXSwapLong(x) 14 #define swap64(x) NXSwapLongLong(x) 15 16 /* The byte swapping macros have the form: */ 17 /* EENN[a]toh or htoEENN[a] where EE is be (big endian) or */ 18 /* le (little-endian), NN is 16 or 32 (number of bits) and a, */ 19 /* if present, indicates that the endian side is a pointer to an */ 20 /* array of uint8_t bytes instead of an integer of the specified length. */ 21 /* h refers to the host's ordering method. */ 22 23 /* So, to convert a 32-bit integer stored in a buffer in little-endian */ 24 /* format into a uint32_t usable on this machine, you could use: */ 25 /* uint32_t value = le32atoh(&buf[3]); */ 26 /* To put that value back into the buffer, you could use: */ 27 /* htole32a(&buf[3], value); */ 28 29 /* Define aliases for the standard byte swapping macros */ 30 /* Arguments to these macros must be properly aligned on natural word */ 31 /* boundaries in order to work properly on all architectures */ 32 #ifndef htobe16 33 # define htobe16(x) htons(x) 34 #endif 35 #ifndef htobe32 36 # define htobe32(x) htonl(x) 37 #endif 38 #ifndef be16toh 39 # define be16toh(x) ntohs(x) 40 #endif 41 #ifndef be32toh 42 # define be32toh(x) ntohl(x) 43 #endif 44 45 #define HTOBE16(x) (x) = htobe16(x) 46 #define HTOBE32(x) (x) = htobe32(x) 47 #define BE32TOH(x) (x) = be32toh(x) 48 #define BE16TOH(x) (x) = be16toh(x) 49 50 /* On little endian machines, these macros are null */ 51 #ifndef htole16 52 # define htole16(x) (x) 53 #endif 54 #ifndef htole32 55 # define htole32(x) (x) 56 #endif 57 #ifndef htole64 58 # define htole64(x) (x) 59 #endif 60 #ifndef le16toh 61 # define le16toh(x) (x) 62 #endif 63 #ifndef le32toh 64 # define le32toh(x) (x) 65 #endif 66 #ifndef le64toh 67 # define le64toh(x) (x) 68 #endif 69 70 #define HTOLE16(x) (void) (x) 71 #define HTOLE32(x) (void) (x) 72 #define HTOLE64(x) (void) (x) 73 #define LE16TOH(x) (void) (x) 74 #define LE32TOH(x) (void) (x) 75 #define LE64TOH(x) (void) (x) 76 77 /* These don't have standard aliases */ 78 #ifndef htobe64 79 # define htobe64(x) swap64(x) 80 #endif 81 #ifndef be64toh 82 # define be64toh(x) swap64(x) 83 #endif 84 85 #define HTOBE64(x) (x) = htobe64(x) 86 #define BE64TOH(x) (x) = be64toh(x) 87 88 /* Define the C99 standard length-specific integer types */ 89 #include <stdint.h> 90 91 /* Here are some macros to create integers from a byte array */ 92 /* These are used to get and put integers from/into a uint8_t array */ 93 /* with a specific endianness. This is the most portable way to generate */ 94 /* and read messages to a network or serial device. Each member of a */ 95 /* packet structure must be handled separately. */ 96 97 /* The i386 and compatibles can handle unaligned memory access, */ 98 /* so use the optimized macros above to do this job */ 99 #ifndef be16atoh 100 # define be16atoh(x) be16toh(*(uint16_t*)(x)) 101 #endif 102 #ifndef be32atoh 103 # define be32atoh(x) be32toh(*(uint32_t*)(x)) 104 #endif 105 #ifndef be64atoh 106 # define be64atoh(x) be64toh(*(uint64_t*)(x)) 107 #endif 108 #ifndef le16atoh 109 # define le16atoh(x) le16toh(*(uint16_t*)(x)) 110 #endif 111 #ifndef le32atoh 112 # define le32atoh(x) le32toh(*(uint32_t*)(x)) 113 #endif 114 #ifndef le64atoh 115 # define le64atoh(x) le64toh(*(uint64_t*)(x)) 116 #endif 117 118 #ifndef htob16a 119 # define htobe16a(a,x) *(uint16_t*)(a) = htobe16(x) 120 #endif 121 #ifndef htobe32a 122 # define htobe32a(a,x) *(uint32_t*)(a) = htobe32(x) 123 #endif 124 #ifndef htobe64a 125 # define htobe64a(a,x) *(uint64_t*)(a) = htobe64(x) 126 #endif 127 #ifndef htole16a 128 # define htole16a(a,x) *(uint16_t*)(a) = htole16(x) 129 #endif 130 #ifndef htole32a 131 # define htole32a(a,x) *(uint32_t*)(a) = htole32(x) 132 #endif 133 #ifndef htole64a 134 # define htole64a(a,x) *(uint64_t*)(a) = htole64(x) 135 #endif 136 137 #endif /*__BYTEORDER_H*/ 138