4.104.114.84.95
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1 | /* |
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2 | * $Id$ |
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3 | */ |
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4 | |
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5 | #ifndef _MACHINE_ENDIAN_H_ |
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6 | #define _MACHINE_ENDIAN_H_ |
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7 | |
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8 | #include <rtems/score/cpu.h> |
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9 | |
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10 | /* |
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11 | * BSD-style endian declaration |
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12 | */ |
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13 | #define BIG_ENDIAN 4321 |
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14 | #define LITTLE_ENDIAN 1234 |
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15 | |
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16 | #if CPU_BIG_ENDIAN |
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17 | # define BYTE_ORDER BIG_ENDIAN |
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18 | #elif CPU_LITTLE_ENDIAN |
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19 | # define BYTE_ORDER LITTLE_ENDIAN |
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20 | #else |
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21 | # error "Can't decide which end is which!" |
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22 | #endif |
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23 | |
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24 | #if ( CPU_HAS_OWN_HOST_TO_NETWORK_ROUTINES == FALSE ) |
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25 | |
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26 | #if ( CPU_BIG_ENDIAN == TRUE ) |
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27 | |
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28 | /* |
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29 | * Very simply on big endian CPUs |
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30 | */ |
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31 | |
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32 | #define ntohl(_x) (_x) |
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33 | #define ntohs(_x) (_x) |
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34 | #define htonl(_x) (_x) |
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35 | #define htons(_x) (_x) |
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36 | |
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37 | #define NTOHS(x) |
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38 | #define HTONS(x) |
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39 | #define NTOHL(x) |
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40 | #define HTONL(x) |
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41 | |
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42 | #elif ( CPU_LITTLE_ENDIAN == TRUE ) |
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43 | |
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44 | /* |
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45 | * A little more complicated on little endian CPUs |
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46 | */ |
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47 | |
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48 | #define ntohl(_x) ((long) CPU_swap_u32((unsigned32)_x)) |
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49 | #define ntohs(_x) ((short) CPU_swap_u16((unsigned16)_x)) |
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50 | #define htonl(_x) ((long) CPU_swap_u32((unsigned32)_x)) |
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51 | #define htons(_x) ((short) CPU_swap_u16((unsigned16)_x)) |
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52 | |
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53 | #define NTOHS(x) (x) = ntohs(x) |
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54 | #define HTONS(x) (x) = htons(x) |
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55 | #define NTOHL(x) (x) = ntohl(x) |
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56 | #define HTONL(x) (x) = htonl(x) |
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57 | |
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58 | #else |
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59 | #error "Unknown endian-ness for this cpu" |
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60 | #endif |
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61 | |
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62 | #endif /* CPU_HAS_OWN_HOST_TO_NETWORK_ROUTINES */ |
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63 | |
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64 | #endif /* _MACHINE_ENDIAN_H_ */ |
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