From 690ad7280e655654a3bcca2ca5ced9caacf75c8b Mon Sep 17 00:00:00 2001
From: Mike Buland <eichlan@xagasoft.com>
Date: Tue, 22 May 2012 15:45:16 +0000
Subject: Added libbu++ endianness support.  It's probably not as fast as
 system endianness, but on gnu it'll use the libc versions, if you don't have
 those, at least libbu++ will compile.

---
 src/config.h                | 111 ++++++++++++++++++++++++++++++++++++++++++--
 src/experimental/blowfish.h |   1 +
 2 files changed, 107 insertions(+), 5 deletions(-)

diff --git a/src/config.h b/src/config.h
index 8a79166..fa304bb 100644
--- a/src/config.h
+++ b/src/config.h
@@ -18,13 +18,114 @@
 #include "bu/extratypes.h"
 
 #ifndef WIN32
-#include "bu/autoconfig.h"
+# include "bu/autoconfig.h"
 #else
-#define	__LITTLE_ENDIAN	1234
-#define	__BIG_ENDIAN	4321
-#define	__PDP_ENDIAN	3412
-#define __BYTE_ORDER __LITTLE_ENDIAN
+# define	__LITTLE_ENDIAN	1234
+# define	__BIG_ENDIAN	4321
+# define	__PDP_ENDIAN	3412
+# define __BYTE_ORDER __LITTLE_ENDIAN
+
+# ifndef LITTLE_ENDIAN
+#  define LITTLE_ENDIAN __LITTLE_ENDIAN
+# endif
+# ifndef BIG_ENDIAN
+#  define BIG_ENDIAN __BIG_ENDIAN
+# endif
+# ifndef PDP_ENDIAN
+#  define PDP_ENDIAN __PDP_ENDIAN
+# endif
+# ifndef BYTE_ORDER
+#  define BYTE_ORDER __BYTE_ORDER
+# endif
 #endif
 
+// At this point the system endian.h should be included, but if it's missing
+// an endian conversion macro, lets fix that now...
+
+#define bu_byte_swap16(x) (((x&0xffu)<<8)|((x&0xff00u)>>8))
+#define bu_byte_swap32(x) (((x&0xfful)<<24)|((x&0xff00ul)<<8)|((x&0xff0000ul)>>8)|((x&0xff000000ul)>>24))
+#define bu_byte_swap64(x) (((x&0xffull)<<56)|((x&0xff00ull)<<40)|((x&0xff0000ull)<<24)|((x&0xff000000ull)<<8)|((x&0xff00000000000000ull)>>56)|((x&0xff000000000000ull)>>40)|((x&0xff0000000000ull)>>24)|((x&0xff00000000ull)>>8))
+
+#if BYTE_ORDER == LITTLE_ENDIAN
+# ifndef  htobe16
+#  define htobe16(x) bu_byte_swap16(x)
+# endif
+# ifndef  htole16
+#  define htole16(x) (x)
+# endif
+# ifndef  be16toh
+#  define be16toh(x) bu_byte_swap16(x)
+# endif
+# ifndef  le16toh
+#  define le16toh(x) (x)
+# endif
+
+# ifndef  htobe32
+#  define htobe32(x) bu_byte_swap32(x)
+# endif
+# ifndef  htole32
+#  define htole32(x) (x)
+# endif
+# ifndef  be32toh
+#  define be32toh(x) bu_byte_swap32(x)
+# endif
+# ifndef  le32toh
+#  define le32toh(x) (x)
+# endif
+
+# ifndef  htobe64
+#  define htobe64(x) bu_byte_swap64(x)
+# endif
+# ifndef  htole64
+#  define htole64(x) (x)
+# endif
+# ifndef  be64toh
+#  define be64toh(x) bu_byte_swap64(x)
+# endif
+# ifndef  le64toh
+#  define le64toh(x) (x)
+# endif
+#elif BYTE_ORDER == BIG_ENDIAN
+# ifndef  htole16
+#  define htole16(x) bu_byte_swap16(x)
+# endif
+# ifndef  htobe16
+#  define htobe16(x) (x)
+# endif
+# ifndef  le16toh
+#  define le16toh(x) bu_byte_swap16(x)
+# endif
+# ifndef  be16toh
+#  define be16toh(x) (x)
+# endif
+
+# ifndef  htole32
+#  define htole32(x) bu_byte_swap32(x)
+# endif
+# ifndef  htobe32
+#  define htobe32(x) (x)
+# endif
+# ifndef  le32toh
+#  define le32toh(x) bu_byte_swap32(x)
+# endif
+# ifndef  be32toh
+#  define be32toh(x) (x)
+# endif
+
+# ifndef  htole64
+#  define htole64(x) bu_byte_swap64(x)
+# endif
+# ifndef  htobe64
+#  define htobe64(x) (x)
+# endif
+# ifndef  le64toh
+#  define le64toh(x) bu_byte_swap64(x)
+# endif
+# ifndef  be64toh
+#  define be64toh(x) (x)
+# endif
+#else
+#error Unhandled endianness detected
+#endif
 
 #endif
diff --git a/src/experimental/blowfish.h b/src/experimental/blowfish.h
index 7e816ca..c2a8be5 100644
--- a/src/experimental/blowfish.h
+++ b/src/experimental/blowfish.h
@@ -8,6 +8,7 @@
 #ifndef BU_BLOWFISH_H
 #define BU_BLOWFISH_H
 
+#include "bu/config.h"
 #include "bu/cipher.h"
 
 #include "bu/ciphermodeecb.h"
-- 
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