149 lines
4.4 KiB
C
149 lines
4.4 KiB
C
/* The <sys/types.h> header contains important data type definitions.
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* It is considered good programming practice to use these definitions,
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* instead of the underlying base type. By convention, all type names end
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* with _t.
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*/
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#ifndef _TYPES_H
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#define _TYPES_H
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#ifndef _MINIX_ANSI_H
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#include <minix/ansi.h>
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#endif
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typedef unsigned char u8_t; /* 8 bit type */
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typedef unsigned short u16_t; /* 16 bit type */
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typedef signed char i8_t; /* 8 bit signed type */
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typedef short i16_t; /* 16 bit signed type */
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#if __SIZEOF_LONG__ > 4
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/* compiling with gcc on some (e.g. x86-64) platforms */
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typedef unsigned int u32_t; /* 32 bit type */
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typedef int i32_t; /* 32 bit signed type */
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#else
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/* default for ACK or gcc on 32 bit platforms */
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typedef unsigned long u32_t; /* 32 bit type */
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typedef long i32_t; /* 32 bit signed type */
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#endif
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#if !defined(__LONG_LONG_SUPPORTED)
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typedef struct {
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u32_t lo;
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u32_t hi;
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} u64_t;
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#else
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#if __SIZEOF_LONG__ > 4
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typedef unsigned long u64_t;
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#else
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typedef unsigned long long u64_t;
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#endif
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#endif
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/* some Minix specific types that do not conflict with posix */
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typedef u32_t zone_t; /* zone number */
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typedef u32_t block_t; /* block number */
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typedef u32_t bit_t; /* bit number in a bit map */
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typedef u16_t zone1_t; /* zone number for V1 file systems */
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typedef u32_t bitchunk_t; /* collection of bits in a bitmap */
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/* ANSI C makes writing down the promotion of unsigned types very messy. When
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* sizeof(short) == sizeof(int), there is no promotion, so the type stays
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* unsigned. When the compiler is not ANSI, there is usually no loss of
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* unsignedness, and there are usually no prototypes so the promoted type
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* doesn't matter. The use of types like Ino_t is an attempt to use ints
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* (which are not promoted) while providing information to the reader.
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*/
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typedef unsigned long Ino_t;
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#if defined(_MINIX) || defined(__minix)
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/* The type size_t holds all results of the sizeof operator. At first glance,
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* it seems obvious that it should be an unsigned int, but this is not always
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* the case. For example, MINIX-ST (68000) has 32-bit pointers and 16-bit
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* integers. When one asks for the size of a 70K struct or array, the result
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* requires 17 bits to express, so size_t must be a long type. The type
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* ssize_t is the signed version of size_t.
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*/
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#ifndef _SIZE_T
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#define _SIZE_T
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typedef unsigned int size_t;
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#endif
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#ifndef _SSIZE_T
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#define _SSIZE_T
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typedef int ssize_t;
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#endif
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#ifndef _TIME_T
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#define _TIME_T
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typedef long time_t; /* time in sec since 1 Jan 1970 0000 GMT */
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#endif
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#ifndef _CLOCK_T
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#define _CLOCK_T
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typedef long clock_t; /* unit for system accounting */
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#endif
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#ifndef _SIGSET_T
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#define _SIGSET_T
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typedef unsigned long sigset_t;
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#endif
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#ifndef _KEY_T
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#define _KEY_T
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typedef long key_t;
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#endif
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/* Open Group Base Specifications Issue 6 (not complete) */
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typedef long useconds_t; /* Time in microseconds */
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typedef short dev_t; /* holds (major|minor) device pair */
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/* Types used in disk, inode, etc. data structures. */
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typedef char gid_t; /* group id */
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typedef unsigned long ino_t; /* i-node number (V3 filesystem) */
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typedef unsigned short mode_t; /* file type and permissions bits */
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typedef short nlink_t; /* number of links to a file */
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typedef long off_t; /* offset within a file */
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typedef int pid_t; /* process id (must be signed) */
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typedef short uid_t; /* user id */
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typedef unsigned long fsblkcnt_t; /* File system block count */
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typedef unsigned long fsfilcnt_t; /* File system file count */
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/* Signal handler type, e.g. SIG_IGN */
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typedef void _PROTOTYPE( (*sighandler_t), (int) );
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typedef sighandler_t sig_t;
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/* Compatibility with other systems */
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typedef unsigned char u_char;
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typedef unsigned short u_short;
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typedef unsigned int u_int;
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typedef unsigned long u_long;
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typedef char *caddr_t;
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/* Devices. */
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#define MAJOR 8 /* major device = (dev>>MAJOR) & 0377 */
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#define MINOR 0 /* minor device = (dev>>MINOR) & 0377 */
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#ifndef minor
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#define minor(dev) (((dev) >> MINOR) & 0xff)
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#endif
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#ifndef major
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#define major(dev) (((dev) >> MAJOR) & 0xff)
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#endif
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#ifndef makedev
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#define makedev(major, minor) \
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((dev_t) (((major) << MAJOR) | ((minor) << MINOR)))
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#endif
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#endif /* _MINIX || __minix */
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#if defined(_MINIX)
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typedef unsigned int uint; /* Sys V compatibility */
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#endif
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#endif /* _TYPES_H */
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