/*
- * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
#error XFS_BIG_FILESYSTEMS must be defined true or false
#endif
+#ifdef __KERNEL__
+
+#include <asm/byteorder.h>
+
+#ifdef __LITTLE_ENDIAN
+# define __BYTE_ORDER __LITTLE_ENDIAN
+#endif
+#ifdef __BIG_ENDIAN
+# define __BYTE_ORDER __BIG_ENDIAN
+#endif
+
+#endif /* __KERNEL__ */
+
+/* do we need conversion? */
+
+#define ARCH_NOCONVERT 1
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define ARCH_CONVERT 0
+#else
+#define ARCH_CONVERT ARCH_NOCONVERT
+#endif
+
+/* generic swapping macros */
+
+#define INT_SWAP16(type,var) ((typeof(type))(__swab16((__u16)(var))))
+#define INT_SWAP32(type,var) ((typeof(type))(__swab32((__u32)(var))))
+#define INT_SWAP64(type,var) ((typeof(type))(__swab64((__u64)(var))))
+
+#define INT_SWAP(type, var) \
+ ((sizeof(type) == 8) ? INT_SWAP64(type,var) : \
+ ((sizeof(type) == 4) ? INT_SWAP32(type,var) : \
+ ((sizeof(type) == 2) ? INT_SWAP16(type,var) : \
+ (var))))
+
+#define INT_SWAP_UNALIGNED_32(from,to) \
+ { \
+ ((__u8*)(to))[0] = ((__u8*)(from))[3]; \
+ ((__u8*)(to))[1] = ((__u8*)(from))[2]; \
+ ((__u8*)(to))[2] = ((__u8*)(from))[1]; \
+ ((__u8*)(to))[3] = ((__u8*)(from))[0]; \
+ }
+
+#define INT_SWAP_UNALIGNED_64(from,to) \
+ { \
+ INT_SWAP_UNALIGNED_32( ((__u8*)(from)) + 4, ((__u8*)(to))); \
+ INT_SWAP_UNALIGNED_32( ((__u8*)(from)), ((__u8*)(to)) + 4); \
+ }
+
+/*
+ * get and set integers from potentially unaligned locations
+ */
+
+#define INT_GET_UNALIGNED_16_LE(pointer) \
+ ((__u16)((((__u8*)(pointer))[0] ) | (((__u8*)(pointer))[1] << 8 )))
+#define INT_GET_UNALIGNED_16_BE(pointer) \
+ ((__u16)((((__u8*)(pointer))[0] << 8) | (((__u8*)(pointer))[1])))
+#define INT_SET_UNALIGNED_16_LE(pointer,value) \
+ { \
+ ((__u8*)(pointer))[0] = (((value) ) & 0xff); \
+ ((__u8*)(pointer))[1] = (((value) >> 8) & 0xff); \
+ }
+#define INT_SET_UNALIGNED_16_BE(pointer,value) \
+ { \
+ ((__u8*)(pointer))[0] = (((value) >> 8) & 0xff); \
+ ((__u8*)(pointer))[1] = (((value) ) & 0xff); \
+ }
+
+#define INT_GET_UNALIGNED_32_LE(pointer) \
+ ((__u32)((((__u8*)(pointer))[0] ) | (((__u8*)(pointer))[1] << 8 ) \
+ |(((__u8*)(pointer))[2] << 16) | (((__u8*)(pointer))[3] << 24)))
+#define INT_GET_UNALIGNED_32_BE(pointer) \
+ ((__u32)((((__u8*)(pointer))[0] << 24) | (((__u8*)(pointer))[1] << 16) \
+ |(((__u8*)(pointer))[2] << 8) | (((__u8*)(pointer))[3] )))
+
+#define INT_GET_UNALIGNED_64_LE(pointer) \
+ (((__u64)(INT_GET_UNALIGNED_32_LE(((__u8*)(pointer))+4)) << 32 ) \
+ |((__u64)(INT_GET_UNALIGNED_32_LE(((__u8*)(pointer)) )) ))
+#define INT_GET_UNALIGNED_64_BE(pointer) \
+ (((__u64)(INT_GET_UNALIGNED_32_BE(((__u8*)(pointer)) )) << 32 ) \
+ |((__u64)(INT_GET_UNALIGNED_32_BE(((__u8*)(pointer))+4)) ))
+
+/*
+ * now pick the right ones for our MACHINE ARCHITECTURE
+ */
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define INT_GET_UNALIGNED_16(pointer) INT_GET_UNALIGNED_16_LE(pointer)
+#define INT_SET_UNALIGNED_16(pointer,value) INT_SET_UNALIGNED_16_LE(pointer,value)
+#define INT_GET_UNALIGNED_32(pointer) INT_GET_UNALIGNED_32_LE(pointer)
+#define INT_GET_UNALIGNED_64(pointer) INT_GET_UNALIGNED_64_LE(pointer)
+#else
+#define INT_GET_UNALIGNED_16(pointer) INT_GET_UNALIGNED_16_BE(pointer)
+#define INT_SET_UNALIGNED_16(pointer,value) INT_SET_UNALIGNED_16_BE(pointer,value)
+#define INT_GET_UNALIGNED_32(pointer) INT_GET_UNALIGNED_32_BE(pointer)
+#define INT_GET_UNALIGNED_64(pointer) INT_GET_UNALIGNED_64_BE(pointer)
+#endif
+
+/* define generic INT_ macros */
+
+#define INT_GET(reference,arch) \
+ (((arch) == ARCH_NOCONVERT) \
+ ? \
+ (reference) \
+ : \
+ INT_SWAP((reference),(reference)) \
+ )
+
+/* does not return a value */
+#define INT_SET(reference,arch,valueref) \
+ (__builtin_constant_p(valueref) ? \
+ (void)( (reference) = ( ((arch) != ARCH_NOCONVERT) ? (INT_SWAP((reference),(valueref))) : (valueref)) ) : \
+ (void)( \
+ ((reference) = (valueref)), \
+ ( ((arch) != ARCH_NOCONVERT) ? (reference) = INT_SWAP((reference),(reference)) : 0 ) \
+ ) \
+ )
+
+/* does not return a value */
+#define INT_MOD_EXPR(reference,arch,code) \
+ (void)(((arch) == ARCH_NOCONVERT) \
+ ? \
+ ((reference) code) \
+ : \
+ ( \
+ (reference) = INT_GET((reference),arch) , \
+ ((reference) code), \
+ INT_SET(reference, arch, reference) \
+ ) \
+ )
+
+/* does not return a value */
+#define INT_MOD(reference,arch,delta) \
+ (void)( \
+ INT_MOD_EXPR(reference,arch,+=(delta)) \
+ )
+
+/*
+ * INT_COPY - copy a value between two locations with the
+ * _same architecture_ but _potentially different sizes_
+ *
+ * if the types of the two parameters are equal or they are
+ * in native architecture, a simple copy is done
+ *
+ * otherwise, architecture conversions are done
+ *
+ */
+
+/* does not return a value */
+#define INT_COPY(dst,src,arch) \
+ (void)( \
+ ((sizeof(dst) == sizeof(src)) || ((arch) == ARCH_NOCONVERT)) \
+ ? \
+ ((dst) = (src)) \
+ : \
+ INT_SET(dst, arch, INT_GET(src, arch)) \
+ )
+
+/*
+ * INT_XLATE - copy a value in either direction between two locations
+ * with different architectures
+ *
+ * dir < 0 - copy from memory to buffer (native to arch)
+ * dir > 0 - copy from buffer to memory (arch to native)
+ */
+
+/* does not return a value */
+#define INT_XLATE(buf,mem,dir,arch) {\
+ ASSERT(dir); \
+ if (dir>0) { \
+ (mem)=INT_GET(buf, arch); \
+ } else { \
+ INT_SET(buf, arch, mem); \
+ } \
+}
+
+#define INT_ISZERO(reference,arch) \
+ ((reference) == 0)
+
+#define INT_ZERO(reference,arch) \
+ ((reference) = 0)
+
+#define INT_GET_UNALIGNED_16_ARCH(pointer,arch) \
+ ( ((arch) == ARCH_NOCONVERT) \
+ ? \
+ (INT_GET_UNALIGNED_16(pointer)) \
+ : \
+ (INT_GET_UNALIGNED_16_BE(pointer)) \
+ )
+#define INT_SET_UNALIGNED_16_ARCH(pointer,value,arch) \
+ if ((arch) == ARCH_NOCONVERT) { \
+ INT_SET_UNALIGNED_16(pointer,value); \
+ } else { \
+ INT_SET_UNALIGNED_16_BE(pointer,value); \
+ }
+
#define DIRINO4_GET_ARCH(pointer,arch) \
( ((arch) == ARCH_NOCONVERT) \
? \
projects / thirdparty / xfsprogs-dev.git / blobdiff