imax(9) [netbsd man page]

IMAX(9) 						   BSD Kernel Developer's Manual						   IMAX(9)

NAME

     imax, imin, lmax, lmin, max, min, ulmax, ulmin -- compare integers

SYNOPSIS

     int
     imax(int a, int b);

     int
     imin(int a, int b);

     long
     lmax(long a, long b);

     long
     lmin(long a, long b);

     u_int
     max(u_int a, u_int b);

     u_int
     min(u_int a, u_int b);

     u_long
     ulmax(u_long a, u_long b);

     u_long
     ulmin(u_long a, u_long b);

DESCRIPTION

     The imin(), lmin(), min(), and ulmin() functions return whichever argument is algebraically smaller, differing only in their argument and
     return types: these functions operate on, respectively, natural size, long, unsigned and unsigned long integers.

     The imax(), lmax(), max(), and ulmax() functions are identical except that they return the algebraically larger argument between a and b.

SEE ALSO

     ilog2(3)

BSD
								   June 8, 2010 							       BSD

TYPES(5)						      BSD File Formats Manual							  TYPES(5)

NAME

     types -- system data types

SYNOPSIS

     #include <sys/types.h>

DESCRIPTION

     The file sys/types.h contains the defined data types used in the kernel (most are used through out the system).

     #ifndef _TYPES_H_
     #define _TYPES_H_

     typedef short   dev_t;
     #ifndef _POSIX_SOURCE
					     /* major part of a device */
     #define major(x)	     ((int)(((unsigned)(x)>>8)&0377))
					     /* minor part of a device */
     #define minor(x)	     ((int)((x)&0377))
					     /* make a device number */
     #define makedev(x,y)    ((dev_t)(((x)<<8) | (y)))
     #endif

     typedef unsigned char   u_char;
     typedef unsigned short  u_short;
     typedef unsigned int    u_int;
     typedef unsigned long   u_long;
     typedef unsigned short  ushort;	     /* Sys V compatibility */

     #if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE)
     #include <machine/types.h>
     #endif

     #ifdef  _CLOCK_T_
     typedef _CLOCK_T_	     clock_t;
     #undef  _CLOCK_T_
     #endif

     #ifdef  _SIZE_T_
     typedef _SIZE_T_	     size_t;
     #undef  _SIZE_T_
     #endif

     #ifdef  _TIME_T_
     typedef _TIME_T_	     time_t;
     #undef  _TIME_T_
     #endif

     typedef u_int64_t	     u_quad_t;
     typedef int64_t	     quad_t
     typedef quad_t *	     qaddr_t;	     /* should be typedef quad * qaddr_t; */

     typedef long    daddr_t;
     typedef char *  caddr_t;
     #ifdef _DARWIN_FEATURE_64_BIT_INODE
     typedef u_int64_t	     ino_t;
     #else /* !_DARWIN_FEATURE_64_BIT_INODE */
     typedef u_int	     ino_t;
     #endif /* _DARWIN_FEATURE_64_BIT_INODE */
     typedef long    swblk_t;
     typedef long    segsz_t;
     typedef int64_t off_t;
     typedef u_int   uid_t;
     typedef u_int   gid_t;
     typedef int     pid_t;
     typedef u_short nlink_t;
     typedef u_short mode_t;
     typedef u_long  fixpt_t;

     #ifndef _POSIX_SOURCE
     #define NBBY    8		     /* number of bits in a byte */

     /*
      * Select uses bit masks of file descriptors in longs.  These macros
      * manipulate such bit fields (the filesystem macros use chars).
      * FD_SETSIZE may be defined by the user, but the default here should
      * be >= NOFILE (param.h).
      */
     #ifndef FD_SETSIZE
     #define FD_SETSIZE      1024
     #endif

     typedef long    fd_mask;
     #define NFDBITS (sizeof(fd_mask) * NBBY)	     /* bits per mask */

     #ifndef howmany
     #define howmany(x, y)   (((x)+((y)-1))/(y))
     #endif

     typedef struct fd_set {
	     fd_mask fds_bits[howmany(FD_SETSIZE, NFDBITS)];
     } fd_set;

     #define FD_SET(n, p)    ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
     #define FD_CLR(n, p)    ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
     #define FD_ISSET(n, p)  ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
     #define FD_COPY(f, t)   bcopy(f, t, sizeof(*(f)))
     #define FD_ZERO(p)      bzero((char *)(p), sizeof(*(p)))

     #endif /* !_POSIX_SOURCE */
     #endif /* !_TYPES_H_ */

SEE ALSO

     adb(1), lseek(2), time(3), fs(5)

HISTORY

     A types file appeared in Version 7 AT&T UNIX.

Darwin								   May 15, 2008 							    Darwin