diff options
Diffstat (limited to 'inet/netinet/in.h')
| -rw-r--r-- | inet/netinet/in.h | 35 |
1 files changed, 31 insertions, 4 deletions
diff --git a/inet/netinet/in.h b/inet/netinet/in.h index 33f88064e1..ac0d167287 100644 --- a/inet/netinet/in.h +++ b/inet/netinet/in.h @@ -210,9 +210,13 @@ struct ipv6_mreq this was a short-sighted decision since on different systems the types may have different representations but the values are always the same. */ +extern u_int32_t __ntohl __P ((u_int32_t __netlong)); extern u_int32_t ntohl __P ((u_int32_t __netlong)); +extern u_int16_t __ntohs __P ((u_int16_t __netshort)); extern u_int16_t ntohs __P ((u_int16_t __netshort)); +extern u_int32_t __htonl __P ((u_int32_t __hostlong)); extern u_int32_t htonl __P ((u_int32_t __hostlong)); +extern u_int16_t __htons __P ((u_int16_t __hostshort)); extern u_int16_t htons __P ((u_int16_t __hostshort)); #include <endian.h> @@ -220,10 +224,33 @@ extern u_int16_t htons __P ((u_int16_t __hostshort)); #if __BYTE_ORDER == __BIG_ENDIAN /* The host byte order is the same as network byte order, so these functions are all just identity. */ -#define ntohl(x) (x) -#define ntohs(x) (x) -#define htonl(x) (x) -#define htons(x) (x) +# define ntohl(x) (x) +# define ntohs(x) (x) +# define htonl(x) (x) +# define htons(x) (x) +#else +# if __BYTE_ORDER == __LITTLE_ENDIAN && defined __OPTIMIZE__ +# define ntohl(x) (__builtin_constant_p (x) \ + ? __constant_htontohl (x) : __ntohl (x)) +# define ntohs(x) (__builtin_constant_p (x) \ + ? __constant_htontohs (x) : __ntohs (x)) +# define htonl(x) (__builtin_constant_p (x) \ + ? __constant_htontohl (x) : __htonl (x)) +# define htons(x) (__builtin_constant_p (x) \ + ? __constant_htontohl (x) : __htonl (x)) + +# define __constant_htontohl(x) \ + ((((x) & 0xff000000) >> 24) | \ + (((x) & 0x00ff0000) >> 8) | \ + (((x) & 0x0000ff00) << 8) | \ + (((x) & 0x000000ff) << 24)) +# define __constant_htontohs(x) \ + ((((x) & 0x0000ff00) >> 8) | \ + (((x) & 0x000000ff) << 8)) + +/* Now get machine dependent optimized versions for the real work. */ +# include <bits/htontoh.h> +# endif #endif #define IN6_IS_ADDR_UNSPECIFIED(a) \ |