projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| add196b0 | 1 | /* |
| cbc50af1 | 2 | * Copyright (c) 1987, 1991 Regents of the University of California. |
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3 | * All rights reserved. |
| 4 | * | |
| 6dc0e27a | 5 | * %sccs.include.redist.c% |
| add196b0 | 6 | * |
| cbc50af1 | 7 | * @(#)endian.h 7.7 (Berkeley) %G% |
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8 | */ |
| 9 | ||
| 10 | /* | |
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11 | * Definitions for byte order, according to byte significance from low |
| 12 | * address to high. | |
| add196b0 | 13 | */ |
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14 | #define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ |
| 15 | #define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ | |
| 16 | #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ | |
| add196b0 | 17 | |
| 07f209ed | 18 | #define BYTE_ORDER BIG_ENDIAN |
| add196b0 | 19 | |
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20 | #ifndef KERNEL |
| 21 | #include <sys/cdefs.h> | |
| 22 | #endif | |
| 23 | ||
| 24 | __BEGIN_DECLS | |
| 25 | unsigned long htonl __P((unsigned long)); | |
| 26 | unsigned short htons __P((unsigned short)); | |
| 27 | unsigned long ntohl __P((unsigned long)); | |
| 28 | unsigned short ntohs __P((unsigned short)); | |
| 29 | __END_DECLS | |
| 30 | ||
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31 | /* |
| 32 | * Macros for network/external number representation conversion. | |
| 33 | */ | |
| dc7b7034 | 34 | #if BYTE_ORDER == BIG_ENDIAN && !defined(lint) |
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35 | #define ntohl(x) (x) |
| 36 | #define ntohs(x) (x) | |
| 37 | #define htonl(x) (x) | |
| 38 | #define htons(x) (x) | |
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39 | |
| 40 | #define NTOHL(x) (x) | |
| 41 | #define NTOHS(x) (x) | |
| 42 | #define HTONL(x) (x) | |
| 43 | #define HTONS(x) (x) | |
| 44 | ||
| add196b0 | 45 | #else |
| 6fdc2f43 | 46 | |
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47 | #define NTOHL(x) (x) = ntohl((u_long)x) |
| 48 | #define NTOHS(x) (x) = ntohs((u_short)x) | |
| 49 | #define HTONL(x) (x) = htonl((u_long)x) | |
| 50 | #define HTONS(x) (x) = htons((u_short)x) | |
| add196b0 | 51 | #endif |