bits/types.h

   1 /* bits/types.h -- definitions of __*_t types underlying *_t types.
   2    Copyright (C) 2002, 2003, 2004, 2005, 2007 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 /*
  21  * Never include this file directly; use <sys/types.h> instead.
  22  */
  23
  24 #ifndef _BITS_TYPES_H
  25 #define _BITS_TYPES_H   1
  26
  27 #include <features.h>
  28 #include <bits/wordsize.h>
  29
  30 /* Convenience types.  */
  31 typedef unsigned char __u_char;
  32 typedef unsigned short int __u_short;
  33 typedef unsigned int __u_int;
  34 typedef unsigned long int __u_long;
  35
  36 /* Fixed-size types, underlying types depend on word size and compiler.  */
  37 typedef signed char __int8_t;
  38 typedef unsigned char __uint8_t;
  39 typedef signed short int __int16_t;
  40 typedef unsigned short int __uint16_t;
  41 typedef signed int __int32_t;
  42 typedef unsigned int __uint32_t;
  43 #if __WORDSIZE == 64
  44 typedef signed long int __int64_t;
  45 typedef unsigned long int __uint64_t;
  46 #elif defined __GLIBC_HAVE_LONG_LONG
  47 __extension__ typedef signed long long int __int64_t;
  48 __extension__ typedef unsigned long long int __uint64_t;
  49 #endif
  50
  51 /* quad_t is also 64 bits.  */
  52 #if __WORDSIZE == 64
  53 typedef long int __quad_t;
  54 typedef unsigned long int __u_quad_t;
  55 #elif defined __GLIBC_HAVE_LONG_LONG
  56 __extension__ typedef long long int __quad_t;
  57 __extension__ typedef unsigned long long int __u_quad_t;
  58 #else
  59 typedef struct
  60 {
  61   long __val[2];
  62 } __quad_t;
  63 typedef struct
  64 {
  65   __u_long __val[2];
  66 } __u_quad_t;
  67 #endif
  68
  69
  70 /* The machine-dependent file <bits/typesizes.h> defines __*_T_TYPE
  71    macros for each of the OS types we define below.  The definitions
  72    of those macros must use the following macros for underlying types.
  73    We define __S<SIZE>_TYPE and __U<SIZE>_TYPE for the signed and unsigned
  74    variants of each of the following integer types on this machine.
  75
  76         16              -- "natural" 16-bit type (always short)
  77         32              -- "natural" 32-bit type (always int)
  78         64              -- "natural" 64-bit type (long or long long)
  79         LONG32          -- 32-bit type, traditionally long
  80         QUAD            -- 64-bit type, always long long
  81         WORD            -- natural type of __WORDSIZE bits (int or long)
  82         LONGWORD        -- type of __WORDSIZE bits, traditionally long
  83
  84    We distinguish WORD/LONGWORD, 32/LONG32, and 64/QUAD so that the
  85    conventional uses of `long' or `long long' type modifiers match the
  86    types we define, even when a less-adorned type would be the same size.
  87    This matters for (somewhat) portably writing printf/scanf formats for
  88    these types, where using the appropriate l or ll format modifiers can
  89    make the typedefs and the formats match up across all GNU platforms.  If
  90    we used `long' when it's 64 bits where `long long' is expected, then the
  91    compiler would warn about the formats not matching the argument types,
  92    and the programmer changing them to shut up the compiler would break the
  93    program's portability.
  94
  95    Here we assume what is presently the case in all the GCC configurations
  96    we support: long long is always 64 bits, long is always word/address size,
  97    and int is always 32 bits.  */
  98
  99 #define __S16_TYPE              short int
 100 #define __U16_TYPE              unsigned short int
 101 #define __S32_TYPE              int
 102 #define __U32_TYPE              unsigned int
 103 #define __SLONGWORD_TYPE        long int
 104 #define __ULONGWORD_TYPE        unsigned long int
 105 #if __WORDSIZE == 32
 106 # define __SQUAD_TYPE           __quad_t
 107 # define __UQUAD_TYPE           __u_quad_t
 108 # define __SWORD_TYPE           int
 109 # define __UWORD_TYPE           unsigned int
 110 # define __SLONG32_TYPE         long int
 111 # define __ULONG32_TYPE         unsigned long int
 112 # define __S64_TYPE             __quad_t
 113 # define __U64_TYPE             __u_quad_t
 114 /* We want __extension__ before typedef's that use nonstandard base types
 115    such as `long long' in C89 mode.  */
 116 # define __STD_TYPE             __extension__ typedef
 117 #elif __WORDSIZE == 64
 118 # define __SQUAD_TYPE           long int
 119 # define __UQUAD_TYPE           unsigned long int
 120 # define __SWORD_TYPE           long int
 121 # define __UWORD_TYPE           unsigned long int
 122 # define __SLONG32_TYPE         int
 123 # define __ULONG32_TYPE         unsigned int
 124 # define __S64_TYPE             long int
 125 # define __U64_TYPE             unsigned long int
 126 /* No need to mark the typedef with __extension__.   */
 127 # define __STD_TYPE             typedef
 128 #else
 129 # error
 130 #endif
 131 #include <bits/typesizes.h>     /* Defines __*_T_TYPE macros.  */
 132
 133
 134 __STD_TYPE __DEV_T_TYPE __dev_t;        /* Type of device numbers.  */
 135 __STD_TYPE __UID_T_TYPE __uid_t;        /* Type of user identifications.  */
 136 __STD_TYPE __GID_T_TYPE __gid_t;        /* Type of group identifications.  */
 137 __STD_TYPE __INO_T_TYPE __ino_t;        /* Type of file serial numbers.  */
 138 __STD_TYPE __INO64_T_TYPE __ino64_t;    /* Type of file serial numbers (LFS).*/
 139 __STD_TYPE __MODE_T_TYPE __mode_t;      /* Type of file attribute bitmasks.  */
 140 __STD_TYPE __NLINK_T_TYPE __nlink_t;    /* Type of file link counts.  */
 141 __STD_TYPE __OFF_T_TYPE __off_t;        /* Type of file sizes and offsets.  */
 142 __STD_TYPE __OFF64_T_TYPE __off64_t;    /* Type of file sizes and offsets (LFS).  */
 143 __STD_TYPE __PID_T_TYPE __pid_t;        /* Type of process identifications.  */
 144 __STD_TYPE __FSID_T_TYPE __fsid_t;      /* Type of file system IDs.  */
 145 __STD_TYPE __CLOCK_T_TYPE __clock_t;    /* Type of CPU usage counts.  */
 146 __STD_TYPE __RLIM_T_TYPE __rlim_t;      /* Type for resource measurement.  */
 147 __STD_TYPE __RLIM64_T_TYPE __rlim64_t;  /* Type for resource measurement (LFS).  */
 148 __STD_TYPE __ID_T_TYPE __id_t;          /* General type for IDs.  */
 149 __STD_TYPE __TIME_T_TYPE __time_t;      /* Seconds since the Epoch.  */
 150 __STD_TYPE __USECONDS_T_TYPE __useconds_t; /* Count of microseconds.  */
 151 __STD_TYPE __SUSECONDS_T_TYPE __suseconds_t; /* Signed count of microseconds.  */
 152
 153 __STD_TYPE __DADDR_T_TYPE __daddr_t;    /* The type of a disk address.  */
 154 __STD_TYPE __SWBLK_T_TYPE __swblk_t;    /* Type of a swap block maybe?  */
 155 __STD_TYPE __KEY_T_TYPE __key_t;        /* Type of an IPC key.  */
 156
 157 /* Clock ID used in clock and timer functions.  */
 158 __STD_TYPE __CLOCKID_T_TYPE __clockid_t;
 159
 160 /* Timer ID returned by `timer_create'.  */
 161 __STD_TYPE __TIMER_T_TYPE __timer_t;
 162
 163 /* Type to represent block size.  */
 164 __STD_TYPE __BLKSIZE_T_TYPE __blksize_t;
 165
 166 /* Types from the Large File Support interface.  */
 167
 168 /* Type to count number of disk blocks.  */
 169 __STD_TYPE __BLKCNT_T_TYPE __blkcnt_t;
 170 __STD_TYPE __BLKCNT64_T_TYPE __blkcnt64_t;
 171
 172 /* Type to count file system blocks.  */
 173 __STD_TYPE __FSBLKCNT_T_TYPE __fsblkcnt_t;
 174 __STD_TYPE __FSBLKCNT64_T_TYPE __fsblkcnt64_t;
 175
 176 /* Type to count file system nodes.  */
 177 __STD_TYPE __FSFILCNT_T_TYPE __fsfilcnt_t;
 178 __STD_TYPE __FSFILCNT64_T_TYPE __fsfilcnt64_t;
 179
 180 __STD_TYPE __SSIZE_T_TYPE __ssize_t; /* Type of a byte count, or error.  */
 181
 182 /* These few don't really vary by system, they always correspond
 183    to one of the other defined types.  */
 184 typedef __off64_t __loff_t;     /* Type of file sizes and offsets (LFS).  */
 185 typedef __quad_t *__qaddr_t;
 186 typedef char *__caddr_t;
 187
 188 /* Duplicates info from stdint.h but this is used in unistd.h.  */
 189 __STD_TYPE __SWORD_TYPE __intptr_t;
 190
 191 /* Duplicate info from sys/socket.h.  */
 192 __STD_TYPE __U32_TYPE __socklen_t;
 193
 194
 195 #undef __STD_TYPE
 196
 197 #endif /* bits/types.h */