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/*

 * 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 isdigit(d)     (((d) >= '0') && ((d) <= '9'))

#define islower(c)     (((c) >= 'a') && ((c) <= 'z'))

#define isupper(c)     (((c) >= 'A') && ((c) <= 'Z'))

#define isalpha(c)     (is_lower((c)) || is_upper((c)))

#define isalphanum(c)  (is_alpha((c)) || is_digit((c)))

#define isspace(c) \

    (((c) == ' ') || ((c) == '\t') || ((c) == '\n') || ((c) == '\r'))

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

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

#define min3(a, b, c)  ((a) < (b) ? (min(a, c)) : (min(b, c)))

#define max3(a, b, c)  ((a) > (b) ? (max(a, c)) : (max(b, c)))

/** Return true if the intervals 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 SIZE2KB(size)  ((size) >> 10)

#define SIZE2MB(size)  ((size) >> 20)

#define KB2SIZE(kb)  ((kb) << 10)

#define MB2SIZE(mb)  ((mb) << 20)

#define STRING(arg)      STRING_ARG(arg)

#define STRING_ARG(arg)  #arg

/** Pseudorandom generator

 *

 * A pretty standard linear congruential pseudorandom

 * number generator (m = 2^32 or 2^64 depending on architecture).

 *

 */

#define RANDI(seed) \

    ({ \

        (seed) = 1103515245 * (seed) + 12345; \

        (seed); \

    })

#endif

/** @}

 */