ntfsendian.h

来自「嵌入式系统设计与实例开发实验教材二源码 多线程应用程序设计 串行端口程序设计」· C头文件 代码 · 共 61 行

/*
 * ntfsendian.h
 *
 * Copyright (C) 1998, 1999 Martin von L鰓is
 * Copyright (C) 1998 Joseph Malicki
 * Copyright (C) 1999 Werner Seiler
 * Copyright (C) 2001 Anton Altaparmakov (AIA)
 */
#include <asm/byteorder.h>

#define CPU_TO_LE16(a) __cpu_to_le16(a)
#define CPU_TO_LE32(a) __cpu_to_le32(a)
#define CPU_TO_LE64(a) __cpu_to_le64(a)

#define LE16_TO_CPU(a) __cpu_to_le16(a)
#define LE32_TO_CPU(a) __cpu_to_le32(a)
#define LE64_TO_CPU(a) __cpu_to_le64(a)

#define NTFS_GETU8(p)      (*(ntfs_u8*)(p))
#define NTFS_GETU16(p)     ((ntfs_u16)LE16_TO_CPU(*(ntfs_u16*)(p)))
#define NTFS_GETU24(p)     ((ntfs_u32)NTFS_GETU16(p) | \
			   ((ntfs_u32)NTFS_GETU8(((char*)(p)) + 2) << 16))
#define NTFS_GETU32(p)     ((ntfs_u32)LE32_TO_CPU(*(ntfs_u32*)(p)))
#define NTFS_GETU40(p)     ((ntfs_u64)NTFS_GETU32(p) | \
			   (((ntfs_u64)NTFS_GETU8(((char*)(p)) + 4)) << 32))
#define NTFS_GETU48(p)     ((ntfs_u64)NTFS_GETU32(p) | \
			   (((ntfs_u64)NTFS_GETU16(((char*)(p)) + 4)) << 32))
#define NTFS_GETU56(p)     ((ntfs_u64)NTFS_GETU32(p) | \
			   (((ntfs_u64)NTFS_GETU24(((char*)(p)) + 4)) << 32))
#define NTFS_GETU64(p)     ((ntfs_u64)LE64_TO_CPU(*(ntfs_u64*)(p)))
 
 /* Macros writing unsigned integers */
#define NTFS_PUTU8(p,v)      ((*(ntfs_u8*)(p)) = (v))
#define NTFS_PUTU16(p,v)     ((*(ntfs_u16*)(p)) = CPU_TO_LE16(v))
#define NTFS_PUTU24(p,v)     NTFS_PUTU16(p, (v) & 0xFFFF);\
                             NTFS_PUTU8(((char*)(p)) + 2, (v) >> 16)
#define NTFS_PUTU32(p,v)     ((*(ntfs_u32*)(p)) = CPU_TO_LE32(v))
#define NTFS_PUTU64(p,v)     ((*(ntfs_u64*)(p)) = CPU_TO_LE64(v))
 
 /* Macros reading signed integers */
#define NTFS_GETS8(p)        ((*(ntfs_s8*)(p)))
#define NTFS_GETS16(p)       ((ntfs_s16)LE16_TO_CPU(*(short*)(p)))
#define NTFS_GETS24(p)       (NTFS_GETU24(p) < 0x800000 ? \
					(int)NTFS_GETU24(p) : \
					(int)(NTFS_GETU24(p) - 0x1000000))
#define NTFS_GETS32(p)       ((ntfs_s32)LE32_TO_CPU(*(int*)(p)))
#define NTFS_GETS40(p)       (((ntfs_s64)NTFS_GETU32(p)) | \
			     (((ntfs_s64)NTFS_GETS8(((char*)(p)) + 4)) << 32))
#define NTFS_GETS48(p)       (((ntfs_s64)NTFS_GETU32(p)) | \
			     (((ntfs_s64)NTFS_GETS16(((char*)(p)) + 4)) << 32))
#define NTFS_GETS56(p)       (((ntfs_s64)NTFS_GETU32(p)) | \
			     (((ntfs_s64)NTFS_GETS24(((char*)(p)) + 4)) << 32))
#define NTFS_GETS64(p)	     ((ntfs_s64)NTFS_GETU64(p))
 
#define NTFS_PUTS8(p,v)      NTFS_PUTU8(p,v)
#define NTFS_PUTS16(p,v)     NTFS_PUTU16(p,v)
#define NTFS_PUTS24(p,v)     NTFS_PUTU24(p,v)
#define NTFS_PUTS32(p,v)     NTFS_PUTU32(p,v)
#define NTFS_PUTS64(p,v)     NTFS_PUTU64(p,v)