fs/ntfs/types.h

   1 /*
   2  *  types.h
   3  *  This file defines four things:
   4  *   - generic platform independent fixed-size types (e.g. ntfs_u32)
   5  *   - specific fixed-size types (e.g. ntfs_offset_t)
   6  *   - macros that read and write those types from and to byte arrays
   7  *   - types derived from OS specific ones
   8  *
   9  *  Copyright (C) 1996 Martin von Löwis
  10  */
  11
  12 #ifdef NTFS_IN_LINUX_KERNEL
  13 /* get installed types if we compile the kernel*/
  14 #include <linux/fs.h>
  15 #endif
  16
  17 #if defined(i386) || defined(__i386__) || defined(__alpha__)
  18
  19 /* unsigned integral types */
  20 #ifndef NTFS_INTEGRAL_TYPES
  21 #define NTFS_INTEGRAL_TYPES
  22 typedef unsigned char      ntfs_u8;
  23 typedef unsigned short     ntfs_u16;
  24 typedef unsigned int       ntfs_u32;
  25 typedef unsigned long long ntfs_u64;
  26 #endif
  27
  28 /* unicode character type */
  29 #ifndef NTFS_WCHAR_T
  30 #define NTFS_WCHAR_T
  31 typedef unsigned short     ntfs_wchar_t;
  32 #endif
  33 /* file offset */
  34 #ifndef NTFS_OFFSET_T
  35 #define NTFS_OFFSET_T
  36 typedef unsigned long long ntfs_offset_t;
  37 #endif
  38 /* UTC */
  39 #ifndef NTFS_TIME64_T
  40 #define NTFS_TIME64_T
  41 typedef unsigned long long ntfs_time64_t;
  42 #endif
  43 /* This is really unsigned long long. So we support only volumes up to 2 TB */
  44 #ifndef NTFS_CLUSTER_T
  45 #define NTFS_CLUSTER_T
  46 typedef unsigned int ntfs_cluster_t;
  47 #endif
  48
  49 /* Macros reading unsigned integers from a byte pointer */
  50 /* these should work for all little endian machines */
  51 #define NTFS_GETU8(p)      (*(ntfs_u8*)(p))
  52 #define NTFS_GETU16(p)     (*(ntfs_u16*)(p))
  53 #define NTFS_GETU24(p)     (NTFS_GETU32(p) & 0xFFFFFF)
  54 #define NTFS_GETU32(p)     (*(ntfs_u32*)(p))
  55 #define NTFS_GETU64(p)     (*(ntfs_u64*)(p))
  56
  57 /* Macros writing unsigned integers */
  58 #define NTFS_PUTU8(p,v)      (*(ntfs_u8*)(p))=(v)
  59 #define NTFS_PUTU16(p,v)     (*(ntfs_u16*)(p))=(v)
  60 #define NTFS_PUTU24(p,v)     NTFS_PUTU16(p,(v) & 0xFFFF);\
  61                              NTFS_PUTU8(((char*)p)+2,(v)>>16)
  62 #define NTFS_PUTU32(p,v)     (*(ntfs_u32*)(p))=(v)
  63 #define NTFS_PUTU64(p,v)     (*(ntfs_u64*)(p))=(v)
  64
  65 /* Macros reading signed integers, returning int */
  66 #define NTFS_GETS8(p)        ((int)(*(char*)(p)))
  67 #define NTFS_GETS16(p)       ((int)(*(short*)(p)))
  68 #define NTFS_GETS24(p)       (NTFS_GETU24(p) < 0x800000 ? (int)NTFS_GETU24(p) : (int)(NTFS_GETU24(p) | 0xFF000000))
  69
  70 #define NTFS_PUTS8(p,v)      NTFS_PUTU8(p,v)
  71 #define NTFS_PUTS16(p,v)     NTFS_PUTU16(p,v)
  72 #define NTFS_PUTS24(p,v)     NTFS_PUTU24(p,v)
  73 #define NTFS_PUTS32(p,v)     NTFS_PUTU32(p,v)
  74
  75 #else
  76 #error Put your machine description here
  77 #endif
  78
  79 /* architecture independent macros */
  80
  81 /* PUTU32 would not clear all bytes */
  82 #define NTFS_PUTINUM(p,i)    NTFS_PUTU64(p,i->i_number);\
  83                              NTFS_PUTU16(((char*)p)+6,i->sequence_number)
  84
  85 /* system dependent types */
  86 #ifdef __linux__
  87 /* We always need kernel types, because glibc makes them of different size */
  88 #include <asm/posix_types.h>
  89 /* Avoid a type redefinition with future include of glibc <stdlib.h> */
  90 #undef __FD_ZERO
  91 #undef __FD_SET
  92 #undef __FD_CLR
  93 #undef __FD_ISSET
  94 #ifndef NTMODE_T
  95 #define NTMODE_T
  96 typedef __kernel_mode_t ntmode_t;
  97 #endif
  98 #ifndef NTFS_UID_T
  99 #define NTFS_UID_T
 100 typedef __kernel_uid_t ntfs_uid_t;
 101 #endif
 102 #ifndef NTFS_GID_T
 103 #define NTFS_GID_T
 104 typedef __kernel_gid_t ntfs_gid_t;
 105 #endif
 106 #ifndef NTFS_SIZE_T
 107 #define NTFS_SIZE_T
 108 typedef __kernel_size_t ntfs_size_t;
 109 #endif
 110 #ifndef NTFS_TIME_T
 111 #define NTFS_TIME_T
 112 typedef __kernel_time_t ntfs_time_t;
 113 #endif
 114 #else
 115 #include <sys/types.h>
 116 #include <sys/stat.h>
 117 typedef mode_t ntmode_t;
 118 typedef uid_t ntfs_uid_t;
 119 typedef gid_t ntfs_gid_t;
 120 typedef size_t ntfs_size_t;
 121 typedef time_t ntfs_time_t;
 122 #endif
 123
 124 /*
 125  * Local variables:
 126  * c-file-style: "linux"
 127  * End:
 128  */