1 /* 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)limits.h 8.2 (Berkeley) 05/04/95 8 */ 9 10 #define CHAR_BIT 8 /* number of bits in a char */ 11 #define MB_LEN_MAX 6 /* Allow 31 bit UTF2 */ 12 13 14 #define CLK_TCK 64 /* ticks per second */ 15 16 /* 17 * According to ANSI (section 2.2.4.2), the values below must be usable by 18 * #if preprocessing directives. Additionally, the expression must have the 19 * same type as would an expression that is an object of the corresponding 20 * type converted according to the integral promotions. The subtraction for 21 * INT_MIN and LONG_MIN is so the value is not unsigned; 2147483648 is an 22 * unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2). 23 * These numbers work for pcc as well. The UINT_MAX and ULONG_MAX values 24 * are written as hex so that GCC will be quiet about large integer constants. 25 */ 26 #define SCHAR_MAX 127 /* min value for a signed char */ 27 #define SCHAR_MIN (-128) /* max value for a signed char */ 28 29 #define UCHAR_MAX 255 /* max value for an unsigned char */ 30 #define CHAR_MAX 127 /* max value for a char */ 31 #define CHAR_MIN (-128) /* min value for a char */ 32 33 #define USHRT_MAX 65535 /* max value for an unsigned short */ 34 #define SHRT_MAX 32767 /* max value for a short */ 35 #define SHRT_MIN (-32768) /* min value for a short */ 36 37 #define UINT_MAX 0xffffffff /* max value for an unsigned int */ 38 #define INT_MAX 2147483647 /* max value for an int */ 39 #define INT_MIN (-2147483647-1) /* min value for an int */ 40 41 #define ULONG_MAX 0xffffffffL /* max value for an unsigned long */ 42 #define LONG_MAX 2147483647L /* max value for a long */ 43 /* min value for a long */ 44 #define LONG_MIN (-2147483647L-1L) 45 46 #if !defined(_ANSI_SOURCE) 47 #define SSIZE_MAX INT_MAX /* max value for a ssize_t */ 48 49 #if !defined(_POSIX_SOURCE) 50 #define SIZE_T_MAX UINT_MAX /* max value for a size_t */ 51 52 /* GCC requires that quad constants be written as expressions. */ 53 #define UQUAD_MAX ((u_quad_t)0-1) /* max value for a uquad_t */ 54 /* max value for a quad_t */ 55 #define QUAD_MAX ((quad_t)(UQUAD_MAX >> 1)) 56 #define QUAD_MIN (-QUAD_MAX-1) /* min value for a quad_t */ 57 58 #endif /* !_POSIX_SOURCE */ 59 #endif /* !_ANSI_SOURCE */ 60