www.pudn.com > tcpipsim.rar > limits.h

/* 
 * Copyright (c) 1988, 1993 
 *	The Regents of the University of California.  All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in the 
 *    documentation and/or other materials provided with the distribution. 
 * 3. All advertising materials mentioning features or use of this software 
 *    must display the following acknowledgement: 
 *	This product includes software developed by the University of 
 *	California, Berkeley and its contributors. 
 * 4. Neither the name of the University nor the names of its contributors 
 *    may be used to endorse or promote products derived from this software 
 *    without specific prior written permission. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE. 
 * 
 *	@(#)limits.h	8.3 (Berkeley) 1/4/94 
 */ 
 
#define	CHAR_BIT	8		/* number of bits in a char */ 
#define	MB_LEN_MAX	6		/* Allow 31 bit UTF2 */ 
 
 
#define	CLK_TCK		60		/* ticks per second */ 
 
/* 
 * According to ANSI (section 2.2.4.2), the values below must be usable by 
 * #if preprocessing directives.  Additionally, the expression must have the 
 * same type as would an expression that is an object of the corresponding 
 * type converted according to the integral promotions.  The subtraction for 
 * INT_MIN and LONG_MIN is so the value is not unsigned; 2147483648 is an 
 * unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2). 
 * These numbers work for pcc as well.  The UINT_MAX and ULONG_MAX values 
 * are written as hex so that GCC will be quiet about large integer constants. 
 */ 
#define	SCHAR_MAX	127		/* min value for a signed char */ 
#define	SCHAR_MIN	(-128)		/* max value for a signed char */ 
 
#define	UCHAR_MAX	255		/* max value for an unsigned char */ 
#define	CHAR_MAX	127		/* max value for a char */ 
#define	CHAR_MIN	(-128)		/* min value for a char */ 
 
#define	USHRT_MAX	65535		/* max value for an unsigned short */ 
#define	SHRT_MAX	32767		/* max value for a short */ 
#define	SHRT_MIN	(-32768)	/* min value for a short */ 
 
#define	UINT_MAX	0xffffffff	/* max value for an unsigned int */ 
#define	INT_MAX		2147483647	/* max value for an int */ 
#define	INT_MIN		(-2147483647-1)	/* min value for an int */ 
 
#define	ULONG_MAX	0xffffffff	/* max value for an unsigned long */ 
#define	LONG_MAX	2147483647	/* max value for a long */ 
#define	LONG_MIN	(-2147483647-1)	/* min value for a long */ 
 
#if !defined(_ANSI_SOURCE) 
#define	SSIZE_MAX	INT_MAX		/* max value for a ssize_t */ 
 
#if !defined(_POSIX_SOURCE) 
#define	SIZE_T_MAX	UINT_MAX	/* max value for a size_t */ 
 
/* GCC requires that quad constants be written as expressions. */ 
#define	UQUAD_MAX	((u_quad_t)0-1)	/* max value for a uquad_t */ 
					/* max value for a quad_t */ 
#define	QUAD_MAX	((quad_t)(UQUAD_MAX >> 1)) 
#define	QUAD_MIN	(-QUAD_MAX-1)	/* min value for a quad_t */ 
 
#endif /* !_POSIX_SOURCE */ 
#endif /* !_ANSI_SOURCE */