source: mainline/kernel/generic/include/macros.h@ 7918fce

/*
 * Copyright (c) 2005 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

/** @addtogroup generic 
 * @{
 */
/** @file
 */

#ifndef KERN_MACROS_H_
#define KERN_MACROS_H_

#include <arch/types.h>

#define is_digit(d)     (((d) >= '0') && ((d) <= '9'))
#define is_lower(c)     (((c) >= 'a') && ((c) <= 'z'))
#define is_upper(c)     (((c) >= 'A') && ((c) <= 'Z'))
#define is_alpha(c)     (is_lower(c) || is_upper(c))
#define is_alphanum(c)  (is_alpha(c) || is_digit(c))
#define is_white(c)     (((c) == ' ') || ((c) == '\t') || ((c) == '\n') || \
                                ((c) == '\r'))

#define min(a,b)        ((a) < (b) ? (a) : (b))
#define max(a,b)        ((a) > (b) ? (a) : (b))

/** Return true if the interlvals overlap.
 *
 * @param s1 Start address of the first interval.
 * @param sz1 Size of the first interval.
 * @param s2 Start address of the second interval.
 * @param sz2 Size of the second interval.
 */
static inline int overlaps(uintptr_t s1, size_t sz1, uintptr_t s2, size_t sz2)
{
        uintptr_t e1 = s1 + sz1;
        uintptr_t e2 = s2 + sz2;

        return (s1 < e2) && (s2 < e1);
}
/* Compute overlapping of physical addresses */
#define PA_overlaps(x, szx, y, szy)     overlaps(KA2PA(x), szx, KA2PA(y), szy)

#define STRING(arg) STRING_ARG(arg)
#define STRING_ARG(arg) #arg

#endif

/** @}
 */