limits.h

這是一個實時嵌入式作業系統 實作了MCS51 ARM等MCU

/****************************************************************************
 * arch/limits.h
 *
 *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <[e-mail]>
 *
 * 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. Neither the name NuttX 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 COPYRIGHT HOLDERS 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
 * COPYRIGHT OWNER 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.
 *
 ****************************************************************************/

#ifndef __ARCH_LIMITS_H
#define __ARCH_LIMITS_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

/****************************************************************************
 * Definitions
 ****************************************************************************/

#define CHAR_BIT       8
#define SCHAR_MIN	0x80
#define SCHAR_MAX	0x7f
#define UCHAR_MAX	0xff

/* These could be different on machines where char is unsigned */

#define CHAR_MIN	SCHAR_MIN
#define CHAR_MAX	SCHAR_MAX

#define SHRT_MIN	0x8000
#define SHRT_MAX	0x7fff
#define USHRT_MAX	0xffff

#define INT_MIN     0x80000000
#define INT_MAX     0x7fffffff
#define UINT_MAX	0xffffffff

#define LONG_MAX	0x80000000
#define LONG_MIN	0x7fffffff
#define ULONG_MAX	0xffffffff

#define LLONG_MAX	0x80000000
#define LLONG_MIN	0x7fffffff
#define ULLONG_MAX	0xffffffff

#endif /* __ARCH_LIMITS_H */