2.11BSD#431 - /usr/src/sys/pdp/limits.h

   1: /*
   2:  * Copyright (c) 1988, 1993
   3:  *	The Regents of the University of California.  All rights reserved.
   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:  * 3. All advertising materials mentioning features or use of this software
  14:  *    must display the following acknowledgement:
  15:  *	This product includes software developed by the University of
  16:  *	California, Berkeley and its contributors.
  17:  * 4. Neither the name of the University nor the names of its contributors
  18:  *    may be used to endorse or promote products derived from this software
  19:  *    without specific prior written permission.
  20:  *
  21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31:  * SUCH DAMAGE.
  32:  *
  33:  *	@(#)limits.h	8.3.1 (2.11BSD) 1996/1/11
  34:  */
  35: 
  36: #define CHAR_BIT    8       /* number of bits in a char */
  37: 
  38: 
  39: #define CLK_TCK     60      /* ticks per second */
  40: 
  41: /*
  42:  * According to ANSI (section 2.2.4.2), the values below must be usable by
  43:  * #if preprocessing directives.  Additionally, the expression must have the
  44:  * same type as would an expression that is an object of the corresponding
  45:  * type converted according to the integral promotions.  The subtraction for
  46:  * INT_MIN and LONG_MIN is so the value is not unsigned; 2147483648 is an
  47:  * unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2).
  48:  * These numbers work for pcc as well.  The UINT_MAX and ULONG_MAX values
  49:  * are written as hex so that GCC will be quiet about large integer constants.
  50:  */
  51: #define SCHAR_MAX   127     /* min value for a signed char */
  52: #define SCHAR_MIN   (-128)      /* max value for a signed char */
  53: 
  54: #define UCHAR_MAX   255     /* max value for an unsigned char */
  55: #define CHAR_MAX    127     /* max value for a char */
  56: #define CHAR_MIN    (-128)      /* min value for a char */
  57: 
  58: #define USHRT_MAX   65535       /* max value for an unsigned short */
  59: #define SHRT_MAX    32767       /* max value for a short */
  60: #define SHRT_MIN    (-32768)    /* min value for a short */
  61: 
  62: #define UINT_MAX    0xffff      /* max value for an unsigned int */
  63: #define INT_MAX     32767       /* max value for an int */
  64: #define INT_MIN     (-32767-1)  /* min value for an int */
  65: 
  66: #define ULONG_MAX   0xffffffff  /* max value for an unsigned long */
  67: #define LONG_MAX    2147483647L /* max value for a long */
  68: #define LONG_MIN    (-2147483647L-1L)   /* min value for a long */
  69: 
  70: #define SSIZE_MAX   INT_MAX     /* max value for a ssize_t */
  71: 
  72: #define SIZE_T_MAX  UINT_MAX    /* max value for a size_t */

Defined macros

Usage of this include