glibc/sysdeps/generic/gnu/types.h

/* Copyright (C) 1991, 92, 94, 95, 96 Free Software Foundation, Inc.
This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#ifndef	_GNU_TYPES_H

#define	_GNU_TYPES_H	1


/* Convenience types.  */
typedef unsigned char __u_char;
typedef unsigned short __u_short;
typedef unsigned int __u_int;
typedef unsigned long __u_long;
#ifdef __GNUC__
typedef unsigned long long int __u_quad_t;
typedef long long int __quad_t;
typedef __quad_t *__qaddr_t;
#else
typedef struct
{
  long val[2];
} __quad_t;
typedef struct
{
  __u_long val[2];
} __u_quad_t;
#endif
typedef int __dev_t;		/* Type of device numbers.  */
typedef unsigned int __uid_t;	/* Type of user identifications.  */
typedef unsigned int __gid_t;	/* Type of group identifications.  */
typedef unsigned int __ino_t;	/* Type of file serial numbers.  */
typedef unsigned int __mode_t;	/* Type of file attribute bitmasks.  */
typedef unsigned short int __nlink_t; /* Type of file link counts.  */
typedef long int __off_t;	/* Type of file sizes and offsets.  */
typedef int __pid_t;		/* Type of process identifications.  */
typedef int __ssize_t;		/* Type of a byte count, or error.  */
typedef __u_quad_t __fsid_t;	/* Type of file system IDs.  */
typedef long int __clock_t;	/* Type of CPU usage counts.  */

/* Everythin' else.  */
typedef long int __daddr_t;	/* The type of a disk address.  */
typedef char *__caddr_t;
typedef long int __time_t;
typedef long int __swblk_t;	/* Type of a swap block maybe?  */

/* fd_set for select.  */

/* Number of descriptors that can fit in an `fd_set'.  */
#define	__FD_SETSIZE	256

/* It's easier to assume 8-bit bytes than to get CHAR_BIT.  */
#define	__NFDBITS	(sizeof (unsigned long int) * 8)
#define	__FDELT(d)	((d) / __NFDBITS)
#define	__FDMASK(d)	(1 << ((d) % __NFDBITS))

typedef struct
  {
    /* Some braindead old software uses this member name.  */
    unsigned long int fds_bits[(__FD_SETSIZE + (__NFDBITS - 1)) / __NFDBITS];
  } __fd_set;

typedef unsigned long __fd_mask;

/* This line MUST be split!  Otherwise m4 will not change it.  */
#define	__FD_ZERO(set)	\
  ((void) memset ((__ptr_t) (set), 0, sizeof (fd_set)))
#define	__FD_SET(d, set)	((set)->fds_bits[__FDELT(d)] |= __FDMASK(d))
#define	__FD_CLR(d, set)	((set)->fds_bits[__FDELT(d)] &= ~__FDMASK(d))
#define	__FD_ISSET(d, set)	((set)->fds_bits[__FDELT(d)] & __FDMASK(d))


#endif /* gnu/types.h */