1*69217Smckusick /* 2*69217Smckusick * Copyright (c) 1988, 1993 3*69217Smckusick * The Regents of the University of California. All rights reserved. 4*69217Smckusick * 5*69217Smckusick * %sccs.include.redist.c% 6*69217Smckusick * 7*69217Smckusick * @(#)limits.h 8.1 (Berkeley) 05/04/95 8*69217Smckusick */ 9*69217Smckusick 10*69217Smckusick #define CHAR_BIT 8 /* number of bits in a char */ 11*69217Smckusick #define MB_LEN_MAX 6 /* Allow 31 bit UTF2 */ 12*69217Smckusick 13*69217Smckusick 14*69217Smckusick #define CLK_TCK 60 /* ticks per second */ 15*69217Smckusick 16*69217Smckusick /* 17*69217Smckusick * According to ANSI (section 2.2.4.2), the values below must be usable by 18*69217Smckusick * #if preprocessing directives. Additionally, the expression must have the 19*69217Smckusick * same type as would an expression that is an object of the corresponding 20*69217Smckusick * type converted according to the integral promotions. The subtraction for 21*69217Smckusick * INT_MIN and LONG_MIN is so the value is not unsigned; 2147483648 is an 22*69217Smckusick * unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2). 23*69217Smckusick * These numbers work for pcc as well. The UINT_MAX and ULONG_MAX values 24*69217Smckusick * are written as hex so that GCC will be quiet about large integer constants. 25*69217Smckusick */ 26*69217Smckusick #define SCHAR_MAX 127 /* min value for a signed char */ 27*69217Smckusick #define SCHAR_MIN (-128) /* max value for a signed char */ 28*69217Smckusick 29*69217Smckusick #define UCHAR_MAX 255 /* max value for an unsigned char */ 30*69217Smckusick #define CHAR_MAX 127 /* max value for a char */ 31*69217Smckusick #define CHAR_MIN (-128) /* min value for a char */ 32*69217Smckusick 33*69217Smckusick #define USHRT_MAX 65535 /* max value for an unsigned short */ 34*69217Smckusick #define SHRT_MAX 32767 /* max value for a short */ 35*69217Smckusick #define SHRT_MIN (-32768) /* min value for a short */ 36*69217Smckusick 37*69217Smckusick #define UINT_MAX 0xffffffff /* max value for an unsigned int */ 38*69217Smckusick #define INT_MAX 2147483647 /* max value for an int */ 39*69217Smckusick #define INT_MIN (-2147483647-1) /* min value for an int */ 40*69217Smckusick 41*69217Smckusick #define ULONG_MAX 0xffffffffL /* max value for an unsigned long */ 42*69217Smckusick #define LONG_MAX 2147483647L /* max value for a long */ 43*69217Smckusick /* min value for a long */ 44*69217Smckusick #define LONG_MIN (-2147483647L-1L) 45*69217Smckusick 46*69217Smckusick #if !defined(_ANSI_SOURCE) 47*69217Smckusick #define SSIZE_MAX INT_MAX /* max value for a ssize_t */ 48*69217Smckusick 49*69217Smckusick #if !defined(_POSIX_SOURCE) 50*69217Smckusick #define SIZE_T_MAX UINT_MAX /* max value for a size_t */ 51*69217Smckusick 52*69217Smckusick /* GCC requires that quad constants be written as expressions. */ 53*69217Smckusick #define UQUAD_MAX ((u_quad_t)0-1) /* max value for a uquad_t */ 54*69217Smckusick /* max value for a quad_t */ 55*69217Smckusick #define QUAD_MAX ((quad_t)(UQUAD_MAX >> 1)) 56*69217Smckusick #define QUAD_MIN (-QUAD_MAX-1) /* min value for a quad_t */ 57*69217Smckusick 58*69217Smckusick #endif /* !_POSIX_SOURCE */ 59*69217Smckusick #endif /* !_ANSI_SOURCE */ 60