ntfstypes.h

NTFS 磁盘系统 加载源代码

/*
 *  ntfstypes.h
 *
 *  Copyright (C) 1996 Martin von L鰓is
 */

/* This file defines four things:
   - generic platform independent fixed-size types (e.g. ntfs_u32)
   - specific fixed-size types (e.g. ntfs_offset_t)
   - macros that read and write those types from and to byte arrays
   - types derived from OS specific ones
*/

#if defined(i386) || defined(__i386__)

/* unsigned integral types */
typedef unsigned char      ntfs_u8;
typedef unsigned short     ntfs_u16;
typedef unsigned int       ntfs_u32;
typedef unsigned long long ntfs_u64;

/* unicode character type */
typedef unsigned short     ntfs_wchar_t;
/* file offset */
typedef unsigned long long ntfs_offset_t;
/* UTC */
typedef unsigned long long ntfs_time64_t;

/* Macros reading unsigned integers from a byte pointer */
/* these should work for all little endian machines */
#define NTFS_GETU8(p)      (*(ntfs_u8*)(p))
#define NTFS_GETU16(p)     (*(ntfs_u16*)(p))
#define NTFS_GETU24(p)     (NTFS_GETU32(p) & 0xFFFFFF)
#define NTFS_GETU32(p)     (*(ntfs_u32*)(p))
#define NTFS_GETU64(p)     (*(ntfs_u64*)(p))

/* Macros writing unsigned integers */
#define NTFS_PUTU8(p,v)      (*(ntfs_u8*)(p))=(v)
#define NTFS_PUTU16(p,v)     (*(ntfs_u16*)(p))=(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))=(v)
#define NTFS_PUTU64(p,v)     (*(ntfs_u64*)(p))=(v)

/* Macros reading signed integers, returning int */
#define NTFS_GETS8(p)        ((int)(*(char*)(p)))
#define NTFS_GETS16(p)       ((int)(*(short*)(p)))
#define NTFS_GETS24(p)       (NTFS_GETU24(p) < 0x800000 ? (int)NTFS_GETU24(p) : (int)(NTFS_GETU24(p) | 0xFF000000))

#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)

#else
#error Put your machine description here
#endif


/* system dependend types */
#ifdef __linux__
/* We always need the kernel types, because libc 6 makes them
   of different size */
#include <linux/types.h>
typedef __kernel_mode_t ntmode_t;
typedef __kernel_uid_t ntfs_uid_t;
typedef __kernel_gid_t ntfs_gid_t;
typedef __kernel_size_t ntfs_size_t;
typedef __kernel_time_t ntfs_time_t;
#else
#include <sys/types.h>
#include <sys/stat.h>
typedef mode_t ntmode_t;
typedef uid_t ntfs_uid_t;
typedef gid_t ntfs_gid_t;
typedef size_t ntfs_size_t;
typedef time_t ntfs_time_t;
#endif

/*
 * Local variables:
 * c-file-style: "linux"
 * End:
 */