Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/include/net/hton.h
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
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1 /* 2 The following macro definitions convert to and from the network standard byte 3 order. The macros with their name in lower case guarantee to evaluate their 4 argument exactly once. The function of the macros is encoded in their names; 5 htons means convert a (unsigned) short in host byte order to network byte order. 6 */ 7 8 #ifndef _NET__HTON_H 9 #define _NET__HTON_H 10 11 #include <minix/sys_config.h> 12 13 extern u16_t _tmp; 14 extern u32_t _tmp_l; 15 16 /* Find out about the byte order. */ 17 18 /* assume <minix/config.h> is included, let's check */ 19 #if (_MINIX_CHIP == 0) 20 #include "_MINIX_CHIP macro not set, include <minix/config.h>" 21 #endif 22 23 #if (_MINIX_CHIP == _CHIP_INTEL) 24 #define LITTLE_ENDIAN 1 25 #endif 26 27 #if (_MINIX_CHIP == _CHIP_M68000 || _MINIX_CHIP == _CHIP_SPARC) 28 #define BIG_ENDIAN 1 29 #endif 30 31 #if (LITTLE_ENDIAN) && (BIG_ENDIAN) 32 #include "both LITTLE_ENDIAN and BIG_ENDIAN are defined" 33 /* LITTLE_ENDIAN and BIG_ENDIAN are both defined */ 34 #endif 35 36 #if !(LITTLE_ENDIAN) && !(BIG_ENDIAN) 37 #include "neither LITTLE_ENDIAN nor BIG_ENDIAN is defined" 38 /* LITTLE_ENDIAN and BIG_ENDIAN are both NOT defined */ 39 #endif 40 41 #if LITTLE_ENDIAN 42 #define HTONS(x) ( ( (((unsigned short)(x)) >>8) & 0xff) | \ 43 ((((unsigned short)(x)) & 0xff)<<8) ) 44 #define NTOHS(x) ( ( (((unsigned short)(x)) >>8) & 0xff) | \ 45 ((((unsigned short)(x)) & 0xff)<<8) ) 46 #define HTONL(x) ((((x)>>24) & 0xffL) | (((x)>>8) & 0xff00L) | \ 47 (((x)<<8) & 0xff0000L) | (((x)<<24) & 0xff000000L)) 48 #define NTOHL(x) ((((x)>>24) & 0xffL) | (((x)>>8) & 0xff00L) | \ 49 (((x)<<8) & 0xff0000L) | (((x)<<24) & 0xff000000L)) 50 51 #if _WORD_SIZE > 2 52 #define htons(x) (_tmp=(x), ((_tmp>>8) & 0xff) | ((_tmp<<8) & 0xff00)) 53 #define ntohs(x) (_tmp=(x), ((_tmp>>8) & 0xff) | ((_tmp<<8) & 0xff00)) 54 #define htonl(x) (_tmp_l=(x), ((_tmp_l>>24) & 0xffL) | \ 55 ((_tmp_l>>8) & 0xff00L) | \ 56 ((_tmp_l<<8) & 0xff0000L) | ((_tmp_l<<24) & 0xff000000L)) 57 #define ntohl(x) (_tmp_l=(x), ((_tmp_l>>24) & 0xffL) \ 58 | ((_tmp_l>>8) & 0xff00L) | \ 59 ((_tmp_l<<8) & 0xff0000L) | ((_tmp_l<<24) & 0xff000000L)) 60 61 #else /* _WORD_SIZE == 2 */ 62 /* The above macros are too unwieldy for a 16-bit machine. */ 63 u16_t htons(u16_t x); 64 u16_t ntohs(u16_t x); 65 u32_t htonl(u32_t x); 66 u32_t ntohl(u32_t x); 67 #endif /* _WORD_SIZE == 2 */ 68 69 #endif /* LITTLE_ENDIAN */ 70 71 #if BIG_ENDIAN 72 #define htons(x) (x) 73 #define HTONS(x) (x) 74 #define ntohs(x) (x) 75 #define NTOHS(x) (x) 76 #define htonl(x) (x) 77 #define HTONL(x) (x) 78 #define ntohl(x) (x) 79 #define NTOHL(x) (x) 80 #endif /* BIG_ENDIAN */ 81 82 #endif /* _NET__HTON_H */
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