include/arpa/nameser.h

   1 #include <resolv/arpa/nameser.h>
   2
   3 /* If the machine allows unaligned access we can do better than using
   4    the NS_GET16, NS_GET32, NS_PUT16, and NS_PUT32 macros from the
   5    installed header.  */
   6 #include <string.h>
   7 #include <stdint.h>
   8 #include <netinet/in.h>
   9
  10 #if _STRING_ARCH_unaligned
  11
  12 # undef NS_GET16
  13 # define NS_GET16(s, cp) \
  14   do {                                                                        \
  15     uint16_t *t_cp = (uint16_t *) (cp);                                       \
  16     (s) = ntohs (*t_cp);                                                      \
  17     (cp) += NS_INT16SZ;                                                       \
  18   } while (0)
  19
  20 # undef NS_GET32
  21 # define NS_GET32(l, cp) \
  22   do {                                                                        \
  23     uint32_t *t_cp = (uint32_t *) (cp);                                       \
  24     (l) = ntohl (*t_cp);                                                      \
  25     (cp) += NS_INT32SZ;                                                       \
  26   } while (0)
  27
  28 # undef NS_PUT16
  29 # define NS_PUT16(s, cp) \
  30   do {                                                                        \
  31     uint16_t *t_cp = (uint16_t *) (cp);                                       \
  32     *t_cp = htons (s);                                                        \
  33     (cp) += NS_INT16SZ;                                                       \
  34   } while (0)
  35
  36 # undef NS_PUT32
  37 # define NS_PUT32(l, cp) \
  38   do {                                                                        \
  39     uint32_t *t_cp = (uint32_t *) (cp);                                       \
  40     *t_cp = htonl (l);                                                        \
  41     (cp) += NS_INT32SZ;                                                       \
  42   } while (0)
  43
  44 #endif