xnu-1504.15.3.tar.gz

[apple/xnu.git] / libkern / libkern / OSByteOrder.h

diff --git a/libkern/libkern/OSByteOrder.h b/libkern/libkern/OSByteOrder.h
index 85819b680007fe0939583baaebc8140daf7bbd12..cb12cb31a509d11c58cd79a927472916438582aa 100644 (file)
--- a/libkern/libkern/OSByteOrder.h
+++ b/libkern/libkern/OSByteOrder.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -30,27 +30,12 @@
 #define _OS_OSBYTEORDER_H
 
 #include <stdint.h>
+#include <libkern/_OSByteOrder.h>
 
 /* Macros for swapping constant values in the preprocessing stage. */
-#define OSSwapConstInt16(x) \
-    ((uint16_t)((((uint16_t)(x) & 0xff00) >> 8) | \
-                (((uint16_t)(x) & 0x00ff) << 8)))
-
-#define OSSwapConstInt32(x) \
-    ((uint32_t)((((uint32_t)(x) & 0xff000000) >> 24) | \
-                (((uint32_t)(x) & 0x00ff0000) >>  8) | \
-                (((uint32_t)(x) & 0x0000ff00) <<  8) | \
-                (((uint32_t)(x) & 0x000000ff) << 24)))
-
-#define OSSwapConstInt64(x) \
-    ((uint64_t)((((uint64_t)(x) & 0xff00000000000000ULL) >> 56) | \
-                (((uint64_t)(x) & 0x00ff000000000000ULL) >> 40) | \
-                (((uint64_t)(x) & 0x0000ff0000000000ULL) >> 24) | \
-                (((uint64_t)(x) & 0x000000ff00000000ULL) >>  8) | \
-                (((uint64_t)(x) & 0x00000000ff000000ULL) <<  8) | \
-                (((uint64_t)(x) & 0x0000000000ff0000ULL) << 24) | \
-                (((uint64_t)(x) & 0x000000000000ff00ULL) << 40) | \
-                (((uint64_t)(x) & 0x00000000000000ffULL) << 56)))
+#define OSSwapConstInt16(x)    __DARWIN_OSSwapConstInt16(x)
+#define OSSwapConstInt32(x)    __DARWIN_OSSwapConstInt32(x)
+#define OSSwapConstInt64(x)    __DARWIN_OSSwapConstInt64(x)
 
 #if defined(__GNUC__)
 
@@ -62,27 +47,16 @@
 #include <libkern/machine/OSByteOrder.h>
 #endif
 
-#define OSSwapInt16(x) \
-    (__builtin_constant_p(x) ? OSSwapConstInt16(x) : _OSSwapInt16(x))
-
-#define OSSwapInt32(x) \
-    (__builtin_constant_p(x) ? OSSwapConstInt32(x) : _OSSwapInt32(x))
-
-#define OSSwapInt64(x) \
-    (__builtin_constant_p(x) ? OSSwapConstInt64(x) : _OSSwapInt64(x))
-
 #else /* ! __GNUC__ */
 
 #include <libkern/machine/OSByteOrder.h>
 
-#define OSSwapInt16(x) OSSwapConstInt16(x)
-
-#define OSSwapInt32(x) OSSwapConstInt32(x)
-
-#define OSSwapInt64(x) OSSwapConstInt64(x)
-
 #endif /* __GNUC__ */
 
+#define OSSwapInt16(x) __DARWIN_OSSwapInt16(x)
+#define OSSwapInt32(x) __DARWIN_OSSwapInt32(x)
+#define OSSwapInt64(x) __DARWIN_OSSwapInt64(x)
+
 enum {
     OSUnknownByteOrder,
     OSLittleEndian,
@@ -205,9 +179,9 @@ _OSWriteInt64(
 
 /* Host endianess to big endian byte swapping macros for constants. */
 
-#define OSSwapHostToBigConstInt16(x) (x)
-#define OSSwapHostToBigConstInt32(x) (x)
-#define OSSwapHostToBigConstInt64(x) (x)
+#define OSSwapHostToBigConstInt16(x) ((uint16_t)(x))
+#define OSSwapHostToBigConstInt32(x) ((uint32_t)(x))
+#define OSSwapHostToBigConstInt64(x) ((uint64_t)(x))
 
 /* Generic host endianess to big endian byte swapping functions. */
 
@@ -229,9 +203,9 @@ _OSWriteInt64(
 
 /* Big endian to host endianess byte swapping macros for constants. */
     
-#define OSSwapBigToHostConstInt16(x) (x)
-#define OSSwapBigToHostConstInt32(x) (x)
-#define OSSwapBigToHostConstInt64(x) (x)
+#define OSSwapBigToHostConstInt16(x) ((uint16_t)(x))
+#define OSSwapBigToHostConstInt32(x) ((uint32_t)(x))
+#define OSSwapBigToHostConstInt64(x) ((uint64_t)(x))
 
 /* Generic big endian to host endianess byte swapping functions. */
 
@@ -291,9 +265,9 @@ _OSWriteInt64(
 
 /* Host endianess to little endian byte swapping macros for constants. */
 
-#define OSSwapHostToLittleConstInt16(x) (x)
-#define OSSwapHostToLittleConstInt32(x) (x)
-#define OSSwapHostToLittleConstInt64(x) (x) 
+#define OSSwapHostToLittleConstInt16(x) ((uint16_t)(x))
+#define OSSwapHostToLittleConstInt32(x) ((uint32_t)(x))
+#define OSSwapHostToLittleConstInt64(x) ((uint64_t)(x)) 
 
 /* Generic host endianess to little endian byte swapping functions. */
 
@@ -315,9 +289,9 @@ _OSWriteInt64(
 
 /* Little endian to host endianess byte swapping macros for constants. */
 
-#define OSSwapLittleToHostConstInt16(x) (x)
-#define OSSwapLittleToHostConstInt32(x) (x)
-#define OSSwapLittleToHostConstInt64(x) (x)
+#define OSSwapLittleToHostConstInt16(x) ((uint16_t)(x))
+#define OSSwapLittleToHostConstInt32(x) ((uint32_t)(x))
+#define OSSwapLittleToHostConstInt64(x) ((uint64_t)(x))
 
 /* Generic little endian to host endianess byte swapping functions. */