summaryrefslogtreecommitdiffstats
path: root/c/src/libnetworking/machine/endian.h
diff options
context:
space:
mode:
authorJoel Sherrill <joel.sherrill@OARcorp.com>1998-08-20 14:37:17 +0000
committerJoel Sherrill <joel.sherrill@OARcorp.com>1998-08-20 14:37:17 +0000
commit3f098aed4500da38db8afdff111f02198158203a (patch)
tree370225501caf56821883daa3971214b3d82e28bb /c/src/libnetworking/machine/endian.h
parentc197b6c2ec838f1c9e37804c43774b3864bf9ba3 (diff)
downloadrtems-3f098aed4500da38db8afdff111f02198158203a.tar.bz2
FreeBSD stack compiles for the first time (except libc/strsep.c).
Diffstat (limited to 'c/src/libnetworking/machine/endian.h')
-rw-r--r--c/src/libnetworking/machine/endian.h60
1 files changed, 60 insertions, 0 deletions
diff --git a/c/src/libnetworking/machine/endian.h b/c/src/libnetworking/machine/endian.h
new file mode 100644
index 0000000000..cd0d6f551c
--- /dev/null
+++ b/c/src/libnetworking/machine/endian.h
@@ -0,0 +1,60 @@
+#ifndef _MACHINE_ENDIAN_H_
+#define _MACHINE_ENDIAN_H_
+
+#include <rtems/score/cpu.h>
+
+/*
+ * BSD-style endian declaration
+ */
+#define BIG_ENDIAN 4321
+#define LITTLE_ENDIAN 1234
+
+#if CPU_BIG_ENDIAN
+# define BYTE_ORDER BIG_ENDIAN
+#elif CPU_LITTLE_ENDIAN
+# define BYTE_ORDER LITTLE_ENDIAN
+#else
+# error "Can't decide which end is which!"
+#endif
+
+#if ( CPU_HAS_OWN_HOST_TO_NETWORK_ROUTINES == FALSE )
+
+#if ( CPU_BIG_ENDIAN == TRUE )
+
+/*
+ * Very simply on big endian CPUs
+ */
+
+#define ntohl(_x) (_x)
+#define ntohs(_x) (_x)
+#define htonl(_x) (_x)
+#define htons(_x) (_x)
+
+#define NTOHS(x)
+#define HTONS(x)
+#define NTOHL(x)
+#define HTONL(x)
+
+#elif ( CPU_LITTLE_ENDIAN == TRUE )
+
+/*
+ * A little more complicated on little endian CPUs
+ */
+
+#define ntohl(_x) ((long) CPU_swap_u32((unsigned32)_x))
+#define ntohs(_x) ((short) CPU_swap_u16((unsigned16)_x))
+#define htonl(_x) ((long) CPU_swap_u32((unsigned32)_x))
+#define htons(_x) ((short) CPU_swap_u16((unsigned16)_x))
+
+#define NTOHS(x) (x) = ntohs(x)
+#define HTONS(x) (x) = htons(x)
+#define NTOHL(x) (x) = ntohl(x)
+#define HTONL(x) (x) = htonl(x)
+
+#else
+#error "Unknown endian-ness for this cpu"
+#endif
+
+#endif /* CPU_HAS_OWN_HOST_TO_NETWORK_ROUTINES */
+
+#endif /* _MACHINE_ENDIAN_H_ */