kernel/generic/include/macros.h

   1 /*
   2  * Copyright (C) 2005 Jakub Jermar
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /** @addtogroup generic
  30  * @{
  31  */
  32 /** @file
  33  */
  34
  35 #ifndef KERN_MACROS_H_
  36 #define KERN_MACROS_H_
  37
  38 #include <arch/types.h>
  39 #include <typedefs.h>
  40
  41 #define is_digit(d)             (((d) >= '0') && ((d) <= '9'))
  42 #define is_lower(c)             (((c) >= 'a') && ((c) <= 'z'))
  43 #define is_upper(c)             (((c) >= 'A') && ((c) <= 'Z'))
  44 #define is_alpha(c)             (is_lower(c) || is_upper(c))
  45 #define is_alphanum(c)          (is_alpha(c) || is_digit(c))
  46 #define is_white(c)             (((c) == ' ') || ((c) == '\t') || ((c) == '\n') || ((c) == '\r'))
  47
  48 #define min(a,b)        ((a) < (b) ? (a) : (b))
  49 #define max(a,b)        ((a) > (b) ? (a) : (b))
  50
  51 /** Return true if the interlvals overlap.
  52  *
  53  * @param s1 Start address of the first interval.
  54  * @param sz1 Size of the first interval.
  55  * @param s2 Start address of the second interval.
  56  * @param sz2 Size of the second interval.
  57  */
  58 static inline int overlaps(uintptr_t s1, size_t sz1, uintptr_t s2, size_t sz2)
  59 {
  60         uintptr_t e1 = s1 + sz1;
  61         uintptr_t e2 = s2 + sz2;
  62
  63         return (s1 < e2) && (s2 < e1);
  64 }
  65 /* Compute overlapping of physical addresses */
  66 #define PA_overlaps(x, szx, y, szy)     overlaps(KA2PA(x), szx, KA2PA(y), szy)
  67
  68 #define STRING(arg) STRING_ARG(arg)
  69 #define STRING_ARG(arg) #arg
  70
  71 #endif
  72
  73 /** @}
  74  */