bits/types.h

   1 /* bits/types.h -- definitions of __*_t types underlying *_t types.
   2    Copyright (C) 2002, 2003 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 #define __need_size_t
  31 #include <stddef.h>
  32
  33 /* Convenience types.  */
  34 typedef unsigned char __u_char;
  35 typedef unsigned short int __u_short;
  36 typedef unsigned int __u_int;
  37 typedef unsigned long int __u_long;
  38
  39 /* Fixed-size types, underlying types depend on word size and compiler.  */
  40 typedef signed char __int8_t;
  41 typedef unsigned char __uint8_t;
  42 typedef signed short int __int16_t;
  43 typedef unsigned short int __uint16_t;
  44 typedef signed int __int32_t;
  45 typedef unsigned int __uint32_t;
  46 #if __WORDSIZE == 64
  47 typedef signed long int __int64_t;
  48 typedef unsigned long int __uint64_t;
  49 #elif defined __GLIBC_HAVE_LONG_LONG
  50 __extension__ typedef signed long long int __int64_t;
  51 __extension__ typedef unsigned long long int __uint64_t;
  52 #endif
  53
  54 /* quad_t is also 64 bits, but is traditionally defined as `long long'
  55    even when `long' is also 64 bits.  */
  56 #ifdef __GLIBC_HAVE_LONG_LONG
  57 __extension__ typedef long long int __quad_t;
  58 __extension__ typedef unsigned long long int __u_quad_t;
  59 #elif __WORDSIZE == 64
  60 typedef long int __quad_t;
  61 typedef unsigned long int __u_quad_t;
  62 #else
  63 typedef struct
  64 {
  65   long __val[2];
  66 } __quad_t;
  67 typedef struct
  68 {
  69   __u_long __val[2];
  70 } __u_quad_t;
  71 #endif
  72
  73
  74 /* The machine-dependent file <bits/typesizes.h> defines __*_T_TYPE
  75    macros for each of the OS types we define below.  The definitions
  76    of those macros must use the following macros for underlying types.
  77    We define __S<SIZE>_TYPE and __U<SIZE>_TYPE for the signed and unsigned
  78    variants of each of the following integer types on this machine.
  79
  80         16              -- "natural" 16-bit type (always short)
  81         32              -- "natural" 32-bit type (always int)
  82         64              -- "natural" 64-bit type (long or long long)
  83         LONG32          -- 32-bit type, traditionally long
  84         QUAD            -- 64-bit type, always long long
  85         WORD            -- natural type of __WORDSIZE bits (int or long)
  86         LONGWORD        -- type of __WORDSIZE bits, traditionally long
  87
  88    We distinguish WORD/LONGWORD, 32/LONG32, and 64/QUAD so that the
  89    conventional uses of `long' or `long long' type modifiers match the
  90    types we define, even when a less-adorned type would be the same size.
  91    This matters for (somewhat) portably writing printf/scanf formats for
  92    these types, where using the appropriate l or ll format modifiers can
  93    make the typedefs and the formats match up across all GNU platforms.  If
  94    we used `long' when it's 64 bits where `long long' is expected, then the
  95    compiler would warn about the formats not matching the argument types,
  96    and the programmer changing them to shut up the compiler would break the
  97    program's portability.
  98
  99    Here we assume what is presently the case in all the GCC configurations
 100    we support: long long is always 64 bits, long is always word/address size,
 101    and int is always 32 bits.  */
 102
 103 #define __S16_TYPE              short int
 104 #define __U16_TYPE              unsigned short int
 105 #define __S32_TYPE              int
 106 #define __U32_TYPE              unsigned int
 107 #define __SLONGWORD_TYPE        long int
 108 #define __ULONGWORD_TYPE        unsigned long int
 109 #define __SQUAD_TYPE            long long int
 110 #define __UQUAD_TYPE            unsigned long long int
 111 #if __WORDSIZE == 32
 112 # define __SWORD_TYPE           int
 113 # define __UWORD_TYPE           unsigned int
 114 # define __SLONG32_TYPE         long int
 115 # define __ULONG32_TYPE         unsigned long int
 116 # define __S64_TYPE             __quad_t
 117 # define __U64_TYPE             __u_quad_t
 118 #elif __WORDSIZE == 64
 119 # define __SWORD_TYPE           long int
 120 # define __UWORD_TYPE           unsigned long int
 121 # define __SLONG32_TYPE         int
 122 # define __ULONG32_TYPE         unsigned int
 123 # define __S64_TYPE             long int
 124 # define __U64_TYPE             unsigned long int
 125 #else
 126 # error
 127 #endif
 128 #include <bits/typesizes.h>     /* Defines __*_T_TYPE macros.  */
 129
 130 /* We want __extension__ before typedef's that use nonstandard base types
 131    such as `long long' in C89 mode.  */
 132 #define __STD_TYPE __extension__ typedef
 133
 134
 135 __STD_TYPE __DEV_T_TYPE __dev_t;        /* Type of device numbers.  */
 136 __STD_TYPE __UID_T_TYPE __uid_t;        /* Type of user identifications.  */
 137 __STD_TYPE __GID_T_TYPE __gid_t;        /* Type of group identifications.  */
 138 __STD_TYPE __INO_T_TYPE __ino_t;        /* Type of file serial numbers.  */
 139 __STD_TYPE __INO64_T_TYPE __ino64_t;    /* Type of file serial numbers (LFS).*/
 140 __STD_TYPE __MODE_T_TYPE __mode_t;      /* Type of file attribute bitmasks.  */
 141 __STD_TYPE __NLINK_T_TYPE __nlink_t;    /* Type of file link counts.  */
 142 __STD_TYPE __OFF_T_TYPE __off_t;        /* Type of file sizes and offsets.  */
 143 __STD_TYPE __OFF64_T_TYPE __off64_t;    /* Type of file sizes and offsets (LFS).  */
 144 __STD_TYPE __PID_T_TYPE __pid_t;        /* Type of process identifications.  */
 145 __STD_TYPE __FSID_T_TYPE __fsid_t;      /* Type of file system IDs.  */
 146 __STD_TYPE __CLOCK_T_TYPE __clock_t;    /* Type of CPU usage counts.  */
 147 __STD_TYPE __RLIM_T_TYPE __rlim_t;      /* Type for resource measurement.  */
 148 __STD_TYPE __RLIM64_T_TYPE __rlim64_t;  /* Type for resource measurement (LFS).  */
 149 __STD_TYPE __ID_T_TYPE __id_t;          /* General type for IDs.  */
 150 __STD_TYPE __TIME_T_TYPE __time_t;      /* Seconds since the Epoch.  */
 151 __STD_TYPE __USECONDS_T_TYPE __useconds_t; /* Count of microseconds.  */
 152 __STD_TYPE __SUSECONDS_T_TYPE __suseconds_t; /* Signed count of microseconds.  */
 153
 154 __STD_TYPE __DADDR_T_TYPE __daddr_t;    /* The type of a disk address.  */
 155 __STD_TYPE __SWBLK_T_TYPE __swblk_t;    /* Type of a swap block maybe?  */
 156 __STD_TYPE __KEY_T_TYPE __key_t;        /* Type of an IPC key.  */
 157
 158 /* Clock ID used in clock and timer functions.  */
 159 __STD_TYPE __CLOCKID_T_TYPE __clockid_t;
 160
 161 /* Timer ID returned by `timer_create'.  */
 162 __STD_TYPE __TIMER_T_TYPE __timer_t;
 163
 164 /* Type to represent block size.  */
 165 __STD_TYPE __BLKSIZE_T_TYPE __blksize_t;
 166
 167 /* Types from the Large File Support interface.  */
 168
 169 /* Type to count number of disk blocks.  */
 170 __STD_TYPE __BLKCNT_T_TYPE __blkcnt_t;
 171 __STD_TYPE __BLKCNT64_T_TYPE __blkcnt64_t;
 172
 173 /* Type to count file system blocks.  */
 174 __STD_TYPE __FSBLKCNT_T_TYPE __fsblkcnt_t;
 175 __STD_TYPE __FSBLKCNT64_T_TYPE __fsblkcnt64_t;
 176
 177 /* Type to count file system nodes.  */
 178 __STD_TYPE __FSFILCNT_T_TYPE __fsfilcnt_t;
 179 __STD_TYPE __FSFILCNT64_T_TYPE __fsfilcnt64_t;
 180
 181 __STD_TYPE __SSIZE_T_TYPE __ssize_t; /* Type of a byte count, or error.  */
 182
 183 /* These few don't really vary by system, they always correspond
 184    to one of the other defined types.  */
 185 typedef __off64_t __loff_t;     /* Type of file sizes and offsets (LFS).  */
 186 typedef __quad_t *__qaddr_t;
 187 typedef char *__caddr_t;
 188
 189 /* Duplicates info from stdint.h but this is used in unistd.h.  */
 190 __STD_TYPE __SWORD_TYPE __intptr_t;
 191
 192 /* Duplicate info from sys/socket.h.  */
 193 __STD_TYPE __U32_TYPE __socklen_t;
 194
 195
 196 #undef __STD_TYPE
 197
 198 #endif /* bits/types.h */