[4] | 1 | /* The <sys/types.h> header contains important data type definitions.
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| 2 | * It is considered good programming practice to use these definitions,
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| 3 | * instead of the underlying base type. By convention, all type names end
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| 4 | * with _t.
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| 5 | */
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| 6 |
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| 7 | #ifndef _TYPES_H
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| 8 | #define _TYPES_H
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| 9 |
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| 10 | #ifndef _ANSI_H
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| 11 | #include <ansi.h>
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| 12 | #endif
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| 13 |
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| 14 | /* The type size_t holds all results of the sizeof operator. At first glance,
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| 15 | * it seems obvious that it should be an unsigned int, but this is not always
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| 16 | * the case. For example, MINIX-ST (68000) has 32-bit pointers and 16-bit
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| 17 | * integers. When one asks for the size of a 70K struct or array, the result
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| 18 | * requires 17 bits to express, so size_t must be a long type. The type
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| 19 | * ssize_t is the signed version of size_t.
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| 20 | */
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| 21 | #ifndef _SIZE_T
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| 22 | #define _SIZE_T
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| 23 | typedef unsigned int size_t;
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| 24 | #endif
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| 25 |
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| 26 | #ifndef _SSIZE_T
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| 27 | #define _SSIZE_T
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| 28 | typedef int ssize_t;
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| 29 | #endif
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| 30 |
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| 31 | #ifndef _TIME_T
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| 32 | #define _TIME_T
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| 33 | typedef long time_t; /* time in sec since 1 Jan 1970 0000 GMT */
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| 34 | #endif
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| 35 |
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| 36 | #ifndef _CLOCK_T
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| 37 | #define _CLOCK_T
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| 38 | typedef long clock_t; /* unit for system accounting */
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| 39 | #endif
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| 40 |
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| 41 | #ifndef _SIGSET_T
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| 42 | #define _SIGSET_T
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| 43 | typedef unsigned long sigset_t;
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| 44 | #endif
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| 45 |
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| 46 | /* Open Group Base Specifications Issue 6 (not complete) */
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| 47 | typedef long useconds_t; /* Time in microseconds */
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| 48 |
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| 49 | /* Types used in disk, inode, etc. data structures. */
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| 50 | typedef short dev_t; /* holds (major|minor) device pair */
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| 51 | typedef char gid_t; /* group id */
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| 52 | typedef unsigned long ino_t; /* i-node number (V3 filesystem) */
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| 53 | typedef unsigned short mode_t; /* file type and permissions bits */
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| 54 | typedef short nlink_t; /* number of links to a file */
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| 55 | typedef unsigned long off_t; /* offset within a file */
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| 56 | typedef int pid_t; /* process id (must be signed) */
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| 57 | typedef short uid_t; /* user id */
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| 58 | typedef unsigned long zone_t; /* zone number */
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| 59 | typedef unsigned long block_t; /* block number */
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| 60 | typedef unsigned long bit_t; /* bit number in a bit map */
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| 61 | typedef unsigned short zone1_t; /* zone number for V1 file systems */
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| 62 | typedef unsigned short bitchunk_t; /* collection of bits in a bitmap */
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| 63 |
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| 64 | typedef unsigned char u8_t; /* 8 bit type */
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| 65 | typedef unsigned short u16_t; /* 16 bit type */
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| 66 | typedef unsigned long u32_t; /* 32 bit type */
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| 67 |
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| 68 | typedef char i8_t; /* 8 bit signed type */
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| 69 | typedef short i16_t; /* 16 bit signed type */
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| 70 | typedef long i32_t; /* 32 bit signed type */
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| 71 |
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| 72 | typedef struct { u32_t _[2]; } u64_t;
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| 73 |
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| 74 | /* The following types are needed because MINIX uses K&R style function
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| 75 | * definitions (for maximum portability). When a short, such as dev_t, is
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| 76 | * passed to a function with a K&R definition, the compiler automatically
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| 77 | * promotes it to an int. The prototype must contain an int as the parameter,
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| 78 | * not a short, because an int is what an old-style function definition
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| 79 | * expects. Thus using dev_t in a prototype would be incorrect. It would be
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| 80 | * sufficient to just use int instead of dev_t in the prototypes, but Dev_t
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| 81 | * is clearer.
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| 82 | */
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| 83 | typedef int Dev_t;
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| 84 | typedef int _mnx_Gid_t;
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| 85 | typedef int Nlink_t;
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| 86 | typedef int _mnx_Uid_t;
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| 87 | typedef int U8_t;
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| 88 | typedef unsigned long U32_t;
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| 89 | typedef int I8_t;
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| 90 | typedef int I16_t;
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| 91 | typedef long I32_t;
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| 92 |
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| 93 | /* ANSI C makes writing down the promotion of unsigned types very messy. When
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| 94 | * sizeof(short) == sizeof(int), there is no promotion, so the type stays
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| 95 | * unsigned. When the compiler is not ANSI, there is usually no loss of
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| 96 | * unsignedness, and there are usually no prototypes so the promoted type
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| 97 | * doesn't matter. The use of types like Ino_t is an attempt to use ints
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| 98 | * (which are not promoted) while providing information to the reader.
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| 99 | */
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| 100 |
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| 101 | typedef unsigned long Ino_t;
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| 102 |
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| 103 | #if _EM_WSIZE == 2
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| 104 | /*typedef unsigned int Ino_t; Ino_t is now 32 bits */
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| 105 | typedef unsigned int Zone1_t;
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| 106 | typedef unsigned int Bitchunk_t;
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| 107 | typedef unsigned int U16_t;
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| 108 | typedef unsigned int _mnx_Mode_t;
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| 109 |
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| 110 | #else /* _EM_WSIZE == 4, or _EM_WSIZE undefined */
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| 111 | /*typedef int Ino_t; Ino_t is now 32 bits */
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| 112 | typedef int Zone1_t;
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| 113 | typedef int Bitchunk_t;
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| 114 | typedef int U16_t;
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| 115 | typedef int _mnx_Mode_t;
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| 116 |
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| 117 | #endif /* _EM_WSIZE == 2, etc */
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| 118 |
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| 119 | /* Signal handler type, e.g. SIG_IGN */
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| 120 | typedef void _PROTOTYPE( (*sighandler_t), (int) );
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| 121 |
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| 122 | /* Compatibility with other systems */
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| 123 | typedef unsigned char u_char;
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| 124 | typedef unsigned short u_short;
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| 125 | typedef unsigned int u_int;
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| 126 | typedef unsigned long u_long;
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| 127 | typedef char *caddr_t;
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| 128 |
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| 129 | #endif /* _TYPES_H */
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