fix trac ticket 104, by fixing the endianess byte switching headers. fix based on the bsd-licensed xorg code.

git-svn-id: http://svn.code.sf.net/p/navit/code/trunk/navit@1065 ffa7fe5e-494d-0410-b361-a75ebd5db220

1 files changed, 58 insertions, 28 deletions

diff --git a/navit/endianess.h b/navit/endianess.h
index 3764dd731..69c33a7bc 100644
--- a/navit/endianess.h
+++ b/navit/endianess.h
@@ -1,36 +1,66 @@
 #ifndef __ENDIANESS_HANDLER__
 
-#ifndef __APPLE__
- #include <endian.h>
+  /* The following is based on xorg/xserver/GL/glx/glxbyteorder.h 
+   * which is (c) IBM Corp. 2006,2007 and originally licensed under the following
+   * BSD-license. All modifications in navit are licensed under the GNU GPL as 
+   * described in file "COPYRIGHT".
+   * --------------------------
+   * Permission is hereby granted, free of charge, to any person obtaining a
+   * copy of this software and associated documentation files (the "Software"),
+   * to deal in the Software without restriction, including without limitation
+   * the rights to use, copy, modify, merge, publish, distribute, sub license,
+   * and/or sell copies of the Software, and to permit persons to whom the
+   * Software is furnished to do so, subject to the following conditions:
+   * 
+   * The above copyright notice and this permission notice (including the next
+   * paragraph) shall be included in all copies or substantial portions of the
+   * Software.
+   * 
+   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
+   * THE COPYRIGHT HOLDERS, THE AUTHORS, AND/OR THEIR SUPPLIERS BE LIABLE FOR
+   * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+   * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
+   * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+   */
+
+#if HAVE_BYTESWAP_H
+  /* machine dependent versions of byte swapping functions.  GNU extension.*/
+  #include <byteswap.h>
+#elif defined(USE_SYS_ENDIAN_H)
+  #include <sys/endian.h>
+#elif defined(__APPLE__)
+  #include <libkern/OSByteOrder.h>
+  #define __bswap_16 OSSwapInt16
+  #define __bswap_32 OSSwapInt32
+  #define __bswap_64 OSSwapInt64
 #else
- # include <machine/endian.h>
+  #define __bswap_16(value)  \
+      ((((value) & 0xff) << 8) | ((value) >> 8))
+  #define __bswap_32(value) \
+      (((uint32_t)bswap_16((uint16_t)((value) & 0xffff)) << 16) | \
+      (uint32_t)bswap_16((uint16_t)((value) >> 16)))
+  #define __bswap_64(value) \
+      (((uint64_t)bswap_32((uint32_t)((value) & 0xffffffff)) \
+         << 32) | \
+      (uint64_t)bswap_32((uint32_t)((value) >> 32)))
 #endif
 
-/* Get machine dependent optimized versions of byte swapping functions.  */
-#include <byteswap.h>
-
-#ifdef __OPTIMIZE__
-/* We can optimize calls to the conversion functions.  Either nothing has
-   to be done or we are using directly the byte-swapping functions which
-   often can be inlined.  */
-
-	#if __BYTE_ORDER == __BIG_ENDIAN
-		#define le16_to_cpu(x)	__bswap_16 (x)
-		#define le32_to_cpu(x)	__bswap_32 (x)
-		#define le64_to_cpu(x)	__bswap_64 (x)
-		#define cpu_to_le16(x)	__bswap_16 (x)
-		#define cpu_to_le32(x)	__bswap_32 (x)
-		#define cpu_to_le64(x)	__bswap_64 (x)
-	#else
-		#if __BYTE_ORDER == __LITTLE_ENDIAN
-			#define le16_to_cpu(x)	(x)
-			#define le32_to_cpu(x)	(x)
-			#define cpu_to_le16(x)	(x)
-			#define cpu_to_le16(x)	(x)
-		#else
-			#error "Unknown endianess"
-		#endif
-	#endif
+#if __BYTE_ORDER == __BIG_ENDIAN
+  #define le16_to_cpu(x)	__bswap_16 (x)
+  #define le32_to_cpu(x)	__bswap_32 (x)
+  #define le64_to_cpu(x)	__bswap_64 (x)
+  #define cpu_to_le16(x)	__bswap_16 (x)
+  #define cpu_to_le32(x)	__bswap_32 (x)
+  #define cpu_to_le64(x)	__bswap_64 (x)
+#elif __BYTE_ORDER == __LITTLE_ENDIAN
+  #define le16_to_cpu(x)	(x)
+  #define le32_to_cpu(x)	(x)
+  #define cpu_to_le16(x)	(x)
+  #define cpu_to_le16(x)	(x)
+#else
+  #error "Unknown endianess"
 #endif
 
 #define __ENDIANESS_HANDLER__