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      1 /* $OpenBSD: limits.h,v 1.6 2005/12/13 00:35:23 millert Exp $ */
      2 /*
      3  * Copyright (c) 2002 Marc Espie.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
     15  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     16  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     17  * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OPENBSD
     18  * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     19  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     20  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 #ifndef _SYS_LIMITS_H_
     27 #define _SYS_LIMITS_H_
     28 
     29 #include <sys/cdefs.h>
     30 #include <linux/limits.h>
     31 
     32 /* Common definitions for limits.h. */
     33 
     34 /*
     35  * <machine/internal_types.h> is meant to describe a specific architecture,
     36  * but to be a safe include, that doesn't ever define anything that is
     37  * user-visible (only typedefs and #define names that stays in the __xxx
     38  * namespace).
     39  *
     40  *   __machine_has_unsigned_chars	(default is signed chars)
     41  *   __FLT_xxx/__DBL_xxx		non standard values for floating
     42  *   					points limits.
     43  */
     44 #include <machine/internal_types.h>
     45 
     46 /* Legacy */
     47 #include <machine/limits.h>
     48 
     49 #define	CHAR_BIT	8		/* number of bits in a char */
     50 
     51 #define	SCHAR_MAX	0x7f		/* max value for a signed char */
     52 #define SCHAR_MIN	(-0x7f-1)	/* min value for a signed char */
     53 
     54 #define	UCHAR_MAX	0xffU		/* max value for an unsigned char */
     55 #ifdef __machine_has_unsigned_chars
     56 # define CHAR_MIN	0		/* min value for a char */
     57 # define CHAR_MAX	0xff		/* max value for a char */
     58 #else
     59 # define CHAR_MAX	0x7f
     60 # define CHAR_MIN	(-0x7f-1)
     61 #endif
     62 
     63 #define	USHRT_MAX	0xffffU		/* max value for an unsigned short */
     64 #define	SHRT_MAX	0x7fff		/* max value for a short */
     65 #define SHRT_MIN        (-0x7fff-1)     /* min value for a short */
     66 
     67 #define	UINT_MAX	0xffffffffU	/* max value for an unsigned int */
     68 #define	INT_MAX		0x7fffffff	/* max value for an int */
     69 #define	INT_MIN		(-0x7fffffff-1)	/* min value for an int */
     70 
     71 #ifdef __LP64__
     72 # define ULONG_MAX	0xffffffffffffffffUL
     73 					/* max value for unsigned long */
     74 # define LONG_MAX	0x7fffffffffffffffL
     75 					/* max value for a signed long */
     76 # define LONG_MIN	(-0x7fffffffffffffffL-1)
     77 					/* min value for a signed long */
     78 #else
     79 # define ULONG_MAX	0xffffffffUL	/* max value for an unsigned long */
     80 # define LONG_MAX	0x7fffffffL	/* max value for a long */
     81 # define LONG_MIN	(-0x7fffffffL-1)/* min value for a long */
     82 #endif
     83 
     84 #if __BSD_VISIBLE || __ISO_C_VISIBLE >= 1999
     85 # define ULLONG_MAX	0xffffffffffffffffULL
     86 					/* max value for unsigned long long */
     87 # define LLONG_MAX	0x7fffffffffffffffLL
     88 					/* max value for a signed long long */
     89 # define LLONG_MIN	(-0x7fffffffffffffffLL-1)
     90 					/* min value for a signed long long */
     91 #endif
     92 
     93 #if __BSD_VISIBLE
     94 # define UID_MAX	UINT_MAX	/* max value for a uid_t */
     95 # define GID_MAX	UINT_MAX	/* max value for a gid_t */
     96 #endif
     97 
     98 
     99 #ifdef __LP64__
    100 # define LONG_BIT	64
    101 #else
    102 # define LONG_BIT	32
    103 #endif
    104 
    105 /* float.h defines these as well */
    106 # if !defined(DBL_DIG)
    107 #  if defined(__DBL_DIG)
    108 #   define DBL_DIG	__DBL_DIG
    109 #   define DBL_MAX	__DBL_MAX
    110 #   define DBL_MIN	__DBL_MIN
    111 
    112 #   define FLT_DIG	__FLT_DIG
    113 #   define FLT_MAX	__FLT_MAX
    114 #   define FLT_MIN	__FLT_MIN
    115 #  else
    116 #   define DBL_DIG	15
    117 #   define DBL_MAX	1.7976931348623157E+308
    118 #   define DBL_MIN	2.2250738585072014E-308
    119 
    120 #   define FLT_DIG	6
    121 #   define FLT_MAX	3.40282347E+38F
    122 #   define FLT_MIN	1.17549435E-38F
    123 #  endif
    124 # endif
    125 
    126 /* Bionic: the following has been optimized out from our processed kernel headers */
    127 
    128 #define  CHILD_MAX   999
    129 #define  OPEN_MAX    256
    130 
    131 /* Bionic-specific definitions */
    132 
    133 #define  _POSIX_VERSION             200112L   /* Posix C language bindings version */
    134 #define  _POSIX2_VERSION            -1        /* we don't support Posix command-line tools */
    135 #define  _POSIX2_C_VERSION          _POSIX_VERSION
    136 #define  _XOPEN_VERSION             500       /* by Posix definition */
    137 #define  _XOPEN_XCU_VERSION         -1        /* we don't support command-line utilities */
    138 
    139 /* tell what we implement legacy stuff when appropriate */
    140 #if _POSIX_VERSION > 0
    141 #define  _XOPEN_XPG2                1
    142 #define  _XOPEN_XPG3                1
    143 #define  _XOPEN_XPG4                1
    144 #define  _XOPEN_UNIX                1
    145 #endif
    146 
    147 #define  _XOPEN_ENH_I18N          -1  /* we don't support internationalization in the C library */
    148 #define  _XOPEN_CRYPT             -1  /* don't support X/Open Encryption */
    149 #define  _XOPEN_LEGACY            -1  /* don't claim we support these, we have some of them but not all */
    150 #define  _XOPEN_REALTIME          -1 /* we don't support all these functions */
    151 #define  _XOPEN_REALTIME_THREADS  -1  /* same here */
    152 
    153 #define  _POSIX_REALTIME_SIGNALS    -1  /* for now, this is not supported */
    154 #define  _POSIX_PRIORITY_SCHEDULING  1  /* priority scheduling is a Linux feature */
    155 #define  _POSIX_TIMERS               1  /* Posix timers are supported */
    156 #undef   _POSIX_ASYNCHRONOUS_IO         /* aio_ functions are not supported */
    157 #define  _POSIX_SYNCHRONIZED_IO      1  /* synchronized i/o supported */
    158 #define  _POSIX_FSYNC                1  /* fdatasync() supported */
    159 #define  _POSIX_MAPPED_FILES         1  /* mmap-ed files supported */
    160 
    161 /* XXX: TODO: complete and check list here */
    162 
    163 
    164 #define  _POSIX_THREADS             1    /* we support threads */
    165 #define  _POSIX_THREAD_STACKADDR    1    /* we support thread stack address */
    166 #define  _POSIX_THREAD_STACKSIZE    1    /* we support thread stack size */
    167 #define  _POSIX_THREAD_PRIO_INHERIT 200112L   /* linux feature */
    168 #define  _POSIX_THREAD_PRIO_PROTECT 200112L   /* linux feature */
    169 
    170 #undef   _POSIX_PROCESS_SHARED           /* we don't support process-shared synchronization */
    171 #undef   _POSIX_THREAD_SAFE_FUNCTIONS    /* most functions are, but not everything yet */
    172 #define  _POSIX_CHOWN_RESTRICTED    1    /* yes, chown requires appropriate priviledges */
    173 #define  _POSIX_NO_TRUNC            1    /* very long pathnames generate an error */
    174 #define  _POSIX_SAVED_IDS           1    /* saved user ids is a Linux feature */
    175 #define  _POSIX_JOB_CONTROL         1    /* job control is a Linux feature */
    176 
    177 
    178 
    179 #endif
    180