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authorJakub Jelinek <jakub@redhat.com>2007-07-12 18:26:36 +0000
committerJakub Jelinek <jakub@redhat.com>2007-07-12 18:26:36 +0000
commit0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (patch)
tree2ea1f8305970753e4a657acb2ccc15ca3eec8e2c /include/arpa/nameser.h
parent7d58530341304d403a6626d7f7a1913165fe2f32 (diff)
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2.5-18.1
Diffstat (limited to 'include/arpa/nameser.h')
-rw-r--r--include/arpa/nameser.h45
1 files changed, 45 insertions, 0 deletions
diff --git a/include/arpa/nameser.h b/include/arpa/nameser.h
index 944fe732a6..efbe956602 100644
--- a/include/arpa/nameser.h
+++ b/include/arpa/nameser.h
@@ -1 +1,46 @@
#include <resolv/arpa/nameser.h>
+
+/* If the machine allows unaligned access we can do better than using
+ the NS_GET16, NS_GET32, NS_PUT16, and NS_PUT32 macros from the
+ installed header. */
+#include <string.h>
+#include <stdint.h>
+#include <netinet/in.h>
+
+extern struct _ns_flagdata _ns_flagdata[] attribute_hidden;
+
+#if _STRING_ARCH_unaligned
+
+# undef NS_GET16
+# define NS_GET16(s, cp) \
+ do { \
+ uint16_t *t_cp = (uint16_t *) (cp); \
+ (s) = ntohs (*t_cp); \
+ (cp) += NS_INT16SZ; \
+ } while (0)
+
+# undef NS_GET32
+# define NS_GET32(l, cp) \
+ do { \
+ uint32_t *t_cp = (uint32_t *) (cp); \
+ (l) = ntohl (*t_cp); \
+ (cp) += NS_INT32SZ; \
+ } while (0)
+
+# undef NS_PUT16
+# define NS_PUT16(s, cp) \
+ do { \
+ uint16_t *t_cp = (uint16_t *) (cp); \
+ *t_cp = htons (s); \
+ (cp) += NS_INT16SZ; \
+ } while (0)
+
+# undef NS_PUT32
+# define NS_PUT32(l, cp) \
+ do { \
+ uint32_t *t_cp = (uint32_t *) (cp); \
+ *t_cp = htonl (l); \
+ (cp) += NS_INT32SZ; \
+ } while (0)
+
+#endif