include: Add header for endianness

This adds a header for dealing with endianness in ouroboros. It is
extracted from the byte_order header in the library (which now
includes this header). It also exposes the functions ntohl, ntohll,
htonl and htonll, necessary for converting 32 and 64 bit values for
storage and retrieval from the RIB (which should store multi-byte
values in network byte order).

1 files changed, 1 insertions, 88 deletions

diff --git a/src/lib/byte_order.h b/src/lib/byte_order.h
index 364b06cc..a0c72cf5 100644
--- a/src/lib/byte_order.h
+++ b/src/lib/byte_order.h
@@ -40,62 +40,10 @@
  * or FITNESS FOR A PARTICULAR PURPOSE.  Use this program  at  your own risk!
  */
 
-/* byte_order.h */
 #ifndef OUROBOROS_BYTE_ORDER_H
 #define OUROBOROS_BYTE_ORDER_H
 
-#include <stdint.h>
-#include <unistd.h>
-#include <stdlib.h>
-
-#ifdef __GLIBC__
-#include <endian.h>
-#elif defined(__FreeBSD__)
-#include <sys/endian.h>
-#endif
-
-/* if x86 compatible cpu */
-#if defined(i386) || defined(__i386__) || defined(__i486__) || \
-        defined(__i586__) || defined(__i686__) || defined(__pentium__) || \
-        defined(__pentiumpro__) || defined(__pentium4__) ||             \
-        defined(__nocona__) || defined(prescott) || defined(__core2__) || \
-        defined(__k6__) || defined(__k8__) || defined(__athlon__) ||    \
-        defined(__amd64) || defined(__amd64__) ||                       \
-        defined(__x86_64) || defined(__x86_64__) || defined(_M_IX86) || \
-        defined(_M_AMD64) || defined(_M_IA64) || defined(_M_X64)
-/* detect if x86-64 instruction set is supported */
-# if defined(_LP64) || defined(__LP64__) || defined(__x86_64) || \
-        defined(__x86_64__) || defined(_M_AMD64) || defined(_M_X64)
-#  define CPU_X64
-# else
-#  define CPU_IA32
-# endif
-#endif
-
-/* detect CPU endianness */
-#if (defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && \
-     __BYTE_ORDER == __LITTLE_ENDIAN) ||                  \
-        defined(CPU_IA32) || defined(CPU_X64) ||                        \
-        defined(__ia64) || defined(__ia64__) || defined(__alpha__) ||   \
-        defined(_M_ALPHA) || defined(vax) || defined(MIPSEL) ||         \
-        defined(_ARM_) || defined(__arm__)
-#define CPU_LITTLE_ENDIAN
-#define IS_BIG_ENDIAN 0
-#define IS_LITTLE_ENDIAN 1
-#elif (defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) &&                \
-       __BYTE_ORDER == __BIG_ENDIAN) ||                                 \
-        defined(__sparc) || defined(__sparc__) || defined(sparc) ||     \
-        defined(_ARCH_PPC) || defined(_ARCH_PPC64) || defined(_POWER) || \
-        defined(__POWERPC__) || defined(POWERPC) || defined(__powerpc) || \
-        defined(__powerpc__) || defined(__powerpc64__) || defined(__ppc__) || \
-        defined(__hpux)  || defined(_MIPSEB) || defined(mc68000) ||     \
-        defined(__s390__) || defined(__s390x__) || defined(sel)
-#define CPU_BIG_ENDIAN
-#define IS_BIG_ENDIAN 1
-#define IS_LITTLE_ENDIAN 0
-#else
-# error "Can't detect CPU architecture."
-#endif
+#include <ouroboros/endian.h>
 
 #define IS_ALIGNED_32(p) (0 == (3 & ((const char*)(p) - (const char*)0)))
 #define IS_ALIGNED_64(p) (0 == (7 & ((const char*)(p) - (const char*)0)))
@@ -115,41 +63,6 @@
 unsigned rhash_ctz(unsigned); /* define as function */
 #endif
 
-#if defined(__GNUC__)  && (__GNUC__ >= 4) &&  \
-        (__GNUC__ > 4 || __GNUC_MINOR__ >= 3)
-/* for GCC >= 4.3 */
-#define bswap_32(x) __builtin_bswap32(x)
-#elif !defined(__STRICT_ANSI__)
-/* general bswap_32 definition */
-static inline uint32_t bswap_32(uint32_t x) {
-        x = ((x << 8) & 0xFF00FF00) | ((x >> 8) & 0x00FF00FF);
-        return (x >> 16) | (x << 16);
-}
-#else
-#define bswap_32(x) ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >>  8) | \
-                     (((x) & 0x0000ff00) <<  8) | (((x) & 0x000000ff) << 24))
-#endif /* bswap_32 */
-
-#if defined(__GNUC__) && (__GNUC__ >= 4) && \
-        (__GNUC__ > 4 || __GNUC_MINOR__ >= 3)
-#define bswap_64(x) __builtin_bswap64(x)
-#elif !defined (bswap64)
-#if !defined(__STRICT_ANSI__)
-static inline uint64_t bswap_64(uint64_t x) {
-        union {
-                uint64_t ll;
-                uint32_t l[2];
-        } w, r;
-        w.ll = x;
-        r.l[0] = bswap_32(w.l[1]);
-        r.l[1] = bswap_32(w.l[0]);
-        return r.ll;
-}
-#else
-#error "bswap_64 unsupported"
-#endif
-#endif
-
 #ifdef CPU_BIG_ENDIAN
 #define be2me_32(x) (x)
 #define be2me_64(x) (x)