bits/types.h

   1 /* bits/types.h -- definitions of __*_t types underlying *_t types.
   2    Copyright (C) 2002-2013 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 /*
  20  * Never include this file directly; use <sys/types.h> instead.
  21  */
  22
  23 #ifndef _BITS_TYPES_H
  24 #define _BITS_TYPES_H   1
  25
  26 #include <features.h>
  27 #include <bits/wordsize.h>
  28
  29 /* Convenience types.  */
  30 typedef unsigned char __u_char;
  31 typedef unsigned short int __u_short;
  32 typedef unsigned int __u_int;
  33 typedef unsigned long int __u_long;
  34
  35 /* Fixed-size types, underlying types depend on word size and compiler.  */
  36 typedef signed char __int8_t;
  37 typedef unsigned char __uint8_t;
  38 typedef signed short int __int16_t;
  39 typedef unsigned short int __uint16_t;
  40 typedef signed int __int32_t;
  41 typedef unsigned int __uint32_t;
  42 #if __WORDSIZE == 64
  43 typedef signed long int __int64_t;
  44 typedef unsigned long int __uint64_t;
  45 #else
  46 __extension__ typedef signed long long int __int64_t;
  47 __extension__ typedef unsigned long long int __uint64_t;
  48 #endif
  49
  50 /* quad_t is also 64 bits.  */
  51 #if __WORDSIZE == 64
  52 typedef long int __quad_t;
  53 typedef unsigned long int __u_quad_t;
  54 #else
  55 __extension__ typedef long long int __quad_t;
  56 __extension__ typedef unsigned long long int __u_quad_t;
  57 #endif
  58
  59
  60 /* The machine-dependent file <bits/typesizes.h> defines __*_T_TYPE
  61    macros for each of the OS types we define below.  The definitions
  62    of those macros must use the following macros for underlying types.
  63    We define __S<SIZE>_TYPE and __U<SIZE>_TYPE for the signed and unsigned
  64    variants of each of the following integer types on this machine.
  65
  66         16              -- "natural" 16-bit type (always short)
  67         32              -- "natural" 32-bit type (always int)
  68         64              -- "natural" 64-bit type (long or long long)
  69         LONG32          -- 32-bit type, traditionally long
  70         QUAD            -- 64-bit type, always long long
  71         WORD            -- natural type of __WORDSIZE bits (int or long)
  72         LONGWORD        -- type of __WORDSIZE bits, traditionally long
  73
  74    We distinguish WORD/LONGWORD, 32/LONG32, and 64/QUAD so that the
  75    conventional uses of `long' or `long long' type modifiers match the
  76    types we define, even when a less-adorned type would be the same size.
  77    This matters for (somewhat) portably writing printf/scanf formats for
  78    these types, where using the appropriate l or ll format modifiers can
  79    make the typedefs and the formats match up across all GNU platforms.  If
  80    we used `long' when it's 64 bits where `long long' is expected, then the
  81    compiler would warn about the formats not matching the argument types,
  82    and the programmer changing them to shut up the compiler would break the
  83    program's portability.
  84
  85    Here we assume what is presently the case in all the GCC configurations
  86    we support: long long is always 64 bits, long is always word/address size,
  87    and int is always 32 bits.  */
  88
  89 #define __S16_TYPE              short int
  90 #define __U16_TYPE              unsigned short int
  91 #define __S32_TYPE              int
  92 #define __U32_TYPE              unsigned int
  93 #define __SLONGWORD_TYPE        long int
  94 #define __ULONGWORD_TYPE        unsigned long int
  95 #if __WORDSIZE == 32
  96 # define __SQUAD_TYPE           __quad_t
  97 # define __UQUAD_TYPE           __u_quad_t
  98 # define __SWORD_TYPE           int
  99 # define __UWORD_TYPE           unsigned int
 100 # define __SLONG32_TYPE         long int
 101 # define __ULONG32_TYPE         unsigned long int
 102 # define __S64_TYPE             __quad_t
 103 # define __U64_TYPE             __u_quad_t
 104 /* We want __extension__ before typedef's that use nonstandard base types
 105    such as `long long' in C89 mode.  */
 106 # define __STD_TYPE             __extension__ typedef
 107 #elif __WORDSIZE == 64
 108 # define __SQUAD_TYPE           long int
 109 # define __UQUAD_TYPE           unsigned long int
 110 # define __SWORD_TYPE           long int
 111 # define __UWORD_TYPE           unsigned long int
 112 # define __SLONG32_TYPE         int
 113 # define __ULONG32_TYPE         unsigned int
 114 # define __S64_TYPE             long int
 115 # define __U64_TYPE             unsigned long int
 116 /* No need to mark the typedef with __extension__.   */
 117 # define __STD_TYPE             typedef
 118 #else
 119 # error
 120 #endif
 121 #include <bits/typesizes.h>     /* Defines __*_T_TYPE macros.  */
 122
 123
 124 __STD_TYPE __DEV_T_TYPE __dev_t;        /* Type of device numbers.  */
 125 __STD_TYPE __UID_T_TYPE __uid_t;        /* Type of user identifications.  */
 126 __STD_TYPE __GID_T_TYPE __gid_t;        /* Type of group identifications.  */
 127 __STD_TYPE __INO_T_TYPE __ino_t;        /* Type of file serial numbers.  */
 128 __STD_TYPE __INO64_T_TYPE __ino64_t;    /* Type of file serial numbers (LFS).*/
 129 __STD_TYPE __MODE_T_TYPE __mode_t;      /* Type of file attribute bitmasks.  */
 130 __STD_TYPE __NLINK_T_TYPE __nlink_t;    /* Type of file link counts.  */
 131 __STD_TYPE __OFF_T_TYPE __off_t;        /* Type of file sizes and offsets.  */
 132 __STD_TYPE __OFF64_T_TYPE __off64_t;    /* Type of file sizes and offsets (LFS).  */
 133 __STD_TYPE __PID_T_TYPE __pid_t;        /* Type of process identifications.  */
 134 __STD_TYPE __FSID_T_TYPE __fsid_t;      /* Type of file system IDs.  */
 135 __STD_TYPE __CLOCK_T_TYPE __clock_t;    /* Type of CPU usage counts.  */
 136 __STD_TYPE __RLIM_T_TYPE __rlim_t;      /* Type for resource measurement.  */
 137 __STD_TYPE __RLIM64_T_TYPE __rlim64_t;  /* Type for resource measurement (LFS).  */
 138 __STD_TYPE __ID_T_TYPE __id_t;          /* General type for IDs.  */
 139 __STD_TYPE __TIME_T_TYPE __time_t;      /* Seconds since the Epoch.  */
 140 __STD_TYPE __USECONDS_T_TYPE __useconds_t; /* Count of microseconds.  */
 141 __STD_TYPE __SUSECONDS_T_TYPE __suseconds_t; /* Signed count of microseconds.  */
 142
 143 __STD_TYPE __DADDR_T_TYPE __daddr_t;    /* The type of a disk address.  */
 144 __STD_TYPE __KEY_T_TYPE __key_t;        /* Type of an IPC key.  */
 145
 146 /* Clock ID used in clock and timer functions.  */
 147 __STD_TYPE __CLOCKID_T_TYPE __clockid_t;
 148
 149 /* Timer ID returned by `timer_create'.  */
 150 __STD_TYPE __TIMER_T_TYPE __timer_t;
 151
 152 /* Type to represent block size.  */
 153 __STD_TYPE __BLKSIZE_T_TYPE __blksize_t;
 154
 155 /* Types from the Large File Support interface.  */
 156
 157 /* Type to count number of disk blocks.  */
 158 __STD_TYPE __BLKCNT_T_TYPE __blkcnt_t;
 159 __STD_TYPE __BLKCNT64_T_TYPE __blkcnt64_t;
 160
 161 /* Type to count file system blocks.  */
 162 __STD_TYPE __FSBLKCNT_T_TYPE __fsblkcnt_t;
 163 __STD_TYPE __FSBLKCNT64_T_TYPE __fsblkcnt64_t;
 164
 165 /* Type to count file system nodes.  */
 166 __STD_TYPE __FSFILCNT_T_TYPE __fsfilcnt_t;
 167 __STD_TYPE __FSFILCNT64_T_TYPE __fsfilcnt64_t;
 168
 169 /* Type of miscellaneous file system fields.  */
 170 __STD_TYPE __FSWORD_T_TYPE __fsword_t;
 171
 172 __STD_TYPE __SSIZE_T_TYPE __ssize_t; /* Type of a byte count, or error.  */
 173
 174 /* Signed long type used in system calls.  */
 175 __STD_TYPE __SYSCALL_SLONG_TYPE __syscall_slong_t;
 176 /* Unsigned long type used in system calls.  */
 177 __STD_TYPE __SYSCALL_ULONG_TYPE __syscall_ulong_t;
 178
 179 /* These few don't really vary by system, they always correspond
 180    to one of the other defined types.  */
 181 typedef __off64_t __loff_t;     /* Type of file sizes and offsets (LFS).  */
 182 typedef __quad_t *__qaddr_t;
 183 typedef char *__caddr_t;
 184
 185 /* Duplicates info from stdint.h but this is used in unistd.h.  */
 186 __STD_TYPE __SWORD_TYPE __intptr_t;
 187
 188 /* Duplicate info from sys/socket.h.  */
 189 __STD_TYPE __U32_TYPE __socklen_t;
 190
 191
 192 #undef __STD_TYPE
 193
 194 #endif /* bits/types.h */